/* Structure builder: full-screen application layout.
   Shares colour tokens with css/site.css. */

:root {
    --app-bg: #eef0f3;
    --panel: #ffffff;
    --panel-2: #f6f7f9;
    --line: #e2e5ea;
    --ink: #1f242b;
    --ink-2: #5d6673;
    --ink-3: #8c95a1;
    --accent: #1a5e8a;
    --accent-2: #2f7de1;
    --accent-soft: #e6f0f8;
    --danger: #b42318;
    --ok: #1f7a4d;
    --radius: 8px;
    --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --serif: "Source Serif 4", Georgia, serif;
    --mono: ui-monospace, "SFMono-Regular", Consolas, monospace;
    color-scheme: light;
}

:root[data-theme="dark"] {
    --app-bg: #111316;
    --panel: #1a1d21;
    --panel-2: #22262b;
    --line: #2f343a;
    --ink: #e6e8eb;
    --ink-2: #a8b0ba;
    --ink-3: #7b848f;
    --accent: #8cc1e6;
    --accent-2: #5aa7ec;
    --accent-soft: #1d3345;
    --danger: #f07167;
    --ok: #5cc28f;
    color-scheme: dark;
}

* {
    box-sizing: border-box;
}

html,
body.studio {
    height: 100%;
    margin: 0;
}

body.studio {
    display: grid;
    grid-template-rows: auto 1fr auto;
    background: var(--app-bg);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 13px;
    line-height: 1.45;
    overflow: hidden;
}

button,
input,
select {
    font: inherit;
    color: inherit;
}

/* ---------- Top bar ---------- */

.topbar {
    display: flex;
    align-items: center;
    gap: 14px;
    height: 52px;
    padding: 0 14px;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
    z-index: 20;
}

/* Home link and the switcher between the web tools. */
.home-link {
    font-family: var(--serif);
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
    text-decoration: none;
    white-space: nowrap;
}

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

.app-tabs {
    display: flex;
    gap: 2px;
    padding: 3px;
    border: 1px solid var(--line);
    border-radius: 9px;
    background: var(--panel-2);
}

.app-tabs a {
    padding: 4px 11px;
    border-radius: 6px;
    font-size: 13px;
    line-height: 20px;
    color: var(--ink-2);
    text-decoration: none;
    white-space: nowrap;
    transition: background 0.15s ease, color 0.15s ease;
}

.app-tabs a b {
    font-weight: 600;
}

.app-tabs a span {
    color: inherit;
    opacity: 0.75;
}

.app-tabs a:hover {
    color: var(--ink);
    background: color-mix(in srgb, var(--ink) 6%, transparent);
}

.app-tabs a[aria-current="page"] {
    color: #fff;
    background: linear-gradient(135deg, var(--chip-a), var(--chip-b));
    box-shadow: 0 1px 4px color-mix(in srgb, var(--chip-a) 30%, transparent);
}

.toolbar {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
    flex-wrap: nowrap;
}

.tb-sep {
    width: 1px;
    height: 22px;
    background: var(--line);
    margin: 0 6px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 30px;
    padding: 0 10px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--panel);
    color: var(--ink);
    cursor: pointer;
    white-space: nowrap;
    transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.btn:hover {
    background: var(--panel-2);
    border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
}

.btn:disabled {
    opacity: 0.45;
    cursor: default;
}

.btn.icon {
    width: 30px;
    padding: 0;
}

.btn.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--panel);
    font-weight: 600;
}

.btn.primary:hover {
    background: color-mix(in srgb, var(--accent) 85%, black);
}

.btn.ghost {
    border-color: transparent;
    background: transparent;
}

.btn.ghost:hover {
    background: var(--panel-2);
}

.btn.danger {
    color: var(--danger);
}

.btn.block {
    width: 100%;
    height: 34px;
}

.btn[aria-pressed="true"] {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
}

.btn svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.menu {
    position: relative;
}

.menu-list {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 210px;
    padding: 6px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 12px 32px rgb(0 0 0 / 14%);
    display: none;
    z-index: 50;
}

.menu.open .menu-list {
    display: block;
}

.menu-list button {
    display: flex;
    width: 100%;
    justify-content: space-between;
    gap: 16px;
    padding: 7px 10px;
    border: 0;
    border-radius: 5px;
    background: none;
    text-align: left;
    cursor: pointer;
}

