/* Kairo Website Styles
   Dark theme matching the application
   Colors from tailwind.config.js */

:root {
  /* Dark theme colors */
  --dark-50: #f8fafc;
  --dark-100: #f1f5f9;
  --dark-200: #e2e8f0;
  --dark-300: #cbd5e1;
  --dark-400: #94a3b8;
  --dark-500: #64748b;
  --dark-600: #475569;
  --dark-700: #334155;
  --dark-800: #1e293b;
  --dark-850: #172033;
  --dark-900: #0f172a;
  --dark-950: #020617;

  /* Accent colors */
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-success: #22c55e;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  --accent-info: #3b82f6;

  /* Spacing */
  --container-max: 1200px;
  --section-padding: 5rem;
}

/* Reset and base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--dark-900);
  color: var(--dark-200);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.2s;
}

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

h1, h2, h3, h4, h5, h6 {
  color: var(--dark-100);
  line-height: 1.3;
  font-weight: 600;
}

h1 { font-size: 3rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.125rem; }

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
}

code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  background-color: var(--dark-800);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.875em;
  color: var(--accent-primary);
}

pre {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  background-color: var(--dark-850);
  padding: 1.5rem;
  border-radius: 8px;
  overflow-x: auto;
  border: 1px solid var(--dark-700);
}

pre code {
  background: none;
  padding: 0;
  color: var(--dark-200);
}

ul {
  list-style: none;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--dark-800);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--dark-100);
}

.nav-logo:hover {
  color: var(--dark-100);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
  color: white;
}

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

.nav-links a {
  color: var(--dark-300);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--dark-100);
}

@media (max-width: 640px) {
  .nav-links {
    gap: 1rem;
  }
  .nav-links a {
    font-size: 0.875rem;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.9375rem;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  color: white;
}

.btn-secondary {
  background-color: var(--dark-800);
  color: var(--dark-200);
  border: 1px solid var(--dark-700);
}

.btn-secondary:hover {
  background-color: var(--dark-700);
  color: var(--dark-100);
}

/* Hero Section */
.hero {
  padding-top: 160px;
  padding-bottom: var(--section-padding);
  text-align: center;
  background: radial-gradient(ellipse at top, var(--dark-850) 0%, var(--dark-900) 70%);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--dark-100), var(--dark-300));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.25rem;
  }
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--dark-400);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

.hero-platforms {
  font-size: 0.875rem;
  color: var(--dark-500);
}

/* Features Overview */
.features-overview {
  padding: var(--section-padding) 0;
  background-color: var(--dark-900);
}

.features-overview h2 {
  text-align: center;
  margin-bottom: 3rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background-color: var(--dark-850);
  border: 1px solid var(--dark-800);
  border-radius: 12px;
  padding: 2rem;
  transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
  border-color: var(--dark-700);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: var(--dark-400);
  font-size: 0.9375rem;
}

/* Technical Section */
.technical {
  padding: var(--section-padding) 0;
  background-color: var(--dark-850);
}

.technical h2 {
  text-align: center;
  margin-bottom: 3rem;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

@media (max-width: 1024px) {
  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .tech-grid {
    grid-template-columns: 1fr;
  }
}

.tech-item h4 {
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
}

.tech-item p {
  color: var(--dark-400);
  font-size: 0.9375rem;
}

/* Security Section */
.security-focused {
  padding: var(--section-padding) 0;
  background-color: var(--dark-900);
}

.security-content {
  max-width: 800px;
  margin: 0 auto;
}

.security-content h2 {
  margin-bottom: 1.5rem;
}

.security-content > p {
  color: var(--dark-400);
  margin-bottom: 2rem;
  font-size: 1.0625rem;
}

.security-list {
  display: grid;
  gap: 1rem;
}

.security-list li {
  position: relative;
  padding-left: 1.75rem;
  color: var(--dark-300);
}

.security-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-success);
  font-weight: 600;
}

/* CTA Section */
.cta {
  padding: var(--section-padding) 0;
  background: linear-gradient(180deg, var(--dark-850) 0%, var(--dark-900) 100%);
  text-align: center;
}

.cta h2 {
  margin-bottom: 1rem;
}

.cta > .container > p {
  color: var(--dark-400);
  margin-bottom: 2rem;
}

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

/* Footer */
.footer {
  padding: 2rem 0;
  background-color: var(--dark-950);
  border-top: 1px solid var(--dark-800);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--dark-400);
  font-weight: 500;
}

.footer-brand .logo-icon {
  width: 24px;
  height: 24px;
  font-size: 0.75rem;
}

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

.footer-links a {
  color: var(--dark-500);
  font-size: 0.875rem;
}

.footer-links a:hover {
  color: var(--dark-300);
}

/* Features Page */
.features-page .page-header,
.download-page .page-header {
  padding-top: 140px;
  padding-bottom: 3rem;
  text-align: center;
  background: radial-gradient(ellipse at top, var(--dark-850) 0%, var(--dark-900) 70%);
}

.page-header p {
  color: var(--dark-400);
  font-size: 1.125rem;
  margin-top: 1rem;
}

.feature-section {
  padding: 4rem 0;
  background-color: var(--dark-900);
}

.feature-section.alt {
  background-color: var(--dark-850);
}

.feature-detail-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.feature-detail-icon {
  font-size: 2rem;
}

