/* =============================================
   HR/Payroll Shared Calculator Styles
   Shared base for freelance rate, severance pay,
   and payroll calculators
   ============================================= */

:root {
    /* Local aliases → canonical --calc-* tokens (tokens.css is loaded first) */
    --bg-dark:    var(--calc-bg-page, #050510);
    --bg-card:    rgba(10, 10, 30, 0.92);
    --bg-input:   rgba(0, 0, 0, 0.35);
    --bg-section: rgba(255, 255, 255, 0.03);
    --cyan:       var(--calc-cyan, #22d3ee);
    --purple:     var(--calc-purple, #a855f7);
    --green:      var(--calc-emerald, #34d399);
    --amber:      var(--calc-amber, #f59e0b);
    --red:        var(--calc-rose, #fb7185);
    --text-main:  var(--calc-text-primary, #ffffff);
    --text-dim:   var(--calc-text-faded, #8888aa);
    --text-muted: var(--calc-text-dim, #555570);
    --border:     var(--calc-border-subtle, rgba(255, 255, 255, 0.08));
    --border-inp: var(--calc-border-strong, rgba(255, 255, 255, 0.18));
    --shadow:     var(--calc-shadow-card, 0 8px 32px rgba(0, 0, 0, 0.6));
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    background: var(--calc-bg-page);
    color: var(--calc-text-primary);
    font-family: Inter, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    min-height: 100vh;
}

/* MAIN CONTAINER */
.main-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1rem 4rem;
}
.page-title {
    font-size: 1.7rem;
    font-weight: 800;
    text-align: center;
    background: linear-gradient(135deg, var(--calc-cyan) 0%, var(--purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.4rem;
}
.page-desc {
    text-align: center;
    color: var(--calc-text-dim);
    font-size: 0.88rem;
    margin-bottom: 1.5rem;
}

/* DASHBOARD CARD */
.dashboard-card {
    background: var(--calc-bg-card);
    border: 1px solid var(--calc-border-default);
    border-radius: 16px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

/* MODE TABS */
.tab-control {
    display: flex;
    border-bottom: 1px solid var(--calc-border-default);
    background: rgba(0, 0, 0, 0.2);
}
.tab-btn {
    flex: 1;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--calc-text-dim);
    font-family: Inter, sans-serif;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition:
        color 0.2s,
        border-color 0.2s,
        background 0.2s;
}
.tab-btn:hover {
    color: var(--calc-text-primary);
    background: rgba(255, 255, 255, 0.03);
}
.tab-btn.active {
    color: var(--calc-cyan);
    border-bottom-color: var(--calc-cyan);
    background: rgba(0, 243, 255, 0.05);
}

/* MAIN GRID */
.main-grid {
    display: grid;
    grid-template-columns: 1fr 1.15fr;
}

/* CONTROLS COLUMN */
.controls-column {
    padding: 1.25rem;
    border-right: 1px solid var(--calc-border-default);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 0;
}

/* INSIGHTS COLUMN */
.insights-column {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 0;
}

/* INPUT SECTIONS */
.input-section {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.collapsible-section {
    border: 1px solid var(--calc-border-default);
    border-radius: 10px;
    overflow: hidden;
    background: var(--bg-section);
}
.collapsible-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    padding: 0.6rem 0.8rem;
    list-style: none;
    user-select: none;
}
.collapsible-toggle::-webkit-details-marker {
    display: none;
}
.collapsible-toggle .toggle-arrow {
    font-size: 0.75rem;
    color: var(--calc-text-muted);
    transition: transform 0.2s;
}
details[open] .toggle-arrow {
    transform: rotate(180deg);
}
.section-body {
    padding: 0.75rem 0.8rem 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.section-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--calc-cyan);
}

/* INPUT ROW */
.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
}
.input-row.triple {
    grid-template-columns: 1fr 1fr 1fr;
}
.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}
.input-group label {
    font-size: 0.73rem;
    color: var(--calc-text-dim);
    font-weight: 500;
}

/* CHECKBOXES */
.checkbox-container {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
}
.checkbox-container input[type='checkbox'] {
    accent-color: var(--calc-cyan);
    width: 13px;
    height: 13px;
}
.checkbox-label {
    font-size: 0.72rem;
    color: var(--calc-text-dim);
}

