:root {
    --balance-hour-width: 56px;
    --balance-rate-fallback: #4f7cff;
    --balance-surface: #ffffff;
    --balance-surface-muted: #f8fafc;
    --balance-text: #172033;
    --balance-text-muted: #667085;
    --balance-border: #d7deea;
    --balance-connector: #cbd5e1;
    --balance-covered-opacity: 0.72;
    --balance-warning: #b45309;
    --balance-warning-bg: #fff7ed;
    --balance-free: #b7791f;
    --balance-free-bg: #fffbeb;
    --balance-focus: #2563eb;
    --balance-marker: #66f2ff;
    --balance-marker-alt: #ff4cac;
    --balance-marker-soft: rgba(139, 217, 255, 0.32);
    --balance-series-stroke: #111827;
    --balance-series-stroke-width: 2px;
    --balance-glass-gap: 1px;
    --balance-segment-separator-width: 1px;
    --balance-tooltip-bg: #111827;
    --balance-tooltip-text: #f8fafc;
    --balance-shadow: 0 14px 35px rgba(15, 23, 42, 0.12);
}

.admin-balance-panel,
.admin-balance-timeline-host {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
}

.admin-balance-header.admin-balance-live-header {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
}

.admin-balance-month-navigation {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
}

.admin-balance-month-navigation button {
    min-width: 38px;
    min-height: 38px;
    margin: 0;
}

.admin-balance-month-label {
    min-width: 148px;
    color: var(--balance-text);
    font-size: 14px;
    font-weight: 850;
    text-align: center;
}

.admin-balance-current-month[hidden] {
    display: none;
}

.admin-balance-load-state {
    padding: 14px;
    border: 1px dashed var(--balance-border);
    border-radius: 10px;
    background: var(--balance-surface-muted);
    color: var(--balance-text-muted);
}

.admin-balance-load-state[hidden] {
    display: none;
}

.admin-balance-load-state--error {
    border-color: #fca5a5;
    background: #fef2f2;
    color: #b91c1c;
}

.admin-balance-retry {
    margin: 10px 0 0;
}

.admin-balance-timeline {
    display: grid;
    gap: 14px;
    min-width: 0;
    padding: 16px;
    border: 1px solid var(--balance-border);
    border-radius: 14px;
    background: var(--balance-surface);
    color: var(--balance-text);
    box-shadow: var(--balance-shadow);
}

.admin-balance-timeline__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
}

.admin-balance-timeline__identity {
    min-width: 180px;
}

.admin-balance-timeline__student {
    margin: 0;
    font-size: 18px;
    line-height: 1.25;
}

.admin-balance-timeline__totals {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
    margin: 0;
}

.admin-balance-timeline__total {
    min-width: 112px;
    padding: 7px 9px;
    border: 1px solid var(--balance-border);
    border-radius: 9px;
    background: var(--balance-surface-muted);
}

.admin-balance-timeline__total dt {
    color: var(--balance-text-muted);
    font-size: 11px;
}

.admin-balance-timeline__total dd {
    margin: 2px 0 0;
    font-size: 13px;
    font-weight: 800;
}

.admin-balance-timeline__total--balance {
    min-width: 142px;
}

.admin-balance-timeline__total--balance dd {
    font-size: 18px;
    font-weight: 900;
}

.admin-balance-timeline__total--balance dd[data-balance-sign="balance"] {
    color: #047857;
}

.admin-balance-timeline__total--balance[data-balance-state="debt"] {
    border-color: #ef4444;
    background: #fef2f2;
}

.admin-balance-timeline__total--balance[data-balance-state="debt"] dt,
.admin-balance-timeline__total--balance dd[data-balance-sign="debt"] {
    color: #b91c1c;
}

.admin-balance-timeline__total--debt {
    animation: admin-balance-debt-pulse 2.8s ease-in-out infinite;
}

.admin-balance-timeline__total--debt:hover {
    animation-play-state: paused;
}

@keyframes admin-balance-debt-pulse {
    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.025);
    }
}

.admin-balance-timeline__viewport {
    width: 100%;
    min-width: 0;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 12px 6px 16px;
    scrollbar-gutter: stable;
    overscroll-behavior-inline: contain;
}

.admin-balance-timeline__viewport:focus-visible {
    outline: 2px solid var(--balance-focus);
    outline-offset: 3px;
}

.admin-balance-timeline__rail {
    display: flex;
    align-items: center;
    width: max-content;
    min-width: 100%;
    min-height: 44px;
}

