/* ==========================================================================
   Torvia AI — AI-native audit platform, technical SaaS system
   ========================================================================== */

:root {
  --bg: #FAFAF8;
  --bg-alt: #F1F1EE;
  --ink: #12131A;
  --ink-soft: #55565F;
  --line: #E1E1DC;
  --violet: #7C5CFC;
  --coral: #FF7A59;
  --teal: #2FD9C4;
  --accent: #7C5CFC;
  --accent-soft: rgba(124, 92, 252, 0.12);
  --accent-ink: #ffffff;
  --dark-bg: #12131A;
  --dark-card: #1B1C26;
  --dark-ink: #FAFAF8;
  --dark-soft: #B3B4BE;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --max: 1440px;
  --gutter: clamp(20px, 5vw, 64px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { overflow-x: hidden; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
section[id] { scroll-margin-top: 96px; }
@media (max-width: 720px) { section[id] { scroll-margin-top: 80px; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { margin: 0; text-wrap: balance; font-weight: 800; letter-spacing: -0.01em; }
p { margin: 0; text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; background: none; border: none; cursor: pointer; color: inherit; }

.section-inner { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
em { font-style: normal; background: linear-gradient(90deg, var(--violet), var(--coral)); -webkit-background-clip: text; background-clip: text; color: transparent; }

.skip-link {
  position: absolute; top: -60px; left: 16px;
  background: var(--ink); color: var(--bg);
  padding: 12px 20px; border-radius: var(--radius-sm);
  z-index: 1000; transition: top 200ms var(--ease);
}
.skip-link:focus { top: 16px; }
:focus-visible { outline: 2px solid var(--violet); outline-offset: 3px; }

.eyebrow {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-soft); margin: 0 0 20px;
}
.eyebrow-dot { width: 7px; height: 7px; margin-top: 5px; border-radius: 50%; background: linear-gradient(135deg, var(--violet), var(--coral)); flex-shrink: 0; }
.eyebrow-light { color: var(--dark-soft); }

.h2 { font-size: clamp(30px, 4vw, 48px); line-height: 1.12; max-width: 20ch; }
.h2-light { color: var(--dark-ink); }
.h3 { font-size: 19px; font-weight: 700; line-height: 1.3; margin-bottom: 8px; }
.body-lg { font-size: clamp(16px, 1.3vw, 18px); color: var(--ink-soft); max-width: 56ch; margin-top: 20px; font-weight: 400; }
.body-light { color: var(--dark-soft); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 26px; border-radius: 999px; font-weight: 700; font-size: 14px;
  white-space: nowrap; min-height: 48px; text-decoration: none;
  transition: transform 150ms var(--ease), background-color 200ms var(--ease), color 200ms var(--ease), border-color 200ms var(--ease), box-shadow 200ms var(--ease), filter 200ms var(--ease);
}
.btn:active { transform: scale(0.97); }
.btn span[aria-hidden="true"] { display: inline-block; transition: transform 200ms var(--ease); }
.btn:hover span[aria-hidden="true"] { transform: translateX(3px); }
.btn-accent-pill { background: linear-gradient(120deg, var(--violet), var(--coral)); background-color: var(--violet); color: #fff; border: none; box-shadow: 0 8px 24px rgba(124,92,252,0.35); }
.btn-accent-pill:hover { filter: brightness(1.08); box-shadow: 0 10px 28px rgba(124,92,252,0.45); }
.btn-outline-light { background: transparent; color: var(--dark-ink); border: 1px solid rgba(250,250,248,0.5); }
.btn-outline-light:hover { border-color: var(--teal); color: var(--teal); background: rgba(255,255,255,0.06); }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background-color 300ms var(--ease), border-color 300ms var(--ease), backdrop-filter 300ms var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--line);
}
.header-inner {
  max-width: var(--max); margin: 0 auto; padding: 20px var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; font-size: 17px; letter-spacing: 0.06em; color: var(--dark-ink); transition: color 300ms var(--ease); flex-shrink: 0; }
.site-header.is-scrolled .brand { color: var(--ink); }
.brand-mark { display: block; }
.main-nav ul { display: flex; gap: 36px; }
.main-nav a {
  position: relative; text-decoration: none; font-size: 14px; font-weight: 600; color: var(--dark-soft);
  transition: color 200ms var(--ease);
}
.main-nav a::after {
  content: ""; position: absolute; left: 0; bottom: -4px; width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--coral)); border-radius: 2px;
  transform: scaleX(0); transform-origin: left; transition: transform 250ms var(--ease);
}
.main-nav a:hover::after { transform: scaleX(1); }
.site-header.is-scrolled .main-nav a { color: var(--ink-soft); }
.main-nav a:hover { color: var(--violet); }
.header-actions { display: flex; align-items: center; }