/* PRESET CHIPS */
.chip-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem;
}
.chip-label {
    font-size: 0.7rem;
    color: var(--calc-text-muted);
    white-space: nowrap;
}
.preset-chip {
    padding: 0.2rem 0.55rem;
    border-radius: 20px;
    border: 1px solid var(--border-inp);
    background: transparent;
    color: var(--calc-text-dim);
    font-size: 0.72rem;
    font-family: Inter, sans-serif;
    cursor: pointer;
    transition:
        transform 0.25s ease,
        opacity 0.25s ease,
        color 0.2s ease,
        box-shadow 0.25s ease;
}
.preset-chip:hover {
    border-color: var(--calc-cyan);
    color: var(--calc-cyan);
}
.preset-chip.chip-active {
    background: rgba(0, 243, 255, 0.12);
    border-color: var(--calc-cyan);
    color: var(--calc-cyan);
}

/* PLATFORM CHIPS */
.platform-chips {
    flex-wrap: wrap;
}
.platform-chip {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    padding: 0.3rem 0.6rem;
    border-radius: 8px;
    border: 1px solid var(--border-inp);
    background: transparent;
    color: var(--calc-text-dim);
    font-size: 0.72rem;
    font-weight: 600;
    font-family: Inter, sans-serif;
    cursor: pointer;
    transition:
        transform 0.25s ease,
        opacity 0.25s ease,
        color 0.2s ease,
        box-shadow 0.25s ease;
    white-space: nowrap;
}
.platform-chip .chip-sub {
    font-size: 0.62rem;
    font-weight: 400;
    color: var(--calc-text-muted);
}
.platform-chip:hover {
    border-color: var(--purple);
    color: var(--calc-text-primary);
}
.platform-chip.active {
    background: rgba(188, 19, 254, 0.15);
    border-color: var(--purple);
    color: var(--calc-text-primary);
}
.platform-chip.active .chip-sub {
    color: rgba(188, 19, 254, 0.8);
}

/* LTV EXPANDER */
.ltv-expander {
    border: 1px solid var(--calc-border-default);
    border-radius: 8px;
    overflow: hidden;
}
.ltv-summary {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    list-style: none;
    font-size: 0.75rem;
    color: var(--calc-text-dim);
    font-weight: 600;
    background: var(--bg-section);
}
.ltv-summary::-webkit-details-marker {
    display: none;
}
.ltv-badge {
    background: rgba(0, 243, 255, 0.1);
    color: var(--calc-cyan);
    border-radius: 12px;
    padding: 0.1rem 0.45rem;
    font-size: 0.68rem;
    font-weight: 700;
}
.ltv-desc {
    font-size: 0.73rem;
    color: var(--calc-text-muted);
    margin-bottom: 0.5rem;
}
.ltv-body {
    padding: 0.6rem 0.75rem;
}

/* FORMULA STRIP */
.formula-strip {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--calc-border-default);
    border-radius: 8px;
    padding: 0.6rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}
.fline {
    display: block;
    font-size: 0.72rem;
    color: var(--calc-text-dim);
    font-family: 'Courier New', monospace;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.fs-label {
    color: var(--calc-text-dim);
}
.fs-op {
    color: var(--calc-text-muted);
}
.fv {
    color: var(--calc-cyan);
    font-weight: 600;
}
.fr {
    color: var(--purple);
    font-weight: 700;
}

/* ALERT STACK */
#alert-stack {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}
.alert-msg {
    padding: 0.55rem 0.75rem;
    border-radius: 8px;
    font-size: 0.76rem;
    font-weight: 500;
    animation: alertSlide 0.25s ease;
}
@keyframes alertSlide {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.alert-error {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}
.alert-warning {
    background: rgba(245, 158, 11, 0.12);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fcd34d;
}
.alert-info {
    background: rgba(0, 243, 255, 0.08);
    border: 1px solid rgba(0, 243, 255, 0.2);
    color: var(--calc-cyan);
}

/* HERO BLOCK */
.hero-block {
    text-align: center;
    padding: 0.75rem 0 0.5rem;
}
.hero-label {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--calc-text-muted);
    margin-bottom: 0.25rem;
}
.hero-value {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--calc-cyan);
    line-height: 1;
    transition: color 0.3s;
}
.hero-value.loss {
    color: var(--red);
}
.hero-value.tight {
    color: var(--amber);
}
.hero-value.pulse {
    animation: heroPulse 1.5s ease-in-out infinite;
}
@keyframes heroPulse {
    0%,
    100% {
        text-shadow: 0 0 12px rgba(0, 243, 255, 0.4);
    }
    50% {
        text-shadow: 0 0 28px rgba(0, 243, 255, 0.9);
    }
}
.hero-sub {
    font-size: 0.75rem;
    color: var(--calc-text-dim);
    margin-top: 0.2rem;
    min-height: 1.1em;
}

