/* ==========================================================================
   نقشه درس — سیستم طراحی
   DNA: کاغذ، جوهر، نقشه‌ی خطی. تمرکز روی سلسله‌مراتب، خوانایی و ریتم.
   ========================================================================== */

@font-face {
  font-family: "Vazirmatn";
  src: url("assets/fonts/Vazirmatn-Regular.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Vazirmatn";
  src: url("assets/fonts/Vazirmatn-Bold.woff2") format("woff2");
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Vazirmatn";
  src: url("assets/fonts/Vazirmatn-Black.woff2") format("woff2");
  font-weight: 900; font-style: normal; font-display: swap;
}

/* ---------- Tokens ---------- */
:root {
  /* Colors */
  --color-primary: #1F3A5F;       /* جوهر آبی-سرمه‌ای */
  --color-primary-ink: #142742;
  --color-secondary: #E7DCC6;     /* کاغذ شنی */
  --color-accent: #D9653B;        /* مداد نارنجی-آجری */
  --color-accent-ink: #B24C25;
  --color-background: #F5F0E6;    /* کاغذ */
  --color-surface: #FBF8F1;       /* برگه‌ی روشن */
  --color-surface-2: #EFE7D6;     /* برگه‌ی تیره‌تر */
  --color-text: #1D2433;
  --color-muted: #5B6375;
  --color-border: #D5C9AE;
  --color-success: #3E7D5A;
  --color-warning: #B9800F;
  --color-danger: #B3261E;
  --color-on-primary: #F5F0E6;

  /* Category spines */
  --cat-basic: #3E7D5A;
  --cat-uni: #1F3A5F;
  --cat-skill: #D9653B;

  /* Layout */
  --container: 1200px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --header-h: 68px;

  /* Spacing scale */
  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --space-9: 6.5rem;

  /* Radius (تیز و کاغذی) */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-pill: 999px;

  /* Shadows (نرم و کم) */
  --shadow-sm: 0 1px 0 rgba(29,36,51,.06), 0 1px 2px rgba(29,36,51,.06);
  --shadow-md: 0 1px 0 rgba(29,36,51,.05), 0 10px 24px -14px rgba(29,36,51,.28);
  --shadow-lg: 0 24px 60px -24px rgba(20,39,66,.45);

  /* Motion */
  --ease-standard: cubic-bezier(.2,.7,.2,1);
  --ease-emphasis: cubic-bezier(.16,1,.3,1);
  --dur-fast: 160ms;
  --dur-base: 320ms;
  --dur-slow: 720ms;

  /* Z layers */
  --z-header: 50;
  --z-bottom: 60;
  --z-scrim: 80;
  --z-drawer: 90;
  --z-toast: 100;

  /* Type */
  --font: "Vazirmatn", Tahoma, "Segoe UI", system-ui, sans-serif;
  --fs-hero: clamp(2.6rem, 1.4rem + 5.2vw, 5.4rem);
  --fs-h2: clamp(1.75rem, 1.2rem + 2.2vw, 2.9rem);
  --fs-h3: clamp(1.1rem, 1rem + .4vw, 1.3rem);
  --fs-body: clamp(.98rem, .93rem + .2vw, 1.06rem);
  --fs-small: .875rem;

  /* Buttons */
  --btn-h: 48px;
  --btn-h-sm: 38px;
}

/* ---------- Base ---------- */
[hidden] { display: none !important; }
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 16px); }
body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-background);
  -webkit-font-smoothing: antialiased;
  padding-bottom: 76px;
  overflow-x: hidden;
}
@media (min-width: 900px) { body { padding-bottom: 0; } }

/* Grain overlay (subtle paper texture) */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: .35;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 .12  0 0 0 0 .14  0 0 0 0 .2  0 0 0 .09 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}
body > * { position: relative; z-index: 1; }
body > .scrim, body > .drawer, body > .toasts { position: fixed; }

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--color-accent-ink); }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
h1, h2, h3, p, ul, ol, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.container { width: min(100% - 2 * var(--gutter), var(--container)); margin-inline: auto; }
.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: 8px; right: 8px; z-index: 200;
  background: var(--color-primary); color: var(--color-on-primary);
  padding: .6rem 1rem; border-radius: var(--radius-sm);
  transform: translateY(-200%); transition: transform var(--dur-fast);
}
.skip-link:focus { transform: none; }

