/* Google Chrome Clone - Design System CSS */
/* Based on Material Design + Extracted Values */

/* ===== DESIGN TOKENS ===== */
:root {
  /* Typography */
  --font-primary: "Google Sans", arial, sans-serif;
  
  /* Colors */
  --color-text-primary: rgb(32, 33, 36);
  --color-text-body: rgb(0, 0, 0);
  --color-bg-white: rgb(255, 255, 255);
  --color-bg-gray: rgb(248, 249, 250);
  --color-bg-blue: rgb(66, 133, 244);      /* Google Blue */
  --color-bg-hero: rgb(235, 243, 254);     /* Light blue */
  --color-bg-mint: rgb(230, 244, 234);     /* Mint green */
  --color-green: rgb(52, 168, 83);         /* Google Green */
  
  /* Spacing (8dp grid) */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-7: 56px;
  --space-8: 64px;
  --space-10: 80px;
  --space-12: 96px;
  
  /* Layout */
  --container-max: 1220px;
  --container-padding: var(--space-2);
  
  /* Typography Scale */
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 32px;
  --text-4xl: 48px;
  --text-5xl: 60px;
}

/* ===== RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text-body);
  background: var(--color-bg-white);
  -webkit-font-smoothing: antialiased;
}

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

/* ===== CONTAINER ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ===== NAVBAR ===== */
.navbar {
  position: sticky;
  top: 0;
  background: var(--color-bg-white);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  z-index: 1000;
  padding: var(--space-2) 0;
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.navbar-logo {
  width: 24px;
  height: 24px;
}

.navbar-brand {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text-primary);
}

.navbar-nav {
  display: flex;
  gap: var(--space-3);
}

.nav-link {
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  text-decoration: none;
  font-weight: 400;
  transition: opacity 0.2s;
}

.nav-link:hover {
  opacity: 0.7;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 8px 20px;
  font-size: var(--text-base);
  font-weight: 500;
  border-radius: 24px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  font-family: var(--font-primary);
}

.btn-primary {
  background: var(--color-bg-blue);
  color: var(--color-bg-white);
}

.btn-primary:hover {
  background: rgb(51, 103, 214);
  box-shadow: 0 2px 8px rgba(66, 133, 244, 0.3);
}

.btn-white {
  background: var(--color-bg-white);
  color: var(--color-bg-blue);
}

.btn-white:hover {
  background: rgba(255, 255, 255, 0.9);
}

.btn-lg {
  padding: 12px 32px;
  font-size: 16px;
  font-weight: 600;
}

/* ===== SECTIONS ===== */
.section {
  padding: 64px 0;
}

.section-white {
  background: var(--color-bg-white);
}

.section-gray {
  background: var(--color-bg-gray);
}

.section-blue {
  background: var(--color-bg-blue);
  color: var(--color-bg-white);
}

.section-mint {
  background: var(--color-bg-mint);
}

.section-gradient {
  background: linear-gradient(135deg, #4285f4 0%, #1a73e8 100%);
  color: var(--color-bg-white);
}

.section-title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1px;
  color: var(--color-text-primary);
  text-align: center;
  margin-bottom: 32px;
}

.section-title-white {
  color: var(--color-bg-white);
}

.section-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-primary);
  text-align: center;
  margin-bottom: var(--space-6);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-footer-text {
  text-align: center;
  font-size: var(--text-lg);
  color: var(--color-text-primary);
  margin-top: var(--space-6);
}

/* ===== HERO SECTION ===== */
.hero {
  background: var(--color-bg-hero);
  padding: 80px 0 64px;
  border-radius: 0 0 32px 32px;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-content {
  padding-right: var(--space-4);
}

.hero-title {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.25px;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.hero-footnote {
  font-size: var(--text-sm);
  color: rgb(95, 99, 104);
  margin-top: var(--space-2);
}

.hero-img {
  width: 100%;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12), 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* ===== AI FEATURES GRID ===== */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 64px;
  margin-top: var(--space-6);
}

.ai-card {
  background: var(--color-bg-gray);
  padding: var(--space-4);
  border-radius: 16px;
  min-height: 200px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
}

