/* style.css — butun sayt uchun umumiy uslub ("Koshin"). Avval telefon, keyin katta ekran. */

/* ---------- Shrift: Literata (oʻzimizda saqlanadi, faqat kerakli harflar — tools/font-subset.py) ---------- */
@font-face {
  font-family: Literata; src: url("../fonts/literata.woff2") format("woff2");
  font-weight: 400 700; font-style: normal; font-display: swap;
}
/* Shrift yuklanguncha tizim shrifti Literata oʻlchamiga moslanadi: almashganda matn sakramasin */
@font-face {
  font-family: "Literata Fallback"; src: local("Noto Serif"), local("Georgia"), local("DejaVu Serif");
  size-adjust: 98%; ascent-override: 118%; descent-override: 31%; line-gap-override: 0%;
}

/* ---------- Ranglar (yorugʻ rejim): sir oq fon, lojuvard siyoh, kobalt, firuza, anor, zafar ---------- */
:root {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --text: #142033;
  --muted: #4a5568;
  --border: #d5dce6;
  --field: #7b8798;       /* kiritish maydoni chegarasi: fonga nisbatan ≥ 3:1 */
  --accent: #1d4e9e;      /* kobalt */
  --accent-text: #ffffff;
  --accent-soft: #e4ebf6;
  --canvas-bg: #edf1f6;
  --ok: #0e7471;          /* firuza — toʻgʻri */
  --ok-soft: #dcefee;
  --bad: #b4233c;         /* anor — notoʻgʻri */
  --bad-soft: #f9e3e7;
  --gold: #b07810;        /* zafar — faqat progress va "yaqin" */
  --w-far: #2f5fc4;
  --w-mid: #0e7471;
  --w-near: #b07810;
  --radius: 6px;
  --gap: 1rem;
  color-scheme: light dark;
}

/* ---------- Ranglar (qorongʻi rejim) ---------- */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --surface: #131d33;
    --text: #e6ecf5;
    --muted: #a3b1c6;
    --border: #263452;
    --field: #6b7a94;
    --accent: #8db0f5;
    --accent-text: #0b1220;
    --accent-soft: #1b2a4a;
    --canvas-bg: #08101d;
    --ok: #43c6be;
    --ok-soft: #0f3034;
    --bad: #ff8a9a;
    --bad-soft: #3d1621;
    --gold: #f0b442;
    --w-far: #5b86e5;
    --w-mid: #43c6be;
    --w-near: #f0b442;
  }
}

/* ---------- Asos: 18px, qator oraligʻi 1.6, sarlavhalar 1.25 shkalada ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 400 1.125rem/1.6 Literata, "Literata Fallback", Georgia, serif;
}
h1, h2, h3 { line-height: 1.2; font-weight: 700; }
h1 { font-size: clamp(1.75rem, 1.2rem + 2.6vw, 2.2rem); margin: 0 0 0.75rem; }
h2 { font-size: 1.4rem; margin: 2.5rem 0 0.75rem; }
h3 { font-size: 1.125rem; }
p { margin: 0 0 1rem; }
a { color: var(--accent); text-underline-offset: 3px; text-decoration-thickness: 1px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.wrap { max-width: calc(28em + 2rem); margin: 0 auto; padding: 0 1rem; }
/* Kontent JS bilan keyinroq yuklanadi: footer boshidanoq ekran ostida tursin, aks holda u "sakraydi" (CLS) */
main { min-height: 100vh; min-height: 100svh; }
.wrap-wide { max-width: 72rem; }
main > h1:first-child { margin-top: 1.5rem; }
main.wrap-wide > p { max-width: 30em; } /* keng sahifada ham qator ≤ 68 belgi */
.skip-link { position: absolute; left: -999px; }
.skip-link:focus { left: 1rem; top: 1rem; z-index: 10; background: var(--surface); padding: 0.5rem 1rem; }

/* ---------- Sarlavha va pastki qism ---------- */
.site-header { border-bottom: 1px solid var(--border); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0 1rem; padding-block: 0.25rem; }
.brand { font-weight: 700; font-size: 1rem; color: var(--text); text-decoration: none; padding: 0.6rem 0; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0 0.75rem; font-size: 1rem; }
.site-nav a { display: inline-block; padding: 0.6rem 0 0.5rem; text-decoration: none; color: var(--muted); border-bottom: 2px solid transparent; }
.site-nav a:hover { color: var(--text); }
.site-nav a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); }
.site-footer { margin-top: 3rem; padding: 1.5rem 0 2rem; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }
.site-footer a { color: var(--muted); }

