/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --orange: #ff6700;
  --orange-hover: #e85d00;
  --orange-light: rgba(255, 103, 0, 0.08);
  --orange-glow: rgba(255, 103, 0, 0.15);
  --white: #ffffff;
  --gray-100: #f9f9f9;
  --gray-200: #f0f0f0;
  --gray-300: #dddddd;
  --gray-400: #dcdcdc;
  --gray-500: #999999;
  --gray-600: #666666;
  --gray-800: #333333;
  --gray-900: #1a1a1a;
  --black: #111111;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: "Space Grotesk", var(--font-body);
  --max-width: 1140px;
  --radius: 12px;
  --radius-sm: 8px;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.6;
  font-size: 16px;
}

a {
  text-decoration: none;
  color: inherit;
}

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

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

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gray-300);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo svg {
  height: 28px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-600);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--gray-900);
}

.nav-github {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--gray-900);
  color: var(--white) !important;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: background 0.2s;
}

.nav-github:hover {
  background: var(--black);
}

.nav-github svg {
  width: 18px;
  height: 18px;
}

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

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-900);
  margin: 5px 0;
  transition: 0.3s;
}

/* ===== Hero ===== */
.hero {
  padding: 160px 0 100px;
  text-align: center;
  background: linear-gradient(180deg, var(--white) 0%, var(--gray-100) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--orange-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-logo {
  width: 80px;
  height: 80px;
  margin: 0 auto 32px;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--orange-light);
  border: 1px solid rgba(255, 103, 0, 0.2);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--orange);
  margin-bottom: 24px;
}

.hero-badge svg {
  width: 14px;
  height: 14px;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 56px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--black);
  max-width: 720px;
  margin: 0 auto 20px;
}

.hero h1 span {
  color: var(--orange);
}

.hero-desc {
  font-size: 19px;
  color: var(--gray-600);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

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

.btn-primary:hover {
  background: var(--orange-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255, 103, 0, 0.3);
}

.btn-secondary {
  background: var(--white);
  color: var(--gray-900);
  border: 1px solid var(--gray-300);
}

.btn-secondary:hover {
  background: var(--gray-100);
  border-color: var(--gray-400);
}

.btn svg {
  width: 18px;
  height: 18px;
}

.hero-install {
  margin-top: 40px;
  display: flex;
  justify-content: center;
}

.install-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--gray-900);
  color: #e0e0e0;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 14px;
  position: relative;
}

.install-box .prompt {
  color: var(--orange);
  user-select: none;
}

.install-box code {
  color: #e0e0e0;
}

.install-copy {
  background: none;
  border: none;
  color: var(--gray-500);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  transition: color 0.2s;
}

.install-copy:hover {
  color: var(--white);
}

.install-copy svg {
  width: 16px;
  height: 16px;
}

/* ===== Stats ===== */
.stats {
  padding: 80px 0;
  background: var(--white);
  border-top: 1px solid var(--gray-300);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-card {
  text-align: center;
  padding: 32px 16px;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 700;
  color: var(--orange);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 15px;
  color: var(--gray-600);
  font-weight: 500;
}

/* ===== Inline Code ===== */
.feature-card code,
.cta code {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 0.85em;
  background: var(--orange-light);
  color: var(--orange);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ===== Section Titles ===== */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--orange);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 40px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--black);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 17px;
  color: var(--gray-600);
  max-width: 560px;
  line-height: 1.65;
}

/* ===== Features ===== */
.features {
  padding: 100px 0;
  background: var(--gray-100);
}

.features-header {
  text-align: center;
  margin-bottom: 64px;
}

.features-header .section-desc {
  margin: 0 auto;
}

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

.feature-card {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  padding: 32px;
  transition: all 0.25s;
}

.feature-card:hover {
  border-color: var(--gray-400);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  background: var(--orange-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
  color: var(--orange);
}

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--gray-900);
}

.feature-card p {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ===== How It Works ===== */
.how-it-works {
  padding: 100px 0;
  background: var(--white);
}

