:root {
    --page-bg: #f3f6fb;
    --surface: rgba(255, 255, 255, 0.88);
    --surface-muted: rgba(248, 251, 255, 0.78);
    --surface-strong: #edf3fb;
    --border: rgba(133, 150, 174, 0.28);
    --border-strong: rgba(88, 113, 145, 0.44);
    --text: #101724;
    --muted: #526174;
    --subtle: #788699;
    --accent: #2468ff;
    --accent-strong: #1647c8;
    --accent-soft: rgba(36, 104, 255, 0.1);
    --tech: #00a6a6;
    --tech-soft: rgba(0, 166, 166, 0.12);
    --signal: #ff5f3d;
    --success: #087f70;
    --warning: #a86100;
    --danger: #c42f3a;
    --shadow: 0 20px 54px rgba(26, 39, 63, 0.12);
    --shadow-soft: 0 8px 24px rgba(26, 39, 63, 0.08);
    --focus: 0 0 0 3px rgba(36, 104, 255, 0.22);
    --radius: 8px;
    --checker-base: #c8d3e2;
    --checker-mark: #ffffff;
}

* {
    box-sizing: border-box;
}

html {
    min-width: 320px;
}

body {
    position: relative;
    margin: 0;
    color: var(--text);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.82) 0%, rgba(243, 246, 251, 0.96) 38%),
        linear-gradient(135deg, rgba(36, 104, 255, 0.12), transparent 36%),
        linear-gradient(315deg, rgba(0, 166, 166, 0.1), transparent 34%), var(--page-bg);
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        'Segoe UI',
        Arial,
        sans-serif;
    line-height: 1.4;
}

body::before {
    position: fixed;
    z-index: -1;
    inset: 0;
    background-image:
        linear-gradient(rgba(36, 104, 255, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 166, 166, 0.05) 1px, transparent 1px);
    background-size: 38px 38px;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.58), transparent 78%);
    content: '';
    pointer-events: none;
}

body.landing-page {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.82) 0%, rgba(243, 246, 251, 0.92) 42%),
        linear-gradient(135deg, rgba(255, 95, 61, 0.12), transparent 32%),
        linear-gradient(315deg, rgba(0, 166, 166, 0.12), transparent 38%), var(--page-bg);
}

button,
input,
select {
    font: inherit;
}

button {
    border: 0;
}

a {
    color: inherit;
}

p,
h1,
h2,
h3,
figure {
    margin: 0;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    min-height: 64px;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px clamp(16px, 4vw, 40px);
    border-bottom: 1px solid rgba(133, 150, 174, 0.22);
    background: rgba(247, 250, 255, 0.76);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.72) inset;
    backdrop-filter: blur(18px) saturate(1.18);
}

.brand-link {
    display: inline-flex;
    min-width: 0;
    flex-direction: column;
    color: var(--text);
    font-weight: 750;
    letter-spacing: 0;
    text-decoration: none;
}

.brand-link::before {
    display: inline-block;
    width: 34px;
    height: 3px;
    margin-bottom: 7px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent), var(--tech));
    content: '';
}

.brand-link span {
    color: var(--muted);
    font-size: 12px;
    font-weight: 650;
}

.demo-nav {
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 6px;
}

.demo-nav a {
    display: inline-flex;
    min-height: 34px;
    align-items: center;
    justify-content: center;
    padding: 7px 11px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
    line-height: 1.1;
    text-decoration: none;
    transition:
        border-color 0.16s ease,
        background-color 0.16s ease,
        color 0.16s ease,
        box-shadow 0.16s ease;
}

.demo-nav a:hover {
    border-color: var(--border);
    background: rgba(255, 255, 255, 0.82);
    color: var(--text);
    box-shadow: var(--shadow-soft);
}

.demo-nav a[aria-current='page'] {
    border-color: rgba(36, 104, 255, 0.32);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.62), rgba(36, 104, 255, 0.12)),
        var(--accent-soft);
    color: var(--accent-strong);
    box-shadow: 0 0 0 1px rgba(36, 104, 255, 0.08) inset;
}

.page-shell {
    width: min(1680px, calc(100vw - 32px));
    margin: 0 auto;
    padding: 18px 0 28px;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 18px;
    align-items: end;
    position: relative;
    padding: 16px 0 22px;
}

.hero h1 {
    max-width: 780px;
    font-size: 54px;
    font-weight: 760;
    line-height: 1.02;
    letter-spacing: 0;
}

.hero h1::after {
    display: block;
    width: min(180px, 42vw);
    height: 4px;
    margin-top: 14px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent), var(--tech), transparent);
    content: '';
}

