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

:root {
  --bg: #FAFAF8;
  --bg2: #F4F1EC;
  --text: #1C1917;
  --text2: #78716C;
  --accent: #C2410C;
  --accent-hover: #9A3412;
  --border: #E7E5E0;
  --white: #FFFFFF;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'SF Mono', 'Fira Code', monospace;
  --max: 1100px;
  --radius: 10px;
}

html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; -webkit-font-smoothing: antialiased; }

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* NAV */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250,250,248,0.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}
.nav-inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.nav-logo {
  font-size: 1.1rem; font-weight: 700; letter-spacing: -0.02em;
  display: flex; align-items: center; gap: 8px;
}
.nav-logo-icon {
  width: 28px; height: 28px; background: var(--accent); border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 14px; font-weight: 800;
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { font-size: 0.9rem; color: var(--text2); transition: color 0.15s; }
.nav-links a:hover { color: var(--text); }
.nav-links .btn-nav {
  background: var(--text); color: var(--white);
  padding: 8px 18px; border-radius: 7px; font-size: 0.875rem; font-weight: 500;
  transition: background 0.15s;
}
.nav-links .btn-nav:hover { background: #333; }

/* HERO */
.hero {
  max-width: var(--max); margin: 0 auto;
  padding: 100px 24px 80px;
  text-align: center;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg2); border: 1px solid var(--border);
  padding: 5px 14px; border-radius: 100px;
  font-size: 0.8rem; color: var(--text2); margin-bottom: 28px;
}
.hero-eyebrow span { color: var(--accent); font-weight: 600; }
h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 800; letter-spacing: -0.035em; line-height: 1.12;
  max-width: 780px; margin: 0 auto 24px;
}
h1 em { font-style: normal; color: var(--accent); }
.hero-sub {
  font-size: 1.15rem; color: var(--text2); max-width: 560px;
  margin: 0 auto 44px; line-height: 1.7;
}
.hero-actions { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--radius); font-size: 0.95rem; font-weight: 600;
  cursor: pointer; border: none; transition: all 0.15s; text-decoration: none;
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-secondary {
  background: var(--white); color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-secondary:hover { border-color: #c0bbb5; transform: translateY(-1px); }
.btn-sm { padding: 10px 20px; font-size: 0.875rem; }

/* DEMO STRIP */
.demo-strip {
  background: var(--text); border-radius: 14px;
  max-width: 680px; margin: 60px auto 0;
  padding: 18px 24px;
  display: flex; align-items: center; gap: 12px;
}
.demo-strip .prompt-label { color: #9CA3AF; font-size: 0.8rem; font-family: var(--mono); white-space: nowrap; }
.demo-strip .prompt-text { color: #F9FAFB; font-size: 0.875rem; font-family: var(--mono); flex: 1; }
.demo-strip .prompt-badge {
  background: #16A34A; color: white; font-size: 0.72rem; font-weight: 600;
  padding: 3px 10px; border-radius: 100px; white-space: nowrap;
}

/* SECTIONS */
section { padding: 96px 24px; }
.section-inner { max-width: var(--max); margin: 0 auto; }
.section-label {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 14px;
}
h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800; letter-spacing: -0.03em; line-height: 1.2;
  margin-bottom: 18px;
}
.section-sub { font-size: 1.05rem; color: var(--text2); max-width: 520px; line-height: 1.7; }

/* HOW IT WORKS */
.steps {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2px; margin-top: 56px; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--border);
}
.step {
  background: var(--white); padding: 36px 32px;
  border-right: 1px solid var(--border);
}
.step:last-child { border-right: none; }
.step-num {
  width: 36px; height: 36px; background: var(--accent); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 700; font-size: 0.875rem; margin-bottom: 20px;
}
.step h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.step p { font-size: 0.9rem; color: var(--text2); line-height: 1.65; }

/* WHY SHELF */
.why-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px; margin-top: 56px;
}
.why-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 24px;
}
.why-icon { font-size: 1.6rem; margin-bottom: 14px; }
.why-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.why-card p { font-size: 0.875rem; color: var(--text2); line-height: 1.6; }

