/* ==========================================================================
   MCP Browser — Custom Styling
   Complements vendored Pico CSS v2 with developer-focused aesthetics.
   ========================================================================== */

:root {
  --brand-primary: #2563eb;
  --brand-primary-hover: #1d4ed8;
  --brand-accent: #38bdf8;
  --terminal-bg: #0b0f19;
  --terminal-border: #1e293b;
  --terminal-text: #e2e8f0;
  --card-radius: 0.625rem;
  --transition-smooth: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Visually hidden for screen reader accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Responsive table overflow wrapper */
.overflow-auto {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

[data-theme="dark"] {
  --brand-primary: #3b82f6;
  --brand-primary-hover: #60a5fa;
  --terminal-bg: #030712;
  --terminal-border: #1f2937;
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background-color: var(--pico-background-color);
  border-bottom: 1px solid var(--pico-muted-border-color);
  padding: 0.5rem 0;
  overflow-x: clip;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--pico-color);
}

.brand-icon,
.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  object-fit: cover;
}

.version-badge {
  font-size: 0.725rem;
  font-weight: 600;
  font-family: var(--pico-font-family-monospace);
  padding: 0.15rem 0.45rem;
  border-radius: 9999px;
  background-color: var(--pico-card-background-color);
  border: 1px solid var(--pico-muted-border-color);
  color: var(--pico-muted-color);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.theme-toggle-btn {
  background: transparent;
  border: 1px solid var(--pico-muted-border-color);
  color: var(--pico-color);
  padding: 0.35rem 0.65rem;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1;
  border-radius: var(--pico-border-radius);
  cursor: pointer;
  transition: background-color var(--transition-smooth), border-color var(--transition-smooth);
}

.theme-toggle-btn:hover {
  background-color: var(--pico-card-background-color);
  border-color: var(--brand-primary);
}

/* --------------------------------------------------------------------------
   Hero Section & Animations
   -------------------------------------------------------------------------- */
.hero-section {
  padding: 3.5rem 0 2rem;
  text-align: center;
  animation: heroFadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.hero-highlight {
  background: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--pico-muted-color);
  max-width: 760px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-actions a {
  margin: 0;
}

/* --------------------------------------------------------------------------
   Terminal Install Snippet Box
   -------------------------------------------------------------------------- */
.terminal-box {
  background: var(--terminal-bg);
  border: 1px solid var(--terminal-border);
  border-radius: var(--card-radius);
  color: var(--terminal-text);
  max-width: 680px;
  margin: 0 auto 2.5rem;
  overflow: hidden;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.25), 0 8px 10px -6px rgba(0, 0, 0, 0.2);
  text-align: left;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background-color: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--terminal-border);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #eab308; }
.dot-green { background: #22c55e; }

.terminal-tabs {
  display: flex;
  gap: 4px;
}

.terminal-tab {
  background: transparent;
  border: none;
  color: #94a3b8;
  font-family: var(--pico-font-family-monospace);
  font-size: 0.775rem;
  padding: 0.25rem 0.6rem;
  margin: 0;
  border-radius: 4px;
  cursor: pointer;
  transition: color var(--transition-smooth), background-color var(--transition-smooth);
}

.terminal-tab:hover {
  color: #f1f5f9;
  background-color: rgba(255, 255, 255, 0.06);
}

.terminal-tab.active {
  color: #38bdf8;
  background-color: rgba(56, 189, 248, 0.12);
  font-weight: 600;
}

.terminal-body {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
}

.terminal-code {
  font-family: var(--pico-font-family-monospace);
  font-size: 0.875rem;
  color: #f8fafc;
  margin: 0;
  min-width: 0;
  overflow-x: auto;
  white-space: nowrap;
}

.terminal-prompt {
  color: #38bdf8;
  user-select: none;
  margin-right: 0.5rem;
}

.copy-btn {
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #e2e8f0;
  padding: 0.35rem 0.65rem;
  margin: 0;
  font-size: 0.775rem;
  border-radius: 4px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
  transition: all var(--transition-smooth);
}

.copy-btn:hover {
  background-color: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.3);
  color: #ffffff;
}

.copy-btn.copied {
  background-color: #059669;
  border-color: #10b981;
  color: #ffffff;
  animation: copyPop 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes copyPop {
  0% { transform: scale(0.92); }
  50% { transform: scale(1.08); }
  100% { transform: scale(1); }
}

/* --------------------------------------------------------------------------
   Hero Screenshot Card
   -------------------------------------------------------------------------- */
.hero-preview {
  max-width: 960px;
  margin: 0 auto;
  border-radius: var(--card-radius);
  overflow: hidden;
  border: 1px solid var(--pico-muted-border-color);
  box-shadow: 0 20px 35px -10px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

.hero-preview:hover {
  transform: translateY(-4px);
  box-shadow: 0 25px 45px -10px rgba(37, 99, 235, 0.15);
  border-color: var(--brand-primary);
}

.hero-preview img {
  width: 100%;
  height: auto;
  display: block;
  transition: opacity 0.3s ease;
}

/* --------------------------------------------------------------------------
   Feature Cards Grid
   -------------------------------------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.feature-card {
  padding: 1.5rem;
  border-radius: var(--card-radius);
  border: 1px solid var(--pico-muted-border-color);
  background-color: var(--pico-card-background-color);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px -6px rgba(0, 0, 0, 0.08);
}

.feature-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
  display: inline-block;
}

/* --------------------------------------------------------------------------
   Screenshots Gallery & Lightbox
   -------------------------------------------------------------------------- */
.gallery-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

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

.gallery-card {
  background-color: var(--pico-card-background-color);
  border: 1px solid var(--pico-muted-border-color);
  border-radius: var(--card-radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

