/* =================================================================
   SAIS.GE — Stylesheet
   Smart AI System LLC
   Theme: refined / luxury — deep navy + gold
   ================================================================= */

:root {
  --navy-900: #070d1f;
  --navy-800: #0a1228;
  --navy-700: #0f1a37;
  --navy-600: #16244a;
  --line:     #1e2c52;

  --gold:      #d4af6a;
  --gold-soft: #e7cd97;
  --gold-deep: #b8923f;

  --text:      #eaeefb;
  --text-mut:  #9aa6c6;
  --text-dim:  #6b769a;

  --radius:    16px;
  --radius-sm: 10px;
  --maxw:      1180px;

  --serif: 'Noto Serif Georgian', Georgia, serif;
  --sans:  'Noto Sans Georgian', system-ui, sans-serif;

  --ease: cubic-bezier(.22,.61,.36,1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--sans);
  background: var(--navy-800);
  color: var(--text);
  line-height: 1.65;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--serif); font-weight: 700; line-height: 1.18; letter-spacing: -.01em; }

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

.grad {
  background: linear-gradient(120deg, var(--gold-soft), var(--gold), var(--gold-deep));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 14px 28px; border-radius: 50px;
  font-family: var(--sans); font-size: 15px; font-weight: 500;
  cursor: pointer; border: 1px solid transparent;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s, color .25s;
}
.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-block { width: 100%; }
.btn-gold {
  background: linear-gradient(120deg, var(--gold), var(--gold-deep));
  color: #1a1304; font-weight: 600;
  box-shadow: 0 8px 24px rgba(212,175,106,.22);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(212,175,106,.36); }
.btn-ghost { border-color: var(--line); color: var(--text); background: rgba(255,255,255,.02); }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold-soft); transform: translateY(-2px); }

/* ---------- header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(7,13,31,.6); backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent; transition: border-color .3s, background .3s;
}
.site-header.scrolled { background: rgba(7,13,31,.92); border-bottom-color: var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { display: grid; place-items: center; filter: drop-shadow(0 0 8px rgba(212,175,106,.3)); }
.brand-text strong { display: block; font-family: var(--serif); font-size: 22px; letter-spacing: .12em; color: var(--gold-soft); line-height: 1; }
.brand-text small { display: block; font-size: 9px; letter-spacing: .28em; color: var(--text-dim); margin-top: 3px; }

.main-nav { display: flex; align-items: center; gap: 30px; }
.main-nav a { font-size: 15px; color: var(--text-mut); transition: color .2s; }
.main-nav a:not(.btn):hover { color: var(--gold-soft); }
.main-nav a:not(.btn) { position: relative; }
.main-nav a:not(.btn)::after {
  content: ''; position: absolute; left: 0; bottom: -6px; width: 0; height: 1.5px;
  background: var(--gold); transition: width .3s var(--ease);
}
.main-nav a:not(.btn):hover::after { width: 100%; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--gold-soft); transition: .3s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- hero ---------- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: 120px 0 80px; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(circle at 75% 35%, rgba(212,175,106,.16), transparent 45%),
    radial-gradient(circle at 15% 75%, rgba(22,36,74,.7), transparent 50%),
    linear-gradient(160deg, var(--navy-900), var(--navy-800) 60%, var(--navy-700));
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 60px 60px; opacity: .12;
  mask-image: radial-gradient(circle at 70% 50%, #000 10%, transparent 70%);
}
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; }

.eyebrow { display: inline-block; font-size: 12px; letter-spacing: .22em; text-transform: uppercase; color: var(--gold); margin-bottom: 22px; font-weight: 500; }
.hero h1 { font-size: clamp(44px, 7vw, 86px); font-weight: 800; margin-bottom: 24px; }
.hero .lead { font-size: clamp(17px, 2vw, 20px); color: var(--text-mut); max-width: 520px; margin-bottom: 34px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-quote { font-family: var(--serif); font-style: italic; font-size: 17px; color: var(--gold-soft); border-left: 2px solid var(--gold); padding-left: 18px; max-width: 440px; }