.how-header {
  text-align: center;
  margin-bottom: 64px;
}

.how-header .section-desc {
  margin: 0 auto;
}

.platforms {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 0;
}

.platform-card {
  background: var(--gray-100);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  padding: 32px;
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.platform-card.recommended {
  grid-column: 1 / -1;
  flex-direction: row;
  align-items: center;
  gap: 32px;
  border-color: var(--orange);
  background: var(--white);
}

.platform-card.recommended .platform-name {
  margin-bottom: 0;
  white-space: nowrap;
}

.platform-card.recommended .platform-code {
  flex: 1;
}

.platform-card.recommended::before {
  content: "Recommended";
  position: absolute;
  top: -11px;
  left: 24px;
  background: var(--orange);
  color: var(--white);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 4px;
}

.platform-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--gray-900);
}

.platform-code {
  background: var(--gray-900);
  border-radius: var(--radius-sm);
  padding: 16px;
  overflow-x: auto;
  flex: 1;
}

.platform-code code {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 13px;
  line-height: 1.7;
  color: #e0e0e0;
}

.platform-code .comment {
  color: #6b7280;
}

.platform-code .cmd {
  color: var(--orange);
}

/* ===== Commands ===== */
.commands {
  padding: 100px 0;
  background: var(--gray-100);
}

.commands-header {
  text-align: center;
  margin-bottom: 64px;
}

.commands-header .section-desc {
  margin: 0 auto;
}

.commands-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
}

.command-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s;
}

.command-item:hover {
  border-color: var(--gray-400);
}

.command-name {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 14px;
  font-weight: 600;
  color: var(--orange);
  white-space: nowrap;
  min-width: 140px;
}

.command-desc {
  font-size: 14px;
  color: var(--gray-600);
}

/* ===== Categories ===== */
.categories {
  padding: 100px 0;
  background: var(--white);
}

.categories-header {
  text-align: center;
  margin-bottom: 64px;
}

.categories-header .section-desc {
  margin: 0 auto;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.category-card {
  padding: 24px;
  background: var(--gray-100);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  text-align: center;
  transition: all 0.2s;
}

.category-card:hover {
  border-color: var(--orange);
  background: var(--orange-light);
}

.category-count {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  color: var(--orange);
  margin-bottom: 4px;
}

.category-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-800);
}

/* ===== CTA ===== */
.cta {
  padding: 100px 0;
  background: var(--gray-900);
  text-align: center;
}

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

.cta .section-desc {
  color: var(--gray-500);
  margin: 0 auto 40px;
}

.cta .btn-primary {
  padding: 16px 32px;
  font-size: 16px;
}

/* ===== Footer ===== */
.footer {
  padding: 40px 0;
  background: var(--black);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--gray-500);
  font-size: 14px;
}

.footer-left svg {
  height: 20px;
  width: auto;
  opacity: 0.5;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 14px;
  color: var(--gray-500);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--white);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 44px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .categories-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .commands-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--gray-300);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    padding: 120px 0 72px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero-desc {
    font-size: 17px;
  }

  .hero-logo {
    width: 64px;
    height: 64px;
  }

  .stats {
    padding: 56px 0;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat-number {
    font-size: 36px;
  }

  .section-title {
    font-size: 32px;
  }

  .features,
  .how-it-works,
  .commands,
  .categories,
  .cta {
    padding: 72px 0;
  }

  .features-grid,
  .platforms {
    grid-template-columns: 1fr;
  }

  .platform-card.recommended {
    flex-direction: column;
    gap: 16px;
  }

  .platform-card.recommended .platform-name {
    margin-bottom: 0;
  }

  .commands-grid {
    grid-template-columns: 1fr;
  }

  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .install-box {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 30px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .stat-card {
    padding: 20px 12px;
  }

  .stat-number {
    font-size: 30px;
  }

  .categories-grid {
    grid-template-columns: 1fr 1fr;
  }
}