/* ============================================================
   The Information Capital · Variation 1 — Cinematic Dark
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  --ink-0: #04081A;
  --ink-1: #070D24;
  --ink-2: #0A1430;
  --ink-3: #0E1A3D;
  --line: rgba(102, 138, 207, 0.14);
  --line-strong: rgba(122, 158, 222, 0.28);
  --text: #E6ECFB;
  --text-2: #9DAFD0;
  --text-3: #6B7DA0;
  --cyan: #4DC8E0;
  --cyan-bright: #6CDFF5;
  --cyan-deep: #1F8AB0;
  --amber: #E8954A;
  --nav-bg: rgba(4, 8, 26, 0.85);
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.07);
  --hairline: rgba(255, 255, 255, 0.05);
  --overlay: rgba(4, 8, 26, 0.88);
  --hero-overlay: linear-gradient(180deg, rgba(4, 8, 26, 0.45) 0%, rgba(4, 8, 26, 0.72) 75%, var(--ink-0) 100%);
  --bg-grad: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(45, 140, 190, 0.18), transparent 60%),
             radial-gradient(ellipse 60% 40% at 50% 110%, rgba(45, 140, 190, 0.10), transparent 60%),
             linear-gradient(180deg, var(--ink-0) 0%, var(--ink-1) 100%);

  --serif: "Instrument Serif", "Times New Roman", serif;
  --sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, "SF Mono", monospace;
  --ar-serif: "Amiri", "Times New Roman", serif;
  --ar-sans: "IBM Plex Sans Arabic", -apple-system, sans-serif;

  --pad-x: clamp(24px, 4.5vw, 88px);
  --max-w: 1320px;
}

/* ---------- Light theme ---------- */
[data-theme="light"] {
  --ink-0: #FFFFFF;
  --ink-1: #EEF1F8;
  --ink-2: #FFFFFF;
  --ink-3: #EDF1F8;
  --line: rgba(20, 40, 90, 0.12);
  --line-strong: rgba(20, 40, 90, 0.22);
  --text: #0B1228;
  --text-2: #44506E;
  --text-3: #5E6980;
  --cyan: #1796B8;
  --cyan-bright: #0E7C9B;
  --cyan-deep: #0A5E78;
  --nav-bg: rgba(255, 255, 255, 0.86);
  --surface: rgba(11, 18, 40, 0.045);
  --surface-hover: rgba(11, 18, 40, 0.08);
  --hairline: rgba(11, 18, 40, 0.10);
  --overlay: rgba(15, 20, 38, 0.55);
  --hero-overlay: linear-gradient(180deg, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0.82) 75%, var(--ink-0) 100%);
  --bg-grad: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(23, 150, 184, 0.12), transparent 60%),
             radial-gradient(ellipse 60% 40% at 50% 110%, rgba(23, 150, 184, 0.07), transparent 60%),
             linear-gradient(180deg, #FFFFFF 0%, #EEF1F8 100%);
}

/* ---------- Colorful theme (warm light) ---------- */
[data-theme="colorful"] {
  --ink-0: #FBEFE3;
  --ink-1: #F5E4D2;
  --ink-2: #FFFFFF;
  --ink-3: #F3E7D7;
  --line: rgba(120, 78, 38, 0.16);
  --line-strong: rgba(120, 78, 38, 0.30);
  --text: #2A2018;
  --text-2: #5F5142;
  --text-3: #6F6150;
  --cyan: #129BB0;
  --cyan-bright: #0B6E84;
  --cyan-deep: #084F60;
  --amber: #D9601E;
  --nav-bg: rgba(251, 239, 227, 0.86);
  --surface: rgba(74, 48, 22, 0.05);
  --surface-hover: rgba(74, 48, 22, 0.09);
  --hairline: rgba(74, 48, 22, 0.13);
  --overlay: rgba(40, 28, 16, 0.55);
  --hero-overlay: linear-gradient(180deg, rgba(251, 239, 227, 0.50) 0%, rgba(251, 239, 227, 0.82) 75%, var(--ink-0) 100%);
  --bg-grad: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(232, 149, 74, 0.20), transparent 60%),
             radial-gradient(ellipse 60% 40% at 50% 110%, rgba(21, 160, 181, 0.13), transparent 60%),
             linear-gradient(180deg, #FBEFE3 0%, #F5E4D2 100%);
}

/* ---------- Reset / base ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { background: var(--ink-0); color: var(--text); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
body { overflow-x: hidden; font-weight: 400; line-height: 1.55; font-size: 16px; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

