/* DeutschLernen — light / dark themes (business, blue) */
:root {
  color-scheme: light;
  --bg0: #f2f5f8;
  --bg1: #e8eef4;
  --bg2: #ffffff;
  --line: rgba(15, 35, 55, 0.14);
  --text: #0f1c2a;
  --muted: #5a6b7d;
  --accent: #1565c0;
  --accent-soft: rgba(21, 101, 192, 0.12);
  --accent-2: #c05621;
  --danger: #c62828;
  --ok: #2e7d32;
  --shadow: 0 8px 24px rgba(15, 35, 55, 0.08);
  --panel: rgba(255, 255, 255, 0.92);
  --panel-strong: #ffffff;
  --input-bg: rgba(15, 35, 55, 0.04);
  --soft: rgba(15, 35, 55, 0.04);
  --soft-2: rgba(15, 35, 55, 0.07);
  --bubble-user: rgba(21, 101, 192, 0.12);
  --bubble-other: rgba(15, 35, 55, 0.05);
  --alert-bg: rgba(198, 40, 40, 0.08);
  --alert-border: rgba(198, 40, 40, 0.28);
  --alert-fg: #8e1b1b;
  --alert-ok-bg: rgba(46, 125, 50, 0.1);
  --alert-ok-border: rgba(46, 125, 50, 0.3);
  --alert-ok-fg: #1b5e20;
  --glow-1: rgba(21, 101, 192, 0.1);
  --glow-2: rgba(66, 133, 194, 0.08);
  --bg-end: #dce5ee;
  --card-grad: linear-gradient(180deg, #ffffff, #f5f8fb);
  --auth-grad: linear-gradient(180deg, #ffffff, #f3f7fb);
  --progress-track: rgba(15, 35, 55, 0.08);
  --ru: #0b6cbc;
  --ru-soft: rgba(11, 108, 188, 0.1);
  --ru-border: rgba(11, 108, 188, 0.28);
  --de-soft: rgba(21, 101, 192, 0.1);
  --de-border: rgba(21, 101, 192, 0.28);
  --btn-fg: #ffffff;
  --theme-color: #f2f5f8;
  --topbar-bg: rgba(242, 245, 248, 0.94);
  --font-display: "IBM Plex Sans", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --radius: 0;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg0: #0b1218;
  --bg1: #111a24;
  --bg2: #182230;
  --line: rgba(160, 190, 220, 0.16);
  --text: #e6eef6;
  --muted: #8fa3b8;
  --accent: #5b9fd4;
  --accent-soft: rgba(91, 159, 212, 0.16);
  --accent-2: #e0a060;
  --danger: #ff6b6b;
  --ok: #6bcf8e;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  --panel: rgba(16, 24, 34, 0.88);
  --panel-strong: rgba(18, 28, 40, 0.96);
  --input-bg: rgba(0, 0, 0, 0.3);
  --soft: rgba(0, 0, 0, 0.24);
  --soft-2: rgba(255, 255, 255, 0.04);
  --bubble-user: rgba(91, 159, 212, 0.18);
  --bubble-other: rgba(255, 255, 255, 0.04);
  --alert-bg: rgba(255, 107, 107, 0.12);
  --alert-border: rgba(255, 107, 107, 0.35);
  --alert-fg: #ffd0d0;
  --alert-ok-bg: rgba(107, 207, 142, 0.1);
  --alert-ok-border: rgba(107, 207, 142, 0.35);
  --alert-ok-fg: #c8ffd8;
  --glow-1: rgba(91, 159, 212, 0.14);
  --glow-2: rgba(70, 120, 180, 0.1);
  --bg-end: #0d1520;
  --card-grad: linear-gradient(180deg, rgba(24, 34, 48, 0.95), rgba(14, 20, 30, 0.95));
  --auth-grad: linear-gradient(180deg, rgba(24, 34, 48, 0.96), rgba(14, 20, 30, 0.96));
  --progress-track: rgba(255, 255, 255, 0.06);
  --ru: #7ec8ff;
  --ru-soft: rgba(126, 200, 255, 0.08);
  --ru-border: rgba(126, 200, 255, 0.22);
  --de-soft: rgba(91, 159, 212, 0.1);
  --de-border: rgba(91, 159, 212, 0.24);
  --btn-fg: #061018;
  --theme-color: #0b1218;
  --topbar-bg: rgba(11, 18, 24, 0.92);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  letter-spacing: 0.01em;
  background:
    linear-gradient(180deg, var(--bg0), var(--bg1) 55%, var(--bg-end));
  background-attachment: fixed;
  transition: background .2s ease, color .15s ease;
  overflow-x: clip;
}

body {
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.shell {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.55rem 0.75rem;
  width: 100vw;
  max-width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding: 0.7rem 1rem;
  box-sizing: border-box;
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--topbar-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
}
html[data-theme="light"] .topbar,
html[data-theme="dark"] .topbar {
  border-bottom-color: var(--line);
}
html[data-theme="dark"] .theme-toggle,
html[data-theme="dark"] .nav-menu-btn,
html[data-theme="dark"] .profile-btn,
html[data-theme="dark"] .lang-switch select {
  background: color-mix(in srgb, var(--panel-strong) 85%, #fff 8%);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}


.nav-tools {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-left: auto;
}

.theme-toggle,
.nav-menu-btn,
.profile-btn {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid color-mix(in srgb, var(--line) 70%, var(--accent) 30%);
  background: var(--panel-strong);
  color: var(--text);
  display: grid;
  place-items: center;
  cursor: pointer;
  flex-shrink: 0;
  padding: 0;
  margin: 0;
  line-height: 0;
  text-decoration: none;
  box-shadow: 0 1px 3px rgba(15, 35, 55, 0.08);
  transition: background .2s ease, transform .15s ease, border-color .2s ease, box-shadow .2s ease;
}
.theme-toggle:hover,
.nav-menu-btn:hover,
.profile-btn:hover {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  box-shadow: 0 2px 6px rgba(21, 101, 192, 0.12);
  transform: none;
  filter: none;
  text-decoration: none;
  color: var(--text);
}
.theme-toggle svg,
.nav-menu-btn svg,
.profile-btn svg {
  width: 20px;
  height: 20px;
  display: block;
  margin: 0;
}
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.nav-menu-btn .icon-close { display: none; }
body.nav-open .nav-menu-btn .icon-menu { display: none; }
body.nav-open .nav-menu-btn .icon-close { display: block; }

.lang-switch {
  display: inline-flex;
  margin: 0;
}
.lang-switch select {
  width: auto;
  min-width: 3.4rem;
  padding: 0.45rem 0.45rem;
  border-radius: 8px;
  border: 1px solid color-mix(in srgb, var(--line) 70%, var(--accent) 30%);
  font-size: 0.82rem;
  background: var(--panel-strong);
  text-align: center;
  box-shadow: 0 1px 3px rgba(15, 35, 55, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.brand:hover { text-decoration: none; }

.brand-mark {
  width: 34px;
  height: 34px;
  display: block;
  flex-shrink: 0;
  filter: none;
  animation: none;
}

.brand-text span { color: var(--accent); }

.topbar-page-title {
  display: none;
  margin: 0;
  flex: 1;
  min-width: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
}

@keyframes markPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.04); opacity: 0.92; }
}