.hero p {
    max-width: 780px;
    margin-top: 10px;
    color: var(--muted);
    font-size: 16px;
}

body:not(.landing-page) .page-shell {
    padding-top: 12px;
}

body:not(.landing-page) .hero {
    padding: 10px 0 18px;
}

body:not(.landing-page) .hero h1 {
    font-size: 46px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.workspace {
    display: grid;
    grid-template-columns: minmax(250px, 300px) minmax(0, 1fr) minmax(250px, 310px);
    gap: 12px;
    align-items: start;
}

.panel {
    position: relative;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px) saturate(1.08);
}

.panel::before {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.92) inset,
        0 -1px 0 rgba(16, 23, 36, 0.04) inset;
    content: '';
    pointer-events: none;
}

.control-panel,
.details-panel {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 10px;
}

.status-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.status-card-grid .status-row {
    min-height: 46px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 3px;
}

.status-card-grid .status-row span:last-child {
    max-width: 100%;
    text-align: left;
    overflow-wrap: anywhere;
}

.editor-panel {
    min-width: 0;
    overflow: hidden;
}

.panel-section {
    position: relative;
    display: grid;
    gap: 9px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.74), rgba(248, 251, 255, 0.72)),
        var(--surface-muted);
}

.panel-section h2,
.panel-section h3 {
    color: var(--text);
    font-size: 13px;
    font-weight: 780;
    letter-spacing: 0;
}

.panel-section h2::before,
.panel-section h3::before {
    display: inline-block;
    width: 7px;
    height: 7px;
    margin-right: 8px;
    border-radius: 50%;
    background: var(--tech);
    box-shadow: 0 0 0 4px var(--tech-soft);
    content: '';
    vertical-align: 1px;
}

.panel-section p,
.note {
    color: var(--muted);
    font-size: 13px;
}

.note strong {
    color: var(--text);
}

.control-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.control-grid.three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.field {
    display: grid;
    gap: 5px;
}

.field span,
.field label {
    color: var(--muted);
    font-size: 12px;
    font-weight: 730;
}

.field input,
.field select {
    width: 100%;
    min-width: 0;
    min-height: 36px;
    border: 1px solid var(--border);
    border-radius: 7px;
    background: rgba(255, 255, 255, 0.82);
    color: var(--text);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.78) inset;
}

.field input[type='color'] {
    min-height: 36px;
    padding: 3px;
}

.field input[type='checkbox'] {
    width: 18px;
    height: 18px;
    min-height: 18px;
    flex: 0 0 18px;
    padding: 0;
    box-shadow: none;
    accent-color: var(--accent);
}

.field input[type='range'] {
    accent-color: var(--accent);
}

.check-field {
    display: flex;
    min-height: 38px;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 7px;
    background: rgba(255, 255, 255, 0.72);
}

.check-field span {
    min-width: 0;
}

.check-field input[type='checkbox'] {
    margin: 0;
}

.file-input {
    width: 100%;
    min-width: 0;
    color: var(--muted);
    font-size: 13px;
}

.file-input::file-selector-button {
    min-height: 32px;
    margin-right: 8px;
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 7px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(246, 249, 253, 0.9)), var(--surface);
    color: var(--text);
    font: inherit;
    font-weight: 760;
    cursor: pointer;
}

.file-input::file-selector-button:hover {
    border-color: var(--border-strong);
}

.button {
    display: inline-flex;
    min-width: 0;
    min-height: 36px;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(246, 249, 253, 0.9)), var(--surface);
    color: var(--text);
    font-size: 13px;
    font-weight: 760;
    line-height: 1.1;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset;
    transition:
        transform 0.16s ease,
        border-color 0.16s ease,
        background-color 0.16s ease,
        box-shadow 0.16s ease;
}

.button:hover {
    border-color: var(--border-strong);
    background: var(--surface-strong);
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.9) inset,
        0 10px 20px rgba(26, 39, 63, 0.08);
    transform: translateY(-1px);
}

.button.primary {
    border-color: rgba(36, 104, 255, 0.78);
    background:
        linear-gradient(135deg, rgba(36, 104, 255, 1), rgba(0, 166, 166, 0.92)), var(--accent);
    color: #ffffff;
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.22) inset,
        0 12px 24px rgba(36, 104, 255, 0.22);
}

.button.primary:hover {
    border-color: rgba(22, 71, 200, 0.8);
    background: linear-gradient(135deg, var(--accent-strong), #008f94), var(--accent-strong);
}

