/* =================================================================
   Frenmot — Design System
   ================================================================= */

/* ---------- Tokens ---------- */
:root {
  /* Accent palettes — switched via [data-accent] */
  --accent-50:  #eef2ff;
  --accent-100: #e0e7ff;
  --accent-200: #c7d2fe;
  --accent-300: #a5b4fc;
  --accent-400: #818cf8;
  --accent-500: #6366f1;
  --accent-600: #4f46e5;
  --accent-700: #4338ca;
  --accent-800: #3730a3;
  --accent-900: #312e81;
  --accent-rgb: 99 102 241;

  /* Neutral scale (light mode default) */
  --bg:          #f7f8fb;
  --bg-elev:     #ffffff;
  --bg-elev-2:   #ffffff;
  --bg-soft:     #f1f3f8;
  --surface:     #ffffff;
  --surface-2:   #f8fafc;
  --border:      #e6e8ef;
  --border-strong:#d4d7e0;
  --text:        #0f172a;
  --text-muted:  #5b6478;
  --text-subtle: #8a93a6;
  --text-inverse:#ffffff;

  /* Semantic */
  --success: #10b981;
  --success-bg: #ecfdf5;
  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --danger:  #ef4444;
  --danger-bg: #fef2f2;
  --info:    #0ea5e9;
  --info-bg: #f0f9ff;

  /* Effects */
  --radius-sm: 8px;
  --radius:    14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06);
  --shadow:    0 6px 16px -8px rgba(15,23,42,.18), 0 2px 4px -2px rgba(15,23,42,.06);
  --shadow-lg: 0 24px 48px -16px rgba(15,23,42,.18), 0 8px 16px -8px rgba(15,23,42,.08);
  --shadow-accent: 0 12px 28px -12px rgb(var(--accent-rgb) / 0.55);

  /* Layout */
  --sidebar-w: 256px;
  --topbar-h:  64px;
  --bottom-nav-h: 64px;
  --content-max: 1200px;

  /* Motion */
  --ease: cubic-bezier(.16,1,.3,1);
  --t-fast: 120ms;
  --t-med:  220ms;
  --t-slow: 380ms;
}

/* Dark mode */
[data-theme="dark"] {
  --bg:          #0b1020;
  --bg-elev:     #0f1730;
  --bg-elev-2:   #131c3a;
  --bg-soft:     #0e1531;
  --surface:     #131c3a;
  --surface-2:   #182246;
  --border:      #243056;
  --border-strong:#2d3a66;
  --text:        #f1f5fb;
  --text-muted:  #aab1c4;
  --text-subtle: #8089a3;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
  --shadow:    0 8px 24px -8px rgba(0,0,0,.5), 0 2px 4px -2px rgba(0,0,0,.3);
  --shadow-lg: 0 24px 48px -16px rgba(0,0,0,.6), 0 8px 16px -8px rgba(0,0,0,.4);
  --success-bg: rgba(16,185,129,.12);
  --warning-bg: rgba(245,158,11,.12);
  --danger-bg:  rgba(239,68,68,.12);
  --info-bg:    rgba(14,165,233,.12);
}

/* Accent presets */
[data-accent="indigo"] { --accent-500:#6366f1; --accent-600:#4f46e5; --accent-700:#4338ca; --accent-100:#e0e7ff; --accent-50:#eef2ff; --accent-rgb:99 102 241; }
[data-accent="rose"]   { --accent-500:#f43f5e; --accent-600:#e11d48; --accent-700:#be123c; --accent-100:#ffe4e6; --accent-50:#fff1f2; --accent-rgb:244 63 94; }
[data-accent="emerald"]{ --accent-500:#10b981; --accent-600:#059669; --accent-700:#047857; --accent-100:#d1fae5; --accent-50:#ecfdf5; --accent-rgb:16 185 129; }
[data-accent="amber"]  { --accent-500:#f59e0b; --accent-600:#d97706; --accent-700:#b45309; --accent-100:#fef3c7; --accent-50:#fffbeb; --accent-rgb:245 158 11; }
[data-accent="sky"]    { --accent-500:#0ea5e9; --accent-600:#0284c7; --accent-700:#0369a1; --accent-100:#e0f2fe; --accent-50:#f0f9ff; --accent-rgb:14 165 233; }
[data-accent="violet"] { --accent-500:#8b5cf6; --accent-600:#7c3aed; --accent-700:#6d28d9; --accent-100:#ede9fe; --accent-50:#f5f3ff; --accent-rgb:139 92 246; }

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background var(--t-med) ease, color var(--t-med) ease;
}
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; padding: 0; }
a { color: var(--accent-600); text-decoration: none; }
a:hover { text-decoration: underline; }
::selection { background: rgb(var(--accent-rgb) / 0.25); color: var(--text); }
[hidden] { display: none !important; }
.muted { color: var(--text-muted); font-weight: 400; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 10px;
  border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover { background: var(--text-subtle); }

/* ---------- Typography ---------- */
.font-display { font-family: 'Fraunces', Georgia, serif; }
h1, h2, h3, h4 { margin: 0; line-height: 1.2; color: var(--text); }
h1 { font-size: 1.75rem; font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: 1.35rem; font-weight: 700; letter-spacing: -0.01em; }
h3 { font-size: 1.1rem;  font-weight: 700; }
h4 { font-size: 0.95rem; font-weight: 700; }
.eyebrow {
  font-size: 11px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent-600);
}

