/* =============================================================
   AETHRIS INTERNATIONAL SCHOOL — Design System / Theme
   Luxury navy · midnight blue · academic gold · pearl ivory
   ============================================================= */

/* ---------- Design Tokens ---------- */
:root {
  /* Brand palette */
  --navy-950: #04070F;
  --navy-900: #060B1A;
  --navy-850: #081026;
  --navy-800: #0A1329;
  --navy-700: #0E1B3E;
  --navy-600: #142a5c;
  --navy-500: #1d3a78;
  --navy-400: #2b4f96;

  --gold-600: #B08528;
  --gold-500: #C9A24B;
  --gold-400: #D8B65E;
  --gold-300: #E7CE86;
  --gold-200: #F0DEA9;
  --gold-glow: rgba(201, 162, 75, 0.35);

  --ivory: #F6F1E7;
  --pearl: #FBF9F4;
  --white: #FFFFFF;

  /* Semantic (dark default) */
  --bg: var(--navy-950);
  --bg-elev: var(--navy-850);
  --bg-soft: rgba(255, 255, 255, 0.03);
  --surface: rgba(18, 28, 56, 0.55);
  --surface-2: rgba(12, 20, 44, 0.75);
  --border: rgba(201, 162, 75, 0.16);
  --border-soft: rgba(255, 255, 255, 0.08);
  --text: #EAF0FF;
  --text-soft: #B7C2DC;
  --text-mut: #8492b4;
  --heading: #FFFFFF;
  --accent: var(--gold-500);
  --accent-bright: var(--gold-300);

  /* Effects */
  --glass-blur: 18px;
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --shadow-sm: 0 4px 18px rgba(2, 6, 20, 0.35);
  --shadow: 0 18px 50px -12px rgba(2, 6, 20, 0.6);
  --shadow-lg: 0 40px 90px -30px rgba(0, 0, 0, 0.75);
  --shadow-gold: 0 20px 60px -18px rgba(201, 162, 75, 0.4);

  /* Gradients */
  --grad-gold: linear-gradient(135deg, var(--gold-300) 0%, var(--gold-500) 45%, var(--gold-600) 100%);
  --grad-navy: linear-gradient(160deg, var(--navy-800) 0%, var(--navy-950) 100%);
  --grad-ink: linear-gradient(180deg, rgba(6, 11, 26, 0) 0%, rgba(4, 7, 15, 0.85) 100%);
  --grad-sheen: linear-gradient(115deg, transparent 30%, rgba(255, 255, 255, 0.18) 48%, transparent 66%);

  /* Type */
  --font-display: "Fraunces", "Cormorant Garamond", "Playfair Display", Georgia, serif;
  --font-sans: "Inter", "Sora", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "Space Mono", ui-monospace, "SFMono-Regular", monospace;

  /* Layout */
  --container: 1240px;
  --container-wide: 1480px;
  --nav-h: 78px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* Light theme */
[data-theme="light"] {
  --bg: #F4EFE4;
  --bg-elev: #FBF9F4;
  --bg-soft: rgba(10, 19, 41, 0.03);
  --surface: rgba(255, 255, 255, 0.75);
  --surface-2: rgba(255, 255, 255, 0.92);
  --border: rgba(176, 133, 40, 0.28);
  --border-soft: rgba(10, 19, 41, 0.1);
  --text: #1a2338;
  --text-soft: #40506f;
  --text-mut: #6b7897;
  --heading: #0A1329;
  --accent: var(--gold-600);
  --accent-bright: var(--gold-600);
  --grad-navy: linear-gradient(160deg, #FBF9F4 0%, #EDE6D6 100%);
  --grad-ink: linear-gradient(180deg, rgba(246, 241, 231, 0) 0%, rgba(246, 241, 231, 0.9) 100%);
  --shadow: 0 18px 50px -14px rgba(30, 40, 70, 0.22);
  --shadow-lg: 0 40px 90px -34px rgba(30, 40, 70, 0.3);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  min-height: 100vh;
}
img, video, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
ul, ol { list-style: none; }
::selection { background: var(--gold-glow); color: var(--white); }

/* Scrollbar */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--navy-950); }
::-webkit-scrollbar-thumb { background: linear-gradient(var(--gold-600), var(--navy-600)); border-radius: 20px; border: 2px solid var(--navy-950); }
[data-theme="light"] ::-webkit-scrollbar-track { background: #E7DFCE; }
[data-theme="light"] ::-webkit-scrollbar-thumb { border-color: #E7DFCE; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--heading); font-weight: 500; line-height: 1.08; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.6rem, 6vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.4rem); }
h3 { font-size: clamp(1.4rem, 2.2vw, 2rem); }
h4 { font-size: 1.25rem; }
p { color: var(--text-soft); }

