:root {
  --bg: oklch(1 0 0);
  --surface: oklch(0.965 0.01 33);
  --ink: oklch(0.2 0.02 320);
  --muted: oklch(0.42 0.02 320);
  --primary: oklch(0.47 0.15 322);
  --primary-deep: oklch(0.37 0.135 322);
  --accent: oklch(0.5 0.11 250);
  --line: oklch(0.9 0.012 320);
  --hero-ink: oklch(0.985 0.005 300);
  --shadow: 0 1.5rem 3rem oklch(0.22 0.025 33 / 0.08);
  --radius: 0.65rem;
  --radius-lg: 0.9rem;
  --shell: min(1120px, calc(100% - 2.5rem));
  --font-display: "Markazi Text", "Vazirmatn", serif;
  --font-body: "Vazirmatn", Tahoma, sans-serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --z-sticky: 40;
  --z-bar: 50;
  --mobile-bar-h: 0px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.8;
  font-weight: 400;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  padding-bottom: var(--mobile-bar-h);
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }

h1, h2, h3 { text-wrap: balance; line-height: 1.25; }
p { text-wrap: pretty; }

.shell { width: var(--shell); margin-inline: auto; }

.skip-link {
  position: absolute;
  inset-inline-start: 1rem;
  top: -4rem;
  z-index: 100;
  background: var(--ink);
  color: var(--bg);
  padding: 0.6rem 1rem;
  border-radius: var(--radius);
}
.skip-link:focus { top: 1rem; }

/* Announcements ticker */
.announce {
  background: var(--ink);
  color: var(--hero-ink);
  font-size: 0.85rem;
}
.announce-inner {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-height: 2.75rem;
}
.announce-flag {
  flex-shrink: 0;
  font-weight: 700;
  color: oklch(0.78 0.11 300);
  font-size: 0.8rem;
  padding-inline-end: 0.85rem;
  border-inline-end: 1px solid oklch(1 0 0 / 0.2);
}
.announce-track {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: none;
  padding-block: 0.5rem;
}
.announce-track::-webkit-scrollbar { display: none; }
.announce-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
  scroll-snap-align: start;
  color: oklch(0.96 0.005 90 / 0.92);
  transition: color 0.2s var(--ease-out);
}
.announce-item:hover { color: var(--hero-ink); }
.announce-tag {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--hero-ink);
  background: linear-gradient(135deg, oklch(0.5 0.15 322), oklch(0.5 0.11 250));
  padding: 0.12rem 0.55rem;
  border-radius: 999px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: oklch(1 0 0 / 0.94);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(12px);
  transition: border-color 0.3s var(--ease-out);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-height: 4rem;
}
.brand { display: flex; align-items: center; gap: 0.7rem; min-width: 0; }
.brand-badge {
  width: 3.25rem; height: 3.25rem;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 0.65rem;
  background: radial-gradient(circle at 35% 30%, oklch(0.26 0.07 322), oklch(0.1 0.02 300));
  overflow: hidden;
}
.brand-badge img {
  width: auto;
  height: 2.35rem;
  max-width: 2.5rem;
  max-height: 2.5rem;
  object-fit: contain;
  object-position: center;
}
.brand-text { display: flex; flex-direction: column; gap: 0.05rem; line-height: 1.2; }
.brand-name { font-family: var(--font-display); font-size: 1.45rem; font-weight: 700; letter-spacing: -0.02em; }
.brand-sub { font-size: 0.7rem; color: var(--muted); font-weight: 500; }

.nav-links { display: flex; align-items: center; gap: 1.15rem; font-size: 0.9rem; font-weight: 500; color: var(--muted); }
.nav-links a { transition: color 0.2s var(--ease-out); }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--ink); }

.nav-actions { display: flex; align-items: center; gap: 0.45rem; }
.nav-toggle {
  display: none;
  width: 2.75rem; height: 2.75rem;
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: var(--radius);
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.35rem;
}
.nav-toggle span { display: block; width: 1.05rem; height: 1.5px; background: var(--ink); transition: transform 0.25s var(--ease-out); }
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(2.5px) rotate(-45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-2.5px) rotate(45deg); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0.65rem 1.1rem;
  min-height: 2.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.25s var(--ease-out), color 0.25s var(--ease-out), border-color 0.25s var(--ease-out), transform 0.25s var(--ease-out);
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}
.btn:focus-visible,
.nav-links a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.nav-toggle:focus-visible,
.announce-item:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.btn-primary { background: var(--primary); color: var(--hero-ink); }
.btn-primary:hover { background: var(--primary-deep); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-outline { background: var(--bg); color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--hero-ink); }
.btn-light { background: oklch(1 0 0 / 0.14); color: var(--hero-ink); border-color: oklch(1 0 0 / 0.4); }
.btn-light:hover { background: oklch(1 0 0 / 0.22); }
.btn-lg { padding: 0.9rem 1.35rem; font-size: 0.95rem; min-height: 3.1rem; }
.btn-sm { padding: 0.45rem 0.9rem; min-height: 2.35rem; font-size: 0.82rem; }