/* STATS GRID */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}
.stat-cell {
    background: var(--bg-section);
    border: 1px solid var(--calc-border-default);
    border-radius: 8px;
    padding: 0.6rem 0.75rem;
}
.stat-title {
    font-size: 0.68rem;
    color: var(--calc-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-weight: 600;
    margin-bottom: 0.2rem;
}
.stat-value {
    font-size: 0.92rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--calc-text-primary, #f8fafc);
}
.stat-value.green {
    color: var(--green);
}
.stat-value.amber {
    color: var(--amber);
}
.stat-value.red {
    color: var(--red);
}
.stat-value.cyan {
    color: var(--calc-cyan);
}
.stat-value.purple {
    color: var(--purple);
}

@keyframes flashUpdate {
    0% {
        opacity: 1;
    }
    25% {
        opacity: 0.35;
    }
    100% {
        opacity: 1;
    }
}
.flash-update {
    animation: flashUpdate 0.35s ease;
}

/* TOOLTIP */
.tooltip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: var(--calc-text-muted);
    font-size: 0.62rem;
    font-weight: 700;
    cursor: help;
    position: relative;
    vertical-align: middle;
    margin-left: 2px;
}
.tooltip-icon:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(10, 10, 25, 0.97);
    border: 1px solid var(--border-inp);
    color: var(--calc-text-dim);
    font-size: 0.72rem;
    font-weight: 400;
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    white-space: normal;
    max-width: 220px;
    z-index: 20;
    pointer-events: none;
}

/* BENCHMARK SECTION */
.benchmark-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.benchmark-label {
    font-size: 0.7rem;
    color: var(--calc-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.industry-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}
.industry-chip {
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    border: 1px solid var(--border-inp);
    background: transparent;
    color: var(--calc-text-dim);
    font-size: 0.72rem;
    font-family: Inter, sans-serif;
    cursor: pointer;
    transition:
        transform 0.25s ease,
        opacity 0.25s ease,
        color 0.2s ease,
        box-shadow 0.25s ease;
}
.industry-chip:hover {
    border-color: var(--amber);
    color: var(--amber);
}
.industry-chip.active {
    background: rgba(245, 158, 11, 0.12);
    border-color: var(--amber);
    color: var(--amber);
}
.benchmark-bar-wrap {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.benchmark-bar {
    position: relative;
    height: 8px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    overflow: visible;
}
.benchmark-fill {
    height: 100%;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--red), var(--amber), var(--green));
    transition: width 0.4s ease;
    max-width: 100%;
}
.benchmark-avg-line {
    position: absolute;
    top: -3px;
    width: 2px;
    height: 14px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 1px;
    transition: left 0.4s ease;
}
.benchmark-bar-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.65rem;
    color: var(--calc-text-muted);
}

/* GAUGE */
.gauge-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
}
.gauge-wrap svg {
    overflow: visible;
}
.gauge-zones {
    display: flex;
    gap: 1rem;
    font-size: 0.66rem;
}
.zone {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}
.zone::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
}
.zone.red::before {
    background: var(--red);
}
.zone.amber::before {
    background: var(--amber);
}
.zone.green::before {
    background: var(--green);
}
.zone.red {
    color: #fca5a5;
}
.zone.amber {
    color: #fcd34d;
}
.zone.green {
    color: #86efac;
}

/* WATERFALL */
.waterfall-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.waterfall-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--calc-text-muted);
}
.waterfall-bar {
    display: flex;
    height: 32px;
    border-radius: 8px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--calc-border-default);
}
.wf-seg {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: width 0.4s ease;
    overflow: hidden;
    min-width: 0;
}
.wf-seg span {
    font-size: 0.63rem;
    font-weight: 600;
    white-space: nowrap;
    padding: 0 3px;
    pointer-events: none;
}
.wf-cost {
    background: rgba(59, 130, 246, 0.6);
}
.wf-fees {
    background: rgba(188, 19, 254, 0.6);
}
.wf-ship {
    background: rgba(245, 158, 11, 0.6);
}
.wf-fixed {
    background: rgba(251, 146, 60, 0.6);
}
.wf-profit {
    background: rgba(34, 197, 94, 0.6);
}
.wf-profit.loss {
    background: rgba(239, 68, 68, 0.6);
}
.waterfall-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    font-size: 0.68rem;
    color: var(--calc-text-dim);
    width: 100%;
}
.wl-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 2px;
    vertical-align: middle;
    margin-right: 3px;
}
.wl-cost {
    background: rgba(59, 130, 246, 0.85);
}
.wl-fees {
    background: rgba(188, 19, 254, 0.85);
}
.wl-ship {
    background: rgba(245, 158, 11, 0.85);
}
.wl-fixed {
    background: rgba(251, 146, 60, 0.85);
}
.wl-profit {
    background: rgba(34, 197, 94, 0.85);
}

