/* YWD CMS — Frontend Styles */
:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --secondary: #7c3aed;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --surface: rgba(255, 255, 255, 0.88);
  --shadow-soft: 0 24px 48px rgba(15, 23, 42, 0.08);
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-8: 8px;
  --space-16: 16px;
  --space-24: 24px;
  --space-32: 32px;
  --space-40: 40px;
  --space-48: 48px;
  --space-64: 64px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --container-padding: 16px;
  --container-max: 100%;
  --content-max: 760px;
  --bp-xs: 30rem;
  --bp-sm: 48rem;
  --bp-md: 64rem;
  --bp-lg: 80rem;
  --bp-xl: 96rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(79, 70, 229, 0.12), transparent 36%),
    linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  line-height: 1.7;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

button,
input,
textarea {
  font: inherit;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-inline: var(--container-padding);
}

.page-section {
  padding-block: var(--space-40);
}

.page-section:first-of-type {
  padding-top: var(--space-32);
}

.page-section--hero {
  padding-block: var(--space-48);
}

.page-section--tight {
  padding-top: var(--space-32);
}

.layout {
  display: grid;
  gap: var(--space-32);
}

.content-shell {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
}

.surface-card {
  border: 1px solid rgba(229, 231, 235, 0.85);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(229, 231, 235, 0.8);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
}

.site-header .inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-16);
  padding-block: var(--space-16);
}

.site-logo {
  display: inline-flex;
  align-items: center;
  color: var(--text);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.site-logo:hover {
  text-decoration: none;
}

.site-logo img {
  max-height: 44px;
  width: auto;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-8);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding-inline: var(--space-16);
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--text);
  font-size: 0.95rem;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.site-nav a:hover {
  color: var(--primary);
  border-color: rgba(79, 70, 229, 0.14);
  background: rgba(79, 70, 229, 0.06);
  text-decoration: none;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
}

.hero__panel {
  padding: var(--space-40) var(--space-24);
  color: #ffffff;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.22), transparent 28%),
    linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 4rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

.hero p {
  max-width: 36rem;
  margin-top: var(--space-16);
  font-size: 1.05rem;
  opacity: 0.9;
}

/* Post list */
.post-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-24);
}

.post-card {
  padding: var(--space-24);
}

.post-card + .post-card {
  margin-top: 0;
}

.featured-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-16);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
  color: var(--muted);
  font-size: 0.875rem;
}

.post-meta .sep {
  color: var(--border);
}

.post-card h2 {
  margin-bottom: var(--space-8);
  font-size: clamp(1.625rem, 3vw, 2rem);
  line-height: 1.15;
  letter-spacing: -0.04em;
}

.post-card h2 a {
  color: var(--text);
}

.post-card h2 a:hover {
  color: var(--primary);
  text-decoration: none;
}

.post-excerpt {
  margin-bottom: var(--space-16);
  color: var(--muted);
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  font-weight: 600;
}

/* Category and tag badges */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
}

.post-card .tags,
.post-article > .tags {
  margin-top: var(--space-16);
}

.post-header .tags {
  margin-bottom: var(--space-16);
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding-inline: var(--space-16);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(248, 250, 252, 0.94);
  color: var(--muted);
  font-size: 0.75rem;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.tag:hover {
  border-color: var(--primary);
  background: var(--primary);
  color: #ffffff;
  text-decoration: none;
}

.tag-count {
  color: var(--muted);
  font-size: 0.75rem;
}

/* Single post */
.post-article {
  padding: var(--space-24);
}

.post-header {
  margin-bottom: var(--space-32);
}

.post-title {
  margin-bottom: var(--space-16);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

.post-featured-image {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border-radius: 16px;
  margin-bottom: var(--space-32);
}

.post-content {
  font-size: 1.05rem;
}

.post-content h2 {
  margin: var(--space-32) 0 var(--space-16);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  line-height: 1.1;
}

.post-content h3 {
  margin: var(--space-24) 0 var(--space-8);
  font-size: clamp(1.375rem, 2.5vw, 1.75rem);
  line-height: 1.2;
}

.post-content p,
.post-content ul,
.post-content ol,
.post-content pre,
.post-content blockquote {
  margin-bottom: var(--space-16);
}

.post-content ul,
.post-content ol {
  padding-left: var(--space-24);
}

.post-content pre {
  overflow-x: auto;
  padding: var(--space-24);
  border-radius: var(--radius-md);
  background: #0f172a;
  color: #e2e8f0;
}

.post-content code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.875em;
}

.post-content img {
  border-radius: var(--radius-sm);
}

.post-content blockquote {
  padding-left: var(--space-16);
  border-left: 4px solid var(--primary);
  color: var(--muted);
  font-style: italic;
}

.post-divider {
  margin-block: var(--space-48);
  border: 0;
  border-top: 1px solid var(--border);
}