.eyebrow {
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0;
  color: var(--color-accent-ink);
  display: inline-flex; align-items: center; gap: .6rem;
  margin-bottom: var(--space-3);
}
.eyebrow::before {
  content: ""; width: 26px; height: 2px; background: currentColor; border-radius: 2px;
}
.section-title {
  font-size: var(--fs-h2);
  font-weight: 900;
  line-height: 1.25;
  color: var(--color-primary-ink);
  letter-spacing: 0;
}
.section-head { margin-bottom: var(--space-7); max-width: 720px; }
.section-head.split {
  max-width: none;
  display: grid; gap: var(--space-4);
  grid-template-columns: 1fr;
  align-items: end;
}
@media (min-width: 900px) {
  .section-head.split { grid-template-columns: 1.2fr 1fr; gap: var(--space-7); }
}
.section-intro { color: var(--color-muted); margin-top: var(--space-4); max-width: 60ch; }
.note-small { color: var(--color-muted); font-size: var(--fs-small); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  min-height: var(--btn-h);
  padding: .7rem 1.4rem;
  border-radius: var(--radius-md);
  border: 1.5px solid transparent;
  font-weight: 700;
  font-size: .98rem;
  text-align: center;
  transition: transform var(--dur-fast) var(--ease-standard), background var(--dur-base), color var(--dur-base), box-shadow var(--dur-base);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn-primary { background: var(--color-accent); color: #fff; box-shadow: 0 8px 20px -10px rgba(217,101,59,.8); }
.btn-primary:hover { background: var(--color-accent-ink); color: #fff; }
.btn-ghost { border-color: var(--color-primary); color: var(--color-primary); background: transparent; }
.btn-ghost:hover { background: var(--color-primary); color: var(--color-on-primary); }
.btn-light { background: var(--color-background); color: var(--color-primary-ink); }
.btn-light:hover { background: #fff; color: var(--color-primary-ink); transform: translateY(-1px); }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .45; cursor: not-allowed; transform: none; }
.btn-sm { min-height: var(--btn-h-sm); padding: .45rem 1rem; font-size: .9rem; }

.link-btn {
  background: none; border: 0; padding: .5rem .25rem; color: var(--color-primary);
  font-weight: 700; text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1.5px;
  min-height: 44px;
}
.link-btn:hover { color: var(--color-accent-ink); }

.icon-btn {
  position: relative;
  width: 44px; height: 44px;
  display: inline-grid; place-items: center;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  color: var(--color-primary-ink);
  transition: border-color var(--dur-base), transform var(--dur-fast);
}
.icon-btn svg { width: 22px; height: 22px; }
.icon-btn:hover { border-color: var(--color-primary); }
.icon-btn:active { transform: scale(.96); }
.icon-btn.is-pulse { animation: pulse 480ms var(--ease-emphasis); }
@keyframes pulse { 0% { transform: scale(1); } 40% { transform: scale(1.12); } 100% { transform: scale(1); } }

.badge {
  position: absolute; top: -7px; inset-inline-start: -7px;
  min-width: 22px; height: 22px; padding: 0 6px;
  border-radius: var(--radius-pill);
  background: var(--color-accent); color: #fff;
  font-size: .72rem; font-weight: 900;
  display: grid; place-items: center;
  line-height: 1;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: var(--z-header);
  background: color-mix(in srgb, var(--color-background) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
}
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--color-primary-ink); }
.brand:hover { color: var(--color-primary-ink); }
.brand-mark { width: 40px; height: 40px; color: var(--color-primary); flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-weight: 900; font-size: 1.15rem; }
.brand-text small { font-size: .7rem; letter-spacing: .04em; color: var(--color-muted); font-weight: 700; direction: ltr; text-align: start; }

.main-nav {
  position: fixed; inset: var(--header-h) 0 auto 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: flex; flex-direction: column;
  padding: var(--space-3) var(--gutter) var(--space-5);
  transform: translateY(-8px); opacity: 0; visibility: hidden;
  transition: transform var(--dur-base) var(--ease-emphasis), opacity var(--dur-base), visibility var(--dur-base);
}
.main-nav.is-open { transform: none; opacity: 1; visibility: visible; }
.main-nav a {
  padding: .9rem 0; border-bottom: 1px dashed var(--color-border);
  font-weight: 700; color: var(--color-primary-ink); min-height: 48px;
  display: flex; align-items: center;
}
.main-nav a:last-child { border-bottom: 0; }

.header-actions { display: flex; align-items: center; gap: var(--space-2); }

.menu-btn {
  width: 44px; height: 44px; border: 1.5px solid var(--color-border); background: var(--color-surface);
  border-radius: var(--radius-md); display: grid; place-items: center;
}
.menu-lines, .menu-lines::before, .menu-lines::after {
  display: block; width: 18px; height: 2px; background: var(--color-primary-ink);
  border-radius: 2px; transition: transform var(--dur-base) var(--ease-emphasis), opacity var(--dur-base);
}
.menu-lines { position: relative; }
.menu-lines::before, .menu-lines::after { content: ""; position: absolute; inset-inline-start: 0; }
.menu-lines::before { top: -6px; }
.menu-lines::after { top: 6px; }
.menu-btn[aria-expanded="true"] .menu-lines { background: transparent; }
.menu-btn[aria-expanded="true"] .menu-lines::before { transform: translateY(6px) rotate(45deg); }
.menu-btn[aria-expanded="true"] .menu-lines::after { transform: translateY(-6px) rotate(-45deg); }

@media (min-width: 900px) {
  .menu-btn { display: none; }
  .main-nav {
    position: static; flex-direction: row; gap: var(--space-5);
    background: none; border: 0; box-shadow: none; padding: 0;
    transform: none; opacity: 1; visibility: visible;
  }
  .main-nav a { border: 0; padding: .5rem 0; min-height: 0; font-size: .97rem; position: relative; }
  .main-nav a::after {
    content: ""; position: absolute; inset-inline: 0; bottom: 0; height: 2px;
    background: var(--color-accent); transform: scaleX(0); transform-origin: right;
    transition: transform var(--dur-base) var(--ease-emphasis);
  }
  .main-nav a:hover::after { transform: scaleX(1); }
}

