/* ──────────────────────────────────────────────
   Personal Blog — Stylesheet
   Minimal, modern, mobile-first
   ────────────────────────────────────────────── */

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

:root {
  --color-bg: #fafaf9;
  --color-surface: #ffffff;
  --color-text: #1c1917;
  --color-text-secondary: #78716c;
  --color-border: #e7e5e4;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-danger: #dc2626;
  --color-success: #16a34a;
  --color-accent-red: #7f1d1d;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
  --max-width: 720px;
  --max-width-wide: 960px;
  --radius: 6px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --transition: 150ms ease;
}

html {
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

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

main.container {
  flex: 1;
  padding-top: 2rem;
  padding-bottom: 3rem;
}

/* ── Header ───────────────────────────────────── */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  max-width: var(--max-width-wide);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.site-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.site-title:hover {
  color: var(--color-text);
  opacity: 0.8;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
}

.nav-links a.active {
  border-bottom: 2px solid var(--color-text);
  padding-bottom: 2px;
}

.admin-link {
  background: var(--color-text);
  color: #fff !important;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.8rem !important;
}

.admin-link:hover {
  opacity: 0.85;
}

.nav-search input {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  width: 140px;
  transition: all var(--transition);
}

.nav-search input:focus {
  outline: none;
  border-color: var(--color-accent);
  width: 180px;
}

/* Hamburger */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

@media (max-width: 700px) {
  .menu-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.25rem;
    gap: 0.75rem;
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-search input {
    width: 100%;
  }

  .nav-search input:focus {
    width: 100%;
  }
}

/* ── Hero ─────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 3rem 0 2.5rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2.5rem;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.hero-sub {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
}

.author-link {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.post-author {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

/* ── Section Headers ──────────────────────────── */
.page-header {
  padding: 2rem 0 1.5rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
}

.page-header h1 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-accent-red);
}

.page-sub {
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-accent-red);
}

.view-all {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
}

.topic-section {
  margin-bottom: 2.5rem;
}

/* ── Post Cards ───────────────────────────────── */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
}

.post-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.post-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.post-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.3;
  margin: 0.5rem 0;
  letter-spacing: -0.01em;
}

.post-card h3 a {
  color: var(--color-text);
}

.post-card h3 a:hover {
  color: var(--color-accent-red);
}

.post-topic {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.post-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.post-date {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

/* Horizontal cards for lists */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.post-card-horizontal {
  display: flex;
  gap: 1.25rem;
}

.post-card-horizontal .post-card-body {
  flex: 1;
}

/* ── Single Post ──────────────────────────────── */
.single-post {
  max-width: var(--max-width);
}

.post-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.post-header h1 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin: 0.5rem 0 0.75rem;
  color: var(--color-accent-red);
}

.post-content {
  font-size: 1.05rem;
  line-height: 1.8;
}

.post-content h2 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  letter-spacing: -0.02em;
}

.post-content h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
}

.post-content p {
  margin-bottom: 1.25rem;
}

.post-content ul,
.post-content ol {
  margin: 1rem 0 1.25rem 1.5rem;
}

.post-content li {
  margin-bottom: 0.35rem;
}

.post-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 0.5rem 0 0.5rem 1.25rem;
  margin: 1.25rem 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

.post-content pre {
  background: #1e1e1e;
  color: #d4d4d4;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.5;
  margin: 1.25rem 0;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: #f5f5f4;
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

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

.post-content img {
  border-radius: var(--radius);
  margin: 1.25rem 0;
}

/* Share */
.post-share {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-heading);
  font-size: 0.85rem;
}

.post-share span {
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* Post Sources */
.post-sources {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.post-sources h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-text-secondary);
}

.sources-content {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.sources-content ul {
  margin-left: 1.25rem;
  margin-bottom: 0;
}

.sources-content li {
  margin-bottom: 0.25rem;
}

/* ── Comments ─────────────────────────────────── */
.comments-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.comments-section h2 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.comments-empty {
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: 1.5rem;
}

.comment {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}

.comment:last-of-type {
  border-bottom: none;
}

.comment-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.35rem;
}

.comment-author {
  font-family: var(--font-heading);
  font-size: 0.9rem;
}

.comment-date {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.comment-body {
  font-size: 0.95rem;
  line-height: 1.6;
}

