:root {
    --bg-canvas: #F6F5F2;
    --bg-surface: #FFFFFF;
    --bg-subtle: #EFECE6;
    --ink-primary: #141413;
    --ink-secondary: #575653;
    --ink-muted: #8A8884;
    --border-hairline: #E2DFD9;
    --border-strong: #C8C4BC;
    --accent-blue: #1D4ED8;
    --accent-blue-hover: #1E40AF;
    --verdict-ac-bg: #EAF5EC;
    --verdict-ac-ink: #1B5E20;
    --verdict-ac-border: #A5D6A7;
    --verdict-warn-bg: #FFF8E1;
    --verdict-warn-ink: #E65100;
    --verdict-warn-border: #FFE082;
    --verdict-err-bg: #FDECEA;
    --verdict-err-ink: #B71C1C;
    --verdict-err-border: #EF9A9A;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-pill: 9999px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    background-color: var(--bg-canvas);
    color: var(--ink-primary);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}

/* TOPBAR */
.topbar {
    height: 54px;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-hairline);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.topbar-left, .topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--ink-primary);
}

.brand-mark {
    width: 12px;
    height: 12px;
    background-color: var(--ink-primary);
    border-radius: 3px;
}

.brand-name {
    font-family: var(--font-mono);
    font-size: 13.5px;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.brand-weight-normal {
    font-weight: 400;
    color: var(--ink-secondary);
}

.divider-vertical {
    width: 1px;
    height: 20px;
    background-color: var(--border-hairline);
}

.primary-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link {
    background: transparent;
    border: 1px solid transparent;
    padding: 6px 12px;
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 500;
    color: var(--ink-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s ease;
}

.nav-link:hover {
    color: var(--ink-primary);
    background-color: var(--bg-canvas);
}

.nav-link.active {
    color: var(--ink-primary);
    background-color: var(--bg-subtle);
    border-color: var(--border-hairline);
}

.cluster-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 12px;
    background-color: var(--bg-canvas);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-pill);
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
}

.status-dot.operational {
    background-color: #2E7D32;
}

.status-label {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--ink-secondary);
}

.workspace-submit-wrap {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-primary {
    background-color: var(--accent-blue);
    color: #FFFFFF;
    border: none;
    padding: 7px 14px;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--accent-blue-hover);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.shortcut-hint {
    font-family: var(--font-mono);
    font-size: 10.5px;
    background-color: rgba(255, 255, 255, 0.18);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

/* CATALOG HOME VIEW (FULL SCREEN & INDEPENDENT SCROLLING) */
.catalog-view {
    height: calc(100vh - 54px);
    width: 100vw;
    overflow: hidden;
    background-color: var(--bg-canvas);
}

.catalog-container {
    height: 100%;
    width: 100%;
    padding: 20px 28px 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.catalog-hero {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-hairline);
    margin-bottom: 16px;
    flex-shrink: 0;
}

.catalog-eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--accent-blue);
    display: block;
    margin-bottom: 4px;
}

.catalog-headline {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: -0.025em;
    color: var(--ink-primary);
    margin-bottom: 4px;
}

.catalog-subhead {
    font-size: 13.5px;
    color: var(--ink-secondary);
    max-width: 720px;
}

.catalog-stats-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-lg);
    padding: 12px 18px;
    min-width: 320px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 10px;
}

.stat-cell {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--ink-muted);
    letter-spacing: 0.06em;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 18px;
    font-weight: 600;
    color: var(--ink-primary);
    font-variant-numeric: tabular-nums;
}

.stat-value.stat-ac { color: var(--verdict-ac-ink); }
.stat-value.stat-warn { color: var(--verdict-warn-ink); }

.progress-track {
    height: 6px;
    background-color: var(--bg-subtle);
    border-radius: var(--radius-pill);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--verdict-ac-ink);
    border-radius: var(--radius-pill);
    transition: width 0.3s ease;
}

.catalog-controls-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    flex-shrink: 0;
}

.search-input-wrap {
    flex: 1;
}

.catalog-search-input {
    width: 100%;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    padding: 9px 16px;
    font-family: var(--font-sans);
    font-size: 13.5px;
    color: var(--ink-primary);
    outline: none;
    transition: border-color 0.15s ease;
}