/* ---------- Hero ---------- */
.hero { padding: var(--space-8) 0 var(--space-7); position: relative; }
.hero-grid { display: grid; gap: var(--space-7); align-items: center; }
@media (min-width: 960px) {
  .hero-grid { grid-template-columns: 1.1fr .9fr; gap: var(--space-8); }
}
.hero-title {
  font-size: var(--fs-hero);
  font-weight: 900;
  line-height: 1.12;
  color: var(--color-primary-ink);
  letter-spacing: 0;
}
.hero-title-accent {
  position: relative; display: inline-block; color: var(--color-accent);
  background: linear-gradient(transparent 68%, rgba(217,101,59,.22) 68%, rgba(217,101,59,.22) 92%, transparent 92%);
  padding-inline: .05em;
}
.hero-lead {
  margin-top: var(--space-5);
  font-size: clamp(1rem, .95rem + .35vw, 1.2rem);
  color: var(--color-muted);
  max-width: 52ch;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-6); }
.hero-stats {
  display: flex; gap: var(--space-6); margin-top: var(--space-7); flex-wrap: wrap;
  border-top: 1px solid var(--color-border); padding-top: var(--space-5); max-width: 560px;
}
.hero-stats > div { display: flex; flex-direction: column; gap: .2rem; }
.hero-stats dt { font-size: var(--fs-small); color: var(--color-muted); }
.hero-stats dd { font-size: clamp(1.6rem, 1.2rem + 1.2vw, 2.2rem); font-weight: 900; color: var(--color-primary-ink); line-height: 1; font-variant-numeric: tabular-nums; }

/* Hero visual: note sheet */
.hero-visual { position: relative; margin: 0; max-width: 520px; width: 100%; justify-self: center; }
.sheet {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  padding: var(--space-5);
  transform: rotate(-1.4deg);
  transition: transform var(--dur-slow) var(--ease-emphasis);
}
.hero-visual:hover .sheet { transform: rotate(0deg) translateY(-4px); }
.sheet-head {
  display: flex; justify-content: space-between; align-items: center;
  font-weight: 700; font-size: var(--fs-small); color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary); padding-bottom: var(--space-2); margin-bottom: var(--space-3);
}
.sheet-date { color: var(--color-muted); font-weight: 400; }
.route { width: 100%; height: auto; }
.route-line { stroke-dasharray: 6 8; }
.sheet-note { font-size: var(--fs-small); color: var(--color-muted); text-align: center; margin-top: var(--space-3); }
.sticker {
  position: absolute; bottom: -18px; inset-inline-start: -10px;
  background: var(--color-accent); color: #fff;
  padding: .55rem .9rem; border-radius: 6px; transform: rotate(4deg);
  box-shadow: var(--shadow-md); display: flex; flex-direction: column; line-height: 1.2;
}
.sticker span { font-weight: 900; font-size: .95rem; }
.sticker small { font-size: .72rem; opacity: .9; }

/* Marquee */
.marquee {
  margin-top: var(--space-8); overflow: hidden;
  border-block: 1px solid var(--color-border);
  background: var(--color-primary); color: var(--color-on-primary);
  padding: .85rem 0;
}
.marquee-track {
  display: flex; gap: 1.25rem; align-items: center; width: max-content;
  animation: marquee 38s linear infinite;
  font-weight: 900; font-size: clamp(1rem, .9rem + .6vw, 1.4rem);
  white-space: nowrap; padding-inline-start: 1.25rem;
}
.marquee-track i { width: 8px; height: 8px; border-radius: 50%; background: var(--color-accent); display: inline-block; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(50%); } }
@media (prefers-reduced-motion: reduce) { .marquee-track { animation: none; } }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity var(--dur-slow) var(--ease-emphasis), transform var(--dur-slow) var(--ease-emphasis); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal:nth-child(2) { transition-delay: 80ms; }
.reveal:nth-child(3) { transition-delay: 160ms; }
.reveal:nth-child(4) { transition-delay: 240ms; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Study map (signature) ---------- */
.map-section {
  padding: var(--space-8) 0;
  background:
    linear-gradient(rgba(31,58,95,.07) 1px, transparent 1px) 0 0 / 28px 28px,
    linear-gradient(90deg, rgba(31,58,95,.07) 1px, transparent 1px) 0 0 / 28px 28px,
    var(--color-surface-2);
  border-block: 1px solid var(--color-border);
}
.ruler-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-5), 3vw, var(--space-7));
  box-shadow: var(--shadow-md);
}
.ruler-readout { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-3) var(--space-5); margin-bottom: var(--space-6); }
.ruler-label { font-size: var(--fs-small); color: var(--color-muted); }
.grade-title {
  font-size: clamp(2rem, 1.4rem + 2.6vw, 3.4rem);
  font-weight: 900; color: var(--color-primary-ink); line-height: 1.1;
}
.grade-count {
  background: var(--color-secondary); color: var(--color-primary-ink);
  padding: .3rem .8rem; border-radius: var(--radius-pill); font-weight: 700; font-size: var(--fs-small);
}