.menu-list button:hover {
    background: var(--panel-2);
}

.menu-list .hint {
    color: var(--ink-3);
    font-size: 11.5px;
}

.menu-list hr {
    border: 0;
    border-top: 1px solid var(--line);
    margin: 5px 0;
}

.menu-title {
    padding: 6px 10px 2px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-3);
}

/* ---------- Workspace ---------- */

.workspace {
    display: grid;
    grid-template-columns: 340px 1fr;
    min-height: 0;
}

.panel {
    display: flex;
    flex-direction: column;
    min-height: 0;
    background: var(--panel);
    border-right: 1px solid var(--line);
}

.tab-body[hidden] {
    display: none;
}

.note {
    color: var(--ink-2);
    font-size: 12px;
    margin: 0;
}

.note.warn {
    color: var(--danger);
}

.row {
    display: grid;
    gap: 8px;
    align-items: end;
}

.row.c2 { grid-template-columns: 1fr 1fr; }
.row.c3 { grid-template-columns: 1fr 1fr 1fr; }
.row.c4 { grid-template-columns: 1fr 1fr 1fr 1fr; }

.field {
    display: grid;
    gap: 4px;
    min-width: 0;
}

.field>span {
    font-size: 11.5px;
    color: var(--ink-2);
}

.field input,
.field select,
.input {
    width: 100%;
    height: 30px;
    padding: 0 8px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--panel-2);
    color: var(--ink);
    min-width: 0;
}

.field input:focus,
.field select:focus,
.input:focus {
    outline: 2px solid color-mix(in srgb, var(--accent-2) 45%, transparent);
    outline-offset: -1px;
    border-color: var(--accent-2);
    background: var(--panel);
}

.field input:disabled {
    opacity: 0.55;
}

.check {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.check input {
    accent-color: var(--accent);
    width: 15px;
    height: 15px;
}

.range {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 4px 10px;
}

.range>span {
    grid-column: 1 / -1;
    font-size: 11.5px;
    color: var(--ink-2);
}

.range input {
    accent-color: var(--accent);
    width: 100%;
}

.range output {
    font-family: var(--mono);
    font-size: 11.5px;
    color: var(--ink-2);
    min-width: 38px;
    text-align: right;
}

.seg {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
    padding: 3px;
    background: var(--panel-2);
    border: 1px solid var(--line);
    border-radius: 7px;
}

.seg button {
    height: 26px;
    border: 0;
    border-radius: 5px;
    background: none;
    color: var(--ink-2);
    cursor: pointer;
    font-size: 12px;
}

.seg button[aria-pressed="true"] {
    background: var(--panel);
    color: var(--ink);
    font-weight: 600;
    box-shadow: 0 1px 3px rgb(0 0 0 / 12%);
}

/* Site / facet tables */
.table {
    display: grid;
    gap: 4px;
}

.table .tr {
    display: grid;
    grid-template-columns: 58px 1fr 1fr 1fr 26px;
    gap: 4px;
    align-items: center;
}

.table .tr.head {
    font-size: 11px;
    color: var(--ink-3);
}

.table .tr input {
    height: 28px;
    padding: 0 6px;
    border: 1px solid var(--line);
    border-radius: 5px;
    background: var(--panel-2);
    width: 100%;
    min-width: 0;
    font-family: var(--mono);
    font-size: 12px;
}

.table.facets .tr {
    grid-template-columns: 1fr 1fr 1fr 1.2fr 26px;
}

.table.solutes .tr {
    grid-template-columns: 1fr 1.4fr 26px;
}

.x-btn {
    width: 26px;
    height: 26px;
    border: 0;
    border-radius: 5px;
    background: none;
    color: var(--ink-3);
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
}

.x-btn:hover {
    background: var(--panel-2);
    color: var(--danger);
}

.link-btn {
    justify-self: start;
    border: 0;
    background: none;
    color: var(--accent);
    cursor: pointer;
    padding: 0;
    font-weight: 500;
}

.matrix {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}

.matrix input {
    height: 28px;
    text-align: center;
    border: 1px solid var(--line);
    border-radius: 5px;
    background: var(--panel-2);
    font-family: var(--mono);
    min-width: 0;
}

.gb-list {
    max-height: 170px;
    overflow-y: auto;
    border: 1px solid var(--line);
    border-radius: 6px;
}