.nav-toggle { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 48px; height: 48px; align-items: center; }
.nav-toggle span { width: 22px; height: 2px; background: var(--dark-ink); transition: transform 250ms var(--ease), opacity 200ms var(--ease), background-color 300ms var(--ease); }
.site-header.is-scrolled .nav-toggle span { background: var(--ink); }
.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); }

.mobile-nav { display: none; border-top: 1px solid var(--line); background: var(--bg); }
.mobile-nav.is-open { display: flex; flex-direction: column; }
.mobile-nav ul { padding: 12px var(--gutter) 24px; display: flex; flex-direction: column; gap: 4px; }
.mobile-nav a { display: block; text-decoration: none; color: var(--ink); padding: 12px 0; font-size: 16px; font-weight: 600; border-bottom: 1px solid var(--line); }
.mobile-nav .btn { margin-top: 12px; justify-content: center; width: 100%; border-bottom: none; }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { position: relative; min-height: 100svh; display: flex; flex-direction: column; justify-content: flex-end; overflow: hidden; padding-bottom: 90px; }
.hero-media { position: absolute; inset: 0; z-index: 0; }
.hero-media picture { display: block; width: 100%; height: 100%; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: 60% 30%; }
@media (max-width: 720px) { .hero-media img { object-position: 50% 8%; } }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(18,19,26,0.78) 0%, rgba(18,19,26,0.62) 35%, rgba(18,19,26,0.85) 78%, rgba(18,19,26,0.97) 100%);
}
.hero-content { position: relative; z-index: 1; max-width: var(--max); margin: 0 auto; padding: 160px var(--gutter) 0; width: 100%; animation: heroRise 900ms var(--ease) both; }
@keyframes heroRise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) { .hero-content { animation: none; } }
.hero-h1 { font-size: clamp(34px, 5.6vw, 68px); line-height: 1.08; color: var(--dark-ink); max-width: 18ch; }
.hero-line { white-space: nowrap; }
@media (max-width: 720px) { .hero-line { white-space: normal; } }
.hero-sub { font-size: clamp(16px, 1.4vw, 19px); color: var(--dark-soft); max-width: 50ch; margin-top: 24px; }
.hero-ctas { display: flex; gap: 16px; margin-top: 36px; flex-wrap: wrap; }

