/* ===================================================================
   Quilt Landing Page
   The spreadsheet is the runtime.
   =================================================================== */

:root {
  --bg: #0a0a0f;
  --bg-2: #11121a;
  --bg-3: #181a25;
  --fg: #f4f4f7;
  --fg-2: #b8b9c2;
  --fg-3: #7a7c8a;
  --accent: #7c5cff;
  --accent-2: #00d4aa;
  --accent-warm: #ff7a59;
  --border: rgba(255, 255, 255, 0.08);
  --border-2: rgba(255, 255, 255, 0.12);
  --grad-1: linear-gradient(135deg, #7c5cff 0%, #00d4aa 100%);
  --grad-2: linear-gradient(135deg, #ff7a59 0%, #7c5cff 100%);
  --grad-3: linear-gradient(135deg, #00d4aa 0%, #7c5cff 50%, #ff7a59 100%);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* Subtle grid background */
.grid-bg {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

a { color: inherit; text-decoration: none; }
code, pre { font-family: var(--font-mono); }

/* ===================================================================
   HEADER
   =================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
}

.logo-mark {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  background: var(--grad-1);
  border-radius: 6px;
  color: white;
  font-size: 14px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 14px;
  color: var(--fg-2);
}

.nav a:hover { color: var(--fg); }
.nav-cta {
  background: var(--fg);
  color: var(--bg) !important;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 600;
  transition: transform 0.1s ease;
}
.nav-cta:hover { transform: translateY(-1px); }

/* ===================================================================
   HERO
   =================================================================== */

.hero {
  padding: 120px 0 80px;
  text-align: center;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(124, 92, 255, 0.15) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--fg-2);
  margin-bottom: 32px;
}

.hero-eyebrow .dot {
  width: 6px;
  height: 6px;
  background: var(--accent-2);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-2);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-size: clamp(40px, 7vw, 88px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 32px;
}

.hero-title em {
  font-style: normal;
  background: var(--grad-1);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.grad {
  background: var(--grad-1);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: 19px;
  color: var(--fg-2);
  max-width: 720px;
  margin: 0 auto 48px;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 80px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  transition: all 0.15s ease;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--grad-1);
  color: white;
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.25);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(124, 92, 255, 0.35); }

.btn-ghost {
  background: var(--bg-2);
  color: var(--fg);
  border-color: var(--border-2);
}
.btn-ghost:hover { background: var(--bg-3); border-color: rgba(255,255,255,0.2); }

/* ===================================================================
   HERO DEMO — Animated grid
   =================================================================== */

.hero-demo {
  max-width: 720px;
  margin: 0 auto;
  perspective: 1000px;
}

.grid-card {
  background: var(--bg-2);
  border: 1px solid var(--border-2);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  transform: rotateX(2deg);
}

.grid-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  color: var(--fg-3);
  font-family: var(--font-mono);
}

.grid-card-title { color: var(--fg-2); }
.grid-card-status { color: var(--accent-2); }

.grid {
  display: grid;
  grid-template-columns: 100px repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: 8px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 13px;
}

.cell {
  background: var(--bg-3);
  padding: 12px 14px;
  text-align: center;
  transition: all 0.3s ease;
}

.cell.head {
  background: var(--bg-2);
  color: var(--fg-3);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.cell.label {
  background: var(--bg-2);
  color: var(--fg-2);
  text-align: left;
  font-weight: 500;
}

.cell.val { color: var(--fg); }
.cell.val.accent {
  color: var(--accent-2);
  font-weight: 600;
}

.cell.flash {
  background: rgba(124, 92, 255, 0.15);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.grid-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--fg-3);
  font-family: var(--font-mono);
}

.kbd {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 11px;
}

/* ===================================================================
   SECTIONS
   =================================================================== */

.section {
  padding: 120px 0;
  position: relative;
}

.section-eyebrow {
  display: inline-block;
  padding: 4px 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  color: var(--accent-2);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 24px;
}

.section-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 24px;
  max-width: 800px;
}

.section-sub {
  font-size: 18px;
  color: var(--fg-2);
  max-width: 700px;
  line-height: 1.6;
  margin-bottom: 64px;
}

/* ===================================================================
   PARADIGM SHIFTS
   =================================================================== */

.shift-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

.shift {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  padding: 20px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all 0.2s ease;
}
.shift:hover {
  border-color: var(--border-2);
  background: var(--bg-3);
}