.nav,
.nav-drawer {
  display: flex;
  gap: 0.45rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.92rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.nav-drawer {
  width: 100%;
  order: 3;
}
.nav-drawer > a,
.nav > a {
  padding: 0.35rem 0.55rem;
  border-radius: 8px;
  color: var(--muted);
  transition: background .15s ease, color .15s ease;
}
.nav-drawer > a:hover,
.nav > a:hover {
  background: var(--accent-soft);
  color: var(--text);
  text-decoration: none;
}
.nav-user-label {
  padding: 0.35rem 0.55rem;
  font-size: 0.85rem;
}

.nav form { display: inline; margin: 0; }

/* Desktop: links in header row before theme tools, hide hamburger */
@media (min-width: 861px) {
  .nav-menu-btn { display: none; }
  .topbar {
    flex-wrap: nowrap;
  }
  .nav-drawer {
    width: auto;
    order: 0;
    flex: 1;
    justify-content: flex-end;
    margin: 0 0.35rem;
  }
  .nav-tools {
    margin-left: 0;
    order: 1;
  }
  .lang-switch select {
    min-width: 4.2rem;
    padding: 0.45rem 0.7rem;
    font-size: 0.88rem;
  }
}

/* Mobile: logo mark only, tools + hamburger one row, drawer panel */
@media (max-width: 860px) {
  .brand-text { display: none; }
  .brand-mark { width: 32px; height: 32px; }
  .topbar-page-title { display: block; }
  .page-h1 { display: none; }
  .topbar {
    flex-wrap: nowrap;
    gap: 0.35rem;
  }
  .nav-drawer {
    display: none;
    position: absolute;
    left: 0.75rem;
    right: 0.75rem;
    top: calc(100% + 0.35rem);
    width: auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
    padding: 0.65rem;
    border: 1px solid var(--line);
    border-radius: 0;
    background: var(--panel-strong);
    box-shadow: var(--shadow);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }
  body.nav-open .nav-drawer { display: flex; }
  .nav-drawer > a,
  .nav-user-label {
    padding: 0.75rem 0.85rem;
    border-radius: 0;
    width: 100%;
  }
  .theme-toggle,
  .nav-menu-btn,
  .profile-btn {
    width: 38px;
    height: 38px;
    padding: 0;
  }
}

.btn, button.btn {
  appearance: none;
  border: 1px solid transparent;
  background: var(--accent);
  color: var(--btn-fg);
  font-weight: 700;
  font-family: inherit;
  border-radius: 8px;
  padding: 0.75rem 1.2rem;
  cursor: pointer;
  transition: transform .15s ease, filter .15s ease, background .15s ease;
}

.btn:hover { filter: brightness(1.04); transform: none; }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

.btn.ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

.btn.warn { background: var(--accent-2); color: #fff; }
.btn.danger { background: transparent; border-color: rgba(255,107,107,.45); color: var(--danger); }

.auth-wrap {
  min-height: calc(100vh - 2rem);
  display: grid;
  place-items: center;
  padding: 1rem;
}

.auth-card {
  width: min(440px, 100%);
  padding: 2rem;
  border: 1px solid var(--line);
  background: var(--auth-grad);
  box-shadow: var(--shadow);
  border-radius: 0;
  animation: rise .55s ease both;
}

.auth-card h1 {
  margin: 0 0 .35rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.3rem);
  letter-spacing: -0.03em;
}

.auth-card p.lead {
  margin: 0 0 1.4rem;
  color: var(--muted);
  line-height: 1.5;
}

label {
  display: block;
  margin: 0.85rem 0 0.35rem;
  color: var(--muted);
  font-size: 0.9rem;
}

input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--input-bg);
  color: var(--text);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  font: inherit;
  outline: none;
}

input:focus, textarea:focus, select:focus {
  border-color: rgba(21, 101, 192, 0.65);
  box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.15);
}

textarea { min-height: 140px; resize: vertical; }

.password-field {
  position: relative;
  display: block;
}

.password-field input {
  padding-right: 3.1rem;
}

.password-toggle {
  position: absolute;
  top: 50%;
  right: 0.45rem;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.3rem;
  height: 2.3rem;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.password-toggle:hover {
  color: var(--accent);
  background: var(--accent-soft);
}

.password-toggle:focus-visible {
  outline: 2px solid rgba(21, 101, 192, 0.65);
  outline-offset: 1px;
}

.password-toggle svg {
  width: 19px;
  height: 19px;
  display: block;
}

.password-toggle .icon-eye-off { display: none; }
.password-toggle[aria-pressed="true"] .icon-eye { display: none; }
.password-toggle[aria-pressed="true"] .icon-eye-off { display: block; }

.form-actions {
  margin-top: 1.25rem;
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
}

.alert {
  margin: 0 0 1rem;
  padding: .8rem 1rem;
  border-radius: 0;
  background: var(--alert-bg);
  border: 1px solid var(--alert-border);
  color: var(--alert-fg);
}

.alert.ok {
  background: var(--alert-ok-bg);
  border-color: var(--alert-ok-border);
  color: var(--alert-ok-fg);
}

.chat-layout {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: calc(100vh - 5rem);
  gap: 1rem;
  padding-bottom: 1.5rem;
}

.chat-header h1 {
  margin: .4rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -0.03em;
}

.chat-header p {
  margin: .4rem 0 0;
  color: var(--muted);
}

.panel {
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: 0;
  padding: 1.1rem 1.15rem;
  box-shadow: var(--shadow);
}

#messages {
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: .75rem;
  min-height: 42vh;
  max-height: 52vh;
  padding: .4rem;
}

.bubble {
  max-width: min(720px, 92%);
  padding: .85rem 1rem;
  border-radius: 0;
  line-height: 1.45;
  animation: rise .35s ease both;
  white-space: pre-wrap;
}

.bubble.user {
  align-self: flex-end;
  background: var(--bubble-user);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}

.bubble.assistant {
  align-self: flex-start;
  background: var(--bubble-other);
  border: 1px solid var(--line);
}

.composer {
  display: grid;
  grid-template-columns: 180px 1fr auto auto;
  gap: .7rem;
  align-items: end;
}

.composer-input { min-width: 0; }

.mic-btn {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--text);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
}

.mic-btn.listening {
  background: rgba(255, 107, 107, 0.2);
  border-color: rgba(255, 107, 107, 0.55);
  box-shadow: 0 0 0 6px rgba(255, 107, 107, 0.12);
  animation: pulse 1.2s ease infinite;
}

.status-line {
  min-height: 1.25rem;
  color: var(--muted);
  font-size: .9rem;
}

.chat-controls {
  margin-top: .8rem;
  display: flex;
  gap: .85rem;
  align-items: center;
  flex-wrap: wrap;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.admin-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1rem;
  padding-bottom: 2rem;
}

.side {
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 1rem;
  background: var(--panel); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  height: fit-content;
}

.side a {
  display: block;
  padding: .65rem .75rem;
  border-radius: 0;
  color: var(--text);
  text-decoration: none;
  margin-bottom: .25rem;
}

.side a:hover, .side a.active {
  background: var(--accent-soft);
  text-decoration: none;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th, .table td {
  text-align: left;
  padding: .75rem .5rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.table th { color: var(--muted); font-weight: 600; }

.dict-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 1rem;
  margin-bottom: 0.35rem;
}
.dict-search-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.dict-search-row input[type="search"] {
  flex: 1;
  min-width: 12rem;
}
@media (max-width: 640px) {
  .dict-form-grid { grid-template-columns: 1fr; }
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .8rem;
  margin-bottom: 1rem;
}

.stat {
  padding: 1rem;
  border-radius: 0;
  border: 1px solid var(--line);
  background: var(--soft);
}