/* CARD FOOTER */
.card-footer {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    border-top: 1px solid var(--calc-border-default);
}
.footer-section {
    padding: 1rem 1.25rem;
}
.footer-section + .footer-section {
    border-left: 1px solid var(--calc-border-default);
}
.footer-label {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--calc-cyan);
    margin-bottom: 0.6rem;
}
.footer-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.6rem;
}

/* BREAK-EVEN */
.breakeven-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.kpi-circle {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 2px solid var(--calc-cyan);
    background: rgba(0, 243, 255, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition:
        border-color 0.3s,
        background 0.3s;
}
.kpi-circle.na {
    border-color: var(--red);
    background: rgba(239, 68, 68, 0.08);
}
.kpi-circle.ok {
    border-color: var(--green);
    background: rgba(34, 197, 94, 0.05);
}
.kpi-value {
    font-size: 0.9rem;
    font-weight: 800;
    line-height: 1;
}
.kpi-unit {
    font-size: 0.58rem;
    color: var(--calc-text-muted);
}
.breakeven-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}
.progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.4s ease;
    background: var(--red);
}
.progress-fill.yellow {
    background: var(--amber);
}
.progress-fill.emerald {
    background: var(--green);
}
.progress-label {
    font-size: 0.72rem;
    color: var(--calc-text-dim);
}

/* RANGE CHIPS */
.range-chips {
    display: flex;
    gap: 0.3rem;
}
.range-chip {
    padding: 0.18rem 0.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-inp);
    background: transparent;
    color: var(--calc-text-dim);
    font-size: 0.68rem;
    font-family: Inter, sans-serif;
    cursor: pointer;
    transition:
        transform 0.25s ease,
        opacity 0.25s ease,
        color 0.2s ease,
        box-shadow 0.25s ease;
}
.range-chip:hover {
    border-color: var(--calc-cyan);
    color: var(--calc-cyan);
}
.range-chip.active {
    background: rgba(0, 243, 255, 0.1);
    border-color: var(--calc-cyan);
    color: var(--calc-cyan);
}

/* SCENARIO TABLE */
.scenario-section {
    min-width: 0;
}
.scenario-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.75rem;
}
.scenario-table th {
    text-align: right;
    color: var(--calc-text-muted);
    font-weight: 600;
    font-size: 0.67rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.2rem 0.4rem;
    border-bottom: 1px solid var(--calc-border-default);
}
.scenario-table th:first-child {
    text-align: left;
}
.scenario-table td {
    padding: 0.3rem 0.4rem;
    text-align: right;
    color: var(--calc-text-dim);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.scenario-table td:first-child {
    text-align: left;
}
.scenario-row--base td {
    color: var(--calc-text-primary);
    font-weight: 600;
    background: rgba(0, 243, 255, 0.04);
}
.scenario-row--base td:first-child {
    border-left: 2px solid var(--calc-cyan);
    padding-left: 0.55rem;
}
.scenario-row--loss td {
    color: #fca5a5;
}
.scenario-row--tight td:not(:first-child) {
    color: #fcd34d;
}
.scenario-row--healthy td:not(:first-child) {
    color: #86efac;
}

/* ACTION BAR */
.action-bar {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--calc-border-default);
    background: rgba(0, 0, 0, 0.15);
    flex-wrap: wrap;
}
.action-btn {
    flex: 1;
    min-width: 100px;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-inp);
    background: rgba(255, 255, 255, 0.04);
    color: var(--calc-text-dim);
    font-family: Inter, sans-serif;
    font-size: 0.76rem;
    font-weight: 600;
    cursor: pointer;
    transition:
        transform 0.25s ease,
        opacity 0.25s ease,
        color 0.2s ease,
        box-shadow 0.25s ease;
    white-space: nowrap;
}
.action-btn:hover {
    border-color: var(--calc-cyan);
    color: var(--calc-cyan);
    background: rgba(0, 243, 255, 0.07);
}
.action-btn--share {
    border-color: rgba(188, 19, 254, 0.4);
}
.action-btn--share:hover {
    border-color: var(--purple);
    color: var(--purple);
    background: rgba(188, 19, 254, 0.07);
}

