:root {
    color-scheme: light;
    --bg: #dfe5e5;
    --panel: rgba(246, 244, 235, 0.94);
    --panel-soft: rgba(226, 235, 235, 0.86);
    --text: #111312;
    --muted: #5f665f;
    --line: rgba(27, 35, 35, 0.22);
    --blue: #1f9aa5;
    --blue-strong: #24415f;
    --teal: #1f9aa5;
    --purple: #7c6f86;
    --gold: #d39b37;
    --economist-red: #d71920;
    --ink: #0e1111;
    --paper: #f6f4eb;
    --paper-cool: #e4eeee;
    --chart-grid: rgba(36, 65, 95, 0.15);
    --plot-axis: rgba(36, 65, 95, 0.78);
    --plot-axis-strong: rgba(36, 65, 95, 0.72);
    --glass-edge: rgba(255, 255, 255, 0.48);
    --surface-border: rgba(20, 28, 28, 0.18);
    --surface-border-soft: rgba(20, 28, 28, 0.12);
    --input-bg: rgba(255, 255, 255, 0.72);
    --button-border: rgba(17, 19, 18, 0.26);
    --hero-text: #ffffff;
    --hero-muted: rgba(255, 255, 255, 0.78);
    --hero-overlay: linear-gradient(90deg, rgba(0, 0, 0, 0.66), rgba(0, 0, 0, 0.16));
    --chart-surface: var(--paper);
    --chart-sheen: linear-gradient(180deg, rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0));
    --panel-bg: rgba(246, 244, 235, 0.92);
    --panel-wash: linear-gradient(135deg, rgba(228, 238, 238, 0.72), rgba(246, 244, 235, 0.88));
    --modal-surface: #dfe5e5;
    --modal-orb-a: rgba(31, 154, 165, 0.20);
    --modal-orb-b: rgba(211, 155, 55, 0.18);
    --body-atmosphere:
        radial-gradient(circle at 18% 4%, rgba(31, 154, 165, 0.42), transparent 31rem),
        radial-gradient(circle at 80% 12%, rgba(211, 155, 55, 0.28), transparent 34rem),
        radial-gradient(circle at 62% 88%, rgba(168, 48, 45, 0.28), transparent 30rem);
    --point-edge: rgba(8, 12, 12, 0.16);
    --point-opacity: 0.64;
    --gradient-deep-ocean: linear-gradient(115deg, rgba(31, 154, 165, 0.34), rgba(211, 155, 55, 0.31) 48%, rgba(168, 48, 45, 0.34));
    --font-roobert: "Roobert", "Aptos", "Segoe UI", sans-serif;
    --font-editorial: Georgia, "Times New Roman", serif;
    --radius-cards: 3px;
    --radius-controls: 4px;
    --radius-buttons: 4px;
    --shadow: none;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --bg: #050606;
    --panel: rgba(14, 17, 17, 0.78);
    --panel-soft: rgba(24, 32, 32, 0.76);
    --text: #f2efe4;
    --muted: #a9afa6;
    --line: rgba(255, 255, 255, 0.18);
    --blue-strong: #8fb7d7;
    --ink: #f6f4eb;
    --paper: #151817;
    --paper-cool: #1f2b2b;
    --chart-grid: rgba(202, 220, 219, 0.16);
    --plot-axis: rgba(220, 232, 231, 0.78);
    --plot-axis-strong: rgba(220, 232, 231, 0.66);
    --glass-edge: rgba(255, 255, 255, 0.20);
    --surface-border: rgba(255, 255, 255, 0.16);
    --surface-border-soft: rgba(255, 255, 255, 0.10);
    --input-bg: rgba(255, 255, 255, 0.08);
    --button-border: rgba(255, 255, 255, 0.28);
    --hero-text: #ffffff;
    --hero-muted: rgba(255, 255, 255, 0.72);
    --hero-overlay: linear-gradient(90deg, rgba(0, 0, 0, 0.34), rgba(0, 0, 0, 0.68));
    --chart-surface: #111514;
    --chart-sheen: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0));
    --panel-bg: rgba(13, 16, 16, 0.78);
    --panel-wash: linear-gradient(135deg, rgba(31, 154, 165, 0.10), rgba(246, 244, 235, 0.03));
    --modal-surface: #0c0f0f;
    --modal-orb-a: rgba(31, 154, 165, 0.18);
    --modal-orb-b: rgba(211, 155, 55, 0.12);
    --body-atmosphere:
        radial-gradient(circle at 18% 4%, rgba(31, 154, 165, 0.26), transparent 31rem),
        radial-gradient(circle at 80% 12%, rgba(211, 155, 55, 0.18), transparent 34rem),
        radial-gradient(circle at 62% 88%, rgba(168, 48, 45, 0.22), transparent 30rem);
    --point-edge: rgba(255, 255, 255, 0.20);
    --point-opacity: 0.78;
    --gradient-deep-ocean: linear-gradient(115deg, rgba(31, 154, 165, 0.42), rgba(211, 155, 55, 0.24) 48%, rgba(168, 48, 45, 0.38));
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    background: var(--body-atmosphere), var(--bg);
    color: var(--text);
    font-family: var(--font-roobert);
    text-wrap: pretty;
}

button,
select,
input {
    font: inherit;
}

button,
select,
input {
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    color: var(--text);
}

button {
    cursor: pointer;
}

select,
input {
    width: 100%;
    min-height: 42px;
    padding: 0 12px;
}

.page-shell {
    width: min(1420px, calc(100% - 40px));
    margin: 0 auto;
    padding: 20px 0 40px;
}

.hero {
    padding: 10px 0 22px 3px;
    text-align: left;
}

.hero h1 {
    margin: 0;
    font-size: 54px;
    line-height: 1;
    color: var(--blue-strong);
    letter-spacing: -0.04em;
    font-weight: 800;
}

.hero p {
    margin: 10px 0 0;
    color: #6c6e80;
    font-size: 16px;
}

.top-grid {
    display: grid;
    grid-template-columns: 0.94fr 1.36fr;
    gap: 28px;
    align-items: stretch;
}

.top-right-stack {
    display: grid;
    gap: 28px;
}

.panel {
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.panel-head {
    padding: 24px 24px 0;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    text-align: left;
}

.panel-head h2,
.panel-head h3 {
    margin: 0;
    font-size: 24px;
    line-height: 1.15;
    font-weight: 800;
}

.panel-layers {
    min-height: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.chart-icon-button,
.chart-close {
    width: 34px;
    min-width: 34px;
    height: 34px;
    min-height: 34px;
    padding: 0;
    display: grid;
    place-items: center;
    background: transparent;
    border: 0;
    color: #8d8fad;
    font-size: 28px;
}

.chart-icon-button svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.layer-list {
    padding: 12px 24px 0;
}

.layer-row {
    position: relative;
    width: 100%;
    margin: 0 0 8px;
    padding: 8px 10px;
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr) 36px;
    gap: 10px;
    align-items: center;
    border: 1px solid #c8d9eb;
    border-radius: 10px;
    background: linear-gradient(180deg, rgba(251, 253, 255, 0.96), rgba(247, 249, 255, 0.96));
    box-shadow: inset 0 0 0 1px rgba(120, 184, 243, 0.10);
    transition: transform 140ms ease, box-shadow 140ms ease, border-color 140ms ease;
}

.layer-row.layer-glass {
    background: linear-gradient(180deg, rgba(220, 241, 249, 0.95), rgba(237, 248, 252, 0.95));
}

