/* AutoAS Unified Master Theme — Luminous Hyper-Engineering (2026 Edition) */
@import url('https://fonts.googleapis.com/css2?family=Geist:wght@100..900&family=JetBrains+Mono:wght@100..900&family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200&display=swap');

:root {
  --surface: #faf8ff;
  --surface-dim: #d2d9f4;
  --surface-bright: #faf8ff;
  --surface-container-lowest: #ffffff;
  --surface-container-low: #f2f3ff;
  --surface-container: #eaedff;
  --surface-container-high: #e2e7ff;
  --surface-container-highest: #dae2fd;
  --on-surface: #131b2e;
  --on-surface-variant: #434655;
  --outline: #737686;
  --outline-variant: #c3c6d7;
  --primary: #004ac6;
  --primary-container: #2563eb;
  --on-primary: #ffffff;
  --secondary: #00687a;
  --secondary-container: #57dffe;
  --tertiary: #006242;
  --tertiary-container: #007d55;
  --tertiary-fixed: #6ffbbe;
  --line: #e2e7ff;
  --line-strong: #dae2fd;
  --text: #131b2e;
  --text-muted: #434655;
  --text-sub: #64748b;
  --accent: #2563eb;
  --font-sans: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  background: var(--surface);
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--surface);
  color: var(--on-surface);
  font-family: var(--font-sans);
  font-size: 14.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--primary-container);
  color: #fff;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

img {
  display: block;
  max-width: 100%;
}

.container {
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
}

/* Scroll progress meter */
.scroll-meter {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 100;
  background: linear-gradient(90deg, #2563eb, #06b6d4, #10b981);
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: left;
  pointer-events: none;
}

/* Header & Nav */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
}

.nav {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 750;
  color: var(--on-surface);
  letter-spacing: -0.02em;
}

.brand img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.brand-dot {
  color: var(--primary-container);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
  color: var(--text-muted);
}

.nav-links a:hover {
  color: var(--primary-container);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 12px;
  font-size: 13.5px;
  font-weight: 600;
  color: #fff;
  background: var(--primary-container);
  box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.35);
  transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
  cursor: pointer;
  border: 1px solid transparent;
}

.button:hover {
  background: var(--primary);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px 0 rgba(37, 99, 235, 0.45);
}

.button.secondary {
  color: var(--on-surface);
  background: var(--surface-container-lowest);
  border-color: var(--line);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.button.secondary:hover {
  color: var(--primary-container);
  border-color: var(--primary-container);
  background: var(--surface-container-low);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.12);
}

.button-small {
  padding: 6px 14px;
  font-size: 13px;
  border-radius: 9px;
}

/* Secondary Pages Layout */
.page-hero {
  position: relative;
  overflow: hidden;
  padding: 80px 0 50px;
  background: linear-gradient(180deg, #f0f4ff 0%, #faf8ff 100%);
  border-bottom: 1px solid var(--line);
}

.page-hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--surface-container-highest);
  color: var(--primary);
  font: 700 11px var(--font-mono);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.page-hero h1 {
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--on-surface);
  margin: 0 0 12px;
}

.page-hero p {
  max-width: 660px;
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}

.section {
  padding: 60px 0 80px;
}

.content {
  max-width: 860px;
  margin: 0 auto;
}

.content h2 {
  font-size: 24px;
  font-weight: 750;
  letter-spacing: -0.02em;
  margin: 40px 0 16px;
  color: var(--on-surface);
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}

.content h3 {
  font-size: 18px;
  font-weight: 650;
  margin: 24px 0 10px;
  color: var(--on-surface);
}

.content p, .content li {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.8;
}

.content code {
  color: var(--primary);
  background: var(--surface-container-highest);
  padding: 2px 6px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  background: rgba(16, 185, 129, 0.12);
  color: var(--tertiary);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.meta {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-container-lowest);
  box-shadow: 0 1px 4px rgba(0,0,0,0.03);
}

.cta {
  margin-top: 45px;
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(135deg, #ffffff 0%, #f2f6ff 100%);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.08);
}

.cta h2 {
  border: none;
  padding: 0;
  margin: 0 0 8px;
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}

.faq-grid details {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
  background: var(--surface-container-lowest);
  box-shadow: 0 1px 3px rgba(0,0,0,0.03);
  transition: all 0.2s;
}

.faq-grid details:hover, .faq-grid details[open] {
  border-color: rgba(37, 99, 235, 0.4);
  background: var(--surface-container-low);
}

.faq-grid summary {
  cursor: pointer;
  font-weight: 650;
  font-size: 14.5px;
  color: var(--on-surface);
  list-style: none;
}

.faq-grid details p {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-muted);
}

/* Site Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px 0 24px;
  background: var(--surface-container-low);
}

.copyright {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  font-size: 12px;
  color: var(--text-sub);
}

/* Toast */
.copy-toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translate(-50%, 20px) scale(0.95);
  padding: 10px 20px;
  border-radius: 999px;
  background: #0f172a;
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.1);
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
  z-index: 999;
}

.copy-toast.show {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
}

@media (max-width: 800px) {
  .nav-links { display: none; }
  .faq-grid { grid-template-columns: 1fr; }
  .copyright { flex-direction: column; align-items: flex-start; gap: 8px; }
}