.ruler { position: relative; padding-block: var(--space-3) var(--space-2); }
.ruler input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 44px; background: transparent; margin: 0; cursor: pointer;
}
.ruler input[type="range"]::-webkit-slider-runnable-track {
  height: 10px; border-radius: 10px;
  background: linear-gradient(to left, var(--color-border) var(--fill-start, 0%), var(--color-primary) var(--fill-start, 0%));
}
.ruler input[type="range"]::-moz-range-track { height: 10px; border-radius: 10px; background: var(--color-border); }
.ruler input[type="range"]::-moz-range-progress { height: 10px; border-radius: 10px; background: var(--color-primary); }
.ruler input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 30px; height: 30px; margin-top: -10px; border-radius: 50%;
  background: var(--color-accent); border: 4px solid var(--color-surface);
  box-shadow: 0 4px 12px -2px rgba(217,101,59,.7);
  transition: transform var(--dur-fast);
}
.ruler input[type="range"]::-moz-range-thumb {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--color-accent); border: 4px solid var(--color-surface);
}
.ruler input[type="range"]:active::-webkit-slider-thumb { transform: scale(1.12); }
.ruler input[type="range"]:focus-visible { outline: none; }
.ruler input[type="range"]:focus-visible::-webkit-slider-thumb { outline: 3px solid var(--color-primary); outline-offset: 3px; }
.ruler-ticks {
  display: grid; grid-template-columns: repeat(12, 1fr); margin-top: var(--space-2);
  font-size: .72rem; color: var(--color-muted); text-align: center; line-height: 1.2;
}
.ruler-ticks li { position: relative; padding-top: 10px; }
.ruler-ticks li::before {
  content: ""; position: absolute; top: 0; left: 50%; width: 1px; height: 8px; background: var(--color-border);
}
.ruler-ticks li:nth-child(n+8) { display: none; }
@media (min-width: 560px) { .ruler-ticks li:nth-child(n+8) { display: block; } }

.subject-tiles {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3);
  margin-top: var(--space-6);
}
@media (min-width: 720px) { .subject-tiles { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1000px) { .subject-tiles { grid-template-columns: repeat(6, 1fr); } }
.subject-tile {
  position: relative;
  display: flex; flex-direction: column; gap: .3rem; align-items: flex-start;
  text-align: right;
  width: 100%;
  padding: var(--space-4);
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-height: 120px;
  transition: transform var(--dur-base) var(--ease-standard), border-color var(--dur-base), box-shadow var(--dur-base);
  animation: tile-in var(--dur-slow) var(--ease-emphasis) both;
}
.subject-tile:hover { transform: translateY(-3px); border-color: var(--color-primary); box-shadow: var(--shadow-md); }
.subject-tile:active { transform: translateY(0); }
.subject-tile .tile-num { font-size: .75rem; color: var(--color-accent-ink); font-weight: 700; }
.subject-tile strong { font-size: 1rem; line-height: 1.4; color: var(--color-primary-ink); }
.subject-tile .tile-meta { margin-top: auto; font-size: .8rem; color: var(--color-muted); }
.subject-tile .tile-arrow { position: absolute; top: var(--space-3); inset-inline-start: var(--space-3); color: var(--color-muted); transition: transform var(--dur-base) var(--ease-emphasis); }
.subject-tile:hover .tile-arrow { transform: translate(-3px, -3px); color: var(--color-accent); }
@keyframes tile-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .subject-tile { animation: none; } .subject-tile:hover { transform: none; } }

/* ---------- Catalog ---------- */
.catalog { padding: var(--space-9) 0 var(--space-8); }
.tabs {
  display: flex; gap: var(--space-2); flex-wrap: wrap;
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: var(--space-6);
}
.tabs [role="tab"] {
  background: none; border: 0; padding: .9rem 1.1rem;
  font-weight: 700; font-size: 1rem; color: var(--color-muted);
  border-bottom: 3px solid transparent; margin-bottom: -2px;
  min-height: 52px;
  display: inline-flex; align-items: center; gap: .5rem;
  transition: color var(--dur-base), border-color var(--dur-base);
}
.tabs [role="tab"]:hover { color: var(--color-primary-ink); }
.tabs [role="tab"][aria-selected="true"] { color: var(--color-primary-ink); border-bottom-color: var(--color-accent); }
.tab-num { font-size: .72rem; color: var(--color-accent-ink); font-variant-numeric: tabular-nums; }

.chips {
  display: flex; gap: var(--space-2); overflow-x: auto; scrollbar-width: none;
  padding: var(--space-2) 0 var(--space-4);
  margin-inline: calc(var(--gutter) * -1); padding-inline: var(--gutter);
  scroll-snap-type: x proximity;
}
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: none; scroll-snap-align: start;
  min-height: 42px; padding: .45rem 1rem;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-pill);
  font-weight: 700; font-size: .92rem;
  transition: background var(--dur-base), color var(--dur-base), border-color var(--dur-base), transform var(--dur-fast);
}
.chip:hover { border-color: var(--color-primary); }
.chip:active { transform: scale(.97); }
.chip[aria-pressed="true"] { background: var(--color-primary); color: var(--color-on-primary); border-color: var(--color-primary); }
.chip .chip-n { opacity: .65; font-weight: 400; margin-inline-start: .3rem; font-size: .8rem; }

