/* ===================================================================
   Design System — The Wild Meridian (weathered beach bar nautical theme)
   Light and dark mode via CSS custom properties.
   =================================================================== */

/* --- Custom Properties --- */

:root {
  --color-bg: #F5F0E8;
  --color-surface: #E8DFD0;
  --color-accent: #2C5F7A;
  --color-text: #2C2418;
  --color-text-muted: #7A6A55;
  --color-divider: #C8B89A;
  --font-display: 'Playfair Display', 'Times New Roman', serif;
  --font-body: 'Lora', Georgia, serif;
  --font-mono: 'Courier Prime', 'Courier New', monospace;
}

[data-theme="dark"] {
  --color-bg: #1A1F2E;
  --color-surface: #242B3D;
  --color-accent: #C9A84C;
  --color-text: #E8DFD0;
  --color-text-muted: #9A8B75;
  --color-divider: #3A4558;
}

/* --- Reset & Base --- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.7;
}

/* --- Focus visible (all interactive elements) --- */

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --- Navigation --- */

.site-nav {
  position: sticky;
  top: 0;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
  padding: 8px 24px;
  display: flex;
  align-items: center;
  z-index: 100;
}

.site-name {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  line-height: 1.15;
}

.site-name:hover {
  color: var(--color-accent);
}

.site-tagline {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-left: 16px;
}

@media (max-width: 767px) {
  .site-tagline {
    display: none;
  }
}

/* --- Nav Links (About, etc.) --- */

.nav-link {
  font-size: 14px;
  color: var(--color-text-muted);
  text-decoration: none;
  margin-left: 16px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-accent);
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (max-width: 767px) {
  .nav-link {
    display: inline-flex;
  }
}

/* --- Dark Mode Toggle --- */

.dark-toggle {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.dark-toggle:hover {
  color: var(--color-accent);
}

.dark-toggle .icon-sun {
  display: block;
}

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

.dark-toggle .icon-moon {
  display: none;
}

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

/* --- Layout Containers --- */

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 64px 32px;
}

.container-narrow {
  max-width: 700px;
}

/* --- Card Grid --- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

@media (max-width: 767px) {
  .card-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Post Card --- */

.post-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: 4px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 200ms ease, box-shadow 200ms ease;
  box-shadow:
    0 1px 3px rgba(44, 36, 24, 0.08),
    0 4px 12px rgba(44, 36, 24, 0.05);
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(44, 36, 24, 0.12);
}

[data-theme="dark"] .post-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .post-card {
  box-shadow:
    0 1px 3px rgba(0, 0, 0, 0.2),
    0 4px 12px rgba(0, 0, 0, 0.15);
}

.post-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --- Tags --- */

.tags-row {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.tag-pill {
  display: inline-block;
  padding: 4px 8px;
  border: 1px solid var(--color-divider);
  border-radius: 2px;
  font-size: 14px;
  color: var(--color-text-muted);
  background: rgba(44, 95, 122, 0.08);
  line-height: 1.4;
}

[data-theme="dark"] .tag-pill {
  background: rgba(201, 168, 76, 0.12);
}

/* --- Post Card Title --- */

.post-card-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
  margin: 8px 0;
}

.post-card-title a {
  color: var(--color-text);
  text-decoration: none;
}

.post-card-title a:hover {
  color: var(--color-accent);
}

/* --- Post Card Excerpt --- */

.post-card-excerpt {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-text);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  margin: 0;
}

/* --- Post Card Metadata --- */

.post-card-meta {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: auto;
  padding-top: 8px;
  line-height: 1.4;
}

/* --- Pagination --- */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
  font-size: 14px;
}

.pagination a {
  color: var(--color-text-muted);
  text-decoration: none;
  min-height: 44px;
  display: flex;
  align-items: center;
  padding: 0 8px;
}

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

.pagination-active {
  color: var(--color-accent);
  font-weight: 700;
  min-height: 44px;
  display: flex;
  align-items: center;
  padding: 0 8px;
}

.pagination-disabled {
  color: var(--color-text-muted);
  opacity: 0.4;
  min-height: 44px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  cursor: default;
}

