/* ═══════════════════════════════════════════════
   PRACTICEPLANET — Editorial Blog Theme
   Warm amber accent · Playfair Display headings
═══════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;0,900;1,400;1,700&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,600;1,8..60,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Variables ── */
:root {
  --amber:     #f59e0b;
  --amber-dk:  #d97706;
  --amber-lt:  #fde68a;
  --orange:    #ea580c;
  --red-tag:   #dc2626;

  /* Light mode */
  --bg:        #faf8f4;
  --bg2:       #f3efe8;
  --bg3:       #ebe5d9;
  --surface:   #ffffff;
  --border:    #e0d9cc;
  --border2:   #ccc4b4;

  --ink:       #1c1812;
  --ink2:      #3d3629;
  --ink3:      #6b6050;
  --ink4:      #9c8f7e;

  --link:      #92400e;
  --accent:    var(--amber);
  --accent-dk: var(--amber-dk);

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'Source Serif 4', Georgia, serif;
  --font-mono:    'JetBrains Mono', monospace;

  --shadow-sm: 0 1px 3px rgba(28,24,18,0.08);
  --shadow-md: 0 4px 16px rgba(28,24,18,0.10);
  --shadow-lg: 0 8px 32px rgba(28,24,18,0.12);

  --radius:    6px;
  --header-h:  58px;
}

[data-theme="dark"] {
  --bg:       #141210;
  --bg2:      #1c1912;
  --bg3:      #252018;
  --surface:  #1f1c15;
  --border:   #2e2920;
  --border2:  #3d3829;

  --ink:      #f5f0e8;
  --ink2:     #d4cbbe;
  --ink3:     #9e9283;
  --ink4:     #6b6050;

  --link:     #fbbf24;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
}

/* ── Reset ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}

img { max-width: 100%; display: block; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }

/* ════════════════════════════════════════
   HEADER
════════════════════════════════════════ */
.site-header {
  position: sticky; top: 0; z-index: 200;
  background: var(--bg);
  border-bottom: 2px solid var(--ink);
  height: var(--header-h);
}

[data-theme="dark"] .site-header {
  border-bottom-color: var(--amber);
}

.header-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex; align-items: center; gap: 1.25rem;
}

.site-logo {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--ink);
  letter-spacing: -0.03em;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-logo em {
  font-style: italic;
  color: var(--amber-dk);
}

.header-divider {
  width: 1px; height: 24px;
  background: var(--border2);
  flex-shrink: 0;
}

/* Grade tabs */
.grade-tabs {
  display: flex; align-items: center;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
  flex: 1;
  min-width: 0;
}
.grade-tabs::-webkit-scrollbar { display: none; }

.grade-tab {
  padding: 0 1rem;
  height: var(--header-h);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink3);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  white-space: nowrap;
  transition: color 0.18s, border-color 0.18s;
  position: relative;
  top: 2px; /* align border to header border */
}

.grade-tab:hover { color: var(--ink); }
.grade-tab.active {
  color: var(--amber-dk);
  border-bottom-color: var(--amber);
  font-weight: 500;
}

[data-theme="dark"] .grade-tab.active {
  color: var(--amber);
}

/* Header right controls */
.header-controls {
  display: flex; align-items: center; gap: 0.75rem;
  flex-shrink: 0;
  margin-left: auto;
}

.search-form {
  position: relative;
  display: flex; align-items: center;
}

.search-icon {
  position: absolute; left: 0.65rem;
  width: 14px; height: 14px;
  color: var(--ink4);
  pointer-events: none;
  flex-shrink: 0;
}

.search-input {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink);
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.42rem 0.75rem 0.42rem 2rem;
  width: 200px;
  transition: all 0.2s;
}

.search-input::placeholder { color: var(--ink4); }
.search-input:focus {
  outline: none;
  border-color: var(--amber);
  background: var(--surface);
  width: 240px;
  box-shadow: 0 0 0 3px rgba(245,158,11,0.15);
}

