/* ==========================================================================
   EduMenejer — design system
   ========================================================================== */
:root {
  --bg: #f6f7fb;
  --bg-soft: #eef0f7;
  --surface: #ffffff;
  --surface-2: #f9fafc;
  --border: #e6e8f0;
  --text: #1a1d29;
  --text-soft: #5b6178;
  --text-faint: #8b90a6;
  --primary: #4f46e5;
  --primary-soft: #eef0ff;
  --primary-ink: #ffffff;
  --accent: #06b6d4;
  --danger: #e11d48;
  --success: #16a34a;
  --ring: rgba(79, 70, 229, 0.35);
  --shadow-sm: 0 1px 2px rgba(20, 24, 40, 0.06);
  --shadow: 0 8px 24px rgba(20, 24, 40, 0.08);
  --shadow-lg: 0 24px 60px rgba(20, 24, 40, 0.18);
  --radius: 16px;
  --radius-sm: 10px;
  --grad: linear-gradient(135deg, #4f46e5 0%, #7c3aed 45%, #06b6d4 100%);
  --maxw: 1140px;
}

html[data-theme='dark'] {
  --bg: #0c0e16;
  --bg-soft: #12141f;
  --surface: #161925;
  --surface-2: #1c2030;
  --border: #262a3b;
  --text: #eef0f7;
  --text-soft: #a7adc4;
  --text-faint: #7b8199;
  --primary: #7c83ff;
  --primary-soft: #1e2140;
  --primary-ink: #0c0e16;
  --accent: #22d3ee;
  --ring: rgba(124, 131, 255, 0.4);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 30px 70px rgba(0, 0, 0, 0.6);
  --grad: linear-gradient(135deg, #6366f1 0%, #8b5cf6 45%, #22d3ee 100%);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

h1, h2, h3, .brand strong { font-family: 'Sora', sans-serif; }

a { color: inherit; text-decoration: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- Topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner { display: flex; align-items: center; gap: 18px; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; margin-right: 6px; }
.brand-mark {
  width: 42px; height: 42px; display: grid; place-items: center;
  font-size: 22px; border-radius: 12px; background: var(--grad);
  box-shadow: var(--shadow-sm);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 18px; letter-spacing: -0.02em; }
.brand-text small { font-size: 11px; color: var(--text-faint); }

.nav { display: flex; gap: 4px; margin-left: 8px; }
.nav a {
  padding: 9px 14px; border-radius: 10px; font-weight: 500; font-size: 14.5px;
  color: var(--text-soft); transition: 0.18s;
}
.nav a:hover { background: var(--bg-soft); color: var(--text); }
.nav a.active { color: var(--primary); background: var(--primary-soft); }

.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.seg {
  display: inline-flex; background: var(--bg-soft); border-radius: 10px; padding: 3px;
  border: 1px solid var(--border);
}
.seg button {
  border: 0; background: transparent; color: var(--text-soft); cursor: pointer;
  font: 600 12px 'Inter'; padding: 5px 9px; border-radius: 7px; transition: 0.15s;
}
.seg button.active { background: var(--surface); color: var(--primary); box-shadow: var(--shadow-sm); }

.icon-btn {
  width: 40px; height: 40px; border-radius: 11px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); cursor: pointer; font-size: 17px;
  display: grid; place-items: center; transition: 0.18s;
}
.icon-btn:hover { border-color: var(--primary); transform: translateY(-1px); }
.menu-btn { display: none; }