.admin-balance-timeline__segment {
    --balance-rate-color: var(--balance-rate-fallback);
    --balance-covered-ratio: 0;
    --balance-duration-units: 1;
    position: relative;
    isolation: isolate;
    flex: 0 0 calc(
        var(--balance-hour-width) * var(--balance-duration-units)
    );
    width: calc(
        var(--balance-hour-width) * var(--balance-duration-units)
    );
    min-width: calc(
        var(--balance-hour-width) * var(--balance-duration-units)
    );
    height: 28px;
    box-sizing: border-box;
    overflow: visible;
    border: 2px solid var(--balance-rate-color);
    border-radius: 14px;
    background:
        linear-gradient(
            color-mix(in srgb, var(--balance-rate-color) 13%, transparent),
            color-mix(in srgb, var(--balance-rate-color) 13%, transparent)
        ),
        var(--balance-surface);
    color: var(--balance-text);
    cursor: default;
}

/* Completed charges keep their existing chronological connector. */
.admin-balance-timeline__rail > .admin-balance-timeline__segment
    + .admin-balance-timeline__segment {
    margin-left: 5px;
}

.admin-balance-timeline__rail > .admin-balance-timeline__segment
    + .admin-balance-timeline__segment::before,
.admin-balance-timeline__segment + .admin-balance-timeline__segment::before {
    content: "";
    position: absolute;
    z-index: -1;
    top: 50%;
    right: 100%;
    width: 7px;
    height: 12px;
    transform: translateY(-50%);
    background: var(--balance-connector);
}

.admin-balance-timeline__segment--completed {
    border-style: solid;
}

.admin-balance-timeline__segment--projected {
    border-style: dashed;
}

.admin-balance-timeline__projected-outline {
    position: absolute;
    z-index: 3;
    display: block;
    top: 8px;
    left: 0;
    width: 100%;
    height: 28px;
    overflow: visible;
    pointer-events: none;
}

.admin-balance-timeline__projected-series {
    position: relative;
    display: flex;
    flex: 0 0 auto;
    align-items: stretch;
    height: 44px;
    color: #111827;
    --balance-series-stroke-width: 2px;
    --balance-series-glass-gap: 1px;
}

.admin-balance-timeline__series-outline {
    fill: none;
    stroke: var(--balance-series-stroke);
    stroke-width: var(--balance-series-stroke-width);
    stroke-linecap: round;
    stroke-linejoin: round;
    pointer-events: none;
    vector-effect: non-scaling-stroke;
}

.admin-balance-timeline__series-outline--completed {
    stroke-dasharray: none;
}

.admin-balance-timeline__series-outline--projected {
    stroke-dasharray: 7 5;
}

.admin-balance-timeline__series-fill,
.admin-balance-timeline__series-fill-rect {
    pointer-events: none;
}

.admin-balance-timeline__series-fill-rect {
    fill: var(--balance-rate-color);
    opacity: var(--balance-covered-opacity);
}

.admin-balance-timeline__series-fill-rect--partial {
    stroke: color-mix(
        in srgb,
        var(--balance-rate-color) 50%,
        transparent
    );
    stroke-width: 1px;
    vector-effect: non-scaling-stroke;
}

.admin-balance-timeline__projected-series
    .admin-balance-timeline__segment {
    z-index: 1;
    height: 44px;
    overflow: visible;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: transparent;
    cursor: help;
}

.admin-balance-timeline__projected-series
    .admin-balance-timeline__segment
    + .admin-balance-timeline__segment {
    margin-left: 0;
}

.admin-balance-timeline__projected-series
    .admin-balance-timeline__segment::before {
    content: none;
}

.admin-balance-timeline__projected-series
    .admin-balance-timeline__segment:focus-visible {
    z-index: 4;
    outline: 3px solid var(--balance-focus);
    outline-offset: -5px;
    border-radius: 9px;
}

.admin-balance-timeline__projected-series
    .admin-balance-timeline__segment-content {
    display: none;
}

.admin-balance-timeline__fill {
    position: absolute;
    z-index: 0;
    inset: 4px;
    border-radius: 8px;
    box-sizing: border-box;
    border: 0;
    background: var(--balance-rate-color);
    opacity: var(--balance-covered-opacity);
    transform: scaleX(var(--balance-covered-ratio));
    transform-origin: left center;
    pointer-events: none;
}

.admin-balance-timeline__segment--projected .admin-balance-timeline__fill {
    inset: 12px 4px;
    border-radius: 8px;
    background: var(--balance-rate-color);
    opacity: 1;
}

.admin-balance-timeline__projected-series
    .admin-balance-timeline__segment .admin-balance-timeline__fill {
    display: none;
}

.admin-balance-timeline__projected-series .admin-balance-timeline__segment--free,
.admin-balance-timeline__projected-series .admin-balance-timeline__segment--pricing-unassigned,
.admin-balance-timeline__projected-series .admin-balance-timeline__segment--pricing-unresolved,
.admin-balance-timeline__projected-series .admin-balance-timeline__segment--coverage-indeterminate {
    background: transparent;
}

