:root {
  /* Deep Dark (OLED Pure Black #000000) Theme */
  --bg-primary: #000000;
  --bg-card: #000000;
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --accent-blue: #38bdf8;
  --pill-bg: #0d0d0d;
  --pill-text: #e4e4e7;
  --pill-active-bg: #ffffff;
  --pill-active-text: #000000;
  --border-color: #1a1a1a;
  --image-container-bg: #000000;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius-card: 16px;
  --radius-image: 12px;
}

[data-theme="light"] {
  /* Light Theme */
  --bg-primary: #f6f5ef;
  --bg-card: #ffffff;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --accent-blue: #3b82f6;
  --pill-bg: #ffffff;
  --pill-text: #4b5563;
  --pill-active-bg: #111827;
  --pill-active-text: #ffffff;
  --border-color: rgba(0, 0, 0, 0.08);
  --image-container-bg: #f1f5f9;
}

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

/* Zero transition on themes for instant, atomic 60fps switching without stutter */
body,
header.site-header,
.clock-card,
.card-image-container,
.card-title,
.chip,
.icon-btn,
footer.site-footer,
.modal-card,
.modal-preview-box,
analog-clock,
analog-clock * {
  transition: none !important;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: 100%;
  max-width: 1720px;
  margin: 0 auto;
  padding: 0 40px;
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
}

/* Header - Perfectly Centered Categories & Right Actions */
header.site-header {
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
}

/* Left: Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-primary);
  flex-shrink: 0;
}
.logo svg { width: 20px; height: 20px; }

/* Middle: Filters in the exact Center */
.filters {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 2px 0;
}

.filters::-webkit-scrollbar {
  display: none;
}

.chip {
  background: var(--pill-bg);
  color: var(--pill-text);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.chip:hover {
  opacity: 0.85;
}

.chip.active {
  background: var(--pill-active-bg);
  color: var(--pill-active-text);
  border-color: var(--pill-active-bg);
}

/* Right: Action Buttons */
.nav-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-shrink: 0;
}

.icon-btn {
  background: var(--pill-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 9999px;
}

.icon-btn:hover {
  opacity: 0.85;
}

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

/* Responsive Mobile Header */
@media (max-width: 1024px) {
  header.site-header {
    padding: 12px 0 10px;
  }
  .header-content {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-areas: 
      "logo actions"
      "filters filters";
    gap: 12px;
  }
  .logo {
    grid-area: logo;
  }
  .nav-actions {
    grid-area: actions;
    justify-self: end;
  }
  .filters {
    grid-area: filters;
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
    -webkit-overflow-scrolling: touch;
  }
}

/* Main Grid - Responsive Columns */
main.main-content {
  padding: 24px 0 60px;
}

.clock-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

@media (max-width: 1440px) { .clock-grid { grid-template-columns: repeat(4, 1fr); gap: 18px; } }
@media (max-width: 1100px) { .clock-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; } }
@media (max-width: 768px) { .clock-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; } }
@media (max-width: 480px) { .clock-grid { grid-template-columns: 1fr; gap: 16px; } }

/* Cards */
.clock-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 10px;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.clock-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 20px -4px rgba(0, 0, 0, 0.12);
}

.card-image-container {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--image-container-bg);
  border-radius: var(--radius-image);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 8px;
  box-sizing: border-box;
}

.card-image-container analog-clock {
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-content {
  padding: 14px 6px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.card-category {
  color: var(--accent-blue);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 40px;
}

/* Modal - Responsive Adaptive Layout */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-backdrop.active {
  display: flex;
}

.modal-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  width: 100%;
  max-width: 980px;
  max-height: 92vh;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 32px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-color);
  position: relative;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
}

.modal-close-btn {
  background: var(--pill-bg);
  border: 1px solid var(--border-color);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 16px;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close-btn:hover {
  opacity: 0.8;
}

.modal-body {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 32px;
  align-items: stretch;
}

.modal-preview-box {
  background: var(--image-container-bg);
  border-radius: var(--radius-image);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  min-height: 440px;
  height: 100%;
  width: 100%;
  overflow: hidden;
}

.modal-clock-stage {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 350px;
  overflow: hidden;
}

.modal-clock-stage analog-clock {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  max-height: 100%;
}

.modal-install-badge {
  font-family: var(--font-mono, monospace);
  font-size: 11.5px;
  color: var(--text-secondary);
  background: var(--bg-card);
  padding: 6px 14px;
  border-radius: 9999px;
  border: 1px solid var(--border-color);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  margin-top: 16px;
}

.modal-controls-box {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

.control-grid-2 {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-label {
  font-size: 11px;
  font-weight: 800;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.form-select, .form-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  outline: none;
  cursor: pointer;
}

.form-select:focus, .form-input:focus {
  border-color: var(--accent-blue);
}

/* Overhauled Modern Developer Code Box & Copy Button */
.code-box {
  background: #090d16;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  margin-top: 6px;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.code-lang-label {
  font-size: 11px;
  font-weight: 700;
  color: #94a3b8;
  font-family: var(--font-mono, monospace);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-copy-modal {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.08);
  color: #f8fafc;
  border: 1px solid rgba(255, 255, 255, 0.16);
  padding: 5px 12px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-copy-modal:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
  color: #ffffff;
}

.btn-copy-modal:active {
  transform: translateY(0);
}

.btn-copy-modal.copied {
  background: #059669 !important;
  color: #ffffff !important;
  border-color: #10b981 !important;
}

.code-box pre {
  margin: 0;
  padding: 14px;
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.55;
  font-family: var(--font-mono, monospace);
  font-size: 12px;
  color: #e2e8f0;
  overflow-x: auto;
  max-height: 180px;
}

/* Adaptive Mobile Styles for Modal */
@media (max-width: 880px) {
  .modal-backdrop {
    padding: 12px;
  }

  .modal-card {
    padding: 20px 16px;
    max-height: 94vh;
    border-radius: 20px;
  }

  .modal-header {
    margin-bottom: 16px;
    padding-bottom: 12px;
  }

  .modal-title {
    font-size: 17px;
  }

  .modal-body {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .modal-preview-box {
    min-height: 280px;
    padding: 16px;
  }

  .modal-clock-stage {
    min-height: 200px;
    max-height: 240px;
  }

  .modal-clock-stage analog-clock {
    max-width: 220px !important;
    max-height: 220px !important;
  }
}

/* Redesigned Footer */
footer.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 50px 0 40px;
  margin-top: 40px;
  background: var(--bg-primary);
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 2px;
  color: var(--text-primary);
  text-transform: uppercase;
}

.footer-desc {
  color: var(--text-secondary);
  font-size: 13px;
  max-width: 520px;
  line-height: 1.5;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 13px;
  font-weight: 600;
}

.footer-link {
  color: var(--text-primary);
}

.footer-link:hover {
  opacity: 0.7;
}

.footer-dot {
  color: var(--text-secondary);
  opacity: 0.5;
}

.footer-copy {
  color: var(--text-secondary);
  font-size: 12px;
  margin-top: 6px;
  opacity: 0.8;
}