.pagination-sep {
  color: var(--color-text-muted);
}

/* --- Empty State --- */

.empty-state {
  text-align: center;
  padding: 48px 0;
}

.empty-state h2 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
}

.empty-state p {
  color: var(--color-text-muted);
}

/* --- Post Page --- */

.post-page .post-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 8px;
}

.post-meta {
  font-size: 14px;
  color: var(--color-text-muted);
  margin: 8px 0 24px;
}

/* --- About Page --- */

.about-title {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 16px;
}

/* --- Table of Contents --- */

.toc {
  background-color: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: 4px;
  padding: 16px;
  margin-bottom: 24px;
}

.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toc-label {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.toc-toggle {
  background: none;
  border: none;
  color: var(--color-accent);
  cursor: pointer;
  font-size: 14px;
  font-family: var(--font-mono);
  padding: 4px 8px;
  min-height: 44px;
}

.toc-toggle:hover {
  opacity: 0.75;
}

.toc-list {
  margin: 8px 0 0;
  padding-left: 24px;
  max-height: 500px;
  overflow: hidden;
  transition: max-height 200ms ease;
}

.toc-list.collapsed {
  max-height: 0;
  margin-top: 0;
}

.toc-item {
  margin: 4px 0;
  font-size: 14px;
  line-height: 1.4;
}

.toc-level-3 {
  margin-left: 16px;
}

.toc-item a {
  color: var(--color-accent);
  text-decoration: none;
}

.toc-item a:hover {
  text-decoration: underline;
}

/* --- Rope Divider --- */

.rope-divider {
  display: block;
  width: 100%;
  height: 12px;
  margin: 24px 0;
  overflow: visible;
}

/* --- Post Body --- */

.post-body {
  line-height: 1.7;
}

.post-body h2,
.post-body h3,
.post-body h4 {
  font-family: var(--font-display);
  font-weight: 700;
}

.post-body h2 {
  font-size: 28px;
  margin: 32px 0 16px;
}

.post-body h3 {
  font-size: 22px;
  margin: 24px 0 12px;
}

.post-body p {
  margin: 0 0 16px;
}

.post-body pre {
  background-color: var(--color-surface);
  border-left: 3px solid var(--color-accent);
  padding: 16px;
  border-radius: 0 4px 4px 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  margin: 16px 0;
}

.post-body code {
  font-family: var(--font-mono);
  font-size: 14px;
}

.post-body p code,
.post-body li code {
  background-color: var(--color-surface);
  padding: 2px 4px;
  border-radius: 2px;
}

.post-body pre code {
  background: none;
  padding: 0;
}

.post-body a {
  color: var(--color-accent);
  text-decoration: underline;
}

.post-body img {
  max-width: 100%;
  height: auto;
}

.post-body blockquote {
  border-left: 3px solid var(--color-divider);
  padding-left: 16px;
  color: var(--color-text-muted);
  margin: 16px 0;
}

.post-body ul,
.post-body ol {
  padding-left: 24px;
  margin: 0 0 16px;
}

/* --- Error Page (404) --- */

.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: 32px;
}

.error-page h1 {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  margin: 16px 0;
}

.error-page p {
  font-size: 18px;
  color: var(--color-text-muted);
  max-width: 400px;
  margin-bottom: 24px;
}

/* --- CTA Button --- */

.cta-button {
  display: inline-block;
  background-color: var(--color-accent);
  color: var(--color-bg);
  padding: 16px 24px;
  border-radius: 4px;
  text-decoration: none;
  font-weight: 700;
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1;
}

.cta-button:hover {
  opacity: 0.9;
}

/* --- Footer --- */

.site-footer {
  padding: 24px;
  font-size: 14px;
  color: var(--color-text-muted);
}

.rss-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  margin-left: 8px;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 200ms ease;
}

.rss-link:hover {
  color: var(--color-accent);
}

/* --- Reaction bar --- */
.reaction-bar {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  padding: 16px 0;
  border-top: 1px solid var(--color-divider);
}