.gb-list button {
    display: grid;
    grid-template-columns: 52px 1fr auto;
    width: 100%;
    padding: 6px 10px;
    border: 0;
    border-bottom: 1px solid var(--line);
    background: none;
    text-align: left;
    cursor: pointer;
    font-family: var(--mono);
    font-size: 12px;
}

.gb-list button:last-child {
    border-bottom: 0;
}

.gb-list button:hover {
    background: var(--panel-2);
}

.gb-list button[aria-pressed="true"] {
    background: var(--accent-soft);
    color: var(--accent);
}

/* Legend */
.legend {
    display: grid;
    gap: 2px;
}

.legend .li {
    display: grid;
    grid-template-columns: 22px 1fr auto 26px;
    align-items: center;
    gap: 8px;
    padding: 4px 4px;
    border-radius: 5px;
}

.legend .li:hover {
    background: var(--panel-2);
}

.legend input[type="color"] {
    width: 22px;
    height: 22px;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 50%;
    overflow: hidden;
    cursor: pointer;
    background: none;
}

.legend input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.legend input[type="color"]::-webkit-color-swatch {
    border: 0;
    border-radius: 50%;
}

.legend .count {
    font-family: var(--mono);
    color: var(--ink-3);
    font-size: 11.5px;
}

.eye {
    width: 26px;
    height: 26px;
    border: 0;
    border-radius: 5px;
    background: none;
    cursor: pointer;
    color: var(--ink-2);
}

.eye[aria-pressed="false"] {
    color: var(--ink-3);
    opacity: 0.5;
}

.kv {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 4px 12px;
    font-size: 12.5px;
}

.kv dt {
    color: var(--ink-2);
}

.kv dd {
    margin: 0;
    font-family: var(--mono);
    font-size: 12px;
    text-align: right;
}

.plot {
    width: 100%;
    height: auto;
    aspect-ratio: 600 / 380;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--panel-2);
}

.measure-list {
    display: grid;
    gap: 4px;
    font-family: var(--mono);
    font-size: 12px;
}

.measure-list div {
    display: flex;
    justify-content: space-between;
    padding: 5px 8px;
    border-radius: 5px;
    background: var(--panel-2);
}

/* ---------- Viewport ---------- */

.viewport {
    position: relative;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
}

.viewport-canvas {
    position: absolute;
    inset: 0;
    width: 100% !important;
    height: 100% !important;
    display: block;
    outline: none;
}

.label-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.vlabel {
    position: absolute;
    left: 0;
    top: 0;
    padding: 2px 7px;
    border-radius: 4px;
    background: rgb(20 24 28 / 82%);
    color: #fff;
    font-family: var(--mono);
    font-size: 11.5px;
    white-space: nowrap;
}

.vlabel.el {
    background: none;
    color: var(--ink);
    font-family: var(--sans);
    font-weight: 600;
    text-shadow: 0 0 3px var(--app-bg), 0 0 3px var(--app-bg);
    transform-origin: center;
}

.axes-gizmo {
    position: absolute;
    left: 10px;
    bottom: 10px;
    width: 90px;
    height: 90px;
    pointer-events: none;
}

.hud {
    position: absolute;
    top: 12px;
    left: 14px;
    right: 14px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    pointer-events: none;
}

.hud>* {
    pointer-events: auto;
}

.hud-title {
    max-width: 50%;
}

.hud-title b {
    display: block;
    font-family: var(--serif);
    font-size: 17px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.hud-title span {
    color: var(--ink-2);
    font-size: 12px;
}

.floating {
    display: flex;
    gap: 2px;
    padding: 3px;
    background: color-mix(in srgb, var(--panel) 92%, transparent);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgb(0 0 0 / 8%);
    backdrop-filter: blur(6px);
}

.floating .btn {
    height: 28px;
    border-color: transparent;
    background: transparent;
    font-size: 12px;
}

.floating .btn:hover {
    background: var(--panel-2);
}

.floating .btn[aria-pressed="true"] {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: transparent;
}

.modebar {
    position: absolute;
    left: 50%;
    bottom: 14px;
    transform: translateX(-50%);
}

