.ct-app {
    --ct-bg: #000000;
    --ct-graph-bg: #000000;
    --ct-panel: #050505;
    --ct-text: #ffffff;
    --ct-text-muted: #a1a1aa;
    --ct-grid: #3f3f46;
    --ct-axis: #ffffff;
    --ct-curve: #facc15;
    --ct-now: #1d4ed8;
    --ct-threshold-stimulated: #166534;
    --ct-threshold-high: #f97316;
    --ct-threshold-max: #ef4444;
    --ct-chip-bg: rgba(120,76,16,.08);
    --ct-chip-border: rgba(120,76,16,.35);
    --ct-card-bg: rgba(120,76,16,.05);
    --ct-card-border: rgba(120,76,16,.25);
    --ct-modal-bg: #120b03;
    --ct-focus: #ca8a04;
    --ct-tooltip-text: #facc15;
    --ct-accent-glow: rgba(250,204,21,.26);
    --ct-accent-border: rgba(250,204,21,.62);
    --ct-page-text: inherit;
    --ct-page-muted: currentColor;
    --ct-control-bg: rgba(120,76,16,.06);
    --ct-control-border: rgba(120,76,16,.35);
    display: block;
}

html[data-theme="light"] .ct-app {
    --ct-graph-bg: #000000;
    --ct-curve: #facc15;
    --ct-focus: #a16207;
    --ct-tooltip-text: #facc15;
    --ct-accent-glow: rgba(161,98,7,.20);
    --ct-accent-border: rgba(202,138,4,.62);
    --ct-chip-bg: rgba(120,76,16,.08);
    --ct-chip-border: rgba(120,76,16,.32);
    --ct-card-bg: rgba(120,76,16,.055);
    --ct-card-border: rgba(120,76,16,.24);
    --ct-modal-bg: #fff8ed;
    --ct-control-bg: rgba(120,76,16,.045);
    --ct-control-border: rgba(120,76,16,.32);
}

html[data-theme="dark"] .ct-app {
    --ct-graph-bg: #000000;
    --ct-curve: #facc15;
    --ct-focus: #facc15;
    --ct-tooltip-text: #facc15;
    --ct-accent-glow: rgba(250,204,21,.28);
    --ct-accent-border: rgba(250,204,21,.68);
    --ct-chip-bg: rgba(250,204,21,.08);
    --ct-chip-border: rgba(250,204,21,.28);
    --ct-card-bg: rgba(250,204,21,.045);
    --ct-card-border: rgba(250,204,21,.20);
    --ct-modal-bg: #120b03;
    --ct-control-bg: rgba(250,204,21,.055);
    --ct-control-border: rgba(250,204,21,.25);
}

@media (prefers-color-scheme: light) {
    html:not([data-theme]) .ct-app {
        --ct-graph-bg: #000000;
        --ct-curve: #facc15;
        --ct-focus: #a16207;
        --ct-tooltip-text: #facc15;
        --ct-accent-glow: rgba(161,98,7,.20);
        --ct-accent-border: rgba(202,138,4,.62);
        --ct-chip-bg: rgba(120,76,16,.08);
        --ct-chip-border: rgba(120,76,16,.32);
        --ct-card-bg: rgba(120,76,16,.055);
        --ct-card-border: rgba(120,76,16,.24);
        --ct-modal-bg: #fff8ed;
        --ct-control-bg: rgba(120,76,16,.045);
        --ct-control-border: rgba(120,76,16,.32);
    }
}

.ct-shell {
    color: inherit;
    background: transparent;
    border: 0;
    border-radius: 0;
    padding: 0;
    margin-top: 12px;
}

.ct-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) minmax(300px, .9fr);
    gap: 16px;
    align-items: start;
}

.ct-side {
    display: grid;
    gap: 16px;
}

.ct-panel {
    border: 1px solid var(--ct-card-border);
    background: var(--ct-card-bg);
    border-radius: 14px;
    padding: 14px;
}

.ct-graph-panel {
    padding: 12px;
}

.ct-graph-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 4px 4px 10px;
}

.ct-current-metric span {
    display: block;
    opacity: .72;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.ct-current-metric h2 {
    margin: 0;
    color: var(--ct-focus);
    font-size: clamp(30px, 5vw, 54px);
    line-height: .95;
    letter-spacing: -.06em;
    text-shadow: 0 0 18px var(--ct-accent-glow);
}