/* Multilingual swap — show only the active language */
[data-lang="en"] .lang-ar, [data-lang="en"] .lang-fr, [data-lang="en"] .lang-es, [data-lang="en"] .lang-de, [data-lang="en"] .lang-it { display: none !important; }
[data-lang="ar"] .lang-en, [data-lang="ar"] .lang-fr, [data-lang="ar"] .lang-es, [data-lang="ar"] .lang-de, [data-lang="ar"] .lang-it { display: none !important; }
[data-lang="fr"] .lang-en, [data-lang="fr"] .lang-ar, [data-lang="fr"] .lang-es, [data-lang="fr"] .lang-de, [data-lang="fr"] .lang-it { display: none !important; }
[data-lang="es"] .lang-en, [data-lang="es"] .lang-ar, [data-lang="es"] .lang-fr, [data-lang="es"] .lang-de, [data-lang="es"] .lang-it { display: none !important; }
[data-lang="de"] .lang-en, [data-lang="de"] .lang-ar, [data-lang="de"] .lang-fr, [data-lang="de"] .lang-es, [data-lang="de"] .lang-it { display: none !important; }
[data-lang="it"] .lang-en, [data-lang="it"] .lang-ar, [data-lang="it"] .lang-fr, [data-lang="it"] .lang-es, [data-lang="it"] .lang-de { display: none !important; }
[data-lang="ar"] { direction: rtl; font-family: var(--ar-sans); }
[data-lang="ar"] body { font-family: var(--ar-sans); }
[data-lang="ar"] .display-1,
[data-lang="ar"] .display-2,
[data-lang="ar"] .hero__title,
[data-lang="ar"] .finale__title { font-family: var(--ar-serif); font-weight: 700; }

/* ---------- Type ---------- */
.display-1 { font-family: var(--serif); font-weight: 400; font-size: clamp(48px, 8vw, 128px); line-height: 0.95; letter-spacing: -0.02em; }
.display-2 { font-family: var(--serif); font-weight: 400; font-size: clamp(34px, 4.6vw, 62px); line-height: 1.05; letter-spacing: -0.015em; text-wrap: balance; }
.display-2 em { font-style: italic; color: var(--cyan-bright); }
.eyebrow { display: inline-flex; align-items: center; gap: 14px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-3); margin-bottom: 24px; }
.eyebrow__num { padding: 4px 8px; background: rgba(108, 223, 245, 0.08); color: var(--cyan-bright); border: 1px solid rgba(108, 223, 245, 0.2); border-radius: 3px; }
.eyebrow--center { display: flex; justify-content: center; width: 100%; margin-bottom: 48px; }
[data-lang="ar"] .eyebrow { font-family: var(--mono); direction: ltr; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px;
  font-family: var(--sans); font-size: 13px; font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: 999px;
  transition: all 0.25s cubic-bezier(.2,.7,.3,1);
  white-space: nowrap;
}
[data-lang="ar"] .btn { font-family: var(--ar-sans); }
.btn--primary { background: linear-gradient(180deg, var(--cyan-bright), var(--cyan)); color: var(--ink-0); font-weight: 600; box-shadow: 0 6px 24px -8px rgba(108, 223, 245, 0.5); }
.btn--primary:hover { transform: translateY(-1px); box-shadow: 0 12px 32px -8px rgba(108, 223, 245, 0.7); }
.btn--ghost { background: var(--surface); color: var(--text); border: 1px solid var(--line-strong); }
.btn--ghost:hover { background: var(--surface-hover); border-color: var(--cyan); color: var(--cyan-bright); }
.btn--lg { padding: 16px 30px; font-size: 14px; }
.btn--xl { padding: 22px 42px; font-size: 16px; }

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: grid; grid-template-columns: auto 1fr auto;
  align-items: center; gap: 40px;
  padding: 18px var(--pad-x);
  background: linear-gradient(180deg, var(--nav-bg) 60%, transparent);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
}
.nav__brand { display: flex; align-items: center; gap: 12px; }
.nav__brand img { width: 38px; height: 38px; border-radius: 8px; }
.nav__brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.nav__brand-text > span { font-size: 13px; font-weight: 600; letter-spacing: -0.005em; }
.nav__brand-text em { font-family: var(--mono); font-style: normal; font-size: 9px; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.15em; margin-top: 2px; }
.nav__links { display: flex; gap: 28px; justify-content: center; }
.nav__links a { font-size: 13px; color: var(--text-2); transition: color 0.2s; position: relative; }
.nav__links a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 1px; background: var(--cyan-bright); transform: scaleX(0); transition: transform 0.25s; transform-origin: left; }
.nav__links a:hover { color: var(--text); }
.nav__links a:hover::after { transform: scaleX(1); }
.nav__actions { display: flex; align-items: center; gap: 14px; }
.lang-toggle { display: inline-flex; align-items: center; gap: 5px; padding: 7px 12px; border: 1px solid var(--line-strong); border-radius: 999px; font-size: 12px; font-family: var(--mono); color: var(--text-2); transition: border-color 0.2s; }
.lang-toggle:hover { border-color: var(--cyan); }
.lang-toggle__sep { color: var(--text-3); }
.lang-toggle__opt { font-family: var(--mono); font-size: 12px; color: var(--text-3); padding: 2px 2px; transition: color 0.2s; }
.lang-toggle__opt:hover { color: var(--text); }
[data-lang="en"] .lang-toggle__opt[data-lang-opt="en"],
[data-lang="ar"] .lang-toggle__opt[data-lang-opt="ar"],
[data-lang="fr"] .lang-toggle__opt[data-lang-opt="fr"],
[data-lang="es"] .lang-toggle__opt[data-lang-opt="es"],
[data-lang="de"] .lang-toggle__opt[data-lang-opt="de"],
[data-lang="it"] .lang-toggle__opt[data-lang-opt="it"] { color: var(--cyan-bright); }

