/* ===== RESET ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-0: #050507;
  --bg-1: #0a0a0f;
  --bg-2: #101018;
  --bg-3: #16161f;
  --bg-4: #1c1c28;
  --surface: rgba(255,255,255,0.03);
  --text-1: #f0f0f5;
  --text-2: #9595a8;
  --text-3: #5a5a6e;
  --accent: #d4a853;
  --accent-light: #e8c87a;
  --accent-dim: rgba(212,168,83,0.15);
  --accent-glow: rgba(212,168,83,0.06);
  --border: rgba(255,255,255,0.06);
  --border-hover: rgba(255,255,255,0.12);
  --border-accent: rgba(212,168,83,0.3);
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 100px;
  --font-display: 'Sora', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --max-w: 1120px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-body);
  font-weight: 400;
  background: var(--bg-0);
  color: var(--text-1);
  line-height: 1.65;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* Grain overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.022;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px;
}

/* ===== SCROLL ANIM ===== */
.reveal {
  opacity: 0;
  transform: translateY(44px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal.d1 { transition-delay: 0.1s; }
.reveal.d2 { transition-delay: 0.2s; }
.reveal.d3 { transition-delay: 0.3s; }
.reveal.d4 { transition-delay: 0.4s; }

/* ===== NAV ===== */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 14px 24px; }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max-w); margin: 0 auto;
  background: rgba(10,10,18,0.55);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 8px 8px 8px 24px;
}
.nav-logo {
  font-family: var(--font-display); font-weight: 600; font-size: 0.92rem;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.nav-right { display: flex; align-items: center; gap: 6px; }
.nav-back { font-size: 0.82rem; color: var(--text-2); padding: 8px 16px; border-radius: var(--radius-full); transition: color 0.25s; }
.nav-back:hover { color: var(--text-1); }
.nav-cta {
  font-family: var(--font-display); font-size: 0.76rem; font-weight: 600;
  letter-spacing: 0.04em; color: var(--bg-0); background: var(--text-1);
  padding: 9px 22px; border-radius: var(--radius-full);
  transition: background 0.3s var(--ease), transform 0.3s var(--ease);
}
.nav-cta:hover { background: var(--accent); transform: scale(1.04); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-display); font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: 14px 32px; border-radius: var(--radius-full);
  transition: all 0.35s var(--ease);
}
.btn-fill { color: var(--bg-0); background: var(--text-1); }
.btn-fill:hover { background: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 32px var(--accent-glow); }
.btn-ghost { color: var(--text-1); background: transparent; border: 1px solid var(--border-hover); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.btn-accent { color: var(--bg-0); background: linear-gradient(135deg, var(--accent), var(--accent-light)); }
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 8px 40px rgba(212,168,83,0.2); }

/* ===== HERO ===== */
.hero {
  min-height: 100vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center;
  padding: 160px 24px 100px; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -200px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 600px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.012) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.012) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black 20%, transparent 100%);
  pointer-events: none;
}
.hero-eyebrow { display: flex; flex-direction: column; align-items: center; gap: 16px; margin-bottom: 48px; position: relative; z-index: 1; }
.hero-eyebrow img { width: 180px; opacity: 0.3; }
.hero-taglines { font-size: 0.85rem; color: var(--text-3); line-height: 2; letter-spacing: 0.04em; }
.hero h1 {
  font-family: var(--font-display); font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 700; line-height: 1.08; letter-spacing: -0.03em;
  margin-bottom: 28px; max-width: 760px; position: relative; z-index: 1;
}
.hero h1 .glow {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-flow {
  display: flex; align-items: center; gap: 12px; font-size: 0.88rem;
  color: var(--text-2); margin-bottom: 24px; flex-wrap: wrap;
  justify-content: center; position: relative; z-index: 1;
}
.hero-flow .arr { color: var(--accent); font-size: 0.75rem; }
.hero-desc {
  font-size: 1rem; color: var(--text-2); max-width: 580px;
  line-height: 1.75; margin-bottom: 44px; position: relative; z-index: 1;
}