.button.danger {
    border-color: #fecaca;
    background: #fff1f2;
    color: var(--danger);
}

.button.success {
    border-color: #99f6e4;
    background: #ecfdf5;
    color: var(--success);
}

.button:disabled,
.field input:disabled,
.field select:disabled {
    cursor: not-allowed;
    opacity: 0.52;
    transform: none;
}

.button:focus-visible,
.field input:focus-visible,
.field select:focus-visible,
.demo-nav a:focus-visible,
.brand-link:focus-visible {
    outline: 0;
    box-shadow: var(--focus);
}

.canvas-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 10px;
    border-bottom: 1px solid var(--border);
    background:
        linear-gradient(90deg, rgba(36, 104, 255, 0.08), rgba(0, 166, 166, 0.06)),
        rgba(255, 255, 255, 0.76);
}

.canvas-title {
    display: grid;
    gap: 2px;
    min-width: 0;
}

.canvas-title strong {
    font-size: 14px;
    letter-spacing: 0;
}

.canvas-title span {
    color: var(--muted);
    font-size: 12px;
}

.scale-readout {
    display: inline-flex;
    min-height: 38px;
    align-items: center;
    gap: 2px;
    padding: 0 9px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.84);
    color: var(--muted);
    font-size: 13px;
    font-weight: 760;
}

.scale-readout input {
    width: 44px;
    border: 0;
    background: transparent;
    color: var(--text);
    text-align: right;
    pointer-events: none;
}

.canvas-shell {
    position: relative;
    min-height: clamp(500px, calc(100vh - 210px), 780px);
    border-top: 1px solid rgba(255, 255, 255, 0.58);
    background: var(--checker-base);
    background-image:
        linear-gradient(45deg, var(--checker-mark) 25%, transparent 0),
        linear-gradient(45deg, transparent 75%, var(--checker-mark) 0),
        linear-gradient(45deg, var(--checker-mark) 25%, transparent 0),
        linear-gradient(45deg, transparent 75%, var(--checker-mark) 0);
    background-position:
        0 0,
        8px 8px,
        8px 8px,
        16px 16px;
    background-size: 16px 16px;
}

.empty-state,
.canvas-viewport {
    width: 100%;
    height: clamp(500px, calc(100vh - 210px), 780px);
}

.empty-state {
    display: grid;
    place-items: center;
    padding: 26px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(244, 248, 253, 0.9)), var(--surface);
    text-align: center;
}

.empty-state[hidden],
.canvas-viewport[hidden] {
    display: none;
}

.empty-card {
    display: grid;
    max-width: 420px;
    gap: 10px;
    justify-items: center;
}

.empty-card .empty-mark {
    display: grid;
    width: 56px;
    height: 56px;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background:
        linear-gradient(135deg, rgba(36, 104, 255, 0.12), rgba(0, 166, 166, 0.12)),
        var(--surface-muted);
    color: var(--accent);
    font-weight: 820;
    box-shadow: 0 12px 26px rgba(26, 39, 63, 0.08);
}

.empty-card h2 {
    font-size: 18px;
    font-weight: 780;
}

.empty-card p {
    color: var(--muted);
    font-size: 14px;
}

.canvas-viewport {
    overflow: auto;
}

canvas {
    display: block;
}

.message {
    min-height: 20px;
    color: var(--muted);
    font-size: 13px;
    overflow-wrap: anywhere;
}

.message[data-tone='success'] {
    color: var(--success);
}

.message[data-tone='error'] {
    color: var(--danger);
}

.status-grid {
    display: grid;
    gap: 7px;
}

.status-row {
    display: flex;
    min-height: 30px;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 6px 8px;
    border: 1px solid var(--border);
    border-radius: 7px;
    background: rgba(255, 255, 255, 0.72);
    font-size: 13px;
}

.status-row span:first-child {
    color: var(--muted);
    font-weight: 700;
}

.status-row span:last-child {
    color: var(--text);
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, ui-monospace, monospace;
    font-size: 12px;
    font-weight: 760;
    text-align: right;
}

.list {
    display: grid;
    max-height: 220px;
    margin: 0;
    padding: 0;
    overflow: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.68);
    list-style: none;
}

.list:empty::before {
    padding: 12px;
    color: var(--muted);
    content: attr(data-empty);
    font-size: 13px;
}

.list-group-item,
.mask-item,
.annotation-item {
    min-height: 36px;
    padding: 8px 10px;
    border: 0;
    border-bottom: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.72);
    color: var(--text);
    font-size: 13px;
    cursor: pointer;
}