.reaction-btn {
  background: none;
  border: 2px solid var(--color-accent);
  border-radius: 4px;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  color: var(--color-text);
  transition: background 0.2s, color 0.2s;
  font-family: var(--font-body);
}

.reaction-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.reaction-btn.reacted,
.reaction-btn:disabled {
  background: var(--color-accent);
  color: var(--color-bg);
  cursor: default;
}

.reaction-btn.bounce .reaction-icon {
  animation: reaction-bounce 0.4s ease;
}

@keyframes reaction-bounce {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.4); }
  70%  { transform: scale(0.9); }
  100% { transform: scale(1); }
}

/* --- Background Grain Texture (ATMO-01) --- */

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23grain)' opacity='1'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px 200px;
}

[data-theme="dark"] body::before {
  opacity: 0.03;
}

/* === Animations & Transitions === */

/* --- Entry Animation Keyframe --- */

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* --- Page Load Fade-In (ANIM-02) --- */

.container {
  animation: fade-in 250ms ease-out both;
}

/* --- Post Card Stagger (ANIM-03) --- */

.card-grid .post-card {
  animation: fade-in 250ms ease-out both;
}

.card-grid .post-card:nth-child(1) { animation-delay: 0ms;   }
.card-grid .post-card:nth-child(2) { animation-delay: 75ms;  }
.card-grid .post-card:nth-child(3) { animation-delay: 150ms; }
.card-grid .post-card:nth-child(4) { animation-delay: 225ms; }
.card-grid .post-card:nth-child(5) { animation-delay: 300ms; }
.card-grid .post-card:nth-child(6) { animation-delay: 375ms; }

/* --- Dark Mode Color Transitions — .theme-ready Gate (ANIM-04, ANIM-05) --- */

.theme-ready body,
.theme-ready .site-nav,
.theme-ready .site-footer,
.theme-ready .dark-toggle,
.theme-ready .nav-link,
.theme-ready .reaction-btn,
.theme-ready .tag-pill,
.theme-ready .toc,
.theme-ready .post-body pre,
.theme-ready .post-body p code,
.theme-ready .post-body li code {
  transition: background-color 250ms ease, color 250ms ease, border-color 250ms ease;
}

/* Post card: preserve existing hover transitions alongside new color transitions */
.theme-ready .post-card {
  transition:
    transform 200ms ease,
    box-shadow 200ms ease,
    background-color 250ms ease,
    color 250ms ease,
    border-color 250ms ease;
}

/* --- Reduced Motion Guard (ANIM-01) — MUST be last --- */

@media (prefers-reduced-motion: reduce) {
  .container {
    animation: none;
  }

  .card-grid .post-card,
  .card-grid .post-card:nth-child(1),
  .card-grid .post-card:nth-child(2),
  .card-grid .post-card:nth-child(3),
  .card-grid .post-card:nth-child(4),
  .card-grid .post-card:nth-child(5),
  .card-grid .post-card:nth-child(6) {
    animation: none;
  }

  .theme-ready body,
  .theme-ready .site-nav,
  .theme-ready .post-card,
  .theme-ready .site-footer,
  .theme-ready .dark-toggle,
  .theme-ready .nav-link,
  .theme-ready .reaction-btn,
  .theme-ready .tag-pill,
  .theme-ready .toc,
  .theme-ready .post-body pre,
  .theme-ready .post-body p code,
  .theme-ready .post-body li code {
    transition: none;
  }

  .reaction-btn.bounce .reaction-icon {
    animation: none;
  }
}

/* === Phase 11: Template Changes === */

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer-copyright {
  text-align: right;
}

.footer-phrase {
  margin: 0 0 4px;
  font-style: italic;
  font-size: 14px;
  color: var(--color-text-muted);
}

.footer-copyright-line {
  margin: 0;
}

.list-hero {
  margin-bottom: 32px;
}

.list-hero-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 8px;
}

.list-hero-tagline {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 18px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--color-text-muted);
  margin: 0;
}

@media (max-width: 767px) {
  .footer-inner {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .footer-copyright {
    text-align: center;
  }
}