.view-tools {
    flex-direction: column;
}

.hover-card {
    position: absolute;
    z-index: 5;
    min-width: 170px;
    padding: 8px 10px;
    background: color-mix(in srgb, var(--panel) 95%, transparent);
    border: 1px solid var(--line);
    border-radius: 7px;
    box-shadow: 0 8px 22px rgb(0 0 0 / 12%);
    pointer-events: none;
    font-size: 12px;
    display: none;
}

.hover-card b {
    font-size: 13px;
}

.hover-card .mono {
    font-family: var(--mono);
    font-size: 11.5px;
    color: var(--ink-2);
}

.select-rect {
    position: absolute;
    border: 1px solid var(--accent-2);
    background: color-mix(in srgb, var(--accent-2) 12%, transparent);
    pointer-events: none;
    display: none;
    z-index: 4;
}

.drop-overlay {
    position: absolute;
    inset: 12px;
    display: none;
    place-items: center;
    border: 2px dashed var(--accent-2);
    border-radius: 12px;
    background: color-mix(in srgb, var(--accent-2) 8%, transparent);
    font-size: 16px;
    font-weight: 600;
    color: var(--accent);
    z-index: 10;
}

.viewport.dragging .drop-overlay {
    display: grid;
}

.busy {
    position: absolute;
    inset: 0;
    display: none;
    place-items: center;
    background: color-mix(in srgb, var(--app-bg) 55%, transparent);
    z-index: 12;
    font-weight: 600;
}

.busy.on {
    display: grid;
}

.spinner {
    width: 26px;
    height: 26px;
    border: 3px solid var(--line);
    border-top-color: var(--accent-2);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ---------- Status bar & toasts ---------- */

.statusbar {
    display: flex;
    align-items: center;
    gap: 18px;
    height: 28px;
    padding: 0 14px;
    background: var(--panel);
    border-top: 1px solid var(--line);
    color: var(--ink-2);
    font-size: 12px;
    white-space: nowrap;
    overflow: hidden;
}

.statusbar b {
    color: var(--ink);
    font-weight: 600;
}

.statusbar .hint {
    margin-left: auto;
    color: var(--ink-3);
    overflow: hidden;
    text-overflow: ellipsis;
}

.toast {
    position: fixed;
    left: 50%;
    top: 64px;
    transform: translate(-50%, -12px);
    max-width: min(560px, calc(100vw - 32px));
    padding: 10px 16px;
    border-radius: 8px;
    background: #1f242b;
    color: #fff;
    box-shadow: 0 10px 30px rgb(0 0 0 / 25%);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s, transform 0.25s;
    z-index: 100;
}

.toast.show {
    opacity: 1;
    transform: translate(-50%, 0);
}

.toast.error {
    background: var(--danger);
}

/* ---------- Mobile ---------- */

.panel-toggle {
    display: none;
}

@media (max-width: 860px) {
    .workspace {
        grid-template-columns: 1fr;
    }

    .panel {
        position: fixed;
        top: 52px;
        bottom: 28px;
        left: 0;
        width: min(360px, 92vw);
        z-index: 30;
        transform: translateX(-102%);
        transition: transform 0.25s ease;
        box-shadow: 8px 0 30px rgb(0 0 0 / 18%);
    }

    body.panel-open .panel {
        transform: none;
    }

    .panel-toggle {
        display: inline-flex;
    }

    .app-tabs a span,
    .home-link,
    .tb-hide-sm {
        display: none;
    }

    .hud-title {
        max-width: 70%;
    }

    .statusbar .hint {
        display: none;
    }
}

[hidden] {
    display: none !important;
}

/* Stacking order inside the viewport: canvas < labels/gizmo < HUD & tools. */
.viewport-canvas { z-index: 0; }
.label-layer, .axes-gizmo { z-index: 2; }
.hud, .modebar { z-index: 6; }
.hover-card { z-index: 7; }
.note a { color: var(--accent); }

/* ==========================================================================
   Panel design: tabs, cards, builder tiles, previews
   ========================================================================== */

:root {
    --panel-bg: #f3f5f8;
    --card-shadow: 0 1px 2px rgb(16 24 40 / 5%), 0 1px 3px rgb(16 24 40 / 6%);
    --card-shadow-open: 0 4px 18px rgb(16 24 40 / 9%);
    --chip-a: #2f7de1;
    --chip-b: #1a5e8a;
    --preview-a: #fbfcfe;
    --preview-b: #e6ebf2;
}

