/* ==========================================================================
   Sultan Studios — styles
   Structure: tokens → base → layout → components → sections → utilities
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root {
  --bg: #0a0b0d;
  --bg-alt: #0e1013;
  --surface: #14171b;
  --surface-hi: #1a1e23;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #eceff3;
  --muted: #a0a8b3;
  --silver-1: #ffffff;
  --silver-2: #c7ccd4;
  --silver-3: #8b929c;
  --silver-grad: linear-gradient(180deg, #ffffff 0%, #c9ced6 55%, #8e959f 100%);

  --font: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Roboto, Arial, sans-serif;

  --container: 72rem;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --header-h: 4.25rem;
  --radius: 1rem;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  -webkit-text-size-adjust: 100%;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
h1, h2, h3, p, ul { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--silver-1);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute; left: 1rem; top: -4rem; z-index: 100;
  padding: 0.6rem 1rem; background: var(--silver-1); color: #000; border-radius: 0.5rem; font-weight: 600;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 1rem; }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.icon {
  width: 1.5rem; height: 1.5rem;
  fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
}

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.narrow { max-width: 50rem; }
.center { text-align: center; }

.section { position: relative; padding-block: clamp(4.5rem, 10vw, 8rem); }
.section-alt { background: linear-gradient(180deg, var(--bg-alt), var(--bg)); border-block: 1px solid var(--line); }
.section-head { max-width: 42rem; margin-bottom: clamp(2.25rem, 5vw, 3.5rem); }

/* ---------- Typography ---------- */
h1, h2, h3 { font-weight: 600; letter-spacing: -0.02em; line-height: 1.12; text-wrap: balance; }
h1 { font-size: clamp(2.25rem, 1.4rem + 4.2vw, 4.25rem); font-weight: 650; }
h2 { font-size: clamp(1.9rem, 1.3rem + 2.6vw, 3rem); }
h3 { font-size: 1.2rem; letter-spacing: -0.01em; line-height: 1.3; }

.silver {
  background: var(--silver-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

.kicker {
  display: flex; align-items: center; gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase; color: var(--silver-2);
}
.kicker::before { content: ""; width: 2rem; height: 1px; background: var(--silver-3); }
.center .kicker { justify-content: center; }

.lead { font-size: clamp(1.05rem, 1rem + 0.5vw, 1.25rem); color: var(--muted); max-width: 36rem; }

.prose { margin-top: 2rem; display: grid; gap: 1.25rem; color: var(--muted); max-width: 42rem; }
.prose .big { color: var(--text); font-size: clamp(1.15rem, 1.05rem + 0.6vw, 1.4rem); line-height: 1.55; }

.statement {
  font-size: 0.8rem; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--silver-3);
}

/* ---------- Header / nav ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  height: var(--header-h);
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease), backdrop-filter 0.3s;
}
.site-header.is-scrolled,
.site-header.menu-open {
  background: rgba(10, 11, 13, 0.82);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }

.brand { display: inline-flex; align-items: center; gap: 0.75rem; }
.brand img { width: 46px; height: auto; }
.brand-text { font-weight: 700; font-size: 0.95rem; letter-spacing: 0.22em; color: var(--text); white-space: nowrap; }
.brand-text span { font-weight: 500; color: var(--silver-3); }

.nav-toggle {
  display: inline-grid; place-items: center;
  width: 2.75rem; height: 2.75rem;
  background: transparent; border: 1px solid var(--line-strong); border-radius: 0.75rem;
  color: var(--text); cursor: pointer;
}
.nav-toggle .bars, .nav-toggle .bars::before, .nav-toggle .bars::after {
  display: block; width: 1.2rem; height: 1.5px; background: currentColor; border-radius: 2px;
  transition: transform 0.3s var(--ease), background-color 0.2s;
}
.nav-toggle .bars { position: relative; }
.nav-toggle .bars::before, .nav-toggle .bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle .bars::before { top: -6px; }
.nav-toggle .bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bars::after { transform: translateY(-6px) rotate(-45deg); }