.shift-old {
  color: var(--fg-3);
  text-decoration: line-through;
  text-decoration-color: var(--fg-3);
  font-size: 15px;
}

.shift-arrow {
  color: var(--accent);
  font-size: 18px;
  font-weight: 700;
}

.shift-new {
  color: var(--fg);
  font-weight: 600;
  font-size: 15px;
  background: var(--grad-1);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ===================================================================
   FEATURES
   =================================================================== */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}

.feature {
  padding: 28px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: all 0.2s ease;
}
.feature:hover {
  border-color: rgba(124, 92, 255, 0.4);
  background: var(--bg-3);
  transform: translateY(-2px);
}

.feature-icon {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: 10px;
  font-size: 18px;
  color: var(--accent);
  margin-bottom: 16px;
}

.feature h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.feature p {
  color: var(--fg-2);
  font-size: 14px;
  line-height: 1.6;
}

.feature code {
  font-size: 12px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--accent-2);
}

/* ===================================================================
   CODE
   =================================================================== */

.code-section {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.code-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: -1px;
  position: relative;
  z-index: 1;
}

.tab {
  padding: 10px 16px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  font-size: 13px;
  color: var(--fg-3);
  font-family: var(--font-mono);
  cursor: pointer;
}

.tab.active {
  background: var(--bg);
  color: var(--fg);
  border-color: var(--border-2);
}

.code-block {
  background: var(--bg);
  border: 1px solid var(--border-2);
  border-radius: 12px;
  padding: 32px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.7;
}

.code-block pre { white-space: pre; }

.code-block .c { color: var(--fg-3); font-style: italic; }
.code-block .k { color: var(--accent); }
.code-block .s { color: var(--accent-2); }

.code-cta {
  margin-top: 32px;
  text-align: center;
  color: var(--fg-2);
  font-size: 15px;
}

.code-cta code {
  background: var(--bg-3);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--accent-2);
}

/* ===================================================================
   INSTALL
   =================================================================== */

.install-steps {
  display: grid;
  gap: 20px;
  max-width: 720px;
}

.install-step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  align-items: start;
  padding: 24px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.step-num {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--grad-1);
  border-radius: 50%;
  font-weight: 800;
  color: white;
  font-size: 16px;
}

.step-content h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-content p {
  color: var(--fg-2);
  font-size: 14px;
  margin-top: 8px;
}

.code-inline {
  background: var(--bg);
  border: 1px solid var(--border-2);
  border-radius: 8px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-2);
}

.install-cta {
  margin-top: 40px;
  text-align: center;
}

/* ===================================================================
   DEMOS
   =================================================================== */

.demos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.demo-card {
  display: block;
  padding: 28px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: all 0.2s ease;
  color: var(--fg);
}
.demo-card:hover {
  border-color: rgba(0, 212, 170, 0.4);
  background: var(--bg-3);
  transform: translateY(-2px);
}

.demo-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.demo-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.demo-card p {
  color: var(--fg-2);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 16px;
}

.demo-link {
  color: var(--accent-2);
  font-size: 13px;
  font-weight: 600;
}

/* ===================================================================
   FINAL CTA
   =================================================================== */

.final-cta {
  text-align: center;
  padding: 120px 0;
}

.final-cta h2 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  background: var(--grad-1);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.final-cta p {
  font-size: 18px;
  color: var(--fg-2);
  margin-bottom: 40px;
}

/* ===================================================================
   FOOTER
   =================================================================== */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 60px 0 40px;
  background: var(--bg-2);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col p {
  color: var(--fg-2);
  font-size: 14px;
  margin-top: 12px;
  max-width: 320px;
}

.footer-col p.small {
  font-size: 12px;
  color: var(--fg-3);
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fg-3);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--fg-2);
  padding: 4px 0;
}
.footer-col a:hover { color: var(--fg); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--fg-3);
}

/* ===================================================================
   RESPONSIVE
   =================================================================== */

@media (max-width: 768px) {
  .hero { padding: 60px 0 40px; }
  .section { padding: 80px 0; }
  .nav { gap: 16px; font-size: 13px; }
  .nav a:not(.nav-cta) { display: none; }
  .grid { grid-template-columns: 80px repeat(4, 1fr); font-size: 11px; }
  .cell { padding: 8px 4px; }
  .footer-grid { grid-template-columns: 1fr; }
  .shift-grid { grid-template-columns: 1fr; }
  .shift { grid-template-columns: 1fr; }
  .shift-arrow { transform: rotate(90deg); justify-self: center; }
}