/* ============================================================
   DARUL FALLAH — Design System
   Navy + Gold · Ivy League · Cormorant + Inter
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* palette — light */
  --navy-900: #060F24;
  --navy-800: #0A1F44;
  --navy-700: #132E5E;
  --navy-600: #1F4078;
  --gold-600: #A8873F;
  --gold-500: #C9A961;
  --gold-400: #D9BE81;
  --gold-100: #F3E9D0;
  --cream:    #F7F3EC;
  --paper:    #FBF9F4;
  --ink:      #0E1628;
  --ink-70:   rgba(14, 22, 40, 0.72);
  --ink-50:   rgba(14, 22, 40, 0.54);
  --ink-20:   rgba(14, 22, 40, 0.18);
  --ink-08:   rgba(14, 22, 40, 0.08);
  --line:     rgba(14, 22, 40, 0.10);

  /* semantic */
  --bg:         var(--paper);
  --bg-elev:    #ffffff;
  --bg-alt:     var(--cream);
  --fg:         var(--ink);
  --fg-muted:   var(--ink-70);
  --fg-subtle:  var(--ink-50);
  --border:     var(--line);
  --accent:     var(--navy-800);
  --accent-2:   var(--gold-500);

  /* type */
  --font-serif: 'Cormorant Garamond', 'Times New Roman', serif;
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* density (tweakable) */
  --density: 1;
  --space-1: calc(4px * var(--density));
  --space-2: calc(8px * var(--density));
  --space-3: calc(12px * var(--density));
  --space-4: calc(16px * var(--density));
  --space-5: calc(24px * var(--density));
  --space-6: calc(32px * var(--density));
  --space-7: calc(48px * var(--density));
  --space-8: calc(64px * var(--density));
  --space-9: calc(96px * var(--density));
  --space-10: calc(128px * var(--density));

  --radius-sm: 6px;
  --radius:    12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 1px 2px rgba(10, 31, 68, 0.06), 0 1px 3px rgba(10, 31, 68, 0.04);
  --shadow:    0 4px 12px rgba(10, 31, 68, 0.08), 0 2px 4px rgba(10, 31, 68, 0.04);
  --shadow-lg: 0 24px 48px rgba(10, 31, 68, 0.14), 0 8px 16px rgba(10, 31, 68, 0.06);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-smooth: cubic-bezier(0.65, 0, 0.35, 1);
}

[data-theme='dark'] {
  --bg:         #060F24;
  --bg-elev:    #0D1A35;
  --bg-alt:     #091530;
  --fg:         #F3EEDF;
  --fg-muted:   rgba(243, 238, 223, 0.72);
  --fg-subtle:  rgba(243, 238, 223, 0.50);
  --border:     rgba(243, 238, 223, 0.12);
  --accent:     var(--gold-500);
  --accent-2:   var(--gold-500);
  --ink-08:     rgba(243, 238, 223, 0.06);
  --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow:     0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg:  0 24px 48px rgba(0, 0, 0, 0.5);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
  text-wrap: pretty;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

/* ---------- type ---------- */
.serif   { font-family: var(--font-serif); font-weight: 500; letter-spacing: -0.01em; }
.sans    { font-family: var(--font-sans); }
.eyebrow {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-2);
}
.display {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.025em;
}
h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 500; letter-spacing: -0.015em; line-height: 1.1; margin: 0; }
h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); }
h2 { font-size: clamp(2rem, 3.6vw, 3rem); }
h3 { font-size: clamp(1.4rem, 2vw, 1.75rem); }
h4 { font-size: 1.15rem; }
p  { margin: 0; color: var(--fg-muted); }

/* ---------- layout primitives ---------- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}
.section {
  padding: var(--space-10) 0;
}
@media (max-width: 720px) {
  .section { padding: var(--space-9) 0; }
}
.divider {
  width: 48px; height: 1px; background: var(--accent-2);
  margin: var(--space-4) 0 var(--space-5);
}
.section-head {
  display: flex; flex-direction: column; gap: var(--space-3);
  max-width: 760px; margin-bottom: var(--space-8);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px;
  font-family: var(--font-sans); font-size: 14px; font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.4s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--navy-800); color: #F7F3EC;
}
[data-theme='dark'] .btn-primary { background: var(--gold-500); color: var(--navy-900); }
.btn-primary:hover { box-shadow: var(--shadow-lg); }
.btn-ghost {
  background: transparent; color: var(--fg); border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--accent-2); color: var(--accent-2); }
.btn-gold {
  background: var(--gold-500); color: var(--navy-900);
}
.btn-gold:hover { background: var(--gold-400); }
.btn-arrow svg { transition: transform 0.35s var(--ease); }
.btn-arrow:hover svg { transform: translateX(4px); }

