:root {
        --pri-yellow: #f09a0f;
        --text-blue: #25265e;
        --black: #000000;
        --white: #ffffff;
        --header-bor-bottom: #f4f4f4;
        --header-border: rgba(246, 246, 246, 0.4);
        --gl-card-bg: #ffffff;
        --gl-card-border: #e5e7eb;
        --gl-card-shadow: rgba(0, 0, 0, 0.04);
        --gl-hero-bg: linear-gradient(135deg, #fefefe 0%, #f8f9fc 100%);
        --gl-search-bg: #f8f9fb;
        --gl-letter-bg: #f3f4f6;
        --gl-letter-active: #f09a0f;
        --gl-tag-core: #fef3c7;
        --gl-tag-core-text: #92400e;
        --gl-tag-async: #d1fae5;
        --gl-tag-async-text: #065f46;
        --gl-tag-scope: #dbeafe;
        --gl-tag-scope-text: #1e40af;
        --gl-tag-memory: #ede9fe;
        --gl-tag-memory-text: #5b21b6;
        --gl-tag-dom: #fce7f3;
        --gl-tag-dom-text: #9d174d;
        --gl-tag-types: #e0e7ff;
        --gl-tag-types-text: #3730a3;
        --gl-tag-functions: #ccfbf1;
        --gl-tag-functions-text: #115e59;
      }
      .dark-theme { background-color: #121225; }
      body.dark-theme {
        --text-blue: #ffffff;
        --black: #eeeeee;
        --white: #121225;
        --header-bor-bottom: #0d0d1e;
        --header-border: rgb(49, 49, 49);
        --gl-card-bg: #1a1a2e;
        --gl-card-border: #2a2a3e;
        --gl-card-shadow: rgba(0, 0, 0, 0.2);
        --gl-hero-bg: linear-gradient(135deg, #121225 0%, #1a1a2e 100%);
        --gl-search-bg: #1e1e30;
        --gl-letter-bg: #252540;
      }
      *, *::before, *::after { padding: 0; margin: 0; box-sizing: border-box; }
      body { background-color: #f8f9fb; }
      body.dark-theme { background-color: #121225; }

      .header {
        top: 0;
        width: 100%;
        background-color: var(--white) !important;
        z-index: 999;
        border-bottom: 1px solid var(--header-bor-bottom);
        position: sticky;
      }
      .header-border { border-bottom: 2px solid var(--header-border); }

      /* Hero Section */
      .gl-hero {
        background: var(--gl-hero-bg);
        padding: 48px 0 40px;
        text-align: center;
        border-bottom: 1px solid var(--gl-card-border);
      }
      .gl-hero__icon {
        width: 64px;
        height: 64px;
        background: linear-gradient(135deg, #f09a0f 0%, #e72c83 100%);
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 20px;
        font-size: 28px;
        color: #fff;
        box-shadow: 0 8px 24px rgba(240, 154, 15, 0.25);
      }
      .gl-hero__title {
        font-size: clamp(1.8rem, 4vw, 2.5rem);
        font-weight: 800;
        color: var(--text-blue);
        margin-bottom: 12px;
        letter-spacing: -0.02em;
      }
      .gl-hero__subtitle {
        font-size: 1.05rem;
        color: var(--black);
        opacity: 0.7;
        max-width: 560px;
        margin: 0 auto 24px;
        line-height: 1.6;
      }
      .gl-hero__stats {
        display: flex;
        justify-content: center;
        gap: 32px;
        flex-wrap: wrap;
      }
      .gl-hero__stat {
        text-align: center;
      }
      .gl-hero__stat-num {
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--pri-yellow);
      }
      .gl-hero__stat-label {
        font-size: 0.8rem;
        color: var(--black);
        opacity: 0.6;
        text-transform: uppercase;
        letter-spacing: 0.05em;
      }

      /* Search & Filter */
      .gl-controls {
        background: var(--white);
        border-bottom: 1px solid var(--gl-card-border);
        padding: 16px 0;
        position: sticky;
        top: 60px;
        z-index: 100;
      }
      .gl-search-wrap {
        max-width: 480px;
        margin: 0 auto 16px;
        position: relative;
      }
      .gl-search-input {
        width: 100%;
        padding: 12px 16px 12px 44px;
        border: 2px solid var(--gl-card-border);
        border-radius: 12px;
        font-size: 0.95rem;
        background: var(--gl-search-bg);
        color: var(--black);
        transition: border-color 0.2s, box-shadow 0.2s;
      }
      .gl-search-input:focus {
        outline: none;
        border-color: var(--pri-yellow);
        box-shadow: 0 0 0 3px rgba(240, 154, 15, 0.1);
      }
      .gl-search-input::placeholder { color: #999; }
      .gl-search-icon {
        position: absolute;
        left: 16px;
        top: 50%;
        transform: translateY(-50%);
        color: #999;
        font-size: 14px;
      }

      /* Alphabet Navigation */
      .gl-alphabet {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 6px;
      }
      .gl-letter {
        width: 34px;
        height: 34px;
        border: none;
        border-radius: 8px;
        background: var(--gl-letter-bg);
        color: var(--black);
        font-size: 0.85rem;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.15s;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      .gl-letter:hover {
        background: var(--pri-yellow);
        color: #fff;
        transform: translateY(-1px);
      }
      .gl-letter.active {
        background: var(--pri-yellow);
        color: #fff;
        box-shadow: 0 2px 8px rgba(240, 154, 15, 0.3);
      }
      .gl-letter.disabled {
        opacity: 0.3;
        cursor: not-allowed;
      }
      .gl-letter.disabled:hover {
        background: var(--gl-letter-bg);
        color: var(--black);
        transform: none;
      }

