:root {
    --bg: #0b0f14;
    --panel: #161b22;
    --text: #e6edf3;
    --muted: #8b949e;
    --accent: #2f81f7;
    --danger: #f85149;
    --success: #2ea043;
    --border: #30363d;
    --input-bg: #0d1117;
}

* { box-sizing: border-box; }

html, body {
    height: 100%;
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
}

/* --- Top Navigation --- */
.topbar {
    padding: 1rem 1.5rem;
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}
.topbar h1 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.2px;
}

/* --- Main Layout --- */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    min-height: calc(100vh - 60px - 60px); /* Approximate height minus header/footer */
}

/* --- Controls Section (Search, Pagination) --- */
.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 6px;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* --- Cards --- */
.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.22);
}
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}
.card-header.slim {
    padding: 0;
    border: none;
}
.parent-details summary {
    list-style: none;
}
.parent-details summary::-webkit-details-marker {
    display: none;
}
.parent-details summary {
    cursor: pointer;
    user-select: none;
}
.parent-details[open] summary .card-header {
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.75rem;
    margin-bottom: 0.75rem;
}
.detail-card summary {
    list-style: none;
}
.detail-card summary::-webkit-details-marker {
    display: none;
}
.detail-card summary {
    cursor: pointer;
    user-select: none;
}
.detail-card[open] summary .card-header {
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.75rem;
    margin-bottom: 0.75rem;
}
.card-header h2 {
    margin: 0;
    font-size: 1.1rem;
}
.card-header h3 {
    margin: 0;
    font-size: 1rem;
}
.muted {
    color: var(--muted);
}
.pill {
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(47, 129, 247, 0.15);
    color: #b3d1ff;
    border: 1px solid var(--border);
    font-weight: 600;
    letter-spacing: 0.3px;
}

/* --- Rule Form --- */
.rule-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}
.field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    font-weight: 600;
}
.field span {
    color: var(--muted);
    font-size: 0.85rem;
}
.field input,
.field textarea {
    width: 100%;
}
.field textarea {
    resize: vertical;
    min-height: 70px;
}
.span-2 {
    grid-column: span 2;
}
.full-row {
    margin-bottom: 0.5rem;
}
.padded-actions {
    padding-top: 0.5rem;
}
.full-width-actions {
    flex-direction: column;
    align-items: stretch;
}
.full-width-btn {
    width: 100%;
    padding: 12px 14px;
    font-size: 1rem;
    font-weight: 600;
}
.form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.parent-card {
    border: 1px solid rgba(47, 129, 247, 0.4);
    background: linear-gradient(145deg, rgba(47, 129, 247, 0.07), rgba(0,0,0,0.35));
}
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1rem;
}
.card-grid.stacked {
    grid-template-columns: 1fr;
}
.sub-card {
    background: rgba(0, 0, 0, 0.25);
    border-color: rgba(255, 255, 255, 0.06);
    box-shadow: none;
}
.sub-card .form-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
.form-grid.two-col {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.sub-card .form-grid.tight {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}
.span-2 {
    grid-column: span 2;
}

/* Search group takes available center space */
.control-group.search {
    flex: 1 1 auto;
    justify-content: center;
    min-width: 200px;
}
#searchInput {
    width: 100%;
    max-width: 400px;
}

/* Right aligned group */
.control-group.right {
    justify-content: flex-end;
}
.pagination-btns {
    display: flex;
    gap: 0.25rem;
}

/* --- Buttons & Inputs --- */
.btn, .form-input, select.form-input {
    padding: 6px 12px;
    border: 1px solid var(--border);
    background: var(--input-bg);
    color: var(--text);
    border-radius: 6px;
    font-size: 0.9rem;
    line-height: 1.5;
    transition: all 0.2s ease;
}
.btn { cursor: pointer; }
.form-input { cursor: text; }
select.form-input { cursor: auto; }
select.form-input {
    padding-right: 2rem; /* Space for dropdown arrow */
}
.form-input:focus, .btn:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(47, 129, 247, 0.3);
}
.btn:hover:not(:disabled) {
    background: var(--border);
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Button Variants */
.btn-primary {
    background: var(--accent);
    color: #fff;
    border: 1px solid var(--accent);
    font-weight: 500;
}
.btn-primary:hover:not(:disabled) {
    background: #58a6ff;
    border-color: #58a6ff;
}
.btn-danger {
    background: var(--danger);
    color: #fff;
    border: 1px solid var(--danger);
}
.btn-danger:hover {
    background: #ff6a6a;
    border-color: #ff6a6a;
}

/* --- Table Styles --- */
.table-wrap {
    width: 100%;
    overflow-x: auto; /* Enables horizontal scroll on mobile */
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--panel);
}

.rules {
    width: 100%;
    border-collapse: collapse;
    white-space: nowrap;
}

.rules th, .rules td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.rules th {
    background: var(--bg);
    font-weight: 600;
    color: var(--muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.rules tbody tr:last-child td {
    border-bottom: none;
}
.rules tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}
.empty {
    text-align: center;
    padding: 3rem;
    color: var(--muted);
}

/* Column specifics for desktop */
@media (min-width: 769px) {
    .col-id { width: 15%; }
    .col-cat { width: 15%; }
    .col-match { width: 60%; }
    .col-actions { width: 10%; text-align: right; }
    .rules td:last-child { text-align: right; }
}

/* --- Footer & Misc --- */
.footer {
    padding: 1.5rem;
    text-align: center;
    color: var(--muted);
    border-top: 1px solid var(--border);
    margin-top: auto;
}
.range {
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    margin-right: 0.5rem;
}
.alerts {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}
.alert.success { border-color: rgba(46, 160, 67, 0.4); background: rgba(46, 160, 67, 0.1); color: #8deaa6; }
.alert.error { border-color: rgba(248, 81, 73, 0.4); background: rgba(248, 81, 73, 0.1); color: #ffb4aa; }
.alert.info { border-color: rgba(47, 129, 247, 0.4); background: rgba(47, 129, 247, 0.1); color: #b9d6ff; }

/* --- Dialog (Modal) --- */
dialog {
    background: var(--panel);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}
dialog::backdrop {
    background: rgba(0, 0, 0, 0.6);
}
.dialog-form {
    padding: 1.5rem;
    max-width: 400px;
}
.dialog-form h2 { margin-top: 0; }
.dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* --- MOBILE BREAKPOINT --- */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    .controls {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }
    .control-group {
        width: 100%;
        justify-content: space-between;
    }
    /* Ensure search input takes full width on mobile */
    .control-group.search {
        order: -1; /* Optional: put search first on mobile */
    }
    #searchInput {
        max-width: none;
    }
    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .form-actions {
        flex-direction: column;
        align-items: flex-start;
    }
    .span-2 {
        grid-column: span 1;
    }
    .card-grid {
        grid-template-columns: 1fr;
    }
}