.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.7rem;
  margin-top: .2rem;
}

.muted { color: var(--muted); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9rem; }

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@media (max-width: 860px) {
  .composer { grid-template-columns: 1fr; }
  .admin-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  #messages { max-height: 48vh; }
}

/* ── German learning ─────────────────────────────────────────── */

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.learn-home { padding-bottom: 2.5rem; }

.learn-hero {
  padding: 1.5rem 0 1.75rem;
  animation: rise .5s ease both;
}

.learn-hero-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  flex-wrap: wrap;
}

.learn-hero-title-row .page-h1 {
  margin: 0.35rem 0 0;
  flex: 1;
  min-width: 0;
}

.learn-create-btn {
  flex-shrink: 0;
  margin-top: 0.35rem;
  white-space: nowrap;
}

.learn-hero h1 {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: -0.03em;
}

.learn-hero .lead,
.learn-narrow .lead,
.learn-edit .lead,
.quiz-header .lead {
  margin: 0.5rem 0 0;
  color: var(--muted);
  line-height: 1.5;
  max-width: 36rem;
}

@media (max-width: 860px) {
  .learn-hero-lead { display: none; }
  .learn-create-btn { display: none; }
  .learn-hero-title-row { display: none; }
}
.quiz-nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.5rem;
  margin: 0 0 0.65rem;
  font-size: 0.95rem;
}
.quiz-nav-links a.muted {
  text-decoration: underline;
  text-underline-offset: 0.15em;
}
.quiz-nav-links a.muted:hover {
  color: var(--text);
}
.quiz-nav-links .sep {
  opacity: 0.55;
  text-decoration: none;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.section-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-top: 0.25rem;
}

.section-fold {
  border: 1px solid var(--line);
  background: var(--card-grad);
  box-shadow: var(--shadow);
  animation: rise .45s ease both;
}

.section-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto auto;
  align-items: center;
  gap: 0.55rem 0.75rem;
  padding: 0.95rem 1.15rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.section-summary:not(:has(.section-add-btn)) {
  grid-template-columns: minmax(0, 1fr) auto auto;
}
.section-summary::-webkit-details-marker { display: none; }

.section-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.section-count {
  color: var(--muted);
  font-size: 0.92rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.section-add-btn {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--line) 70%, var(--accent) 30%);
  background: var(--panel-strong);
  color: var(--accent);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(15, 35, 55, 0.08);
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.section-add-btn:hover {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
  color: var(--accent);
  text-decoration: none;
}

.section-chevron {
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform .18s ease;
  justify-self: end;
  flex-shrink: 0;
}
.section-fold[open] .section-chevron {
  transform: rotate(-135deg);
  margin-top: 0.2rem;
}

.section-body {
  padding: 1rem 1.15rem 1.15rem;
  border-top: 1px solid var(--line);
}

.section-empty {
  margin: 0.85rem 0 0;
  font-size: 0.95rem;
}

.topic-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--card-grad);
  color: var(--text);
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: transform .15s ease, border-color .15s ease;
  animation: rise .45s ease both;
}

.topic-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
  text-decoration: none;
}

.topic-card-main {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  color: inherit;
  text-decoration: none;
  flex: 1;
  min-width: 0;
}
.topic-card-main:hover {
  text-decoration: none;
  color: inherit;
}

.topic-card h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.01em;
}

.topic-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.55rem;
}
.topic-card-top h2 {
  flex: 1;
  min-width: 0;
  margin: 0;
}
.topic-title-link {
  color: inherit;
  text-decoration: none;
}
.topic-title-link:hover {
  color: var(--accent);
  text-decoration: none;
}

.topic-card-actions {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.3rem;
  flex-shrink: 0;
  margin-left: auto;
  padding-top: 0;
  border-top: none;
}

.topic-delete-form {
  display: inline-flex;
  margin: 0;
}

.topic-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  min-width: 2.15rem;
  height: 2.15rem;
  padding: 0 0.45rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft, color-mix(in srgb, var(--card, #fff) 88%, var(--accent) 6%));
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  line-height: 1;
  transition: border-color .15s ease, background .15s ease, color .15s ease;
}
.topic-icon-btn svg {
  width: 1.15rem;
  height: 1.15rem;
  flex-shrink: 0;
}
.topic-icon-btn:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  text-decoration: none;
  color: var(--text);
}
.topic-icon-btn.danger {
  color: #c62828;
}
.topic-icon-btn.danger:hover {
  border-color: color-mix(in srgb, #c62828 45%, transparent);
  background: rgba(198, 40, 40, 0.1);
  color: #b71c1c;
}
.topic-icon-label {
  font-size: 0.82rem;
  white-space: nowrap;
}
/* Keep title row compact: icons only */
.topic-card-actions .topic-icon-label {
  display: none;
}
.topic-card-actions .topic-icon-btn {
  width: 2.15rem;
  min-width: 2.15rem;
  padding: 0;
}

@media (max-width: 720px) {
  .topic-icon-btn {
    width: 2.25rem;
    min-width: 2.25rem;
    height: 2.25rem;
    padding: 0;
  }
  .topic-icon-label {
    display: none;
  }
  .topic-icon-btn svg {
    width: 1.15rem;
    height: 1.15rem;
  }
  .topic-card-top {
    align-items: center;
  }
}

.topic-meta { color: var(--muted); font-size: 0.85rem; white-space: nowrap; }
.topic-author {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.3;
  opacity: 0.9;
  word-break: break-word;
}
.nav-user {
  max-width: 12rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--muted);
  font-size: 0.9rem;
}
.topic-desc {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.topic-progress { margin-top: auto; }
.topic-progress-triple {
  display: grid;
  gap: 0.55rem;
  margin-top: auto;
}
.topic-class-progress {
  display: grid;
  grid-template-columns: 7.5rem 1fr auto;
  align-items: center;
  gap: 0.45rem 0.6rem;
  color: inherit;
  text-decoration: none;
  padding: 0.2rem 0;
  border-radius: 6px;
}
.topic-class-progress:hover {
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.topic-class-progress.lg {
  grid-template-columns: 1fr;
  gap: 0.35rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line);
  margin-bottom: 0.5rem;
}
.topic-class-progress.lg:last-child { margin-bottom: 0; }
.topic-class-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topic-class-stats {
  font-size: 0.75rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.topic-progress-bar {
  height: 6px;
  border-radius: 0;
  background: var(--progress-track);
  overflow: hidden;
}
.topic-progress-bar.lg { height: 10px; }
.topic-progress-bar > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #42a5f5);
  border-radius: 0;
  transition: width .35s ease;
}

/* Noun article colors: die red, der blue, das green */
.de-art-die,
.de-art-die .de-art,
input.de-art-die,
.quiz-option.de-art-die,
#quiz-prompt.de-art-die {
  color: #c62828 !important;
}
.de-art-der,
.de-art-der .de-art,
input.de-art-der,
.quiz-option.de-art-der,
#quiz-prompt.de-art-der {
  color: #1565c0 !important;
}
.de-art-das,
.de-art-das .de-art,
input.de-art-das,
.quiz-option.de-art-das,
#quiz-prompt.de-art-das {
  color: #2e7d32 !important;
}
:root[data-theme="dark"] .de-art-die,
:root[data-theme="dark"] .de-art-die .de-art,
:root[data-theme="dark"] input.de-art-die,
:root[data-theme="dark"] .quiz-option.de-art-die,
:root[data-theme="dark"] #quiz-prompt.de-art-die {
  color: #ff6b6b !important;
}
:root[data-theme="dark"] .de-art-der,
:root[data-theme="dark"] .de-art-der .de-art,
:root[data-theme="dark"] input.de-art-der,
:root[data-theme="dark"] .quiz-option.de-art-der,
:root[data-theme="dark"] #quiz-prompt.de-art-der {
  color: #5b9fd4 !important;
}
:root[data-theme="dark"] .de-art-das,
:root[data-theme="dark"] .de-art-das .de-art,
:root[data-theme="dark"] input.de-art-das,
:root[data-theme="dark"] .quiz-option.de-art-das,
:root[data-theme="dark"] #quiz-prompt.de-art-das {
  color: #6bcf8e !important;
}

