/* ===================================================================
   Browser-based Locally Hosted Arabic LLM Optimization
   Design system: "Illuminated Research" — gold-on-ink, geometric Arabic
   motifs, editorial serif display + grotesque body + mono technical accents
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300..900;1,9..144,300..900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Hanken+Grotesk:ital,wght@0,300..800;1,300..800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,100..800;1,100..800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=PT+Serif:ital,wght@0,400;0,700;1,400;1,700&display=swap');
/* Arabic faces: Amiri (illuminated display) + Tajawal (clean body/UI) */
@import url('https://fonts.googleapis.com/css2?family=Amiri:ital,wght@0,400;0,700;1,400;1,700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Tajawal:wght@400;500;700;800&display=swap');

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

:root {
  --font-display: "Fraunces", "PT Serif", serif;
  --font-body: "Hanken Grotesk", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --font-serif: "PT Serif", serif;

  --maxw: 920px;
  --nav-h: 68px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  font-family: var(--font-body);
}

/* ---------------- Light theme: parchment + gold ---------------- */
:root[data-theme="light"] {
  --header-color: rgb(255, 240, 214);
  --bg-color: rgb(253, 246, 233);
  --bg-color-2: rgb(255, 250, 240);
  --nav-color: rgba(255, 246, 230, 0.78);
  --card-color: rgb(255, 252, 245);
  --card-color-2: rgb(255, 247, 233);

  --text-color: rgb(38, 27, 10);
  --muted-color: rgb(122, 99, 60);
  --icon-color: rgb(224, 156, 24);

  --gold: rgb(221, 160, 38);
  --gold-bright: rgb(245, 188, 70);
  --gold-deep: rgb(150, 101, 16);

  --link-color: rgb(140, 95, 12);
  --underline-color: rgb(190, 140, 50);
  --link-hover-color: rgb(80, 52, 2);

  --btn-text-color: rgb(60, 38, 4);
  --btn-hover-color: rgb(255, 215, 140);

  --border: rgba(160, 116, 36, 0.20);
  --border-strong: rgba(150, 101, 16, 0.40);
  --shadow: 0 24px 60px -28px rgba(120, 80, 10, 0.40);
  --shadow-sm: 0 6px 22px -14px rgba(120, 80, 10, 0.45);
  --code-bg: rgb(28, 24, 17);
  --code-chrome: rgb(40, 35, 24);
  --pattern-color: rgba(176, 128, 40, 0.10);
  --glow: rgba(245, 188, 70, 0.55);
}

/* ---------------- Dark theme: ink + warm gold ---------------- */
:root[data-theme="dark"] {
  --header-color: rgb(20, 19, 17);
  --bg-color: rgb(16, 15, 14);
  --bg-color-2: rgb(24, 22, 19);
  --nav-color: rgba(22, 20, 17, 0.72);
  --card-color: rgb(28, 26, 22);
  --card-color-2: rgb(33, 30, 25);

  --text-color: rgb(245, 239, 227);
  --muted-color: rgb(170, 158, 138);
  --icon-color: rgb(255, 200, 89);

  --gold: rgb(255, 200, 89);
  --gold-bright: rgb(255, 215, 130);
  --gold-deep: rgb(214, 160, 60);

  --link-color: rgb(255, 205, 110);
  --underline-color: rgb(255, 224, 160);
  --link-hover-color: rgb(255, 188, 60);

  --btn-text-color: rgb(255, 233, 196);
  --btn-hover-color: rgb(48, 43, 33);

  --border: rgba(255, 200, 120, 0.14);
  --border-strong: rgba(255, 200, 120, 0.34);
  --shadow: 0 30px 70px -30px rgba(0, 0, 0, 0.85);
  --shadow-sm: 0 10px 30px -16px rgba(0, 0, 0, 0.8);
  --code-bg: rgb(10, 9, 8);
  --code-chrome: rgb(26, 23, 19);
  --pattern-color: rgba(255, 200, 120, 0.06);
  --glow: rgba(255, 200, 89, 0.40);
}

