:root {
    --accent: #72bf44;
    --accent-dark: #599734;
    --ink: #1a1a1a;
    --ink-soft: #5c5c5c;
    --line: #e6e6e6;
    --bg: #fafaf9;
    --card: #ffffff;
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: "Inter", "Segoe UI", system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
  }
  header {
    padding: 32px 64px 32px;
    border-bottom: 1px solid var(--line);
    background: var(--card);
  }
  .header-top {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 24px;
  }
  .site-logo {
    display: block;
    height: 56px;
    width: auto;
    flex: none;
  }
  h1 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0;
    padding-left: 24px;
    border-left: 1px solid var(--line);
    color: var(--ink-soft);
  }
  .filters {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
  }
  .filters label {
    font-size: 14px;
    font-weight: 600;
    color: var(--ink-soft);
    text-transform: uppercase;
    letter-spacing: 0.06em;
  }
  .filters select {
    appearance: none;
    -webkit-appearance: none;
    background: var(--card);
    border: 1.5px solid var(--ink);
    border-radius: 8px;
    padding: 10px 40px 10px 16px;
    font-size: 15px;
    font-family: inherit;
    color: var(--ink);
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%231a1a1a' stroke-width='2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
  }
  .filters select:hover { border-color: var(--accent-dark); }
  .filters select:focus-visible {
    outline: none;
    border-color: var(--accent-dark);
    box-shadow: 0 0 0 3px rgba(183, 209, 42, 0.35);
  }
  .filters .reset {
    background: none;
    border: none;
    font-size: 14px;
    color: var(--ink-soft);
    text-decoration: underline;
    cursor: pointer;
    padding: 10px 4px;
  }
  .filters .reset:hover { color: var(--accent-dark); }
  main {
    padding: 48px 64px 80px;
    max-width: 1280px;
    margin: 0 auto;
  }
  .grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px 48px;
  }
  .category h2 {
    font-size: 22px;
    font-weight: 600;
    margin: 0 0 6px;
    display: inline-block;
    position: relative;
    padding-bottom: 10px;
  }
  .category h2::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
  }
  .category ul {
    list-style: none;
    margin: 18px 0 0;
    padding: 0;
  }
  .category li {
    padding: 0;
    border-bottom: 1px solid var(--line);
    font-size: 15px;
  }
  .category li a {
    display: block;
    padding: 9px 0;
    color: var(--ink);
    text-decoration: none;
    cursor: pointer;
    transition: color 0.15s ease, padding-left 0.15s ease;
  }
  .category li a:hover {
    color: var(--accent-dark);
    padding-left: 4px;
  }
  .category li:last-child { border-bottom: none; }
  .category.hidden { display: none; }
  .category li.hidden { display: none; }
  .empty-state {
    color: var(--ink-soft);
    font-size: 15px;
    padding: 40px 0;
    text-align: center;
    display: none;
  }
  .empty-state.visible { display: block; }
  @media (max-width: 900px) {
    header, main { padding-left: 24px; padding-right: 24px; }
    .grid { grid-template-columns: 1fr; }
  }