/* Comments */
.comments-section {
  margin-top: var(--space-48);
}

.comments-section h3 {
  margin-bottom: var(--space-24);
  font-size: 1.5rem;
  line-height: 1.1;
}

.comment {
  display: flex;
  gap: var(--space-16);
  padding-bottom: var(--space-24);
  border-bottom: 1px solid var(--border);
}

.comment + .comment {
  margin-top: var(--space-24);
}

.comment:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.comment-avatar {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
}

.comment-meta {
  margin-bottom: var(--space-4);
  color: var(--muted);
  font-size: 0.875rem;
}

.comment-meta strong {
  color: var(--text);
}

.comment-form {
  margin-top: var(--space-32);
}

.comment-form h4 {
  margin-bottom: var(--space-16);
  font-size: 1.125rem;
}

.form-row {
  display: grid;
  gap: var(--space-16);
}

.form-group {
  margin-bottom: var(--space-16);
}

label {
  display: block;
  margin-bottom: var(--space-8);
  font-size: 0.8125rem;
  font-weight: 600;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  padding: var(--space-16);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #ffffff;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
  border-color: rgba(79, 70, 229, 0.5);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.btn-submit,
.search-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding-inline: var(--space-16);
  border: 0;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: #ffffff;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.btn-submit:hover,
.search-form button:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.comment-note {
  margin-top: var(--space-8);
  color: var(--muted);
  font-size: 0.75rem;
}

.is-hidden {
  display: none;
}

.alert {
  margin-bottom: var(--space-16);
  padding: var(--space-16);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
}

.alert-success {
  background: #ecfdf5;
  color: #166534;
}

.alert-danger {
  background: #fef2f2;
  color: #b91c1c;
}

/* Sidebar */
.sidebar {
  container-type: inline-size;
}

.sidebar-widget {
  padding: var(--space-24);
}

.sidebar-widget + .sidebar-widget {
  margin-top: var(--space-24);
}

.widget-title {
  margin-bottom: var(--space-16);
  padding-bottom: var(--space-8);
  border-bottom: 2px solid rgba(79, 70, 229, 0.2);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.category-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.category-list li + li {
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
}

.category-link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-8);
  color: var(--text);
}

/* Pagination and search */
.pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-8);
  margin-top: var(--space-32);
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  min-height: 40px;
  padding-inline: var(--space-16);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
}

.pagination a:hover {
  background: var(--bg-alt);
  text-decoration: none;
}

.pagination .current {
  border-color: var(--primary);
  background: var(--primary);
  color: #ffffff;
}

.search-form {
  display: grid;
  gap: var(--space-16);
}

.search-form__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-8);
}

.search-reset {
  color: var(--muted);
  font-size: 0.875rem;
}

/* Footer */
.site-footer {
  margin-top: var(--space-64);
  border-top: 1px solid rgba(229, 231, 235, 0.85);
  background: rgba(248, 250, 252, 0.9);
  color: var(--muted);
}

.site-footer .container {
  padding-block: var(--space-32);
  text-align: center;
  font-size: 0.875rem;
}

/* Empty states and links */
.empty-state {
  padding: var(--space-48) var(--space-24);
  text-align: center;
  color: var(--muted);
}

.empty-state__icon {
  font-size: 2.5rem;
}

.empty-state__text {
  margin-top: var(--space-16);
  font-size: 1.125rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  margin-top: var(--space-32);
  color: var(--muted);
  font-size: 0.875rem;
}

.not-found {
  text-align: center;
}

.not-found__panel {
  padding: var(--space-48) var(--space-24);
}

.not-found__icon {
  font-size: 4rem;
}

.not-found__title {
  margin: var(--space-16) 0 var(--space-8);
  font-size: clamp(2.5rem, 8vw, 4rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

.not-found__text {
  margin-bottom: var(--space-24);
  color: var(--muted);
  font-size: 1.125rem;
}

@container (min-width: 24rem) {
  .search-form {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
  }

  .search-form__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 48rem) {
  :root {
    --container-padding: 24px;
    --container-max: 720px;
  }

  .page-section {
    padding-block: var(--space-48);
  }

  .hero__panel,
  .post-card,
  .post-article,
  .sidebar-widget {
    padding: var(--space-32);
  }

  .form-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 64rem) {
  :root {
    --container-padding: 32px;
    --container-max: 960px;
  }

  .layout {
    grid-template-columns: minmax(0, 1.75fr) minmax(280px, 0.85fr);
    align-items: start;
    gap: var(--space-40);
  }

  .hero__panel {
    padding: var(--space-48);
  }
}

@media (min-width: 80rem) {
  :root {
    --container-max: 1152px;
  }
}

@media (min-width: 96rem) {
  :root {
    --container-max: 1344px;
  }
}