/* ---------------- Arabic typography (applied when lang = ar) ------- */
:root[data-lang="ar"] {
  --font-display: "Amiri", "PT Serif", serif;
  --font-body: "Tajawal", system-ui, sans-serif;
  --font-serif: "Tajawal", serif;
}

/* ---------------- Bilingual show / hide ---------------- */
.lang-en,
.lang-ar { }
html[data-lang="en"] .lang-ar { display: none !important; }
html[data-lang="ar"] .lang-en { display: none !important; }

/* keep code, technical tokens & figures left-to-right even in Arabic */
pre,
pre code,
code {
  direction: ltr;
  text-align: left;
  unicode-bidi: isolate;
}

/* RTL refinements */
html[data-lang="ar"] h2 { text-align: right; }
html[data-lang="ar"] h1.hero-title,
html[data-lang="ar"] h2,
html[data-lang="ar"] h3,
html[data-lang="ar"] .footer-title { line-height: 1.45; }
html[data-lang="ar"] h1.hero-title .accent { font-style: normal; }
html[data-lang="ar"] .long { font-size: 1.16rem; line-height: 2; }

/* Arabic shouldn't use Latin letter-spacing / uppercasing / mono face */
html[data-lang="ar"] .section-num,
html[data-lang="ar"] .hero-kicker,
html[data-lang="ar"] .hero-affil,
html[data-lang="ar"] .stat .label,
html[data-lang="ar"] .socials-container > p,
html[data-lang="ar"] .scroll-hint,
html[data-lang="ar"] .footer-foot,
html[data-lang="ar"] .nav-brand-text span {
  letter-spacing: 0 !important;
  text-transform: none !important;
  font-family: "Tajawal", sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  position: relative;
}

/* Geometric Arabic-inspired backdrop + warm gradient mesh */
.container::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(ellipse 60% 50% at 80% -5%, var(--glow), transparent 60%),
    radial-gradient(ellipse 50% 45% at 10% 8%, var(--pattern-color), transparent 55%);
  opacity: 0.9;
}

.container::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    repeating-linear-gradient(45deg, var(--pattern-color) 0 1px, transparent 1px 22px),
    repeating-linear-gradient(-45deg, var(--pattern-color) 0 1px, transparent 1px 22px);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent 75%);
          mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent 75%);
}

main,
header,
nav,
footer {
  position: relative;
  z-index: 1;
}

/* =================== ANIMATED STICKY NAV =================== */
nav.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem clamp(1rem, 4vw, 2.5rem);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.4s var(--ease), backdrop-filter 0.4s var(--ease),
    border-color 0.4s var(--ease), padding 0.35s var(--ease), box-shadow 0.4s var(--ease);
}

nav.topnav.scrolled {
  background: var(--nav-color);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
          backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
  padding-top: 0.4rem;
  padding-bottom: 0.4rem;
  box-shadow: var(--shadow-sm);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text-color);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
  pointer-events: none;
}

nav.topnav.scrolled .nav-brand {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.nav-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: 0 4px 14px -4px var(--glow);
}

.nav-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 3px;
}

.nav-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-brand-text strong {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.nav-brand-text span {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-color);
}

nav.topnav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: clamp(0.4rem, 1.6vw, 1.4rem);
  flex-wrap: wrap;
  justify-content: center;
  margin: 0 auto;
}

nav.topnav li {
  margin: 0;
}

nav.topnav a.nav-link {
  position: relative;
  text-decoration: none;
  color: var(--muted-color);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 0.35rem 0.2rem;
  transition: color 0.25s var(--ease);
  white-space: nowrap;
}

nav.topnav a.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--gold-bright), var(--gold));
  transition: right 0.3s var(--ease);
}

nav.topnav a.nav-link:hover {
  color: var(--text-color);
}

nav.topnav a.nav-link:hover::after,
nav.topnav a.nav-link.active::after {
  right: 0;
}

nav.topnav a.nav-link.active {
  color: var(--text-color);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

/* language toggle */
button.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  height: 40px;
  padding: 0 0.85rem;
  background: var(--card-color);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--gold-deep);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), color 0.2s var(--ease);
}

button.lang-btn .bi { font-size: 0.95rem; }

button.lang-btn:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  color: var(--link-hover-color);
}

html[data-lang="ar"] button.lang-btn .lang-btn-text { font-family: var(--font-body); }