.layer-row.layer-coating {
    background: linear-gradient(180deg, rgba(245, 233, 251, 0.96), rgba(250, 243, 253, 0.96));
}

.layer-row.layer-cavity {
    background: linear-gradient(180deg, rgba(235, 249, 246, 0.96), rgba(245, 252, 250, 0.96));
}

.layer-row.layer-interlayer {
    background: linear-gradient(180deg, rgba(251, 245, 224, 0.96), rgba(253, 250, 238, 0.96));
}

.layer-row.invalid {
    border-color: #e2b3be;
    box-shadow: none;
}

.layer-row-leading {
    display: grid;
    min-height: 34px;
    align-content: center;
    justify-items: center;
    gap: 4px;
    cursor: grab;
    touch-action: none;
    user-select: none;
}

.layer-row-index {
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    font-weight: 700;
    text-align: center;
    color: #36435b;
}

.layer-row-leading:active {
    cursor: grabbing;
}

body.dragging-layer,
body.dragging-layer * {
    user-select: none;
    cursor: grabbing;
}

.sortable-chosen {
    cursor: grabbing;
}

.sortable-ghost {
    opacity: 0.35;
}

.sortable-drag {
    box-shadow: 0 18px 42px rgba(32, 38, 60, 0.18);
}

.layer-row-main {
    min-width: 0;
    display: grid;
    gap: 0;
}

.layer-print-summary {
    display: none;
}

.layer-row-main select,
.layer-row-main input {
    min-height: 34px;
    border-radius: 9px;
    background: #fff;
}

.layer-inline-fields {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 110px;
    gap: 8px;
}

.layer-row-meta {
    color: var(--muted);
    font-size: 12px;
    line-height: 1.35;
    display: none;
}

.layer-row-delete {
    width: 32px;
    min-width: 32px;
    height: 32px;
    min-height: 32px;
    padding: 0;
    border: 0;
    background: transparent;
    color: #7f8097;
    font-size: 18px;
}

.stack-status {
    margin: 2px 24px 0;
    min-height: 22px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.4;
}

.stack-status.invalid {
    color: #ba5c6c;
}

.stack-status.valid {
    color: #5e7692;
}

.add-layer-grid {
    padding: 14px 24px 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.add-button {
    min-height: 40px;
    background: #fff;
    font-weight: 600;
}

.add-glass {
    border-color: #9fd0ef;
    color: #6fb2df;
}

.add-coating {
    border-color: #d9a6ef;
    color: #b56cd9;
}

.add-cavity {
    border-color: #90d5c8;
    color: #57b6a7;
}

.add-interlayer {
    border-color: #e3cb81;
    color: #c39d35;
}

.panel-actions {
    padding: 12px 24px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.panel-actions .primary-button {
    flex: 1 1 auto;
}

.panel-actions-top {
    padding-top: 14px;
    padding-bottom: 8px;
}

.preset-switch {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
}

.ghost-button,
.primary-button {
    min-height: 42px;
    font-weight: 600;
}

.ghost-button.active {
    background: #eef5fe;
    border-color: #b7d5f3;
    color: #4d8fd0;
}

.primary-button {
    background: #e9e8f4;
    border-color: #dfdeed;
}

.keep-updated-toggle {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    white-space: nowrap;
    color: #686c86;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    user-select: none;
}

.keep-updated-toggle input {
    width: 16px;
    height: 16px;
    accent-color: #5f8fd5;
}

.panel-diagram,
.panel-metrics {
    padding-bottom: 24px;
}

.diagram-stage {
    margin: 24px;
    min-height: 272px;
    border-radius: 10px;
    background: #f0f0fa;
    border: 1px solid #ececf5;
    position: relative;
    overflow: hidden;
}

.diagram-labels {
    position: absolute;
    top: 14px;
    left: 16px;
    right: 16px;
    display: flex;
    justify-content: space-between;
    color: #676a85;
    font-size: 14px;
}

.diagram-track {
    position: absolute;
    inset: 46px 18px 16px 18px;
    display: flex;
    align-items: stretch;
    gap: 0;
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 2px;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x;
}

.diagram-layer {
    position: relative;
    min-width: 28px;
    flex: 0 0 auto;
    border-radius: 4px;
    background: #bfe5f1;
    box-shadow: inset 0 0 0 1px rgba(85, 145, 171, 0.12);
    cursor: grab;
    touch-action: pan-x;
    user-select: none;
    transition: transform 180ms cubic-bezier(0.2, 0, 0, 1), box-shadow 180ms cubic-bezier(0.2, 0, 0, 1), opacity 140ms ease;
    will-change: transform;
}

.diagram-track .sortable-chosen {
    box-shadow: 0 0 0 2px rgba(98, 168, 234, 0.55), 0 16px 34px rgba(32, 38, 60, 0.16);
}

.diagram-track .sortable-ghost {
    opacity: 0.42;
    box-shadow: inset 0 0 0 2px rgba(98, 168, 234, 0.45);
}

.diagram-track .sortable-drag {
    box-shadow: 0 18px 44px rgba(32, 38, 60, 0.22);
}

.sortable-fallback {
    cursor: grabbing !important;
    opacity: 0.98 !important;
    pointer-events: none;
    transform-origin: 0 0;
    z-index: 10000;
}

.diagram-number {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 13px;
    font-weight: 700;
    color: #344258;
    line-height: 1;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.75);
    pointer-events: none;
}

.metric-grid {
    padding: 22px 24px 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.metric-card {
    min-height: 82px;
    padding: 16px 16px 14px;
    border-radius: 10px;
    background: #f7f7fc;
    border: 1px solid #f0f0f7;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px 16px;
    align-items: center;
}

.metric-card span {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.35;
}

.metric-card strong {
    color: var(--blue-strong);
    font-size: 18px;
    line-height: 1;
    white-space: nowrap;
}

.metric-card small {
    grid-column: 1 / -1;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.35;
}

.panel-visualizer,
.panel-spectrum,
.panel-data {
    margin-top: 28px;
}

.visualizer-controls {
    padding: 22px 24px 0;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.visualizer-controls label {
    display: grid;
    gap: 8px;
    color: #636682;
    font-size: 14px;
    font-weight: 600;
}

.hidden-select {
    display: none;
}

.visualizer-frame-shell {
    --visualizer-frame-height: 100%;
    margin: 22px 24px 24px;
    height: auto;
    aspect-ratio: 16 / 9;
    box-sizing: content-box;
    border-radius: 10px;
    background: #dfdfdf;
    border: 1px solid #dedee5;
    position: relative;
    overflow: hidden;
}

.visualizer-frame,
.visualizer-single-frame {
    display: block;
    width: 100%;
    height: 100%;
    margin: 0;
    border: 0;
    background: #dfdfdf;
}

.visualizer-frame[hidden],
.visualizer-single-frame[hidden] {
    display: none;
}

.visualizer-frame img,
.visualizer-frame canvas,
.visualizer-single-frame {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    display: block;
}

#visualizer-before,
#visualizer-after {
    width: 100% !important;
    height: var(--visualizer-frame-height) !important;
    object-fit: cover !important;
    object-position: center center !important;
    display: block !important;
}

.visualizer-handle {
    width: 1px;
    height: 100%;
    background: #fff;
    box-shadow: 0 0 0 1px rgba(32, 38, 60, 0.16), 0 0 12px rgba(32, 38, 60, 0.16);
    position: relative;
}

.visualizer-handle::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 42px;
    transform: translate(-50%, -50%);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.86);
    border: 1px solid rgba(28, 36, 58, 0.18);
    box-shadow: 0 8px 18px rgba(28, 36, 58, 0.16);
}