/* Theme toggle */
.theme-btn {
  width: 34px; height: 34px;
  border-radius: var(--radius);
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--ink2);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.95rem;
  transition: all 0.2s;
  flex-shrink: 0;
}

.theme-btn:hover {
  background: var(--amber);
  border-color: var(--amber-dk);
  color: #fff;
}

/* Hamburger */
.hamburger {
  display: none;
  width: 34px; height: 34px;
  border-radius: var(--radius);
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--ink);
  align-items: center; justify-content: center;
  font-size: 1.1rem;
}

/* Mobile search (shown below header on small screens) */
.mobile-search-bar {
  display: none;
  padding: 0.6rem 1rem;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
}

.mobile-search-bar .search-input {
  width: 100%;
}

.mobile-search-bar.show { display: block; }

/* Mobile grade drawer */
.mobile-grade-drawer {
  display: none;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.75rem 1rem;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: var(--header-h);
  z-index: 190;
}

.mobile-grade-drawer.open { display: flex; }

.mobile-grade-pill {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--ink3);
  transition: all 0.18s;
}

.mobile-grade-pill.active {
  background: var(--amber);
  border-color: var(--amber-dk);
  color: #1c1812;
  font-weight: 500;
}

/* ════════════════════════════════════════
   LAYOUT SHELL
════════════════════════════════════════ */
.page-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ════════════════════════════════════════
   SUBCAT STRIP (below header on desktop)
════════════════════════════════════════ */
.subcat-strip {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: var(--header-h);
  z-index: 190;
}

.subcat-strip-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 0 1.5rem;
  display: flex; align-items: center; gap: 0.25rem;
  height: 40px;
  overflow-x: auto;
  scrollbar-width: none;
}

.subcat-strip-inner::-webkit-scrollbar { display: none; }

.subcat-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.28rem 0.75rem;
  border-radius: 100px;
  background: none;
  border: 1px solid transparent;
  color: var(--ink4);
  white-space: nowrap;
  transition: all 0.18s;
}

.subcat-btn:hover { color: var(--ink2); border-color: var(--border2); }
.subcat-btn.active {
  background: var(--amber);
  color: #1c1812;
  border-color: var(--amber-dk);
  font-weight: 500;
}

/* ════════════════════════════════════════
   BLOG FEED LAYOUT
════════════════════════════════════════ */
.blog-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 2.5rem;
  padding: 2.5rem 0 4rem;
  align-items: start;
}

/* ── Toolbar ── */
.feed-toolbar {
  display: flex; align-items: center; gap: 0.75rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}

.result-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink4);
  letter-spacing: 0.05em;
  margin-right: auto;
}

.sort-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink4);
}

.sort-select {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  transition: border-color 0.18s;
}

.sort-select:focus { outline: none; border-color: var(--amber); }

/* ── Post Card List ── */
.post-feed { display: flex; flex-direction: column; }

.post-card {
  display: grid;
  grid-template-columns: 1fr 160px;
  gap: 1.25rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.15s;
}

.post-card:first-child { border-top: 1px solid var(--border); }
.post-card:hover .post-title { color: var(--amber-dk); }
[data-theme="dark"] .post-card:hover .post-title { color: var(--amber); }

.post-card-body { display: flex; flex-direction: column; gap: 0.5rem; }

.post-meta-top {
  display: flex; align-items: center; gap: 0.5rem;
  flex-wrap: wrap;
}

.cat-badge {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.18rem 0.55rem;
  border-radius: 3px;
  background: var(--amber);
  color: #1c1812;
  font-weight: 500;
}

.subcat-badge {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.18rem 0.55rem;
  border-radius: 3px;
  background: var(--bg3);
  color: var(--ink3);
  border: 1px solid var(--border2);
}

.post-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink4);
  margin-left: auto;
}

.post-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink);
  transition: color 0.18s;
}

.post-excerpt {
  font-size: 0.9rem;
  color: var(--ink3);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-tags-row {
  display: flex; gap: 0.35rem; flex-wrap: wrap;
  margin-top: 0.25rem;
}