/* DOWNLOAD */
.download-section { background: var(--bg2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.download-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px; margin-top: 44px; max-width: 720px;
}
.dl-card {
  background: var(--white); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  display: flex; flex-direction: column; gap: 14px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.dl-card:hover { border-color: #c0bbb5; box-shadow: 0 4px 16px rgba(0,0,0,0.07); }
.dl-os { font-weight: 700; font-size: 1rem; display: flex; align-items: center; gap: 8px; }
.dl-os-icon { font-size: 1.4rem; }
.dl-note { font-size: 0.8rem; color: var(--text2); }
.dl-coming {
  font-size: 0.78rem; background: var(--bg2); color: var(--text2);
  border: 1px solid var(--border); padding: 5px 12px;
  border-radius: 100px; display: inline-block; width: fit-content;
}
.byok-note {
  margin-top: 32px; padding: 20px 24px;
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); max-width: 540px;
  display: flex; gap: 14px; align-items: flex-start;
}
.byok-note .icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }
.byok-note p { font-size: 0.875rem; color: var(--text2); line-height: 1.6; }
.byok-note strong { color: var(--text); }

/* USE CASE PAGE */
.uc-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px; margin-top: 56px;
}
.uc-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 28px;
}
.uc-card .uc-who {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 10px;
}
.uc-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.uc-card p { font-size: 0.875rem; color: var(--text2); line-height: 1.65; margin-bottom: 18px; }
.uc-examples { display: flex; flex-direction: column; gap: 8px; }
.uc-try-hint {
  font-size: 0.78rem; color: var(--text2); text-align: center;
  margin: -8px 0 24px; opacity: 0.6;
}
.uc-example {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 7px; padding: 10px 14px;
  font-size: 0.8rem; font-family: var(--mono); color: var(--text2);
  display: flex; align-items: center; gap: 8px;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
}
a.uc-example:hover { border-color: var(--accent); background: var(--bg); cursor: pointer; }
a.uc-example:hover .uc-try { opacity: 1; }
.uc-example::before { content: ">"; color: var(--accent); font-weight: 700; flex-shrink: 0; }
.uc-try {
  margin-left: auto; font-size: 0.7rem; color: var(--accent);
  opacity: 0; transition: opacity 0.15s; white-space: nowrap; flex-shrink: 0;
}

/* LEGAL PAGES */
.legal-page { max-width: 720px; margin: 0 auto; padding: 80px 24px 100px; }
.legal-page h1 { font-size: 2rem; margin-bottom: 8px; }
.legal-page .legal-date { color: var(--text2); font-size: 0.875rem; margin-bottom: 48px; }
.legal-page h2 { font-size: 1.15rem; font-weight: 700; margin: 36px 0 12px; }
.legal-page p, .legal-page li { font-size: 0.9375rem; color: var(--text2); line-height: 1.75; margin-bottom: 12px; }
.legal-page ul { padding-left: 20px; }
.legal-page a { color: var(--accent); text-decoration: underline; }

/* FOOTER */
footer {
  border-top: 1px solid var(--border); padding: 40px 24px;
  background: var(--bg);
}
.footer-inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 16px;
}
.footer-logo { font-weight: 700; font-size: 0.95rem; display: flex; align-items: center; gap: 8px; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { font-size: 0.85rem; color: var(--text2); transition: color 0.15s; }
.footer-links a:hover { color: var(--text); }
.footer-copy { font-size: 0.8rem; color: var(--text2); }

/* DIVIDER */
.divider { border: none; border-top: 1px solid var(--border); }

/* RESPONSIVE */
@media (max-width: 600px) {
  .nav-links { gap: 16px; }
  .nav-links a:not(.btn-nav) { display: none; }
  section { padding: 64px 20px; }
  .steps { grid-template-columns: 1fr; }
  .step { border-right: none; border-bottom: 1px solid var(--border); }
  .step:last-child { border-bottom: none; }
  .demo-strip { flex-direction: column; text-align: center; }
  .footer-inner { flex-direction: column; text-align: center; }
}