.toolbar {
  display: grid; gap: var(--space-3);
  grid-template-columns: 1fr;
  align-items: end;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}
@media (min-width: 760px) {
  .toolbar { grid-template-columns: 2fr 1fr 1fr auto; }
  .toolbar .link-btn { grid-column: 1 / -1; justify-self: start; }
  .toolbar .toggle-btn { align-self: stretch; }
}
@media (min-width: 1080px) {
  .toolbar { grid-template-columns: 2.2fr 1fr 1fr auto auto; }
  .toolbar .link-btn { grid-column: auto; }
}
.field { display: flex; flex-direction: column; gap: .35rem; position: relative; }
.field > span:first-child { font-size: var(--fs-small); font-weight: 700; color: var(--color-muted); }
.field input, .field select {
  width: 100%; min-height: 48px;
  padding: .7rem .95rem;
  background: var(--color-background);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--dur-base), box-shadow var(--dur-base);
}
.field input::placeholder { color: #8A8F9B; }
.field input:focus, .field select:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 4px rgba(31,58,95,.14); }
.field.is-invalid input, .field.is-invalid select { border-color: var(--color-danger); }
.field .error { color: var(--color-danger); font-size: .8rem; min-height: 1em; }
.search-field svg {
  position: absolute; inset-inline-start: 14px; top: 50%; transform: translateY(-50%);
  width: 20px; height: 20px; color: var(--color-muted); pointer-events: none;
  top: calc(50% + 11px);
}
.search-field input { padding-inline-start: 2.6rem; }
.search-field input::-webkit-search-cancel-button { cursor: pointer; }
.toggle-btn {
  min-height: 48px; padding: .6rem 1rem;
  border: 1.5px solid var(--color-border); background: var(--color-background);
  border-radius: var(--radius-md); font-weight: 700; font-size: .92rem; white-space: nowrap;
  transition: background var(--dur-base), border-color var(--dur-base), color var(--dur-base);
}
.toggle-btn[aria-pressed="true"] { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.results-line { color: var(--color-muted); font-size: var(--fs-small); margin-bottom: var(--space-5); }
.results-line span { font-weight: 900; color: var(--color-primary-ink); font-variant-numeric: tabular-nums; }

/* Course cards: ticket / ruled-sheet geometry */
.course-grid {
  display: grid; gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 620px) { .course-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .course-grid { grid-template-columns: repeat(3, 1fr); } }

.course {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  padding-inline-start: calc(var(--space-5) + 10px);
  overflow: hidden;
  transition: transform var(--dur-base) var(--ease-standard), box-shadow var(--dur-base), border-color var(--dur-base);
  animation: card-in var(--dur-slow) var(--ease-emphasis) both;
  animation-delay: calc(var(--i, 0) * 40ms);
}
.course::before {
  content: ""; position: absolute; inset-block: 0; inset-inline-start: 0; width: 6px;
  background: var(--spine, var(--color-primary));
}
.course:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: color-mix(in srgb, var(--spine) 40%, var(--color-border)); }
.course[data-cat="basic"] { --spine: var(--cat-basic); }
.course[data-cat="uni"] { --spine: var(--cat-uni); }
.course[data-cat="skill"] { --spine: var(--cat-skill); }

.course-top { display: flex; justify-content: space-between; gap: var(--space-3); align-items: flex-start; }
.course-subject {
  font-size: .78rem; font-weight: 700; color: var(--color-primary);
  background: var(--color-secondary); padding: .2rem .6rem; border-radius: var(--radius-sm);
}
.fav-btn {
  flex: none; width: 44px; height: 44px; margin: -8px -8px -8px 0;
  display: grid; place-items: center; border: 0; background: none; border-radius: 50%;
  color: var(--color-muted);
  transition: transform var(--dur-fast), color var(--dur-base);
}
.fav-btn:hover { color: var(--color-accent); }
.fav-btn:active { transform: scale(.9); }
.fav-btn svg { width: 22px; height: 22px; }
.fav-btn[aria-pressed="true"] { color: var(--color-accent); }
.fav-btn[aria-pressed="true"] svg path { fill: currentColor; }