/* ---------- Theme toggle ---------- */
.theme-toggle { display: inline-flex; align-items: center; gap: 7px; }
.theme-toggle__opt {
  width: 17px; height: 17px; border-radius: 50%;
  border: 1px solid var(--line-strong);
  transition: transform 0.2s, box-shadow 0.2s;
}
.theme-toggle__opt:hover { transform: scale(1.14); }
.theme-toggle__opt[data-theme-opt="dark"] { background: #07112E; }
.theme-toggle__opt[data-theme-opt="light"] { background: #F4F6FB; }
.theme-toggle__opt[data-theme-opt="colorful"] { background: linear-gradient(135deg, #FBE0C4 0%, #15A0B5 100%); }
.theme-toggle__opt.is-active { box-shadow: 0 0 0 2px var(--ink-0), 0 0 0 3.5px var(--cyan-bright); }
[data-theme="light"] .hero__noise,
[data-theme="colorful"] .hero__noise { opacity: 0.13; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 140px var(--pad-x) 80px;
  background: var(--bg-grad);
  overflow: hidden;
  isolation: isolate;
}
/* YouTube background video — sits behind every other hero layer.
   width/height use the larger of viewport-width or 16:9-derived from viewport-height
   so the iframe fully covers the hero while keeping aspect ratio (no letterboxing). */
.hero__video {
  position: absolute; inset: 0; z-index: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero__video iframe {
  position: absolute;
  top: 50%; left: 50%;
  width: max(100vw, 177.78vh);
  height: max(56.25vw, 100vh);
  transform: translate(-50%, -50%);
  border: 0;
  pointer-events: none;
}
/* Theme-aware overlay above the video for headline contrast and bottom fade-out. */
.hero__video::after {
  content: "";
  position: absolute; inset: 0;
  background: var(--hero-overlay);
  pointer-events: none;
}
.hero__grid {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(to right, rgba(108, 223, 245, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(108, 223, 245, 0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 90% 80% at 50% 50%, black 0%, transparent 75%);
}
.hero__rays {
  position: absolute; top: -10%; left: 50%; transform: translateX(-50%);
  width: 1600px; height: 1000px; pointer-events: none; z-index: 0;
  background:
    conic-gradient(from 90deg at 50% 0%,
      transparent 0deg,
      rgba(108, 223, 245, 0) 30deg,
      rgba(108, 223, 245, 0.05) 80deg,
      rgba(108, 223, 245, 0.12) 100deg,
      rgba(108, 223, 245, 0.05) 120deg,
      rgba(108, 223, 245, 0) 170deg,
      transparent 360deg);
  mask-image: radial-gradient(ellipse 70% 70% at 50% 30%, black 0%, transparent 70%);
  opacity: 0.7;
  animation: rayShift 18s ease-in-out infinite;
}
@keyframes rayShift { 0%,100% { transform: translateX(-50%) rotate(-2deg); } 50% { transform: translateX(-50%) rotate(2deg); } }
.hero__noise {
  position: absolute; inset: 0; pointer-events: none; z-index: 1;
  opacity: 0.4;
  background-image: url("data:image/svg+xml;utf8,<svg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.35'/></svg>");
  mix-blend-mode: overlay;
}

.hero__inner {
  position: relative; z-index: 2;
  max-width: var(--max-w); margin: 0 auto;
  display: flex; flex-direction: column; align-items: center;
  text-align: center;
}
.hero__meta { display: inline-flex; align-items: center; gap: 12px; padding: 8px 18px; border: 1px solid var(--line-strong); border-radius: 999px; background: rgba(108, 223, 245, 0.04); margin-bottom: 36px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; color: var(--text-2); text-transform: uppercase; }
[data-lang="ar"] .hero__meta { font-family: var(--ar-sans); font-size: 13px; text-transform: none; letter-spacing: 0; }
.hero__meta-dot { width: 6px; height: 6px; background: var(--cyan-bright); border-radius: 50%; box-shadow: 0 0 12px var(--cyan-bright); animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.4; } }