.feature-detail-content > p {
  color: var(--dark-400);
  font-size: 1.0625rem;
  margin-bottom: 2rem;
  max-width: 800px;
}

.feature-detail-content h4 {
  color: var(--dark-200);
  margin-top: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--dark-700);
}

.feature-detail-content ul {
  display: grid;
  gap: 0.5rem;
  max-width: 800px;
}

.feature-detail-content li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--dark-300);
}

.feature-detail-content li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent-primary);
}

/* Download Page */
.download-page .downloads {
  padding: 3rem 0;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

@media (max-width: 1024px) {
  .download-grid {
    grid-template-columns: 1fr;
  }
}

.download-card {
  background-color: var(--dark-850);
  border: 1px solid var(--dark-800);
  border-radius: 12px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
}

.download-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--dark-700);
}

.platform-icon {
  font-size: 2rem;
}

.download-options {
  flex: 1;
  display: grid;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.download-option h4 {
  color: var(--dark-200);
  margin-bottom: 0.25rem;
}

.download-option p {
  color: var(--dark-500);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.download-option code {
  display: block;
  font-size: 0.75rem;
  padding: 0.5rem;
  background-color: var(--dark-800);
  border-radius: 4px;
  color: var(--dark-300);
  overflow-x: auto;
}

.download-note {
  font-size: 0.875rem;
  color: var(--dark-500);
  margin-bottom: 1.5rem;
}

.download-btn {
  width: 100%;
  margin-top: auto;
}

/* Build from Source */
.build-source {
  padding: 4rem 0;
  background-color: var(--dark-850);
}

.build-source h2 {
  margin-bottom: 1rem;
}

.build-source > .container > p {
  color: var(--dark-400);
  margin-bottom: 2rem;
}

.code-block {
  margin-bottom: 2rem;
}

.requirements-list {
  margin-bottom: 2rem;
}

.requirements-list li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--dark-300);
  margin-bottom: 0.5rem;
}

.requirements-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent-primary);
}

/* Releases */
.releases {
  padding: 4rem 0;
  background-color: var(--dark-900);
  text-align: center;
}

.releases h2 {
  margin-bottom: 1rem;
}

.releases p {
  color: var(--dark-400);
  margin-bottom: 2rem;
}

/* Features Accordion */
.features-accordion {
  padding: 2rem 0 4rem;
  background-color: var(--dark-900);
}

.feature-accordion-item {
  background-color: var(--dark-850);
  border: 1px solid var(--dark-800);
  border-radius: 12px;
  margin-bottom: 1rem;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.feature-accordion-item:hover {
  border-color: var(--dark-700);
}

.feature-accordion-item[open] {
  border-color: var(--dark-700);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Hide default marker in all browsers */
.feature-accordion-item > summary {
  list-style: none;
}

.feature-accordion-item > summary::-webkit-details-marker {
  display: none;
}

.feature-accordion-item > summary::marker {
  display: none;
  content: "";
}

.feature-accordion-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  transition: background-color 0.2s;
  user-select: none;
}

.feature-accordion-header:hover {
  background-color: var(--dark-800);
}

.feature-accordion-header:focus {
  outline: none;
  background-color: var(--dark-800);
}

.feature-accordion-icon {
  font-size: 1.75rem;
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--dark-800), var(--dark-700));
  border-radius: 8px;
}

.feature-accordion-title {
  flex: 1;
  min-width: 0;
}

.feature-accordion-title h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--dark-100);
  margin: 0 0 0.25rem 0;
}

.feature-accordion-title p {
  color: var(--dark-400);
  font-size: 0.875rem;
  margin: 0;
  line-height: 1.4;
}

.feature-accordion-chevron {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--dark-500);
  transition: transform 0.2s ease, color 0.2s;
  flex-shrink: 0;
  width: 1.5rem;
  text-align: center;
}

.feature-accordion-item:hover .feature-accordion-chevron {
  color: var(--dark-300);
}

.feature-accordion-item[open] .feature-accordion-chevron {
  transform: rotate(90deg);
  color: var(--accent-primary);
}

.feature-accordion-content {
  padding: 1.5rem;
  background-color: var(--dark-900);
  border-top: 1px solid var(--dark-700);
}

.feature-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.feature-column h4 {
  color: var(--accent-primary);
  font-size: 0.75rem;
  font-weight: 600;
  margin: 0 0 0.75rem 0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.feature-column ul {
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
}

.feature-column li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--dark-300);
  font-size: 0.875rem;
  line-height: 1.5;
}

.feature-column li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: 600;
}

.feature-column code {
  font-size: 0.75rem;
  padding: 0.15rem 0.4rem;
  background-color: var(--dark-800);
  border-radius: 4px;
  color: var(--accent-primary);
}

@media (max-width: 768px) {
  .feature-accordion-header {
    padding: 1rem 1.25rem;
    gap: 0.75rem;
  }

  .feature-accordion-icon {
    width: 2rem;
    height: 2rem;
    font-size: 1.25rem;
  }

  .feature-accordion-title h3 {
    font-size: 1rem;
  }

  .feature-accordion-title p {
    font-size: 0.8125rem;
  }

  .feature-accordion-content {
    padding: 1.25rem;
  }

  .feature-columns {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* Utilities */
.text-center {
  text-align: center;
}

.mb-2 {
  margin-bottom: 2rem;
}