/* ============================================
   Lucky Stone — Golden Stone 金石風格 UI/UX
   ============================================
   Complete CSS-only redesign for Mainroad theme.
   Rollback: git checkout -- static/css/custom.css
   ============================================ */

/* ===========================================
   1. CSS Custom Properties
   =========================================== */
:root {
  /* Core palette */
  --gold: #c6a97d;
  --gold-light: #d4bf9a;
  --gold-dark: #a88c5e;
  --brown-dark: #3d2e1f;
  --brown-mid: #6b5d4f;
  --brown-light: #a89279;
  --cream: #f8f4f0;
  --cream-dark: #f3ede6;
  --border: #e8ddd0;
  --white: #ffffff;
  --code-text: #8b5e3c;

  /* Shadows */
  --shadow-card: 0 1px 3px rgba(139, 115, 85, 0.06),
                 0 4px 8px rgba(139, 115, 85, 0.06),
                 0 8px 20px rgba(139, 115, 85, 0.05),
                 0 16px 40px rgba(139, 115, 85, 0.03);
  --shadow-card-hover: 0 2px 6px rgba(139, 115, 85, 0.08),
                       0 6px 16px rgba(139, 115, 85, 0.08),
                       0 12px 28px rgba(139, 115, 85, 0.07),
                       0 20px 48px rgba(139, 115, 85, 0.05);
  --shadow-container: 0 2px 8px rgba(139, 115, 85, 0.05),
                      0 8px 24px rgba(139, 115, 85, 0.05),
                      0 16px 48px rgba(139, 115, 85, 0.04),
                      0 24px 64px rgba(139, 115, 85, 0.03);
  --shadow-small: 0 1px 4px rgba(139, 115, 85, 0.08),
                  0 2px 8px rgba(139, 115, 85, 0.06);

  /* Spacing */
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 20px;
  --radius-circle: 50%;

  /* Animation */
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration: 0.3s;
  --duration-slow: 0.5s;
}

/* ===========================================
   2. Base & Container
   =========================================== */
body {
  font-family: "Noto Sans TC", "Open Sans", sans-serif;
  font-size: 15px;
  font-size: 0.9375rem;
  line-height: 1.8;
  background: var(--cream);
  color: var(--brown-dark);
}

.container--outer {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-container);
  overflow: hidden;
}

.wrapper {
  background: var(--white);
  padding: var(--space-lg);
}

/* ===========================================
   3. Header / Logo — centered + decorative stars
   =========================================== */
.header {
  background: var(--cream);
  padding: var(--space-xl) var(--space-lg);
}

.logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--cream);
  padding: var(--space-lg) var(--space-md);
}

.logo__link {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.logo__image {
  border-radius: var(--radius-circle);
  border: 3px solid var(--gold);
  box-shadow: 0 0 0 6px rgba(198, 169, 125, 0.15),
              var(--shadow-small);
  margin-bottom: var(--space-sm);
}

.logo__title {
  color: var(--brown-dark);
  font-size: 1.6rem;
  letter-spacing: 2px;
  position: relative;
  display: inline-block;
  padding: 0 2.2em;
}

.logo__title::before,
.logo__title::after {
  content: "✦";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gold);
  font-size: 0.65em;
  opacity: 0.7;
}

.logo__title::before {
  left: 0;
}

.logo__title::after {
  right: 0;
}

.logo__tagline {
  color: var(--brown-light);
  letter-spacing: 3px;
  font-size: 0.8rem;
  margin-top: var(--space-xs);
  padding-top: var(--space-sm);
  border-top: none;
  position: relative;
}

.logo__tagline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

/* ===========================================
   4. Divider — gradient line + diamond
   =========================================== */
.divider {
  background: transparent;
  height: auto;
  padding: 0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 20px;
}

.divider::before {
  content: "";
  position: absolute;
  left: 10%;
  right: 10%;
  top: 50%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-light), var(--gold), var(--gold-light), transparent);
}

.divider::after {
  content: "◆";
  position: relative;
  z-index: 1;
  color: var(--gold);
  font-size: 10px;
  background: var(--cream);
  padding: 0 12px;
  line-height: 1;
}