.ct-panel h2 {
    margin: 0;
    font-size: 18px;
    letter-spacing: -.02em;
}

.ct-panel h3 {
    margin: 12px 0 8px;
    opacity: .78;
    font-size: 12px;
    letter-spacing: .06em;
    text-transform: uppercase;
}

.ct-projection {
    color: var(--ct-focus);
    font-size: 14px;
    text-align: right;
}

.ct-graph-wrap {
    position: relative;
}

.ct-disclaimer,
.ct-help,
.ct-empty {
    opacity: .78;
    font-size: 13px;
}

.ct-disclaimer {
    margin: 10px 4px 0;
}

.ct-help,
.ct-empty {
    margin: 8px 0 0;
}

.ct-graph {
    display: block;
    width: 100%;
    height: clamp(320px, 58vh, 620px);
    min-height: 320px;
    color: var(--ct-text);
}

.ct-hover-readout {
    position: absolute;
    z-index: 5;
    transform: translate(-50%, -110%);
    pointer-events: none;
    border: 1px solid var(--ct-accent-border);
    border-radius: 999px;
    background: rgba(0, 0, 0, .88);
    color: var(--ct-tooltip-text);
    box-shadow: 0 10px 30px rgba(0, 0, 0, .28);
    padding: 6px 9px;
    font-size: 12px;
    font-weight: 800;
    white-space: nowrap;
}

.ct-graph-bg {
    fill: var(--ct-graph-bg);
}

.ct-graph-grid {
    stroke: var(--ct-grid);
    stroke-width: 1;
}

.ct-graph-axis {
    stroke: var(--ct-axis);
    stroke-width: 1;
}

.ct-graph-label {
    fill: var(--ct-text-muted);
    font-size: 12px;
}

.ct-caffeine-curve {
    stroke: var(--ct-curve);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
}

.ct-caffeine-curve-future {
    stroke-dasharray: 4 4;
}

.ct-now-line {
    stroke: var(--ct-now);
    stroke-width: 1.5;
}

.ct-threshold-stimulated,
.ct-threshold-high,
.ct-threshold-max {
    stroke-width: 1.2;
}

line.ct-threshold-stimulated {
    stroke: var(--ct-threshold-stimulated);
}

line.ct-threshold-high {
    stroke: var(--ct-threshold-high);
}

line.ct-threshold-max {
    stroke: var(--ct-threshold-max);
}

.ct-threshold-label {
    font-size: 11px;
    font-weight: 700;
}

text.ct-threshold-stimulated {
    fill: var(--ct-threshold-stimulated);
}

text.ct-threshold-high {
    fill: var(--ct-threshold-high);
}

text.ct-threshold-max {
    fill: var(--ct-threshold-max);
}

.ct-threshold-legend {
    margin: 12px 4px 0;
}

.ct-threshold-legend h3 {
    margin: 0 0 8px;
    opacity: .78;
    font-size: 12px;
    letter-spacing: .06em;
    text-transform: uppercase;
}

.ct-threshold-legend-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.ct-threshold-legend-item {
    border: 1px solid var(--ct-card-border);
    border-radius: 12px;
    background: rgba(127,127,127,.04);
    padding: 10px;
}

.ct-threshold-legend-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 7px;
}

.ct-threshold-value {
    font-size: 13px;
    font-weight: 850;
    font-variant-numeric: tabular-nums;
}

.ct-threshold-badge {
    border: 1px solid currentColor;
    border-radius: 999px;
    padding: 2px 7px;
    font-size: 11px;
    font-weight: 850;
}

.ct-threshold-legend-item strong {
    display: block;
    font-size: 13px;
    margin-bottom: 4px;
}

.ct-threshold-legend-item p {
    margin: 0;
    opacity: .78;
    font-size: 12px;
    line-height: 1.4;
}

.ct-legend-stimulated .ct-threshold-badge,
.ct-legend-stimulated .ct-threshold-value {
    color: var(--ct-threshold-stimulated);
}

.ct-legend-high .ct-threshold-badge,
.ct-legend-high .ct-threshold-value {
    color: var(--ct-threshold-high);
}