.list-group-item:last-child,
.mask-item:last-child,
.annotation-item:last-child {
    border-bottom: 0;
}

.list-group-item:hover,
.mask-item:hover,
.annotation-item:hover {
    background: linear-gradient(90deg, var(--accent-soft), var(--tech-soft));
}

.list-group-item.active,
.mask-item.active,
.annotation-item.active {
    background: linear-gradient(135deg, var(--accent), var(--tech));
    color: #ffffff;
}

.export-preview {
    display: grid;
    gap: 8px;
}

.export-preview img {
    display: block;
    width: 100%;
    max-height: 180px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.64);
    object-fit: contain;
}

.export-preview img:not([src]),
.export-preview img[src=''] {
    display: none;
}

.api-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.api-list code {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 4px 7px;
    border: 1px solid rgba(36, 104, 255, 0.18);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.78);
    color: #34506d;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, ui-monospace, monospace;
    font-size: 12px;
    font-weight: 650;
}

.landing-shell {
    width: min(1500px, calc(100vw - 32px));
    padding-top: 8px;
}

.landing-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    align-items: start;
    padding: 10px 0 8px;
    overflow: hidden;
}

.landing-copy {
    display: grid;
    max-width: 900px;
    gap: 7px;
}

.landing-actions {
    margin-top: 3px;
}

.landing-actions .button {
    min-height: 40px;
}

.landing-highlights {
    display: flex;
    max-width: 920px;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 2px;
}

.landing-highlights span {
    display: inline-flex;
    min-height: 28px;
    align-items: center;
    padding: 5px 9px;
    border: 1px solid rgba(36, 104, 255, 0.16);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.76);
    color: #34506d;
    font-size: 12px;
    font-weight: 740;
}

.eyebrow {
    display: inline-flex;
    width: fit-content;
    min-height: 28px;
    align-items: center;
    padding: 5px 9px;
    border: 1px solid rgba(255, 95, 61, 0.22);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.76);
    color: #9d341f;
    font-size: 12px;
    font-weight: 780;
}

.landing-hero h1 {
    max-width: 900px;
    font-size: 42px;
}

.landing-hero h1::after {
    height: 3px;
    margin-top: 9px;
    background: linear-gradient(90deg, var(--signal), var(--accent), var(--tech), transparent);
}

.landing-showcase {
    position: relative;
    display: grid;
    height: 340px;
    grid-template-rows: 38px minmax(0, 1fr);
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: linear-gradient(135deg, rgba(12, 20, 34, 0.96), rgba(22, 71, 200, 0.74)), #101724;
    box-shadow: 0 24px 70px rgba(26, 39, 63, 0.2);
}

.landing-showcase::before {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
    background-size: 32px 32px;
    content: '';
    opacity: 0.62;
    pointer-events: none;
}

.showcase-toolbar,
.showcase-body {
    position: relative;
    z-index: 1;
}

.showcase-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.08);
}

.showcase-title {
    color: #ffffff;
    font-size: 13px;
    font-weight: 780;
}

.showcase-meter {
    width: 160px;
    max-width: 38%;
    height: 8px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--signal), var(--tech), rgba(255, 255, 255, 0.38));
}

.showcase-body {
    display: grid;
    min-height: 0;
    grid-template-columns: 160px minmax(0, 1fr) 180px;
    gap: 8px;
    overflow: hidden;
    padding: 8px;
}

.showcase-controls,
.showcase-inspector {
    display: grid;
    align-content: start;
    gap: 6px;
    padding: 8px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.1);
}

.showcase-controls span,
.showcase-inspector span {
    display: block;
    height: 22px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 7px;
    background: rgba(255, 255, 255, 0.15);
}

.showcase-controls span:first-child,
.showcase-inspector span:first-child {
    background: linear-gradient(90deg, rgba(36, 104, 255, 0.92), rgba(0, 166, 166, 0.78));
}

.showcase-controls span:nth-child(3) {
    width: 72%;
}

.showcase-controls span:nth-child(4) {
    width: 88%;
}

.showcase-inspector span:nth-child(2) {
    width: 76%;
}

.showcase-inspector span:nth-child(3) {
    width: 92%;
}

.showcase-canvas {
    display: grid;
    min-width: 0;
    margin-bottom: 10px;
    place-items: center;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius);
    background-color: #c8d3e2;
    background-image:
        linear-gradient(45deg, rgba(255, 255, 255, 0.92) 25%, transparent 0),
        linear-gradient(45deg, transparent 75%, rgba(255, 255, 255, 0.92) 0),
        linear-gradient(45deg, rgba(255, 255, 255, 0.92) 25%, transparent 0),
        linear-gradient(45deg, transparent 75%, rgba(255, 255, 255, 0.92) 0);
    background-position:
        0 0,
        8px 8px,
        8px 8px,
        16px 16px;
    background-size: 16px 16px;
}