/* theme toggle */
button.theme-btn {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--card-color);
  border: 1px solid var(--border);
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.05rem;
  color: var(--gold);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), color 0.25s var(--ease);
}

button.theme-btn:hover {
  transform: rotate(-18deg) scale(1.07);
  border-color: var(--border-strong);
  color: var(--link-hover-color);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.82rem;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  color: rgb(34, 22, 4);
  background: linear-gradient(135deg, var(--gold-bright), var(--gold));
  border: none;
  box-shadow: 0 8px 22px -10px var(--glow);
  transition: transform 0.25s var(--ease), box-shadow 0.3s var(--ease);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -10px var(--glow);
  color: rgb(34, 22, 4);
}

/* =================== HERO =================== */
header.hero {
  width: 100%;
  text-align: center;
  padding: clamp(2.5rem, 7vw, 5.5rem) 1.5rem clamp(3rem, 7vw, 5rem);
  position: relative;
  margin-top: calc(-1 * var(--nav-h));
}

.hero-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-top: var(--nav-h);
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-deep);
  padding: 0.4rem 0.95rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--card-color);
  margin-bottom: 1.6rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.05s forwards;
}

.hero-kicker .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px var(--glow);
  animation: pulse 2.4s ease-in-out infinite;
}

h1.hero-title {
  font-family: var(--font-display);
  font-optical-sizing: auto;
  font-weight: 600;
  font-size: clamp(2.2rem, 6vw, 4.1rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 auto 1.4rem;
  max-width: 16ch;
  opacity: 0;
  animation: rise 1s var(--ease) 0.15s forwards;
}

h1.hero-title .accent {
  background: linear-gradient(100deg, var(--gold-deep), var(--gold), var(--gold-bright), var(--gold));
  background-size: 220% auto;
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: shimmer 6s linear infinite;
  font-style: italic;
}

.hero-sub {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.2vw, 1.18rem);
  color: var(--muted-color);
  max-width: 52ch;
  margin: 0 auto 1.8rem;
  opacity: 0;
  animation: rise 1s var(--ease) 0.28s forwards;
}

.authors {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 0.4rem;
  opacity: 0;
  animation: rise 1s var(--ease) 0.4s forwards;
}

.authors .author-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-color);
  padding: 0.35rem;
  padding-inline-end: 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card-color);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.authors .author-chip:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
  color: var(--text-color);
}

.authors .author-chip .av {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  font-size: 0.72rem;
  font-weight: 700;
  color: rgb(30, 20, 4);
  background: linear-gradient(135deg, var(--gold-bright), var(--gold));
}

.hero-affil {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-color);
  margin-bottom: 2rem;
  opacity: 0;
  animation: rise 1s var(--ease) 0.5s forwards;
}

.links-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.9rem;
  opacity: 0;
  animation: rise 1s var(--ease) 0.6s forwards;
}

.links-container a {
  text-decoration: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.92rem;
  padding: 0.72rem 1.4rem;
  border-radius: 999px;
  transition: transform 0.25s var(--ease), box-shadow 0.3s var(--ease),
    background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.btn .bi,
.btn span {
  font-size: 1rem;
}

.btn-primary {
  color: rgb(34, 22, 4);
  background: linear-gradient(135deg, var(--gold-bright), var(--gold));
  border: 1px solid transparent;
  box-shadow: 0 12px 30px -12px var(--glow);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 42px -14px var(--glow);
}

.btn-ghost {
  color: var(--btn-text-color);
  background: var(--card-color);
  border: 1px solid var(--border-strong);
}

.btn-ghost:hover {
  transform: translateY(-3px);
  background: var(--btn-hover-color);
  box-shadow: var(--shadow-sm);
}

.scroll-hint {
  margin-top: 2.6rem;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  color: var(--muted-color);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0;
  animation: rise 1s var(--ease) 0.8s forwards;
}

.scroll-hint .bi {
  font-size: 1.1rem;
  color: var(--gold);
  animation: bob 1.8s ease-in-out infinite;
}