.quiz-class-tabs {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.35rem;
  margin: 0;
  min-width: 0;
  overflow-x: auto;
}
.quiz-class-tab {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}
.quiz-class-tab:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  color: var(--accent);
}
.quiz-class-tab.is-active {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
  color: var(--accent);
  font-weight: 600;
}
.quiz-class-tab-short { display: none; }
.quiz-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  width: 100%;
  margin-top: 0.45rem;
}
.quiz-toolbar .quiz-admin-word-actions {
  margin-left: 0;
}
@media (max-width: 640px) {
  .quiz-class-tab {
    padding: 0.28rem 0.55rem;
    font-size: 0.78rem;
  }
  .quiz-class-tab-full { display: none; }
  .quiz-class-tab-short { display: inline; }
}

.word-class-block {
  margin-bottom: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--card, #fff) 92%, var(--bg2) 8%);
  overflow: visible;
}
.word-class-block:last-child { margin-bottom: 0; }
.word-class-heading {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0.7rem 0.85rem;
  font-size: 1rem;
  font-family: var(--font-display);
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.word-class-heading::-webkit-details-marker { display: none; }
.word-class-chevron {
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
  flex-shrink: 0;
}
.word-class-block[open] > .word-class-heading .word-class-chevron {
  transform: rotate(45deg);
}
.word-class-title {
  font-weight: 650;
}
.word-class-count {
  font-size: 0.85rem;
}
.word-class-body {
  padding: 0 0.55rem 0.55rem;
  overflow: visible;
}
.word-class-empty { margin: 0.35rem 0.3rem 0.55rem; }

.word-move {
  position: relative;
  display: inline-flex;
}
.word-move-menu {
  position: absolute;
  top: calc(100% + 0.2rem);
  right: 0;
  left: auto;
  z-index: 40;
  min-width: 10.5rem;
  max-width: min(16rem, calc(100vw - 1.5rem));
  display: grid;
  gap: 0.15rem;
  padding: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card, #fff);
  box-shadow: 0 8px 24px color-mix(in srgb, #000 14%, transparent);
}
.word-move-menu[hidden] { display: none !important; }
.word-move-option {
  display: block;
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  color: var(--text);
  padding: 0.45rem 0.55rem;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  font-size: 0.88rem;
}
.word-move-option:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

@media (max-width: 720px) {
  .word-move-menu {
    left: 0;
    right: auto;
  }
}

@media (max-width: 640px) {
  .topic-class-progress {
    grid-template-columns: 1fr auto;
  }
  .topic-class-label {
    grid-column: 1 / -1;
  }
}
.topic-stats-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: 0.82rem;
}
.quiz-progress-meta {
  display: grid;
  grid-template-columns: auto 1fr auto auto 1fr;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: nowrap;
}
.quiz-progress-meta .quiz-timer-count {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.quiz-progress-meta #progress-label {
  justify-self: start;
}
.quiz-progress-meta #remaining-label {
  justify-self: center;
  text-align: center;
}
.quiz-progress-meta #quiz-score {
  justify-self: center;
  text-align: center;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  font-weight: 600;
}
.quiz-progress-meta #quiz-next {
  justify-self: end;
  margin-left: 0;
  flex-shrink: 0;
  min-width: 4.5rem;
  visibility: visible;
  opacity: 1;
  transition: opacity 0.15s ease;
}
.quiz-progress-meta #quiz-next:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  /* keep layout size — do not hide */
  visibility: visible;
  pointer-events: none;
}

@media (max-width: 640px) {
  .quiz-progress-meta {
    grid-template-columns: auto 1fr auto;
    row-gap: 0.4rem;
  }
  .quiz-progress-meta .quiz-timer-count { justify-self: start; }
  .quiz-progress-meta #progress-label { justify-self: start; }
  .quiz-progress-meta #remaining-label { justify-self: end; text-align: right; }
  .quiz-progress-meta #quiz-score { justify-self: start; text-align: left; }
  .quiz-progress-meta #quiz-next { justify-self: end; grid-column: 3; }
}

.quiz-timer {
  margin: 0.45rem 0 0;
}
.quiz-timer[hidden] {
  display: none !important;
}
.quiz-timer-bar {
  height: 8px;
  border-radius: 999px;
  background: var(--progress-track);
  overflow: hidden;
}
.quiz-timer-fill {
  display: block;
  height: 100%;
  width: 0%;
  border-radius: 999px;
  transition: width 0.05s linear, background-color 0.2s ease;
}
.quiz-timer-fill.zone-green {
  background: var(--ok);
}
.quiz-timer-fill.zone-yellow {
  background: #f0b429;
}
.quiz-timer-fill.zone-red {
  background: var(--danger);
}
.quiz-timer-zone {
  font-weight: 700;
}
.quiz-timer-zone.zone-green { color: var(--ok); }
.quiz-timer-zone.zone-yellow { color: #c48a00; }
.quiz-timer-zone.zone-red { color: var(--danger); }

.empty-state {
  text-align: center;
  padding: 2.5rem 1.5rem;
  display: grid;
  gap: 1rem;
  justify-items: center;
}

.learn-narrow {
  max-width: 560px;
  margin: 1.5rem auto 2rem;
}

.learn-edit, .learn-quiz, .learn-listen { padding-bottom: 2.5rem; }

.learn-edit-header, .quiz-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: flex-start;
  margin: 0.75rem 0 1.1rem;
}
.quiz-header > div {
  width: 100%;
  min-width: 0;
}

.learn-edit-header h1, .quiz-header h1 {
  margin: 0.25rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
}

.quiz-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.55rem;
  width: 100%;
  margin-top: 0.25rem;
}
.quiz-title-row h1 {
  margin: 0;
  flex: 1;
  min-width: 0;
}
.quiz-admin-word-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  flex-shrink: 0;
}
.quiz-word-btn {
  width: 2rem;
  height: 2rem;
  border: none;
  border-radius: 0;
  background: transparent;
  cursor: pointer;
  font-size: 1.15rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
}
.quiz-word-btn.edit:hover {
  color: var(--text);
  background: var(--soft);
}
.quiz-word-btn.delete {
  color: #c62828;
  font-size: 1.55rem;
  font-weight: 600;
}
.quiz-word-btn.delete:hover {
  background: rgba(198, 40, 40, 0.12);
  color: #b71c1c;
}

.quiz-edit-dialog {
  border: 1px solid var(--border, #d5ddd8);
  border-radius: 0;
  padding: 0;
  max-width: min(92vw, 26rem);
  background: var(--panel, #fff);
  color: var(--text);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.18);
}
.quiz-edit-dialog::backdrop {
  background: rgba(20, 28, 24, 0.45);
}
.quiz-edit-form {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.15rem 1.25rem 1.25rem;
}
.quiz-edit-form h2 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
}
.quiz-edit-form label {
  font-size: 0.85rem;
  color: var(--muted);
}
.quiz-edit-form input {
  margin-bottom: 0.35rem;
}
.quiz-edit-form .form-actions {
  margin-top: 0.5rem;
}