.visualizer-handle::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 7px;
    height: 18px;
    transform: translate(-50%, -50%);
    border-left: 1px solid #6b718c;
    border-right: 1px solid #6b718c;
}

.spectrum-grid {
    padding: 22px 24px 24px;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
}

.summary-visual {
    min-height: 260px;
    padding: 20px;
    border: 1px solid #ececf4;
    border-radius: 10px;
    background: #fff;
}

.field-note,
.plot-list,
.page-footer {
    color: var(--muted);
}

.summary-visual {
    min-width: 0;
}

.spectrum-card {
    display: grid;
    gap: 14px;
}

.spectrum-legend span {
    color: #6f738f;
    font-size: 12px;
}

.spectrum-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
    justify-content: flex-end;
}

.spectrum-legend span {
    display: inline-flex;
    gap: 6px;
    align-items: center;
}

.legend-line {
    width: 18px;
    height: 3px;
    display: inline-block;
}

.legend-line.transmittance {
    color: #3577d4;
    background: #3577d4;
}

.spectrum-line.transmittance {
    stroke: #3577d4;
}

.spectrum-dot.transmittance {
    fill: #3577d4;
}

.legend-line.reflectance-front {
    color: #d1832f;
    background: #d1832f;
}

.spectrum-line.reflectance-front {
    stroke: #d1832f;
}

.spectrum-dot.reflectance-front {
    fill: #d1832f;
}

.legend-line.reflectance-back {
    color: #5c9f63;
    background: #5c9f63;
}

.spectrum-line.reflectance-back {
    stroke: #5c9f63;
}

.spectrum-dot.reflectance-back {
    fill: #5c9f63;
}

.spectrum-plot {
    position: relative;
    min-height: 340px;
    touch-action: none;
}

.spectrum-svg {
    width: 100%;
    height: auto;
    display: block;
    overflow: visible;
}

.spectrum-grid-lines line {
    stroke: #e4e7f1;
    stroke-width: 1;
}

.spectrum-axes line {
    stroke: #a7adc3;
    stroke-width: 1.4;
}

.spectrum-axes text {
    fill: #777d98;
    font-size: 12px;
    text-anchor: middle;
}

.spectrum-axes text:not(.axis-title-x) {
    text-anchor: end;
}

.axis-title {
    fill: #5f657f;
    font-size: 13px;
    font-weight: 600;
    text-anchor: middle !important;
}

.spectrum-line {
    fill: none;
    stroke-width: 2.4;
    stroke-linejoin: round;
    stroke-linecap: round;
}

.spectrum-guide {
    stroke: #9aa1b5;
    stroke-dasharray: 2 5;
    stroke-width: 1.5;
    opacity: 0.72;
    vector-effect: non-scaling-stroke;
}

.spectrum-guide[hidden],
.spectrum-dot[hidden],
.spectrum-tooltip[hidden] {
    display: none;
}

.spectrum-dot {
    stroke-width: 1.4;
    stroke: #fff;
}

.spectrum-tooltip {
    position: absolute;
    width: 136px;
    padding: 7px 8px;
    border: 1px solid #d8dcea;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 10px 24px rgba(34, 39, 63, 0.14);
    font-size: 11px;
    pointer-events: none;
    z-index: 3;
    display: flex;
    flex-wrap: wrap;
    gap: 2px 8px;
    line-height: 1.25;
}

.spectrum-tooltip strong {
    color: #30364c;
    flex-basis: 100%;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 18px;
}

.detail-grid div {
    padding: 10px 0;
    border-top: 1px solid #efeff6;
    display: flex;
    justify-content: space-between;
    gap: 16px;
}

.detail-grid strong {
    text-align: right;
}

.warning-list {
    margin: 16px 0 0;
    color: #ba7d2c;
}

.data-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.panel-head-accent h2 {
    color: var(--blue-strong);
}

.data-grid {
    padding: 22px 24px 24px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.data-card {
    border: 1px solid #dfe2ef;
    border-top: 4px solid var(--blue-strong);
    border-radius: 4px;
    background: #fff;
    box-shadow: 0 10px 26px rgba(32, 38, 60, 0.06);
}

.data-card h3 {
    margin: 0;
    padding: 16px 18px 10px;
    font-size: 15px;
    color: #30364c;
    text-transform: uppercase;
    border-bottom: 1px solid #eef0f6;
}

.data-card-body {
    padding: 6px 18px 16px;
    display: grid;
    gap: 0;
}

.data-row {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    font-size: 14px;
    line-height: 1.4;
    padding: 10px 0;
    border-bottom: 1px solid #f0f2f7;
}

.data-row:last-child {
    border-bottom: 0;
}

.data-row strong {
    color: var(--blue-strong);
    font-weight: 700;
    white-space: nowrap;
}

.page-footer {
    padding: 18px 0 0;
    text-align: center;
    font-size: 13px;
}

.standard-note {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.4;
}

.modal-shell.hidden {
    display: none;
}

.modal-shell {
    position: fixed;
    inset: 0;
    z-index: 50;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(34, 38, 56, 0.38);
}

.modal-panel {
    position: relative;
    width: min(1320px, calc(100% - 48px));
    margin: 34px auto;
    max-height: calc(100vh - 68px);
    overflow: auto;
    border: 1px solid #cfd1e2;
    background: #f6f5fb;
}

.plot-layout {
    padding: 10px 22px 24px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 22px;
}

.modal-head-plot {
    align-items: start;
    padding-bottom: 8px;
}

.modal-head-plot h2 {
    font-size: 24px;
    line-height: 1.15;
}

.modal-head-plot p {
    margin-top: 4px;
    color: #6f7290;
    font-size: 14px;
}

.chart-meta {
    padding: 0 0 10px;
    color: #6f7290;
    font-size: 13px;
}

.plot-main {
    min-width: 0;
}

.plot-card {
    border: 2px solid #46485b;
    background: #fbfbff;
    padding: 12px 12px 18px;
}

.plot-chart-tools {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 4px 0 10px 48px;
}

.plot-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    color: #6c718b;
    font-size: 13px;
    font-weight: 600;
}

.legend-gradient-label {
    color: #5e6483;
}

.legend-gradient-range {
    color: #7a7fa1;
    font-size: 12px;
}

.legend-gradient-bar {
    width: 180px;
    height: 10px;
    border-radius: 999px;
    background: linear-gradient(90deg, hsl(205, 70%, 78%), hsl(130, 76%, 52%), hsl(55, 80%, 58%));
    border: 1px solid rgba(255, 255, 255, 0.92);
}

.legend-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.legend-swatch {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 1px solid rgba(47, 52, 74, 0.18);
}

.legend-swatch.single {
    background: #e26d2d;
}

.legend-swatch.double {
    background: #1387c9;
}

.legend-swatch.triple {
    background: #2e9f55;
}

.plot-chart {
    position: relative;
    min-height: 620px;
    background: #fbfbff;
    touch-action: none;
    user-select: none;
}

.plot-grid,
.plot-points {
    position: absolute;
    inset: 34px 24px 54px 90px;
}

.plot-grid {
    background:
        linear-gradient(to right, rgba(130, 136, 178, 0.22) 1px, transparent 1px),
        linear-gradient(to top, rgba(130, 136, 178, 0.22) 1px, transparent 1px);
    background-size: 20% 20%;
    border-left: 2px solid #a6abc7;
    border-bottom: 2px solid #a6abc7;
}