/* Hero */
.hero {
  position: relative;
  min-height: min(70vh, 38rem);
  display: grid;
  align-items: center;
  color: var(--hero-ink);
  overflow: clip;
  background:
    radial-gradient(circle at 78% 25%, oklch(0.3 0.11 322 / 0.55), transparent 55%),
    linear-gradient(135deg, oklch(0.18 0.05 322), oklch(0.1 0.02 300) 55%, oklch(0.17 0.05 250));
}
.hero-art { position: absolute; inset: 0; }
.hero-keys {
  position: absolute;
  inset: auto 0 0 0;
  height: 45%;
  background-image: repeating-linear-gradient(
    90deg,
    oklch(1 0 0 / 0.06) 0 2.2rem,
    oklch(1 0 0 / 0.14) 2.2rem 2.35rem
  );
  mask-image: linear-gradient(0deg, oklch(0 0 0) 0%, transparent 100%);
  -webkit-mask-image: linear-gradient(0deg, oklch(0 0 0) 0%, transparent 100%);
}
.hero-glow {
  position: absolute;
  inset-block-start: -20%;
  inset-inline-end: -10%;
  width: 40rem; height: 40rem;
  background: radial-gradient(circle, oklch(0.5 0.16 322 / 0.3), transparent 60%);
  filter: blur(10px);
}
.hero-content {
  position: relative;
  z-index: 1;
  padding-block: clamp(3.5rem, 9vh, 6rem);
  max-width: 42rem;
}
.hero-title { font-family: var(--font-display); font-size: clamp(2.15rem, 5vw, 3.7rem); font-weight: 700; letter-spacing: -0.03em; max-width: 16ch; margin-bottom: 0.85rem; }
.hero-lead { font-size: 1rem; font-weight: 300; line-height: 1.9; max-width: 44ch; color: oklch(0.95 0.01 90 / 0.92); margin-bottom: 1.5rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.65rem; }

/* Trust */
.trust {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: -1px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.trust-item { background: var(--bg); padding: 1.15rem 1rem; display: grid; gap: 0.2rem; }
.trust-item strong { font-family: var(--font-display); font-size: 1.4rem; font-weight: 700; color: var(--primary); }
.trust-item span { font-size: 0.85rem; color: var(--muted); }

/* Sections */
.section { padding-block: clamp(3.25rem, 7vw, 5.5rem); }
.section-tint { background: linear-gradient(180deg, var(--surface), var(--bg)); }
.section-head { max-width: 42rem; margin-bottom: clamp(1.6rem, 3.5vw, 2.5rem); }
.section-head h2 { font-family: var(--font-display); font-size: clamp(1.9rem, 3.4vw, 2.75rem); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 0.55rem; }
.section-head p { color: var(--muted); font-size: 0.98rem; max-width: 52ch; }

/* Groups */
.groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
}
.group {
  border: 1px solid var(--line);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.group:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.group-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1.15rem;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.group-head h3 { font-family: var(--font-display); font-size: 1.4rem; font-weight: 700; }
.group-icon {
  width: 2.25rem; height: 2.25rem;
  display: grid; place-items: center;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 1rem;
  color: var(--primary);
}
.teacher-list { list-style: none; display: flex; flex-direction: column; }
.teacher {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.95rem 1.15rem;
  border-bottom: 1px solid var(--line);
}
.teacher:last-child { border-bottom: 0; }
.teacher-info { display: flex; flex-direction: column; gap: 0.15rem; min-width: 0; }
.teacher-name { font-weight: 700; font-size: 1rem; }
.teacher-day { font-size: 0.85rem; color: var(--muted); }
.register-btn.is-selected { background: var(--primary); color: var(--hero-ink); }