.learn-edit .panel { margin-bottom: 1rem; }
.learn-edit h2 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
}

.fold-panel {
  padding: 0;
  overflow: hidden;
}
.fold-summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.95rem 1rem;
  user-select: none;
}
.fold-summary::-webkit-details-marker { display: none; }
.fold-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}
.fold-chevron {
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform .2s ease;
  flex-shrink: 0;
  margin-right: 0.2rem;
}
.fold-panel[open] .fold-chevron {
  transform: rotate(225deg);
  margin-top: 0.25rem;
}
.fold-body {
  padding: 0 1rem 1rem;
  border-top: 1px solid var(--line);
  padding-top: 0.9rem;
}
.fold-summary:hover {
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.icon-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  line-height: 1;
}
.icon-action svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  display: block;
}
.action-label {
  display: inline;
}

.word-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 0.65rem;
  align-items: end;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
}

.word-row-inputs { border-bottom: none; padding: 0; align-items: end; }
.learn-edit[data-can-edit="0"] .word-row { grid-template-columns: 1fr 1fr; }

.word-row-actions {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  align-items: center;
}

.with-speak {
  display: flex;
  gap: 0.35rem;
  align-items: center;
}
.with-speak input { flex: 1; min-width: 0; }

.speak-btn {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--text);
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 0.95rem;
  padding: 0;
  transition: background .15s ease, border-color .15s ease;
}
.speak-btn:hover {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
}
.speak-btn.lg { width: 48px; height: 48px; font-size: 1.1rem; }
.speak-btn.sm {
  width: 32px;
  height: 32px;
  font-size: 0.8rem;
  background: transparent;
}

.btn-sm {
  padding: 0.45rem 0.75rem;
  font-size: 0.85rem;
}

.photo-upload {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 0.75rem;
}
.photo-upload input[type="file"] { max-width: 280px; }

.upload-mode-toggle {
  display: inline-flex;
  gap: 0;
  margin: 0 0 0.85rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--soft);
}
.upload-mode-btn {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  padding: 0.55rem 1rem;
  cursor: pointer;
  transition: background .15s ease, color .15s ease;
}
.upload-mode-btn.active {
  background: var(--accent);
  color: var(--btn-fg);
}
.upload-mode-btn:not(.active):hover {
  background: var(--accent-soft);
  color: var(--text);
}
#text-title-wrap {
  margin: 0 0 0.85rem;
}
#text-title-wrap label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 600;
}

.topic-texts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  padding: 0 0.15rem 0.35rem;
  margin-top: 0.15rem;
}
.topic-text-link {
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}
.topic-text-link:hover {
  color: var(--text);
  border-bottom-color: var(--accent);
}

.topic-books {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.75rem;
  padding: 0.15rem 0.15rem 0.45rem;
  margin-top: 0.2rem;
}
.topic-book-link {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  max-width: 4.5rem;
  text-decoration: none;
  color: var(--text);
}
.topic-book-cover {
  width: 2.6rem;
  height: 3.5rem;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--accent) 12%, var(--bg2));
  display: block;
}
.topic-book-cover--empty {
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--accent) 22%, var(--bg2)), var(--bg2));
}
.topic-book-title {
  font-size: 0.72rem;
  line-height: 1.2;
  text-align: center;
  word-break: break-word;
}
.topic-book-link:hover .topic-book-title {
  color: var(--accent);
}

.topic-book-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 0.35rem 0.15rem 0.15rem;
  color: inherit;
  min-width: 0;
}
.topic-book-card-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
}
.topic-book-card-row {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.85rem 1rem;
  align-items: center;
  min-width: 0;
}
.topic-book-card-cover-link {
  display: block;
  width: 5.5rem;
  flex-shrink: 0;
  text-decoration: none;
}
.topic-book-card-cover {
  width: 5.5rem;
  height: 7.5rem;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--accent) 14%, var(--bg2));
  display: block;
  box-shadow: 0 4px 12px color-mix(in srgb, #000 12%, transparent);
}
.topic-book-card-cover--empty {
  background:
    linear-gradient(155deg, color-mix(in srgb, var(--accent) 28%, var(--bg2)), var(--bg2));
}
.topic-book-card-row .topic-progress-triple {
  margin-top: 0;
  min-width: 0;
}
.topic-book-card-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.25;
  color: inherit;
  text-decoration: none;
}
.topic-book-card-title:hover {
  color: var(--accent);
}
.topic-card--with-book .topic-book-card-row .topic-progress {
  margin-top: 0;
}
@media (max-width: 520px) {
  .topic-book-card-row {
    grid-template-columns: 4.4rem 1fr;
    gap: 0.7rem;
  }
  .topic-book-card-cover-link {
    width: 4.4rem;
  }
  .topic-book-card-cover {
    width: 4.4rem;
    height: 6rem;
  }
}

.topic-book-edit-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}
.topic-book-edit-link:hover { color: var(--accent); }
.topic-book-cover-thumb,
.topic-book-cover-placeholder {
  width: 2rem;
  height: 2.7rem;
  border-radius: 4px;
  border: 1px solid var(--line);
  object-fit: cover;
  flex-shrink: 0;
}
.topic-book-cover-placeholder {
  display: inline-block;
  background: color-mix(in srgb, var(--accent) 14%, var(--bg));
}

.book-reader-panel { position: relative; }
.book-reader-hint { margin: 0 0 0.75rem; font-size: 0.9rem; }
.book-reader {
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 48rem;
}
.book-line { margin: 0 0 0.65rem; }
.book-line--blank { margin: 0 0 0.35rem; height: 0.35rem; }
.book-dialogue {
  margin-left: 0.85rem;
  color: color-mix(in srgb, var(--accent) 42%, var(--text));
}
.book-dialogue .book-word {
  color: inherit;
}
.book-word {
  display: inline;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
  border-radius: 2px;
}
.book-word:hover,
.book-word:focus-visible {
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  outline: none;
}
.book-word.book-word--saved {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent);
  text-underline-offset: 2px;
}
.book-word-tooltip {
  position: fixed;
  z-index: 40;
  max-width: min(16rem, calc(100vw - 1.5rem));
  padding: 0.4rem 0.65rem;
  border-radius: 8px;
  background: var(--text);
  color: var(--bg2);
  font-size: 0.9rem;
  line-height: 1.35;
  box-shadow: 0 6px 18px color-mix(in srgb, #000 25%, transparent);
  pointer-events: none;
}
.book-cover-preview-wrap { margin: 0.5rem 0 0; }
.book-cover-preview {
  width: 5rem;
  height: 7rem;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--line);
}

.book-edit-summary {
  gap: 0.85rem;
}
.book-edit-title {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.book-edit-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
  color: var(--muted);
}
.book-edit-toggle svg {
  width: 1.15rem;
  height: 1.15rem;
  display: block;
}
.book-edit-label {
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
}
.book-edit-summary:hover .book-edit-toggle {
  color: var(--accent);
}
@media (max-width: 720px) {
  .book-edit-label {
    display: none;
  }
}

.topic-texts-edit-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.topic-text-edit-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.85rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
}
.topic-text-edit-item:last-child { border-bottom: none; }
.topic-text-edit-item a {
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}
.topic-text-edit-item a:hover { color: var(--accent); }