.course-title {
  font-size: var(--fs-h3); font-weight: 900; line-height: 1.5; color: var(--color-primary-ink);
  margin-top: var(--space-3);
}
.course-title button {
  background: none; border: 0; padding: 0; text-align: right; font-weight: inherit; font-size: inherit; color: inherit; line-height: inherit;
}
.course-title button:hover { color: var(--color-accent-ink); text-decoration: underline; text-underline-offset: 4px; }
.course-teacher { font-size: .9rem; color: var(--color-muted); margin-top: .25rem; }
.course-meta {
  display: flex; flex-wrap: wrap; gap: .4rem .9rem;
  margin-top: var(--space-4); font-size: .85rem; color: var(--color-muted);
}
.course-meta span { display: inline-flex; align-items: center; gap: .3rem; }
.course-meta .star { color: var(--color-warning); }
.course-foot {
  margin-top: auto; padding-top: var(--space-4);
  border-top: 1px dashed var(--color-border);
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); flex-wrap: wrap;
}
.price { display: flex; flex-direction: column; line-height: 1.2; }
.price strong { font-size: 1.15rem; font-weight: 900; color: var(--color-primary-ink); font-variant-numeric: tabular-nums; }
.price small { font-size: .75rem; color: var(--color-muted); }
.price.is-free strong { color: var(--color-success); }
.course-actions { display: flex; gap: var(--space-2); }
.seat-tag {
  position: absolute; top: var(--space-4); inset-inline-end: var(--space-4);
  font-size: .72rem; font-weight: 700; color: var(--color-warning);
  display: none;
}
.course.is-full .seat-tag { display: inline-block; }
.course.is-full .add-btn { background: var(--color-surface-2); color: var(--color-muted); border-color: var(--color-border); }

.add-btn { min-height: 42px; padding: .5rem 1rem; }
.add-btn.is-added { background: var(--color-success); }
.add-btn.is-added:hover { background: #2F6548; }

@keyframes card-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .course { animation: none; } .course:hover { transform: none; } }

.empty-state {
  text-align: center; padding: var(--space-8) var(--space-4);
  border: 1.5px dashed var(--color-border); border-radius: var(--radius-md);
  background: var(--color-surface); margin-top: var(--space-4);
  display: flex; flex-direction: column; align-items: center; gap: var(--space-3);
}
.empty-state[hidden] { display: none; }
.empty-title { font-size: var(--fs-h3); font-weight: 900; color: var(--color-primary-ink); }

/* ---------- Why ---------- */
.why { padding: var(--space-8) 0; }
.why-grid { display: grid; gap: var(--space-7); }
@media (min-width: 960px) { .why-grid { grid-template-columns: .8fr 1.2fr; gap: var(--space-9); align-items: start; } }
.why-intro { position: relative; }
.why-text { color: var(--color-muted); margin-top: var(--space-4); max-width: 46ch; }
.principles { display: grid; gap: var(--space-5); counter-reset: p; }
.principles li {
  display: grid; grid-template-columns: auto 1fr; gap: var(--space-4);
  padding-bottom: var(--space-5); border-bottom: 1px solid var(--color-border);
}
.principles li:last-child { border-bottom: 0; }
.principle-num {
  font-size: clamp(2rem, 1.5rem + 1.6vw, 3rem); font-weight: 900; line-height: 1;
  color: transparent; -webkit-text-stroke: 1.5px var(--color-primary); font-variant-numeric: tabular-nums;
}
.principles h3 { font-size: var(--fs-h3); font-weight: 900; color: var(--color-primary-ink); margin-bottom: .3rem; }
.principles p { color: var(--color-muted); }

/* ---------- Stories ---------- */
.stories { padding: var(--space-8) 0; background: var(--color-primary); color: var(--color-on-primary); }
.stories .section-title { color: var(--color-on-primary); }
.stories .eyebrow { color: #F3B39A; }
.stories .note-small { color: rgba(245,240,230,.72); }
.quotes { display: grid; gap: var(--space-4); }
@media (min-width: 760px) { .quotes { grid-template-columns: repeat(2, 1fr); } }
.quote {
  background: rgba(245,240,230,.06);
  border: 1px solid rgba(245,240,230,.16);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex; flex-direction: column; gap: var(--space-4);
}
.quote:nth-child(even) { transform: translateY(0); }
@media (min-width: 760px) { .quote:nth-child(2) { margin-top: var(--space-7); } }
.quote blockquote { margin: 0; font-size: clamp(1rem, .95rem + .3vw, 1.15rem); line-height: 1.9; }
.quote blockquote::before { content: "“"; display: block; font-size: 3.2rem; line-height: .6; color: var(--color-accent); font-weight: 900; }
.quote footer { font-size: .88rem; color: rgba(245,240,230,.75); display: flex; justify-content: space-between; gap: var(--space-3); flex-wrap: wrap; }
.quote footer b { color: var(--color-on-primary); }

/* ---------- FAQ ---------- */
.faq { padding: var(--space-8) 0; }
.faq-grid { display: grid; gap: var(--space-6); }
@media (min-width: 960px) { .faq-grid { grid-template-columns: .7fr 1.3fr; gap: var(--space-9); } }
.accordion { border-top: 2px solid var(--color-primary); }
.accordion details { border-bottom: 1px solid var(--color-border); }
.accordion summary {
  list-style: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-4);
  padding: var(--space-5) 0; font-weight: 900; font-size: clamp(1rem, .95rem + .3vw, 1.15rem); color: var(--color-primary-ink);
  min-height: 56px;
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after {
  content: "+"; flex: none; width: 36px; height: 36px; border-radius: 50%;
  border: 1.5px solid var(--color-primary); display: grid; place-items: center;
  font-size: 1.3rem; font-weight: 400; line-height: 1;
  transition: transform var(--dur-base) var(--ease-emphasis), background var(--dur-base), color var(--dur-base);
}
.accordion details[open] summary::after { transform: rotate(45deg); background: var(--color-primary); color: #fff; }
.accordion details p { padding: 0 0 var(--space-5); color: var(--color-muted); max-width: 66ch; }
.accordion .answer { overflow: hidden; }