/* ---------- Tugmalar: bosilganda biroz choʻkadi (faqat transform) ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  min-height: 2.75rem; padding: 0.5rem 1.1rem;
  border: 1px solid var(--accent); border-radius: var(--radius);
  background: var(--accent); color: var(--accent-text);
  font: inherit; font-size: 1rem; font-weight: 600; text-decoration: none; cursor: pointer;
  transition: transform 0.1s;
}
.btn:active { transform: translateY(1px) scale(0.98); }
.btn-secondary { background: transparent; color: var(--accent); }
.help { margin-top: 1.5rem; max-width: calc(28em + 2rem); }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.25rem 0; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; }
.lead { font-size: 1.2rem; color: var(--muted); }
small, .hint { font-size: 0.85rem; }
.hint { display: block; color: var(--muted); margin: 0.35rem 0 0; }

/* ---------- Progress: zafar rangli chiziq (oltin faqat shu yerda va "yaqin" uchun) ---------- */
.progress { display: flex; align-items: center; gap: 0.6rem; font-size: 0.9rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.progress-track { flex: 1; max-width: 10rem; height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; }
.progress-fill { display: block; height: 100%; background: var(--gold); transform-origin: left; transform: scaleX(var(--done, 0)); transition: transform 0.8s ease-out; }

/* ---------- Rozetka-emblema (math4d.js bilan hisoblanadi, rozetka.js chizadi) ---------- */
.emblem { display: block; flex: none; color: var(--accent); }
.emblem path { fill: none; stroke: currentColor; stroke-linejoin: round; }
.emblem-note { font-size: 0.85rem; color: var(--muted); }

/* ---------- Simulyator ---------- */
.sim { display: grid; gap: var(--gap); align-content: start; }
.sim-stage { position: relative; }
.sim-canvas {
  display: block; width: 100%; height: min(80vw, 22rem);
  background: var(--canvas-bg); border-radius: var(--radius); /* ramka yoʻq: fon rangi yetarli */
  touch-action: none; /* barmoq bilan sudraganda sahifa siljimasin */
  cursor: grab;
}
.sim-canvas:active { cursor: grabbing; }
.sim-info { position: absolute; left: 0.75rem; top: 0.5rem; right: 0.75rem; margin: 0; font-size: 0.85rem; color: var(--muted); pointer-events: none; }
.sim-skip { position: absolute; right: 0.5rem; bottom: 0.5rem; background: var(--surface); font-size: 0.9rem; }
.sim-side { display: grid; gap: var(--gap); align-content: start; }
.sim > *, .sim-panel > *, .sim-row > * { min-width: 0; } /* uzun formula panelni ekrandan kengaytirmasin */
.sim-panel { display: grid; gap: 0.9rem; }
.sim-row { display: grid; gap: 0.35rem; }
.sim-label { font-size: 0.85rem; font-weight: 600; color: var(--muted); }
.sim-auto { display: grid; grid-template-columns: auto 1fr; gap: 0.75rem; align-items: end; }

.seg { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.seg button {
  min-width: 2.75rem; min-height: 2.75rem; padding: 0.4rem 0.8rem;
  border: 1px solid var(--field); border-radius: var(--radius);
  background: var(--surface); color: var(--text); font: inherit; font-size: 1rem; cursor: pointer;
}
.seg button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }

.range { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 0 0.5rem; font-size: 0.9rem; }
.range label { font-weight: 600; }
.range output { font-variant-numeric: tabular-nums; color: var(--muted); }
.range input { grid-column: 1 / -1; width: 100%; height: 2.25rem; margin: 0; accent-color: var(--accent); }

.planes { border: 1px solid var(--border); border-radius: var(--radius); padding: 0.25rem 0.9rem; background: var(--surface); }
.planes summary { cursor: pointer; font-weight: 600; padding: 0.6rem 0; min-height: 2.75rem; display: flex; align-items: center; }
.planes-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(8.5rem, 1fr)); gap: 0.25rem 1rem; padding-bottom: 0.75rem; }

