:root {
    --color-primary: #1a365d;
    --color-primary-light: #2a4a7f;
    --color-accent: #3182ce;
    --color-accent-hover: #2b6cb0;
    --color-bg: #f7fafc;
    --color-surface: #ffffff;
    --color-text: #2d3748;
    --color-text-light: #718096;
    --color-muted: #a0aec0;
    --color-border: #e2e8f0;
    --color-row-alt: #f7fafc;
    --color-row-selected: #ebf8ff;
    --color-success: #38a169;
    --radius: 6px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.site-header {
    background: var(--color-primary);
    color: #fff;
    padding: 1.5rem 0;
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.site-logo {
    height: 60px;
    width: 60px;
    max-height: 60px;
    max-width: 60px;
    object-fit: contain;
    flex-shrink: 0;
}

.site-header h1 {
    margin: 0;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.site-header .subtitle {
    margin: 0.25rem 0 0;
    font-size: 0.95rem;
    opacity: 0.85;
}

.site-header a,
.site-footer a {
    color: #fff;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.site-header a:hover,
.site-footer a:hover {
    color: #fff;
    opacity: 0.8;
}

.site-header a:visited,
.site-footer a:visited {
    color: #fff;
}

/* Workflow Steps */
.workflow-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin: 1.5rem 0 1.25rem;
}

.step {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    color: var(--color-muted);
    transition: all 0.2s ease;
}

.step.active {
    border-color: var(--color-accent);
    color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.12);
}

.step.completed {
    border-color: var(--color-success);
    color: var(--color-success);
    background: #f0fff4;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--color-border);
    color: var(--color-text-light);
}

.step.active .step-number {
    background: var(--color-accent);
    color: #fff;
}

.step.completed .step-number {
    background: var(--color-success);
    color: #fff;
}

.step-label {
    font-size: 0.85rem;
    font-weight: 600;
}

.step-arrow {
    width: 32px;
    height: 2px;
    background: var(--color-border);
    flex-shrink: 0;
}

/* Search box */
.search-box {
    position: relative;
    margin-bottom: 1rem;
    width: 100%;
    box-sizing: border-box;
}

.search-box input {
    display: block;
    width: 100%;
    box-sizing: border-box;
    padding: 0.65rem 2rem 0.65rem 2.25rem;
    font-size: 0.9rem;
    line-height: 1.5;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text);
    box-shadow: var(--shadow);
    outline: none;
    transition: border-color 0.2s;
}

.search-box input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.12);
}

.search-box input::placeholder {
    color: var(--color-muted);
}

.search-icon {
    position: absolute;
    left: 0.7rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-muted);
    pointer-events: none;
}

.search-clear {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 1.1rem;
    color: var(--color-muted);
    cursor: pointer;
    padding: 0.2rem 0.4rem;
    line-height: 1;
}

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

/* Filters */
.filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.filter-group {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.75rem;
    box-shadow: var(--shadow);
}

.filter-group h3 {
    margin: 0 0 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
}

.filter-group h3::after {
    content: "\25BE";
    font-size: 0.65rem;
    color: var(--color-muted);
    transition: transform 0.2s;
}

.filter-group.collapsed h3 {
    margin-bottom: 0;
}

.filter-group.collapsed h3::after {
    transform: rotate(-90deg);
}

.filter-group.collapsed .filter-controls,
.filter-group.collapsed .filter-options {
    display: none;
}

.filter-controls {
    display: flex;
    gap: 0.35rem;
    margin-bottom: 0.5rem;
}

.btn-sm {
    padding: 0.15rem 0.5rem;
    font-size: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 3px;
    background: var(--color-bg);
    color: var(--color-text-light);
    cursor: pointer;
}

.btn-sm:hover {
    background: var(--color-border);
}

.filter-options {
    max-height: 250px;
    overflow-y: auto;
}

.filter-option {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.2rem 0;
    font-size: 0.85rem;
    cursor: pointer;
    user-select: none;
}

.filter-option input[type="checkbox"] {
    margin: 0;
    cursor: pointer;
}

.filter-option.unavailable {
    opacity: 0.35;
}

.filter-option .count-badge {
    margin-left: auto;
    font-size: 0.7rem;
    color: var(--color-muted);
}