.plot-axis {
    position: absolute;
    color: #7a7fa1;
    font-size: 12px;
    font-weight: 600;
}

.axis-x {
    left: 50%;
    bottom: 10px;
    transform: translateX(-50%);
}

.axis-y {
    top: 50%;
    left: 10px;
    transform: translateY(-50%) rotate(-90deg);
    transform-origin: left top;
}

.plot-x-ticks,
.plot-y-ticks {
    position: absolute;
    pointer-events: none;
    color: #8487a4;
    font-size: 12px;
}

.plot-x-ticks {
    left: 90px;
    right: 24px;
    bottom: 34px;
    height: 18px;
}

.plot-y-ticks {
    top: 34px;
    bottom: 54px;
    left: 0;
    width: 76px;
}

.plot-tick {
    position: absolute;
}

.plot-x-ticks .plot-tick {
    transform: translateX(-50%);
}

.plot-y-ticks .plot-tick {
    right: 12px;
    transform: translateY(50%);
}

.plot-point {
    position: absolute;
    width: 7px;
    height: 7px;
    min-width: 7px;
    min-height: 7px;
    padding: 0;
    margin-left: -3.5px;
    margin-top: -3.5px;
    box-sizing: border-box;
    display: block;
    appearance: none;
    border-radius: 50%;
    border: 1px solid rgba(39, 45, 65, 0.16);
    opacity: 0.62;
    touch-action: none;
    transition: transform 120ms ease, box-shadow 120ms ease, opacity 120ms ease, border-color 120ms ease;
}

.plot-point.single {
    background: #e26d2d;
}

.plot-point.double {
    background: #1387c9;
}

.plot-point.triple {
    background: #2e9f55;
}

.plot-point:hover,
.plot-point.selected {
    z-index: 3;
    border-color: rgba(255, 255, 255, 0.98);
    transform: scale(1.8);
    box-shadow: 0 0 0 3px rgba(30, 38, 62, 0.22), 0 4px 12px rgba(30, 38, 62, 0.24);
    opacity: 1;
}

.plot-results {
    margin-top: 14px;
    border: 1px solid #d7daeb;
    background: #fcfcff;
}

.plot-results-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-bottom: 1px solid #e3e5f2;
}

.plot-results-head h3,
.plot-control-card h3 {
    margin: 0;
    font-size: 14px;
    color: #37384a;
}

.plot-results-head span {
    color: #7a7fa1;
    font-size: 12px;
}

.plot-rank-field {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #686d89;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}

.plot-rank-field select {
    min-height: 34px;
    max-width: 220px;
    border: 1px solid #d5d8e8;
    background: #fff;
    color: #3d4055;
}

.plot-selected-detail {
    border-bottom: 1px solid #e3e5f2;
    background: #f7f8ff;
}

.plot-selected-empty {
    padding: 12px 14px;
    color: #7a7fa1;
    font-size: 13px;
    font-weight: 600;
}

.plot-selected-card {
    padding: 12px 14px;
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(220px, 0.9fr) auto;
    gap: 14px;
    align-items: center;
}

.plot-selected-card > div:first-child {
    display: grid;
    gap: 4px;
}

.plot-selected-card strong {
    color: #2f3142;
    font-size: 15px;
}

.plot-selected-card span {
    color: #6e728d;
    font-size: 12px;
}

.plot-selected-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.plot-selected-metrics span {
    padding: 4px 7px;
    border: 1px solid #e0e3f2;
    background: #fff;
    color: #515671;
    font-weight: 700;
}

.plot-list {
    padding: 12px;
    display: grid;
    gap: 8px;
    align-content: start;
    max-height: 248px;
    overflow: auto;
    background: #fcfcff;
}

.plot-sidebar {
    display: grid;
    align-content: start;
    gap: 14px;
}

.plot-control-card {
    border: 1px solid #d7daeb;
    background: #fcfcff;
    padding: 14px;
    display: grid;
    gap: 12px;
}

.plot-control-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.ghost-button-small {
    padding: 6px 10px;
    min-height: 0;
    font-size: 12px;
}

.ghost-button-small:disabled {
    cursor: default;
    opacity: 0.48;
}

.plot-field {
    display: grid;
    gap: 6px;
    font-size: 12px;
    color: #686d89;
    font-weight: 600;
}

.plot-field.compact {
    gap: 5px;
}

.plot-field select {
    min-height: 38px;
}

.plot-filter-stack {
    display: grid;
    gap: 12px;
}

.plot-filter {
    display: grid;
    gap: 8px;
    padding: 10px 10px 12px;
    border: 1px solid #e4e6f2;
    background: #fff;
}

.plot-filter-categorical {
    background: #f8f9fe;
}

.plot-chip-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
}

.manufacturer-grid {
    grid-template-columns: 1fr;
    max-height: 210px;
    overflow: auto;
    padding-right: 2px;
}

.plot-chip {
    position: relative;
    display: block;
}

.plot-chip input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.plot-chip span {
    display: block;
    padding: 7px 8px;
    border: 1px solid #d7daeb;
    background: #fff;
    color: #626885;
    font-size: 12px;
    font-weight: 800;
    text-align: center;
}

.manufacturer-chip span {
    text-align: left;
}

.plot-chip input:checked + span {
    border-color: #6b82c8;
    background: #edf2ff;
    color: #33456d;
}

.plot-chip input:focus-visible + span {
    outline: 2px solid #5f63df;
    outline-offset: 2px;
}

.plot-filter-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: baseline;
}

.plot-filter-head strong {
    font-size: 12px;
    color: #404258;
}

.plot-filter-head span {
    font-size: 11px;
    color: #7a7fa1;
}

.plot-range-values {
    display: flex;
    justify-content: space-between;
    gap: 12px;
}

.plot-range-values output {
    font-size: 12px;
    color: #5d627e;
}

.plot-range-slider {
    position: relative;
    height: 28px;
}

.plot-range-track,
.plot-range-active {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    height: 6px;
    border-radius: 999px;
}

.plot-range-track {
    left: 0;
    right: 0;
    background: #d8dceb;
}

.plot-range-active {
    background: #5f63df;
}

.plot-range-slider input[type="range"] {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 28px;
    margin: 0;
    padding: 0;
    background: transparent;
    border: 0;
    appearance: none;
    pointer-events: none;
}

.plot-range-slider input[type="range"]::-webkit-slider-runnable-track {
    height: 6px;
    background: transparent;
}

.plot-range-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid #fff;
    background: #5f63df;
    box-shadow: 0 1px 3px rgba(27, 32, 61, 0.2);
    margin-top: -8px;
    pointer-events: auto;
    cursor: pointer;
}

.plot-range-slider input[type="range"]::-moz-range-track {
    height: 6px;
    background: transparent;
}

.plot-range-slider input[type="range"]::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid #fff;
    background: #5f63df;
    box-shadow: 0 1px 3px rgba(27, 32, 61, 0.2);
    pointer-events: auto;
    cursor: pointer;
}

.plot-range-slider input[type="range"]:focus {
    outline: none;
}

.plot-entry {
    position: relative;
    padding: 10px 12px;
    border: 1px solid #e2e4f1;
    background: #fff;
    text-align: left;
    display: grid;
    gap: 4px;
    cursor: pointer;
    transition: border-color 120ms ease, box-shadow 120ms ease, transform 120ms ease;
}

.plot-entry:hover,
.plot-entry.selected {
    border-color: #8fa6dc;
    box-shadow: 0 8px 18px rgba(48, 55, 88, 0.08);
}