/* ---------- Icons ---------- */
.icon { width: 20px; height: 20px; flex: none; }
.icon-lg { width: 28px; height: 28px; }
.icon-sm { width: 16px; height: 16px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 10px 16px;
  font-size: 14px; font-weight: 600;
  border-radius: 12px;
  border: 1px solid transparent;
  background: var(--surface);
  color: var(--text);
  transition: background var(--t-fast), color var(--t-fast),
              border-color var(--t-fast), transform var(--t-fast),
              box-shadow var(--t-fast);
  white-space: nowrap;
  user-select: none;
}
.btn:hover { background: var(--surface-2); border-color: var(--border); }
.btn:active { transform: translateY(1px); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .5; cursor: not-allowed; pointer-events: none; }
.btn .icon { width: 16px; height: 16px; }

.btn-primary {
  background: var(--accent-600);
  color: #fff;
  border-color: var(--accent-600);
  box-shadow: var(--shadow-accent);
}
.btn-primary:hover { background: var(--accent-700); border-color: var(--accent-700); }

.btn-secondary {
  background: rgb(var(--accent-rgb) / 0.10);
  color: var(--accent-600);
  border-color: rgb(var(--accent-rgb) / 0.20);
}
.btn-secondary:hover { background: rgb(var(--accent-rgb) / 0.18); }
[data-theme="dark"] .btn-secondary { color: var(--accent-300); }

.btn-ghost { background: transparent; }
.btn-ghost:hover { background: var(--surface-2); }

.btn-outline { background: transparent; border-color: var(--border-strong); color: var(--text); }
.btn-outline:hover { background: var(--surface-2); border-color: var(--text-subtle); }

.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { background: #dc2626; }

.btn-sm { padding: 6px 12px; font-size: 13px; border-radius: 9px; }
.btn-lg { padding: 14px 22px; font-size: 15px; border-radius: 14px; }
.btn-block { width: 100%; }

.icon-btn {
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 10px;
  color: var(--text-muted);
  background: transparent;
  position: relative;
  transition: background var(--t-fast), color var(--t-fast);
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

/* ---------- Forms ---------- */
.field { display: flex; flex-direction: column; gap: 6px; }
.field-label {
  font-size: 12px; font-weight: 600;
  color: var(--text-muted); letter-spacing: .02em;
}
.input, .textarea, .select,
input[type="text"], input[type="email"], input[type="password"],
input[type="number"], input[type="search"], input[type="time"],
input[type="url"], textarea, select {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  transition: border-color var(--t-fast), box-shadow var(--t-fast), background var(--t-fast);
  font-family: inherit;
}
textarea { resize: vertical; min-height: 80px; line-height: 1.5; }
.input:focus, .textarea:focus, .select:focus,
input:focus, textarea:focus, select:focus {
  border-color: var(--accent-500);
  box-shadow: 0 0 0 4px rgb(var(--accent-rgb) / 0.15);
}
input::placeholder, textarea::placeholder { color: var(--text-subtle); }
select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='%238a93a6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* Toggle switch */
.switch { position: relative; width: 42px; height: 24px; display: inline-block; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch .track {
  position: absolute; inset: 0;
  background: var(--border-strong);
  border-radius: 999px;
  transition: background var(--t-fast);
}
.switch .track::before {
  content: "";
  position: absolute;
  width: 18px; height: 18px;
  left: 3px; top: 3px;
  background: #fff;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  transition: transform var(--t-fast);
}
.switch input:checked + .track { background: var(--accent-600); }
.switch input:checked + .track::before { transform: translateX(18px); }

/* Segmented control */
.segmented {
  display: inline-flex;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 3px;
  gap: 2px;
}
.segmented button {
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: 8px;
  transition: all var(--t-fast);
}
.segmented button:hover { color: var(--text); }
.segmented button[aria-pressed="true"] {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

/* ---------- Cards ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast), transform var(--t-fast);
}
.card-hover:hover { border-color: var(--border-strong); box-shadow: var(--shadow); }
.card-pad-sm { padding: 14px; }
.card-pad-lg { padding: 28px; }

.section-title {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px;
}
.section-title h2 { font-size: 1.05rem; }

/* ---------- Badges / Tags ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 9px;
  font-size: 11.5px;
  font-weight: 600;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.badge-accent  { background: rgb(var(--accent-rgb)/0.12); color: var(--accent-600); border-color: transparent; }
.badge-success { background: var(--success-bg); color: var(--success); border-color: transparent; }
.badge-warning { background: var(--warning-bg); color: var(--warning); border-color: transparent; }
.badge-danger  { background: var(--danger-bg);  color: var(--danger);  border-color: transparent; }
.badge-info    { background: var(--info-bg);    color: var(--info);    border-color: transparent; }
[data-theme="dark"] .badge-accent  { color: var(--accent-300); }

.tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px;
  font-size: 11.5px;
  font-weight: 500;
  background: rgb(var(--accent-rgb)/0.10);
  color: var(--accent-600);
  border-radius: 6px;
}
[data-theme="dark"] .tag { color: var(--accent-300); }