/* =================== MAIN / SECTIONS =================== */
main {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem 2rem;
}

section.card {
  position: relative;
  background:
    linear-gradient(160deg, var(--card-color-2), var(--card-color) 55%);
  border: 1px solid var(--border);
  border-radius: 26px;
  padding: clamp(1.6rem, 4vw, 3rem);
  margin: 2rem 0;
  box-shadow: var(--shadow);
  scroll-margin-top: calc(var(--nav-h) + 18px);
  overflow: hidden;

  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

section.card.in {
  opacity: 1;
  transform: none;
}

/* gold edge accent */
section.card::before {
  content: "";
  position: absolute;
  top: 0;
  inset-inline-start: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--gold-bright), var(--gold), transparent);
  opacity: 0.85;
}

.section-head {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.6rem;
}

.section-icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  flex-shrink: 0;
  border-radius: 16px;
  font-size: 1.5rem;
  color: var(--gold);
  background: var(--card-color-2);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.section-meta {
  display: flex;
  flex-direction: column;
}

.section-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-deep);
}

h2 {
  font-family: var(--font-display);
  font-optical-sizing: auto;
  font-weight: 600;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-align: start;
  margin: 0.1rem 0 0;
}

h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  margin: 2rem 0 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

h3::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--gold);
  border-radius: 2px;
}

p {
  margin: 0.9rem 0;
}

.long {
  font-family: var(--font-serif);
  font-size: 1.06rem;
  line-height: 1.78;
  color: var(--text-color);
}

b, strong {
  color: var(--text-color);
  font-weight: 700;
}

.long strong, .long b {
  color: var(--gold-deep);
}

em {
  color: var(--text-color);
}

a {
  color: var(--link-color);
  text-decoration: underline;
  text-decoration-color: var(--underline-color);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: var(--link-hover-color);
}

ul {
  margin: 0.6rem 0;
}

ul li {
  margin: 0.5rem 0 0.5rem 1.1rem;
}

ul li.long::marker {
  color: var(--gold);
}

.hidden {
  display: none;
}

/* ornamental divider replacing <hr> */
.ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 0.5rem 0;
  color: var(--gold);
}

.ornament::before,
.ornament::after {
  content: "";
  height: 1px;
  flex: 1;
  max-width: 160px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
}

.ornament span {
  font-size: 0.9rem;
  letter-spacing: 0.4em;
  opacity: 0.8;
}

/* =================== KEY RESULTS STRIP =================== */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin: 1.8rem 0 0.5rem;
}

.stat {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.3rem 1.1rem;
  background: var(--card-color-2);
  text-align: center;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.stat:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.stat .num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2.3rem;
  line-height: 1;
  background: linear-gradient(120deg, var(--gold-deep), var(--gold-bright));
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.stat .label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-color);
  margin-top: 0.5rem;
  line-height: 1.4;
}

/* =================== CODE BLOCKS =================== */
pre {
  position: relative;
  margin: 0.8rem 0 1.2rem;
  border-radius: 14px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

/* faux terminal chrome */
pre::before {
  content: "";
  display: block;
  height: 34px;
  background: var(--code-chrome);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

pre::after {
  content: "";
  position: absolute;
  top: 13px;
  left: 14px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #f0a623;
  box-shadow: 16px 0 0 #d97a3a, 32px 0 0 #c9962a;
}

pre code,
pre .hljs {
  display: block;
  background: transparent !important;
  padding: 1rem 1.2rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.6;
  color: rgb(240, 226, 196);
  white-space: pre;
  overflow-x: auto;
  border-radius: 0;
}

code {
  background: transparent;
  border-radius: 0;
}

/* inline tweaks so hljs theme doesn't override our chrome bg */
.hljs {
  background: transparent !important;
}

/* =================== FIGURES =================== */
.figure-container {
  margin: 1.4rem 0;
}

.figure {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--card-color-2);
  padding: 0.6rem;
  box-shadow: var(--shadow-sm);
}

.figure > img,
.figure > video {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
  transition: transform 0.5s var(--ease);
}

