/* ========================================================
   KURAN PETROLEUM — shared design tokens & chrome
   ======================================================== */

:root {
  /* Default (dark) theme */
  --bg: #0a0d0f;
  --bg-elev: #12171a;
  --bg-elev-2: #1a2024;
  --ink: #f4f1ea;
  --ink-dim: #8a9097;
  --ink-faint: #4a5056;
  --rule: rgba(244, 241, 234, 0.08);
  --rule-strong: rgba(244, 241, 234, 0.18);
  --accent: #e8a33d;       /* amber / crude */
  --accent-soft: #6b5638;
  --steel: #5b8fb9;        /* data / blueprint */
  --danger: #c94a3e;
  --ok: #7fb069;

  /* Typography stacks (tweakable) */
  --font-display: 'Instrument Serif', 'Times New Roman', serif;
  --font-body: 'Geist', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'Geist Mono', 'JetBrains Mono', ui-monospace, Menlo, monospace;

  /* Motion */
  --motion: 1; /* 0 = off, 1 = normal, 1.5 = heavy */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  /* Layout */
  --maxw: 1440px;
  --gutter: clamp(20px, 4vw, 64px);
  --nav-h: 72px;
}

:root[data-theme='light'] {
  --bg: #f4f1ea;
  --bg-elev: #ebe7dd;
  --bg-elev-2: #e0dcd0;
  --ink: #15181a;
  --ink-dim: #565b62;
  --ink-faint: #8a8f95;
  --rule: rgba(21, 24, 26, 0.1);
  --rule-strong: rgba(21, 24, 26, 0.22);
  --accent: #b87a22;
  --accent-soft: #d9b078;
  --steel: #3a6a8f;
}

/* =========== Reset / base =========== */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  font-feature-settings: 'ss01', 'cv11';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

::selection { background: var(--accent); color: var(--bg); }

/* =========== Typography =========== */

.display {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.02em;
  font-style: normal;
  text-wrap: balance;
}

.mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.mono-sm { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-dim); }

h1, h2, h3, h4 { margin: 0; font-weight: 400; }
p { margin: 0; text-wrap: pretty; }

/* =========== Nav =========== */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  padding: 0 var(--gutter);
  background: color-mix(in oklab, var(--bg) 78%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--rule);
  transition: transform 0.4s var(--ease-out);
}

.nav__inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 48px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 0.01em;
}

.brand__mark {
  width: 22px; height: 22px;
  display: inline-grid;
  place-items: center;
  position: relative;
}
.brand__mark::before {
  content: '';
  position: absolute; inset: 0;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
}
.brand__mark::after {
  content: '';
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
}

.brand__name { font-weight: 500; }
.brand__sub { font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.2em; color: var(--ink-dim); margin-left: 6px; text-transform: uppercase; }

.nav__links {
  display: flex;
  gap: 2px;
  justify-self: center;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 4px;
}
.nav__link {
  padding: 8px 16px;
  font-size: 13px;
  border-radius: 999px;
  color: var(--ink-dim);
  letter-spacing: -0.005em;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}
.nav__link:hover { color: var(--ink); }
.nav__link.is-active {
  color: var(--ink);
  background: var(--bg-elev-2);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--accent);
  color: #0a0d0f;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  transition: transform 0.2s, filter 0.2s;
}
.nav__cta:hover { transform: translateY(-1px); filter: brightness(1.08); }

.nav__burger { display: none; }

@media (max-width: 960px) {
  .nav__inner { grid-template-columns: auto 1fr auto; }
  .nav__links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    flex-direction: column;
    border-radius: 0;
    padding: 20px var(--gutter);
    background: var(--bg);
    border-bottom: 1px solid var(--rule);
    transform: translateY(-120%);
    transition: transform 0.4s var(--ease-out);
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__burger {
    display: inline-flex;
    width: 38px; height: 38px;
    border-radius: 8px;
    background: var(--bg-elev);
    border: 1px solid var(--rule);
    align-items: center; justify-content: center;
  }
  .nav__burger span {
    display: block; width: 16px; height: 1.5px; background: var(--ink);
    position: relative;
  }
  .nav__burger span::before, .nav__burger span::after {
    content: ''; position: absolute; left: 0; width: 16px; height: 1.5px; background: var(--ink);
  }
  .nav__burger span::before { top: -5px; }
  .nav__burger span::after { top: 5px; }
}