.hero__title { font-family: var(--serif); font-weight: 400; font-size: clamp(64px, 11vw, 180px); line-height: 0.92; letter-spacing: -0.025em; margin-bottom: 36px; }
[data-lang="ar"] .hero__title { font-family: var(--ar-serif); }
.hero__line { display: block; opacity: 0; transform: translateY(30px); animation: heroLine 1.2s cubic-bezier(.2,.7,.3,1) forwards; }
.hero__line:nth-child(2) { animation-delay: 0.15s; }
.hero__line:nth-child(3) { animation-delay: 0.3s; }
@keyframes heroLine { to { opacity: 1; transform: translateY(0); } }
.hero__line--italic { font-style: italic; color: var(--text-2); }
.hero__line--bright {
  background: linear-gradient(180deg, var(--cyan-bright), var(--cyan));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  position: relative;
}
.hero__line--bright::after {
  content: ""; position: absolute; left: 50%; bottom: -8px; transform: translateX(-50%);
  width: 60%; height: 4px;
  background: radial-gradient(ellipse 50% 100% at 50% 0%, var(--cyan-bright), transparent 70%);
  opacity: 0.6; filter: blur(8px);
}
.hero__sub { font-size: clamp(17px, 1.4vw, 21px); color: var(--text-2); max-width: 680px; margin: 0 auto 44px; line-height: 1.55; text-wrap: pretty; opacity: 0; transform: translateY(20px); animation: heroLine 1.2s cubic-bezier(.2,.7,.3,1) 0.5s forwards; }
.hero__sub strong { color: var(--text); font-weight: 500; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; opacity: 0; transform: translateY(20px); animation: heroLine 1.2s cubic-bezier(.2,.7,.3,1) 0.65s forwards; margin-bottom: 90px; }

.hero__stack-strip { position: relative; width: 100%; margin-top: 20px; padding: 40px 0 0; overflow: hidden; mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent); }
.hero__stack-strip-track { display: flex; gap: 24px; align-items: flex-end; justify-content: center; }
.hero__stack-strip-track > div { flex: 0 0 auto; opacity: 0; transform: translateY(40px) rotate(var(--r, 0deg)); animation: heroLine 1s cubic-bezier(.2,.7,.3,1) forwards; animation-delay: var(--d, 1s); }
.hero__stack-strip-track img { width: 110px; height: auto; border-radius: 4px; box-shadow: 0 16px 40px -10px rgba(0,0,0,0.6), 0 0 0 1px var(--hairline); transition: transform 0.4s; }
.hero__stack-strip-track > div:hover img { transform: translateY(-12px) scale(1.05); }

.hero__cue { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 10px; font-family: var(--mono); font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--text-3); z-index: 2; }
.hero__cue-line { width: 1px; height: 40px; background: linear-gradient(180deg, var(--text-3), transparent); position: relative; }
.hero__cue-line::before { content: ""; position: absolute; top: 0; left: -1px; width: 3px; height: 8px; background: var(--cyan-bright); animation: cueSlide 2.5s ease-in-out infinite; box-shadow: 0 0 8px var(--cyan-bright); }
@keyframes cueSlide { 0% { top: 0; opacity: 0; } 30% { opacity: 1; } 100% { top: 40px; opacity: 0; } }

/* ---------- Thesis ---------- */
.thesis {
  max-width: var(--max-w); margin: 0 auto;
  padding: 140px var(--pad-x) 80px;
  display: grid; grid-template-columns: 5fr 6fr; gap: 80px;
}
.thesis__col--body p { font-size: 19px; line-height: 1.65; color: var(--text-2); text-wrap: pretty; }
.thesis__col--body p em { color: var(--text); font-style: italic; }
.thesis__stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 48px; padding-top: 40px; border-top: 1px solid var(--line); }
.thesis__stats > div { display: flex; flex-direction: column; gap: 6px; }
.thesis__stats b { font-family: var(--serif); font-weight: 400; font-size: 56px; line-height: 1; color: var(--cyan-bright); letter-spacing: -0.02em; }
.thesis__stats span { font-family: var(--mono); font-size: 10px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-3); }
[data-lang="ar"] .thesis__stats span { font-family: var(--ar-sans); text-transform: none; letter-spacing: 0; font-size: 13px; }

/* ---------- Marquee ---------- */
.marquee { overflow: hidden; padding: 28px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(108, 223, 245, 0.015); }
.marquee__track { display: flex; gap: 60px; white-space: nowrap; animation: marquee 45s linear infinite; font-family: var(--serif); font-style: italic; font-size: 28px; color: var(--text-3); }
.marquee__track span { display: inline-flex; align-items: center; gap: 60px; }
.marquee__track span::after { content: "✦"; color: var(--cyan-deep); font-style: normal; }
@keyframes marquee { to { transform: translateX(-50%); } }
[data-lang="ar"] .marquee__track { font-family: var(--ar-serif); animation-direction: reverse; }

/* ---------- Cinematic Showcase ---------- */
.showcase {
  position: relative;
  /* height drives scroll length; 8 panels × 1 viewport each */
  height: 800vh;
  background: var(--ink-1);
}
.showcase__sticky {
  position: sticky; top: 0;
  height: 100vh; overflow: hidden;
  display: flex; flex-direction: column;
  padding: 100px var(--pad-x) 60px;
}
.showcase__header { display: flex; align-items: center; justify-content: space-between; }
.showcase__progress { display: flex; align-items: baseline; gap: 6px; font-family: var(--mono); font-size: 14px; }
.showcase__progress-num { font-size: 38px; color: var(--cyan-bright); font-family: var(--serif); }
.showcase__progress-sep, .showcase__progress-tot { color: var(--text-3); }

.showcase__track {
  flex: 1;
  display: flex; align-items: center;
  gap: 0;
  position: relative;
  transition: transform 0.6s cubic-bezier(.2,.7,.3,1);
  will-change: transform;
}
[data-lang="ar"] .showcase__track { direction: ltr; }

