/* =====================================================================
   "Laboratoriya" dizayn tizimi — umumiy tokenlar va komponentlar
   Shriftlar: Unbounded (sarlavhalar, raqamlar), Onest (matn)
   ===================================================================== */
:root {
  color-scheme: light;
  --bg: #F2F5F3; --surface: #FFFFFF; --surface-2: #EEF2F0; --surface-3: #E3EAE6;
  --ink: #0F2A22; --ink-soft: #557066; --ink-faint: #5F766D;
  --border: #DCE5E0; --border-strong: #C9D6D0;
  --accent: #0E8F6A; --accent-strong: #0B7A5A; --accent-ink: #FFFFFF; --accent-soft: #E2F4EC;
  --deep: #0F2A22; --deep-ink: #FFFFFF; --deep-soft: #B9CEC6; --mint: #8FE3C3;
  --good: #0E8F6A; --good-soft: #E2F4EC;
  --bad: #C2413B; --bad-strong: #D9534F; --bad-soft: #FCEDEC; --bad-ink: #5B2421;
  --warn: #A86512; --warn-soft: #FBF1E3;
  --gold: #A87A1E; --gold-soft: #F7EEDB;
  --info: #1D4F99; --info-soft: #E8F0FB;
  --radius: 18px; --radius-sm: 12px;
  --shadow: 0 18px 44px -22px rgb(15 42 34 / 0.45);
  --font: 'Onest', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --display: 'Unbounded', 'Onest', system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0B1612; --surface: #12211C; --surface-2: #182A24; --surface-3: #20362E;
    --ink: #E8F1EC; --ink-soft: #A3B8AF; --ink-faint: #8DA399;
    --border: #23382F; --border-strong: #2F4A3F;
    --accent: #3CC495; --accent-strong: #5AD6AA; --accent-ink: #06130E; --accent-soft: #163A2C;
    --deep: #071410; --deep-ink: #FFFFFF; --deep-soft: #9FBDB1; --mint: #8FE3C3;
    --good: #4FD19F; --good-soft: #163A2C;
    --bad: #F08A80; --bad-strong: #E5655B; --bad-soft: #3A1E1C; --bad-ink: #FBD5D1;
    --warn: #E5B25C; --warn-soft: #34290F;
    --gold: #E2B95C; --gold-soft: #332A12;
    --info: #8DB7F5; --info-soft: #172A47;
    --shadow: 0 18px 44px -22px rgb(0 0 0 / 0.8);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 15px/1.5 var(--font);
  -webkit-font-smoothing: antialiased; -webkit-tap-highlight-color: transparent;
}
img { max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2.5px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }
.tabular { font-variant-numeric: tabular-nums; }

h1, h2, h3 { font-family: var(--display); font-weight: 600; margin: 0; letter-spacing: -0.01em; text-wrap: balance; line-height: 1.25; }
h1 { font-size: 24px; }
h2 { font-size: 18px; }
h3 { font-size: 15px; }

/* ===== Yordamchi joylashuv ===== */
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.stack { display: flex; flex-direction: column; gap: 14px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.grow { flex: 1 1 auto; min-width: 0; }
.muted { color: var(--ink-soft); }
.faint { color: var(--ink-faint); font-size: 13px; }
.small { font-size: 13px; }
.label { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: var(--ink-faint); }
.eyebrow { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent-strong); }

/* ===== Tugmalar: bitta asosiy (primary), qolganlari ikkinchi darajali ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 0 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--ink);
  font-weight: 600; font-size: 14px; cursor: pointer; text-decoration: none; white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent-strong); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 700; }
.btn.primary:hover:not(:disabled) { background: var(--accent-strong); border-color: var(--accent-strong); color: var(--accent-ink); }
.btn.dark { background: var(--deep); border-color: var(--deep); color: var(--deep-ink); font-weight: 700; }
.btn.dark:hover:not(:disabled) { filter: brightness(1.25); color: var(--deep-ink); }
.btn.mint { background: var(--mint); border-color: var(--mint); color: #0F2A22; font-weight: 700; }
.btn.ghost { background: transparent; border-color: transparent; color: var(--ink-soft); }
.btn.ghost:hover:not(:disabled) { background: var(--surface-2); color: var(--ink); border-color: transparent; }
.btn.danger { color: var(--bad); }
.btn.danger:hover:not(:disabled) { border-color: var(--bad); color: var(--bad); }
.btn.danger.solid { background: var(--bad-strong); border-color: var(--bad-strong); color: #fff; }
.btn.sm { min-height: 34px; padding: 0 12px; font-size: 13px; border-radius: 10px; }
.btn.lg { min-height: 54px; padding: 0 22px; font-size: 16px; border-radius: 16px; }
.btn.block { width: 100%; }
.btn.icon { padding: 0; width: 44px; }
.linkbtn { background: none; border: none; color: var(--accent-strong); font-weight: 700; cursor: pointer; padding: 6px 0; font-size: 14px; }