.hero-card {
  position: absolute; z-index: 2; right: var(--gutter); bottom: 60px;
  width: min(380px, 42vw); background: rgba(250,250,248,0.98); color: var(--ink);
  border-radius: var(--radius-lg); padding: 22px 22px 18px; box-shadow: 0 30px 60px rgba(0,0,0,0.35);
  animation: heroRise 900ms 200ms var(--ease) both;
}
@media (prefers-reduced-motion: reduce) { .hero-card { animation: none; } }
.hero-card-head { display: flex; align-items: center; gap: 8px; font-size: 11px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); }
.hero-card-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); position: relative; }
.hero-card-dot::after {
  content: ""; position: absolute; inset: 0; border-radius: 50%; background: var(--teal);
  animation: livePulse 2s var(--ease) infinite;
}
@keyframes livePulse {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(2.6); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) { .hero-card-dot::after { animation: none; display: none; } }
.hero-card-query { font-size: 14px; font-weight: 600; margin-top: 14px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.hero-card-steps { margin-top: 14px; display: flex; flex-direction: column; gap: 12px; }
.hero-card-steps li { display: flex; gap: 10px; align-items: flex-start; }
.hero-card-num {
  flex-shrink: 0; width: 26px; height: 26px; line-height: 26px; text-align: center; border-radius: 50%;
  font-size: 13px; font-weight: 700; color: #fff !important; background: linear-gradient(135deg, var(--violet), var(--coral));
  box-shadow: 0 2px 6px rgba(124,92,252,0.4); margin-top: 1px;
}
.hero-card-steps strong { display: block; font-size: 14px; }
.hero-card-desc { display: block; font-size: 12px; color: var(--ink-soft); margin-top: 3px; }

@media (max-width: 900px) {
  .hero-card { position: static; width: calc(100% - (var(--gutter) * 2)); margin: 32px var(--gutter) 0; }
  .hero { padding-bottom: 32px; }
}

/* ==========================================================================
   Two-pathway split
   ========================================================================== */
.paths { padding: 120px 0; background: var(--bg); }
.path-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 48px; }
.path-card {
  display: block; text-decoration: none; color: var(--ink);
  background: var(--bg-alt); border-radius: var(--radius-lg); padding: 40px 32px;
  transition: transform 300ms var(--ease), box-shadow 300ms var(--ease);
}
.path-card:hover { transform: translateY(-4px); box-shadow: 0 24px 48px rgba(18,19,26,0.1); }
.path-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px; border-radius: var(--radius-md); background: var(--accent-soft); color: var(--violet);
  margin-bottom: 24px;
}
.path-icon svg { width: 26px; height: 26px; }
.path-card p { color: var(--ink-soft); margin-top: 10px; }
.path-link { display: inline-flex; gap: 8px; margin-top: 24px; font-weight: 700; color: var(--violet); transition: gap 200ms var(--ease); }
.path-card:hover .path-link { gap: 12px; }

/* ==========================================================================
   Problem
   ========================================================================== */
.problem { padding: 0 0 120px; background: var(--bg); }
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.problem-card {
  background: var(--bg-alt); border-radius: var(--radius-lg); padding: 32px 28px;
  transition: transform 300ms var(--ease), box-shadow 300ms var(--ease);
}
.problem-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(18,19,26,0.08); }
.problem-num { display: block; font-size: 13px; color: var(--coral); margin-bottom: 20px; font-weight: 700; }
.problem-card p { color: var(--ink-soft); margin-top: 6px; }

/* ==========================================================================
   Platform capabilities — dark section
   ========================================================================== */
.platform { padding: 120px 0; background: var(--dark-bg); }
.platform-lede { margin-bottom: 56px; }
.platform-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.platform-card {
  background: var(--dark-card); border: 1px solid rgba(250,250,248,0.08); border-radius: var(--radius-lg);
  padding: 32px 28px; transition: transform 300ms var(--ease), border-color 300ms var(--ease);
}
.platform-card:hover { transform: translateY(-4px); border-color: var(--violet); }
.platform-card .h3 { color: var(--dark-ink); }
.platform-card p { color: var(--dark-soft); font-size: 15px; }
.platform-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: var(--radius-md); background: rgba(124,92,252,0.16); color: var(--teal);
  margin-bottom: 20px;
}
.platform-icon svg { width: 22px; height: 22px; }