.plot-entry.selected {
    transform: translateY(-1px);
}

.plot-entry strong {
    font-size: 14px;
    color: #2f3142;
}

.plot-rank {
    color: #5f63df !important;
    font-weight: 800;
}

.plot-entry span {
    font-size: 12px;
    color: #6e728d;
}

.plot-list-note {
    border: 1px dashed #d7dbea;
    background: #f8f9fd;
    color: #6e728d;
    font-size: 12px;
    padding: 10px 12px;
}

.error-message {
    color: #bb6372;
    font-weight: 600;
}

.empty-state {
    color: #7a7f98;
    font-size: 13px;
    font-weight: 600;
}

/* Editorial glass redesign layer: DESIGN.md atmosphere with Economist-like data surfaces. */
.page-shell {
    width: min(1280px, calc(100% - 56px));
    padding: 34px 0 52px;
}

.hero {
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    min-height: 170px;
    margin-bottom: 26px;
    padding: 32px 34px;
    overflow: hidden;
    border: 1px solid var(--glass-edge);
    border-radius: var(--radius-cards);
    background:
        var(--hero-overlay),
        var(--gradient-deep-ocean);
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0 auto auto 0;
    width: 42px;
    height: 8px;
    background: transparent;
}

.hero h1 {
    position: relative;
    color: var(--hero-text);
    font-size: clamp(48px, 9vw, 94px);
    font-weight: 400;
    letter-spacing: -0.06em;
}

.hero p {
    position: relative;
    max-width: 560px;
    color: var(--hero-muted);
    font-size: 18px;
    line-height: 1.35;
}

.theme-toggle {
    position: relative;
    min-width: 116px;
    min-height: 38px;
    padding: 0 16px;
    border: 1px solid rgba(255, 255, 255, 0.34);
    border-radius: var(--radius-buttons);
    background: rgba(0, 0, 0, 0.16);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
    backdrop-filter: blur(12px);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.14);
}

.modal-head-actions {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.theme-toggle-compact {
    min-width: 104px;
    min-height: 34px;
    border-color: var(--surface-border);
    background: color-mix(in srgb, var(--chart-surface) 58%, transparent);
    color: var(--ink);
}

.theme-toggle-compact:hover {
    background: color-mix(in srgb, var(--panel-soft) 74%, transparent);
}

.panel,
.modal-panel,
.plot-card,
.plot-results,
.plot-control-card,
.summary-visual,
.data-card,
.metric-card,
.layer-row {
    border-radius: var(--radius-cards);
    box-shadow: none;
}

.panel {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--glass-edge);
    background: var(--panel-bg);
}

.panel::before,
.data-card::before,
.plot-card::before,
.plot-results::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 28px;
    height: 6px;
    background: transparent;
}

.panel-head h2,
.panel-head h3,
.modal-head-plot h2 {
    color: var(--ink);
    font-family: var(--font-editorial);
    font-size: clamp(24px, 2.2vw, 34px);
    font-weight: 700;
    letter-spacing: -0.035em;
}

.panel-head p,
.modal-head-plot p,
.field-note,
.chart-meta,
.page-footer {
    color: var(--muted);
}

button,
select,
input {
    border-color: var(--surface-border);
    border-radius: var(--radius-buttons);
}

select,
input {
    background: var(--input-bg);
    color: var(--ink);
}

.ghost-button,
.primary-button {
    border-radius: var(--radius-buttons);
    transition: background 140ms ease, color 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.ghost-button {
    background: transparent;
    color: var(--ink);
    border-color: var(--button-border);
}

.ghost-button:hover {
    border-color: var(--ink);
    transform: translateY(-1px);
}

.ghost-button.active,
.primary-button {
    border-color: var(--ink);
    background: var(--ink);
    color: var(--paper);
}

.primary-button:hover {
    background: var(--ink);
    border-color: var(--ink);
}

.chart-icon-button,
.chart-close {
    color: var(--ink);
}

.layer-row {
    border-color: var(--surface-border-soft);
    background: color-mix(in srgb, var(--panel-bg) 72%, transparent);
}

.layer-row.layer-glass {
    background: linear-gradient(90deg, rgba(31, 154, 165, 0.18), color-mix(in srgb, var(--panel-bg) 74%, transparent));
}

.layer-row.layer-coating {
    background: linear-gradient(90deg, rgba(215, 25, 32, 0.16), color-mix(in srgb, var(--panel-bg) 74%, transparent));
}

.layer-row.layer-cavity {
    background: linear-gradient(90deg, rgba(211, 155, 55, 0.18), color-mix(in srgb, var(--panel-bg) 74%, transparent));
}

.layer-row.layer-interlayer {
    background: linear-gradient(90deg, rgba(36, 65, 95, 0.18), color-mix(in srgb, var(--panel-bg) 74%, transparent));
}

.diagram-stage,
.visualizer-frame-shell,
.summary-visual {
    border-color: var(--surface-border);
    background:
        var(--panel-wash),
        var(--chart-surface);
}

.metric-card {
    border: 1px solid var(--surface-border-soft);
    background: color-mix(in srgb, var(--chart-surface) 72%, transparent);
}

.metric-card span,
.data-card h3 {
    color: var(--ink);
}

.metric-card strong {
    color: var(--ui-accent);
    font-family: var(--font-editorial);
    font-weight: 700;
}

.data-card {
    position: relative;
    border: 1px solid var(--surface-border);
    border-top-color: var(--card-top-border);
    background: var(--chart-surface);
    box-shadow: inset 0 1px 0 color-mix(in srgb, var(--ink) 6%, transparent);
}

.data-card h3 {
    border-bottom-color: var(--surface-border-soft);
    text-transform: none;
    font-family: var(--font-editorial);
    font-size: 16px;
    letter-spacing: -0.02em;
}

.data-row {
    border-bottom-color: var(--surface-border-soft);
}

.data-row strong {
    color: var(--blue-strong);
}

.modal-backdrop {
    background: rgba(0, 0, 0, 0.58);
    backdrop-filter: blur(10px);
}

.modal-panel {
    border-color: rgba(255, 255, 255, 0.22);
    background:
        radial-gradient(circle at 20% 0%, var(--modal-orb-a), transparent 26rem),
        radial-gradient(circle at 80% 5%, var(--modal-orb-b), transparent 24rem),
        var(--modal-surface);
}

.plot-card,
.plot-results,
.plot-control-card {
    position: relative;
    border: 1px solid var(--surface-border);
    background: var(--chart-surface);
}

.plot-card {
    border-width: 1px;
}

.plot-chart {
    background:
        var(--chart-sheen),
        var(--chart-surface);
}

.plot-grid {
    background:
        linear-gradient(to right, var(--chart-grid) 1px, transparent 1px),
        linear-gradient(to top, var(--chart-grid) 1px, transparent 1px);
    background-size: 20% 20%;
    border-left: 2px solid var(--plot-axis-strong);
    border-bottom: 2px solid var(--plot-axis-strong);
}

.plot-axis,
.plot-x-ticks,
.plot-y-ticks {
    color: var(--plot-axis);
}

.legend-gradient-bar {
    background: linear-gradient(90deg, #e0edee, #84c3be, #f6b96b, #e76f51, #be1821);
    border-color: var(--surface-border-soft);
}

.legend-swatch.single,
.plot-point.single {
    background: #d73027;
}

.legend-swatch.double,
.plot-point.double {
    background: #1f9aa5;
}

.legend-swatch.triple,
.plot-point.triple {
    background: #24415f;
}

.plot-point {
    border-color: var(--point-edge);
    opacity: var(--point-opacity);
}