.catalog-search-input:focus {
    border-color: var(--accent-blue);
}

.catalog-body-grid {
    display: grid;
    grid-template-columns: 270px 1fr;
    gap: 24px;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.catalog-sidebar {
    height: 100%;
    min-height: 0;
    overflow-y: auto;
    padding-bottom: 24px;
}

.sidebar-sticky {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-lg);
    padding: 14px;
}

.sidebar-heading {
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 600;
    color: var(--ink-muted);
    letter-spacing: 0.06em;
    display: block;
    padding: 0 8px 10px;
    border-bottom: 1px solid var(--border-hairline);
    margin-bottom: 8px;
}

.topic-nav-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.topic-nav-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 7px 10px;
    border-radius: var(--radius-sm);
    font-size: 12.5px;
    font-weight: 500;
    color: var(--ink-secondary);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.12s ease;
}

.topic-nav-item:hover {
    background-color: var(--bg-canvas);
    color: var(--ink-primary);
}

.topic-nav-count {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-muted);
    font-variant-numeric: tabular-nums;
}

.catalog-sections-container {
    height: 100%;
    min-height: 0;
    overflow-y: auto;
    padding-right: 6px;
    padding-bottom: 40px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.topic-section-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-lg);
    overflow: hidden;
    flex-shrink: 0;
}

.topic-section-header {
    padding: 14px 20px;
    background-color: var(--bg-subtle);
    border-bottom: 1px solid var(--border-hairline);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topic-section-title-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.topic-index-badge {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    color: var(--ink-secondary);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    padding: 2px 7px;
    border-radius: var(--radius-sm);
}

.topic-section-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--ink-primary);
}

.topic-section-progress {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--ink-secondary);
}

.topic-tasks-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
}

.task-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 18px;
    border-bottom: 1px solid var(--border-hairline);
    border-right: 1px solid var(--border-hairline);
    cursor: pointer;
    transition: background-color 0.12s ease;
    text-decoration: none;
    color: inherit;
}

.task-row:nth-child(2n) {
    border-right: none;
}

.task-row:hover {
    background-color: var(--bg-canvas);
}

.task-row-left {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.task-status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1.5px solid var(--border-strong);
    flex-shrink: 0;
}

.task-status-indicator.solved {
    background-color: #2E7D32;
    border-color: #2E7D32;
}

.task-status-indicator.attempted {
    background-color: #E65100;
    border-color: #E65100;
}

.task-code {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--ink-muted);
    flex-shrink: 0;
}

.task-name {
    font-size: 13.5px;
    font-weight: 500;
    color: var(--ink-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.task-row-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.task-meta-pill {
    font-family: var(--font-mono);
    font-size: 10.5px;
    color: var(--ink-muted);
    background-color: var(--bg-canvas);
    border: 1px solid var(--border-hairline);
    padding: 2px 7px;
    border-radius: var(--radius-sm);
}

/* WORKSPACE IDE VIEW */
.workspace-grid {
    height: calc(100vh - 54px);
    display: grid;
    grid-template-columns: 46% 54%;
    overflow: hidden;
}

.pane {
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pane-left {
    background-color: var(--bg-canvas);
    border-right: 1px solid var(--border-hairline);
}

.pane-right {
    background-color: var(--bg-surface);
}

.pane-header {
    height: 46px;
    padding: 0 20px;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-hairline);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.tab-group {
    display: flex;
    align-items: center;
    gap: 16px;
    height: 100%;
}

.tab-btn {
    height: 100%;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 500;
    color: var(--ink-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
}

.tab-btn.active {
    color: var(--ink-primary);
    border-bottom-color: var(--ink-primary);
}

.badge-count {
    font-family: var(--font-mono);
    font-size: 11px;
    background-color: var(--bg-subtle);
    padding: 1px 6px;
    border-radius: var(--radius-pill);
}

.resource-limits {
    display: flex;
    align-items: center;
    gap: 8px;
}

.limit-pill {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-secondary);
    background-color: var(--bg-canvas);
    border: 1px solid var(--border-hairline);
    padding: 3px 9px;
    border-radius: var(--radius-pill);
}

.tab-panel {
    display: none;
    flex: 1;
    overflow-y: auto;
    padding: 24px 28px;
}

.tab-panel.active {
    display: block;
}

.problem-header {
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border-hairline);
    margin-bottom: 20px;
}

.problem-meta-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.problem-category {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--ink-muted);
    text-transform: uppercase;
}