/* ==========================================================================
   Results
   ========================================================================== */
.results { padding: 120px 0; background: var(--bg); }
.metric-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 48px; }
.metric-card {
  background: var(--bg-alt); border-radius: var(--radius-lg); padding: 32px 24px;
  transition: transform 300ms var(--ease), box-shadow 300ms var(--ease);
}
.metric-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(18,19,26,0.08); }
.metric-title { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-soft); margin: 0 0 14px; }
.metric-num { font-size: clamp(28px, 3.2vw, 38px); font-weight: 800; display: block; line-height: 1.1; background: linear-gradient(90deg, var(--violet), var(--coral)); -webkit-background-clip: text; background-clip: text; color: transparent; white-space: nowrap; }
.metric-suffix { -webkit-text-fill-color: initial; background: none; color: var(--ink); }
.metric-num-compact { font-size: clamp(22px, 2.4vw, 28px); }
.metric-arrow { -webkit-text-fill-color: initial; background: none; color: var(--ink); font-weight: 600; }
.metric-card p { margin-top: 14px; color: var(--ink-soft); font-size: 14px; }

/* ==========================================================================
   Deep-dive sections
   ========================================================================== */
.deep-dive { padding: 120px 0; background: var(--bg); }
.deep-dive-alt { background: var(--bg-alt); }
.deep-dive-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.deep-dive-grid-rev .deep-dive-media { order: 2; }
.deep-dive-media img { border-radius: var(--radius-lg); object-fit: cover; width: 100%; height: auto; aspect-ratio: 4/3; }
.check-list { margin-top: 32px; display: flex; flex-direction: column; gap: 16px; }
.check-list li { position: relative; padding-left: 32px; color: var(--ink-soft); font-weight: 500; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 2px; width: 20px; height: 20px; border-radius: 50%;
  background: linear-gradient(135deg, var(--violet), var(--teal));
}
.check-list li::after {
  content: ""; position: absolute; left: 6px; top: 8px; width: 8px; height: 4px;
  border-left: 2px solid #fff; border-bottom: 2px solid #fff; transform: rotate(-45deg);
}

/* ==========================================================================
   How it works
   ========================================================================== */
.how-it-works { padding: 120px 0; background: var(--bg); }
.hww-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 56px; align-items: stretch; }
.hww-media { width: 100%; height: 100%; }
.hww-media img { border-radius: var(--radius-lg); object-fit: cover; width: 100%; height: 100%; display: block; }
@media (max-width: 1024px) { .hww-media img { height: auto; aspect-ratio: 4/3; } }
.steps { margin-top: 48px; display: flex; flex-direction: column; gap: 14px; }
.step {
  display: grid; grid-template-columns: 52px 1fr; gap: 20px; align-items: start;
  padding: 26px 24px; background: var(--bg-alt); border-radius: var(--radius-md);
  transition: transform 250ms var(--ease);
}
.step:hover { transform: translateX(4px); }
.step-num { font-weight: 800; color: var(--violet); font-size: 16px; }
.step p { margin-top: 6px; color: var(--ink-soft); }

/* ==========================================================================
   Trust strip
   ========================================================================== */
.trust-strip { padding: 64px 0; background: var(--dark-bg); border-top: 1px solid rgba(250,250,248,0.08); border-bottom: 1px solid rgba(250,250,248,0.08); text-align: center; }
.trust-strip-label { font-size: 11px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--dark-soft); }
.trust-strip-list { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; margin-top: 20px; }
.trust-strip-list li { font-size: 15px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--dark-ink); opacity: 0.8; }
.trust-strip-note { margin-top: 24px; font-size: 13px; color: var(--dark-soft); }

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq { padding: 120px 0; background: var(--bg); }
.faq-list { margin-top: 48px; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--bg-alt); border-radius: var(--radius-md); overflow: hidden; }
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 20px;
  padding: 22px 24px; text-align: left; font-size: clamp(16px, 1.8vw, 18px); font-weight: 700; min-height: 48px;
}
.faq-icon { flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%; background: var(--ink); position: relative; transition: background-color 250ms var(--ease); }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; background: var(--bg); transition: transform 250ms var(--ease); }
.faq-icon::before { width: 12px; height: 2px; top: 13px; left: 8px; }
.faq-icon::after { width: 2px; height: 12px; top: 8px; left: 13px; }
.faq-question[aria-expanded="true"] .faq-icon { background: var(--violet); }
.faq-question[aria-expanded="true"] .faq-icon::after { transform: rotate(90deg); }
.faq-answer { padding: 0 24px 24px; max-width: 68ch; }
.faq-answer p { color: var(--ink-soft); }