/* =========== Page shell =========== */

main { padding-top: var(--nav-h); }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }

.section {
  padding: clamp(60px, 10vw, 140px) 0;
  position: relative;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: ''; width: 6px; height: 6px; background: var(--accent); border-radius: 50%;
}

/* =========== Footer =========== */

.footer {
  border-top: 1px solid var(--rule);
  padding: 80px var(--gutter) 40px;
  background: var(--bg-elev);
  margin-top: 40px;
}
.footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--rule);
}
@media (max-width: 800px) { .footer__inner { grid-template-columns: 1fr 1fr; } }
.footer h4 { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-dim); margin-bottom: 20px; }
.footer__nav a { display: block; padding: 6px 0; color: var(--ink); font-size: 14px; }
.footer__nav a:hover { color: var(--accent); }
.footer__bottom {
  max-width: var(--maxw); margin: 0 auto;
  padding-top: 32px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-dim);
}
.footer__logo {
  font-family: var(--font-display); font-size: 36px; line-height: 1;
  margin-bottom: 20px;
}

/* =========== Reveal on scroll =========== */

[data-reveal] {
  opacity: 0;
  transform: translateY(calc(24px * var(--motion)));
  transition:
    opacity calc(0.8s * var(--motion)) var(--ease-out),
    transform calc(0.8s * var(--motion)) var(--ease-out);
  transition-delay: var(--reveal-delay, 0s);
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* =========== Placeholder image =========== */

.ph {
  position: relative;
  background:
    repeating-linear-gradient(135deg,
      color-mix(in oklab, var(--ink) 4%, transparent) 0,
      color-mix(in oklab, var(--ink) 4%, transparent) 2px,
      transparent 2px, transparent 10px),
    var(--bg-elev-2);
  border: 1px solid var(--rule);
  overflow: hidden;
  border-radius: 2px;
  display: flex;
  align-items: flex-end;
  padding: 16px;
  color: var(--ink-dim);
}
.ph__label {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase;
}
.ph::before {
  content: '';
  position: absolute; top: 12px; right: 12px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

/* =========== Grain / atmosphere =========== */

.grain::before {
  content: '';
  position: fixed; inset: 0; pointer-events: none; z-index: 1;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* =========== Buttons =========== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: -0.005em;
  transition: transform 0.25s var(--ease-out), background 0.25s, color 0.25s, border-color 0.25s;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--accent); color: #0a0d0f; }
.btn--primary:hover { filter: brightness(1.08); }
.btn--ghost { border-color: var(--rule-strong); color: var(--ink); }
.btn--ghost:hover { background: var(--bg-elev); }
.btn__arrow { width: 14px; height: 14px; transition: transform 0.25s; }
.btn:hover .btn__arrow { transform: translateX(3px); }

/* =========== Tweaks panel =========== */

.tweaks {
  position: fixed;
  bottom: 24px; right: 24px;
  width: 300px;
  background: var(--bg-elev);
  border: 1px solid var(--rule-strong);
  border-radius: 14px;
  padding: 18px;
  z-index: 200;
  font-size: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  display: none;
}
.tweaks.is-open { display: block; }
.tweaks__title { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-dim); margin-bottom: 14px; display: flex; justify-content: space-between; }
.tweaks__title button { color: var(--ink-dim); }
.tweaks__row { margin-bottom: 14px; }
.tweaks__label { display: block; margin-bottom: 6px; color: var(--ink-dim); font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; }
.tweaks__opts { display: flex; gap: 6px; flex-wrap: wrap; }
.tweaks__opt {
  padding: 6px 10px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  font-size: 11px;
  background: var(--bg);
  color: var(--ink-dim);
}
.tweaks__opt.is-active { border-color: var(--accent); color: var(--accent); }
.tweaks__swatch {
  width: 22px; height: 22px; border-radius: 50%;
  border: 2px solid var(--rule);
  cursor: pointer;
}
.tweaks__swatch.is-active { border-color: var(--ink); }

/* =========== Util =========== */
.divider { height: 1px; background: var(--rule); margin: 40px 0; }
.dim { color: var(--ink-dim); }
.faint { color: var(--ink-faint); }
.accent { color: var(--accent); }

[data-lang='ar'] body { direction: rtl; }
[data-lang='ar'] .nav__inner { direction: rtl; }