/* ---------- nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 80;
  background: transparent;
  transition: background 0.4s var(--ease), box-shadow 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 0;
}
.nav.scrolled {
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav.scrolled .nav-inner { padding: 14px 0; }
.nav-brand { display: flex; align-items: center; gap: 12px; }
.nav-crest {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--navy-800);
  color: var(--gold-500);
  display: grid; place-items: center;
  font-family: var(--font-serif); font-weight: 600; font-size: 18px;
  border: 1px solid var(--gold-500);
  flex-shrink: 0;
  overflow: hidden;
}
.nav-crest img { background: #fff; padding: 3px; width: 100%; height: 100%; object-fit: contain; border-radius: inherit; }
[data-theme='dark'] .nav-crest { background: var(--gold-500); color: var(--navy-900); border-color: var(--gold-400); }
.nav-name { display: flex; flex-direction: column; line-height: 1.05; }
.nav-name .n1 { font-family: var(--font-serif); font-size: 18px; font-weight: 600; letter-spacing: -0.01em; }
.nav-name .n2 { font-size: 10px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--fg-subtle); }

.nav-hero-on:not(.scrolled) .nav-name { color: #F7F3EC; }
.nav-hero-on:not(.scrolled) .nav-name .n2 { color: rgba(247, 243, 236, 0.7); }
.nav-hero-on:not(.scrolled) .nav-crest { background: transparent; border-color: var(--gold-500); color: var(--gold-500); }
.nav-hero-on:not(.scrolled) .nav-links a { color: #F7F3EC; }
.nav-hero-on:not(.scrolled) .nav-actions .btn-ghost { color: #F7F3EC; border-color: rgba(247, 243, 236, 0.3); }
.nav-hero-on:not(.scrolled) .icon-btn { color: #F7F3EC; }

.nav-links {
  display: flex; gap: 6px;
  list-style: none; margin: 0; padding: 0;
}
.nav-links a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 14px; font-weight: 500;
  border-radius: 999px;
  color: var(--fg);
  transition: color 0.3s var(--ease), background 0.3s var(--ease);
  position: relative;
}
.nav-links a.active { color: var(--accent-2); }
.nav-links a:hover { color: var(--accent-2); }

.nav-actions { display: flex; align-items: center; gap: 10px; }
.icon-btn {
  width: 40px; height: 40px; display: grid; place-items: center;
  border-radius: 50%; border: 1px solid transparent;
  background: transparent; color: var(--fg);
  cursor: pointer; transition: all 0.3s var(--ease);
}
.icon-btn:hover { background: var(--ink-08); }
[data-theme='dark'] .icon-btn:hover { background: rgba(243,238,223,0.08); }

.nav-toggle { display: none; }

@media (max-width: 960px) {
  .nav-links, .nav-actions .btn { display: none; }
  .nav-toggle { display: grid; }
}

.mobile-menu {
  position: fixed; inset: 0;
  background: var(--bg);
  z-index: 90;
  padding: 100px 32px 32px;
  transform: translateY(-100%);
  transition: transform 0.5s var(--ease-smooth);
  overflow-y: auto;
}
.mobile-menu.open { transform: translateY(0); }
.mobile-menu ul { list-style: none; padding: 0; margin: 0; }
.mobile-menu li { border-bottom: 1px solid var(--border); }
.mobile-menu a {
  display: block;
  padding: 20px 0;
  font-family: var(--font-serif); font-size: 28px;
}
.mobile-menu-close {
  position: absolute; top: 24px; right: 24px;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  height: 100vh; min-height: 640px;
  overflow: hidden;
  color: #F7F3EC;
}
.hero-slides { position: absolute; inset: 0; }
.hero-slide {
  position: absolute; inset: 0;
  opacity: 0;
  transition: opacity 1.4s var(--ease-smooth);
}
.hero-slide.active { opacity: 1; }
.hero-slide-bg {
  position: absolute; inset: 0;
  will-change: transform;
}
.hero-slide-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 15, 36, 0.3) 0%, rgba(6, 15, 36, 0.5) 40%, rgba(6, 15, 36, 0.85) 100%),
    radial-gradient(ellipse at 30% 30%, rgba(201, 169, 97, 0.08), transparent 60%);
}
.hero-content {
  position: relative; z-index: 2;
  height: 100%;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding-bottom: clamp(80px, 14vh, 160px);
}
.hero-eyebrow {
  font-size: 12px; font-weight: 500;
  letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--gold-400);
  opacity: 0; transform: translateY(20px);
  animation: fadeUp 1s var(--ease-smooth) 0.2s forwards;
}
.hero-title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2.8rem, 7vw, 6rem);
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin-top: 24px;
  max-width: 900px;
  white-space: pre-line;
  opacity: 0; transform: translateY(30px);
  animation: fadeUp 1.2s var(--ease-smooth) 0.4s forwards;
}
.hero-title em { font-style: italic; color: var(--gold-400); font-weight: 400; }
.hero-sub {
  margin-top: 28px;
  max-width: 540px;
  font-size: 17px;
  color: rgba(247, 243, 236, 0.82);
  opacity: 0; transform: translateY(20px);
  animation: fadeUp 1s var(--ease-smooth) 0.6s forwards;
}
.hero-cta {
  display: flex; gap: 14px; flex-wrap: wrap;
  margin-top: 36px;
  opacity: 0; transform: translateY(20px);
  animation: fadeUp 1s var(--ease-smooth) 0.8s forwards;
}
.hero-cta .btn-ghost {
  color: #F7F3EC; border-color: rgba(247,243,236,0.3);
}
.hero-cta .btn-ghost:hover { border-color: var(--gold-500); color: var(--gold-500); }