/* ---------- Layout: Auth ---------- */
.auth-screen {
  position: fixed; inset: 0;
  display: grid; place-items: center;
  background:
    radial-gradient(circle at 15% 0%,  rgb(var(--accent-rgb)/.18), transparent 50%),
    radial-gradient(circle at 100% 100%, rgb(var(--accent-rgb)/.12), transparent 50%),
    var(--bg);
  padding: 20px;
  z-index: 1000;
}
.auth-card {
  width: 100%; max-width: 440px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
  animation: fadeUp .5s var(--ease) both;
}
.auth-logo {
  width: 72px; height: 72px;
  margin: 0 auto 14px;
  border-radius: 18px; overflow: hidden;
  background: var(--accent-100);
  display: grid; place-items: center;
  box-shadow: var(--shadow-accent);
}
.auth-logo img { width: 100%; height: 100%; object-fit: cover; }
.auth-eyebrow {
  text-align: center;
  font-size: 11px; font-weight: 700; letter-spacing: .25em;
  text-transform: uppercase; color: var(--accent-600);
  margin-bottom: 6px;
}
.auth-title {
  text-align: center;
  font-family: 'Fraunces', Georgia, serif;
  font-size: 2rem; font-weight: 800;
  margin-bottom: 6px;
}
.auth-sub {
  text-align: center;
  font-size: 14px; color: var(--text-muted);
  margin: 0 auto 24px; max-width: 340px;
}
.auth-form { display: flex; flex-direction: column; gap: 14px; margin-bottom: 16px; }
.auth-footnote {
  text-align: center;
  font-size: 12px; color: var(--text-subtle);
  margin: 0;
}

/* ---------- Layout: App Shell ---------- */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-areas:
    "sidebar topbar"
    "sidebar main";
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  grid-area: sidebar;
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: 18px 14px;
  gap: 14px;
  position: sticky; top: 0;
  height: 100vh;
  z-index: 30;
}
.sidebar-brand {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 8px 14px;
  font-family: 'Fraunces', Georgia, serif;
  font-size: 22px; font-weight: 800;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.sidebar-brand img { width: 32px; height: 32px; border-radius: 8px; }
.sidebar-nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text-muted);
  font-size: 14px; font-weight: 600;
  text-decoration: none;
  transition: background var(--t-fast), color var(--t-fast);
}
.nav-item:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.nav-item .icon { color: currentColor; }
.nav-item.active {
  background: rgb(var(--accent-rgb)/0.10);
  color: var(--accent-600);
}
[data-theme="dark"] .nav-item.active { color: var(--accent-300); }
.nav-badge {
  margin-left: auto;
  font-size: 11px; font-weight: 700;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-muted);
  min-width: 22px; text-align: center;
}
.nav-badge-due { background: var(--danger-bg); color: var(--danger); }
.nav-badge-due[data-zero="true"] { background: var(--surface-2); color: var(--text-subtle); }

.sidebar-footer { margin-top: auto; padding-top: 12px; border-top: 1px solid var(--border); }
.profile-btn {
  display: flex; align-items: center; gap: 10px;
  width: 100%;
  padding: 8px 8px;
  border-radius: 12px;
  text-align: left;
  transition: background var(--t-fast);
}
.profile-btn:hover { background: var(--surface-2); }
.avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--accent-600); color: #fff;
  font-weight: 700; font-size: 14px;
  flex: none;
}
.profile-info { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.profile-name { font-size: 13.5px; font-weight: 700; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.profile-meta { font-size: 11.5px; color: var(--text-subtle); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.profile-btn .icon { color: var(--text-subtle); }

/* Topbar */
.topbar {
  grid-area: topbar;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 14px;
  padding: 0 24px;
  height: var(--topbar-h);
  position: sticky; top: 0;
  z-index: 25;
}
.topbar-menu { display: none; }
.topbar-brand {
  display: none;
  align-items: center; gap: 8px;
  font-family: 'Fraunces', Georgia, serif;
  font-size: 18px; font-weight: 800;
}
.topbar-brand img { width: 26px; height: 26px; border-radius: 6px; }
.topbar-search {
  flex: 1; max-width: 520px;
  position: relative;
  display: flex; align-items: center;
}
.topbar-search .icon { position: absolute; left: 12px; color: var(--text-subtle); }
.topbar-search input {
  width: 100%;
  padding: 9px 12px 9px 38px;
  background: var(--surface-2);
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 13.5px;
}
.topbar-search input:focus { background: var(--surface); border-color: var(--accent-500); }
.topbar-search kbd {
  position: absolute; right: 10px;
  font-family: inherit; font-size: 11px; font-weight: 600;
  color: var(--text-subtle);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 6px;
}
.topbar-actions { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.streak-pill {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 12px;
  background: linear-gradient(135deg, #ffedd5, #fed7aa);
  color: #9a3412;
  border-radius: 999px;
  font-weight: 700; font-size: 13px;
  border: 1px solid #fdba74;
  cursor: pointer;
}
[data-theme="dark"] .streak-pill {
  background: linear-gradient(135deg, rgba(249,115,22,.2), rgba(234,88,12,.25));
  color: #fdba74;
  border-color: rgba(249,115,22,.4);
}
.streak-flame { font-size: 14px; line-height: 1; }
.icon-btn .dot {
  position: absolute; top: 8px; right: 8px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--danger);
  border: 2px solid var(--bg-elev);
}
.icon-sun, .icon-moon { transition: opacity var(--t-fast), transform var(--t-fast); }
[data-theme="light"] .icon-sun { opacity: 0; transform: scale(.5); position: absolute; }
[data-theme="light"] .icon-moon { opacity: 1; }
[data-theme="dark"]  .icon-moon { opacity: 0; transform: scale(.5); position: absolute; }
[data-theme="dark"]  .icon-sun  { opacity: 1; }