.tag-pill {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  background: var(--bg3);
  color: var(--ink4);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.15s;
}

.tag-pill:hover, .tag-pill.active {
  background: var(--amber-lt);
  color: var(--amber-dk);
  border-color: var(--amber);
}

[data-theme="dark"] .tag-pill:hover,
[data-theme="dark"] .tag-pill.active {
  background: rgba(245,158,11,0.15);
  color: var(--amber);
  border-color: rgba(245,158,11,0.4);
}

.post-card-img {
  width: 160px; height: 110px;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--bg3);
  flex-shrink: 0;
  transition: opacity 0.2s;
}

.post-card:hover .post-card-img { opacity: 0.88; }

/* ── Empty state ── */
.feed-empty {
  padding: 4rem 0;
  text-align: center;
  color: var(--ink4);
}
.feed-empty-icon { font-size: 2rem; margin-bottom: 0.75rem; }
.feed-empty p { font-size: 0.9rem; }

/* ════════════════════════════════════════
   RIGHT SIDEBAR
════════════════════════════════════════ */
.sidebar {
  position: sticky;
  top: calc(var(--header-h) + 40px + 2.5rem);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar-block {
  /* intentional container */
}

.sidebar-heading {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  border-bottom: 2px solid var(--amber);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

/* Recent posts in sidebar */
.sidebar-post {
  display: flex; gap: 0.75rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: opacity 0.15s;
}
.sidebar-post:last-child { border-bottom: none; }
.sidebar-post:hover { opacity: 0.75; }

.sidebar-post-img {
  width: 56px; height: 42px;
  object-fit: cover;
  border-radius: 4px;
  background: var(--bg3);
  flex-shrink: 0;
}

.sidebar-post-title {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink2);
  letter-spacing: -0.01em;
}

.sidebar-post-date {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--ink4);
  margin-top: 0.2rem;
}

/* Tag cloud */
.tag-cloud {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
}

.tag-cloud-pill {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  padding: 0.28rem 0.65rem;
  border-radius: var(--radius);
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--ink3);
  cursor: pointer;
  transition: all 0.18s;
}

.tag-cloud-pill:hover, .tag-cloud-pill.active {
  background: var(--amber);
  border-color: var(--amber-dk);
  color: #1c1812;
}

[data-theme="dark"] .tag-cloud-pill:hover,
[data-theme="dark"] .tag-cloud-pill.active {
  background: rgba(245,158,11,0.2);
  color: var(--amber);
  border-color: rgba(245,158,11,0.5);
}

/* Active filter bar */
.active-filters {
  display: flex; align-items: center; gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
  min-height: 0;
}

.filter-chip {
  display: flex; align-items: center; gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.25rem 0.6rem 0.25rem 0.75rem;
  border-radius: 100px;
  background: rgba(245,158,11,0.15);
  border: 1px solid rgba(245,158,11,0.4);
  color: var(--amber-dk);
}

[data-theme="dark"] .filter-chip { color: var(--amber); }

.filter-chip-remove {
  background: none; border: none;
  color: var(--amber-dk);
  font-size: 0.85rem; line-height: 1;
  padding: 0;
  display: flex; align-items: center;
  transition: color 0.15s;
}

.clear-all-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink4);
  background: none;
  border: none;
  text-decoration: underline;
  text-underline-offset: 2px;
  margin-left: 0.25rem;
  transition: color 0.15s;
}
.clear-all-btn:hover { color: var(--red-tag); }

/* ════════════════════════════════════════
   SINGLE POST VIEW
════════════════════════════════════════ */
#post-view { display: none; }

.post-view-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 2.5rem;
  padding: 2.5rem 0 4rem;
  align-items: start;
}

.back-btn {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink4);
  background: none; border: none;
  margin-bottom: 2rem;
  transition: color 0.18s;
  padding: 0;
}