/* hero slide indicators */
.hero-nav {
  position: absolute; bottom: 32px; left: 0; right: 0;
  z-index: 3;
  display: flex; justify-content: space-between; align-items: center;
  padding: 0 clamp(20px, 4vw, 48px);
}
.hero-dots { display: flex; gap: 10px; }
.hero-dot {
  width: 28px; height: 2px;
  background: rgba(247,243,236,0.3);
  border: none; padding: 0; cursor: pointer;
  transition: all 0.5s var(--ease);
  position: relative; overflow: hidden;
}
.hero-dot.active { width: 64px; background: rgba(247,243,236,0.2); }
.hero-dot.active::after {
  content: ''; position: absolute; inset: 0;
  background: var(--gold-500);
  transform-origin: left;
  animation: fillDot 7s linear forwards;
}
.hero-counter {
  font-family: var(--font-serif); font-size: 14px;
  color: rgba(247,243,236,0.7);
  letter-spacing: 0.1em;
}
.hero-counter b { color: var(--gold-500); font-weight: 500; }

.hero-scroll {
  position: absolute;
  bottom: 64px; right: 48px;
  display: flex; align-items: center; gap: 12px;
  color: rgba(247,243,236,0.7);
  font-size: 11px; letter-spacing: 0.25em; text-transform: uppercase;
  writing-mode: vertical-rl; transform: rotate(180deg);
  z-index: 3;
}
.hero-scroll::after {
  content: ''; display: block;
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--gold-500), transparent);
  animation: scrollHint 2.2s ease-in-out infinite;
}
@media (max-width: 820px) { .hero-scroll { display: none; } }

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fillDot {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}
@keyframes scrollHint {
  0%, 100% { transform: scaleY(1); transform-origin: top; opacity: 0.5; }
  50%      { transform: scaleY(0.3); transform-origin: bottom; opacity: 1; }
}

/* ---------- placeholder (textured image) ---------- */
.ph {
  position: relative;
  background:
    repeating-linear-gradient(135deg, rgba(10,31,68,0.04) 0 2px, transparent 2px 14px),
    linear-gradient(135deg, #D9CFB8 0%, #C3B89C 100%);
  overflow: hidden;
  display: grid; place-items: center;
  color: rgba(10,31,68,0.6);
}
.ph::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 30%, rgba(255,255,255,0.3), transparent 50%);
}
.ph-label {
  position: relative;
  font-family: 'SF Mono', 'JetBrains Mono', 'Courier New', monospace;
  font-size: 10px; letter-spacing: 0.15em;
  color: rgba(10,31,68,0.6);
  padding: 4px 8px;
  border: 1px solid rgba(10,31,68,0.2);
  background: rgba(247,243,236,0.5);
  backdrop-filter: blur(4px);
}
.ph-hero {
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,0.03) 0 3px, transparent 3px 18px),
    linear-gradient(135deg, #0A1F44 0%, #132E5E 50%, #1F4078 100%);
}
.ph-hero::before {
  background: radial-gradient(ellipse at 60% 40%, rgba(201,169,97,0.2), transparent 55%);
}
.ph-hero .ph-label {
  color: rgba(247,243,236,0.8);
  border-color: rgba(201,169,97,0.4);
  background: rgba(6,15,36,0.4);
}
[data-theme='dark'] .ph:not(.ph-hero) {
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,0.02) 0 2px, transparent 2px 14px),
    linear-gradient(135deg, #1A2A4A 0%, #0F1E3A 100%);
}
[data-theme='dark'] .ph:not(.ph-hero) .ph-label {
  color: rgba(243,238,223,0.7);
  border-color: rgba(201,169,97,0.3);
  background: rgba(6,15,36,0.5);
}

/* ---------- card ---------- */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease), border-color 0.5s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-2);
}

/* ---------- scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 1s var(--ease), transform 1s var(--ease);
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