/* ===== Maydonlar ===== */
.input, select.input, textarea.input {
  width: 100%; min-height: 46px; border: 1.5px solid var(--border); background: var(--surface); border-radius: var(--radius-sm);
  padding: 10px 14px; font-size: 15px;
}
.input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.input::placeholder { color: var(--ink-faint); opacity: 0.7; font-family: var(--font); font-size: 15px; font-weight: 400; letter-spacing: 0; text-transform: none; }
textarea.input { resize: vertical; min-height: 80px; line-height: 1.5; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field > span { font-size: 13px; font-weight: 600; color: var(--ink-soft); }

.chip {
  display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 600;
  padding: 4px 10px; border-radius: 999px; background: var(--surface-2); color: var(--ink-soft); white-space: nowrap;
}
.chip.good { background: var(--good-soft); color: var(--good); }
.chip.bad { background: var(--bad-soft); color: var(--bad); }
.chip.warn { background: var(--warn-soft); color: var(--warn); }
.chip.accent { background: var(--accent-soft); color: var(--accent-strong); }
.chip.info { background: var(--info-soft); color: var(--info); }
.chip.outline { background: var(--surface); border: 1px solid var(--border); }

.grade { font-family: var(--display); font-weight: 700; font-size: 13px; padding: 3px 9px; border-radius: 8px; background: var(--surface-2); }
.grade.g-top { background: var(--good-soft); color: var(--good); }
.grade.g-mid { background: var(--info-soft); color: var(--info); }
.grade.g-low { background: var(--warn-soft); color: var(--warn); }

.notice { padding: 12px 14px; border-radius: var(--radius-sm); font-size: 14px; line-height: 1.5; background: var(--surface-2); border: 1px solid var(--border); }
.notice.bad { background: var(--bad-soft); border-color: transparent; color: var(--bad); }
.notice.warn { background: var(--warn-soft); border-color: transparent; color: var(--warn); }
.notice.good { background: var(--good-soft); border-color: transparent; color: var(--good); }

.bar { height: 8px; border-radius: 999px; background: var(--surface-3); overflow: hidden; position: relative; }
.bar > i { position: absolute; inset: 0 auto 0 0; background: var(--accent); border-radius: 999px; }
.bar > b { position: absolute; top: -3px; bottom: -3px; width: 2px; background: var(--ink-faint); }

.spinner { width: 26px; height: 26px; border-radius: 50%; border: 3px solid var(--surface-3); border-top-color: var(--accent); animation: spin 0.8s linear infinite; margin: 40px auto; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 3s; } * { transition: none !important; } }

.overlay {
  position: fixed; inset: 0; z-index: 60; background: rgb(8 20 16 / 0.55);
  display: flex; align-items: flex-start; justify-content: center; padding: 7vh 16px; overflow-y: auto;
}
.modal { background: var(--surface); border-radius: 22px; padding: 22px; width: 100%; max-width: 520px; box-shadow: var(--shadow); }
.modal.wide { max-width: 880px; }
.modal-actions { display: flex; gap: 10px; flex-wrap: wrap-reverse; justify-content: flex-end; }
.modal-actions .btn { flex: 1 1 160px; }

.toast {
  position: fixed; left: 50%; bottom: calc(96px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%);
  z-index: 90; background: var(--deep); color: var(--deep-ink); font-weight: 600; font-size: 14px;
  padding: 12px 18px; border-radius: 14px; box-shadow: var(--shadow); max-width: calc(100% - 32px);
}
.toast.bad { background: var(--bad-strong); color: #fff; }

/* ===== Savol matni (o'quvchi va o'qituvchi uchun umumiy) ===== */
.q-body { font-size: 19px; line-height: 1.5; font-weight: 600; overflow-wrap: anywhere; }
.q-img { display: block; margin: 4px 0; border-radius: 14px; border: 1px solid var(--border); max-height: 460px; object-fit: contain; background: #fff; }

/* ===== Ballar dinamikasi grafigi ===== */
.trend { width: 100%; height: auto; }
.trend-grid { stroke: var(--border); stroke-width: 1; stroke-dasharray: 4 4; }
.trend-lbl { fill: var(--ink-faint); font-size: 10.5px; font-weight: 600; }
.trend-val { fill: var(--ink); font-size: 11px; font-weight: 700; }
.trend-line { fill: none; stroke: var(--accent); stroke-width: 3; stroke-linejoin: round; stroke-linecap: round; }
.trend-dot { fill: var(--surface); stroke: var(--accent); stroke-width: 3; }
.trend-dot.last { fill: var(--accent); }

/* savol ichidagi jadval */
.q-table-wrap { overflow-x: auto; margin: 6px 0; }
.q-table { border-collapse: collapse; font-size: 14px; font-weight: 500; min-width: 60%; }
.q-table td { border: 1px solid var(--border-strong); padding: 6px 10px; vertical-align: top; }
.q-table tr:first-child td { background: var(--surface-2); font-weight: 700; }