      /* Terms Grid */
      .gl-content {
        padding: 32px 0 60px;
      }
      .gl-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
        gap: 20px;
      }
      @media (max-width: 400px) {
        .gl-grid { grid-template-columns: 1fr; }
      }

      /* Term Card */
      .gl-card {
        background: var(--gl-card-bg);
        border: 1px solid var(--gl-card-border);
        border-radius: 14px;
        padding: 22px 24px;
        transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
        cursor: pointer;
        position: relative;
        display: flex;
        flex-direction: column;
      }
      .gl-card:hover {
        transform: translateY(-3px);
        box-shadow: 0 8px 24px var(--gl-card-shadow);
        border-color: var(--pri-yellow);
      }
      .gl-card__header {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        margin-bottom: 12px;
      }
      .gl-card__icon {
        width: 40px;
        height: 40px;
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        flex-shrink: 0;
      }
      .gl-card__icon.core { background: var(--gl-tag-core); color: var(--gl-tag-core-text); }
      .gl-card__icon.async { background: var(--gl-tag-async); color: var(--gl-tag-async-text); }
      .gl-card__icon.scope { background: var(--gl-tag-scope); color: var(--gl-tag-scope-text); }
      .gl-card__icon.memory { background: var(--gl-tag-memory); color: var(--gl-tag-memory-text); }
      .gl-card__icon.dom { background: var(--gl-tag-dom); color: var(--gl-tag-dom-text); }
      .gl-card__icon.types { background: var(--gl-tag-types); color: var(--gl-tag-types-text); }
      .gl-card__icon.functions { background: var(--gl-tag-functions); color: var(--gl-tag-functions-text); }

      .gl-card__title-wrap { flex: 1; }
      .gl-card__title {
        font-size: 1.1rem;
        font-weight: 700;
        color: var(--text-blue);
        margin: 0 0 4px;
        line-height: 1.3;
      }
      .gl-card__tag {
        display: inline-block;
        font-size: 0.68rem;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.04em;
        padding: 2px 8px;
        border-radius: 4px;
      }
      .gl-card__tag.core { background: var(--gl-tag-core); color: var(--gl-tag-core-text); }
      .gl-card__tag.async { background: var(--gl-tag-async); color: var(--gl-tag-async-text); }
      .gl-card__tag.scope { background: var(--gl-tag-scope); color: var(--gl-tag-scope-text); }
      .gl-card__tag.memory { background: var(--gl-tag-memory); color: var(--gl-tag-memory-text); }
      .gl-card__tag.dom { background: var(--gl-tag-dom); color: var(--gl-tag-dom-text); }
      .gl-card__tag.types { background: var(--gl-tag-types); color: var(--gl-tag-types-text); }
      .gl-card__tag.functions { background: var(--gl-tag-functions); color: var(--gl-tag-functions-text); }

      .gl-card__desc {
        font-size: 0.9rem;
        color: var(--black);
        opacity: 0.75;
        line-height: 1.6;
        flex: 1;
      }
      .gl-card__link {
        margin-top: 14px;
        font-size: 0.82rem;
        font-weight: 600;
        color: var(--pri-yellow);
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 4px;
        transition: gap 0.15s;
      }
      .gl-card__link:hover { gap: 8px; }
      .gl-card__link i { font-size: 10px; }

      /* Letter Group Header */
      .gl-letter-group {
        margin-top: 40px;
        margin-bottom: 16px;
        display: flex;
        align-items: center;
        gap: 12px;
      }
      .gl-letter-group:first-child { margin-top: 0; }
      .gl-letter-badge {
        width: 44px;
        height: 44px;
        background: linear-gradient(135deg, #f09a0f 0%, #e72c83 100%);
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.3rem;
        font-weight: 800;
        color: #fff;
        box-shadow: 0 4px 12px rgba(240, 154, 15, 0.2);
      }
      .gl-letter-line {
        flex: 1;
        height: 2px;
        background: linear-gradient(90deg, var(--gl-card-border) 0%, transparent 100%);
        border-radius: 1px;
      }

      /* No Results */
      .gl-no-results {
        text-align: center;
        padding: 60px 20px;
        color: var(--black);
        opacity: 0.6;
      }
      .gl-no-results i {
        font-size: 48px;
        margin-bottom: 16px;
        opacity: 0.3;
      }
      .gl-no-results p {
        font-size: 1rem;
      }

      /* Hide cards when filtering */
      .gl-card.hidden,
      .gl-letter-group.hidden { display: none; }

      @media (max-width: 768px) {
        .gl-hero { padding: 32px 0 28px; }
        .gl-hero__icon { width: 52px; height: 52px; font-size: 22px; }
        .gl-controls { top: 56px; padding: 12px 0; }
        .gl-letter { width: 30px; height: 30px; font-size: 0.78rem; }
        .gl-content { padding: 24px 0 48px; }
        .gl-card { padding: 18px 20px; }
      }