:root {
  --ink: #0F172A;
  --ink-2: #1E293B;
  --muted: #64748B;
  --bg: #F8FAFC;
  --surface: #FFFFFF;
  --card: #F1F5F9;
  --line: rgba(15, 23, 42, 0.08);
  --line-strong: rgba(15, 23, 42, 0.12);
  --blue: #3B82F6;
  --blue-deep: #1E3A8A;
  --glow: rgba(59, 130, 246, 0.4);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 24px 60px -20px rgba(15, 23, 42, 0.18), 0 8px 24px -12px rgba(15, 23, 42, 0.10);
  --shadow-glow: 0 20px 60px -15px var(--glow);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.011em;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }

/* ============ NAV ============ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 18px 0;
  background: rgba(248, 250, 252, 0.72);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: all 0.3s var(--ease);
}
.nav.scrolled {
  padding: 12px 0;
  border-bottom-color: var(--line);
  background: rgba(248, 250, 252, 0.85);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; letter-spacing: -0.02em; }
.logo-mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 100%);
  display: grid; place-items: center; color: white;
  box-shadow: 0 8px 20px -8px var(--glow), inset 0 1px 0 rgba(255,255,255,0.25);
}
.nav-links { display: flex; align-items: center; gap: 36px; }
.nav-links a {
  font-size: 14px; font-weight: 500; color: var(--muted);
  transition: color 0.2s var(--ease);
}
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: 999px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 100%);
  color: white; font-size: 14px; font-weight: 600;
  box-shadow: 0 8px 24px -8px var(--glow), inset 0 1px 0 rgba(255,255,255,0.22);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 14px 32px -10px var(--glow), inset 0 1px 0 rgba(255,255,255,0.28); }
.nav-signin {
  font-size: 14px; font-weight: 500; color: var(--muted);
  transition: color 0.2s var(--ease);
  margin-right: 4px;
}
.nav-signin:hover { color: var(--ink); }

@media (max-width: 720px) { .nav-links { display: none; } }

/* ============ HERO ============ */
.hero {
  position: relative;
  padding: 180px 0 120px;
  text-align: center;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(15,23,42,0.07) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 40%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 40%, transparent 75%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  top: 20%; left: 50%; transform: translateX(-50%);
  width: 680px; height: 680px; border-radius: 50%;
  background: radial-gradient(circle, rgba(59,130,246,0.18) 0%, transparent 60%);
  pointer-events: none;
  filter: blur(40px);
}
.hero-inner { position: relative; z-index: 2; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 13px; font-weight: 600; color: var(--ink-2);
  box-shadow: var(--shadow-sm);
  margin-bottom: 28px;
}
.eyebrow-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
}
.h1 {
  font-size: clamp(42px, 6.8vw, 72px);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.035em;
  max-width: 860px;
  margin: 0 auto 24px;
  background: linear-gradient(180deg, #0F172A 0%, #334155 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.lede {
  font-size: clamp(17px, 1.5vw, 20px);
  color: var(--muted);
  max-width: 580px;
  margin: 0 auto 40px;
  line-height: 1.55;
}
.cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px; border-radius: 999px;
  font-size: 15px; font-weight: 600;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 100%);
  color: white;
  box-shadow: 0 14px 30px -10px var(--glow), inset 0 1px 0 rgba(255,255,255,0.22);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 20px 40px -12px var(--glow), inset 0 1px 0 rgba(255,255,255,0.28); filter: brightness(1.05); }
.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--line-strong); }