.auth-slot { display: flex; align-items: center; gap: 8px; }
.avatar {
  width: 34px; height: 34px; border-radius: 50%; background: var(--grad);
  color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 14px;
}
.user-chip { display: flex; align-items: center; gap: 8px; }
.user-chip .name { font-size: 13.5px; font-weight: 600; max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  padding: 10px 16px; border-radius: 11px; font: 600 14px 'Inter'; cursor: pointer;
  transition: 0.18s; white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--primary); color: var(--primary-ink); border-color: transparent; }
.btn-primary:hover { box-shadow: 0 8px 20px var(--ring); }
.btn-ghost { background: transparent; }
.btn-danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); background: transparent; }
.btn-danger:hover { background: color-mix(in srgb, var(--danger) 12%, transparent); }
.btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 9px; }
.btn-block { width: 100%; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; border-radius: 28px; margin: 26px 0 32px;
  padding: 56px 44px; color: #fff; background: var(--grad); box-shadow: var(--shadow);
}
.hero::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(600px 300px at 85% -10%, rgba(255,255,255,0.25), transparent 60%);
}
.hero > * { position: relative; z-index: 1; }
.hero h1 { font-size: clamp(28px, 4vw, 46px); margin: 0 0 12px; letter-spacing: -0.03em; }
.hero p { font-size: clamp(15px, 2vw, 19px); max-width: 620px; opacity: 0.92; margin: 0 0 24px; }
.hero .btn { background: rgba(255,255,255,0.16); color: #fff; border-color: rgba(255,255,255,0.35); backdrop-filter: blur(6px); }
.hero .btn:hover { background: rgba(255,255,255,0.28); }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 34px; }
.stat {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow-sm);
}
.stat .num { font: 800 30px 'Sora'; letter-spacing: -0.02em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat .lbl { font-size: 13px; color: var(--text-faint); margin-top: 2px; }

/* ---------- Section head ---------- */
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 6px 0 20px; flex-wrap: wrap; }
.section-head h2 { font-size: 24px; margin: 0; letter-spacing: -0.02em; }
.section-head p { margin: 4px 0 0; color: var(--text-soft); font-size: 14px; }

/* ---------- Toolbar ---------- */
.toolbar { display: flex; gap: 12px; margin-bottom: 22px; flex-wrap: wrap; }
.search {
  flex: 1; min-width: 220px; display: flex; align-items: center; gap: 10px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 0 14px;
}
.search input { border: 0; outline: 0; background: transparent; color: var(--text); font-size: 14.5px; padding: 12px 0; width: 100%; }
select.field, .toolbar select {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  color: var(--text); padding: 12px 14px; font: 500 14px 'Inter'; cursor: pointer; min-width: 170px;
}

/* ---------- Cards grid ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: 12px;
  transition: 0.2s; position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; left: 0; top: 0; height: 3px; width: 100%;
  background: var(--grad); opacity: 0; transition: 0.2s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: color-mix(in srgb, var(--primary) 30%, var(--border)); }
.card:hover::before { opacity: 1; }
.card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.file-badge {
  width: 46px; height: 46px; flex: none; border-radius: 12px; background: var(--primary-soft);
  color: var(--primary); display: grid; place-items: center; font-size: 20px;
}
.card h3 { margin: 0; font-size: 17px; line-height: 1.35; letter-spacing: -0.01em; }
.card .authors { font-size: 13px; color: var(--text-soft); }
.card .excerpt { font-size: 13.5px; color: var(--text-soft); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-size: 11.5px; font-weight: 600; padding: 4px 9px; border-radius: 999px;
  background: var(--bg-soft); color: var(--text-soft); border: 1px solid var(--border);
}
.chip.accent { background: var(--primary-soft); color: var(--primary); border-color: transparent; }
.chip.ok { color: var(--success); border-color: color-mix(in srgb, var(--success) 40%, var(--border)); }
.chip.muted { color: var(--text-faint); }
.card-meta { display: flex; gap: 14px; font-size: 12.5px; color: var(--text-faint); margin-top: auto; }
.card-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }

.empty { text-align: center; padding: 60px 20px; color: var(--text-faint); }
.empty .big { font-size: 40px; margin-bottom: 8px; }

/* ---------- Forms / inputs ---------- */
.field-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field-group label { font-size: 13px; font-weight: 600; color: var(--text-soft); }
.field, textarea.field, input.field {
  width: 100%; background: var(--surface-2); border: 1px solid var(--border); border-radius: 11px;
  color: var(--text); padding: 12px 14px; font: 400 14.5px 'Inter'; transition: 0.15s;
}
.field:focus, textarea.field:focus { outline: 0; border-color: var(--primary); box-shadow: 0 0 0 3px var(--ring); background: var(--surface); }
textarea.field { resize: vertical; min-height: 90px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.file-drop {
  border: 2px dashed var(--border); border-radius: 12px; padding: 26px; text-align: center;
  color: var(--text-faint); cursor: pointer; transition: 0.18s; background: var(--surface-2);
}
.file-drop:hover, .file-drop.over { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }
.file-drop.filled { color: var(--text); border-style: solid; border-color: var(--primary); }