/* hero visual / orb */
.hero-visual { display: grid; place-items: center; }
.orb { position: relative; width: min(420px, 80vw); aspect-ratio: 1; display: grid; place-items: center; }
.orb-rings { position: absolute; inset: 0; width: 100%; height: 100%; }
.orb-rings circle { fill: none; stroke: var(--gold); stroke-width: .6; opacity: .4; transform-origin: center; }
.orb-rings circle:nth-child(1) { animation: spin 38s linear infinite; stroke-dasharray: 6 14; }
.orb-rings circle:nth-child(2) { animation: spin 26s linear infinite reverse; stroke-dasharray: 2 10; opacity: .55; }
.orb-rings circle:nth-child(3) { animation: spin 18s linear infinite; stroke-dasharray: 1 6; opacity: .7; }
.orb-emblem { position: relative; width: 46%; height: 46%; filter: drop-shadow(0 0 16px rgba(212,175,106,.55)); animation: float 6s ease-in-out infinite; }
.orb-core {
  position: absolute; width: 64%; height: 64%; border-radius: 50%;
  background: radial-gradient(circle, rgba(212,175,106,.28), rgba(212,175,106,.05) 55%, transparent 70%);
  animation: pulse 4s ease-in-out infinite;
}
@keyframes spin  { to { transform: rotate(360deg); } }
@keyframes float { 0%,100% { transform: translateY(-6px); } 50% { transform: translateY(6px); } }
@keyframes pulse { 0%,100% { transform: scale(1); opacity: .8; } 50% { transform: scale(1.08); opacity: 1; } }

.scroll-hint { position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 1; width: 24px; height: 38px; border: 1.5px solid var(--line); border-radius: 14px; display: grid; justify-items: center; padding-top: 7px; }
.scroll-hint span { width: 3px; height: 7px; background: var(--gold); border-radius: 2px; animation: scrolldot 1.8s infinite; }
@keyframes scrolldot { 0% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 80% { opacity: 0; transform: translateY(12px); } 100% { opacity: 0; } }

/* ---------- stats ---------- */
.stats { background: var(--navy-900); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 44px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat { text-align: center; }
.stat strong { display: block; font-family: var(--serif); font-size: clamp(34px, 4vw, 48px); color: var(--gold-soft); font-weight: 800; }
.stat span { font-size: 14px; color: var(--text-mut); }

/* ---------- sections ---------- */
.section { padding: 100px 0; }
.section-alt { background: var(--navy-900); }
.section-tag { display: inline-block; font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: var(--gold); margin-bottom: 16px; font-weight: 500; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 60px; }
.section h2 { font-size: clamp(30px, 4vw, 44px); }

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.about-grid h2 { font-size: clamp(28px, 3.5vw, 40px); }
.about-grid p { color: var(--text-mut); margin-bottom: 18px; font-size: 17px; }

/* ---------- cards ---------- */
.cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: linear-gradient(160deg, var(--navy-700), var(--navy-800));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 30px; transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.card:hover { transform: translateY(-6px); border-color: rgba(212,175,106,.4); box-shadow: 0 18px 40px rgba(0,0,0,.35); }
.card-icon { display: grid; place-items: center; width: 54px; height: 54px; border-radius: 14px; background: rgba(212,175,106,.1); color: var(--gold); margin-bottom: 22px; border: 1px solid rgba(212,175,106,.22); }
.card-icon svg { width: 26px; height: 26px; }
.card h3 { font-size: 20px; margin-bottom: 12px; }
.card p { color: var(--text-mut); font-size: 15px; }