/* ==========================================================================
   Final CTA
   ========================================================================== */
.final-cta { padding: 0 0 120px; background: var(--bg); }
.final-cta-card {
  background: var(--dark-bg); border-radius: var(--radius-lg); padding: 80px var(--gutter);
  text-align: center; display: flex; flex-direction: column; align-items: center;
}
.final-cta-card .eyebrow { justify-content: center; }
.final-cta-card .h2 { max-width: 22ch; }
.final-cta-card .body-lg { max-width: 46ch; }
.final-cta-card .hero-ctas { justify-content: center; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { padding: 72px 0 40px; background: var(--dark-bg); color: var(--dark-soft); }
.footer-inner { display: flex; flex-direction: column; gap: 40px; }
.footer-top { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.footer-brand { display: flex; flex-direction: column; gap: 14px; max-width: 420px; }
.footer-word { color: var(--dark-ink); font-size: 18px; font-weight: 800; letter-spacing: 0.06em; }
.footer-tagline { color: var(--dark-soft); font-size: 14px; }
.footer-nav { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }
.footer-nav a { text-decoration: none; font-size: 14px; font-weight: 600; color: var(--dark-soft); }
.footer-nav a:hover { color: var(--teal); }
.footer-contact, .footer-copy { font-size: 13px; color: var(--dark-soft); border-top: 1px solid rgba(250,250,248,0.1); padding-top: 20px; }
.footer-copy { border-top: none; padding-top: 0; opacity: 0.6; }
.footer-contact a { text-decoration: underline; }

/* ==========================================================================
   Scroll reveal
   ========================================================================== */
.pre-reveal { opacity: 0; transform: translateY(24px); transition: opacity 700ms var(--ease), transform 700ms var(--ease); }
.pre-reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { .pre-reveal { opacity: 1; transform: none; transition: none; } }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .main-nav { display: none; }
  .header-actions { display: none; }
  .nav-toggle { display: flex; }
  .metric-cards { grid-template-columns: repeat(2, 1fr); }
  .problem-grid, .platform-cards { grid-template-columns: repeat(2, 1fr); }
  .path-cards { grid-template-columns: 1fr; }
  .deep-dive-grid, .hww-grid { grid-template-columns: 1fr; }
  .deep-dive-grid-rev .deep-dive-media { order: 0; }
  .hww-media { height: auto; }
  .hww-media img { position: static; height: auto; }
}

@media (max-width: 720px) {
  .header-inner { padding: 16px var(--gutter); }
  .hero-content { padding: 120px var(--gutter) 0; }
  .hero-overlay {
    background: linear-gradient(180deg, rgba(18,19,26,0.55) 0%, rgba(18,19,26,0.5) 18%, rgba(18,19,26,0.82) 42%, rgba(18,19,26,0.95) 65%, rgba(18,19,26,0.99) 100%);
  }
  .btn { width: 100%; justify-content: center; }
  .hero-ctas, .final-cta-card .hero-ctas { flex-direction: column; }
  .paths, .problem, .platform, .results, .deep-dive, .how-it-works, .faq, .final-cta { padding-top: 80px; }
  .problem { padding-bottom: 80px; }
  .platform { padding-bottom: 80px; }
  .faq { padding-bottom: 80px; }
  .final-cta { padding-bottom: 80px; }
  .metric-cards, .problem-grid, .platform-cards { grid-template-columns: 1fr; }
  .final-cta-card { padding: 56px 24px; }
  .footer-top { flex-direction: column; gap: 28px; }
  .trust-strip-list { gap: 20px; }
}