.display {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.02em;
}
.serif { font-family: var(--font-display); }
.italic { font-style: italic; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--accent);
}
.eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent));
}
.eyebrow.center::before { display: none; }

.gold-text {
  background: var(--grad-gold);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}
.lede { font-size: clamp(1.05rem, 1.5vw, 1.28rem); color: var(--text-soft); line-height: 1.7; }
.muted { color: var(--text-mut); }

/* ---------- Layout helpers ---------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: clamp(20px, 5vw, 48px); }
.container.wide { max-width: var(--container-wide); }
.section { padding-block: clamp(72px, 10vw, 140px); position: relative; }
.section.tight { padding-block: clamp(48px, 6vw, 84px); }
.center { text-align: center; }
.grid { display: grid; gap: clamp(18px, 2.4vw, 30px); }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }
.flex { display: flex; }
.between { justify-content: space-between; }
.items-center { align-items: center; }
.gap-sm { gap: 10px; } .gap { gap: 18px; } .gap-lg { gap: 30px; }
.wrap { flex-wrap: wrap; }
.stack > * + * { margin-top: 1rem; }
.mx-auto { margin-inline: auto; }
.maxw-xl { max-width: 720px; }
.maxw-lg { max-width: 620px; }
.relative { position: relative; }
.hidden { display: none !important; }

@media (max-width: 980px) {
  .cols-4 { grid-template-columns: repeat(2, 1fr); }
  .cols-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .cols-2, .cols-3, .cols-4 { grid-template-columns: 1fr; }
}

/* ---------- Section header ---------- */
.section-head { max-width: 760px; margin-bottom: clamp(36px, 5vw, 64px); }
.section-head.center { margin-inline: auto; }
.section-head h2 { margin-top: 14px; }
.section-head p { margin-top: 16px; font-size: 1.08rem; }

/* ---------- Buttons ---------- */
.btn {
  --_bg: var(--grad-gold);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  padding: 0.92em 1.7em;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 100px;
  color: var(--navy-950);
  background: var(--_bg);
  border: 1px solid transparent;
  overflow: hidden;
  isolation: isolate;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), filter 0.3s;
  box-shadow: var(--shadow-gold);
  will-change: transform;
}
.btn::after {
  content: "";
  position: absolute; inset: 0;
  background: var(--grad-sheen);
  transform: translateX(-120%);
  transition: transform 0.7s var(--ease);
  z-index: -1;
}
.btn:hover { transform: translateY(-3px); filter: brightness(1.06); }
.btn:hover::after { transform: translateX(120%); }
.btn:active { transform: translateY(-1px) scale(0.99); }

.btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: none;
  backdrop-filter: blur(8px);
}
.btn.ghost:hover { border-color: var(--accent); color: var(--accent-bright); background: rgba(201,162,75,0.06); }
.btn.dark { background: var(--navy-800); color: var(--white); box-shadow: var(--shadow-sm); }
.btn.dark:hover { background: var(--navy-700); }
.btn.sm { padding: 0.6em 1.1em; font-size: 0.8rem; }
.btn.lg { padding: 1.05em 2.1em; font-size: 0.98rem; }
.btn.block { width: 100%; }
.btn .arrow { transition: transform 0.4s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

.link-arrow {
  display: inline-flex; align-items: center; gap: 0.5em;
  font-weight: 600; font-size: 0.9rem; color: var(--accent-bright);
  transition: gap 0.3s var(--ease);
}
.link-arrow:hover { gap: 0.9em; }
.link-arrow svg { width: 16px; height: 16px; }

/* Inline icon placeholders */
i[data-ic] { display: inline-flex; align-items: center; justify-content: center; }
i[data-ic] svg { width: 1em; height: 1em; }
.btn i[data-ic] svg { width: 1.05em; height: 1.05em; transition: transform 0.4s var(--ease); }
.btn:hover i[data-ic="arrow"] svg { transform: translateX(4px); }

/* ---------- Glass / cards ---------- */
.glass {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 3vw, 34px);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform 0.5s var(--ease), border-color 0.5s, box-shadow 0.5s;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, rgba(201,162,75,0.5), transparent 40%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--border); }
.card:hover::before { opacity: 1; }

.chip {
  display: inline-flex; align-items: center; gap: 0.5em;
  padding: 0.45em 0.95em;
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  border-radius: 100px;
  background: rgba(201,162,75,0.1);
  border: 1px solid var(--border);
  color: var(--accent-bright);
}
.chip.solid { background: var(--grad-gold); color: var(--navy-950); border-color: transparent; }
.chip.neutral { background: var(--bg-soft); border-color: var(--border-soft); color: var(--text-soft); }