/* Main content */
.main {
  grid-area: main;
  padding: 28px 32px 60px;
  max-width: 100%;
  overflow-x: hidden;
}
.view {
  max-width: var(--content-max);
  margin: 0 auto;
  animation: fadeUp .35s var(--ease) both;
}
.view-header {
  display: flex; align-items: center; gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.view-header h1 { font-size: 1.6rem; }
.view-header .subtitle { color: var(--text-muted); margin-top: 4px; font-size: 14px; }
.view-header .actions { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }

/* Bottom nav (mobile) */
.bottom-nav {
  display: none;
  position: fixed; bottom: 0; left: 0; right: 0;
  height: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  z-index: 30;
  justify-content: space-around;
  align-items: stretch;
}
.bnav-item {
  flex: 1;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 2px;
  font-size: 10.5px; font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  position: relative;
}
.bnav-item:hover { text-decoration: none; color: var(--text); }
.bnav-item.active { color: var(--accent-600); }
[data-theme="dark"] .bnav-item.active { color: var(--accent-300); }
.bnav-badge {
  position: absolute;
  top: 6px; left: 50%;
  transform: translateX(4px);
  background: var(--danger);
  color: #fff;
  font-size: 9.5px; font-weight: 700;
  padding: 1px 5px;
  border-radius: 999px;
  min-width: 16px; text-align: center;
}

/* ---------- Stats / Dashboard ---------- */
.stat-grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  position: relative;
  overflow: hidden;
}
.stat-card .stat-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: rgb(var(--accent-rgb)/0.12);
  color: var(--accent-600);
  margin-bottom: 10px;
}
[data-theme="dark"] .stat-card .stat-icon { color: var(--accent-300); }
.stat-card .stat-label {
  font-size: 12px; font-weight: 600;
  color: var(--text-muted); letter-spacing: .02em;
}
.stat-card .stat-value {
  font-size: 1.75rem; font-weight: 800;
  color: var(--text); line-height: 1.1;
  margin-top: 2px;
  font-family: 'Fraunces', Georgia, serif;
}
.stat-card .stat-trend {
  font-size: 12px; font-weight: 600;
  margin-top: 6px;
}
.stat-trend.up   { color: var(--success); }
.stat-trend.down { color: var(--danger); }

.progress-bar {
  height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden;
}
.progress-bar > span {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--accent-500), var(--accent-700));
  border-radius: 999px;
  transition: width .5s var(--ease);
}

/* ---------- Vocabulary list ---------- */
.vocab-toolbar {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-bottom: 18px;
  align-items: center;
}
.vocab-toolbar .search-wrap {
  flex: 1; min-width: 220px;
  position: relative;
}
.vocab-toolbar .search-wrap .icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-subtle); }
.vocab-toolbar .search-wrap input { padding-left: 38px; }

.vocab-grid {
  display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.vocab-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex; flex-direction: column; gap: 8px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast), transform var(--t-fast);
  cursor: pointer;
}
.vocab-card:hover { border-color: rgb(var(--accent-rgb)/0.4); box-shadow: var(--shadow); transform: translateY(-1px); }
.vocab-head { display: flex; align-items: flex-start; gap: 8px; }
.vocab-word {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.25rem; font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  flex: 1;
}
.vocab-translation {
  color: var(--text-muted);
  font-size: 14px;
  font-style: italic;
}
.vocab-card .meta {
  display: flex; flex-wrap: wrap; gap: 6px;
  align-items: center;
  font-size: 11.5px;
  color: var(--text-subtle);
  margin-top: 4px;
}
.vocab-card .definition {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.difficulty-dots { display: inline-flex; gap: 3px; }
.difficulty-dots span {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--border-strong);
}
.difficulty-dots span.on { background: var(--accent-500); }

/* Empty states */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.empty-state .icon-wrap {
  width: 64px; height: 64px;
  margin: 0 auto 14px;
  border-radius: 16px;
  background: rgb(var(--accent-rgb)/0.12);
  color: var(--accent-600);
  display: grid; place-items: center;
}
.empty-state h3 { margin-bottom: 6px; }
.empty-state p { color: var(--text-muted); margin: 0 auto 18px; max-width: 380px; }

/* ---------- Modals ---------- */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(15,23,42,.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: grid; place-items: center;
  z-index: 100;
  padding: 16px;
  animation: fadeIn .2s var(--ease);
}
.modal {
  width: 100%; max-width: 520px;
  max-height: 90vh; overflow: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 26px;
  box-shadow: var(--shadow-lg);
  animation: scaleIn .25s var(--ease);
}
.modal-lg { max-width: 720px; }
.modal-header {
  display: flex; align-items: flex-start; gap: 12px;
  margin-bottom: 18px;
}
.modal-header h2 { flex: 1; }
.modal-close {
  width: 32px; height: 32px; border-radius: 8px;
  display: grid; place-items: center;
  color: var(--text-muted);
}
.modal-close:hover { background: var(--surface-2); color: var(--text); }
.modal-body { display: flex; flex-direction: column; gap: 14px; }
.modal-footer { margin-top: 18px; display: flex; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }

/* ---------- Toast ---------- */
#toast-root {
  position: fixed; bottom: 20px; right: 20px;
  display: flex; flex-direction: column-reverse; gap: 8px;
  z-index: 200;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-500);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 13.5px;
  box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 10px;
  min-width: 240px; max-width: 360px;
  animation: slideInRight .25s var(--ease);
}
.toast.success { border-left-color: var(--success); }
.toast.warning { border-left-color: var(--warning); }
.toast.error   { border-left-color: var(--danger); }
.toast .icon-circle {
  width: 28px; height: 28px; border-radius: 50%;
  display: grid; place-items: center;
  flex: none;
  background: rgb(var(--accent-rgb)/.15);
  color: var(--accent-600);
}
.toast.success .icon-circle { background: var(--success-bg); color: var(--success); }
.toast.warning .icon-circle { background: var(--warning-bg); color: var(--warning); }
.toast.error   .icon-circle { background: var(--danger-bg);  color: var(--danger); }

/* ---------- Chat ---------- */
.chat-shell {
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 0;
  height: calc(100vh - var(--topbar-h) - 56px);
  max-height: 800px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.chat-messages {
  padding: 24px;
  overflow-y: auto;
  display: flex; flex-direction: column; gap: 14px;
}
.chat-empty {
  margin: auto; text-align: center; max-width: 480px;
}
.chat-empty .pulse {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-500), var(--accent-700));
  margin: 0 auto 16px;
  display: grid; place-items: center;
  color: #fff;
  box-shadow: var(--shadow-accent);
}
.suggested-grid {
  margin-top: 18px;
  display: grid; gap: 8px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}
.suggested-chip {
  padding: 10px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 13px;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition: all var(--t-fast);
}
.suggested-chip:hover { border-color: var(--accent-500); background: rgb(var(--accent-rgb)/.06); }

.msg { display: flex; gap: 10px; animation: fadeUp .25s var(--ease); }
.msg-user { justify-content: flex-end; }
.msg-bubble {
  max-width: 80%;
  padding: 12px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.msg-assistant .msg-bubble {
  background: var(--surface-2);
  color: var(--text);
  border-bottom-left-radius: 4px;
}
.msg-user .msg-bubble {
  background: var(--accent-600);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.msg-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-500), var(--accent-700));
  color: #fff;
  display: grid; place-items: center;
  font-weight: 700; font-size: 12px;
  flex: none;
}
.msg-bubble code, .msg-bubble pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
}
.msg-bubble pre {
  background: rgba(0,0,0,.06);
  padding: 8px 10px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 6px 0;
}
.msg-user .msg-bubble pre { background: rgba(255,255,255,.18); }
.msg-action-result {
  margin-top: 10px;
  padding: 10px 12px;
  background: rgb(var(--accent-rgb)/.10);
  border: 1px dashed rgb(var(--accent-rgb)/.4);
  border-radius: 10px;
  font-size: 12.5px;
  color: var(--accent-700);
}
[data-theme="dark"] .msg-action-result { color: var(--accent-300); }
.typing { display: inline-flex; gap: 3px; padding: 6px 0; }
.typing span {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--text-subtle);
  animation: bounce 1.2s infinite;
}
.typing span:nth-child(2) { animation-delay: .15s; }
.typing span:nth-child(3) { animation-delay: .3s; }
.chat-composer {
  padding: 14px;
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
  display: flex; gap: 10px; align-items: flex-end;
}
.chat-composer textarea {
  flex: 1;
  min-height: 44px; max-height: 160px;
  resize: none;
  border-radius: 12px;
  background: var(--surface);
}
.chat-send {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--accent-600);
  color: #fff;
  display: grid; place-items: center;
  flex: none;
  transition: background var(--t-fast), transform var(--t-fast);
}
.chat-send:hover { background: var(--accent-700); }
.chat-send:disabled { opacity: .5; cursor: not-allowed; }

/* ---------- Flashcards / Practice ---------- */
.practice-shell {
  display: flex; flex-direction: column;
  gap: 18px;
  align-items: center;
}
.flashcard {
  width: 100%; max-width: 540px;
  aspect-ratio: 4/3;
  perspective: 1200px;
  cursor: pointer;
}
.flashcard-inner {
  position: relative;
  width: 100%; height: 100%;
  transition: transform .55s var(--ease);
  transform-style: preserve-3d;
}
.flashcard.flipped .flashcard-inner { transform: rotateY(180deg); }
.flashcard-face {
  position: absolute; inset: 0;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 24px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 10px;
  text-align: center;
  box-shadow: var(--shadow);
}
.flashcard-face.back { transform: rotateY(180deg); }
.flashcard-word {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--text);
}
.flashcard-trans { font-size: 1.25rem; color: var(--text-muted); font-style: italic; }
.flashcard-hint { font-size: 12px; color: var(--text-subtle); margin-top: auto; }
.flashcard-controls { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.confidence-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; width: 100%; max-width: 540px; }
.confidence-btn {
  padding: 12px 8px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  display: flex; flex-direction: column; align-items: center;
  gap: 4px;
  font-size: 12.5px; font-weight: 600;
  color: var(--text);
  transition: all var(--t-fast);
}
.confidence-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.confidence-btn .label-strong { font-size: 14px; font-weight: 800; }
.confidence-btn .interval { color: var(--text-subtle); font-size: 11px; }
.confidence-btn[data-grade="0"] { color: var(--danger); border-color: var(--danger-bg); }
.confidence-btn[data-grade="1"] { color: var(--warning); border-color: var(--warning-bg); }
.confidence-btn[data-grade="2"] { color: var(--info); border-color: var(--info-bg); }
.confidence-btn[data-grade="3"] { color: var(--success); border-color: var(--success-bg); }