.sentence-field {
  min-height: 3.2rem;
  resize: vertical;
  width: 100%;
  box-sizing: border-box;
  overflow: hidden;
  line-height: 1.45;
}
textarea.de-field.sentence-field {
  color: var(--text);
  border-color: var(--de-border);
  background: var(--input-bg);
}
textarea.ru-field.sentence-field {
  color: var(--ru);
  border-color: var(--ru-border);
  background: var(--input-bg);
}
.sentence-view {
  display: block;
  width: 100%;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.45;
}
.sentence-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.65rem;
  align-items: start;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
}
.sentence-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
  min-width: 0;
}
.sentence-lang {
  min-width: 0;
}
.sentence-actions {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  align-items: center;
  padding-top: 0.15rem;
}

.text-nav-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.75rem;
  margin: 0 0 0.35rem;
}
.text-nav-row .topic-author {
  margin: 0;
}

@media (max-width: 720px) {
  .sentence-row {
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }
  .sentence-body {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  .sentence-field,
  .sentence-view {
    font-size: 1rem;
    line-height: 1.5;
  }
  textarea.de-field.sentence-field {
    color: var(--text);
    border-color: var(--de-border);
    background: var(--de-soft);
  }
  textarea.ru-field.sentence-field {
    color: var(--ru);
    border-color: var(--ru-border);
    background: var(--ru-soft);
  }
  .sentence-view.de-field {
    background: var(--de-soft);
    border-color: var(--de-border);
    color: var(--text);
  }
  .sentence-view.ru-field {
    background: var(--ru-soft);
    border-color: var(--ru-border);
    color: var(--ru);
  }
  .sentence-actions {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: center;
    width: 100%;
    padding-top: 0.15rem;
  }
}

.topic-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-top: 1rem;
}
.topic-action-btn {
  min-width: 9rem;
  text-align: center;
  text-decoration: none;
}
.topic-action-btn:hover { text-decoration: none; }

.listen-card {
  margin-top: 1rem;
  text-align: center;
}
.listen-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.25rem 0 1.5rem;
  text-align: left;
}
.listen-side h2 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.35rem, 4vw, 2rem);
  line-height: 1.25;
  word-break: break-word;
}
.listen-controls {
  justify-content: center;
}
.profile-section-title {
  margin: 1.5rem 0 0.35rem;
  font-size: 1.1rem;
}
.profile-logout {
  margin: 1.25rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
}
.profile-logout .btn {
  width: 100%;
}
.profile-card .profile-fold {
  margin: 1rem 0 0;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--soft);
}
.profile-card .profile-fold + .profile-fold {
  margin-top: 0.75rem;
}
.profile-card .fold-body {
  padding: 0 1rem 1rem;
}
.profile-card .fold-body > .muted.tiny:first-child {
  margin-top: 0;
}
.profile-check {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  margin: 0.85rem 0 0.35rem;
  font-weight: 600;
  cursor: pointer;
}
.profile-check input {
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.15rem;
  flex-shrink: 0;
  accent-color: var(--accent);
}
@media (max-width: 640px) {
  .listen-pair {
    grid-template-columns: 1fr;
  }
}

.word-text {
  flex: 1;
  min-width: 0;
  padding: 0.85rem 1rem;
  border: 1px solid transparent;
  border-radius: 0;
  background: var(--soft);
  line-height: 1.35;
  word-break: break-word;
}
.de-field.word-text,
input.de-field {
  color: var(--text);
}
input.de-field {
  border-color: var(--de-border);
}
.word-text.de-field {
  background: var(--de-soft);
  border-color: var(--de-border);
}
.ru-field.word-text,
input.ru-field {
  color: var(--ru);
}
input.ru-field {
  border-color: var(--ru-border);
}
.word-text.ru-field {
  background: var(--ru-soft);
  border-color: var(--ru-border);
}
.learn-topic { padding-bottom: 2.5rem; }

.messenger-layout {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: calc(100vh - 5rem);
  gap: 1rem;
  padding-bottom: 1.5rem;
}
.messenger-messages {
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 42vh;
  max-height: 58vh;
  padding: 0.5rem;
}
.messenger-composer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 0.7rem;
  align-items: end;
}
.msg-meta {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.25rem;
  font-size: 0.78rem;
  color: var(--muted);
}
.msg-body {
  white-space: pre-wrap;
  word-break: break-word;
}
@media (max-width: 860px) {
  .composer.messenger-composer {
    grid-template-columns: auto minmax(5rem, 1fr);
    gap: 0.55rem;
  }
  .composer.messenger-composer .composer-input {
    grid-column: 1 / -1;
  }
  .composer.messenger-composer .mic-btn {
    width: 44px;
    height: 44px;
  }
  .composer.messenger-composer .btn {
    width: 100%;
    padding: 0.55rem 0.85rem;
    font-size: 0.88rem;
    min-height: 44px;
  }
}
@media (max-width: 720px) {
  .composer.messenger-composer {
    grid-template-columns: auto minmax(5rem, 1fr);
  }
}

.stats-page { padding-bottom: 2.5rem; }
.stats-filter {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 1rem;
  max-width: 28rem;
}
.stats-filter select { margin: 0; }
.table-wrap { overflow-x: auto; }
.stats-table th.num,
.stats-table td.num,
.stats-day-table th.num,
.stats-day-table td.num {
  text-align: right;
  white-space: nowrap;
  width: 7rem;
}
.stats-table td.actions { text-align: right; white-space: nowrap; }
.ok-num { color: var(--ok); font-weight: 700; }
.bad-num { color: var(--danger); font-weight: 700; }
.stats-detail td {
  background: var(--soft);
  padding: 0.85rem 0.75rem 1rem;
}
.stats-detail-box { max-width: 520px; }
.stats-day-table { margin: 0; }
.stats-row:hover td { background: var(--accent-soft); }

.guide-page { padding-bottom: 2.5rem; max-width: 760px; }
.guide-page .lead { max-width: 40rem; }
.guide-toc { margin: 1rem 0 1.25rem; }
.guide-toc ol {
  margin: 0.65rem 0 0;
  padding-left: 1.25rem;
  color: var(--muted);
  line-height: 1.7;
}
.guide-toc a { color: var(--accent); }
.guide-section {
  margin-bottom: 1rem;
  animation: rise .4s ease both;
}
.guide-section h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.01em;
}
.guide-section p,
.guide-section li {
  color: var(--muted);
  line-height: 1.55;
}
.guide-section p { margin: 0 0 0.75rem; }
.guide-section ul {
  margin: 0 0 0.85rem;
  padding-left: 1.2rem;
}
.guide-section li { margin-bottom: 0.35rem; }
.guide-section h3 {
  margin: 1rem 0 0.5rem;
  font-size: 1.05rem;
  color: var(--text);
  font-weight: 700;
}
.guide-steps {
  margin: 0 0 0.85rem;
  padding-left: 1.25rem;
  color: var(--muted);
  line-height: 1.55;
}
.guide-steps li { margin-bottom: 0.45rem; }
.guide-footer { margin: 1.5rem 0 0; font-size: 0.9rem; }

.quiz-card { min-height: 280px; }
.quiz-prompt-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0.5rem 0 1.25rem;
}
.quiz-prompt-row h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  letter-spacing: 0.01em;
}