/* mobile nav panel */
.site-nav {
  position: fixed; inset: var(--header-h) 0 auto 0;
  background: rgba(10, 11, 13, 0.97);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  padding: 0.5rem var(--gutter) 1.5rem;
  visibility: hidden; opacity: 0; transform: translateY(-0.5rem);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0s linear 0.25s;
}
.site-nav.is-open { visibility: visible; opacity: 1; transform: none; transition-delay: 0s; }
.site-nav a {
  display: block; padding: 0.95rem 0; border-bottom: 1px solid var(--line);
  font-size: 1.05rem; color: var(--muted); transition: color 0.2s;
}
.site-nav li:last-child a { border-bottom: 0; }
.site-nav a:hover, .site-nav a.is-active { color: var(--silver-1); }

@media (min-width: 52rem) {
  .nav-toggle { display: none; }
  .site-nav {
    position: static; visibility: visible; opacity: 1; transform: none; background: none; border: 0; padding: 0;
    -webkit-backdrop-filter: none; backdrop-filter: none;
  }
  .site-nav ul { display: flex; gap: 0.25rem; }
  .site-nav a {
    position: relative; padding: 0.5rem 0.9rem; border: 0; font-size: 0.92rem; letter-spacing: 0.02em;
  }
  .site-nav a::after {
    content: ""; position: absolute; left: 0.9rem; right: 0.9rem; bottom: 0.15rem; height: 1px;
    background: var(--silver-2); transform: scaleX(0); transform-origin: left; transition: transform 0.3s var(--ease);
  }
  .site-nav a:hover::after, .site-nav a.is-active::after { transform: scaleX(1); }
}

/* ---------- Background effects ---------- */
.hero-bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.hero-bg .grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 75%);
  opacity: 0.55;
  animation: grid-drift 40s linear infinite;
}
.glow { position: absolute; border-radius: 50%; filter: blur(70px); }
.glow-a { width: 42rem; height: 42rem; right: -8rem; top: -10rem; background: radial-gradient(circle, rgba(190, 198, 210, 0.2), transparent 65%); animation: glow-float 14s ease-in-out infinite alternate; }
.glow-b { width: 30rem; height: 30rem; left: -10rem; bottom: -8rem; background: radial-gradient(circle, rgba(140, 150, 165, 0.12), transparent 65%); animation: glow-float 18s ease-in-out infinite alternate-reverse; }

@keyframes grid-drift { to { background-position: 64px 64px, 64px 64px; } }
@keyframes glow-float { from { transform: translate3d(0, 0, 0); } to { transform: translate3d(-2rem, 2rem, 0); } }
@keyframes logo-float { from { transform: translateY(0); } to { transform: translateY(-10px); } }

/* ---------- Hero ---------- */
.hero {
  position: relative; isolation: isolate;
  min-height: 100svh; display: flex; align-items: center;
  padding: calc(var(--header-h) + 2.5rem) 0 5rem;
  border-bottom: 1px solid var(--line);
}
.hero-inner { position: relative; display: grid; gap: 2.5rem; align-items: center; }
.hero-copy { display: grid; gap: 1.5rem; justify-items: start; }

.eyebrow {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.9rem;
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase; color: var(--silver-3);
}
.eyebrow-brand { color: var(--silver-1); }
.eyebrow .dot { width: 4px; height: 4px; background: var(--silver-3); transform: rotate(45deg); }

.hero-actions { margin-top: 0.5rem; }
.hero .statement { margin-top: 0.75rem; }

.btn {
  display: inline-flex; align-items: center; gap: 0.7rem;
  padding: 0.95rem 1.6rem; min-height: 3rem;
  font: inherit; font-weight: 600; font-size: 0.95rem; letter-spacing: 0.02em; color: #0a0b0d;
  background: var(--silver-grad);
  border-radius: 999px; border: 0;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.4) inset, 0 10px 30px -10px rgba(200, 206, 216, 0.45);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), filter 0.25s;
}
.btn:hover { transform: translateY(-2px); filter: brightness(1.06); box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.5) inset, 0 16px 36px -10px rgba(210, 216, 226, 0.6); }
.btn .icon { width: 1.1rem; height: 1.1rem; stroke-width: 2; }

