:root {
  --color-bg: #1a3a2f;
  --color-bg-dark: #142a23;
  --color-surface: #f0fdf4;
  --color-surface-dark: #dcfce7;
  --color-text: #f0fdf4;
  --color-text-dark: #1a3a2f;
  --color-text-muted: #a7c4b8;
  --color-text-muted-dark: #4d7c62;
  --color-border: #2d5a47;
  --color-border-light: #bbf7d0;
  --color-primary: #4ade80;
  --color-primary-hover: #22c55e;
  --color-secondary: #86efac;
  --color-accent: #fbbf24;
  --radius: 8px;
  --max-width: 1100px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

/* Header & Nav */
header {
  position: sticky;
  top: 0;
  background: var(--color-bg-dark);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--color-primary);
  text-decoration: none;
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Main Content */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Hero */
.hero {
  text-align: center;
  padding: 4rem 0 2rem;
}

.hero h1 {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
}

.subtitle {
  font-size: 1.75rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.tagline {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-bg-dark);
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* App Preview */
.app-preview {
  padding: 2rem 0 1rem;
}

.preview-placeholder {
  display: flex;
  justify-content: center;
}

.screenshot-link {
  display: block;
  cursor: zoom-in;
  transition: transform 0.2s;
}

.screenshot-link:hover {
  transform: scale(1.02);
}

.app-screenshot {
  width: 100%;
  max-width: 900px;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
  margin-bottom: 1.5rem;
  image-rendering: high-quality;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  transform: translateZ(0);
}

/* API Key Callout */
.api-key-callout {
  text-align: center;
  padding: 3rem 2rem;
}

.api-key-callout p {
  font-size: 1.2rem;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Why Different Section */
.why-different {
  padding: 4rem 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.why-intro {
  margin-bottom: 3rem;
}

.why-intro p {
  font-size: 1.25rem;
  line-height: 1.8;
  color: var(--color-text);
  text-align: center;
}

.insight-blocks {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-bottom: 3rem;
}

.insight {
  border-left: 4px solid var(--color-primary);
  padding: 1.5rem 2rem;
  margin: 0;
  background: var(--color-bg-dark);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.insight p {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--color-text);
  margin: 0;
  font-style: italic;
}

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

.why-conclusion p {
  font-size: 1.4rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--color-text);
}

/* Features */
.features {
  padding: 4rem 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.features-split {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  align-items: start;
}

.features-intro h2 {
  font-size: 2rem;
  line-height: 1.3;
  color: var(--color-text);
  position: sticky;
  top: 6rem;
}

.features-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.feature-item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.feature-number {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: monospace;
  flex-shrink: 0;
  padding-top: 0.15rem;
}

.feature-content {
  color: var(--color-text);
  font-size: 1.05rem;
  line-height: 1.6;
}

.feature-content strong {
  color: var(--color-text);
}

.feature-sub {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.old-features h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(74, 222, 128, 0.2);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Hidden Gems Section */
.what-are-hidden-gems {
  padding: 4rem 0;
  background: var(--color-surface);
  margin: 0 -2rem;
  padding-left: 2rem;
  padding-right: 2rem;
  color: var(--color-text-dark);
}

.what-are-hidden-gems h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--color-bg-dark);
}

.what-are-hidden-gems p {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 1rem;
  color: var(--color-text-muted-dark);
}

.what-are-hidden-gems ul {
  max-width: 600px;
  margin: 0 auto 1.5rem;
  padding-left: 1.5rem;
}

.what-are-hidden-gems li {
  margin-bottom: 0.5rem;
  color: var(--color-text-muted-dark);
}

.what-are-hidden-gems .emphasis {
  font-weight: 600;
  color: var(--color-bg);
}

/* Download */
.download {
  padding: 4rem 0;
  text-align: center;
}

.download h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.download > p {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.download-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s;
}

.btn-download:hover {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: var(--color-bg-dark);
  box-shadow: 0 4px 12px rgba(74, 222, 128, 0.3);
}

.os-icon {
  font-size: 1.5rem;
}

.download-note {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.download-note a {
  color: var(--color-accent);
}

.download-note a:hover {
  color: var(--color-primary);
}

/* Requirements */
.requirements {
  padding: 2rem 0 4rem;
  text-align: center;
}

.requirements h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.requirements ul {
  list-style: none;
  color: var(--color-text-muted);
}

.requirements li {
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  background: var(--color-bg-dark);
  border-top: 1px solid var(--color-border);
  padding: 2rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