/* ===== STEP CARDS ===== */
.steps { padding: 20px 24px 120px; }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; max-width: var(--max-w); margin: 0 auto; }
.step-card {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 28px 24px 24px; display: flex; flex-direction: column; gap: 14px;
  transition: transform 0.4s var(--ease), border-color 0.4s, box-shadow 0.4s var(--ease);
  overflow: hidden; position: relative;
}
.step-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-dim), transparent);
  opacity: 0; transition: opacity 0.4s;
}
.step-card:hover { transform: translateY(-6px); border-color: var(--border-accent); box-shadow: 0 20px 56px rgba(0,0,0,0.4); }
.step-card:hover::before { opacity: 1; }
.step-card:nth-child(2) { background: var(--bg-3); }
.step-card:nth-child(3) { background: var(--bg-4); }
.sc-label { font-family: var(--font-display); font-size: 0.68rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.sc-title { font-family: var(--font-display); font-size: 1.12rem; font-weight: 600; line-height: 1.3; }
.sc-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.sc-tag { font-size: 0.7rem; color: var(--text-3); background: rgba(255,255,255,0.04); border: 1px solid var(--border); padding: 4px 12px; border-radius: var(--radius-full); }
.sc-img { margin-top: auto; border-radius: var(--radius-md); overflow: hidden; background: rgba(0,0,0,0.2); }
.sc-img img { width: 100%; transition: transform 0.6s var(--ease); }
.step-card:hover .sc-img img { transform: scale(1.04); }

/* ===== RESEARCH ===== */
.research { padding: 120px 24px; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .label {
  font-family: var(--font-display); font-size: 0.68rem; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent);
  margin-bottom: 16px; display: block;
}
.section-header h2 { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 700; line-height: 1.15; letter-spacing: -0.02em; }
.section-header h2 .dim { color: var(--text-3); }
.section-header p { color: var(--text-2); font-size: 1rem; margin-top: 12px; }
.research-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 12px; max-width: var(--max-w); margin: 0 auto; }
.r-card { background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 24px; transition: border-color 0.3s, transform 0.3s var(--ease); }
.r-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.r-card-title { font-family: var(--font-display); font-size: 0.86rem; font-weight: 600; margin-bottom: 8px; }
.r-card-body { font-size: 0.86rem; color: var(--text-2); line-height: 1.65; }

/* ===== USE CASES ===== */
.usecases { padding: 120px 24px; overflow: hidden; }
.uc-wrap {
  width: 100%;
  mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
}
.uc-track { display: flex; gap: 16px; animation: marquee 45s linear infinite; width: max-content; }
.uc-track:hover { animation-play-state: paused; }
@keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
.uc-card {
  flex-shrink: 0; width: 340px; background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px 24px; display: flex; flex-direction: column; gap: 14px;
  transition: border-color 0.3s;
}
.uc-card:hover { border-color: var(--border-hover); }
.uc-meta { display: flex; gap: 8px; }
.uc-meta span { font-size: 0.7rem; font-weight: 500; color: var(--text-3); background: rgba(255,255,255,0.04); border: 1px solid var(--border); padding: 3px 10px; border-radius: var(--radius-full); }
.uc-num { font-family: var(--font-display); font-size: 2.6rem; font-weight: 700; line-height: 1; background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.uc-card h3 { font-family: var(--font-display); font-size: 0.95rem; font-weight: 600; line-height: 1.35; }
.uc-card p { font-size: 0.84rem; color: var(--text-2); line-height: 1.65; }

/* ===== PRICING ===== */
.pricing { padding: 120px 24px; }
.pricing-toggle { display: flex; justify-content: center; margin: 0 auto 48px; background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius-full); padding: 4px; width: fit-content; }
.pricing-toggle button { font-family: var(--font-display); font-size: 0.76rem; font-weight: 600; letter-spacing: 0.04em; padding: 9px 28px; border-radius: var(--radius-full); color: var(--text-3); transition: all 0.3s var(--ease); }
.pricing-toggle button.active { background: var(--text-1); color: var(--bg-0); }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; max-width: var(--max-w); margin: 0 auto; }
.p-card {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 36px 28px; display: flex; flex-direction: column; gap: 20px;
  transition: border-color 0.3s, transform 0.3s var(--ease); position: relative;
}
.p-card:hover { border-color: var(--border-hover); transform: translateY(-4px); }
.p-card.featured { border-color: var(--border-accent); background: linear-gradient(180deg, rgba(212,168,83,0.04) 0%, var(--bg-2) 40%); }
.p-card.featured::before { content: ''; position: absolute; top: 0; left: 20%; right: 20%; height: 1px; background: linear-gradient(90deg, transparent, var(--accent), transparent); }
.p-name { font-family: var(--font-display); font-size: 0.86rem; font-weight: 600; color: var(--text-2); }
.p-price { font-family: var(--font-display); font-size: 2.2rem; font-weight: 700; letter-spacing: -0.02em; }
.p-price .unit { font-size: 0.85rem; font-weight: 400; color: var(--text-3); }
.p-desc { font-size: 0.86rem; color: var(--text-2); }
.p-card .btn { width: 100%; }
.p-features { list-style: none; display: flex; flex-direction: column; gap: 11px; }
.p-features li { font-size: 0.84rem; color: var(--text-2); padding-left: 22px; position: relative; line-height: 1.5; }
.p-features li::before { content: ''; position: absolute; left: 0; top: 7px; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