/* ============ HERO MOCKUP ============ */
.hero-mockup-wrap {
  margin-top: 80px;
  position: relative;
  perspective: 2000px;
}
.hero-mockup-wrap::before {
  content: "";
  position: absolute;
  left: 50%; bottom: -60px; transform: translateX(-50%);
  width: 70%; height: 80px;
  background: radial-gradient(ellipse, rgba(59,130,246,0.35) 0%, transparent 70%);
  filter: blur(40px);
  z-index: 0;
}
.mockup {
  max-width: 920px;
  margin: 0 auto;
  background: #0B1120;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow:
    0 50px 120px -30px rgba(15, 23, 42, 0.35),
    0 24px 48px -12px rgba(15, 23, 42, 0.18),
    0 0 0 1px rgba(15, 23, 42, 0.04),
    inset 0 1px 0 rgba(255,255,255,0.06);
  transform: rotateX(8deg) scale(0.98);
  transform-origin: center 20%;
  overflow: hidden;
  position: relative;
  z-index: 1;
}
.mockup-titlebar {
  display: flex; align-items: center; gap: 8px;
  padding: 14px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.02);
}
.tl { width: 12px; height: 12px; border-radius: 50%; }
.tl-r { background: #FF5F57; }
.tl-y { background: #FEBC2E; }
.tl-g { background: #28C840; }
.mockup-title {
  flex: 1; text-align: center;
  font-size: 12px; color: rgba(255,255,255,0.4);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.mockup-body {
  padding: 28px 32px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 14px;
  line-height: 1.85;
  color: #E2E8F0;
  text-align: left;
}
.term-line { opacity: 0; animation: termFade 0.5s var(--ease) forwards; }
.term-line:nth-child(1) { animation-delay: 0.8s; }
.term-line:nth-child(2) { animation-delay: 1.1s; }
.term-line:nth-child(3) { animation-delay: 1.4s; }
.term-line:nth-child(4) { animation-delay: 1.7s; }
.term-line:nth-child(5) { animation-delay: 2.0s; }
.term-line:nth-child(6) { animation-delay: 2.3s; }
.term-line:nth-child(7) { animation-delay: 2.6s; }
@keyframes termFade { to { opacity: 1; } }
.prompt { color: #64748B; }
.cmd { color: #E2E8F0; }
.kw { color: #60A5FA; }
.str { color: #86EFAC; }
.ok { color: #4ADE80; }
.dim { color: #64748B; }

/* ============ SECTIONS ============ */
section { position: relative; }
.section { padding: 120px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 72px; }
.tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 13px; font-weight: 600; color: var(--ink-2);
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}
.h2 {
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.028em;
  margin-bottom: 16px;
}
.h2-sub {
  font-size: 17px;
  color: var(--muted);
  line-height: 1.6;
}

/* ============ SPLIT FEATURE ============ */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.split.reverse > :first-child { order: 2; }
.split-text .label {
  display: inline-block;
  font-size: 13px; font-weight: 600;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.split-text h3 {
  font-size: clamp(28px, 3.2vw, 38px);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 18px;
}
.split-text p {
  font-size: 17px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 32px;
}
.split-ctas { display: flex; gap: 10px; flex-wrap: wrap; }
.btn-sm { padding: 11px 20px; font-size: 14px; }

@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; gap: 48px; }
  .split.reverse > :first-child { order: initial; }
}

/* ============ UI CARDS ============ */
.ui-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
}
.ui-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 20px;
  pointer-events: none;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.6);
}
.ui-card-head {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.ui-card-title {
  font-size: 12px; font-weight: 600; color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.ui-card-icons { margin-left: auto; display: flex; gap: 6px; }
.ui-icon {
  width: 24px; height: 24px; border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--line);
  display: grid; place-items: center;
  color: var(--muted);
}
.code-body {
  padding: 24px 26px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink);
}
.code-body .c-muted { color: var(--muted); }
.code-body .c-blue { color: var(--blue); }
.code-body .c-green { color: #059669; }
.code-body .c-purple { color: #7C3AED; }

/* Flow card (MCP) */
.flow {
  padding: 28px;
}
.flow-row {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--ink-2);
  font-weight: 500;
}
.flow-row:last-child { margin-bottom: 0; }
.flow-num {
  width: 22px; height: 22px; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 100%);
  color: white;
  font-size: 11px; font-weight: 700;
  display: grid; place-items: center;
  box-shadow: 0 4px 10px -3px var(--glow);
}
.flow-row code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--blue);
  background: rgba(59,130,246,0.08);
  padding: 2px 7px;
  border-radius: 5px;
  font-size: 12.5px;
}

/* Vault card */
.vault {
  padding: 28px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.vault-item {
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  display: flex; align-items: center; gap: 12px;
  font-size: 13px;
}
.vault-icon {
  width: 28px; height: 28px; border-radius: 7px;
  background: var(--surface);
  border: 1px solid var(--line);
  display: grid; place-items: center;
  color: var(--blue);
  flex-shrink: 0;
}
.vault-name { font-weight: 600; color: var(--ink); }
.vault-meta { font-size: 11px; color: var(--muted); font-family: ui-monospace, Menlo, monospace; }