/* ===========================================
   5. Main Menu
   =========================================== */
.menu__btn {
  background: var(--brown-dark);
}

.menu__list {
  background: var(--brown-dark);
}

.menu__item:hover {
  background: var(--gold);
}

.menu__item--active {
  background: var(--gold);
}

.menu__link {
  letter-spacing: 2px;
}

@media screen and (min-width: 767px) {
  .menu {
    border-bottom: 2px solid var(--gold);
  }
}

/* ===========================================
   6. Typography
   =========================================== */
h1, h2, h3, h4, h5, h6 {
  color: var(--brown-dark);
}

h1 {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: 1px;
}

h2 {
  font-size: 1.45rem;
  font-weight: 700;
}

a {
  color: var(--brown-dark);
  transition: color var(--duration) var(--ease-out);
}

a:hover {
  color: var(--gold);
}

figcaption {
  color: var(--brown-mid);
}

hr {
  border-top: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

blockquote {
  border-left: 3px solid var(--gold);
  background: linear-gradient(135deg, rgba(198, 169, 125, 0.06), rgba(248, 244, 240, 0.8));
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-left: 0;
}

/* Article-internal h2 with gold underline accent */
.content h2 {
  position: relative;
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.content h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  border-radius: 2px;
}

code {
  background-color: var(--cream-dark);
  border-color: var(--border);
  color: var(--code-text);
}

pre {
  color: var(--brown-dark);
}

pre, code {
  background-color: var(--cream-dark);
  border-color: var(--border);
}

kbd {
  background-color: var(--brown-dark);
}

mark {
  background-color: #f5e6c8;
}

/* Content links */
.content a,
.warning a,
.authorbox__description a {
  color: var(--gold);
  text-decoration-color: rgba(198, 169, 125, 0.3);
}

.content a:hover,
.warning a:hover,
.authorbox__description a:hover {
  color: var(--gold-dark);
  text-decoration-color: var(--gold);
}

/* ===========================================
   7. Post List Cards — floating cards + hover gold bar
   =========================================== */
.list__item {
  position: relative;
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out);
  overflow: hidden;
}

/* Left gold accent bar on hover */
.list__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--gold-light), var(--gold), var(--gold-dark));
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  opacity: 0;
  transition: opacity var(--duration) var(--ease-out);
}

.list__item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.list__item:hover::before {
  opacity: 1;
}

.list__header {
  margin-bottom: var(--space-xs);
}

.list__title {
  font-size: 1.15rem;
  letter-spacing: 0.5px;
  font-weight: 700;
}

.list__thumbnail {
  max-width: 235px;
  overflow: hidden;
  border-radius: var(--radius-md);
}

.list__thumbnail img {
  border-radius: var(--radius-md);
  max-height: 180px;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.list__item:hover .list__thumbnail img {
  transform: scale(1.03);
}

/* Read More Link — inline text style, no button look */
.list__footer-readmore.btn {
  display: inline-block;
  background: transparent !important;
  color: var(--brown-light) !important;
  border: none !important;
  border-radius: 0 !important;
  padding: 0 !important;
  letter-spacing: 0.5px;
  font-size: 0.8rem;
  font-weight: 400 !important;
  transition: color var(--duration) var(--ease-out);
}

.list__footer-readmore.btn::after {
  content: " →";
  transition: margin-left var(--duration) var(--ease-out);
  margin-left: 0;
  display: inline-block;
}

.list__footer-readmore.btn:hover {
  background: transparent !important;
  color: var(--gold) !important;
}

.list__footer-readmore.btn:hover::after {
  margin-left: 4px;
}

/* ===========================================
   8. Post Meta
   =========================================== */
.meta,
.meta a {
  color: var(--brown-light);
  font-size: 0.6875rem;
  letter-spacing: 1px;
}

.meta a:hover {
  color: var(--gold);
}

.meta__icon {
  fill: var(--gold);
}

.post__meta {
  border-top: 1px dotted var(--border);
  border-bottom: 1px dotted var(--border);
}

/* ===========================================
   9. Single Post — centered header + decorative meta lines
   =========================================== */
.post__header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.post__title {
  font-size: 2rem;
  letter-spacing: 1px;
  margin-bottom: var(--space-md);
}