.back-btn:hover { color: var(--amber-dk); }
.back-arrow { transition: transform 0.18s; }
.back-btn:hover .back-arrow { transform: translateX(-3px); }

.post-header { margin-bottom: 2rem; }

.post-header-meta {
  display: flex; align-items: center; gap: 0.6rem;
  margin-bottom: 1rem; flex-wrap: wrap;
}

.post-header-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 1rem;
}

.post-header-info {
  display: flex; align-items: center; gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink4);
  flex-wrap: wrap;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.post-feat-img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 2.5rem;
  border: 1px solid var(--border);
}

/* Article body */
.article-body {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--ink2);
}

.article-body h1, .article-body h2, .article-body h3,
.article-body h4, .article-body h5, .article-body h6 {
  font-family: var(--font-display);
  color: var(--ink);
  letter-spacing: -0.02em;
  margin: 2.25rem 0 0.75rem;
  line-height: 1.2;
}

.article-body h1 { font-size: 2rem; font-weight: 900; }
.article-body h2 {
  font-size: 1.6rem; font-weight: 700;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}
.article-body h3 { font-size: 1.25rem; font-weight: 700; color: var(--amber-dk); }

[data-theme="dark"] .article-body h3 { color: var(--amber); }

.article-body p { margin-bottom: 1.5rem; }

.article-body ul, .article-body ol {
  margin: 0 0 1.5rem 1.5rem;
}
.article-body li { margin-bottom: 0.5rem; }

.article-body a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-color: rgba(146,64,14,0.35);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.18s;
}
.article-body a:hover { text-decoration-color: var(--link); }

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.87em;
  background: var(--bg3);
  color: var(--orange);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

.article-body pre {
  background: var(--ink);
  border-radius: var(--radius);
  padding: 1.5rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
  border-left: 3px solid var(--amber);
}

[data-theme="dark"] .article-body pre {
  background: #0a0906;
}

.article-body pre code {
  background: none; padding: 0;
  color: var(--bg2); font-size: 0.88rem;
}

.article-body blockquote {
  border-left: 3px solid var(--amber);
  padding: 0.75rem 0 0.75rem 1.5rem;
  margin: 1.75rem 0;
  color: var(--ink3);
  font-style: italic;
  font-size: 1.1rem;
}

.article-body img {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 1.5rem 0;
  border: 1px solid var(--border);
}

/* Post nav */
.post-nav {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.post-nav-card {
  padding: 1rem 1.25rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.18s, background 0.18s;
}
.post-nav-card:hover {
  border-color: var(--amber);
  background: var(--surface);
}
.post-nav-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink4);
  margin-bottom: 0.4rem;
}
.post-nav-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.3;
}

/* ── Spinner ── */
.spinner {
  display: block; margin: 4rem auto;
  width: 32px; height: 32px;
  border: 2px solid var(--border2);
  border-top-color: var(--amber);
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════ */
@media (max-width: 1024px) {
  .blog-layout,
  .post-view-layout {
    grid-template-columns: 1fr 260px;
    gap: 2rem;
  }
}

@media (max-width: 800px) {
  .blog-layout,
  .post-view-layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
    /* Shown as horizontal-scroll strips on mobile */
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  /* Hide full recent posts block on mobile; show tags only */
  .sidebar-recent-full { display: none; }
  .subcat-strip { display: none; }
  .grade-tabs { display: none; }
  .hamburger { display: flex; }
  .search-form { display: none; }
  /* Search bar always visible on mobile */
  .mobile-search-bar { display: block; }
}

@media (max-width: 600px) {
  .post-card {
    grid-template-columns: 1fr;
  }
  .post-card-img { width: 100%; height: 180px; }
  .post-title { font-size: 1.15rem; }
  .blog-layout, .post-view-layout {
    padding: 1.5rem 0 3rem;
  }
  .page-wrap { padding: 0 1rem; }
  .header-inner { padding: 0 1rem; }
  .post-nav { grid-template-columns: 1fr; }
}

/* ── Animations ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.4s ease both; }