.sc-panel { flex: 0 0 100%; min-width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; padding: 20px 40px; }
.sc-panel__cover { position: relative; display: flex; justify-content: center; }
.sc-panel__cover-img { width: min(420px, 100%); aspect-ratio: 2/3; object-fit: cover; border-radius: 6px; box-shadow: 0 40px 100px -20px rgba(0,0,0,0.8), 0 0 0 1px var(--hairline); transform: rotate(-2deg); transition: transform 0.6s; }
.sc-panel.is-active .sc-panel__cover-img { transform: rotate(0deg); }
.sc-panel__cover-glow { position: absolute; inset: -40px; border-radius: 50%; opacity: 0.5; filter: blur(60px); z-index: -1; }
.sc-panel__body { padding-right: 20px; }
[data-lang="ar"] .sc-panel__body { padding-right: 0; padding-left: 20px; direction: rtl; }
.sc-panel__num { font-family: var(--mono); font-size: 12px; color: var(--text-3); letter-spacing: 0.15em; margin-bottom: 14px; display: flex; align-items: center; gap: 12px; }
.sc-panel__num::before { content: ""; width: 24px; height: 1px; background: var(--text-3); }
.sc-panel__sectors { font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--cyan); margin-bottom: 16px; }
[data-lang="ar"] .sc-panel__sectors { font-family: var(--ar-sans); text-transform: none; letter-spacing: 0; font-size: 14px; }
.sc-panel__title { font-family: var(--serif); font-size: clamp(40px, 5vw, 72px); font-weight: 400; line-height: 1; letter-spacing: -0.02em; margin-bottom: 22px; opacity: 0; transform: translateY(20px); transition: all 0.6s 0.1s; }
[data-lang="ar"] .sc-panel__title { font-family: var(--ar-serif); }
.sc-panel.is-active .sc-panel__title { opacity: 1; transform: translateY(0); }
.sc-panel__summary { font-size: 17px; color: var(--text-2); line-height: 1.6; max-width: 480px; margin-bottom: 28px; text-wrap: pretty; opacity: 0; transform: translateY(20px); transition: all 0.6s 0.2s; }
.sc-panel.is-active .sc-panel__summary { opacity: 1; transform: translateY(0); }
.sc-panel__pillars { display: flex; flex-wrap: wrap; gap: 8px; opacity: 0; transform: translateY(20px); transition: all 0.6s 0.3s; }
.sc-panel.is-active .sc-panel__pillars { opacity: 1; transform: translateY(0); }
.sc-panel__pillars span { padding: 6px 12px; border: 1px solid var(--line-strong); border-radius: 4px; font-size: 12px; color: var(--text-2); background: var(--surface); }

.showcase__dots { display: flex; gap: 8px; justify-content: center; padding: 20px 0 0; }
.showcase__dots button { width: 28px; height: 3px; background: var(--line-strong); border-radius: 2px; transition: all 0.3s; }
.showcase__dots button.is-active { background: var(--cyan-bright); width: 48px; }
.showcase__dots button:hover { background: var(--text-3); }
.showcase__dots button.is-active:hover { background: var(--cyan-bright); }

/* ---------- Grid Section ---------- */
.grid-section { max-width: var(--max-w); margin: 0 auto; padding: 160px var(--pad-x) 100px; }
.grid-section__head { max-width: 720px; margin-bottom: 64px; }
.grid-section__note { color: var(--text-3); margin-top: 18px; font-size: 14px; }
.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.book-card { position: relative; cursor: pointer; transition: transform 0.4s; }
.book-card__cover-wrap { position: relative; aspect-ratio: 2/3; overflow: hidden; border-radius: 6px; box-shadow: 0 20px 40px -10px rgba(0,0,0,0.6), 0 0 0 1px var(--hairline); transition: all 0.4s; }
.book-card__cover-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s; }
.book-card:hover { transform: translateY(-8px); }
.book-card:hover .book-card__cover-wrap { box-shadow: 0 30px 60px -10px rgba(0,0,0,0.7), 0 0 0 1px var(--cyan-bright), 0 0 40px var(--book-glow, rgba(77, 200, 224, 0.4)); }
.book-card:hover .book-card__cover-wrap img { transform: scale(1.05); }
.book-card__num { position: absolute; top: -12px; right: -12px; width: 40px; height: 40px; background: var(--ink-2); border: 1px solid var(--line-strong); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: var(--mono); font-size: 13px; color: var(--book-color, var(--cyan-bright)); z-index: 2; transition: all 0.3s; }
.book-card:hover .book-card__num { background: var(--book-color, var(--cyan-bright)); color: var(--ink-0); border-color: var(--book-color, var(--cyan-bright)); }
.book-card__meta { margin-top: 18px; }
.book-card__title { font-family: var(--serif); font-size: 22px; line-height: 1.15; font-weight: 400; letter-spacing: -0.01em; margin-bottom: 6px; }
[data-lang="ar"] .book-card__title { font-family: var(--ar-serif); }
.book-card__sectors { font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); line-height: 1.4; }
[data-lang="ar"] .book-card__sectors { font-family: var(--ar-sans); text-transform: none; letter-spacing: 0; font-size: 12px; }