.gallery-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 28px -6px rgba(0, 0, 0, 0.12);
  border-color: var(--brand-primary);
}

.gallery-card:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 2px;
}

.gallery-thumb-wrapper {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background-color: var(--terminal-bg);
}

.gallery-thumb-wrapper img,
.gallery-thumb-wrapper .gallery-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.3s ease;
}

.gallery-thumb-wrapper img.active,
.gallery-thumb-wrapper .gallery-img.active {
  opacity: 1;
  pointer-events: auto;
}

.gallery-card:hover .gallery-thumb-wrapper img.active,
.gallery-card:hover .gallery-thumb-wrapper .gallery-img.active {
  transform: scale(1.03);
}

.gallery-card-body {
  padding: 1rem;
}

.gallery-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}

.gallery-card-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0;
  line-height: 1.3;
}

/* Card Theme Toggle (Light / Dark segmented control) */
.card-theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background-color: rgba(0, 0, 0, 0.06);
  border: 1px solid var(--pico-muted-border-color);
  border-radius: 9999px;
  padding: 2px;
}

[data-theme="dark"] .card-theme-toggle {
  background-color: rgba(255, 255, 255, 0.08);
}

.theme-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.55rem;
  margin: 0;
  font-size: 0.725rem;
  font-weight: 500;
  line-height: 1.2;
  color: var(--pico-muted-color);
  background: transparent;
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  transition: background-color var(--transition-smooth), color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.theme-tab-btn:hover:not(.active) {
  color: var(--pico-color);
  background-color: rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .theme-tab-btn:hover:not(.active) {
  background-color: rgba(255, 255, 255, 0.06);
}

.theme-tab-btn.active {
  color: var(--pico-color);
  background-color: #ffffff;
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

[data-theme="dark"] .theme-tab-btn.active {
  background-color: var(--pico-card-background-color);
  color: #f8fafc;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

.theme-tab-btn:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 1px;
}

.gallery-card-desc {
  font-size: 0.8rem;
  color: var(--pico-muted-color);
  margin: 0;
}

/* Lightbox Modal */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background-color: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.lightbox-modal.active {
  display: flex;
  animation: heroFadeIn 0.25s ease both;
}

.lightbox-content {
  position: relative;
  max-width: 1200px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-image-wrapper {
  max-width: 100%;
  max-height: calc(90vh - 80px);
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

.lightbox-image-wrapper img {
  max-width: 100%;
  max-height: calc(90vh - 80px);
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}

.lightbox-caption-bar {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  color: #f1f5f9;
  font-size: 0.9rem;
}

.lightbox-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #ffffff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0;
  margin: 0;
  transition: background-color var(--transition-smooth), transform var(--transition-smooth);
}

.lightbox-nav-btn:hover {
  background: rgba(37, 99, 235, 0.9);
  transform: translateY(-50%) scale(1.08);
}

.lightbox-prev { left: -22px; }
.lightbox-next { right: -22px; }

.lightbox-close-btn {
  position: absolute;
  top: -40px;
  right: 0;
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 1.75rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  margin: 0;
  line-height: 1;
}

/* --------------------------------------------------------------------------
   Downloads Grid & Binary Cards
   -------------------------------------------------------------------------- */
.downloads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}

.download-card {
  padding: 1.25rem;
  border-radius: var(--card-radius);
  border: 1px solid var(--pico-muted-border-color);
  background-color: var(--pico-card-background-color);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

.download-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.1);
  border-color: var(--brand-primary);
}

.download-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.os-badge {
  font-size: 0.725rem;
  font-family: var(--pico-font-family-monospace);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--brand-primary);
  font-weight: 600;
}

.download-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
}

.download-desc {
  font-size: 0.825rem;
  color: var(--pico-muted-color);
  margin-bottom: 1rem;
}

.download-btn {
  margin: 0;
  width: 100%;
  font-size: 0.875rem;
  padding: 0.55rem 0.75rem;
}

.download-subtext {
  font-size: 0.775rem;
  text-align: center;
  margin: 0.5rem 0 0;
}

.download-subtext a {
  color: var(--pico-muted-color);
  text-decoration: underline;
}

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

.integrity-card {
  padding: 1.25rem;
  border-radius: var(--card-radius);
  border: 1px solid var(--pico-muted-border-color);
  background-color: var(--pico-card-background-color);
  margin-top: 1.5rem;
}

.integrity-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.integrity-card pre {
  margin: 0.75rem 0;
}

/* --------------------------------------------------------------------------
   Security Badges & Table
   -------------------------------------------------------------------------- */
.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}

.security-card {
  padding: 1.25rem;
  border-radius: var(--card-radius);
  border: 1px solid var(--pico-muted-border-color);
  background-color: var(--pico-card-background-color);
}

.security-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.transport-badge {
  font-size: 0.725rem;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-family: var(--pico-font-family-monospace);
  margin-right: 0.35rem;
}

.badge-stdio { background: rgba(56, 189, 248, 0.15); color: #0284c7; }
.badge-sse { background: rgba(34, 197, 94, 0.15); color: #16a34a; }
.badge-readonly { background: rgba(234, 179, 8, 0.15); color: #ca8a04; }

/* --------------------------------------------------------------------------
   Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .site-header nav {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .nav-links {
    overflow-x: auto;
    max-width: 100%;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }

  .lightbox-prev {
    left: 8px;
  }

  .lightbox-next {
    right: 8px;
  }

  .lightbox-close-btn {
    top: -35px;
    right: 0;
  }
}

/* --------------------------------------------------------------------------
   Accessibility: Reduced Motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}