.post__meta {
  position: relative;
  padding: var(--space-md) 0;
  margin: var(--space-md) 0 var(--space-lg);
}

.post__meta::before,
.post__meta::after {
  content: "";
  position: absolute;
  left: 20%;
  right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-light), transparent);
}

.post__meta::before {
  top: 0;
}

.post__meta::after {
  bottom: 0;
}

.post__thumbnail img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

/* ===========================================
   10. Tags
   =========================================== */
.tags__item {
  background: var(--brown-dark);
  border-radius: var(--radius-pill);
  transition: background var(--duration) var(--ease-out);
}

.tags__item:hover {
  background: var(--gold);
}

.tags__link,
.tags__link:hover {
  padding: 6px 14px;
}

.tags__badge {
  background: var(--gold);
  border-radius: var(--radius-pill) 0 0 var(--radius-pill);
}

/* ===========================================
   11. Table of Contents
   =========================================== */
.toc {
  border-color: var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.toc__title {
  background: var(--brown-dark);
}

.toc__menu a {
  color: var(--gold);
  border-bottom-color: var(--border);
}

/* ===========================================
   12. Author Box
   =========================================== */
.authorbox {
  border-top-color: var(--border);
  border-bottom-color: var(--border);
}

.authorbox__avatar {
  border-color: var(--border);
  border-radius: var(--radius-sm);
}

/* Pager */
.pager {
  border-bottom-color: var(--border);
}

/* ===========================================
   13. Sidebar Widgets — individual card style
   =========================================== */
.sidebar .widget {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-small);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  transition: box-shadow var(--duration) var(--ease-out);
}

.sidebar .widget:hover {
  box-shadow: var(--shadow-card);
}

.widget__title {
  text-align: center;
  letter-spacing: 2px;
  border-bottom: none;
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-md);
  position: relative;
  font-size: 0.85rem;
  text-transform: uppercase;
}

.widget__title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-light), var(--gold), var(--gold-light));
  border-radius: 1px;
}

.widget__item {
  border-bottom-color: var(--border);
  transition: all var(--duration) var(--ease-out);
}

.widget__item:hover {
  color: var(--gold);
  padding-left: var(--space-xs);
}

.widget__counter--bubble {
  color: var(--brown-mid);
  background: var(--cream-dark);
}

/* Search Widget */
.widget-search__form {
  background: var(--cream);
  border-radius: var(--radius-md);
}

.widget-search__field {
  border-color: var(--border);
  border-radius: var(--radius-pill);
  background: var(--white);
  font-size: 12px;
}

.widget-search__field:active,
.widget-search__field:focus {
  border-color: var(--gold);
  outline: none;
}

/* Tag List Widget */
.widget-taglist__link {
  color: var(--brown-mid) !important;
  background: transparent !important;
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 14px;
  font-size: 11px;
  transition: all var(--duration) var(--ease-out);
}

.widget-taglist__link:hover {
  color: var(--gold) !important;
  background: rgba(198, 169, 125, 0.08) !important;
  border-color: var(--gold);
}

/* Languages Widget */
.widget-languages__link-btn {
  border-radius: 4px;
}

.widget-languages__link:hover .widget-languages__link-btn {
  background: var(--gold);
}

/* ===========================================
   14. Pagination — bordered + gold fill hover
   =========================================== */
.pagination__item {
  color: var(--brown-dark);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--duration) var(--ease-out);
}

.pagination__item:hover {
  color: var(--white);
  background: var(--gold);
  border-color: var(--gold);
  transform: translateY(-2px);
  box-shadow: 0 3px 10px rgba(198, 169, 125, 0.25);
}

.pagination__item--current {
  color: var(--white);
  background: var(--gold);
  border-color: var(--gold);
}

/* ===========================================
   15. Footer — gradient gold top border + centered
   =========================================== */
.footer {
  background: var(--brown-dark);
  color: var(--brown-light);
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  position: relative;
  border-top: none;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold-light), var(--gold), var(--gold-light), transparent);
}

.footer a {
  color: #d4c4b0;
  transition: color var(--duration) var(--ease-out);
}