/* ===== FOOTER ===== */
.footer-cta { padding: 120px 24px 80px; text-align: center; position: relative; }
.footer-cta::before { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 700px; height: 400px; background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%); pointer-events: none; }
.footer-inner { max-width: 620px; margin: 0 auto; position: relative; z-index: 1; }
.footer-cta h2 { font-family: var(--font-display); font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 700; line-height: 1.1; letter-spacing: -0.03em; margin-bottom: 20px; }
.footer-cta .subtitle { font-size: 0.9rem; color: var(--text-2); line-height: 1.7; margin-bottom: 36px; text-transform: uppercase; letter-spacing: 0.03em; }
.footer-links { display: flex; justify-content: center; align-items: center; gap: 20px; margin-bottom: 48px; }
.footer-links .sep { width: 32px; height: 1px; background: var(--border-hover); }
.footer-bar { font-size: 0.72rem; color: var(--text-3); padding: 28px 24px; text-align: center; border-top: 1px solid var(--border); max-width: var(--max-w); margin: 0 auto; letter-spacing: 0.06em; }

/* ===== STEP DETAIL PAGES ===== */
.step-hero { padding: 160px 24px 60px; text-align: center; position: relative; }
.step-hero::before { content: ''; position: absolute; top: -100px; left: 50%; transform: translateX(-50%); width: 700px; height: 500px; background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%); pointer-events: none; }
.sh-label { display: inline-block; font-family: var(--font-display); font-size: 0.7rem; font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; position: relative; z-index: 1; }
.step-hero h1 { font-family: var(--font-display); font-size: clamp(2rem, 5vw, 3rem); font-weight: 700; line-height: 1.1; letter-spacing: -0.02em; margin-bottom: 20px; position: relative; z-index: 1; }
.sh-subtitle { font-size: 1rem; color: var(--text-2); max-width: 580px; margin: 0 auto 24px; line-height: 1.7; position: relative; z-index: 1; }
.sh-tags { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin-bottom: 44px; position: relative; z-index: 1; }
.sh-tag { font-size: 0.73rem; color: var(--text-3); background: rgba(255,255,255,0.04); border: 1px solid var(--border); padding: 6px 16px; border-radius: var(--radius-full); }
.sh-img { max-width: 460px; margin: 0 auto; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); position: relative; z-index: 1; }
.step-content { padding: 80px 24px; max-width: 700px; margin: 0 auto; }
.step-block { margin-bottom: 52px; }
.step-block h3 { font-family: var(--font-display); font-size: 1.2rem; font-weight: 600; margin-bottom: 16px; }
.step-block p { font-size: 0.94rem; color: var(--text-2); line-height: 1.8; margin-bottom: 12px; }
.step-block .hl { color: var(--text-1); font-weight: 500; }
.step-block .al { color: var(--accent); font-weight: 500; }
.next-steps { padding: 60px 24px 120px; }
.next-steps-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; max-width: 700px; margin: 0 auto; }

/* ===== RESPONSIVE ===== */
@media (max-width: 960px) {
  .steps-grid, .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
  .next-steps-grid { grid-template-columns: 1fr; max-width: 380px; margin: 0 auto; }
  .research-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .uc-card { width: 280px; }
}
@media (max-width: 600px) {
  .nav-inner { padding: 6px 6px 6px 16px; }
  .hero { padding: 130px 16px 70px; }
  .footer-links { flex-direction: column; gap: 16px; }
  .footer-links .sep { display: none; }
}