.ct-legend-max .ct-threshold-badge,
.ct-legend-max .ct-threshold-value {
    color: var(--ct-threshold-max);
}

.ct-field {
    display: grid;
    gap: 6px;
    font-size: 13px;
    font-weight: 650;
}

.ct-input {
    width: 100%;
    box-sizing: border-box;
    border: 1px solid var(--ct-control-border);
    border-radius: 10px;
    background: var(--ct-control-bg);
    color: var(--ct-page-text);
    font: inherit;
    padding: 10px 11px;
}

.ct-input:focus,
.ct-button:focus-visible,
.ct-drink-button:focus-visible,
.ct-icon-button:focus-visible,
.ct-back:focus-visible {
    outline: 2px solid var(--ct-focus);
    outline-offset: 2px;
}

.ct-drink-section {
    margin-top: 12px;
}

.ct-drink-list {
    display: grid;
    gap: 7px;
}

.ct-drink-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 6px;
}

.ct-drink-button,
.ct-button {
    border: 1px solid var(--ct-control-border);
    border-radius: 10px;
    background: var(--ct-control-bg);
    color: var(--ct-page-text);
    cursor: pointer;
    font: inherit;
}

.ct-drink-button {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 11px;
    text-align: left;
}

.ct-drink-button span:first-child {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ct-drink-button span:last-child {
    color: var(--ct-focus);
    font-variant-numeric: tabular-nums;
}

.ct-drink-button:hover,
.ct-button:hover,
.ct-icon-button:hover {
    border-color: var(--ct-focus);
}

.ct-button {
    padding: 10px 12px;
    font-weight: 750;
}

.ct-link-button {
    display: inline-flex;
    justify-content: center;
    margin-top: 10px;
    text-decoration: none;
}

.ct-button-secondary {
    color: var(--ct-focus);
}

.ct-icon-button {
    width: 38px;
    min-height: 38px;
    border: 1px solid var(--ct-control-border);
    border-radius: 10px;
    background: var(--ct-control-bg);
    color: var(--ct-page-muted);
    cursor: pointer;
    font: inherit;
    font-size: 20px;
    line-height: 1;
}

.ct-custom-form {
    display: grid;
    gap: 9px;
    margin-top: 10px;
}

.ct-weight-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 84px;
    gap: 8px;
}

.ct-recent-list {
    display: grid;
    gap: 8px;
}

.ct-recent-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--ct-control-border);
    border-radius: 10px;
    background: var(--ct-control-bg);
    padding: 9px;
}

.ct-recent-row strong,
.ct-recent-row span {
    display: block;
}

.ct-recent-row strong {
    font-size: 14px;
}

.ct-recent-row span {
    opacity: .78;
    font-size: 13px;
}

.ct-status {
    min-height: 20px;
    margin-top: 10px;
    color: var(--ct-focus);
    font-size: 13px;
}

.ct-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 500;
    display: grid;
    place-items: center;
    background: rgba(0, 0, 0, .68);
    padding: 18px;
}

.ct-modal {
    width: min(420px, 100%);
    border: 1px solid var(--ct-card-border);
    border-radius: 18px;
    background: var(--ct-modal-bg);
    color: var(--ct-page-text);
    box-shadow: 0 24px 80px rgba(0, 0, 0, .42);
    padding: 18px;
}

.ct-modal h2 {
    margin: 0 0 4px;
    font-size: 20px;
    letter-spacing: -.03em;
}

.ct-modal-dose {
    margin: 0 0 14px;
    color: var(--ct-focus);
    font-weight: 800;
}

.ct-time-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 120px;
    gap: 8px;
}

.ct-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 14px;
}

@media (max-width: 900px) {
    .ct-shell {
        padding: 12px;
        border-radius: 16px;
    }

    .ct-layout {
        grid-template-columns: 1fr;
    }

    .ct-graph-heading {
        display: block;
    }

    .ct-projection {
        margin-top: 4px;
        text-align: left;
    }

    .ct-current-metric h2 {
        font-size: 34px;
    }

    .ct-graph {
        height: 48vh;
    }

    .ct-threshold-legend-grid {
        grid-template-columns: 1fr;
    }

    .ct-modal-actions {
        display: grid;
    }

    .ct-time-grid {
        grid-template-columns: 1fr;
    }
}