/* ---------- Final CTA ---------- */
.final-cta { padding: var(--space-8) 0; background: var(--color-secondary); border-top: 1px solid var(--color-border); }
.cta-inner { display: grid; gap: var(--space-7); align-items: start; }
@media (min-width: 960px) { .cta-inner { grid-template-columns: 1fr 1fr; gap: var(--space-9); } }
.cta-title { font-size: var(--fs-h2); font-weight: 900; line-height: 1.3; color: var(--color-primary-ink); }
.cta-copy p { color: #3E4657; margin: var(--space-4) 0 var(--space-6); max-width: 48ch; }
.cta-copy .btn-light { background: var(--color-primary); color: var(--color-on-primary); }
.cta-copy .btn-light:hover { background: var(--color-primary-ink); color: var(--color-on-primary); }

.enroll-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: clamp(var(--space-5), 3vw, var(--space-6));
  display: grid; gap: var(--space-4);
}
.form-title { font-size: var(--fs-h3); font-weight: 900; color: var(--color-primary-ink); }
.form-row { display: grid; gap: var(--space-4); }
@media (min-width: 560px) { .form-row { grid-template-columns: 1fr 1fr; } }
.form-note { font-size: .8rem; color: var(--color-muted); text-align: center; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-primary-ink); color: #C9D0DC; padding: var(--space-8) 0 var(--space-5); }
.footer-grid { display: grid; gap: var(--space-6); grid-template-columns: 1fr 1fr; }
@media (min-width: 900px) { .footer-grid { grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: var(--space-7); } }
.brand-footer { color: var(--color-on-primary); }
.brand-footer:hover { color: var(--color-on-primary); }
.brand-footer small { color: #9FB0C8; }
.footer-about { margin-top: var(--space-4); font-size: .9rem; max-width: 40ch; color: #AEB9CA; }
.footer-title { font-size: .95rem; color: var(--color-on-primary); margin-bottom: var(--space-3); }
.site-footer ul { display: grid; gap: .55rem; }
.site-footer a { color: #C9D0DC; font-size: .95rem; padding-block: .25rem; display: inline-block; }
.site-footer a:hover { color: #F3B39A; }
.footer-bottom {
  margin-top: var(--space-7); padding-top: var(--space-5);
  border-top: 1px solid rgba(245,240,230,.14);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-3);
  font-size: .85rem; color: #93A1B8;
}

/* ---------- Mobile bottom bar ---------- */
.bottom-bar {
  position: fixed; inset-inline: 0; bottom: 0; z-index: var(--z-bottom);
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: color-mix(in srgb, var(--color-surface) 94%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-border);
  padding: 6px 6px calc(6px + env(safe-area-inset-bottom));
}
.bb-item {
  position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  min-height: 56px; border: 0; background: none; color: var(--color-muted);
  font-size: .75rem; font-weight: 700; border-radius: var(--radius-md);
  transition: color var(--dur-base), background var(--dur-base);
}
.bb-item svg { width: 22px; height: 22px; }
.bb-item:hover, .bb-item:focus-visible { color: var(--color-primary-ink); }
.bb-item:active { background: var(--color-surface-2); }
.bb-count {
  position: absolute; top: 4px; left: calc(50% + 6px);
  min-width: 18px; height: 18px; border-radius: var(--radius-pill); background: var(--color-accent); color: #fff;
  font-size: .68rem; display: grid; place-items: center; padding: 0 4px;
}
@media (min-width: 900px) { .bottom-bar { display: none; } }

/* ---------- Quick view dialog ---------- */
.qv {
  width: min(680px, calc(100% - 2 * var(--space-4)));
  max-height: calc(100vh - 2 * var(--space-5));
  border: 0; padding: 0; border-radius: var(--radius-lg);
  background: var(--color-surface); color: var(--color-text);
  box-shadow: var(--shadow-lg);
  overflow: auto;
  margin: auto;
}
.qv::backdrop { background: rgba(20,39,66,.55); backdrop-filter: blur(3px); }
.qv[open] { animation: qv-in var(--dur-base) var(--ease-emphasis); }
@keyframes qv-in { from { opacity: 0; transform: translateY(12px) scale(.98); } to { opacity: 1; transform: none; } }
.qv-close-wrap { position: absolute; top: var(--space-3); inset-inline-start: var(--space-3); z-index: 2; }
.qv-close-wrap .icon-btn { background: var(--color-surface); }
.qv-body { padding: var(--space-6); padding-top: var(--space-7); }
.qv-subject { font-size: .8rem; font-weight: 700; color: var(--color-accent-ink); }
.qv-title { font-size: clamp(1.4rem, 1.1rem + 1vw, 1.9rem); font-weight: 900; color: var(--color-primary-ink); line-height: 1.4; margin-top: .3rem; }
.qv-desc { margin-top: var(--space-4); color: var(--color-muted); }
.qv-specs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; margin: var(--space-5) 0; border-top: 1px solid var(--color-border); }
.qv-specs div { padding: var(--space-3) 0; border-bottom: 1px solid var(--color-border); }
.qv-specs dt { font-size: .8rem; color: var(--color-muted); }
.qv-specs dd { font-weight: 700; color: var(--color-primary-ink); }
.qv-syllabus { list-style: none; counter-reset: s; margin: var(--space-4) 0 0; display: grid; gap: .5rem; }
.qv-syllabus li { counter-increment: s; display: flex; gap: .7rem; align-items: baseline; color: var(--color-text); }
.qv-syllabus .n { font-weight: 900; color: var(--color-accent-ink); min-width: 1.6em; }
.qv-foot { display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); flex-wrap: wrap; margin-top: var(--space-6); padding-top: var(--space-5); border-top: 1px solid var(--color-border); }
.qv-foot .btn { min-width: 200px; }
.qv-foot .btn:disabled { opacity: 1; }
.qv h3 { font-size: 1rem; font-weight: 900; color: var(--color-primary-ink); }