/* ---------- Author ---------- */
.author {
  max-width: var(--max-w); margin: 0 auto;
  padding: 100px var(--pad-x);
  display: grid; grid-template-columns: 5fr 7fr; gap: 80px; align-items: center;
}
.author__media { position: relative; }
.author__media img { width: 100%; aspect-ratio: 4/5; object-fit: cover; border-radius: 4px; filter: contrast(1.1) brightness(0.95); }
.author__media-frame { position: absolute; inset: -16px; border: 1px solid var(--line-strong); border-radius: 4px; z-index: -1; transform: translate(20px, 20px); }
.author__signature { position: absolute; bottom: -30px; left: 20px; font-family: var(--serif); font-style: italic; font-size: 32px; color: var(--cyan-bright); }
[data-lang="ar"] .author__signature { font-family: var(--ar-serif); left: auto; right: 20px; }
.author__bio { font-size: 17px; color: var(--text-2); line-height: 1.7; margin: 28px 0 36px; text-wrap: pretty; }
.author__facts { list-style: none; display: flex; flex-direction: column; gap: 16px; padding-top: 28px; border-top: 1px solid var(--line); }
.author__facts li { display: grid; grid-template-columns: 180px 1fr; gap: 24px; align-items: baseline; }
.author__facts b { font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-3); font-weight: 400; }
[data-lang="ar"] .author__facts b { font-family: var(--ar-sans); text-transform: none; letter-spacing: 0; font-size: 13px; }
.author__facts span { font-size: 15px; color: var(--text); }

/* ---------- Reviews ---------- */
.reviews { max-width: var(--max-w); margin: 0 auto; padding: 120px var(--pad-x); }
.reviews__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.review { padding: 36px 30px; border: 1px solid var(--line); border-radius: 4px; background: linear-gradient(180deg, rgba(108, 223, 245, 0.02), transparent); position: relative; transition: all 0.3s; }
.review:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.review__quote-mark { font-family: var(--serif); font-size: 80px; line-height: 0.8; color: var(--cyan-deep); position: absolute; top: 18px; right: 24px; opacity: 0.4; }
[data-lang="ar"] .review__quote-mark { right: auto; left: 24px; }
.review__quote { font-family: var(--serif); font-style: italic; font-size: 22px; line-height: 1.4; color: var(--text); margin-bottom: 28px; position: relative; z-index: 1; text-wrap: pretty; }
[data-lang="ar"] .review__quote { font-family: var(--ar-serif); }
.review__author { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--cyan); }
[data-lang="ar"] .review__author { font-family: var(--ar-sans); text-transform: none; letter-spacing: 0; font-size: 13px; }
.review__org { font-size: 13px; color: var(--text-3); margin-top: 4px; }

/* ---------- Finale CTA ---------- */
.finale { position: relative; padding: 160px var(--pad-x); overflow: hidden; isolation: isolate; text-align: center; background: radial-gradient(ellipse 70% 80% at 50% 50%, rgba(108, 223, 245, 0.15), transparent 60%), var(--ink-0); border-top: 1px solid var(--line); }
.finale__bg-rays { position: absolute; inset: 0; z-index: -1; background-image: linear-gradient(transparent 60%, rgba(108, 223, 245, 0.08)); background-size: 100% 4px; mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black, transparent 70%); }
.finale__inner { max-width: 800px; margin: 0 auto; }
.finale__pre { font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--cyan-bright); margin-bottom: 24px; }
[data-lang="ar"] .finale__pre { font-family: var(--ar-sans); text-transform: none; letter-spacing: 0; font-size: 14px; }
.finale__title { font-family: var(--serif); font-weight: 400; font-size: clamp(56px, 9vw, 130px); line-height: 0.92; letter-spacing: -0.025em; margin-bottom: 24px; }
[data-lang="ar"] .finale__title { font-family: var(--ar-serif); }
.finale__title em { font-style: italic; color: var(--cyan-bright); }
.finale__sub { font-size: 17px; color: var(--text-2); margin-bottom: 48px; }
.finale__formats { margin-top: 36px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-3); display: flex; gap: 14px; justify-content: center; }
[data-lang="ar"] .finale__formats { font-family: var(--ar-sans); text-transform: none; letter-spacing: 0; font-size: 14px; }
.finale__dot { color: var(--cyan-deep); }

/* ---------- Footer ---------- */
.foot { max-width: var(--max-w); margin: 0 auto; padding: 60px var(--pad-x); display: grid; grid-template-columns: 2fr 2fr 1fr; gap: 60px; border-top: 1px solid var(--line); align-items: start; }
.foot__col p { font-size: 13px; color: var(--text-3); margin-top: 14px; line-height: 1.6; max-width: 320px; }
.foot__logo { width: 56px; height: 56px; border-radius: 10px; }
.foot__ams { width: 200px; height: auto; margin-left: -20px; opacity: 0.85; }
[data-lang="ar"] .foot__ams { margin-left: 0; margin-right: -20px; }
/* Theme-specific imprint logo: white wordmark on dark, blue on the light themes */
.foot__ams--light { display: none; }
[data-theme="light"] .foot__ams--dark,
[data-theme="colorful"] .foot__ams--dark { display: none; }
[data-theme="light"] .foot__ams--light,
[data-theme="colorful"] .foot__ams--light { display: block; }
.foot__col--meta { text-align: right; display: flex; flex-direction: column; gap: 6px; }
[data-lang="ar"] .foot__col--meta { text-align: left; }
.foot__col--meta small { font-family: var(--mono); font-size: 11px; color: var(--text-3); }