.plot-point:hover,
.plot-point.selected {
    border-color: #fff;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--ui-accent) 28%, transparent), 0 4px 12px rgba(0, 0, 0, 0.24);
}

.plot-entry {
    border-color: var(--surface-border-soft);
    background: color-mix(in srgb, var(--chart-surface) 72%, transparent);
}

.plot-entry:hover,
.plot-entry.selected {
    background: var(--panel-soft);
}

.plot-entry.selected {
    border-color: var(--ui-accent-border);
}

.plot-rank {
    background: var(--ui-accent);
    color: var(--chart-surface) !important;
    justify-self: start;
    align-self: start;
    padding: 2px 7px;
    border-radius: 999px;
    line-height: 1.2;
}

.plot-range-track {
    background: color-mix(in srgb, var(--plot-axis) 20%, transparent);
}

.plot-range-active {
    background: var(--ui-accent);
}

.plot-range-slider input[type="range"]::-webkit-slider-thumb {
    background: var(--ui-accent);
}

.plot-range-slider input[type="range"]::-moz-range-thumb {
    background: var(--ui-accent);
}

.spectrum-grid-lines line {
    stroke: var(--chart-grid);
}

.spectrum-axes line {
    stroke: var(--plot-axis-strong);
}

.spectrum-axes text,
.axis-title {
    fill: var(--plot-axis);
}

.legend-line.transmittance,
.spectrum-line.transmittance,
.spectrum-dot.transmittance {
    color: #1f9aa5;
    background: #1f9aa5;
    stroke: #1f9aa5;
    fill: #1f9aa5;
}

.legend-line.reflectance-front,
.spectrum-line.reflectance-front,
.spectrum-dot.reflectance-front {
    color: #d73027;
    background: #d73027;
    stroke: #d73027;
    fill: #d73027;
}

.legend-line.reflectance-back,
.spectrum-line.reflectance-back,
.spectrum-dot.reflectance-back {
    color: #d39b37;
    background: #d39b37;
    stroke: #d39b37;
    fill: #d39b37;
}

.spectrum-tooltip {
    border-color: var(--surface-border);
    background: color-mix(in srgb, var(--chart-surface) 94%, transparent);
    box-shadow: none;
}

:root[data-theme="dark"] .panel-head p,
:root[data-theme="dark"] .modal-head-plot p,
:root[data-theme="dark"] .chart-meta,
:root[data-theme="dark"] .page-footer,
:root[data-theme="dark"] .field-note,
:root[data-theme="dark"] .plot-list,
:root[data-theme="dark"] .plot-results-head span,
:root[data-theme="dark"] .plot-entry span,
:root[data-theme="dark"] .metric-card small,
:root[data-theme="dark"] .layer-row-meta,
:root[data-theme="dark"] .plot-filter-head span,
:root[data-theme="dark"] .plot-range-values output,
:root[data-theme="dark"] .spectrum-legend span,
:root[data-theme="dark"] .plot-rank-field,
:root[data-theme="dark"] .plot-field {
    color: var(--muted);
}

:root[data-theme="dark"] .panel-head h2,
:root[data-theme="dark"] .panel-head h3,
:root[data-theme="dark"] .modal-head-plot h2,
:root[data-theme="dark"] .plot-results-head h3,
:root[data-theme="dark"] .plot-control-card h3,
:root[data-theme="dark"] .plot-filter-head strong,
:root[data-theme="dark"] .plot-entry strong,
:root[data-theme="dark"] .metric-card span,
:root[data-theme="dark"] .data-card h3,
:root[data-theme="dark"] .data-row,
:root[data-theme="dark"] .plot-selected-card strong,
:root[data-theme="dark"] .plot-selected-metrics span,
:root[data-theme="dark"] .plot-chip span,
:root[data-theme="dark"] .manufacturer-chip span {
    color: var(--ink);
}

:root[data-theme="dark"] .plot-selected-detail,
:root[data-theme="dark"] .plot-selected-metrics span,
:root[data-theme="dark"] .plot-list-note,
:root[data-theme="dark"] .plot-filter,
:root[data-theme="dark"] .plot-filter-categorical {
    border-color: var(--surface-border-soft);
    background: color-mix(in srgb, var(--panel-soft) 70%, transparent);
}

:root[data-theme="dark"] .plot-chip,
:root[data-theme="dark"] .manufacturer-chip,
:root[data-theme="dark"] .plot-entry,
:root[data-theme="dark"] .plot-selected-card,
:root[data-theme="dark"] .plot-list {
    border-color: var(--surface-border-soft);
    background: color-mix(in srgb, var(--chart-surface) 84%, transparent);
}

:root[data-theme="dark"] .plot-chip span,
:root[data-theme="dark"] .manufacturer-chip span {
    border-color: var(--surface-border-soft);
    background: color-mix(in srgb, var(--chart-surface) 82%, transparent);
}

:root[data-theme="dark"] .plot-chip input:checked + span,
:root[data-theme="dark"] .manufacturer-chip input:checked + span {
    border-color: var(--ui-accent-border);
    background: var(--ui-accent-soft);
    color: var(--ink);
}

:root[data-theme="dark"] .plot-entry:hover,
:root[data-theme="dark"] .plot-entry.selected {
    background: color-mix(in srgb, var(--panel-soft) 82%, transparent);
}

:root[data-theme="dark"] .ghost-button-small,
:root[data-theme="dark"] .chart-close,
:root[data-theme="dark"] .chart-icon-button {
    color: var(--ink);
}

/* Updated DESIGN.md direction: achromatic UI, color reserved for data plots. */
:root {
    --bg: #f3f3f3;
    --panel: #ffffff;
    --panel-soft: #f1f1f1;
    --text: #000000;
    --muted: #666666;
    --line: #e5e7eb;
    --card-top-border: #c8cdd3;
    --ink: #000000;
    --paper: #ffffff;
    --paper-cool: #f1f1f1;
    --chart-grid: rgba(0, 0, 0, 0.10);
    --plot-axis: rgba(0, 0, 0, 0.68);
    --plot-axis-strong: rgba(0, 0, 0, 0.62);
    --glass-edge: #e5e7eb;
    --surface-border: #e5e7eb;
    --surface-border-soft: #e5e7eb;
    --input-bg: #ffffff;
    --button-border: rgba(0, 0, 0, 0.12);
    --ui-accent: #3b6ea8;
    --ui-accent-soft: rgba(59, 110, 168, 0.08);
    --ui-accent-border: rgba(59, 110, 168, 0.34);
    --layer-glass: #3b82c4;
    --layer-coating: #9a5cc2;
    --layer-cavity: #249b82;
    --layer-interlayer: #b6811f;
    --layer-glass-bg: rgba(59, 130, 196, 0.09);
    --layer-coating-bg: rgba(154, 92, 194, 0.09);
    --layer-cavity-bg: rgba(36, 155, 130, 0.09);
    --layer-interlayer-bg: rgba(182, 129, 31, 0.10);
    --hero-text: #000000;
    --hero-muted: #666666;
    --hero-overlay: none;
    --chart-surface: #ffffff;
    --chart-sheen: none;
    --panel-bg: #ffffff;
    --panel-wash: none;
    --modal-surface: #ffffff;
    --modal-orb-a: transparent;
    --modal-orb-b: transparent;
    --body-atmosphere: none;
    --point-edge: rgba(0, 0, 0, 0.14);
    --point-opacity: 0.64;
    --font-roobert: "OpenAI Sans", "Aptos", "Segoe UI", sans-serif;
    --font-editorial: var(--font-roobert);
    --radius-cards: 6.08px;
    --radius-controls: 6.08px;
    --radius-buttons: 6.08px;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0f0f0f;
    --panel: #181818;
    --panel-soft: #202020;
    --text: #e8e8e8;
    --muted: #a8a8a8;
    --line: rgba(255, 255, 255, 0.14);
    --card-top-border: rgba(255, 255, 255, 0.22);
    --ink: #e8e8e8;
    --paper: #181818;
    --paper-cool: #202020;
    --chart-grid: rgba(255, 255, 255, 0.12);
    --plot-axis: rgba(232, 232, 232, 0.70);
    --plot-axis-strong: rgba(232, 232, 232, 0.64);
    --glass-edge: rgba(255, 255, 255, 0.16);
    --surface-border: rgba(255, 255, 255, 0.14);
    --surface-border-soft: rgba(255, 255, 255, 0.10);
    --input-bg: #202020;
    --button-border: rgba(255, 255, 255, 0.20);
    --ui-accent: #8fb7d7;
    --ui-accent-soft: rgba(143, 183, 215, 0.16);
    --ui-accent-border: rgba(143, 183, 215, 0.42);
    --layer-glass: #78b8f3;
    --layer-coating: #c58de2;
    --layer-cavity: #62c9b3;
    --layer-interlayer: #d6a747;
    --layer-glass-bg: rgba(120, 184, 243, 0.30);
    --layer-coating-bg: rgba(197, 141, 226, 0.30);
    --layer-cavity-bg: rgba(98, 201, 179, 0.28);
    --layer-interlayer-bg: rgba(214, 167, 71, 0.28);
    --hero-text: #e8e8e8;
    --hero-muted: #a8a8a8;
    --chart-surface: #181818;
    --panel-bg: #181818;
    --panel-wash: none;
    --modal-surface: #181818;
    --body-atmosphere: none;
    --point-edge: rgba(255, 255, 255, 0.18);
    --point-opacity: 0.78;
}