/* Registration */
.register-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr);
  gap: clamp(1.25rem, 3.5vw, 2.5rem);
  align-items: start;
}
.register-form { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: clamp(1.15rem, 2.5vw, 1.6rem); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.9rem; margin-bottom: 1rem; }
.field { display: grid; gap: 0.3rem; }
.field-full { grid-column: 1 / -1; }
label { font-size: 0.85rem; font-weight: 600; color: var(--ink); }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 0.8rem 0.85rem;
  min-height: 2.9rem;
  transition: border-color 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}
input::placeholder, textarea::placeholder { color: oklch(0.55 0.015 33); }
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px oklch(0.48 0.155 33 / 0.12);
  outline: none;
}
textarea { resize: vertical; min-height: 6rem; }
.form-submit { width: 100%; }
.form-status { min-height: 1.4em; margin-top: 0.7rem; font-size: 0.9rem; color: var(--primary); font-weight: 600; }

.register-aside { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 1.25rem; }
.register-aside h3 { font-family: var(--font-display); font-size: 1.4rem; margin-bottom: 0.85rem; }
.steps { padding-inline-start: 1.15rem; display: grid; gap: 0.55rem; color: var(--muted); font-size: 0.92rem; }
.aside-contact { margin-top: 1.25rem; padding-top: 1.1rem; border-top: 1px solid var(--line); }
.aside-contact p { font-size: 0.85rem; color: var(--muted); margin-bottom: 0.35rem; }
.phone-link { display: block; font-weight: 700; color: var(--ink); direction: ltr; text-align: start; }
.phone-link:hover { color: var(--primary); }

/* Empty state (packages) */
.empty-state {
  border: 1px dashed var(--line);
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: clamp(2.5rem, 6vw, 4rem) 1.5rem;
  text-align: center;
  display: grid;
  gap: 0.4rem;
  justify-items: center;
}
.empty-icon { font-size: 2.25rem; }
.empty-title { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; }
.empty-sub { color: var(--muted); font-size: 0.95rem; }

/* Location */
.location-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr);
  gap: clamp(1.25rem, 3.5vw, 2rem);
  align-items: stretch;
}
.map-frame { border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; min-height: 20rem; background: var(--surface); }
.map-frame iframe { width: 100%; height: 100%; min-height: 20rem; border: 0; display: block; }
.location-aside {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.location-aside h3 { font-family: var(--font-display); font-size: 1.4rem; }
.location-aside p { color: var(--muted); font-size: 0.94rem; }

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}
.contact-card {
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 1.35rem 1.25rem;
  display: grid;
  gap: 0.35rem;
  justify-items: start;
}
.contact-icon { font-size: 1.5rem; }
.contact-card h3 { font-family: var(--font-display); font-size: 1.3rem; }
.contact-card p { color: var(--muted); font-size: 0.94rem; }

/* Footer */
.site-footer {
  padding-block: 2rem;
  background:
    radial-gradient(circle at 80% 0%, oklch(0.25 0.08 322 / 0.6), transparent 55%),
    var(--ink);
  color: oklch(0.9 0.01 300 / 0.85);
}
.footer-inner { display: flex; justify-content: space-between; gap: 1.25rem; flex-wrap: wrap; align-items: center; font-size: 0.85rem; }
.footer-brand { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.footer-logo { width: auto; height: 4.75rem; object-fit: contain; object-position: center; mix-blend-mode: screen; }
.footer-inner nav { display: flex; gap: 1.15rem; }
.footer-inner nav a { color: oklch(0.85 0.02 300 / 0.8); }
.footer-inner nav a:hover { color: var(--hero-ink); }

/* Mobile sticky bar */
.mobile-bar { display: none; }

/* Motion */
.reveal { animation: rise 0.9s var(--ease-out) both; }
.hero-content .reveal:nth-child(1) { animation-delay: 0.05s; }
.hero-content .reveal:nth-child(2) { animation-delay: 0.16s; }
.hero-content .reveal:nth-child(3) { animation-delay: 0.28s; }
.hero-content .reveal:nth-child(4) { animation-delay: 0.4s; }