/* ---------- Cart drawer ---------- */
.drawer { inset: 0; z-index: var(--z-drawer); pointer-events: none; visibility: hidden; transition: visibility var(--dur-slow); }
.drawer.is-open { pointer-events: auto; visibility: visible; }
.drawer-panel {
  position: absolute; top: 0; bottom: 0; inset-inline-end: 0;
  width: min(440px, 100%);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column;
  transform: translateX(102%);
  transition: transform var(--dur-slow) var(--ease-emphasis);
}
.drawer.is-open .drawer-panel { transform: none; }
.drawer-head { display: flex; justify-content: space-between; align-items: center; padding: var(--space-5); border-bottom: 1px solid var(--color-border); }
.drawer-head h2 { font-size: 1.2rem; font-weight: 900; color: var(--color-primary-ink); }
.drawer-body { flex: 1; overflow: auto; padding: var(--space-4) var(--space-5); }
.cart-list { display: grid; gap: var(--space-3); }
.cart-item {
  display: grid; grid-template-columns: 1fr auto; gap: var(--space-2) var(--space-3);
  padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-background);
  animation: card-in var(--dur-base) var(--ease-emphasis) both;
}
.cart-item strong { color: var(--color-primary-ink); line-height: 1.5; }
.cart-item small { color: var(--color-muted); display: block; }
.cart-item .cart-price { font-weight: 900; color: var(--color-primary-ink); font-variant-numeric: tabular-nums; text-align: left; white-space: nowrap; }
.cart-item .remove { grid-column: 1 / -1; justify-self: start; min-height: 36px; font-size: .85rem; }
.cart-empty { display: none; text-align: center; padding: var(--space-8) var(--space-4); color: var(--color-muted); }
.cart-empty.is-visible { display: block; }
.drawer-foot { border-top: 1px solid var(--color-border); padding: var(--space-5); display: grid; gap: var(--space-4); }
.cart-total { display: flex; justify-content: space-between; align-items: baseline; }
.cart-total strong { font-size: 1.3rem; font-weight: 900; color: var(--color-primary-ink); font-variant-numeric: tabular-nums; }
.cart-note { font-size: .8rem; color: var(--color-muted); text-align: center; }

.scrim { position: fixed; inset: 0; background: rgba(20,39,66,.5); z-index: var(--z-scrim); animation: fade-in var(--dur-base) both; }
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }

/* ---------- Toasts ---------- */
.toasts {
  inset-inline: 0; bottom: 84px; z-index: var(--z-toast);
  display: grid; justify-items: center; gap: var(--space-2);
  pointer-events: none; padding-inline: var(--space-4);
}
@media (min-width: 900px) { .toasts { bottom: var(--space-5); } }
.toast {
  pointer-events: auto;
  background: var(--color-primary-ink); color: var(--color-on-primary);
  padding: .8rem 1.1rem; border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg); font-weight: 700; font-size: .95rem;
  max-width: min(480px, 100%);
  display: flex; align-items: center; gap: .6rem;
  animation: toast-in var(--dur-base) var(--ease-emphasis) both;
}
.toast::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #7FD1A2; flex: none; }
.toast.is-error::before { background: #F28B82; }
.toast.is-out { animation: toast-out var(--dur-base) var(--ease-standard) forwards; }
@keyframes toast-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
@keyframes toast-out { to { opacity: 0; transform: translateY(8px); } }

/* ---------- Responsive typography & tiny screens ---------- */
@media (max-width: 380px) {
  .brand-text small { display: none; }
  .hero-stats { gap: var(--space-4); }
  .tabs [role="tab"] { padding-inline: .7rem; font-size: .92rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .marquee-track { animation: none !important; }
}

/* Print: keep it clean */
@media print {
  .site-header, .bottom-bar, .drawer, .toasts, .scrim, .qv, .toolbar, .chips, .site-footer { display: none !important; }
  body { background: #fff; padding: 0; }
}