.admin-balance-timeline__segment--coverage-partial .admin-balance-timeline__fill {
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--balance-rate-color) 50%, transparent);
}

.admin-balance-timeline__segment--free {
    border-color: var(--balance-free);
    background: repeating-linear-gradient(
        135deg,
        var(--balance-free-bg) 0 8px,
        color-mix(in srgb, var(--balance-free) 24%, var(--balance-free-bg)) 8px 14px
    );
}

.admin-balance-timeline__action-menu {
    position: fixed;
    z-index: 10001;
    display: grid;
    min-width: 190px;
    max-width: min(320px, calc(100vw - 16px));
    gap: 8px;
    padding: 9px;
    border: 1px solid var(--balance-border);
    border-radius: 10px;
    background: var(--balance-surface);
    box-shadow: var(--balance-shadow);
    color: var(--balance-text);
}

.admin-balance-timeline__action-menu[hidden] {
    display: none;
}

.admin-balance-timeline__action-reason {
    color: var(--balance-text-muted);
    font-size: 12px;
    overflow-wrap: anywhere;
}

.admin-balance-timeline__action-button {
    padding: 8px 10px;
    border: 1px solid var(--balance-free);
    border-radius: 8px;
    background: var(--balance-free-bg);
    color: var(--balance-text);
    cursor: pointer;
    font: inherit;
    font-weight: 800;
    text-align: left;
}

.admin-balance-timeline__action-button:focus-visible {
    outline: 3px solid var(--balance-focus);
    outline-offset: 2px;
}

.admin-balance-timeline__segment--pricing-unassigned,
.admin-balance-timeline__segment--pricing-unresolved,
.admin-balance-timeline__segment--coverage-indeterminate {
    border-color: var(--balance-warning);
    background:
        repeating-linear-gradient(
            135deg,
            transparent 0 6px,
            color-mix(in srgb, var(--balance-warning) 13%, transparent) 6px 10px
        ),
        var(--balance-warning-bg);
}

.admin-balance-timeline__projected-series
    .admin-balance-timeline__segment--pricing-unassigned,
.admin-balance-timeline__projected-series
    .admin-balance-timeline__segment--pricing-unresolved,
.admin-balance-timeline__projected-series
    .admin-balance-timeline__segment--coverage-indeterminate,
.admin-balance-timeline__projected-series
    .admin-balance-timeline__segment--free {
    background: transparent;
}

.admin-balance-timeline__segment:focus-visible {
    z-index: 4;
    outline: 3px solid var(--balance-focus);
    outline-offset: 3px;
}

.admin-balance-timeline__segment-content {
    position: relative;
    z-index: 1;
    display: none;
    align-content: center;
    height: 100%;
    padding: 3px 7px;
    box-sizing: border-box;
    overflow: hidden;
    text-align: center;
}

.admin-balance-timeline__segment-time,
.admin-balance-timeline__segment-amount {
    overflow: hidden;
    font-size: 10px;
    font-weight: 800;
    line-height: 1.25;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.admin-balance-timeline__state-badge {
    position: absolute;
    overflow: hidden;
    width: 1px;
    height: 1px;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
}

.admin-balance-timeline__gift {
    position: absolute;
    top: 2px;
    right: 4px;
    font-size: 13px;
}

.admin-balance-timeline__marker-layer {
    position: absolute;
    z-index: 5;
    inset: 0;
    pointer-events: none;
}

.admin-balance-timeline__payment-marker {
    position: absolute;
    top: 6px;
    bottom: 6px;
    left: var(--balance-marker-offset);
    width: 1px;
    min-width: 1px;
    transform: translateX(-50%);
    border-radius: 999px;
    padding: 0;
    border: 0;
    background: linear-gradient(
        180deg,
        transparent 14%,
        var(--balance-marker-soft) 32%,
        var(--balance-marker-alt) 50%,
        var(--balance-marker-soft) 68%,
        transparent 86%
    );
    box-shadow: none;
    pointer-events: auto;
    cursor: help;
}

.admin-balance-timeline__payment-marker:focus-visible {
    outline: 3px solid var(--balance-focus);
    outline-offset: 3px;
}

.admin-balance-timeline__empty {
    padding: 20px;
    border: 1px dashed var(--balance-border);
    border-radius: 10px;
    color: var(--balance-text-muted);
    text-align: center;
}

.admin-balance-timeline__warnings {
    display: grid;
    gap: 4px;
    margin: 0;
    padding-left: 20px;
    color: var(--balance-warning);
    font-size: 12px;
}

