/* ========== CSS Variables & Reset ========== */
:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --primary-light: #e8f0fe;
  --accent-green: #34a853;
  --accent-red: #ea4335;
  --accent-yellow: #fbbc05;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --text-muted: #80868b;
  --bg-white: #ffffff;
  --bg-light: #f8f9fa;
  --bg-card: #ffffff;
  --border: #dadce0;
  --shadow-sm: 0 1px 2px rgba(60, 64, 67, 0.08);
  --shadow-md: 0 4px 12px rgba(60, 64, 67, 0.12);
  --shadow-lg: 0 8px 24px rgba(60, 64, 67, 0.16);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --max-width: 1200px;
  --nav-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
}

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

/* ========== Utility ========== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: var(--text-primary);
  line-height: 1.2;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.text-center {
  text-align: center;
}

.hidden {
  display: none !important;
}

/* ========== Spin Animation ========== */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

/* ========== Navigation ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: box-shadow 0.3s;
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--text-primary);
}

.nav-brand svg {
  width: 32px;
  height: 32px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-menu a {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.nav-menu a:hover {
  background: var(--bg-light);
  color: var(--text-primary);
}

.nav-menu a.active {
  background: var(--primary-light);
  color: var(--primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 8px rgba(26, 115, 232, 0.3);
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(26, 115, 232, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-outline:hover:not(:disabled) {
  background: var(--primary-light);
}

.btn-large {
  padding: 16px 36px;
  font-size: 1.0625rem;
  border-radius: var(--radius-md);
}

.btn-dark {
  background: var(--text-primary);
  color: white;
}

.btn-dark:hover:not(:disabled) {
  background: #000;
}

/* ========== Hero Section ========== */
.hero {
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 80px;
  background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
  position: relative;
  overflow: hidden;
}

.hero-decoration {
  position: absolute;
  top: -100px;
  right: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
  opacity: 0.6;
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  max-width: 560px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.hero-badge svg {
  width: 16px;
  height: 16px;
  color: var(--accent-green);
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.hero-title span {
  color: var(--primary);
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  gap: 24px;
  margin-top: 32px;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-meta-item svg {
  width: 16px;
  height: 16px;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-browser-mockup {
  width: 100%;
  max-width: 520px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}

.browser-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
}

.browser-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.browser-dot.red { background: var(--accent-red); }
.browser-dot.yellow { background: var(--accent-yellow); }
.browser-dot.green { background: var(--accent-green); }

.browser-address {
  flex: 1;
  height: 28px;
  background: white;
  border-radius: 100px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.browser-body {
  padding: 24px;
  min-height: 200px;
}

/* ========== Feature Cards ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: all 0.3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-icon.blue { background: var(--primary-light); color: var(--primary); }
.feature-icon.green { background: #e6f4ea; color: var(--accent-green); }
.feature-icon.red { background: #fce8e6; color: var(--accent-red); }
.feature-icon.yellow { background: #fef3e8; color: #e37400; }
.feature-icon.purple { background: #f3e8fd; color: #9334e6; }
.feature-icon.teal { background: #e6f7f5; color: #00796b; }

.feature-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== Platform Cards ========== */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.platform-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: all 0.3s;
}

.platform-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.platform-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.platform-icon svg {
  width: 40px;
  height: 40px;
}

.platform-name {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.platform-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.platform-card .btn {
  width: 100%;
  padding: 10px 16px;
  font-size: 0.875rem;
}

/* ========== Content Sections ========== */
.content-section {
  background: var(--bg-light);
}

.content-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.content-block:last-child {
  margin-bottom: 0;
}

.content-block.reverse {
  direction: rtl;
}

.content-block.reverse > * {
  direction: ltr;
}

.content-visual {
  background: white;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
}

.content-visual svg {
  width: 100%;
  height: auto;
}

.content-text h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.content-text p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.content-list {
  list-style: none;
  margin-top: 20px;
}

.content-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.content-list li svg {
  width: 20px;
  height: 20px;
  color: var(--accent-green);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ========== Reviews ========== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all 0.3s;
}

.review-card:hover {
  box-shadow: var(--shadow-md);
}

.review-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
}

.review-stars svg {
  width: 18px;
  height: 18px;
  color: var(--accent-yellow);
}

.review-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-green));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 0.875rem;
}

.review-name {
  font-weight: 600;
  font-size: 0.9375rem;
}

.review-role {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ========== Stats ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item {
  text-align: center;
  padding: 32px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: all 0.3s;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* ========== Comparison Table ========== */
.comparison-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  min-width: 600px;
}

.comparison-table th,
.comparison-table td {
  padding: 16px 20px;
  text-align: left;
  font-size: 0.9375rem;
}

.comparison-table thead th {
  background: var(--bg-light);
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border);
}

.comparison-table tbody tr {
  border-bottom: 1px solid var(--border);
}

.comparison-table tbody tr:last-child {
  border-bottom: none;
}

.comparison-table td {
  color: var(--text-secondary);
}

.comparison-table td:first-child {
  font-weight: 500;
  color: var(--text-primary);
}