.hero::before,
.panel::before,
.data-card::before,
.plot-card::before,
.plot-results::before {
    display: none;
}

.hero {
    min-height: auto;
    border-color: var(--surface-border);
    background: var(--panel-bg);
}

.hero h1 {
    color: var(--hero-text);
    font-family: var(--font-roobert);
    font-size: clamp(44px, 7vw, 76px);
    font-weight: 500;
    letter-spacing: -0.05em;
}

.hero p {
    color: var(--hero-muted);
}

.panel,
.hero,
.modal-panel,
.plot-card,
.plot-results,
.plot-control-card,
.summary-visual,
.data-card,
.metric-card,
.layer-row,
.visualizer-frame-shell,
.diagram-stage {
    border-radius: var(--radius-cards);
    border-color: var(--surface-border);
}

button,
select,
input,
.ghost-button,
.primary-button,
.ghost-button-small,
.theme-toggle,
.theme-toggle-compact,
.plot-chip span,
.manufacturer-chip span,
.plot-entry,
.plot-filter,
.plot-selected-card,
.plot-selected-metrics span,
.plot-list-note,
.data-card,
.metric-card {
    border-radius: var(--radius-controls);
}

.panel,
.modal-panel,
.plot-card,
.plot-results,
.plot-control-card,
.summary-visual,
.data-card,
.metric-card {
    background: var(--panel-bg);
}

.data-card {
    border-top-color: var(--card-top-border);
}

select,
input,
.layer-row-main select,
.layer-row-main input {
    background: var(--input-bg);
    color: var(--ink);
    border-color: var(--surface-border);
}

.layer-row {
    color: var(--ink);
    border-color: var(--surface-border);
    background: var(--panel-soft);
    box-shadow: none;
}

.layer-row.layer-glass,
.layer-row.layer-coating,
.layer-row.layer-cavity,
.layer-row.layer-interlayer {
    border-color: var(--surface-border) !important;
    background-image: none !important;
}

.layer-row.layer-glass {
    background-color: var(--layer-glass-bg) !important;
}

.layer-row.layer-coating {
    background-color: var(--layer-coating-bg) !important;
}

.layer-row.layer-cavity {
    background-color: var(--layer-cavity-bg) !important;
}

.layer-row.layer-interlayer {
    background-color: var(--layer-interlayer-bg) !important;
}

.layer-row-index,
.layer-row-delete,
.layer-row-main select,
.layer-row-main input {
    color: var(--ink);
}

.layer-row-main select,
.layer-row-main input {
    border-radius: var(--radius-controls) !important;
    background-color: var(--input-bg) !important;
    background-image: none !important;
    color: var(--ink) !important;
}

.ghost-button,
.theme-toggle,
.theme-toggle-compact {
    background: transparent;
    color: var(--ink);
    border-color: var(--button-border);
}

.ghost-button:hover,
.theme-toggle:hover,
.theme-toggle-compact:hover {
    background: var(--panel-soft);
}

.primary-button,
.ghost-button.active {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--chart-surface);
}

.plot-chip input:checked + span,
.manufacturer-chip input:checked + span {
    border-color: var(--ui-accent-border) !important;
    background: var(--ui-accent-soft) !important;
    color: var(--ink) !important;
}

.primary-button:hover {
    background: var(--ink);
    border-color: var(--ink);
}

.add-button,
.add-glass,
.add-coating,
.add-cavity,
.add-interlayer {
    border-color: var(--surface-border);
    background: var(--input-bg);
    color: var(--ink);
}

.add-glass {
    border-color: var(--layer-glass);
    color: var(--layer-glass);
}

.add-coating {
    border-color: var(--layer-coating);
    color: var(--layer-coating);
}

.add-cavity {
    border-color: var(--layer-cavity);
    color: var(--layer-cavity);
}

.add-interlayer {
    border-color: var(--layer-interlayer);
    color: var(--layer-interlayer);
}

.add-button:hover {
    background: var(--panel-soft);
}

.plot-chart,
.summary-visual,
.diagram-stage,
.visualizer-frame-shell {
    background: var(--chart-surface);
}

:root[data-theme="dark"] .diagram-stage {
    background: #202020;
}

:root[data-theme="dark"] .diagram-labels {
    color: #a8a8a8;
}

:root[data-theme="dark"] .diagram-layer {
    box-shadow:
        inset 0 0 0 1px rgba(0, 0, 0, 0.34),
        0 0 0 1px rgba(232, 232, 232, 0.26);
}

:root[data-theme="dark"] .diagram-layer.cavity {
    border-color: rgba(232, 232, 232, 0.34) !important;
}

.plot-rank,
.plot-range-active,
.plot-range-slider input[type="range"]::-webkit-slider-thumb,
.plot-range-slider input[type="range"]::-moz-range-thumb {
    background: var(--ui-accent);
}

.plot-rank {
    color: var(--chart-surface) !important;
}

.spectrum-line {
    fill: none !important;
}

.plot-rank {
    border-radius: 2px;
}

.plot-range-track,
.plot-range-active {
    border-radius: 2px;
}

@media (max-width: 1180px) {
    .top-grid,
    .plot-layout,
    .spectrum-grid,
    .data-grid {
        grid-template-columns: 1fr;
    }

    .panel-layers {
        min-height: 0;
    }
}

@media print {
    @page {
        size: A4 landscape;
        margin: 10mm;
    }

    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }

    body {
        background: #fff !important;
    }

    .page-shell {
        width: 100% !important;
        padding: 0 !important;
    }