.admin-balance-timeline__tooltip {
    position: fixed;
    z-index: 10000;
    width: max-content;
    max-width: min(320px, calc(100vw - 16px));
    padding: 10px 11px;
    border-radius: 9px;
    background: var(--balance-tooltip-bg);
    color: var(--balance-tooltip-text);
    box-shadow: var(--balance-shadow);
    font-size: 12px;
    line-height: 1.35;
    pointer-events: none;
}

.admin-balance-timeline__tooltip-title {
    margin-bottom: 6px;
    font-weight: 900;
}

.admin-balance-timeline__tooltip-row {
    display: grid;
    grid-template-columns: minmax(84px, auto) minmax(0, 1fr);
    gap: 9px;
}

.admin-balance-timeline__tooltip-label {
    color: #cbd5e1;
}

.admin-balance-timeline__tooltip-value {
    min-width: 0;
    text-align: right;
    overflow-wrap: anywhere;
}

.admin-balance-timeline__coverage {
    margin: 0 0 16px;
    padding: 14px 16px;
    border: 1px solid var(--balance-warning);
    border-radius: 12px;
    background: var(--balance-warning-bg);
    color: var(--balance-text);
}

.admin-balance-timeline__coverage-title,
.admin-balance-timeline__coverage p {
    margin: 0;
}

.admin-balance-timeline__coverage-title {
    margin-bottom: 6px;
    font-size: 1rem;
}

.admin-balance-timeline__coverage-lead {
    font-weight: 800;
}

.admin-balance-timeline__coverage-status,
.admin-balance-timeline__coverage-counts {
    margin-top: 4px !important;
}

.admin-balance-timeline__coverage-warning {
    margin-top: 8px !important;
    font-weight: 800;
    color: #9a3412;
}



.admin-balance-timeline__projected-series
    .admin-balance-timeline__payment-marker {
    top: 12px;
    bottom: 12px;
}

.admin-balance-timeline__tooltip-divider {
    height: 1px;
    margin: 8px 0 7px;
    background: color-mix(in srgb, var(--balance-tooltip-text) 24%, transparent);
}

.admin-balance-timeline__tooltip-section-title {
    margin-bottom: 5px;
    font-weight: 900;
}

.admin-balance-timeline__tooltip--flip-x {
    transform-origin: right top;
}

.admin-balance-timeline__tooltip--flip-y {
    transform-origin: left bottom;
}

@media (max-width: 1400px) {
    :root {
        --balance-hour-width: 48px;
    }

    .admin-balance-timeline__header {
        align-items: stretch;
        flex-direction: column;
    }

    .admin-balance-timeline__totals {
        justify-content: flex-start;
    }

    .admin-balance-header.admin-balance-live-header {
        align-items: stretch;
        flex-direction: column;
    }

    .admin-balance-month-navigation {
        justify-content: flex-start;
    }
}

@media (min-width: 1800px) {
    :root {
        --balance-hour-width: 64px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .admin-balance-timeline *,
    .admin-balance-timeline__tooltip {
        animation: none;
        scroll-behavior: auto;
        transition: none;
    }
}

@media (prefers-color-scheme: dark) {
:root {
        --balance-rate-fallback: #66f2ff;
        --balance-surface: #111827;
        --balance-surface-muted: #1f2937;
        --balance-text: #f8fafc;
        --balance-text-muted: #cbd5e1;
        --balance-border: #475569;
        --balance-connector: #64748b;
        --balance-covered-opacity: 0.58;
        --balance-warning: #fbbf24;
        --balance-warning-bg: #292014;
        --balance-free: #fbbf24;
        --balance-free-bg: #292014;
        --balance-focus: #60a5fa;
        --balance-marker: #66f2ff;
        --balance-marker-alt: #ff4cac;
        --balance-marker-soft: rgba(139, 217, 255, 0.28);
        --balance-tooltip-bg: #f8fafc;
        --balance-tooltip-text: #111827;
        --balance-shadow: 0 14px 35px rgba(0, 0, 0, 0.38);
    }

    .admin-balance-load-state--error {
        border-color: #991b1b;
        background: #2b1719;
        color: #fecaca;
    }

    .admin-balance-timeline__total--balance[data-balance-state="debt"] {
        border-color: #f87171;
        background: #2b1719;
    }

    .admin-balance-timeline__total--balance[data-balance-state="debt"] dt,
    .admin-balance-timeline__total--balance dd[data-balance-sign="debt"] {
        color: #fca5a5;
    }

    .admin-balance-timeline__total--balance dd[data-balance-sign="balance"] {
        color: #6ee7b7;
    }

    .admin-balance-timeline__tooltip-label {
        color: #475569;
    }
}