/* HOW SECTION */
.how-section {
    margin: 2.5rem 0 1.5rem;
}
.how-title {
    text-align: center;
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--calc-text-primary);
    margin-bottom: 1.25rem;
}
.how-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}
.how-card {
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid var(--calc-border-default);
    border-radius: 12px;
    padding: 1.25rem;
    position: relative;
    transition:
        transform 0.3s,
        border-color 0.3s;
}
.how-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 243, 255, 0.25);
}
.how-step {
    font-size: 2.5rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.04);
    position: absolute;
    top: 8px;
    right: 14px;
    line-height: 1;
}
.how-card h3 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
}
.how-card p {
    font-size: 0.8rem;
    color: var(--calc-text-dim);
    line-height: 1.55;
}

/* FAQ */
.faq-section {
    max-width: 760px;
    margin: 1.5rem auto 3rem;
}
.faq-title {
    text-align: center;
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--calc-text-primary);
    margin-bottom: 1rem;
}
.faq-item-enhanced {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--calc-border-default);
    border-radius: 10px;
    margin-bottom: 0.5rem;
    overflow: hidden;
}
.faq-item-enhanced summary {
    padding: 0.85rem 1rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--calc-text-primary);
    transition: background 0.2s;
}
.faq-item-enhanced summary::-webkit-details-marker {
    display: none;
}
.faq-item-enhanced summary:hover {
    background: rgba(255, 255, 255, 0.03);
}
.faq-item-enhanced summary::after {
    content: '+';
    color: var(--calc-text-muted);
    font-size: 1.1rem;
}
.faq-item-enhanced[open] summary::after {
    content: '-';
}
.faq-item-enhanced p {
    padding: 0 1rem 0.85rem;
    font-size: 0.83rem;
    color: var(--calc-text-dim);
    line-height: 1.65;
}

/* RESPONSIVE */
@media (max-width: 900px) {
    .main-grid {
        grid-template-columns: minmax(0, 1fr);
        overflow: hidden;
    }
    .controls-column {
        border-right: none;
        border-bottom: 1px solid var(--calc-border-default);
    }
    .how-grid {
        grid-template-columns: minmax(0, 1fr);
        overflow: hidden;
    }
    .card-footer {
        grid-template-columns: minmax(0, 1fr);
        overflow: hidden;
    }
    .footer-section + .footer-section {
        border-left: none;
        border-top: 1px solid var(--calc-border-default);
    }
    .input-row.triple {
        grid-template-columns: 1fr 1fr;
    }
}
@media (max-width: 600px) {
    .page-title {
        font-size: 1.3rem;
    }
    .hero-value {
        font-size: 1.9rem;
    }
    .tab-btn {
        font-size: 0.72rem;
        padding: 0.6rem 0.5rem;
    }
    .input-row {
        grid-template-columns: minmax(0, 1fr);
        overflow: hidden;
    }
    .input-row.triple {
        grid-template-columns: minmax(0, 1fr);
        overflow: hidden;
    }
    .action-bar {
        flex-direction: column;
    }
    .action-btn {
        flex: none;
        width: 100%;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* ── LIGHT MODE ───────────────────────────────────── */
[data-theme='light'] {
    --amber: #b45309;
    --bg-card: #ffffff;
    --bg-dark: #f1f5f9;
    --bg-input: #e2e8f0;
    --border: rgba(0, 0, 0, 0.15);
    --cyan: #0e7490;
    --green: #059669;
    --purple: #7c3aed;
    --red: #dc2626;
    --text-dim: #334155;
    --text-main: #0f172a;
    --text-muted: #475569;
}

[data-theme='light'] body {
    background-color: #f1f5f9;
    color: #0f172a;
    background-image: none;
}