/* ============ FINAL CTA ============ */
.final-cta {
  margin: 40px 0 120px;
}
.final-cta-inner {
  position: relative;
  padding: 80px 48px;
  border-radius: 28px;
  background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 100%);
  text-align: center;
  overflow: hidden;
  box-shadow: 0 40px 80px -30px rgba(30, 58, 138, 0.4);
}
.final-cta-inner::before {
  content: "";
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 22px 22px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black, transparent 80%);
}
.final-cta-inner::after {
  content: "";
  position: absolute;
  top: -50%; left: 50%; transform: translateX(-50%);
  width: 800px; height: 800px; border-radius: 50%;
  background: radial-gradient(circle, rgba(59,130,246,0.25) 0%, transparent 55%);
  pointer-events: none;
}
.final-cta-inner > * { position: relative; z-index: 1; }
.final-cta h2 {
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: white;
  margin-bottom: 18px;
}
.final-cta p {
  font-size: 18px;
  color: rgba(255,255,255,0.68);
  max-width: 520px;
  margin: 0 auto 36px;
  line-height: 1.55;
}
.btn-white {
  background: white;
  color: var(--ink);
  box-shadow: 0 14px 30px -10px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.8);
}
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 20px 40px -12px rgba(0,0,0,0.35); }

/* ============ FOOTER ============ */
footer {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 24px;
}
.footer-links { display: flex; gap: 28px; }
.footer-links a { font-size: 14px; color: var(--muted); transition: color 0.2s var(--ease); }
.footer-links a:hover { color: var(--ink); }
.footer-copy { font-size: 13px; color: var(--muted); }

/* ============ REVEAL ANIMATION ============ */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal.delay-1 { transition-delay: 0.1s; }
.reveal.delay-2 { transition-delay: 0.2s; }
.reveal.delay-3 { transition-delay: 0.3s; }
.reveal.delay-4 { transition-delay: 0.4s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .term-line { opacity: 1; animation: none; }
}

/* ============ AUTH PAGES ============ */
.auth-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.auth-shell::before {
  content: "";
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(15,23,42,0.07) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 30%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}
.auth-shell::after {
  content: "";
  position: absolute;
  top: 8%; left: 50%; transform: translateX(-50%);
  width: 720px; height: 720px; border-radius: 50%;
  background: radial-gradient(circle, rgba(59,130,246,0.16) 0%, transparent 60%);
  pointer-events: none;
  filter: blur(50px);
  z-index: 0;
}
.auth-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 140px 24px 80px;
  position: relative;
  z-index: 1;
}
.auth-stack {
  width: 100%;
  max-width: 440px;
  text-align: center;
}
.auth-h1 {
  font-size: clamp(34px, 4.8vw, 46px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 14px;
  background: linear-gradient(180deg, #0F172A 0%, #334155 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.auth-sub {
  font-size: 16px;
  color: var(--muted);
  margin-bottom: 36px;
  line-height: 1.55;
}
.auth-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.auth-card::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: 22px;
  pointer-events: none;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.7);
}
.oauth-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 14px 20px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 600;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), filter 0.3s var(--ease);
  position: relative;
  z-index: 1;
}
.oauth-btn + .oauth-btn { margin-top: 12px; }
.oauth-btn svg { flex-shrink: 0; }
.oauth-github {
  background: #0F172A;
  color: white;
  box-shadow: 0 10px 24px -12px rgba(15,23,42,0.45), inset 0 1px 0 rgba(255,255,255,0.08);
}
.oauth-github:hover { transform: translateY(-1px); box-shadow: 0 16px 32px -14px rgba(15,23,42,0.55), inset 0 1px 0 rgba(255,255,255,0.12); filter: brightness(1.08); }
.oauth-google {
  background: white;
  color: var(--ink);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.oauth-google:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); border-color: var(--line-strong); }

.auth-fineprint {
  margin-top: 28px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.55;
}
.auth-fineprint a {
  color: var(--ink-2);
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease);
}
.auth-fineprint a:hover { border-bottom-color: var(--ink-2); }

.auth-switch {
  margin-top: 32px;
  font-size: 14px;
  color: var(--muted);
}
.auth-switch a {
  color: var(--blue);
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease);
}
.auth-switch a:hover { border-bottom-color: var(--blue); }