:root {
    color-scheme: light;
    --page: #f7f7f4;
    --panel: #ffffff;
    --text: #171a1f;
    --muted: #5d6673;
    --border: #d9ded8;
    --accent: #22624f;
    --accent-hover: #194b3c;
    --error-bg: #fff0ed;
    --error-text: #9d2d20;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--page);
    color: var(--text);
}

.shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
}

.panel {
    width: min(100%, 420px);
    padding: 32px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 18px 50px rgb(23 26 31 / 8%);
}

.workspace {
    width: min(100%, 1500px);
    min-height: calc(100vh - 36px);
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 14px;
}

.topbar h1,
.chart-header h2,
.panel-heading h2 {
    margin: 0;
}

.controls {
    display: grid;
    grid-template-columns: max-content 170px max-content minmax(340px, 1fr) max-content;
    gap: 10px 14px;
    align-items: center;
    padding: 12px 14px;
    margin-bottom: 14px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.viewer {
    display: grid;
    grid-template-columns: minmax(230px, 2fr) minmax(0, 10fr);
    gap: 14px;
    align-items: start;
}

.selected-plots {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    min-height: 34px;
    margin: -4px 0 14px;
    color: var(--muted);
    font-size: 0.92rem;
}

.selected-plots[hidden] {
    display: none;
}

.plot-chip {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #ffffff;
    color: var(--text);
    font-weight: 700;
}

.plot-chip button {
    width: 18px;
    height: 18px;
    padding: 0;
    border: 0;
    border-radius: 4px;
    background: #edf0ed;
    color: var(--text);
    cursor: pointer;
    font-size: 0.72rem;
    font-weight: 800;
    line-height: 18px;
}

.parameter-panel,
.chart-panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.parameter-panel {
    padding: 14px;
}

.panel-heading,
.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.panel-heading {
    margin-bottom: 10px;
}

.panel-heading h2,
.chart-header h2 {
    font-size: 1.08rem;
}

.chart-header {
    padding: 16px 16px 8px;
}

.chart-header p {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.parameter-list {
    display: grid;
    gap: 10px;
}

.parameter-list.two-column {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.parameter-column {
    display: grid;
    gap: 5px;
    min-width: 0;
}

.parameter-column h3 {
    margin: 0 0 3px;
    color: var(--muted);
    font-size: 0.72rem;
    letter-spacing: 0;
    text-transform: uppercase;
}

.check-row {
    display: grid;
    grid-template-columns: 13px 9px minmax(0, 1fr);
    gap: 5px;
    align-items: center;
    font-size: 0.72rem;
    font-weight: 650;
    line-height: 1.18;
}

.check-row input {
    min-height: auto;
    width: 12px;
    height: 12px;
    margin: 0;
}

.swatch {
    width: 8px;
    height: 8px;
    border-radius: 2px;
}

.parameter-grid {
    display: grid;
    gap: 1px;
    overflow-x: auto;
    font-size: 0.72rem;
}

.parameter-header-cell,
.parameter-name,
.parameter-check-cell {
    min-height: 24px;
    padding: 4px 5px;
    background: #f8f9f7;
}

.parameter-header-cell {
    color: var(--muted);
    font-weight: 800;
    text-align: center;
}

.parameter-name {
    display: grid;
    grid-template-columns: 8px minmax(0, 1fr);
    gap: 5px;
    align-items: center;
    color: var(--text);
    font-weight: 700;
    text-align: left;
}

.parameter-check-cell {
    display: grid;
    place-items: center;
}

.parameter-check-cell input {
    width: 12px;
    height: 12px;
    min-height: auto;
    margin: 0;
    padding: 0;
}

.chart-panel {
    overflow: hidden;
    position: relative;
}

#engine-chart {
    display: block;
    width: 100%;
    height: min(68vh, 700px);
    min-height: 480px;
    cursor: grab;
}

#engine-chart:active {
    cursor: grabbing;
}

.chart-tooltip {
    position: absolute;
    z-index: 5;
    max-width: 260px;
    padding: 8px 10px;
    border: 1px solid #d00000;
    border-radius: 6px;
    background: #fff5f5;
    color: #8a0000;
    box-shadow: 0 8px 24px rgb(23 26 31 / 12%);
    font-size: 0.82rem;
    font-weight: 700;
    line-height: 1.35;
    pointer-events: none;
}

.hint {
    margin: 0;
    padding: 0 16px 16px;
    color: var(--muted);
    font-size: 0.9rem;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    font-size: 2rem;
    line-height: 1.1;
}

.lead {
    margin: 14px 0 0;
    color: var(--muted);
    line-height: 1.5;
}

.meta {
    margin: 18px 0 24px;
    color: var(--muted);
    font-size: 0.95rem;
}

.login-form {
    display: grid;
    gap: 10px;
    margin-top: 24px;
}

label {
    color: var(--text);
    font-size: 1rem;
    font-weight: 700;
}

input,
select {
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font: inherit;
    font-size: 1rem;
}

input:focus,
select:focus {
    border-color: var(--accent);
    outline: 3px solid rgb(34 98 79 / 18%);
}

.button {
    min-height: 44px;
    margin-top: 12px;
    padding: 10px 16px;
    border: 0;
    border-radius: 6px;
    background: var(--accent);
    color: #ffffff;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
}

.button:hover {
    background: var(--accent-hover);
}

.controls .button,
.topbar .button {
    margin-top: 0;
}

.button.secondary {
    background: #eef2ef;
    color: var(--text);
}

.button.secondary:hover {
    background: #e1e8e3;
}

.icon-button {
    width: 34px;
    height: 34px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #ffffff;
    color: var(--text);
    cursor: pointer;
    font: inherit;
    font-size: 1.25rem;
    font-weight: 800;
    line-height: 1;
}

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

.zoom-buttons {
    display: flex;
    gap: 8px;
    align-items: center;
}

.scroll-row {
    padding: 0 16px 10px;
}

.scroll-row input {
    min-height: 28px;
    padding: 0;
}

.text-button {
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--accent);
    cursor: pointer;
    font: inherit;
    font-weight: 700;
}

.project-link {
    display: grid;
    gap: 5px;
    margin: 24px 0;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: inherit;
    text-decoration: none;
}

.project-link:hover {
    border-color: var(--accent);
}

.project-link span:first-child {
    font-weight: 800;
}

.project-link span:last-child {
    color: var(--muted);
    font-size: 0.92rem;
}

.error {
    margin: 18px 0 0;
    padding: 12px;
    border-radius: 6px;
    background: var(--error-bg);
    color: var(--error-text);
    line-height: 1.4;
}

@media (max-width: 900px) {
    .topbar,
    .viewer {
        display: grid;
        grid-template-columns: 1fr;
    }

    .controls {
        grid-template-columns: 1fr;
    }

    .parameter-panel {
        order: 2;
    }

    .parameter-list.two-column {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .shell {
        padding: 14px;
    }

    .panel,
    .parameter-panel {
        padding: 20px;
    }

    #engine-chart {
        min-height: 360px;
    }
}