[data-theme='light'] input,
[data-theme='light'] select {
    color-scheme: light;
}
[data-theme='light'] .dashboard-container,
[data-theme='light'] .dashboard-wrapper {
    background: transparent;
}
[data-theme='light'] .dashboard-panel,
[data-theme='light'] .dashboard-card,
[data-theme='light'] .card,
[data-theme='light'] .glass-card,
[data-theme='light'] .compact-card,
[data-theme='light'] .calculator-card {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.12);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    color: #0f172a;
}
[data-theme='light'] .input-group label,
[data-theme='light'] .input-label {
    color: #334155;
}
[data-theme='light'] .input-group input,
[data-theme='light'] .input-group select,
[data-theme='light'] .glass-input,
[data-theme='light'] .fintech-input,
[data-theme='light'] .dashboard-input,
[data-theme='light'] .styled-input {
    background: #e2e8f0;
    border-color: rgba(0, 0, 0, 0.15);
    color: #0f172a;
}
[data-theme='light'] .tab-btn,
[data-theme='light'] .segment-pill,
[data-theme='light'] .input-tab-btn {
    background: #e2e8f0;
    color: #334155;
    border-color: rgba(0, 0, 0, 0.08);
}
[data-theme='light'] .tab-btn.active,
[data-theme='light'] .segment-pill.active,
[data-theme='light'] .input-tab-btn.active {
    background: #0e7490;
    color: #fff;
}
/* ── CHIPS ── */
.chip {
    padding: 4px 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 20px;
    background: none;
    color: var(--calc-text-dim, #8888aa);
    font-size: 0.78rem;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.chip:hover {
    border-color: #22d3ee;
    color: #22d3ee;
}
.chip.active {
    background: rgba(34, 211, 238, 0.12);
    border-color: #22d3ee;
    color: #22d3ee;
    font-weight: 600;
}
[data-theme='light'] .preset-chip,
[data-theme='light'] .chip {
    background: #e2e8f0;
    color: #334155;
    border-color: rgba(0, 0, 0, 0.08);
}
[data-theme='light'] .preset-chip.active,
[data-theme='light'] .chip.active {
    background: #0e7490;
    color: #fff;
}
[data-theme='light'] .stat-card {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.12);
}
[data-theme='light'] .stat-label {
    color: #475569;
}
[data-theme='light'] .stat-value {
    color: #0f172a;
}
[data-theme='light'] .hero-result,
[data-theme='light'] .hero-result-box,
[data-theme='light'] .result-card {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.12);
    color: #0f172a;
}
[data-theme='light'] .formula-strip,
[data-theme='light'] .formula-pill {
    background: #f1f5f9;
    border-color: rgba(0, 0, 0, 0.08);
    color: #334155;
}
[data-theme='light'] .alert {
    background: #f8fafc;
    border-color: rgba(0, 0, 0, 0.08);
    color: #334155;
}
[data-theme='light'] .action-btn {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.15);
    color: #334155;
}
[data-theme='light'] .action-btn:hover {
    background: #f1f5f9;
}
[data-theme='light'] .chart-card,
[data-theme='light'] .chart-block,
[data-theme='light'] .chart-wrapper {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.12);
}
[data-theme='light'] .scenario-card {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.12);
    color: #0f172a;
}
[data-theme='light'] .compare-card,
[data-theme='light'] .winner-card,
[data-theme='light'] .winner-banner {
    background: #f8fafc;
    border-color: rgba(0, 0, 0, 0.12);
    color: #0f172a;
}
[data-theme='light'] table,
[data-theme='light'] .data-table,
[data-theme='light'] .schedule-table,
[data-theme='light'] .amort-table {
    border-color: rgba(0, 0, 0, 0.12);
}
[data-theme='light'] th {
    background: #f1f5f9;
    color: #334155;
    border-color: rgba(0, 0, 0, 0.12);
}
[data-theme='light'] td {
    color: #0f172a;
    border-color: rgba(0, 0, 0, 0.06);
}
[data-theme='light'] .how-to-card,
[data-theme='light'] .how-it-works,
[data-theme='light'] .onboarding-card-final {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.08);
    color: #0f172a;
}
[data-theme='light'] .faq-item-enhanced {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.08);
}
[data-theme='light'] .faq-question {
    color: #0f172a;
}
[data-theme='light'] .faq-answer {
    color: #475569;
}
[data-theme='light'] .breadcrumb,
[data-theme='light'] .calc-breadcrumb {
    color: #475569;
    background: rgba(0, 0, 0, 0.03);
}
[data-theme='light'] .breadcrumb a {
    color: #475569;
}
[data-theme='light'] .breadcrumb a:hover {
    color: #0e7490;
}
[data-theme='light'] .calc-btn,
[data-theme='light'] .calculate-btn {
    background: #0e7490;
    color: #fff;
}
[data-theme='light'] .toggle-btn {
    background: #e2e8f0;
    color: #334155;
}
[data-theme='light'] .toggle-btn.active {
    background: #0e7490;
    color: #fff;
}
[data-theme='light'] .modal-content,
[data-theme='light'] .modal-body {
    background: #ffffff;
    color: #0f172a;
    border-color: rgba(0, 0, 0, 0.12);
}
[data-theme='light'] .tooltip-label {
    color: #475569;
}
[data-theme='light'] .glossary-card {
    background: #f8fafc;
    border-color: rgba(0, 0, 0, 0.08);
    color: #0f172a;
}
[data-theme='light'] .mobile-nav,
[data-theme='light'] .mobile-sticky-footer {
    background: rgba(255, 255, 255, 0.98);
    border-top: 1px solid rgba(0, 0, 0, 0.12);
}
[data-theme='light'] .mobile-nav .nav-link {
    color: #334155;
}
[data-theme='light'] .back-to-top {
    background: rgba(0, 0, 0, 0.06);
    color: #475569;
}
[data-theme='light'] .sub-category-nav-wrapper,
[data-theme='light'] .sub-nav-link {
    background: transparent;
    color: #334155;
}
[data-theme='light'] .sub-nav-link.active {
    color: #0e7490;
    border-color: #0e7490;
}
[data-theme='light'] .custom-select-trigger,
[data-theme='light'] .glass-select,
[data-theme='light'] .styled-select {
    background: #e2e8f0;
    border-color: rgba(0, 0, 0, 0.15);
    color: #0f172a;
}
[data-theme='light'] .custom-select-options {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.12);
}
[data-theme='light'] .custom-select-option {
    color: #0f172a;
}
[data-theme='light'] .custom-select-option:hover {
    background: #f1f5f9;
}
[data-theme='light'] .controls-panel,
[data-theme='light'] .sidebar,
[data-theme='light'] .results-column {
    background: transparent;
}
[data-theme='light'] .section-title,
[data-theme='light'] .section-header {
    color: #0f172a;
}
[data-theme='light'] .section-subtitle,
[data-theme='light'] .section-desc {
    color: #475569;
}