.hero-visual { display: grid; place-items: center; }
.logo-stage { position: relative; width: min(100%, 34rem); }
.logo-stage::before {
  content: ""; position: absolute; inset: 8% 6%; border-radius: 50%;
  background: radial-gradient(circle, rgba(205, 212, 224, 0.22), transparent 68%);
  filter: blur(40px);
}
.hero-logo {
  position: relative; width: 100%; height: auto;
  filter: drop-shadow(0 30px 40px rgba(0, 0, 0, 0.6));
  animation: logo-float 7s ease-in-out infinite alternate;
}

.scroll-cue {
  position: absolute; left: 50%; bottom: 1.75rem; translate: -50% 0;
  width: 1.5rem; height: 2.4rem; border: 1px solid var(--line-strong); border-radius: 999px;
  display: none;
}
.scroll-cue span { position: absolute; left: 50%; top: 0.45rem; width: 3px; height: 0.5rem; margin-left: -1.5px; border-radius: 2px; background: var(--silver-2); animation: cue 2s var(--ease) infinite; }
@keyframes cue { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(0.9rem); } }

@media (min-width: 60rem) {
  .hero-inner { grid-template-columns: 1.05fr 0.95fr; gap: 3rem; }
  .scroll-cue { display: block; }
}
@media (max-width: 59.99rem) {
  .hero { min-height: auto; padding-bottom: 4rem; }
  .hero-visual { order: -1; }
  .logo-stage { width: min(78%, 22rem); }
}

/* ---------- Cards (What we do) ---------- */
.cards { display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 40rem) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 70rem) { .cards { grid-template-columns: repeat(4, 1fr); } }

.card {
  position: relative; display: grid; gap: 0.9rem; align-content: start;
  padding: 1.75rem;
  background: linear-gradient(180deg, var(--surface-hi), var(--surface));
  border: 1px solid var(--line); border-radius: var(--radius);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.45), transparent); opacity: 0.5;
}
.card:hover { transform: translateY(-4px); border-color: var(--line-strong); box-shadow: 0 24px 50px -28px rgba(0, 0, 0, 0.9), 0 0 40px -20px rgba(200, 206, 216, 0.25); }
.card p { color: var(--muted); font-size: 0.97rem; }
.icon-wrap {
  display: grid; place-items: center; width: 3rem; height: 3rem; margin-bottom: 0.4rem;
  color: var(--silver-1); border: 1px solid var(--line-strong); border-radius: 0.85rem;
  background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.02));
}

/* ---------- Mission / Vision ---------- */
.mv { display: grid; gap: 1.25rem; }
@media (min-width: 52rem) { .mv { grid-template-columns: 1fr 1fr; gap: 1.75rem; } }
.mv-block {
  position: relative; padding: clamp(1.75rem, 4vw, 3rem);
  border: 1px solid var(--line); border-radius: calc(var(--radius) + 0.25rem);
  background:
    radial-gradient(120% 90% at 0% 0%, rgba(255, 255, 255, 0.07), transparent 55%),
    var(--surface);
}
.mv-block h2 { margin-bottom: 1.25rem; font-size: clamp(1.7rem, 1.2rem + 2vw, 2.4rem); }
.mv-block p:last-child { color: var(--muted); font-size: clamp(1.02rem, 1rem + 0.25vw, 1.15rem); }

/* ---------- Values ---------- */
.values { display: grid; gap: 0; border-top: 1px solid var(--line); }
.value {
  display: grid; grid-template-columns: auto 1fr; gap: 1.25rem 1.75rem; align-items: start;
  padding-block: clamp(1.4rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.3s;
}
.value .icon { width: 2rem; height: 2rem; margin-top: 0.15rem; color: var(--silver-2); stroke-width: 1.25; }
.value p { margin-top: 0.4rem; color: var(--muted); max-width: 36rem; }
.value h3 { font-size: clamp(1.15rem, 1.05rem + 0.5vw, 1.45rem); }
@media (min-width: 52rem) {
  .value { grid-template-columns: 2rem minmax(0, 20rem) 1fr; align-items: center; }
  .value > div { display: contents; }
  .value p { margin-top: 0; }
}