/* ---------- Modal ---------- */
.modal { position: fixed; inset: 0; z-index: 100; display: none; align-items: center; justify-content: center; padding: 40px; }
.modal[aria-hidden="false"] { display: flex; }
.modal__backdrop { position: absolute; inset: 0; background: var(--overlay); backdrop-filter: blur(12px); animation: fadeIn 0.3s; }
@keyframes fadeIn { from { opacity: 0; } }
.modal__panel { position: relative; max-width: 1000px; width: 100%; max-height: 90vh; background: var(--ink-2); border: 1px solid var(--line-strong); border-radius: 8px; display: grid; grid-template-columns: 380px 1fr; overflow: hidden; box-shadow: 0 40px 80px rgba(0,0,0,0.6); animation: panelIn 0.4s cubic-bezier(.2,.7,.3,1); }
@keyframes panelIn { from { opacity: 0; transform: scale(0.95) translateY(20px); } }
.modal__close { position: absolute; top: 16px; right: 16px; width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: var(--surface); color: var(--text-2); z-index: 2; transition: all 0.2s; }
.modal__close:hover { background: var(--cyan); color: var(--ink-0); }
[data-lang="ar"] .modal__close { right: auto; left: 16px; }
.modal__cover { position: relative; padding: 40px; background: var(--ink-3); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.modal__cover img { width: 100%; height: auto; max-height: 100%; object-fit: contain; border-radius: 4px; box-shadow: 0 30px 60px rgba(0,0,0,0.6); position: relative; z-index: 1; }
.modal__cover-glow { position: absolute; inset: 0; filter: blur(60px); opacity: 0.7; transition: background 0.4s; }
.modal__body { padding: 50px 40px; overflow-y: auto; display: flex; flex-direction: column; }
.modal__num { font-family: var(--serif); font-size: 60px; color: var(--book-color, var(--cyan-bright)); line-height: 1; margin-bottom: 24px; }
.modal__sectors { font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); margin-bottom: 16px; }
[data-lang="ar"] .modal__sectors { font-family: var(--ar-sans); text-transform: none; letter-spacing: 0; font-size: 13px; }
.modal__title { font-family: var(--serif); font-size: 40px; font-weight: 400; line-height: 1.05; letter-spacing: -0.02em; margin-bottom: 14px; }
[data-lang="ar"] .modal__title { font-family: var(--ar-serif); }
.modal__sub { color: var(--text-2); font-size: 15px; margin-bottom: 24px; line-height: 1.5; }
.modal__summary { color: var(--text); font-size: 16px; line-height: 1.65; margin-bottom: 28px; text-wrap: pretty; }
.modal__pillars { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.modal__pillars span { padding: 6px 12px; border: 1px solid var(--line-strong); border-radius: 4px; font-size: 12px; color: var(--text-2); background: var(--surface); }
.modal__actions { display: flex; gap: 12px; margin-top: auto; }

