.calculator-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 24px;
    min-height: calc(100vh - 300px);
}

.calculator-panel,
.sidebar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.calculator-panel {
    padding: 32px;
}

.tool-hero {
    margin-top: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.panel-header,
.stream-header,
.race-lane-header,
.lane-config-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.panel-header {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2,
.section-heading h3,
.stream-heading h3 {
    margin-bottom: 4px;
}

.panel-header p,
.section-heading p,
.stream-heading p,
.lane-config-header p,
.race-lane-header p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.panel-actions,
.stream-controls {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.tool-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tool-btn:hover:not(:disabled) {
    background: var(--bg-card);
    border-color: var(--accent-it);
}

.tool-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.tool-btn.primary {
    background: var(--accent-it);
    border-color: var(--accent-it);
    color: var(--bg-primary);
    font-weight: 600;
}

.config-section {
    margin-bottom: 24px;
}

.config-section:last-of-type {
    margin-bottom: 28px;
}

.section-heading {
    margin-bottom: 14px;
}

.controls-grid,
.lane-field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.lane-config-grid,
.race-lanes {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.field,
.lane-config-card,
.stream-section,
.report-section,
.race-lane {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 16px;
}

.field-full,
.lane-field-full {
    grid-column: 1 / -1;
}

.lane-config-card,
.stream-section,
.report-section,
.race-lane {
    padding: 20px;
}

.lane-a {
    border-color: rgba(6, 182, 212, 0.35);
}

.lane-b {
    border-color: rgba(34, 197, 94, 0.28);
}

.lane-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 999px;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 0.875rem;
}

.lane-a-chip {
    background: var(--accent-it-dim);
    color: var(--accent-it);
}

.lane-b-chip {
    background: var(--accent-success-dim);
    color: var(--accent-success);
}

.field-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.field-label {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.field-note,
.field-note-inline {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.number-with-suffix {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
}

.number-input,
.sample-input,
.report-output {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.number-input {
    padding: 12px 14px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
}

.number-input:focus,
.sample-input:focus,
.report-output:focus {
    border-color: var(--accent-it);
    box-shadow: 0 0 0 3px var(--accent-it-dim);
}

.field-suffix {
    padding: 11px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    white-space: nowrap;
}

.sample-preset-toggle,
.burstiness-toggle {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.sample-preset-chip,
.burstiness-chip {
    padding: 10px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sample-preset-chip:hover,
.burstiness-chip:hover {
    border-color: var(--accent-it);
    color: var(--text-primary);
}

.sample-preset-chip.active,
.burstiness-chip.active {
    background: var(--accent-it-dim);
    border-color: var(--accent-it);
    color: var(--accent-it);
}

.text-action {
    padding: 0;
    background: transparent;
    border: none;
    color: var(--accent-it);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    cursor: pointer;
}

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

.sample-input {
    min-height: 180px;
    padding: 16px;
    resize: vertical;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.65;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.stat-card {
    padding: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

.stat-card-label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.stat-card-value {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stream-section {
    margin-bottom: 20px;
}

.status-pill,
.lane-result-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 74px;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    white-space: nowrap;
}

.status-pill.waiting {
    border-color: rgba(234, 179, 8, 0.35);
    background: var(--accent-warning-dim);
    color: var(--accent-warning);
}

.status-pill.running {
    border-color: rgba(6, 182, 212, 0.35);
    background: var(--accent-it-dim);
    color: var(--accent-it);
}

.status-pill.paused {
    border-color: rgba(148, 163, 184, 0.35);
}

.status-pill.done {
    border-color: rgba(34, 197, 94, 0.35);
    background: var(--accent-success-dim);
    color: var(--accent-success);
}

.stream-note {
    margin: 12px 0 16px;
    color: var(--text-muted);
    font-size: 0.75rem;
}

.stream-rail {
    width: 100%;
    height: 10px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 12px;
}

.stream-progress {
    width: 0;
    height: 100%;
    transition: width 0.12s linear;
}

.lane-a-progress {
    background: linear-gradient(90deg, var(--accent-it), #38bdf8);
}