@keyframes rise {
  from { opacity: 0; transform: translateY(0.9rem); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Tablet */
@media (max-width: 960px) {
  :root { --shell: min(1120px, calc(100% - 1.75rem)); }
  .hide-sm { display: none !important; }
  .nav-links {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 0.35rem 0.25rem 0.85rem;
    box-shadow: var(--shadow);
  }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: 0.95rem 0.65rem; border-bottom: 1px solid var(--line); font-size: 1rem; color: var(--ink); }
  .nav-links a:last-child { border-bottom: 0; }
  .nav-toggle { display: inline-flex; }
  .trust { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .register-layout, .location-layout { grid-template-columns: 1fr; }
  .mobile-bar {
    display: grid;
    grid-template-columns: 1fr 1.35fr;
    gap: 0.55rem;
    position: fixed;
    inset-inline: 0;
    bottom: 0;
    z-index: var(--z-bar);
    padding: 0.65rem 0.85rem calc(0.65rem + env(safe-area-inset-bottom));
    background: oklch(1 0 0 / 0.96);
    border-top: 1px solid var(--line);
    backdrop-filter: blur(10px);
  }
  :root { --mobile-bar-h: calc(4.4rem + env(safe-area-inset-bottom)); }
}

/* Phone */
@media (max-width: 640px) {
  :root { --shell: min(1120px, calc(100% - 1.25rem)); }
  .nav { min-height: 3.65rem; }
  .brand-name { font-size: 1.3rem; }
  .hero { min-height: 62vh; }
  .hero-title { max-width: none; font-size: clamp(2rem, 9vw, 2.55rem); }
  .hero-lead { font-size: 0.95rem; max-width: none; }
  .hero-actions { width: 100%; }
  .hero-actions .btn { flex: 1 1 100%; }
  .section { padding-block: 2.75rem; }
  .section-head { margin-bottom: 1.35rem; }
  .trust-item { padding: 1rem 0.85rem; }
  .trust-item strong { font-size: 1.2rem; }
  .form-grid { grid-template-columns: 1fr; }
  .groups { grid-template-columns: 1fr; }
  .announce-flag { display: none; }
}

/* Blog */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.blog-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.blog-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.blog-card-media {
  display: block;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, oklch(0.22 0.06 322), oklch(0.12 0.02 300));
  display: grid;
  place-items: center;
  overflow: hidden;
}
.blog-card-media img { width: 100%; height: 100%; object-fit: cover; }
.blog-card-placeholder { font-size: 2.5rem; color: oklch(1 0 0 / 0.5); }
.blog-card-body { padding: 1.1rem 1.15rem 1.25rem; display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }
.blog-card-date { font-size: 0.8rem; color: var(--muted); }
.blog-card-body h3 { font-family: var(--font-display); font-size: 1.35rem; font-weight: 700; line-height: 1.3; }
.blog-card-body h3 a { transition: color 0.2s var(--ease-out); }
.blog-card-body h3 a:hover { color: var(--primary); }
.blog-card-body p { color: var(--muted); font-size: 0.92rem; }
.blog-card-more { margin-top: auto; color: var(--primary); font-weight: 600; font-size: 0.9rem; }

.blog-pagination { margin-top: 2rem; display: flex; justify-content: center; }
.blog-pagination a, .blog-pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 2.4rem; padding: 0.3rem 0.6rem;
}

/* Blog post */
.blog-post { max-width: 46rem; }
.blog-back { display: inline-block; color: var(--muted); font-weight: 600; margin-bottom: 1.25rem; }
.blog-back:hover { color: var(--primary); }
.blog-post-head h1 { font-family: var(--font-display); font-size: clamp(1.9rem, 4vw, 2.9rem); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 0.5rem; }
.blog-post-cover { width: 100%; border-radius: var(--radius-lg); margin: 1.5rem 0; border: 1px solid var(--line); }
.blog-post-body { line-height: 2; font-size: 1.02rem; }
.prose h2, .prose h3 { font-family: var(--font-display); margin: 1.4rem 0 0.6rem; line-height: 1.3; }
.prose h2 { font-size: 1.6rem; }
.prose h3 { font-size: 1.3rem; }
.prose p { margin-bottom: 1rem; }
.prose ul, .prose ol { margin: 0 1.5rem 1rem; display: grid; gap: 0.35rem; }
.prose a { color: var(--primary); text-decoration: underline; }
.prose img { max-width: 100%; height: auto; border-radius: var(--radius); margin: 1rem 0; }
.prose blockquote { border-inline-start: 3px solid var(--primary); padding-inline-start: 1rem; color: var(--muted); margin: 1rem 0; }

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}
.gallery-item {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
}
.gallery-item img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; display: block; transition: transform 0.4s var(--ease-out); }
.gallery-item:hover img { transform: scale(1.04); }
.gallery-item figcaption { padding: 0.6rem 0.75rem; font-size: 0.85rem; color: var(--muted); }