:root {
    --bg-primary: #0f172a;
    --bg-card: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.25);
    --border-color: #334155;
    --badge-bg: rgba(56, 189, 248, 0.15);
    --hover-bg: #273549;
    --toast-bg: #38bdf8;
    --toast-text: #0f172a;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --accent: #0284c7;
    --accent-glow: rgba(2, 132, 199, 0.2);
    --border-color: #e2e8f0;
    --badge-bg: rgba(2, 132, 199, 0.1);
    --hover-bg: #f1f5f9;
    --toast-bg: #0284c7;
    --toast-text: #ffffff;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 40px 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header Title */
.top-bar {
    margin-bottom: 25px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 15px;
}

.title-group h1 {
    font-size: 2.3rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.title-group p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 4px;
}

.stats-badge {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stats-badge span {
    color: var(--accent);
    font-weight: 700;
}

/* Search & Filter Section */
.controls-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.search-box {
    position: relative;
    width: 100%;
}

.search-box input {
    width: 100%;
    padding: 12px 45px 12px 18px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
}

.search-box input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.clear-btn {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    display: none;
    padding: 4px;
    border-radius: 50%;
}

.clear-btn:hover {
    color: var(--text-primary);
}

.keyboard-hint {
    position: absolute;
    right: 40px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-card);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    pointer-events: none;
}

.filter-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;
}

.tab-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    white-space: nowrap;
    font-size: 0.85rem;
    font-weight: 600;
}

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

.tab-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
}

/* Main Grid */
.sitemap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.section-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
    font-size: 1.2rem;
    font-weight: 700;
}

.count-badge {
    background: var(--badge-bg);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 12px;
}

.link-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.link-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 8px;
    border-radius: 6px;
}

.link-item:hover {
    background: var(--hover-bg);
}

.link-content {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

/* Links styling */
.link-item a,
.link-item a:visited,
.link-item a:active {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.92rem;
    line-height: 1.4;
    word-break: break-word;
}

.link-item a:hover {
    text-decoration: underline;
}

.link-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 10px;
}

.link-meta {
    font-size: 0.7rem;
    color: var(--text-secondary);
    background: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.copy-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.6;
}

.link-item:hover .copy-btn {
    opacity: 1;
}

.copy-btn:hover {
    color: var(--accent);
    background: var(--bg-primary);
}

/* Toast notification */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--toast-bg);
    color: var(--toast-text);
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    left: 30px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    border-color: var(--accent);
    color: var(--accent);
}

footer {
    margin-top: 50px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    padding-top: 25px;
}

.no-results {
    display: none;
    grid-column: 1 / -1;
    text-align: center;
    padding: 50px 20px;
    color: var(--text-secondary);
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px dashed var(--border-color);
}