.comparison-table .check {
  color: var(--accent-green);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.comparison-table .cross {
  color: var(--accent-red);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.comparison-table .partial {
  color: var(--accent-yellow);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all 0.3s;
}

.faq-item:hover {
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
}

.faq-question svg {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform 0.3s;
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.open .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ========== Download Page Specific ========== */
.download-hero {
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 60px;
  background: linear-gradient(135deg, var(--bg-light) 0%, #e8f0fe 100%);
  text-align: center;
}

.download-hero .container {
  max-width: 720px;
}

.download-hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.download-hero p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.download-main-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  text-align: center;
  max-width: 480px;
  margin: 0 auto 40px;
}

.download-main-card .platform-icon {
  margin: 0 auto 20px;
  width: 64px;
  height: 64px;
}

.download-main-card .platform-icon svg {
  width: 48px;
  height: 48px;
}

.download-main-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.download-meta {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.download-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.download-meta svg {
  width: 16px;
  height: 16px;
}

.download-section {
  background: var(--bg-light);
}

/* ========== Install Guide ========== */
.steps-list {
  max-width: 720px;
  margin: 0 auto;
}

.step-item {
  display: flex;
  gap: 20px;
  margin-bottom: 32px;
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 6px;
  margin-top: 2px;
}

.step-content p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== System Requirements ========== */
.requirements-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.requirement-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
}

.requirement-card h4 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.requirement-card h4 svg {
  width: 24px;
  height: 24px;
}

.requirement-card ul {
  list-style: none;
}

.requirement-card li {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}

.requirement-card li:last-child {
  border-bottom: none;
}

.requirement-card li span:first-child {
  color: var(--text-secondary);
}

.requirement-card li span:last-child {
  font-weight: 500;
  color: var(--text-primary);
}

/* ========== Changelog ========== */
.changelog-list {
  max-width: 800px;
  margin: 0 auto;
}

.changelog-item {
  display: flex;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.changelog-item:last-child {
  border-bottom: none;
}

.changelog-version {
  flex-shrink: 0;
  width: 80px;
}

.changelog-version .ver-num {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.changelog-version .ver-date {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.changelog-content h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.changelog-content ul {
  list-style: none;
  padding: 0;
}

.changelog-content li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.changelog-content li::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
  margin-top: 7px;
  flex-shrink: 0;
}

/* ========== CTA Section ========== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  text-align: center;
  padding: 80px 0;
}

.cta-section h2 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 1.125rem;
  opacity: 0.9;
  max-width: 560px;
  margin: 0 auto 32px;
}

.cta-section .btn {
  background: white;
  color: var(--primary);
}

.cta-section .btn:hover:not(:disabled) {
  background: var(--bg-light);
}

/* ========== SEO Page Specific ========== */
.seo-article {
  max-width: 800px;
  margin: 0 auto;
}

.seo-article h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
}

.seo-article h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 32px 0 12px;
  color: var(--primary);
}

.seo-article p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}

.seo-article ul, .seo-article ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.seo-article li {
  margin-bottom: 10px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.seo-article strong {
  color: var(--text-primary);
}

.seo-cta-box {
  background: linear-gradient(135deg, var(--primary-light) 0%, #e8f0fe 100%);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  margin: 40px 0;
  border: 1px solid var(--border);
}

.seo-cta-box h3 {
  margin-top: 0;
  color: var(--text-primary);
}

/* ========== Footer ========== */
.footer {
  background: var(--text-primary);
  color: #9aa0a6;
  padding: 48px 0 24px;
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: white;
  margin-bottom: 12px;
}

.footer-brand svg {
  width: 28px;
  height: 28px;
}

.footer-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: #9aa0a6;
}

.footer-column h4 {
  color: white;
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 16px;
}

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

.footer-column li {
  margin-bottom: 10px;
}

.footer-column a {
  color: #9aa0a6;
  font-size: 0.875rem;
  transition: color 0.2s;
}

.footer-column a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid #3c4043;
  padding-top: 24px;
  text-align: center;
  font-size: 0.8125rem;
}

.footer-bottom p {
  margin-bottom: 6px;
}

.footer-bottom .safe-note {
  color: var(--accent-green);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px;
}

.footer-bottom .safe-note svg {
  width: 16px;
  height: 16px;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content {
    max-width: 100%;
    order: 2;
  }
  .hero-visual {
    order: 1;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-meta {
    justify-content: center;
  }
  .content-block,
  .content-block.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }
  .content-block.reverse > * {
    direction: ltr;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s;
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-menu a {
    width: 100%;
    padding: 12px 16px;
  }
  .hero-title {
    font-size: 2rem;
  }
  .section-title {
    font-size: 1.75rem;
  }
  .features-grid,
  .platforms-grid,
  .stats-grid,
  .reviews-grid,
  .requirements-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .section-padding {
    padding: 60px 0;
  }
  .download-main-card {
    padding: 28px 20px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.625rem;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .btn-large {
    padding: 14px 24px;
    font-size: 1rem;
  }
}