:root[data-theme="dark"] {
    --panel-bg: #15181c;
    --card-shadow: 0 1px 2px rgb(0 0 0 / 30%);
    --card-shadow-open: 0 6px 22px rgb(0 0 0 / 35%);
    --chip-a: #4f9be8;
    --chip-b: #2b6ea8;
    --preview-a: #232931;
    --preview-b: #15191e;
}

.panel {
    background: var(--panel-bg);
}

/* Pill-style tabs */
.tabs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2px;
    margin: 10px 12px 4px;
    padding: 3px;
    background: color-mix(in srgb, var(--line) 70%, transparent);
    border-radius: 9px;
}

.tabs button {
    height: 32px;
    border: 0;
    border-radius: 7px;
    background: none;
    color: var(--ink-2);
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s, box-shadow 0.2s;
}

.tabs button:hover {
    color: var(--ink);
}

.tabs button[aria-selected="true"] {
    background: var(--panel);
    color: var(--ink);
    font-weight: 600;
    box-shadow: 0 1px 3px rgb(0 0 0 / 12%);
}

.tab-body {
    flex: 1;
    overflow-y: auto;
    padding: 8px 12px 28px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    scrollbar-width: thin;
}

/* Cards (builders) and sections (other tabs) share one look */
.card,
.sec {
    flex: none;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.card[open],
.sec[open] {
    box-shadow: var(--card-shadow-open);
}

.card[open] {
    border-color: color-mix(in srgb, var(--accent-2) 45%, var(--line));
}

.card>summary,
.sec>summary {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 14px;
    cursor: pointer;
    list-style: none;
    user-select: none;
    border-radius: 12px;
}

.card>summary::-webkit-details-marker,
.sec>summary::-webkit-details-marker {
    display: none;
}

.card>summary:hover,
.sec>summary:hover {
    background: color-mix(in srgb, var(--panel-2) 70%, transparent);
}

/* Chevron on the right */
.card>summary::after,
.sec>summary::after {
    content: "";
    margin-left: auto;
    width: 7px;
    height: 7px;
    border-right: 1.7px solid var(--ink-3);
    border-bottom: 1.7px solid var(--ink-3);
    transform: rotate(45deg) translate(-2px, -2px);
    transition: transform 0.25s ease;
    flex: none;
}

.card[open]>summary::after,
.sec[open]>summary::after {
    transform: rotate(225deg) translate(-2px, -2px);
}

.sec>summary {
    font-weight: 600;
}

.sec>summary .tag {
    margin-left: auto;
    font-size: 11px;
    font-weight: 500;
    color: var(--ink-3);
}

.sec>summary .tag~* {
    margin-left: 0;
}

.sec>summary:has(.tag)::after {
    margin-left: 4px;
}

.card-ico {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 9px;
    background: linear-gradient(135deg, var(--chip-a), var(--chip-b));
    color: #fff;
    flex: none;
    box-shadow: 0 2px 6px color-mix(in srgb, var(--chip-a) 35%, transparent);
}

.card-ico svg,
.builder-tiles svg {
    width: 19px;
    height: 19px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.card-ico svg .fill,
.builder-tiles svg .fill {
    fill: currentColor;
}

.card-title {
    display: grid;
    line-height: 1.25;
    min-width: 0;
}

.card-title b {
    font-size: 13.5px;
    font-weight: 600;
}

.card-title small {
    color: var(--ink-3);
    font-size: 11.5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-body,
.sec-body {
    display: grid;
    gap: 10px;
    padding: 2px 14px 14px;
}

.card[open] .card-body {
    animation: card-in 0.28s ease both;
}

@keyframes card-in {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

.stack {
    display: grid;
    gap: 10px;
}

.group-title {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-top: 4px;
    font-size: 10.5px;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--ink-3);
}

.group-title span {
    font-weight: 500;
    letter-spacing: 0;
    text-transform: none;
    font-size: 11px;
}

.group-title::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--line);
    align-self: center;
}

/* Units inside inputs */
.field.unit {
    position: relative;
}

.field.unit input {
    padding-right: 30px;
}

.field.unit::after {
    content: attr(data-unit);
    position: absolute;
    right: 9px;
    bottom: 7px;
    font-size: 11px;
    color: var(--ink-3);
    pointer-events: none;
}