.footer a:hover {
  color: var(--gold);
}

/* ===========================================
   16. Forms
   =========================================== */
input {
  background: var(--cream);
  border-color: var(--border);
}

input[type=text]:hover,
input[type=email]:hover,
input[type=tel]:hover,
input[type=url]:hover,
textarea:hover {
  border-color: var(--gold);
}

input[type=submit],
input[type=reset] {
  background: var(--brown-dark);
  border-radius: var(--radius-pill);
  transition: background var(--duration) var(--ease-out);
}

input[type=submit]:hover,
input[type=reset]:hover {
  background: var(--gold);
}

textarea {
  background: var(--cream);
  border-color: var(--border);
}

/* ===========================================
   17. Tables
   =========================================== */
table {
  border-top-color: var(--border);
  border-left-color: var(--border);
}

td, th {
  border-right-color: var(--border);
  border-bottom-color: var(--border);
}

/* ===========================================
   18. Warning / Empty state
   =========================================== */
.warning {
  border-color: var(--border);
}

.warning__icon {
  fill: var(--border);
}

/* ===========================================
   19. Animations — staggered fade-in
   =========================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Post cards staggered entry */
.list__item {
  animation: fadeInUp var(--duration-slow) var(--ease-out) both;
}

.list__item:nth-child(1) { animation-delay: 0.05s; }
.list__item:nth-child(2) { animation-delay: 0.12s; }
.list__item:nth-child(3) { animation-delay: 0.19s; }
.list__item:nth-child(4) { animation-delay: 0.26s; }
.list__item:nth-child(5) { animation-delay: 0.33s; }
.list__item:nth-child(6) { animation-delay: 0.40s; }
.list__item:nth-child(7) { animation-delay: 0.47s; }
.list__item:nth-child(8) { animation-delay: 0.54s; }
.list__item:nth-child(9) { animation-delay: 0.61s; }
.list__item:nth-child(10) { animation-delay: 0.68s; }

/* Sidebar widgets staggered entry */
.sidebar .widget {
  animation: fadeInUp var(--duration-slow) var(--ease-out) both;
}

.sidebar .widget:nth-child(1) { animation-delay: 0.1s; }
.sidebar .widget:nth-child(2) { animation-delay: 0.2s; }
.sidebar .widget:nth-child(3) { animation-delay: 0.3s; }
.sidebar .widget:nth-child(4) { animation-delay: 0.4s; }
.sidebar .widget:nth-child(5) { animation-delay: 0.5s; }
.sidebar .widget:nth-child(6) { animation-delay: 0.6s; }

/* Single post content fade-in */
.post__content {
  animation: fadeInUp 0.6s var(--ease-out) 0.15s both;
}

/* Accessibility: respect reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===========================================
   20. Responsive — mobile adjustments
   =========================================== */
@media screen and (max-width: 620px) {
  /* Remove decorative elements on mobile */
  .logo__title::before,
  .logo__title::after {
    display: none;
  }

  .logo__title {
    padding: 0;
    font-size: 1.3rem;
  }

  .divider::after {
    display: none;
  }

  /* Tighter spacing */
  .wrapper {
    padding: var(--space-md);
  }

  .list__item {
    padding: var(--space-md);
    margin-bottom: var(--space-md);
    border-radius: var(--radius-md);
  }

  .list__title {
    font-size: 1rem;
    letter-spacing: 0;
  }

  .meta,
  .meta a {
    font-size: 0.625rem;
  }

  /* Post header left-align on mobile */
  .post__header {
    text-align: left;
  }

  .post__title {
    font-size: 1.5rem;
  }

  .post__meta::before,
  .post__meta::after {
    left: 0;
    right: 0;
  }

  /* Sidebar widgets tighter */
  .sidebar .widget {
    padding: var(--space-md);
    border-radius: var(--radius-md);
  }

  /* Container no outer radius on mobile */
  .container--outer {
    border-radius: 0;
  }

  /* Footer less padding */
  .footer {
    padding: var(--space-xl) var(--space-md);
  }
}

@media screen and (max-width: 480px) {
  .logo__tagline {
    letter-spacing: 1.5px;
    font-size: 0.72rem;
  }

  .list__thumbnail {
    max-width: 100%;
  }
}