/* Filter actions */
.filter-actions {
    display: flex;
    justify-content: flex-end;
    margin: -0.75rem 0 1rem;
}

.btn-reset {
    padding: 0.3rem 0.75rem;
    font-size: 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text-light);
    cursor: pointer;
}

.btn-reset:hover {
    background: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-muted);
}

/* Results bar */
.results-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
}

.results-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.results-summary .sep {
    color: var(--color-border);
}

.results-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-secondary {
    padding: 0.4rem 0.85rem;
    font-size: 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
}

.btn-secondary:hover {
    background: var(--color-bg);
}

.btn-primary {
    padding: 0.4rem 1.25rem;
    font-size: 0.85rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    background: var(--color-accent);
    color: #fff;
    cursor: pointer;
}

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

.btn-primary:disabled {
    background: var(--color-muted);
    cursor: not-allowed;
}

/* Results table */
.results-table-wrapper {
    overflow-x: auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

#results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

#results-table thead {
    position: sticky;
    top: 0;
    z-index: 1;
}

#results-table th {
    background: var(--color-primary);
    color: #fff;
    padding: 0.6rem 0.75rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.8rem;
    white-space: nowrap;
}

#results-table th.sortable {
    cursor: pointer;
    user-select: none;
}

#results-table th.sortable:hover {
    background: var(--color-primary-light);
}

.sort-icon {
    display: inline-block;
    width: 0.7em;
    font-size: 0.7rem;
    opacity: 0.4;
    margin-left: 2px;
}

.sort-icon::after {
    content: "\2195";
}

th.sort-asc .sort-icon {
    opacity: 1;
}

th.sort-asc .sort-icon::after {
    content: "\2191";
}

th.sort-desc .sort-icon {
    opacity: 1;
}

th.sort-desc .sort-icon::after {
    content: "\2193";
}

#results-table td {
    padding: 0.45rem 0.75rem;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

#results-table tbody tr:nth-child(even) {
    background: var(--color-row-alt);
}

#results-table tbody tr {
    cursor: pointer;
}

#results-table tbody tr:hover {
    background: #edf2f7;
}

#results-table tbody tr.selected {
    background: var(--color-row-selected);
}

.col-check {
    width: 36px;
    text-align: center;
}

.col-check input[type="checkbox"] {
    cursor: pointer;
}

td.filename {
    max-width: 350px;
    overflow: hidden;
    text-overflow: ellipsis;
    font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", monospace;
    font-size: 0.78rem;
}

.col-size {
    text-align: right;
}

td.size {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* Region badges */
.badge-region {
    display: inline-block;
    padding: 0.1rem 0.5rem;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.4;
    white-space: nowrap;
}

.badge-lupus {
    background: #dbeafe;
    color: #1e40af;
}

.badge-upper-sco {
    background: #d1fae5;
    color: #065f46;
}

.badge-ophiuchus {
    background: #ede9fe;
    color: #5b21b6;
}

.badge-default {
    background: #f1f5f9;
    color: #475569;
}

/* Empty state */
.empty-state {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    text-align: center;
    color: var(--color-text-light);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 2rem;
}

.empty-state.show {
    display: flex;
}

.empty-state-icon {
    color: var(--color-muted);
    margin-bottom: 1rem;
}

.empty-state h3 {
    margin: 0 0 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.empty-state p {
    margin: 0;
    font-size: 0.9rem;
}

.btn-link {
    background: none;
    border: none;
    color: var(--color-accent);
    cursor: pointer;
    font-size: inherit;
    padding: 0;
    text-decoration: underline;
}

.btn-link:hover {
    color: var(--color-accent-hover);
}

/* Footer */
.site-footer {
    background: var(--color-primary);
    color: rgba(255, 255, 255, 0.7);
    padding: 1rem 0;
    text-align: center;
    font-size: 0.8rem;
}

.site-footer p {
    margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
    .filters {
        grid-template-columns: 1fr;
    }

    .results-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .results-summary {
        flex-direction: column;
        gap: 0.25rem;
    }

    .results-summary .sep {
        display: none;
    }

    td.filename {
        max-width: 200px;
    }

    .workflow-steps {
        gap: 0;
    }

    .step {
        padding: 0.4rem 0.6rem;
    }

    .step-label {
        font-size: 0.75rem;
    }

    .step-arrow {
        width: 20px;
    }
}