/* ---------- Closing ---------- */
.closing {
  position: relative; isolation: isolate; text-align: center; overflow: hidden;
  padding-block: clamp(5rem, 12vw, 9rem);
}
.closing .container { position: relative; display: grid; gap: 1.5rem; justify-items: center; }
.closing .lead { max-width: 32rem; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: #08090b; padding-top: clamp(3rem, 6vw, 4.5rem); }
.footer-inner { display: grid; gap: 2.5rem; padding-bottom: 3rem; }
.footer-brand { display: grid; gap: 0.5rem; justify-items: start; }
.footer-brand img { width: 11rem; height: auto; margin-bottom: 0.5rem; }
.footer-brand .tag { color: var(--silver-2); font-size: 0.8rem; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; }
.footer-brand .domain a { color: var(--muted); transition: color 0.2s; }
.footer-brand .domain a:hover { color: var(--silver-1); }
.footer-nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.75rem; }
.footer-nav a { color: var(--muted); font-size: 0.95rem; padding-block: 0.35rem; display: inline-block; transition: color 0.2s; }
.footer-nav a:hover { color: var(--silver-1); }
.footer-bottom { padding-block: 1.5rem 2rem; border-top: 1px solid var(--line); color: var(--silver-3); font-size: 0.85rem; }
@media (min-width: 52rem) {
  .footer-inner { grid-template-columns: 1fr auto; align-items: start; }
  .footer-nav { justify-content: flex-end; }
}

/* ---------- 404 ---------- */
.not-found { min-height: 100svh; display: grid; place-items: center; text-align: center; position: relative; isolation: isolate; padding: 2rem var(--gutter); overflow: hidden; }
.not-found .inner { position: relative; display: grid; gap: 1.5rem; justify-items: center; }
.not-found img { width: 7rem; height: auto; }
.not-found .code { font-size: clamp(4rem, 14vw, 8rem); font-weight: 700; letter-spacing: -0.04em; line-height: 1; }

/* ---------- Scroll reveal (only when JS is available) ---------- */
.js .reveal { opacity: 0; transform: translateY(1.25rem); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }
.js .reveal.d1 { transition-delay: 0.08s; }
.js .reveal.d2 { transition-delay: 0.16s; }
.js .reveal.d3 { transition-delay: 0.24s; }
.js .reveal.d4 { transition-delay: 0.32s; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition-duration: 0.01ms !important; transition-delay: 0s !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* ---------- Contact page ---------- */
.page-hero { position: relative; isolation: isolate; padding: calc(var(--header-h) + clamp(3rem, 8vw, 6rem)) 0 clamp(4rem, 9vw, 7rem); min-height: calc(100svh - 14rem); }
.page-hero .container { position: relative; display: grid; gap: 1.25rem; justify-items: start; }
.page-hero h1 { font-size: clamp(2.4rem, 1.5rem + 4vw, 4rem); }

.form-card {
  width: 100%; margin-top: 1.5rem; display: grid; gap: 1.25rem;
  padding: clamp(1.4rem, 4vw, 2.5rem);
  border: 1px solid var(--line); border-radius: calc(var(--radius) + 0.25rem);
  background: radial-gradient(120% 90% at 0% 0%, rgba(255, 255, 255, 0.06), transparent 55%), var(--surface);
}
.field-row { display: grid; gap: 1.25rem; }
@media (min-width: 40rem) { .field-row { grid-template-columns: 1fr 1fr; } }
.field { display: grid; gap: 0.5rem; }
.field label { font-size: 0.85rem; font-weight: 600; letter-spacing: 0.04em; color: var(--silver-2); }
.field input, .field textarea {
  width: 100%; padding: 0.85rem 1rem; font: inherit; font-size: 1rem; color: var(--text);
  background: rgba(0, 0, 0, 0.35); border: 1px solid var(--line-strong); border-radius: 0.75rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field textarea { resize: vertical; min-height: 9rem; }
.field input:hover, .field textarea:hover { border-color: rgba(255, 255, 255, 0.28); }
.field input:focus-visible, .field textarea:focus-visible { outline: 2px solid var(--silver-1); outline-offset: 2px; border-color: transparent; }
.field input:user-invalid, .field textarea:user-invalid { border-color: #e0848b; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.5rem; }
.btn:disabled { opacity: 0.6; cursor: progress; transform: none; }
.form-status { font-size: 0.95rem; color: var(--muted); }
.form-status:empty { display: none; }
.form-status.success { color: #8fd3a7; }
.form-status.error { color: #f0a1a7; }