/* ---------- Video Library ---------- */
.videos { max-width: var(--max-w); margin: 0 auto; padding: 60px var(--pad-x) 110px; }
.videos__head { max-width: 720px; margin-bottom: 60px; }
.videos__note { color: var(--text-3); margin-top: 18px; font-size: 14px; }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px 28px; }
.video-card { cursor: pointer; display: flex; flex-direction: column; gap: 14px; transition: transform 0.4s; }
.video-card:hover { transform: translateY(-6px); }
.video-card__thumb {
  position: relative; aspect-ratio: 16 / 9; border-radius: 6px; overflow: hidden;
  background: var(--ink-3);
  box-shadow: 0 20px 40px -12px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.04);
  transition: box-shadow 0.4s;
}
.video-card__thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s; }
.video-card:hover .video-card__thumb { box-shadow: 0 30px 56px -12px rgba(0,0,0,0.72), 0 0 0 1px var(--cyan-bright), 0 0 38px rgba(77,200,224,0.34); }
.video-card:hover .video-card__thumb img { transform: scale(1.06); }
.video-card__play {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(180deg, rgba(4,8,26,0.05), rgba(4,8,26,0.55));
  transition: background 0.3s;
}
.video-card:hover .video-card__play { background: linear-gradient(180deg, rgba(4,8,26,0.05), rgba(4,8,26,0.35)); }
.video-card__play-icon {
  width: 58px; height: 58px; border-radius: 50%;
  background: linear-gradient(180deg, var(--cyan-bright), var(--cyan));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 30px -6px rgba(108,223,245,0.6);
  transform: scale(0.9); transition: transform 0.3s;
}
.video-card:hover .video-card__play-icon { transform: scale(1.05); }
.video-card__play-icon::after {
  content: ""; width: 0; height: 0;
  border-style: solid; border-width: 9px 0 9px 15px;
  border-color: transparent transparent transparent var(--ink-0);
  margin-left: 4px;
}
.video-card__dur {
  position: absolute; bottom: 10px; right: 10px;
  padding: 3px 8px; border-radius: 4px;
  background: rgba(4,8,26,0.85); border: 1px solid var(--line-strong);
  font-family: var(--mono); font-size: 11px; color: var(--text);
}
[data-lang="ar"] .video-card__dur { right: auto; left: 10px; direction: ltr; }
.video-card__num { font-family: var(--mono); font-size: 10px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-3); margin-bottom: 6px; }
[data-lang="ar"] .video-card__num { font-family: var(--ar-sans); text-transform: none; letter-spacing: 0; font-size: 12px; }
.video-card__title { font-family: var(--serif); font-size: 20px; line-height: 1.2; font-weight: 400; letter-spacing: -0.01em; }
[data-lang="ar"] .video-card__title { font-family: var(--ar-serif); }
.videos__playlist {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 48px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em; color: var(--cyan-bright);
  border-bottom: 1px solid rgba(108,223,245,0.3); padding-bottom: 4px;
  transition: color 0.2s, border-color 0.2s;
}
[data-lang="ar"] .videos__playlist { font-family: var(--ar-sans); }
.videos__playlist:hover { color: var(--text); border-color: var(--cyan-bright); }

/* ---------- Video Modal ---------- */
.vmodal { position: fixed; inset: 0; z-index: 110; display: none; align-items: center; justify-content: center; padding: 40px; }
.vmodal[aria-hidden="false"] { display: flex; }
.vmodal__backdrop { position: absolute; inset: 0; background: var(--overlay); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); animation: fadeIn 0.3s; }
.vmodal__panel {
  position: relative; width: min(1040px, 100%); max-height: 92vh; overflow-y: auto;
  background: var(--ink-2); border: 1px solid var(--line-strong); border-radius: 8px;
  box-shadow: 0 40px 80px rgba(0,0,0,0.6);
  animation: panelIn 0.4s cubic-bezier(.2,.7,.3,1);
}
.vmodal__close {
  position: absolute; top: 14px; right: 14px; z-index: 3;
  width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
  border-radius: 50%; background: rgba(4,8,26,0.6); color: var(--text-2);
  backdrop-filter: blur(6px); transition: all 0.2s;
}
.vmodal__close:hover { background: var(--cyan); color: var(--ink-0); }
[data-lang="ar"] .vmodal__close { right: auto; left: 14px; }
.vmodal__frame { position: relative; aspect-ratio: 16 / 9; background: #000; }
.vmodal__embed { position: absolute; inset: 0; }
.vmodal__embed iframe { width: 100%; height: 100%; border: 0; display: block; }
.vmodal__bar { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 24px 30px; flex-wrap: wrap; }
.vmodal__num { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; color: var(--cyan); }
[data-lang="ar"] .vmodal__num { font-family: var(--ar-sans); letter-spacing: 0; font-size: 13px; }
.vmodal__title { font-family: var(--serif); font-size: 25px; font-weight: 400; line-height: 1.2; letter-spacing: -0.015em; margin-top: 6px; max-width: 560px; }
[data-lang="ar"] .vmodal__title { font-family: var(--ar-serif); }
.vmodal__actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .nav__links { display: none; }
  .nav { grid-template-columns: 1fr auto; }
  .thesis, .author { grid-template-columns: 1fr; gap: 40px; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .reviews__grid { grid-template-columns: 1fr; }
  .foot { grid-template-columns: 1fr; gap: 32px; }
  .foot__col--meta { text-align: left; }
  .sc-panel { grid-template-columns: 1fr; gap: 30px; text-align: center; }
  .sc-panel__cover { max-width: 300px; margin: 0 auto; }
  .sc-panel__pillars { justify-content: center; }
  .modal__panel { grid-template-columns: 1fr; max-height: 95vh; overflow-y: auto; }
  .modal__cover { padding: 30px; max-height: 400px; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .vmodal { padding: 20px; }
  .vmodal__bar { padding: 20px; }
}
@media (max-width: 600px) {
  .grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .thesis__stats { grid-template-columns: repeat(2, 1fr); }
  .hero { padding-top: 168px; }
  .video-grid { grid-template-columns: 1fr; }
  /* Mobile: drop the Amazon button onto its own row beneath the toggles */
  .nav__actions { flex-wrap: wrap; justify-content: flex-end; row-gap: 11px; }
  .nav__actions .btn--primary { flex-basis: 100%; justify-content: center; }
  .vmodal { padding: 0; align-items: stretch; }
  .vmodal__panel { max-height: 100vh; border-radius: 0; border: 0; width: 100%; }
  .vmodal__actions { width: 100%; }
  .vmodal__actions .btn { flex: 1; justify-content: center; }
}