.figure > img:hover {
  transform: scale(1.015);
}

.img-small { max-width: 420px; }
.img-medium { max-width: 620px; }

figcaption,
.fig-cap {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--muted-color);
  text-align: center;
  margin-top: 0.6rem;
}

/* =================== FOOTER =================== */
footer {
  width: 100%;
  margin-top: 3rem;
  padding: clamp(2.5rem, 6vw, 4.5rem) 1.5rem 3rem;
  background:
    radial-gradient(ellipse 70% 100% at 50% 0%, var(--pattern-color), transparent 70%),
    var(--header-color);
  border-top: 1px solid var(--border);
  text-align: center;
}

footer > div {
  max-width: var(--maxw);
  margin: 0 auto;
}

.footer-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.6rem;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.project-email {
  margin-bottom: 2.4rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--muted-color);
}

.socials-container > p {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin-bottom: 1.6rem;
}

.socials {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.2rem;
}

.social-card {
  flex: 1 1 240px;
  max-width: 320px;
  text-align: left;
  padding: 1.4rem 1.5rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--card-color);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.social-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.social-card > p {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  margin: 0 0 0.9rem;
}

.socials-list {
  line-height: 2.3;
}

.socials-list > div {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.socials-list .bi {
  color: var(--gold);
  width: 18px;
}

.footer-foot {
  margin-top: 2.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--muted-color);
}

/* =================== ANIMATIONS =================== */
@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: none; }
}

@keyframes shimmer {
  to { background-position: 220% center; }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px var(--glow); }
  50%      { box-shadow: 0 0 0 7px transparent; }
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(5px); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  section.card { opacity: 1; transform: none; }
}

/* =================== OBJECTIVES =================== */
.obj-list {
  list-style: none;
  margin: 1.4rem 0 0.4rem;
  display: grid;
  gap: 0.9rem;
}

.obj-list li {
  position: relative;
  margin: 0;
  padding: 1.1rem 1.2rem 1.1rem 3.4rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card-color-2);
  font-family: var(--font-serif);
  font-size: 1.04rem;
  line-height: 1.7;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.obj-list li:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.obj-list li::before {
  counter-increment: obj;
  content: counter(obj, decimal-leading-zero);
  position: absolute;
  inset-inline-start: 1rem;
  top: 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--gold-deep);
}

.obj-list { counter-reset: obj; }

html[data-lang="ar"] .obj-list li {
  padding: 1.1rem 3.4rem 1.1rem 1.2rem;
  font-family: var(--font-serif);
}

/* =================== TECHNOLOGIES =================== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
  margin: 1.4rem 0 0.4rem;
}

.tech-cat {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.2rem 1.3rem 1.4rem;
  background: var(--card-color-2);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.tech-cat:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.tech-cat h4 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin-bottom: 0.9rem;
}

html[data-lang="ar"] .tech-cat h4 {
  letter-spacing: 0;
  text-transform: none;
  font-size: 0.95rem;
}

.tech-cat h4 .bi { font-size: 0.95rem; }

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--bg-color);
  border: 1px solid var(--border);
  color: var(--text-color);
  white-space: nowrap;
}

/* =================== AGENTS (ACAI chat modes) =================== */
.agents {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.4rem 0;
}

.agent {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.2rem 1.3rem;
  background: var(--card-color-2);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.agent:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.agent-name {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.agent-name .ar-name {
  font-family: "Amiri", serif;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--gold-deep);
}

.agent-name .en-name {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--muted-color);
}

.agent p {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
  color: var(--text-color);
}

/* layered architecture mini-diagram */
.layers {
  display: grid;
  gap: 0.6rem;
  margin: 1.4rem 0;
}

.layer {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.9rem 1.2rem;
  background: var(--card-color-2);
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.layer .lyr-tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgb(34, 22, 4);
  background: linear-gradient(135deg, var(--gold-bright), var(--gold));
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  flex-shrink: 0;
}

html[data-lang="ar"] .layer .lyr-tag { letter-spacing: 0; text-transform: none; }

.layer span:last-child {
  font-family: var(--font-serif);
  font-size: 0.96rem;
}

/* =================== CONCLUSION blocks =================== */
.concl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 1.4rem 0 0.4rem;
}