.comment-form {
  margin-top: 1.5rem;
}

.comment-form h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* ── Forms ────────────────────────────────────── */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: var(--color-text);
}

.label-hint {
  font-weight: 400;
  color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-group textarea {
  resize: vertical;
  line-height: 1.6;
}

.form-row {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
}

.form-check {
  display: flex;
  align-items: center;
}

.form-check label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  white-space: nowrap;
}

.form-check input[type="checkbox"] {
  width: auto;
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* ── Buttons ──────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--color-text);
  border-radius: var(--radius);
  background: var(--color-text);
  color: #fff;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn:hover {
  background: #333;
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
}

.btn-ghost:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.btn-full {
  width: 100%;
}

.btn-sm {
  padding: 0.3rem 0.7rem;
  font-size: 0.8rem;
}

.btn-danger {
  background: var(--color-danger);
  border-color: var(--color-danger);
}

.btn-danger:hover {
  background: #b91c1c;
  border-color: #b91c1c;
}

/* ── Search Page ──────────────────────────────── */
.search-page-form {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.search-page-form input {
  flex: 1;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.search-page-form input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.search-meta {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

/* ── Footer ───────────────────────────────────── */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 0;
  margin-top: auto;
}

.site-footer .container {
  max-width: var(--max-width-wide);
  text-align: center;
}

.footer-subscribe p {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.subscribe-form {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  max-width: 380px;
  margin: 0 auto 1.5rem;
}

.subscribe-form input {
  flex: 1;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.subscribe-form input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.subscribe-form button {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  background: var(--color-text);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition);
}

.subscribe-form button:hover {
  background: #333;
}

/* Topic Picker */
.topic-picker-form {
  max-width: 400px;
  margin: 1.5rem auto 0;
  text-align: left;
}

.topic-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.topic-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  cursor: pointer;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), background var(--transition);
}

.topic-option:hover {
  border-color: var(--color-accent);
  background: rgba(37, 99, 235, 0.04);
}

.topic-label {
  user-select: none;
}

.footer-copy {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

/* ── Auth Page ────────────────────────────────── */
.auth-page {
  display: flex;
  justify-content: center;
  padding: 3rem 0;
}

.auth-form {
  width: 100%;
  max-width: 360px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
}

.auth-form h1 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  text-align: center;
}

/* ── Admin ────────────────────────────────────── */
.admin-dashboard {
  max-width: var(--max-width-wide);
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.admin-header h1 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
}

.admin-actions {
  display: flex;
  gap: 0.5rem;
}

.admin-table-wrapper {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-heading);
  font-size: 0.9rem;
}

.admin-table th {
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  padding: 0.75rem;
  border-bottom: 2px solid var(--color-border);
}

.admin-table td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.admin-table a {
  color: var(--color-text);
  font-weight: 500;
}

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

.actions-cell {
  display: flex;
  gap: 0.4rem;
}

.status-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.status-badge.published {
  background: #dcfce7;
  color: #166534;
}

.status-badge.draft {
  background: #fef3c7;
  color: #92400e;
}

/* Editor */
.admin-editor {
  max-width: var(--max-width);
}

.admin-editor h1 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.editor-form textarea#content {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ── Alerts ───────────────────────────────────── */
.alert {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.alert-error {
  background: #fef2f2;
  color: var(--color-danger);
  border: 1px solid #fecaca;
}

/* ── Message Pages ────────────────────────────── */
.message-page {
  text-align: center;
  padding: 4rem 0;
}

.message-page h1 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.message-page p {
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
}

.message-page .btn {
  margin-top: 1.5rem;
}

/* ── Empty State ──────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-secondary);
}

/* ── Mobile Overrides ─────────────────────────── */
@media (max-width: 700px) {
  html {
    font-size: 16px;
  }

  .hero {
    padding: 2rem 0;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

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

  .post-card-horizontal {
    flex-direction: column;
  }

  .post-header h1 {
    font-size: 1.6rem;
  }

  .form-row {
    flex-direction: column;
  }

  .search-page-form {
    flex-direction: column;
  }

  .admin-header {
    flex-direction: column;
    align-items: flex-start;
  }
}