.quiz-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.quiz-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  text-align: left;
  padding: 1rem 1.05rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease, transform .12s ease;
}
.quiz-option:hover:not(:disabled) {
  border-color: rgba(21, 101, 192, 0.5);
  transform: translateY(-1px);
}
.quiz-option:disabled { cursor: default; opacity: 0.85; }
.quiz-option.ok {
  border-color: rgba(74, 222, 128, 0.55);
  background: rgba(74, 222, 128, 0.12);
}
.quiz-option.bad {
  border-color: rgba(255, 107, 107, 0.55);
  background: rgba(255, 107, 107, 0.1);
}

.quiz-feedback {
  margin: 1rem 0 0;
  padding: 0.75rem 1rem;
  border-radius: 0;
  font-weight: 700;
}
.quiz-feedback.good {
  background: var(--alert-ok-bg);
  border: 1px solid var(--alert-ok-border);
  color: var(--alert-ok-fg);
}
.quiz-feedback.bad {
  background: var(--alert-bg);
  border: 1px solid var(--alert-border);
  color: var(--alert-fg);
}

.quiz-done, .quiz-empty {
  text-align: center;
  padding: 2rem 1.5rem;
}
.quiz-done h2, .quiz-empty h2 {
  font-family: var(--font-display);
  margin: 0 0 0.5rem;
}

@media (max-width: 720px) {
  .word-row,
  .word-row-inputs,
  .learn-edit[data-can-edit="0"] .word-row {
    grid-template-columns: 1fr;
    align-items: stretch;
  }
  .word-row-actions {
    justify-content: flex-start;
  }
  .icon-action {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 8px;
  }
  .icon-action .action-label {
    display: none;
  }
  .icon-action svg {
    width: 18px;
    height: 18px;
  }
  .quiz-options { grid-template-columns: 1fr; }
  .nav { flex-wrap: wrap; justify-content: flex-end; }
}

/* ——— Organizer calendar ——— */
.organizer-layout {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-bottom: 2rem;
}
.organizer-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}
.organizer-header h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  letter-spacing: 0.01em;
}
.organizer-header p { margin: 0.35rem 0 0; max-width: 36rem; }
.organizer-header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
#org-push-btn.is-active {
  border-color: rgba(22, 163, 74, 0.45);
  background: var(--alert-ok-bg);
  color: var(--alert-ok-fg);
}

.organizer-toolbar {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 0.75rem 1rem;
  overflow: visible;
}
.org-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.org-nav-btn {
  min-width: 2.5rem;
  padding-left: 0.6rem;
  padding-right: 0.6rem;
  font-size: 1.35rem;
  line-height: 1;
}
.org-period-label {
  margin: 0;
  text-align: center;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.5vw, 1.35rem);
  font-weight: 600;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.org-add-now {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 2.5rem;
  height: 2.5rem;
  margin: 0;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--btn-fg);
  font-family: inherit;
  font-size: 1.65rem;
  font-weight: 600;
  line-height: 1;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform .12s ease, filter .12s ease;
}
.org-add-now:hover {
  transform: scale(1.06);
  filter: brightness(1.05);
}
.org-view-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  justify-content: flex-end;
}
.org-view-btn.is-active {
  background: var(--accent-soft);
  border-color: transparent;
  color: var(--text);
  font-weight: 700;
}

.organizer-calendar {
  padding: 0.75rem;
  min-height: 280px;
  overflow: auto;
}

.org-chip {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  width: 100%;
  text-align: left;
  border: 1px solid var(--de-border);
  background: var(--de-soft);
  color: var(--text);
  border-radius: 0;
  padding: 0.35rem 0.5rem;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 0.3rem;
  transition: transform .12s ease, border-color .12s ease;
}
.org-chip:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}
.org-chip-time {
  flex: 0 0 auto;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 0.75rem;
}
.org-chip-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Week */
.org-week-view {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.4rem;
  min-width: 640px;
}
.org-week-col {
  display: flex;
  flex-direction: column;
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--soft);
  overflow: hidden;
}
.org-week-col.is-today {
  border-color: rgba(21, 101, 192, 0.45);
  background: var(--accent-soft);
}
.org-week-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  padding: 0.55rem 0.35rem;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
}
.org-week-wd {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 700;
}
.org-week-num {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
}
.org-week-body {
  flex: 1;
  padding: 0.4rem;
  cursor: pointer;
  min-height: 8rem;
}

/* Day */
.org-day-head {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 0.5rem;
}
.org-empty { margin: 0.5rem 0 1rem; }
.org-hour-grid {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.org-hour-row {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 0.5rem;
  align-items: stretch;
  border: 0;
  background: transparent;
  padding: 0;
  font: inherit;
  color: inherit;
  cursor: pointer;
  text-align: left;
}
.org-hour-label {
  padding-top: 0.45rem;
  font-size: 0.75rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}
.org-hour-slot {
  min-height: 2.4rem;
  border-radius: 0;
  border: 1px dashed var(--line);
  padding: 0.25rem;
  background: var(--soft);
}
.org-hour-row:hover .org-hour-slot {
  border-color: rgba(21, 101, 192, 0.45);
  background: var(--accent-soft);
}

/* Month */
.org-month-head,
.org-month-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.35rem;
}
.org-month-head {
  margin-bottom: 0.35rem;
}
.org-month-head > div {
  text-align: center;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 700;
  padding: 0.25rem;
}
.org-month-cell {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.25rem;
  min-height: 5.5rem;
  padding: 0.4rem;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--soft);
  color: inherit;
  font: inherit;
  cursor: pointer;
  text-align: left;
}
.org-month-cell.is-outside { opacity: 0.45; }
.org-month-cell.is-today {
  border-color: rgba(21, 101, 192, 0.5);
  background: var(--accent-soft);
}
.org-month-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
}
.org-month-chips {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  overflow: hidden;
}
.org-month-chip {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.15rem 0.3rem;
  border-radius: 0;
  background: var(--de-soft);
  border: 1px solid var(--de-border);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.org-month-more {
  font-size: 0.68rem;
  color: var(--muted);
  font-weight: 700;
}

/* Dialog */
.org-dialog {
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 0;
  background: var(--panel-strong);
  color: var(--text);
  box-shadow: var(--shadow);
  width: min(420px, calc(100vw - 1.5rem));
  max-height: calc(100vh - 2rem);
}
.org-dialog::backdrop {
  background: rgba(8, 16, 14, 0.45);
  backdrop-filter: blur(4px);
}
.org-dialog-form {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 1.25rem 1.25rem 1.1rem;
}
.org-dialog-form h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
}
.org-dialog-form label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
}
.org-dialog-form input,
.org-dialog-form textarea {
  font: inherit;
  font-weight: 500;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--input-bg);
  color: var(--text);
}
.org-dialog-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.25rem;
}
.org-dialog-spacer { flex: 1; }
.danger-text { color: var(--danger) !important; }
.org-mic-btn {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}
.org-mic-btn.listening {
  background: rgba(255, 107, 107, 0.2);
  border-color: rgba(255, 107, 107, 0.55);
}

@media (max-width: 860px) {
  .organizer-toolbar {
    grid-template-columns: 1fr auto;
    justify-items: stretch;
  }
  .org-nav { justify-content: space-between; grid-column: 1 / -1; }
  .org-period-label { text-align: left; }
  .org-add-now { grid-column: 2; grid-row: 2; }
  .org-view-switch { grid-column: 1 / -1; justify-content: stretch; }
  .org-view-switch .org-view-btn { flex: 1; }
  .organizer-calendar {
    margin-inline: -0.25rem;
    padding: 0.5rem;
  }
  .org-week-view {
    min-width: 0;
    grid-template-columns: 1fr;
  }
  .org-week-col { min-height: 0; }
  .org-week-body { min-height: 0; }
  .org-week-head {
    flex-direction: row;
    justify-content: space-between;
    padding: 0.65rem 0.85rem;
  }
  .org-month-cell { min-height: 4.2rem; padding: 0.3rem; }
  .org-month-chip { display: none; }
  .org-month-more { display: none; }
  .org-month-cell.has-items::after {
    content: "";
    width: 0.45rem;
    height: 0.45rem;
    border-radius: 0;
    background: var(--accent);
    align-self: flex-start;
    margin-top: auto;
  }
}