.concl-card {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.3rem 1.4rem;
  background: var(--card-color-2);
}

.concl-card h4 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
}

.concl-card h4 .bi { color: var(--gold); }

.concl-card p {
  font-family: var(--font-serif);
  font-size: 0.98rem;
  line-height: 1.7;
  margin: 0;
}

/* =================== TEAM =================== */
.team-note {
  font-family: var(--font-serif);
  font-size: 1.04rem;
  line-height: 1.8;
  padding: 1.2rem 1.4rem;
  border-inline-start: 4px solid var(--gold);
  background: var(--card-color-2);
  border-radius: 0 14px 14px 0;
  margin: 1.2rem 0 1.6rem;
}

html[data-lang="ar"] .team-note { border-radius: 14px 0 0 14px; }

.team-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.92rem;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid var(--border);
}

.team-table th,
.team-table td {
  padding: 0.85rem 1rem;
  text-align: start;
  border-bottom: 1px solid var(--border);
}

.team-table thead th {
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-deep);
  background: var(--card-color-2);
}

html[data-lang="ar"] .team-table thead th { letter-spacing: 0; text-transform: none; font-size: 0.85rem; }

.team-table tbody tr:last-child td { border-bottom: none; }
.team-table tbody td { font-family: var(--font-serif); }
.team-table a { font-family: var(--font-mono); font-size: 0.82rem; }

.supervisor-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  margin-top: 1.4rem;
  padding: 0.7rem 1.2rem 0.7rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--card-color-2);
}

.supervisor-chip .av {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  font-size: 0.9rem;
  color: rgb(30, 20, 4);
  background: linear-gradient(135deg, var(--gold-bright), var(--gold));
}

.supervisor-chip .sv-meta { display: flex; flex-direction: column; line-height: 1.25; text-align: start; }
.supervisor-chip .sv-role { font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted-color); }
html[data-lang="ar"] .supervisor-chip .sv-role { letter-spacing: 0; text-transform: none; font-family: "Tajawal", sans-serif; }
.supervisor-chip .sv-name { font-weight: 700; }

.table-wrap { overflow-x: auto; }

/* =================== HERO LOGOS (UOB + ACAI) =================== */
.hero-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.1rem;
  margin-bottom: 1.6rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.02s forwards;
}

.hero-logos .logo-pill {
  display: grid;
  place-items: center;
  height: 72px;
  padding: 0 1.1rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
}

.hero-logos .logo-pill img {
  height: 52px;
  width: auto;
  display: block;
}

.hero-logos .logo-div {
  width: 1px;
  height: 44px;
  background: var(--border-strong);
}

@media screen and (max-width: 520px) {
  .hero-logos .logo-pill { height: 60px; }
  .hero-logos .logo-pill img { height: 40px; }
}

/* =================== ELEVATOR PITCH (two videos) =================== */
.pitch-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
  margin: 1.4rem 0;
}

.pitch-item {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--card-color-2);
  padding: 0.9rem;
  box-shadow: var(--shadow-sm);
}

.pitch-item .pitch-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin: 0.1rem 0 0.7rem 0.2rem;
}

html[data-lang="ar"] .pitch-item .pitch-label {
  letter-spacing: 0;
  text-transform: none;
  font-size: 0.95rem;
  font-family: "Tajawal", sans-serif;
}

.pitch-item .pitch-label .flag {
  font-size: 0.95rem;
}

.pitch-item video {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
}

@media screen and (max-width: 680px) {
  .pitch-grid { grid-template-columns: 1fr; }
}

/* =================== RESPONSIVE =================== */
@media screen and (max-width: 760px) {
  nav.topnav ul { gap: 0.7rem; }
  nav.topnav a.nav-link { font-size: 0.74rem; }
  .nav-brand-text span { display: none; }
  .nav-cta span.cta-text { display: none; }
  .nav-cta { padding: 0.5rem 0.7rem; }
  .section-head { gap: 0.8rem; }
  .section-icon { width: 46px; height: 46px; font-size: 1.25rem; }
}

@media screen and (max-width: 520px) {
  nav.topnav { flex-wrap: wrap; }
  nav.topnav ul { order: 3; width: 100%; }
}