    .hero {
        padding: 0 0 10px 0 !important;
    }

    .hero h1 {
        font-size: 34px !important;
    }

    .hero p,
    .page-footer,
    .panel-actions,
    .panel-actions-top,
    .add-layer-grid,
    .stack-status,
    .panel-visualizer .panel-head p,
    .chart-icon-button,
    .layer-row-delete,
    .visualizer-controls,
    .modal-shell {
        display: none !important;
    }

    .data-actions {
        display: none !important;
    }

    .panel {
        box-shadow: none !important;
        break-inside: avoid;
        page-break-inside: avoid;
    }

    .top-grid {
        display: grid !important;
        grid-template-columns: 0.92fr 1.28fr !important;
        gap: 12px !important;
        break-after: page;
        page-break-after: always;
    }

    .top-right-stack {
        gap: 12px !important;
    }

    .panel-head {
        padding: 12px 14px 0 !important;
    }

    .panel-head h2 {
        font-size: 18px !important;
    }

    .panel-layers {
        height: auto !important;
    }

    .layer-list {
        padding: 10px 14px 14px !important;
    }

    .layer-row {
        grid-template-columns: 30px minmax(0, 1fr) !important;
        gap: 8px !important;
        padding: 6px 8px !important;
        margin-bottom: 6px !important;
        border-radius: 4px !important;
    }

    .layer-row-main {
        display: none !important;
    }

    .layer-print-summary {
        display: grid !important;
        gap: 2px;
        font-size: 11px;
        color: #2f3448;
    }

    .layer-print-summary strong {
        font-size: 11px;
    }

    .layer-print-summary span {
        color: #596176;
    }

    .diagram-stage {
        margin: 12px 14px 14px !important;
        min-height: 170px !important;
        overflow: visible !important;
    }

    .diagram-track {
        inset: 36px 12px 12px 12px !important;
        overflow: visible !important;
    }

    .diagram-layer {
        min-width: 18px !important;
        box-shadow: inset 0 0 0 1px rgba(85, 145, 171, 0.2) !important;
    }

    .metric-grid {
        padding: 12px 14px 14px !important;
        grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
        gap: 8px !important;
    }

    .metric-card {
        padding: 8px 10px !important;
        min-height: 0 !important;
        border-radius: 4px !important;
        gap: 7px !important;
        align-content: start !important;
    }

    .metric-card span {
        font-size: 10px !important;
        line-height: 1.15 !important;
    }

    .metric-card strong {
        font-size: 13px !important;
        line-height: 1.1 !important;
        letter-spacing: -0.02em !important;
        margin-top: 2px !important;
    }

    .metric-card small {
        display: none !important;
    }

    .panel-visualizer {
        break-after: page;
        page-break-after: always;
    }

    .visualizer-frame-shell {
        height: 150mm !important;
        aspect-ratio: auto !important;
        margin: 12px 14px 14px !important;
    }

    #visualizer-before,
    #visualizer-after {
        height: 150mm !important;
    }

    .panel-spectrum {
        break-after: page;
        page-break-after: always;
    }

    .spectrum-grid {
        padding: 12px 14px 14px !important;
    }

    .summary-visual {
        padding: 14px !important;
        min-height: 0 !important;
        break-inside: avoid;
    }

    .spectrum-plot {
        min-height: 0 !important;
    }

    .spectrum-svg {
        max-height: 145mm;
    }

    .data-grid {
        padding: 12px 14px 14px !important;
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 10px !important;
    }

    .data-card {
        break-inside: avoid;
        page-break-inside: avoid;
        box-shadow: none !important;
    }

    .data-card h3 {
        padding: 10px 12px 8px !important;
        font-size: 12px !important;
    }

    .data-card-body {
        padding: 4px 12px 10px !important;
    }

    .data-row {
        padding: 7px 0 !important;
        font-size: 11px !important;
    }
}

@media (max-width: 880px) {
    .page-shell {
        width: calc(100% - 24px);
    }

    .visualizer-frame-shell {
        --visualizer-frame-height: max(420px, min(540px, 45vw));
        height: var(--visualizer-frame-height);
        aspect-ratio: auto;
    }

    .modal-panel {
        width: calc(100% - 16px);
        margin: 8px auto;
        max-height: calc(100dvh - 16px);
    }

    .modal-head-plot {
        position: relative;
        display: block;
        padding: 14px 12px 8px;
    }

    .modal-head-plot h2 {
        padding-right: 156px;
    }

    .modal-head-actions {
        position: absolute;
        top: 12px;
        right: 12px;
        max-width: calc(100% - 24px);
    }

    .hero {
        align-items: flex-start;
        flex-direction: column;
        gap: 18px;
        overflow: visible;
        padding: 24px;
    }

    .hero h1 {
        font-size: 42px;
    }

    .theme-toggle {
        align-self: flex-start;
        min-width: 0;
        max-width: 100%;
    }

    .visualizer-controls,
    .metric-grid,
    .detail-grid,
    .add-layer-grid {
        grid-template-columns: 1fr;
    }

    .panel-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .keep-updated-toggle {
        justify-content: flex-end;
    }

    .layer-inline-fields {
        grid-template-columns: 1fr;
    }

    .diagram-stage {
        margin: 16px 12px 18px;
    }

    .diagram-track {
        inset: 44px 10px 14px 10px;
        padding-bottom: 12px;
        scrollbar-width: thin;
    }

    .diagram-layer {
        touch-action: pan-x;
    }

    .spectrum-grid {
        padding: 16px 12px 14px;
    }

    .summary-visual {
        min-height: 0;
        padding: 12px;
    }

    .spectrum-card {
        gap: 8px;
    }

    .spectrum-legend {
        justify-content: flex-start;
    }

    .spectrum-plot {
        min-height: 0;
    }

    .spectrum-tooltip {
        width: 108px;
        padding: 5px 6px;
        gap: 1px 6px;
        font-size: 10px;
        box-shadow: 0 7px 18px rgba(34, 39, 63, 0.12);
    }

    .plot-layout {
        padding: 10px 12px 18px;
        gap: 14px;
    }

    .plot-card {
        padding: 10px 8px 14px;
    }

    .plot-chart-tools {
        padding-left: 8px;
        align-items: flex-start;
        flex-direction: column;
    }

    .plot-legend {
        gap: 8px 10px;
    }

    .plot-chart {
        height: 320px;
        min-height: 320px;
    }

    .plot-grid,
    .plot-points {
        inset: 24px 14px 58px 54px;
    }

    .plot-x-ticks {
        left: 54px;
        right: 14px;
        bottom: 20px;
    }

    .plot-y-ticks {
        top: 24px;
        bottom: 58px;
        width: 48px;
    }

    .axis-x,
    .axis-y {
        display: none;
    }

    .plot-point {
        width: 8px;
        height: 8px;
        min-width: 8px;
        min-height: 8px;
        margin-left: -4px;
        margin-top: -4px;
        border-width: 1px;
        opacity: 0.68;
    }

    .plot-results-head {
        align-items: stretch;
        flex-direction: column;
    }

    .plot-rank-field {
        justify-content: space-between;
        white-space: normal;
    }

    .plot-rank-field select {
        max-width: 100%;
    }

    .plot-selected-card {
        grid-template-columns: 1fr;
        align-items: stretch;
    }
}

@media (max-width: 520px) {
    .modal-head-plot h2 {
        padding-right: 46px;
    }

    .modal-head-actions .theme-toggle-compact {
        display: none;
    }

    .plot-chart {
        height: 280px;
        min-height: 280px;
    }
}