/* ---------- Panels ---------- */
.panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-sm); margin-bottom: 20px;
}
.panel h3 { margin: 0 0 16px; font-size: 18px; }

/* ---------- Modal ---------- */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 60; background: rgba(10, 12, 22, 0.55);
  backdrop-filter: blur(4px); display: grid; place-items: center; padding: 20px;
  animation: fade 0.2s ease;
}
.modal-backdrop[hidden] { display: none; }
.modal {
  position: relative; width: min(720px, 100%); max-height: 88vh; overflow: auto;
  background: var(--surface); border: 1px solid var(--border); border-radius: 20px;
  box-shadow: var(--shadow-lg); padding: 32px; animation: pop 0.22s ease;
}
.modal.wide { width: min(920px, 100%); }
.modal-close {
  position: absolute; top: 16px; right: 16px; width: 34px; height: 34px; border-radius: 9px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text-soft);
  cursor: pointer; font-size: 14px;
}
.modal-close:hover { color: var(--danger); border-color: var(--danger); }
@keyframes fade { from { opacity: 0; } }
@keyframes pop { from { opacity: 0; transform: translateY(12px) scale(0.98); } }

.modal h2 { margin: 0 0 6px; font-size: 24px; letter-spacing: -0.02em; padding-right: 30px; }
.modal .sub { color: var(--text-soft); font-size: 14px; margin: 0 0 18px; }
.meta-row { display: flex; flex-wrap: wrap; gap: 18px; margin: 16px 0; padding: 16px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.meta-row .k { font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-faint); }
.meta-row .v { font-size: 15px; font-weight: 600; }

/* ---------- Document viewer ---------- */
.doc-viewer { margin-top: 18px; }
.doc-viewer-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.doc-frame {
  width: 100%; height: 65vh; border: 1px solid var(--border); border-radius: 12px;
  background: var(--surface-2); display: block;
}

/* ---------- Comments ---------- */
.comments { margin-top: 26px; }
.comments h3 { font-size: 17px; margin: 0 0 14px; }
.comment-box { display: flex; gap: 12px; margin-bottom: 20px; }
.comment-box textarea { flex: 1; min-height: 52px; }
.comment {
  display: flex; gap: 12px; padding: 14px 0; border-top: 1px solid var(--border);
}
.comment .avatar { width: 38px; height: 38px; font-size: 14px; flex: none; }
.comment-body { flex: 1; }
.comment-head { display: flex; align-items: center; gap: 8px; margin-bottom: 3px; }
.comment-head .who { font-weight: 600; font-size: 14px; }
.comment-head .when { font-size: 12px; color: var(--text-faint); }
.comment-head .del { margin-left: auto; color: var(--text-faint); background: none; border: 0; cursor: pointer; font-size: 12px; }
.comment-head .del:hover { color: var(--danger); }
.comment-text { font-size: 14px; color: var(--text); white-space: pre-wrap; word-break: break-word; }

/* ---------- Survey builder ---------- */
.q-card { border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin-bottom: 12px; background: var(--surface-2); }
.q-card .q-head { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; }
.q-card .q-head .field { flex: 1; }
.q-opt-row { display: flex; align-items: center; gap: 8px; font-size: 14px; padding: 5px 0; }
.q-opt-row input[type='radio'], .q-opt-row input[type='checkbox'] { width: 18px; height: 18px; accent-color: var(--primary); }

