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

/* === Light Mode (default) === */
:root {
  --color-bg: #f5f5f5;
  --color-surface: #ffffff;
  --color-surface-hover: #fafafa;
  --color-border: #e2e2e2;
  --color-text: #1a1a1a;
  --color-text-muted: #7a7a7a;
  --color-primary: #4a6b5d;
  --color-primary-hover: #3d5a4e;
  --color-accent-green: #4a6b5d;
  --color-accent-orange: #b8860b;
  --color-accent-red: #c0392b;
  --color-code-bg: #1e1e1e;
  --color-code-text: #d4d4d4;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --transition: 0.2s ease;
  --container-max: 1120px;
}

/* === Dark Mode === */
[data-theme="dark"] {
  --color-bg: #0f1117;
  --color-surface: #181a20;
  --color-surface-hover: #1e2028;
  --color-border: #2a2d37;
  --color-text: #e1e3ea;
  --color-text-muted: #8b8fa3;
  --color-primary: #6c8c7d;
  --color-primary-hover: #8ba99a;
  --color-accent-green: #6c8c7d;
  --color-accent-orange: #f0a05a;
  --color-accent-red: #f06060;
  --color-code-bg: #0b0c10;
  --color-code-text: #d4d4d4;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* === Layout === */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* === Header === */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 2.5rem 0 1.75rem;
  text-align: center;
  position: relative;
}

.site-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.site-subtitle {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

/* === Theme Toggle === */
.theme-toggle {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.4rem 0.55rem;
  font-size: 1.05rem;
  line-height: 1;
  transition: color var(--transition), border-color var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  display: none;
}

/* Light mode: show moon (click to go dark) */
:root .theme-toggle .icon-moon {
  display: inline;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: inline;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

/* === Search === */
.search-wrapper {
  position: relative;
  margin-top: 1.5rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.search-clear {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 1.15rem;
  line-height: 1;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.25rem 0.4rem;
  border-radius: 4px;
  transition: color var(--transition), background var(--transition);
}

.search-clear:hover {
  color: var(--color-text);
  background: var(--color-border);
}

.search-input {
  width: 100%;
  padding: 0.75rem 2.25rem 0.75rem 1rem;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition);
}

.search-input::placeholder {
  color: var(--color-text-muted);
}

.search-input:focus {
  border-color: var(--color-primary);
}

/* === Category Filters === */
.category-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.filter-pill {
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.filter-pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-pill.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* === Snippet Count === */
.snippet-count {
  padding: 1.5rem 0 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* === Snippet Grid === */
.snippet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
  padding-bottom: 3rem;
}

/* === Snippet Card === */
.snippet-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.snippet-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.snippet-card__type {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.snippet-card__title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.snippet-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  flex: 1;
  margin-bottom: 1rem;
}

.snippet-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

/* Tags */
.tag {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  font-size: 0.7rem;
  font-weight: 500;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
  color: var(--color-primary);
}

/* Difficulty Badge */
.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  font-size: 0.7rem;
  font-weight: 600;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge--beginner {
  background: rgba(74, 107, 93, 0.12);
  color: var(--color-accent-green);
}

.badge--intermediate {
  background: rgba(184, 134, 11, 0.12);
  color: var(--color-accent-orange);
}

.badge--advanced {
  background: rgba(192, 57, 43, 0.12);
  color: var(--color-accent-red);
}

/* Button */
.btn {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  font-size: 0.85rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition);
  text-align: center;
}

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

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

.btn--block {
  width: 100%;
}

/* === Modal === */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal.hidden {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
}

.modal-content {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

/* Close button */
.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  font-size: 1.15rem;
  color: var(--color-text-muted);
  cursor: pointer;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition), border-color var(--transition);
}

.modal-close:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

/* Type label */
.modal-type {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

/* Title */
.modal-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
  padding-right: 2.5rem;
}

/* Description */
.modal-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 1.75rem;
}

/* Two-column body */
.modal-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
  margin-bottom: 1.75rem;
}

/* Instructions */
.modal-instructions-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.modal-steps {
  list-style: none;
  padding: 0;
  counter-reset: step;
}

.modal-steps li {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--color-text);
}

.modal-steps li::before {
  counter-increment: step;
  content: counter(step);
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.1rem;
}

/* Source code panel */
.modal-code-panel {
  display: flex;
  flex-direction: column;
}

.modal-code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.65rem;
}

.modal-code-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.copy-code-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.copy-code-btn:hover {
  border-color: var(--color-text-muted);
  background: var(--color-bg);
}

.copy-code-btn svg {
  width: 14px;
  height: 14px;
}

.modal-code-block {
  background: var(--color-code-bg);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  overflow-x: auto;
  flex: 1;
}

.modal-code-block code {
  font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas,
    "DejaVu Sans Mono", monospace;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--color-code-text);
  white-space: pre;
}

/* Footer actions */
.modal-footer {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-top: 0.25rem;
}

.btn--done {
  padding: 0.65rem 1.5rem;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius);
}

.modal-footer-file {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.modal-footer-file strong {
  color: var(--color-text);
}

/* === No Results === */
.no-results {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* === Footer === */
.site-footer {
  margin-top: auto;
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

/* === Utilities === */
.hidden {
  display: none !important;
}

/* === Responsive === */
@media (max-width: 720px) {
  .modal-body {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 1.75rem 0 1.25rem;
  }

  .site-title {
    font-size: 1.35rem;
  }

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

  .modal-content {
    width: 100%;
    padding: 1.25rem;
  }

  .modal-title {
    font-size: 1.2rem;
  }
}