/* —— AI module (Gemini-like chat) —— */
.ai-app {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 0;
  width: 100vw;
  max-width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  min-height: calc(100vh - 4.2rem);
  border-top: 1px solid var(--line);
}
.ai-sidebar {
  display: flex;
  flex-direction: column;
  background: var(--panel-strong);
  border-right: 1px solid var(--line);
  padding: 0.85rem;
  gap: 0.75rem;
  min-height: 0;
}
.ai-sidebar-top {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.ai-new-chat {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
}
.ai-sidebar-close {
  display: none;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--text);
  cursor: pointer;
  font-size: 1.4rem;
  line-height: 1;
}
.ai-conv-list {
  overflow: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-height: 0;
}
.ai-empty-history { padding: 0.5rem; margin: 0; font-size: 0.9rem; }
.ai-conv-item {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 0.15rem;
  border: 1px solid transparent;
  background: transparent;
}
.ai-conv-item.active {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
}
.ai-conv-open {
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 0.55rem 0.6rem;
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font: inherit;
}
.ai-conv-rename,
.ai-conv-del {
  border: 0;
  background: transparent;
  color: var(--muted);
  width: 28px;
  height: 28px;
  cursor: pointer;
  font-size: 1rem;
}
.ai-conv-rename:hover,
.ai-conv-del:hover { color: var(--accent); }
.ai-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}
.ai-toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  backdrop-filter: blur(10px);
}
.ai-menu-btn { display: none; padding: 0.35rem 0.55rem; }
.ai-toolbar-title {
  font-weight: 600;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ai-model-label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  font-size: 0.9rem;
}
.ai-model-label select {
  margin: 0;
  min-width: 12rem;
  max-width: min(42vw, 22rem);
}
.ai-messages {
  flex: 1;
  overflow: auto;
  padding: 1.25rem 1rem 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.ai-empty {
  margin: auto;
  text-align: center;
  max-width: 36rem;
  padding: 1.5rem 1rem 2rem;
}
.ai-empty-mark {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.ai-empty h2 { margin: 0 0 0.4rem; font-family: var(--font-display); }
.ai-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  justify-content: center;
  margin-top: 1.1rem;
}
.ai-chip {
  border: 1px solid var(--line);
  background: var(--panel-strong);
  color: var(--text);
  padding: 0.65rem 0.9rem;
  cursor: pointer;
  font: inherit;
  max-width: 100%;
  text-align: left;
  box-shadow: var(--shadow);
}
.ai-chip:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  background: var(--accent-soft);
}
.ai-msg {
  width: min(760px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 0.35rem;
}
.ai-msg-meta {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.ai-msg-user .ai-msg-body {
  background: var(--bubble-user);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  padding: 0.85rem 1rem;
  white-space: pre-wrap;
  word-break: break-word;
}
.ai-msg-assistant .ai-msg-body {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  padding: 0.95rem 1.05rem;
  word-break: break-word;
  box-shadow: var(--shadow);
}
.ai-msg-body.streaming::after {
  content: "▍";
  animation: ai-blink 1s steps(1) infinite;
  margin-left: 2px;
  color: var(--accent);
}
@keyframes ai-blink { 50% { opacity: 0; } }
.ai-msg-body p { margin: 0 0 0.7rem; }
.ai-msg-body p:last-child { margin-bottom: 0; }
.ai-msg-body ul { margin: 0.4rem 0 0.7rem 1.1rem; padding: 0; }
.ai-msg-body pre {
  overflow: auto;
  background: var(--soft);
  border: 1px solid var(--line);
  padding: 0.7rem 0.8rem;
  margin: 0.6rem 0;
  font-size: 0.88rem;
}
.ai-msg-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}
.ai-msg-actions { display: flex; gap: 0.35rem; }
.ai-copy-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 0.15rem 0.3rem;
}
.ai-copy-btn:hover { color: var(--accent); }
.ai-composer {
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto 1rem;
  padding-top: 0.35rem;
}
.ai-composer-box {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
  align-items: end;
  padding: 0.65rem 0.7rem;
  margin: 0;
}
.ai-composer-box textarea {
  min-height: 44px;
  max-height: 180px;
  resize: none;
  margin: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  padding: 0.55rem 0.35rem;
  line-height: 1.45;
}
.ai-composer-box textarea:focus { outline: none; }
.ai-send {
  width: 44px;
  height: 44px;
  padding: 0;
  display: grid;
  place-items: center;
  border-radius: 8px;
}
.ai-hint {
  margin: 0.45rem 0 0;
  font-size: 0.78rem;
  text-align: center;
}
.ai-composer .status-line { min-height: 1.1rem; margin-top: 0.25rem; text-align: center; }
@media (max-width: 900px) {
  .ai-app { grid-template-columns: 1fr; }
  .ai-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: min(320px, 88vw);
    z-index: 50;
    transform: translateX(-105%);
    transition: transform .2s ease;
    box-shadow: var(--shadow);
  }
  .ai-sidebar.open { transform: translateX(0); }
  .ai-sidebar-close,
  .ai-menu-btn { display: inline-grid; place-items: center; }
  .ai-model-label span { display: none; }
}

/* AI image attachments */
.ai-attach-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 0.55rem;
}
.ai-thumb {
  position: relative;
  width: 72px;
  height: 72px;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  overflow: hidden;
}
.ai-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.ai-thumb-remove {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 22px;
  height: 22px;
  border: 0;
  background: rgba(0,0,0,.55);
  color: #fff;
  cursor: pointer;
  line-height: 1;
  font-size: 1rem;
}
.ai-composer-box {
  grid-template-columns: auto 1fr auto auto;
  align-items: end;
}
.ai-mic-btn {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}
.ai-attach-btn {
  width: 40px;
  height: 40px;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
}
.ai-attach-btn:hover { color: var(--accent); }
.ai-composer.ai-dragover .ai-composer-box {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.ai-msg-images {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.35rem;
}
.ai-msg-img {
  display: block;
  max-width: min(280px, 100%);
  border: 1px solid var(--line);
  background: var(--soft);
  padding: 0;
  cursor: zoom-in;
  font: inherit;
  color: inherit;
}
.ai-msg-img img {
  display: block;
  max-width: 100%;
  max-height: 280px;
  object-fit: contain;
}

.ai-lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(8, 12, 18, 0.88);
  display: grid;
  place-items: center;
  padding: 2.5rem 1rem 1rem;
  box-sizing: border-box;
}
.ai-lightbox-img {
  max-width: min(96vw, 1100px);
  max-height: calc(100vh - 4rem);
  object-fit: contain;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}
.ai-lightbox-close {
  position: fixed;
  top: 0.75rem;
  right: 0.75rem;
  z-index: 1001;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(20, 28, 40, 0.9);
  color: #fff;
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
}
.ai-lightbox-close:hover {
  background: rgba(40, 52, 70, 0.95);
}
body.ai-lightbox-open {
  overflow: hidden;
}