.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--border), transparent); border: 0; margin-block: clamp(40px, 6vw, 80px); }

/* ---------- Background decorations ---------- */
.bg-mesh { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.bg-mesh img { position: absolute; opacity: 0.5; mix-blend-mode: screen; }
[data-theme="light"] .bg-mesh img { mix-blend-mode: multiply; opacity: 0.35; }
.bg-grid {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image: url("../../Images/backgrounds/grid.webp");
  background-size: 640px; opacity: 0.05;
}
.bg-noise::after {
  content: ""; position: fixed; inset: 0; z-index: 9999; pointer-events: none;
  background-image: url("../../Images/backgrounds/noise.webp");
  background-size: 260px; opacity: 0.035; mix-blend-mode: overlay;
}
.orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.5; pointer-events: none; z-index: 0; }
.orb.gold { background: radial-gradient(circle, rgba(201,162,75,0.55), transparent 70%); }
.orb.blue { background: radial-gradient(circle, rgba(43,79,150,0.6), transparent 70%); }

/* ---------- Reveal animations ---------- */
[data-reveal] { opacity: 0; transform: translateY(34px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); will-change: opacity, transform; }
[data-reveal="left"] { transform: translateX(-40px); }
[data-reveal="right"] { transform: translateX(40px); }
[data-reveal="scale"] { transform: scale(0.94); }
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal-delay="1"] { transition-delay: 0.08s; }
[data-reveal-delay="2"] { transition-delay: 0.16s; }
[data-reveal-delay="3"] { transition-delay: 0.24s; }
[data-reveal-delay="4"] { transition-delay: 0.32s; }
[data-reveal-delay="5"] { transition-delay: 0.4s; }
[data-reveal-delay="6"] { transition-delay: 0.48s; }

@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
@keyframes spin-slow { to { transform: rotate(360deg); } }
@keyframes pulse-ring { 0% { box-shadow: 0 0 0 0 var(--gold-glow); } 70% { box-shadow: 0 0 0 18px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }
@keyframes shimmer { to { background-position: 200% center; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: none; } }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Image frames ---------- */
.img-frame { position: relative; overflow: hidden; border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.img-frame img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease); }
.img-frame:hover img { transform: scale(1.06); }
.img-frame.hover-lift { transition: transform 0.5s var(--ease); }
.img-frame.hover-lift:hover { transform: translateY(-6px); }
.ratio-1 { aspect-ratio: 1 / 1; }
.ratio-43 { aspect-ratio: 4 / 3; }
.ratio-32 { aspect-ratio: 3 / 2; }
.ratio-169 { aspect-ratio: 16 / 9; }
.ratio-photo { aspect-ratio: 3 / 4; }
.overlay-grad::after { content:""; position:absolute; inset:0; background: var(--grad-ink); }

/* accessibility */
.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; }
:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 3px; border-radius: 4px; }
.skip-link { position: fixed; top: -60px; left: 16px; z-index: 10000; background: var(--gold-500); color: var(--navy-950); padding: 10px 18px; border-radius: 8px; font-weight: 700; transition: top 0.3s; }
.skip-link:focus { top: 16px; }

/* ---------- RTL / Arabic ---------- */
.is-rtl {
  --font-display: "Cairo", "Tajawal", "Segoe UI", sans-serif;
  --font-sans: "Cairo", "Tajawal", "Segoe UI", sans-serif;
}
[dir="rtl"] h1, [dir="rtl"] h2, [dir="rtl"] h3, [dir="rtl"] h4 { letter-spacing: 0; line-height: 1.25; }
[dir="rtl"] .eyebrow { letter-spacing: 0; }
[dir="rtl"] .eyebrow::before { background: linear-gradient(270deg, transparent, var(--accent)); }
[dir="rtl"] .chip, [dir="rtl"] .btn { letter-spacing: 0; }
[dir="rtl"] .container:not(.center) .section-head:not(.center),
[dir="rtl"] .card:not(.center), [dir="rtl"] .hero-inner, [dir="rtl"] .page-hero .container,
[dir="rtl"] .split > div, [dir="rtl"] .fm-body, [dir="rtl"] .ef-body { text-align: right; }
[dir="rtl"] .btn i[data-ic="arrow"] svg, [dir="rtl"] .link-arrow svg, [dir="rtl"] .md-link i[data-ic="arrow"] svg { transform: scaleX(-1); }
[dir="rtl"] .btn:hover i[data-ic="arrow"] svg { transform: scaleX(-1) translateX(4px); }
[dir="rtl"] .brand .brand-txt b { letter-spacing: 0.08em; }
[dir="rtl"] .breadcrumb { direction: rtl; }