.lane-b-progress {
    background: linear-gradient(90deg, var(--accent-success), #86efac);
}

.stream-meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.stream-output {
    min-height: 260px;
    max-height: 420px;
    overflow: auto;
    padding: 18px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.65;
    white-space: pre-wrap;
    word-break: break-word;
}

.stream-output[data-empty="true"] {
    color: var(--text-muted);
}

.lane-result-pill.ready {
    color: var(--text-secondary);
}

.lane-result-pill.waiting {
    border-color: rgba(234, 179, 8, 0.35);
    background: var(--accent-warning-dim);
    color: var(--accent-warning);
}

.lane-result-pill.leading {
    border-color: rgba(6, 182, 212, 0.35);
    background: var(--accent-it-dim);
    color: var(--accent-it);
}

.lane-result-pill.chasing {
    border-color: rgba(148, 163, 184, 0.35);
    color: var(--text-secondary);
}

.lane-result-pill.paused {
    border-color: rgba(148, 163, 184, 0.35);
    background: rgba(148, 163, 184, 0.12);
    color: var(--text-secondary);
}

.lane-result-pill.finished {
    border-color: rgba(34, 197, 94, 0.35);
    background: var(--accent-success-dim);
    color: var(--accent-success);
}

.lane-result-pill.winner {
    border-color: rgba(34, 197, 94, 0.45);
    background: var(--accent-success-dim);
    color: var(--accent-success);
}

.lane-result-pill.runner-up {
    border-color: rgba(148, 163, 184, 0.35);
    color: var(--text-secondary);
}

.lane-result-pill.tie {
    border-color: rgba(245, 158, 11, 0.35);
    background: var(--accent-warning-dim);
    color: var(--accent-warning);
}

.report-output {
    min-height: 180px;
    padding: 16px;
    resize: vertical;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    line-height: 1.7;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-card {
    padding: 20px;
}

.sidebar-card h3 {
    margin-bottom: 16px;
    font-size: 0.875rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8125rem;
}

.detail-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.detail-label {
    color: var(--text-secondary);
}

.detail-value {
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    text-align: right;
}

.milestone-table {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(80px, 0.9fr) minmax(80px, 0.9fr);
    gap: 8px 12px;
    align-items: center;
}

.milestone-cell {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8125rem;
}

.milestone-cell.header {
    padding-top: 0;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.milestone-cell.label {
    color: var(--text-secondary);
}

.milestone-cell.value {
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    text-align: right;
}

.preset-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.preset-button {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-button:hover {
    border-color: var(--accent-it);
}

.preset-button.active {
    background: var(--accent-it-dim);
    border-color: var(--accent-it);
}

.preset-title {
    color: var(--text-primary);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
}

.preset-description {
    color: var(--text-secondary);
    font-size: 0.75rem;
    line-height: 1.5;
}

.note-card {
    border-left: 4px solid var(--accent-it);
}

.note-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.7;
}

.disclaimer-card {
    border-left: 4px solid rgba(239, 68, 68, 0.75);
}

.attribution-card {
    border-left: 4px solid rgba(148, 163, 184, 0.75);
}

.sidebar-list {
    margin: 0;
    padding-left: 18px;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.65;
}

.sidebar-list li + li {
    margin-top: 10px;
}

.sidebar-link {
    color: var(--accent-it);
    text-decoration: none;
}

.sidebar-link:hover {
    text-decoration: underline;
}

.sidebar-footnote {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.75rem;
    line-height: 1.6;
}

@media (max-width: 1180px) {
    .calculator-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        order: -1;
    }
}

@media (max-width: 960px) {
    .lane-config-grid,
    .race-lanes,
    .stats-grid,
    .controls-grid,
    .lane-field-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .calculator-panel,
    .sidebar-card {
        padding: 18px;
    }

    .panel-header,
    .tool-hero,
    .stream-header,
    .race-lane-header,
    .lane-config-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .milestone-table {
        grid-template-columns: minmax(0, 1fr) minmax(72px, 0.8fr) minmax(72px, 0.8fr);
    }
}