/* projects-python.css — extracted from the embedded <style> block in projects/python.html */
  /* ═══════════════════════════════════════
     Python Projects — page styles
     Reuses style.css variables (--bg, --text, --primary, etc.)
     so light/dark toggle works with zero extra JS.
  ═══════════════════════════════════════ */

  .proj-shell {
    display: grid;
    grid-template-columns: 240px 1fr;
    min-height: calc(100dvh - var(--nav-h));
  }

  /* ── SIDEBAR (filters, not chapters) ── */
  .proj-sidebar {
    position: sticky;
    top: var(--nav-h);
    height: calc(100dvh - var(--nav-h));
    overflow-y: auto;
    background: var(--bg);
    border-right: 1px solid var(--border);
    padding: 20px 14px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
  }

  .proj-sb-title {
    font-size: 0.8rem; font-weight: 700; color: var(--text);
    margin-bottom: 14px; padding: 0 6px;
  }

  .proj-filter-group { margin-bottom: 22px; }
  .proj-filter-label {
    font-size: 0.7rem; font-weight: 700; letter-spacing: .04em;
    text-transform: uppercase; color: var(--text-light);
    padding: 0 6px; margin-bottom: 8px;
  }

  .proj-filter-item {
    display: flex; align-items: center; justify-content: space-between;
    width: 100%; padding: 8px 10px; border: none; background: none;
    border-radius: var(--r-sm); font-family: var(--font);
    font-size: 0.82rem; color: var(--text-muted); cursor: pointer;
    text-align: left; transition: background .15s, color .15s;
  }
  .proj-filter-item:hover { background: var(--bg-2); color: var(--text); }
  .proj-filter-item.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
  .proj-filter-count { font-size: 0.72rem; color: var(--text-light); }
  .proj-filter-item.active .proj-filter-count { color: var(--primary); }

  /* Sidebar count badges update live via JS */
  .proj-sb-sub { font-size: 0.74rem; color: var(--text-light); margin: -10px 0 18px; padding: 0 6px; }

  /* ── MAIN ── */
  .proj-main { min-width: 0; padding: 32px 40px 60px; }

  .proj-header-row {
    display: flex; align-items: flex-start; justify-content: space-between;
    gap: 20px; margin-bottom: 6px;
  }
  .proj-title {
    display: flex; align-items: center; gap: 12px;
    font-size: clamp(1.5rem, 2.6vw, 1.9rem); font-weight: 800;
    color: var(--text); letter-spacing: -.02em;
  }
  .proj-title img { width: 36px; height: 36px; }
  .proj-subtitle { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 24px; }

  /* Search */
  .proj-search {
    display: flex; align-items: center; gap: 10px;
    padding: 12px 16px; margin-bottom: 18px;
    background: var(--card); border: 1.5px solid var(--border);
    border-radius: var(--r-full); max-width: 480px;
    box-shadow: var(--shadow-xs);
    transition: border-color .25s ease, box-shadow .25s ease;
  }
  .proj-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(124,92,255,0.14); }
  .proj-search svg.lucide { font-size: 16px; color: var(--text-light); flex-shrink: 0; }
  .proj-search input {
    border: none; outline: none; background: transparent;
    font-family: var(--font); font-size: 0.85rem; color: var(--text); width: 100%;
  }
  .proj-search input::placeholder { color: var(--text-light); }
  .proj-search kbd {
    font-size: 0.7rem; color: var(--text-light); border: 1px solid var(--border);
    border-radius: 4px; padding: 2px 6px; font-family: var(--font); flex-shrink: 0;
  }

  /* Category pills */
  .proj-pills { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; margin-bottom: 24px; }
  .proj-pill {
    flex-shrink: 0; padding: 7px 16px; border-radius: var(--r-full);
    border: 1px solid var(--border); background: var(--card);
    font-size: 0.78rem; font-weight: 600; color: var(--text-muted);
    cursor: pointer; transition: all .2s; white-space: nowrap;
  }
  .proj-pill:hover { border-color: var(--primary); color: var(--primary); }
  .proj-pill.active { background: var(--primary-grad); color: #fff; border-color: transparent; box-shadow: 0 4px 14px rgba(124,92,255,0.3); }

  .proj-result-count { font-size: 0.8rem; color: var(--text-light); margin-bottom: 14px; }

  /* Grid */
  .proj-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
  }

  .proj-card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--r-card); padding: 20px;
    display: flex; flex-direction: column; gap: 10px;
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  }
  .proj-card:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: var(--shadow), var(--shadow-glow);
    border-color: rgba(124,92,255,.3);
  }

  .proj-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
  .proj-card-title { font-size: 0.92rem; font-weight: 700; color: var(--text); line-height: 1.35; }

  .proj-diff {
    font-size: 0.66rem; font-weight: 700; padding: 3px 9px;
    border-radius: var(--r-full); text-transform: uppercase; letter-spacing: .02em;
    flex-shrink: 0; white-space: nowrap;
  }
  .proj-diff.easy     { background: var(--green-light); color: var(--green); }
  .proj-diff.medium   { background: var(--orange-light); color: var(--orange); }
  .proj-diff.advanced { background: var(--red-light); color: var(--red); }

  .proj-card-desc { font-size: 0.82rem; color: var(--text-2); line-height: 1.5; flex: 1; }

  .proj-card-bottom {
    display: flex; align-items: center; justify-content: space-between;
    margin-top: auto; padding-top: 10px; border-top: 1px solid var(--border);
  }
  .proj-card-cat { font-size: 0.72rem; color: var(--text-light); font-weight: 600; }
  .proj-card-actions { display: flex; gap: 6px; }
  .proj-icon-btn {
    display: flex; align-items: center; justify-content: center;
    width: 28px; height: 28px; border-radius: var(--r-sm);
    border: 1px solid var(--border); background: var(--bg);
    color: var(--text-muted); cursor: pointer; transition: all .15s;
  }
  .proj-icon-btn:hover { border-color: var(--primary); color: var(--primary); }
  .proj-icon-btn.bookmarked { color: var(--primary); border-color: var(--primary); background: var(--primary-light); }
  .proj-icon-btn svg.lucide { font-size: 13px; }

  .proj-empty {
    grid-column: 1 / -1;
    text-align: center; padding: 60px 20px; color: var(--text-light);
    font-size: 0.88rem;
  }

  /* Responsive */
  @media (max-width: 980px) {
    .proj-grid { grid-template-columns: repeat(2, 1fr); }
  }
  @media (max-width: 860px) {
    .proj-shell { grid-template-columns: 1fr; }
    .proj-sidebar { display: none; }
    .proj-main { padding: 24px 20px 60px; }
  }
  @media (max-width: 560px) {
    .proj-grid { grid-template-columns: 1fr; }
  }