.ai-card-large {
  grid-column: span 2;
}

.ai-card h3 {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.ai-card p {
  font-size: var(--text-base);
  color: rgb(95, 99, 104);
  margin-bottom: var(--space-3);
}

.ai-card-img {
  width: 100%;
  border-radius: 12px;
  margin-top: var(--space-3);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* ===== TWO COLUMN LAYOUT ===== */
.two-col-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  margin-top: var(--space-6);
}

.two-col-image img {
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.feature-item {
  margin-bottom: var(--space-6);
}

.feature-item h3 {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.feature-item p {
  font-size: var(--text-base);
  color: rgb(95, 99, 104);
  line-height: 1.6;
}

.feature-inline-img {
  margin-top: var(--space-2);
  border-radius: 12px;
  max-width: 400px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* ===== PROMO CARD ===== */
.promo-card {
  background: var(--color-bg-white);
  padding: var(--space-8);
  border-radius: 24px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.promo-card h2 {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.promo-card p {
  font-size: var(--text-lg);
  color: rgb(95, 99, 104);
  margin-bottom: var(--space-4);
}

.extension-icons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-4) 0;
}

.extension-icons img {
  width: 64px;
  height: 64px;
}

.ext-icon-large {
  width: 100px !important;
  height: 100px !important;
}

.link-cta {
  font-size: var(--text-lg);
  color: var(--color-bg-blue);
  text-decoration: none;
  font-weight: 500;
}

.link-cta:hover {
  text-decoration: underline;
}

/* ===== SECURITY GRID ===== */
.security-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.security-card {
  background: var(--color-bg-gray);
  padding: var(--space-5);
  border-radius: 16px;
  min-height: 250px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
}

.card-green {
  background: var(--color-bg-mint);
}

.security-card h3 {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.security-card p {
  font-size: var(--text-base);
  color: rgb(95, 99, 104);
  line-height: 1.6;
}

/* ===== SPEED SECTION ===== */
.speed-img {
  margin: var(--space-6) auto;
  max-width: 800px;
  border-radius: 16px;
}

/* ===== ECOSYSTEM GRID ===== */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.ecosystem-card {
  background: var(--color-bg-gray);
  padding: var(--space-5);
  border-radius: 16px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
}

.ecosystem-card-full {
  grid-column: span 2;
}

.ecosystem-card h3 {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.ecosystem-card p {
  font-size: var(--text-base);
  color: rgb(95, 99, 104);
}

/* ===== NEWS GRID ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.news-card {
  background: var(--color-bg-white);
  padding: var(--space-4);
  border-radius: 16px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
}

.news-img {
  width: 100%;
  border-radius: 12px;
  margin-bottom: var(--space-3);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.news-card h3 {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.news-card p {
  font-size: var(--text-base);
  color: rgb(95, 99, 104);
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: var(--space-6) auto 0;
}

.faq-item {
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  padding: var(--space-3) 0;
}

.faq-question {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  font-size: var(--text-2xl);
  font-weight: 300;
}

.faq-item[open] .faq-question::after {
  content: "−";
}

.faq-answer {
  padding: var(--space-2) 0;
  color: rgb(95, 99, 104);
  line-height: 1.6;
}

/* ===== BOTTOM CTA ===== */
.cta-subtitle {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.9);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-4);
}

.cta-footnote {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.8);
  text-align: center;
  margin-top: var(--space-2);
}

.qr-code {
  margin: var(--space-4) auto 0;
  width: 120px;
  height: 120px;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--color-bg-gray);
  padding: var(--space-8) 0 var(--space-4);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.footer-col h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: var(--space-1);
}

.footer-col a {
  font-size: var(--text-sm);
  color: rgb(95, 99, 104);
  text-decoration: none;
}

.footer-col a:hover {
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  padding-top: var(--space-3);
  text-align: center;
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: rgb(95, 99, 104);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero-container,
  .two-col-layout,
  .ai-grid,
  .security-grid,
  .ecosystem-grid,
  .news-grid,
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .ai-card-large,
  .ecosystem-card-full {
    grid-column: span 1;
  }
  
  .navbar-nav {
    display: none; /* Mobile menu would go here */
  }
  
  .section-title,
  .hero-title {
    font-size: var(--text-4xl);
  }
}