.table.two .tr {
    grid-template-columns: 1fr 1.2fr 26px;
}

.btn.small {
    height: 26px;
    padding: 0 9px;
    font-size: 12px;
}

.btn.primary.block {
    margin-top: 4px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--chip-a), var(--chip-b));
    border: 0;
    color: #fff;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--chip-a) 30%, transparent);
    transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.btn.primary.block:hover {
    filter: brightness(1.06);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px color-mix(in srgb, var(--chip-a) 38%, transparent);
}

/* Source crystal bar */
.source-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: none;
    padding: 10px 12px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: var(--card-shadow);
}

.source-bar>div {
    display: grid;
    min-width: 0;
    line-height: 1.3;
}

.source-bar b {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.source-label {
    font-size: 10.5px;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--ink-3);
}

.source-meta {
    font-size: 11.5px;
    color: var(--ink-2);
}

.source-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--ok);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--ok) 18%, transparent);
    flex: none;
}

.source-bar .btn {
    margin-left: auto;
}

/* Builder tiles */
.builder-tiles {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    flex: none;
}

.builder-tiles button {
    display: grid;
    justify-items: center;
    gap: 5px;
    padding: 10px 4px 8px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--panel);
    color: var(--ink-2);
    font-size: 11.5px;
    font-weight: 500;
    line-height: 1.2;
    cursor: pointer;
    transition: transform 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.builder-tiles button:hover {
    transform: translateY(-1px);
    border-color: color-mix(in srgb, var(--accent-2) 45%, var(--line));
    color: var(--ink);
    box-shadow: var(--card-shadow-open);
}

.builder-tiles button[aria-pressed="true"] {
    border-color: var(--accent-2);
    background: color-mix(in srgb, var(--accent-2) 9%, var(--panel));
    color: var(--accent);
}

.builder-tiles svg {
    width: 22px;
    height: 22px;
}

/* Live previews: canvas with a caption strip underneath */
.preview {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    background: radial-gradient(120% 90% at 50% 20%, var(--preview-a), var(--preview-b));
    border: 1px solid var(--line);
}

.preview canvas {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 10;
    cursor: grab;
    touch-action: none;
}

.preview canvas:active {
    cursor: grabbing;
}

.preview-cap {
    padding: 7px 10px;
    border-top: 1px solid var(--line);
    background: color-mix(in srgb, var(--panel) 88%, transparent);
    font-size: 11.5px;
    line-height: 1.4;
    color: var(--ink);
}

.preview-cap:empty {
    display: none;
}

.preview-cap span {
    color: var(--ink-2);
}

.preview-cap .bad,
.preview-cap.warn {
    color: var(--danger);
}

.preview-hint {
    position: absolute;
    top: 7px;
    right: 9px;
    font-size: 10.5px;
    color: var(--ink-3);
    pointer-events: none;
}

/* Preview view-mode chips (e.g. Wulff shape / atoms) and facet legend */
.preview-modes {
    position: absolute;
    top: 7px;
    left: 8px;
    display: flex;
    gap: 2px;
    padding: 2px;
    border-radius: 7px;
    background: color-mix(in srgb, var(--panel) 80%, transparent);
    backdrop-filter: blur(6px);
    border: 1px solid var(--line);
}

.preview-modes button {
    height: 22px;
    padding: 0 8px;
    border: 0;
    border-radius: 5px;
    background: none;
    color: var(--ink-2);
    font-size: 11px;
    cursor: pointer;
}

.preview-modes button[aria-pressed="true"] {
    background: var(--panel);
    color: var(--ink);
    font-weight: 600;
    box-shadow: 0 1px 2px rgb(0 0 0 / 12%);
}

.facet-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 12px;
    margin-top: 4px;
}

.facet-legend i {
    display: inline-block;
    width: 10px;
    height: 10px;
    margin-right: 5px;
    border-radius: 2px;
    vertical-align: -1px;
}

.facet-legend .off {
    color: var(--ink-3);
}

/* Builders are picked with the tiles: only the chosen card is shown and its
   header is a static title. */
details.card:not([open]) {
    display: none;
}

.card>summary {
    cursor: default;
}

.card>summary:hover {
    background: none;
}

.card>summary::after {
    display: none;
}

/* Page heading for crawlers and screen readers; the tools show no visible title. */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}