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

footer a:hover {
  color: var(--color-accent);
}

footer p {
  margin-bottom: 0.5rem;
}

/* Download Page */
.download-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 2rem;
  text-align: center;
}

.download-page h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.download-intro {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin-bottom: 3rem;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.download-note-centered {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.download-note-centered a {
  color: var(--color-primary);
  text-decoration: none;
}

.download-note-centered a:hover {
  color: var(--color-accent);
}

.download-card {
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  text-decoration: none;
  color: var(--color-text);
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.download-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 20px rgba(74, 222, 128, 0.2);
  transform: translateY(-2px);
}

.download-card .download-icon {
  font-size: 3rem;
}

.download-card h2 {
  font-size: 1.5rem;
  margin: 0;
}

.download-card .download-details {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 0;
}

.download-card .download-version {
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  background: rgba(74, 222, 128, 0.1);
  border-radius: var(--radius);
  margin-top: 0.25rem;
}

.download-card .download-version:empty {
  display: none;
}

.download-card .download-action {
  background: var(--color-primary);
  color: var(--color-bg-dark);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

.download-version-label {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.download-version-label .download-version {
  color: var(--color-primary);
  font-weight: 600;
}

.download-version-label .download-version:empty::after {
  content: "Loading...";
  color: var(--color-text-muted);
  font-weight: 400;
}

.download-notes {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

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

.download-notes a:hover {
  color: var(--color-accent);
}

.download-notes p {
  margin-bottom: 0.5rem;
}

/* Linux Download Matrix */
.linux-matrix {
  max-width: 700px;
  margin: 0 auto 3rem;
}

.linux-matrix table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-bg-dark);
  border-radius: var(--radius);
  overflow: hidden;
}

.linux-matrix th,
.linux-matrix td {
  padding: 1rem;
  text-align: center;
  border: 1px solid var(--color-border);
}

.linux-matrix th {
  background: var(--color-border);
  font-weight: 600;
  color: var(--color-text);
}

.linux-matrix .format-label {
  text-align: left;
  background: var(--color-border);
}

.linux-matrix .format-label strong {
  display: block;
  color: var(--color-text);
  font-size: 1rem;
}

.linux-matrix .format-label span {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.matrix-download {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-bg-dark);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  transition: all 0.2s;
}

.matrix-download:hover {
  background: var(--color-primary-hover);
}

/* CTA Section */
.cta-section {
  padding: 4rem 2rem;
  text-align: center;
}

.cta-section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.cta-section p {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
}

/* API Keys Page */
.api-keys-page {
  max-width: 800px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.api-keys-page h1 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
}

.api-section {
  margin-bottom: 2.5rem;
}

.api-section h2 {
  font-size: 1.4rem;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.api-section p {
  color: var(--color-text);
  margin-bottom: 0.75rem;
  line-height: 1.7;
}

.api-section ul {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.api-section li {
  color: var(--color-text);
  margin-bottom: 0.75rem;
  line-height: 1.7;
}

.api-links {
  list-style: none;
  padding-left: 0;
}

.api-links li {
  margin-bottom: 0.5rem;
}

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

.api-section a:hover {
  color: var(--color-accent);
}

.api-note {
  margin-left: 1.5rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.api-back {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

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

.api-back a:hover {
  color: var(--color-accent);
}

/* About Page */
.about-page {
  max-width: 800px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.about-page h1 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
}

.about-section {
  margin-bottom: 2.5rem;
}

.about-section h2 {
  font-size: 1.4rem;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.about-section p {
  color: var(--color-text);
  margin-bottom: 0.75rem;
  line-height: 1.7;
}

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

.about-section a:hover {
  color: var(--color-accent);
}

.about-back {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

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

.about-back a:hover {
  color: var(--color-accent);
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  cursor: zoom-out;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 95%;
  max-height: 95%;
  border-radius: 8px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  left: 1.5rem;
  background: var(--color-bg-dark);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  z-index: 1001;
}

.lightbox-close:hover {
  background: var(--color-primary);
  color: var(--color-bg-dark);
  border-color: var(--color-primary);
}

/* Responsive */
@media (max-width: 768px) {
  nav {
    padding: 1rem;
  }

  .nav-links {
    gap: 1rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .tagline {
    font-size: 1.1rem;
  }

  .features-split {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .features-intro h2 {
    position: static;
    text-align: center;
  }

  .why-different {
    padding: 3rem 1rem;
  }

  .insight {
    padding: 1rem 1.25rem;
  }
}