.quiz-options { display: grid; gap: 10px; max-width: 540px; width: 100%; }
.quiz-option {
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: left;
  font-size: 14px; font-weight: 500;
  transition: all var(--t-fast);
  display: flex; align-items: center; gap: 10px;
}
.quiz-option:hover { border-color: var(--accent-500); background: rgb(var(--accent-rgb)/.04); }
.quiz-option .marker {
  width: 26px; height: 26px;
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--text-muted);
  display: grid; place-items: center;
  font-size: 12px; font-weight: 700;
}
.quiz-option.correct { border-color: var(--success); background: var(--success-bg); }
.quiz-option.wrong   { border-color: var(--danger);  background: var(--danger-bg); }

/* ---------- API integrations cards ---------- */
.provider-card {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color var(--t-fast);
}
.provider-card.active { border-color: var(--accent-500); box-shadow: 0 0 0 3px rgb(var(--accent-rgb)/.12); }
.provider-logo {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  display: grid; place-items: center;
  font-weight: 700; color: var(--text);
  flex: none;
  font-size: 16px;
}
.provider-info { flex: 1; min-width: 0; }
.provider-info h3 { display: flex; align-items: center; gap: 8px; }
.provider-info p { color: var(--text-muted); font-size: 13px; margin: 4px 0 10px; }
.provider-actions { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }

/* ---------- PDF view ---------- */
.pdf-shell {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.pdf-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex; flex-direction: column;
  height: calc(100vh - var(--topbar-h) - 90px);
  min-height: 480px;
}
.pdf-drop {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  margin: auto;
  width: 100%;
  transition: all var(--t-fast);
  cursor: pointer;
}
.pdf-drop.dragover { border-color: var(--accent-500); background: rgb(var(--accent-rgb)/.05); }
.pdf-drop .icon-wrap {
  width: 60px; height: 60px;
  margin: 0 auto 14px;
  border-radius: 16px;
  background: rgb(var(--accent-rgb)/.12);
  color: var(--accent-600);
  display: grid; place-items: center;
}
.pdf-text-view {
  flex: 1; overflow-y: auto;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  font-size: 13px; line-height: 1.6;
  color: var(--text);
  white-space: pre-wrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.pdf-toolbar { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; align-items: center; }
.pdf-doc-meta { font-size: 12px; color: var(--text-muted); margin-right: auto; }

/* ---------- Misc ---------- */
.divider { height: 1px; background: var(--border); margin: 20px 0; }
.row { display: flex; gap: 8px; align-items: center; }
.row-between { display: flex; gap: 8px; align-items: center; justify-content: space-between; }
.col { display: flex; flex-direction: column; gap: 8px; }
.gap-4 { gap: 4px; } .gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; } .gap-20 { gap: 20px; }
.mt-8{margin-top:8px;} .mt-12{margin-top:12px;} .mt-16{margin-top:16px;} .mt-20{margin-top:20px;} .mt-24{margin-top:24px;}
.mb-8{margin-bottom:8px;} .mb-12{margin-bottom:12px;} .mb-16{margin-bottom:16px;} .mb-20{margin-bottom:20px;} .mb-24{margin-bottom:24px;}
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 12.5px; }
.text-xs { font-size: 11.5px; }
.text-lg { font-size: 16px; }
.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }
.shrink-0 { flex-shrink: 0; }

/* ---------- Animations ---------- */
@keyframes fadeIn   { from{opacity:0} to{opacity:1} }
@keyframes fadeUp   { from{opacity:0; transform:translateY(8px)} to{opacity:1; transform:translateY(0)} }
@keyframes scaleIn  { from{opacity:0; transform:scale(.96)} to{opacity:1; transform:scale(1)} }
@keyframes slideInRight { from{opacity:0; transform:translateX(20px)} to{opacity:1; transform:translateX(0)} }
@keyframes bounce { 0%,80%,100%{transform:scale(.8); opacity:.5} 40%{transform:scale(1.1); opacity:1} }
@keyframes spin { to { transform: rotate(360deg); } }
.spinner {
  width: 18px; height: 18px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--accent-600);
  border-radius: 50%;
  animation: spin .9s linear infinite;
  display: inline-block;
}
.spinner-lg { width: 28px; height: 28px; border-width: 3px; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  :root { --sidebar-w: 0px; }
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-areas:
      "topbar"
      "main";
  }
  .sidebar {
    position: fixed; left: 0; top: 0; bottom: 0;
    width: 280px; height: 100vh;
    transform: translateX(-100%);
    transition: transform .25s var(--ease);
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-backdrop {
    position: fixed; inset: 0;
    background: rgba(0,0,0,.4);
    z-index: 29;
    animation: fadeIn .2s var(--ease);
  }
  .topbar-menu { display: inline-flex; }
  .topbar-brand { display: flex; }
  .topbar-search { max-width: none; display: none; }
  .topbar-search.show { display: flex; }
  .bottom-nav { display: flex; }
  .main { padding: 18px 14px calc(var(--bottom-nav-h) + 30px); }
  .pdf-shell { grid-template-columns: 1fr; }
  .pdf-panel { height: auto; min-height: 420px; }
  .chat-shell { height: calc(100vh - var(--topbar-h) - var(--bottom-nav-h) - 24px); border-radius: var(--radius); }
  .view-header h1 { font-size: 1.4rem; }
}