/* ---------- footer ---------- */
.footer {
  background: var(--navy-900);
  color: #F7F3EC;
  padding: var(--space-10) 0 var(--space-6);
  margin-top: var(--space-10);
}
[data-theme='dark'] .footer { background: #020814; border-top: 1px solid rgba(201,169,97,0.12); }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-7);
}
@media (max-width: 820px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-6); }
}
@media (max-width: 540px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer h5 {
  font-family: var(--font-sans);
  font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--gold-500); margin: 0 0 20px;
  font-weight: 500;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 12px; }
.footer a { color: rgba(247,243,236,0.7); font-size: 14px; transition: color 0.3s var(--ease); }
.footer a:hover { color: var(--gold-500); }
.footer-logo {
  font-family: var(--font-serif);
  font-size: 28px; font-weight: 600; letter-spacing: -0.01em;
  color: #F7F3EC; margin-bottom: 16px;
}
.footer-copy {
  padding-top: var(--space-5); margin-top: var(--space-7);
  border-top: 1px solid rgba(247,243,236,0.08);
  font-size: 12px; color: rgba(247,243,236,0.5);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}

/* ---------- page hero (for inner pages) ---------- */
.page-hero {
  position: relative;
  padding: 180px 0 var(--space-9);
  background: var(--bg-alt);
  overflow: hidden;
}
[data-theme='dark'] .page-hero { background: var(--bg-elev); }
.page-hero-inner { max-width: 800px; }
.page-hero .eyebrow { margin-bottom: 20px; display: block; }
.page-hero h1 { font-size: clamp(2.6rem, 6vw, 5rem); }
.page-hero p { font-size: 19px; margin-top: 24px; max-width: 640px; }
.page-hero-deco {
  position: absolute; top: 0; right: -10%; width: 50%; height: 100%;
  background:
    repeating-linear-gradient(135deg, rgba(201,169,97,0.05) 0 2px, transparent 2px 14px);
  pointer-events: none;
  mask-image: linear-gradient(270deg, black, transparent 80%);
  -webkit-mask-image: linear-gradient(270deg, black, transparent 80%);
}

/* ---------- chip / tag ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px;
  font-size: 11px; font-weight: 500; letter-spacing: 0.15em;
  text-transform: uppercase;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  background: transparent;
  cursor: pointer;
  transition: all 0.3s var(--ease);
}
.chip:hover, .chip.active {
  background: var(--accent);
  color: #F7F3EC;
  border-color: var(--accent);
}
[data-theme='dark'] .chip.active, [data-theme='dark'] .chip:hover {
  background: var(--gold-500); color: var(--navy-900); border-color: var(--gold-500);
}

/* ---------- loading ---------- */
.page-loader {
  position: fixed; inset: 0;
  background: var(--bg);
  display: grid; place-items: center;
  z-index: 9999;
  transition: opacity 0.8s var(--ease), visibility 0.8s var(--ease);
}
.page-loader.done { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-crest {
  width: 80px; height: 80px; border-radius: 50%;
  border: 1px solid var(--border);
  display: grid; place-items: center;
  font-family: var(--font-serif); font-size: 32px; color: var(--accent-2);
  position: relative;
  animation: crestPulse 2s ease-in-out infinite;
  overflow: hidden;
}
.loader-crest img { width: 72%; height: 72%; object-fit: contain; }
.loader-crest::before {
  content: ''; position: absolute; inset: -6px;
  border-radius: 50%;
  border: 1px solid var(--accent-2);
  opacity: 0.3;
  animation: crestRing 2s ease-out infinite;
}
@keyframes crestPulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.05); } }
@keyframes crestRing {
  0% { transform: scale(1); opacity: 0.5; }
  100% { transform: scale(1.4); opacity: 0; }
}

/* ---------- tweaks panel ---------- */
.tweaks {
  position: fixed; bottom: 24px; right: 24px;
  z-index: 200;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  display: none;
  min-width: 240px;
}
.tweaks.visible { display: block; }
.tweaks h6 {
  font-family: var(--font-serif);
  font-size: 15px; font-weight: 600; margin: 0 0 12px;
  color: var(--accent-2);
}
.tweak-row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.tweak-row label { font-size: 11px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--fg-subtle); }
.tweak-row input[type='range'] { width: 100%; accent-color: var(--accent-2); }
.tweak-segments { display: flex; gap: 4px; background: var(--ink-08); padding: 3px; border-radius: 999px; }
.tweak-segments button {
  flex: 1; padding: 6px 10px;
  background: transparent; border: none;
  font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--fg-muted); cursor: pointer;
  border-radius: 999px;
  transition: all 0.3s var(--ease);
  font-family: var(--font-sans);
}
.tweak-segments button.active {
  background: var(--bg-elev); color: var(--accent-2);
  box-shadow: var(--shadow-sm);
}