.problem-solve-badge {
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--radius-pill);
    background-color: var(--verdict-ac-bg);
    color: var(--verdict-ac-ink);
    border: 1px solid var(--verdict-ac-border);
}

.problem-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--ink-primary);
    letter-spacing: -0.02em;
}

.spec-section {
    margin-bottom: 22px;
}

.spec-heading {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--ink-secondary);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.spec-body {
    font-size: 14.5px;
    line-height: 1.65;
    color: var(--ink-primary);
}

.spec-grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.spec-body-sm {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    font-size: 13.5px;
    color: var(--ink-secondary);
}

.constraints-list {
    list-style: none;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    font-family: var(--font-mono);
    font-size: 12.5px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.examples-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.example-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.example-col {
    padding: 12px 14px;
}

.example-col:first-child {
    border-right: 1px solid var(--border-hairline);
}

.example-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 10.5px;
    color: var(--ink-muted);
    text-transform: uppercase;
    margin-bottom: 6px;
}

.example-pre {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--ink-primary);
    white-space: pre-wrap;
}

.segmented-control {
    display: flex;
    background-color: var(--bg-canvas);
    border: 1px solid var(--border-hairline);
    padding: 3px;
    border-radius: var(--radius-md);
    gap: 2px;
}

.seg-btn {
    background: transparent;
    border: none;
    padding: 4px 10px;
    font-family: var(--font-sans);
    font-size: 12.5px;
    font-weight: 500;
    color: var(--ink-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.seg-btn.active {
    background-color: var(--bg-surface);
    color: var(--ink-primary);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.toolbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-ghost {
    background-color: var(--bg-canvas);
    border: 1px solid var(--border-hairline);
    padding: 5px 10px;
    border-radius: var(--radius-md);
    font-size: 12px;
    color: var(--ink-secondary);
    cursor: pointer;
}

.btn-ghost:hover {
    color: var(--ink-primary);
    border-color: var(--border-strong);
}

.editor-container {
    flex: 1;
    width: 100%;
    min-height: 0;
}

.telemetry-console {
    height: 220px;
    border-top: 1px solid var(--border-hairline);
    background-color: var(--bg-canvas);
    padding: 14px 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-shrink: 0;
}

.telemetry-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.telemetry-title-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.telemetry-heading {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    color: var(--ink-secondary);
    letter-spacing: 0.06em;
}

.submission-uuid-label {
    font-family: var(--font-mono);
    font-size: 11px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    padding: 2px 8px;
    border-radius: var(--radius-pill);
    color: var(--ink-muted);
}

.telemetry-metrics {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--ink-secondary);
    display: flex;
    gap: 10px;
}

.pipeline-stepper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-pill);
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-muted);
}

.step-item.active {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    font-weight: 600;
}

.step-item.completed {
    border-color: var(--verdict-ac-border);
    background-color: var(--verdict-ac-bg);
    color: var(--verdict-ac-ink);
}

.step-connector {
    flex: 1;
    height: 1px;
    background-color: var(--border-hairline);
}

.verdict-banner {
    flex: 1;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
}

.verdict-banner.state-ac {
    background-color: var(--verdict-ac-bg);
    border-color: var(--verdict-ac-border);
    color: var(--verdict-ac-ink);
}

.verdict-banner.state-warn {
    background-color: var(--verdict-warn-bg);
    border-color: var(--verdict-warn-border);
    color: var(--verdict-warn-ink);
}

.verdict-banner.state-err {
    background-color: var(--verdict-err-bg);
    border-color: var(--verdict-err-border);
    color: var(--verdict-err-ink);
}

.verdict-status-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.verdict-badge {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
}

.verdict-timestamp {
    font-family: var(--font-mono);
    font-size: 11px;
    opacity: 0.75;
}

.verdict-details {
    font-family: var(--font-mono);
    font-size: 12px;
    white-space: pre-wrap;
}

.ledger-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.ledger-table th, .ledger-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border-hairline);
    font-family: var(--font-mono);
    font-size: 12px;
}

.ledger-table th {
    background-color: var(--bg-subtle);
    color: var(--ink-secondary);
    font-size: 11px;
    text-transform: uppercase;
}

.ledger-row {
    cursor: pointer;
}

.ledger-row:hover {
    background-color: var(--bg-canvas);
}