/* Izoh: ponasimon chiziq — uzoq tomoni ingichka va koʻk, yaqin tomoni qalin va zafar */
.sim-legend p { margin: 0; }
.legend-wedge { height: 0.75rem; background: linear-gradient(90deg, var(--w-far), var(--w-mid), var(--w-near)); clip-path: polygon(0 42%, 100% 0, 100% 100%, 0 58%); }
.legend-ends { display: flex; justify-content: space-between; font-size: 0.85rem; }

/* Chiroq (faqat 4-darsda): surilsa d oʻzgaradi, ostida jonli formula */
.lamp-head { display: flex; justify-content: space-between; gap: 0.5rem; font-size: 0.9rem; }
.lamp-head label { font-weight: 600; }
.lamp-head output { font-variant-numeric: tabular-nums; color: var(--muted); }
.lamp input { width: 100%; margin: 0; -webkit-appearance: none; appearance: none; background: transparent; height: 2.75rem; }
.lamp input::-webkit-slider-runnable-track { height: 4px; background: var(--field); border-radius: 2px; }
.lamp input::-moz-range-track { height: 4px; background: var(--field); border-radius: 2px; }
.lamp input::-webkit-slider-thumb { -webkit-appearance: none; width: 1.75rem; height: 2.3rem; margin-top: -1.1rem; border: 0; background: var(--lamp) center / contain no-repeat; cursor: grab; }
.lamp input::-moz-range-thumb { width: 1.75rem; height: 2.3rem; border: 0; background: var(--lamp) center / contain no-repeat; cursor: grab; }
.lamp p { margin: 0; }
.lamp input:focus-visible { outline-offset: -3px; }
:root { --lamp: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 32'%3E%3Cpath d='M12 2a9 9 0 0 0-5 16.5V22h10v-3.5A9 9 0 0 0 12 2z' fill='%23b07810'/%3E%3Cpath d='M8 25h8M9 29h6' stroke='%23142033' stroke-width='2.4' stroke-linecap='round'/%3E%3C/svg%3E"); }
@media (prefers-color-scheme: dark) { :root { --lamp: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 32'%3E%3Cpath d='M12 2a9 9 0 0 0-5 16.5V22h10v-3.5A9 9 0 0 0 12 2z' fill='%23f0b442'/%3E%3Cpath d='M8 25h8M9 29h6' stroke='%23e6ecf5' stroke-width='2.4' stroke-linecap='round'/%3E%3C/svg%3E"); } }
.lamp-formula { font-variant-numeric: tabular-nums; font-size: 0.95rem; overflow-x: auto; white-space: nowrap; margin: 0.5rem 0 0; }

/* Toʻliq ekranli simulyator sahifasi: kamida bir ekran balandligida, ostidagi yordam sakramasin */
.sim-full { min-height: 100vh; min-height: 100svh; }
.sim-full .sim-canvas { height: min(100vw, 62vh); }
@media (min-width: 60rem) {
  .sim-full { grid-template-columns: minmax(0, 1fr) 20rem; align-items: start; }
  .sim-full .sim-canvas { height: min(78vh, 46rem); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}

/* ---------- Yordamchilar ---------- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.link-button { background: none; border: 0; padding: 0; font: inherit; color: var(--accent); text-decoration: underline; cursor: pointer; min-height: 2.75rem; }

/* ---------- Rozilik banneri (sahifani bloklamaydi, pastda turadi) ---------- */
.consent { position: fixed; left: 0; right: 0; bottom: 0; z-index: 20; background: var(--surface); border-top: 2px solid var(--accent); }
.consent-inner { max-width: 46rem; margin: 0 auto; padding: 1rem; font-size: 1rem; }
.consent-text { margin: 0 0 0.5rem; }
.consent-choices { margin: 0; padding-left: 1.2rem; font-size: 0.9rem; color: var(--muted); }
.consent-choices strong { color: var(--text); }
.consent-state { margin: 0 0 0.5rem; color: var(--muted); font-size: 0.9rem; }
.consent-buttons { margin: 0.75rem 0 0.25rem; }
.consent-more { font-size: 0.9rem; display: inline-block; padding: 0.4rem 0; }

/* ---------- Seminar: “Oxiridagi testni topshirish” (faqat seminar paytida) ---------- */
.seminar-bar { background: var(--accent-soft); border-bottom: 1px solid var(--border); }
.seminar-bar .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem; padding-block: 0.6rem; }
.seminar-bar p { margin: 0; font-size: 0.95rem; }