/* ---------- projects ---------- */
.projects { grid-template-columns: repeat(3, 1fr); }
.project-card {
  position: relative; display: flex; flex-direction: column;
  background: linear-gradient(160deg, var(--navy-700), var(--navy-800));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; overflow: hidden;
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.project-card::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--gold), transparent); transform: scaleX(0); transform-origin: left; transition: transform .4s var(--ease);
}
.project-card:hover { transform: translateY(-6px); border-color: rgba(212,175,106,.4); box-shadow: 0 18px 40px rgba(0,0,0,.35); }
.project-card:hover::before { transform: scaleX(1); }
.project-top { margin-bottom: 18px; }
.project-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 4px rgba(212,175,106,.15); }
.project-card h3 { font-size: 21px; margin-bottom: 10px; letter-spacing: .01em; }
.project-card p { color: var(--text-mut); font-size: 15px; flex: 1; margin-bottom: 18px; }
.project-link { font-size: 14px; color: var(--gold); font-weight: 500; transition: gap .2s; }
.project-card:hover .project-link { color: var(--gold-soft); }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 56px; align-items: start; }
.contact-info h2 { font-size: clamp(28px, 3.5vw, 40px); margin-bottom: 18px; }
.contact-info > p { color: var(--text-mut); margin-bottom: 30px; font-size: 17px; }
.contact-list { list-style: none; display: grid; gap: 16px; }
.contact-list li { display: flex; flex-direction: column; gap: 2px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.contact-list span:first-child { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--text-dim); }
.contact-list a, .contact-list li > span:last-child { font-size: 17px; color: var(--text); }
.contact-list a:hover { color: var(--gold-soft); }

.contact-form-wrap { background: linear-gradient(160deg, var(--navy-700), var(--navy-800)); border: 1px solid var(--line); border-radius: var(--radius); padding: 36px; }
.field { margin-bottom: 18px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field label { display: block; font-size: 13px; color: var(--text-mut); margin-bottom: 7px; letter-spacing: .02em; }
.field input, .field textarea {
  width: 100%; background: var(--navy-900); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 13px 15px; color: var(--text);
  font-family: var(--sans); font-size: 15px; transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(212,175,106,.12); }
.field textarea { resize: vertical; min-height: 110px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-status { margin-top: 14px; font-size: 14px; text-align: center; min-height: 20px; }
.form-status.ok { color: #7fd99a; }
.form-status.err { color: #e88a8a; }

/* ---------- footer ---------- */
.site-footer { background: var(--navy-900); border-top: 1px solid var(--line); padding-top: 56px; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 30px; padding-bottom: 40px; }
.footer-brand strong { font-family: var(--serif); font-size: 24px; letter-spacing: .12em; color: var(--gold-soft); }
.footer-brand p { color: var(--text-mut); margin-top: 8px; max-width: 320px; font-size: 15px; }
.footer-nav { display: flex; gap: 26px; flex-wrap: wrap; align-items: center; }
.footer-nav a { color: var(--text-mut); font-size: 15px; transition: color .2s; }
.footer-nav a:hover { color: var(--gold-soft); }
.footer-bottom { border-top: 1px solid var(--line); padding: 22px 0; }
.footer-bottom span { color: var(--text-dim); font-size: 13px; }

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); transition-delay: var(--d, 0ms); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
  .orb-rings circle, .orb-emblem, .orb-core, .scroll-hint span { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-copy { order: 2; }
  .hero-visual { order: 1; }
  .orb { width: min(300px, 70vw); }
  .hero-cta, .hero-quote { justify-content: center; margin-left: auto; margin-right: auto; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 30px; }
  .cards-grid, .projects { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }

  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; top: 72px; right: 0; width: min(280px, 80vw); height: calc(100vh - 72px);
    flex-direction: column; align-items: flex-start; gap: 18px; padding: 30px 26px;
    background: var(--navy-900); border-left: 1px solid var(--line);
    transform: translateX(100%); transition: transform .35s var(--ease);
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav .btn { width: 100%; }
}
@media (max-width: 560px) {
  .cards-grid, .projects, .field-row { grid-template-columns: 1fr; }
  .section { padding: 70px 0; }
  .contact-form-wrap { padding: 26px 20px; }
}