/* ======= STAT GRID ======= */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin: 10px 0;
}
@media (max-width: 600px) {
    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
.stat-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border, rgba(255, 255, 255, 0.08));
    border-radius: 8px;
    padding: 10px;
    transition:
        transform 0.25s ease,
        opacity 0.25s ease,
        color 0.2s ease,
        box-shadow 0.25s ease;
}
.stat-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}
.stat-label {
    font-size: 0.58rem;
    color: var(--text-muted, #555577);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin-bottom: 3px;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: #0f172a;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb {
    background: #334155;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: #475569;
}
[data-theme='light'] ::-webkit-scrollbar-track {
    background: #e2e8f0;
}
[data-theme='light'] ::-webkit-scrollbar-thumb {
    background: #94a3b8;
}
[data-theme='light'] ::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* --- light-mode auto-fix --- */
[data-theme='light'] .tab-btn:hover {
    background: #edf2f9;
}
[data-theme='light'] .alert-error {
    color: #b91c1c;
}
[data-theme='light'] .alert-warning {
    color: #a16207;
}
[data-theme='light'] .tooltip-icon {
    background: #edf2f9;
}
[data-theme='light'] .benchmark-bar {
    background: #edf2f9;
}
[data-theme='light'] .zone.red {
    color: #b91c1c;
}
[data-theme='light'] .zone.amber {
    color: #a16207;
}
[data-theme='light'] .zone.green {
    color: #15803d;
}
[data-theme='light'] .waterfall-bar {
    background: #edf2f9;
}
[data-theme='light'] .progress-bar {
    background: #edf2f9;
}
[data-theme='light'] .scenario-row--loss td {
    color: #b91c1c;
}
[data-theme='light'] .scenario-row--tight td:not(:first-child) {
    color: #a16207;
}
[data-theme='light'] .scenario-row--healthy td:not(:first-child) {
    color: #15803d;
}
[data-theme='light'] .how-card {
    background: #edf2f9;
}
[data-theme='light'] .faq-item-enhanced summary:hover {
    background: #edf2f9;
}