.studio-canvas-viewport {
    position: relative;
    display: grid;
    width: 100%;
    height: 100%;
    min-height: 96px;
    place-items: center;
    overflow: hidden;
    border-radius: 6px;
}

.studio-canvas-viewport .canvas-container {
    box-shadow: 0 14px 34px rgba(16, 23, 36, 0.24);
}

.studio-canvas-viewport canvas {
    display: block;
}

.landing-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 6px;
}

.demo-card {
    position: relative;
    display: grid;
    min-height: 210px;
    align-content: space-between;
    gap: 18px;
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(247, 250, 255, 0.76)),
        var(--surface);
    box-shadow: var(--shadow);
    text-decoration: none;
    overflow: hidden;
    transition:
        transform 0.16s ease,
        border-color 0.16s ease,
        box-shadow 0.16s ease;
}

.demo-card::before {
    display: block;
    width: 62px;
    height: 4px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent), var(--tech));
    content: '';
}

.demo-card::after {
    position: absolute;
    top: 18px;
    right: 18px;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(36, 104, 255, 0.14);
    border-radius: var(--radius);
    background:
        linear-gradient(135deg, rgba(36, 104, 255, 0.18), rgba(0, 166, 166, 0.14)),
        rgba(255, 255, 255, 0.72);
    clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
    content: '';
}

.demo-card:hover {
    border-color: var(--border-strong);
    box-shadow: 0 22px 58px rgba(26, 39, 63, 0.16);
    transform: translateY(-2px);
}

.demo-card h2 {
    font-size: 22px;
    font-weight: 780;
}

.demo-card p {
    margin-top: 8px;
    color: var(--muted);
}

.demo-card ul {
    display: grid;
    gap: 5px;
    margin: 12px 0 0;
    padding-left: 18px;
    color: var(--muted);
    font-size: 14px;
}

.demo-card .button {
    width: fit-content;
}

.landing-note {
    margin-top: 12px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.78);
    color: var(--muted);
    font-size: 14px;
    box-shadow: var(--shadow-soft);
}

.legacy-note {
    margin-top: 8px;
    margin-left: 10px;
    color: var(--muted);
    font-size: 13px;
}

.legacy-note a {
    color: var(--accent-strong);
    font-weight: 760;
    text-decoration: none;
}

.legacy-note a:hover {
    text-decoration: underline;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    clip-path: inset(50%);
    border: 0;
    white-space: nowrap;
}

@media (max-width: 1180px) {
    .workspace {
        grid-template-columns: minmax(220px, 290px) minmax(0, 1fr);
    }

    .details-panel {
        grid-column: 1 / -1;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .showcase-body {
        grid-template-columns: 132px minmax(0, 1fr) 148px;
    }

    .landing-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 860px) {
    .site-header,
    .hero {
        align-items: stretch;
        grid-template-columns: 1fr;
    }

    .site-header {
        position: static;
        flex-direction: column;
    }

    .demo-nav {
        justify-content: flex-start;
    }

    .workspace,
    .details-panel,
    .landing-grid {
        grid-template-columns: 1fr;
    }

    .landing-showcase {
        height: 286px;
    }

    .showcase-body {
        grid-template-columns: 112px minmax(0, 1fr);
    }

    .showcase-inspector {
        display: none;
    }

    .control-panel {
        order: 2;
    }

    .editor-panel {
        order: 1;
    }

    .details-panel {
        order: 3;
    }
}

@media (max-width: 580px) {
    .page-shell {
        width: calc(100vw - 20px);
        padding-top: 12px;
    }

    .hero h1 {
        font-size: 32px;
    }

    .landing-showcase {
        height: clamp(176px, 42vw, 246px);
        grid-template-rows: 44px minmax(0, 1fr);
    }

    .landing-actions .button {
        flex: 1 1 190px;
    }

    .showcase-body {
        grid-template-columns: minmax(0, 1fr);
    }

    .showcase-controls {
        display: none;
    }

    .showcase-meter {
        display: none;
    }

    .control-grid,
    .control-grid.three {
        grid-template-columns: 1fr;
    }

    .canvas-toolbar {
        align-items: stretch;
        flex-direction: column;
    }

    .empty-state,
    .canvas-viewport,
    .canvas-shell {
        min-height: 420px;
        height: 420px;
    }
}