/* Each survey question in the fill form gets its own bordered container */
.fill-q {
  border: 1.5px solid var(--border); border-radius: 14px; padding: 18px;
  margin-bottom: 16px; background: var(--surface); box-shadow: var(--shadow-sm);
  transition: 0.16s;
}
.fill-q:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px var(--ring); }
.fill-q-label { display: block; font-weight: 600; font-size: 15px; margin-bottom: 12px; color: var(--text); }
.fill-q-num {
  display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 7px;
  background: var(--primary-soft); color: var(--primary); font-size: 13px; font-weight: 700;
  margin-right: 4px; vertical-align: -5px;
}

/* Options container inside a survey question */
.options-box {
  display: flex; flex-direction: column; gap: 2px;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 11px;
  padding: 6px 10px;
}
.options-box .q-opt-row {
  cursor: pointer; padding: 9px 10px; border-radius: 8px; transition: 0.14s;
}
.options-box .q-opt-row:hover { background: var(--primary-soft); color: var(--primary); }
.options-box .q-opt-row + .q-opt-row { border-top: 1px solid var(--border); }
.switch-line { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-soft); }

/* ---------- Responses table ---------- */
.resp { border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin-bottom: 12px; background: var(--surface-2); }
.resp .rhead { display: flex; justify-content: space-between; font-size: 13px; color: var(--text-faint); margin-bottom: 10px; }
.resp .qa { font-size: 14px; margin: 6px 0; }
.resp .qa b { color: var(--text-soft); font-weight: 600; }

/* ---------- Toast ---------- */
.toast-host { position: fixed; bottom: 22px; right: 22px; z-index: 90; display: flex; flex-direction: column; gap: 10px; }
.toast {
  background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--primary);
  border-radius: 12px; padding: 13px 18px; box-shadow: var(--shadow); font-size: 14px; font-weight: 500;
  animation: slideIn 0.25s ease; max-width: 320px;
}
.toast.err { border-left-color: var(--danger); }
.toast.ok { border-left-color: var(--success); }
@keyframes slideIn { from { opacity: 0; transform: translateX(20px); } }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); margin-top: 60px; padding: 28px 0; }
.footer-inner { display: flex; justify-content: space-between; color: var(--text-faint); font-size: 13px; }

/* ---------- Auth card ---------- */
.auth-wrap { max-width: 420px; margin: 50px auto; }
.auth-card { background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 34px; box-shadow: var(--shadow); }
.auth-card h2 { margin: 0 0 4px; font-size: 26px; }
.auth-card .switch { text-align: center; margin-top: 16px; font-size: 14px; color: var(--text-soft); }
.auth-card .switch a { color: var(--primary); font-weight: 600; cursor: pointer; }
.hint { font-size: 12.5px; color: var(--text-faint); margin-top: 8px; }
.info-banner { background: var(--primary-soft); color: var(--primary); border-radius: 10px; padding: 10px 14px; font-size: 13px; margin-bottom: 18px; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  /* .nav sits absolutely within .topbar (the nearest positioned ancestor),
     so top: 100% tracks the topbar's real height instead of a hardcoded
     value — needed now that .topbar-inner itself can wrap to two rows. */
  .nav { position: absolute; top: 100%; left: 0; right: 0; background: var(--surface); border-bottom: 1px solid var(--border);
    flex-direction: column; padding: 10px; gap: 4px; display: none; box-shadow: var(--shadow); }
  .nav.open { display: flex; }
  .menu-btn { display: grid; }
  .brand-text small { display: none; }
  .user-chip .name { display: none; }
  .row2 { grid-template-columns: 1fr; }

  /* The language switch + theme toggle + auth buttons don't fit on one
     line alongside the logo and menu button at phone widths (long Uzbek
     button labels); keep logo + hamburger on row 1 like a typical mobile
     header, and push the rest onto their own full-width row 2. */
  .topbar-inner { flex-wrap: wrap; height: auto; padding-top: 10px; padding-bottom: 10px; row-gap: 10px; }
  .menu-btn { margin-left: auto; }
  .topbar-actions { flex: 1 1 100%; flex-wrap: wrap; justify-content: flex-end; row-gap: 8px; margin-left: 0; }
}
@media (max-width: 520px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .hero { padding: 40px 26px; border-radius: 22px; }
  .modal { padding: 24px 20px; }
  .seg button { padding: 5px 7px; }
}