@media (max-width: 540px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .vocab-grid { grid-template-columns: 1fr; }
  .confidence-row { grid-template-columns: repeat(2, 1fr); }
  .auth-card { padding: 28px 22px; border-radius: 22px; }
  .modal { padding: 20px; border-radius: 22px; }
}

/* Print / accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}


/* =================================================================
   Frenmot — extensions: i18n, accents, conjugation, PDF redesign,
   profile menu, modal form footer.
   ================================================================= */

/* ---------- Topbar language toggle ---------- */
.lang-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 38px; height: 32px; padding: 0 10px;
  border-radius: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 12px; font-weight: 700; letter-spacing: .04em;
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}
.lang-toggle:hover {
  background: rgb(var(--accent-rgb)/0.10);
  border-color: rgb(var(--accent-rgb)/0.35);
  color: var(--accent-600);
}
[data-theme="dark"] .lang-toggle:hover { color: var(--accent-300); }

/* ---------- Profile pop-up menu ---------- */
.profile-menu {
  position: fixed;
  z-index: 90;
  min-width: 200px;
  padding: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column; gap: 2px;
  animation: fadeUp .15s var(--ease) both;
}
.profile-menu-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  color: var(--text);
  font-size: 13.5px; font-weight: 600;
  text-align: left;
  background: transparent;
  transition: background var(--t-fast), color var(--t-fast);
  cursor: pointer;
}
.profile-menu-item:hover { background: var(--surface-2); }
.profile-menu-item.danger { color: var(--danger); }
.profile-menu-item.danger:hover { background: var(--danger-bg); }
.profile-menu-item .icon { width: 16px; height: 16px; flex: none; }

/* ---------- Accent letter popup ---------- */
.accent-bar {
  display: flex; flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 6px;
  padding: 6px 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  animation: fadeIn .15s var(--ease);
  position: relative;
  z-index: 5;
}
.accent-chip {
  min-width: 30px; height: 30px;
  padding: 0 6px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid transparent;
  color: var(--text);
  font-family: 'Fraunces', Georgia, serif;
  font-size: 16px; font-weight: 600;
  line-height: 1;
  transition: background var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
  cursor: pointer;
  user-select: none;
}
.accent-chip:hover { background: rgb(var(--accent-rgb)/0.12); border-color: rgb(var(--accent-rgb)/0.3); transform: translateY(-1px); }
.accent-chip:active { transform: translateY(0); }
.accent-close {
  margin-left: auto;
  width: 30px; height: 30px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 6px;
  color: var(--text-subtle);
  font-size: 18px; font-weight: 600;
  background: transparent;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--t-fast), color var(--t-fast);
}
.accent-close:hover { background: var(--surface-2); color: var(--text); }

/* ---------- Conjugation view ---------- */
.conj-grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.conj-card { padding: 16px; }
.conj-card .eyebrow { margin-bottom: 8px; }
.conj-list {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 4px;
}
.conj-list li {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 14px;
  color: var(--text);
  line-height: 1.45;
  padding: 4px 0;
  border-bottom: 1px dashed var(--border);
}
.conj-list li:last-child { border-bottom: none; }
@media (max-width: 540px) { .conj-grid { grid-template-columns: 1fr; } }

/* ---------- Modal form footer (vocab/word) ---------- */
.modal-form-footer {
  border-top: 1px solid var(--border);
  padding-top: 14px;
}
@media (max-width: 540px) {
  .modal-form-footer { flex-direction: column-reverse; align-items: stretch; }
  .modal-form-footer .row { width: 100%; justify-content: flex-end; }
  .modal-form-footer .btn { flex: 1; }
}

/* ---------- PDF panel layout polish ---------- */
.pdf-panel-right {
  gap: 18px;
  padding: 22px;
}
@media (max-width: 540px) {
  .pdf-panel-right { padding: 16px; gap: 14px; }
}
.pdf-doc-list { overflow-y: auto; flex: 1; }
.pdf-preview {
  margin-top: 14px;
  max-height: 40vh;
  padding: 16px;
  line-height: 1.65;
}

.pdf-toolbar {
  display: flex; flex-wrap: wrap; gap: 8px;
  align-items: center;
  margin-bottom: 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

/* ---------- Summary card ---------- */
.pdf-summary-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent-500);
  border-radius: var(--radius);
  padding: 20px 22px;
  display: flex; flex-direction: column;
  gap: 14px;
  animation: fadeUp .25s var(--ease);
}
@media (max-width: 540px) { .pdf-summary-card { padding: 16px; } }

.pdf-summary-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap;
}
.pdf-summary-title { display: flex; flex-direction: column; gap: 4px; }
.pdf-summary-title .eyebrow { color: var(--accent-600); }
[data-theme="dark"] .pdf-summary-title .eyebrow { color: var(--accent-300); }
.pdf-summary-controls { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.pdf-summary-controls .btn-sm { padding: 6px 10px; }
.pdf-summary-close {
  width: 32px; height: 32px;
  border-radius: 8px;
  color: var(--text-muted);
}
.pdf-summary-close:hover { background: var(--surface-2); color: var(--danger); }

.pdf-summary-body { padding-top: 4px; }
.pdf-summary-content {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text);
  white-space: pre-wrap;
  word-wrap: break-word;
  padding: 6px 2px;
}
.pdf-summary-flag {
  margin-top: 10px;
  display: flex; gap: 6px;
}

.pdf-summary-empty {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 0;
}
.pdf-summary-empty p { margin: 0; font-size: 13.5px; line-height: 1.6; }
.pdf-summary-empty-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: rgb(var(--accent-rgb)/0.10);
  color: var(--accent-600);
  display: grid; place-items: center;
  flex: none;
}

.pdf-summary-hidden {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  background: var(--surface-2);
  border: 1px dashed var(--border-strong);
  border-radius: 10px;
  font-size: 13px;
}
.pdf-summary-hidden .btn-sm { margin-left: auto; }

/* ---------- Q&A panel ---------- */
.pdf-qa-panel {
  display: flex; flex-direction: column;
  gap: 16px;
  flex: 1;
  min-height: 0;
}
.pdf-qa-header h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.005em;
}
.pdf-qa-list {
  display: flex; flex-direction: column;
  gap: 14px;
  overflow-y: auto;
  flex: 1;
  padding: 4px 2px 8px;
  margin-right: -4px;
  padding-right: 6px;
}

.pdf-qa-empty {
  display: flex; flex-direction: column;
  align-items: center; gap: 10px;
  text-align: center;
  padding: 36px 24px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-2);
}
.pdf-qa-empty h3 { font-size: 1rem; }
.pdf-qa-empty p { margin: 0; max-width: 380px; line-height: 1.6; }
.pdf-qa-empty-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: rgb(var(--accent-rgb)/0.12);
  color: var(--accent-600);
  display: grid; place-items: center;
}

.pdf-qa-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex; flex-direction: column; gap: 12px;
  animation: fadeUp .2s var(--ease);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
@media (max-width: 540px) { .pdf-qa-card { padding: 14px 16px; gap: 10px; } }
.pdf-qa-card:hover { border-color: var(--border-strong); }
.pdf-qa-user {
  background: rgb(var(--accent-rgb)/0.06);
  border-color: rgb(var(--accent-rgb)/0.25);
}
[data-theme="dark"] .pdf-qa-user { background: rgb(var(--accent-rgb)/0.10); }

.pdf-qa-card-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px;
}
.pdf-qa-role { display: flex; align-items: center; gap: 10px; }
.pdf-qa-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent-500), var(--accent-700));
  color: #fff;
  font-weight: 700; font-size: 12px;
  flex: none;
}
.pdf-qa-avatar-user {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}
.pdf-qa-role-name { font-weight: 700; font-size: 13px; color: var(--text); }
.pdf-qa-time { white-space: nowrap; }

.pdf-qa-body {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  word-wrap: break-word;
  overflow-wrap: anywhere;
}
.pdf-qa-body p { margin: 0 0 10px; }
.pdf-qa-body p:last-child { margin-bottom: 0; }
.pdf-qa-body code, .pdf-qa-body pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
}
.pdf-qa-body pre {
  background: var(--surface-2);
  padding: 10px 12px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 8px 0;
  border: 1px solid var(--border);
}

.pdf-qa-translated { display: flex; gap: 6px; }

.pdf-qa-card-actions {
  display: flex; gap: 6px; flex-wrap: wrap;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.pdf-qa-card-actions .btn-sm { padding: 6px 10px; }

/* ---------- PDF composer (Q&A textarea) ---------- */
.pdf-composer {
  display: flex; gap: 10px; align-items: stretch;
  margin-top: 4px;
  padding: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.pdf-composer:focus-within {
  border-color: var(--accent-500);
  box-shadow: 0 0 0 4px rgb(var(--accent-rgb) / 0.15);
}
.pdf-question {
  flex: 1;
  min-height: 72px; max-height: 200px;
  padding: 12px 14px;
  font-size: 15px;
  line-height: 1.5;
  background: transparent;
  border: 0;
  border-radius: 10px;
  resize: none;
  color: var(--text);
  font-family: inherit;
}
.pdf-question:focus { outline: none; box-shadow: none; }
.pdf-question::placeholder { color: var(--text-subtle); font-size: 14.5px; }
.pdf-send {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 16px;
  align-self: stretch;
}
.pdf-send-label { font-weight: 700; }
@media (max-width: 540px) {
  .pdf-question { font-size: 14.5px; min-height: 64px; padding: 10px 12px; }
  .pdf-send-label { display: none; }
  .pdf-send { padding: 10px 12px; }
}

/* ---------- Loading & error rows ---------- */
.pdf-loading-row,
.pdf-error-row {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px;
  border-radius: var(--radius);
  background: var(--surface-2);
  border: 1px solid var(--border);
}
.pdf-error-row {
  background: var(--danger-bg);
  border-color: rgb(239 68 68 / .25);
}
.pdf-error-icon { font-size: 22px; line-height: 1; }

/* ---------- Saved-summaries modal ---------- */
.pdf-saved-list { max-height: 60vh; overflow-y: auto; padding: 4px; }
.pdf-saved-card {
  display: flex; flex-direction: column; gap: 10px;
  padding: 16px 18px;
}
.pdf-saved-head {
  display: flex; align-items: flex-start; gap: 10px;
}
.pdf-saved-doc {
  font-weight: 700;
  color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.pdf-saved-content {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
  white-space: pre-wrap;
  max-height: 220px;
  overflow-y: auto;
  padding: 10px 12px;
  background: var(--bg-soft);
  border-radius: 10px;
  border: 1px solid var(--border);
}