/* ─── Splash Screen ─── */
.splash-screen {
    position: fixed;
    inset: 0;
    background: #06060f;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999999;
    transition: opacity 0.45s ease, visibility 0.45s ease;
    font-family: var(--font-ui);
}
.splash-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.splash-card {
    width: min(920px, 88vw);
    height: min(400px, 58vh);
    background: #0a0a14;
    border-radius: 14px;
    overflow: hidden;
    display: grid;
    grid-template-columns: 0.75fr 1.8fr 0.9fr;
    box-shadow: 0 0 0 1px rgba(100,80,255,0.25), 0 24px 60px rgba(0,0,0,0.7), 0 0 80px rgba(80,0,180,0.18);
    border: 1px solid rgba(100,80,255,0.22);
}
.splash-logo-panel {
    background: #06060f;
    color: #ffffff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 32px 26px;
    border-right: 1px solid rgba(100,80,255,0.18);
    gap: 8px;
}
.splash-logo {
    width: 90px;
    height: auto;
    margin-bottom: 12px;
    opacity: 0.9;
}
.splash-brand-big {
    font-size: 22px;
    font-weight: 900;
    letter-spacing: 4px;
    line-height: 1.05;
    background: linear-gradient(135deg, #fff 30%, #aa88ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.splash-subtitle {
    font-size: 8px;
    letter-spacing: 3px;
    opacity: 0.45;
    color: #00f5ff;
    -webkit-text-fill-color: #00f5ff;
    text-transform: uppercase;
}
.splash-media {
    background: #060612;
    display: flex;
    align-items: stretch;
    position: relative;
    overflow: hidden;
}
.splash-media canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}
.splash-info {
    background: #0a0a14;
    padding: 26px 22px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    justify-content: center;
    border-left: 1px solid rgba(100,80,255,0.15);
}
.splash-tag {
    font-size: 8px;
    letter-spacing: 3px;
    color: #00f5ff;
    text-transform: uppercase;
    opacity: 0.85;
}
.splash-version {
    font-size: 10px;
    letter-spacing: 1px;
    opacity: 0.4;
    color: #ffffff;
    margin-top: -4px;
}
.splash-section { margin-top: 4px; }
.splash-label {
    font-size: 8px;
    letter-spacing: 2px;
    text-transform: uppercase;
    opacity: 0.4;
    color: #ffffff;
    margin-bottom: 3px;
}
.splash-text { font-size: 11px; line-height: 1.4; color: #e0d8ff; }
.splash-footer { margin-top: auto; font-size: 9px; opacity: 0.35; color: #ffffff; letter-spacing: 1px; }
@media (max-width: 1000px) {
    .splash-card {
        grid-template-columns: 1fr;
        width: min(340px, 92vw);
        height: auto;
    }
    .splash-logo-panel {
        border-right: none;
        border-bottom: 1px solid rgba(100,80,255,0.18);
        padding: 20px 18px;
        align-items: center;
    }
    .splash-logo { width: 42px; margin-bottom: 4px; }
    .splash-brand-big { font-size: 18px; letter-spacing: 3px; text-align: center; }
    .splash-media { height: clamp(150px, 28vh, 220px); }
    .splash-info { border-left: none; border-top: 1px solid rgba(100,80,255,0.15); }
}

:root {
    --paper: #f8f8f8;
    --paper-strong: #ffffff;
    --canvas: #ededed;
    --ink: #111111;
    --ink-soft: rgba(17, 17, 17, 0.58);
    --panel: #ffffff;
    --panel-strong: #ffffff;
    --line: #e0e0e0;
    --line-strong: #cfcfcf;
    --accent: #111111;
    --accent-soft: rgba(17, 17, 17, 0.06);
    --warn: #111111;
    --shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
    --font-ui: "IBM Plex Mono", monospace;
    --font-display: "Inter", "Segoe UI", sans-serif;
    --font-mono: "IBM Plex Mono", monospace;
    --mob-nav-base-h: 64px;
    --mob-safe-bottom: env(safe-area-inset-bottom, 0px);
    --mob-nav-h: calc(var(--mob-nav-base-h) + var(--mob-safe-bottom));
}

* {
    box-sizing: border-box;
}

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

body {
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-ui);
    overflow: hidden;
    font-size: 11px;
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

body::before,
body::after {
    display: none;
}

button,
input,
select {
    font: inherit;
}

input,
textarea,
[contenteditable] {
    -webkit-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

button {
    cursor: pointer;
}

.app-shell {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-rows: auto 1fr;
    min-height: 100vh;
    padding: 0;
    gap: 0;
}

.topbar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: center;
    gap: 12px;
    min-height: 54px;
    padding: 6px 10px;
    border-bottom: 1px solid var(--line);
    background: var(--paper-strong);
}

.brand-block,
.chip-row,
.topbar-actions,
.button-row,
.metric-row,
.legend-row,
.brush-mode-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-logo {
    width: 37px;
    height: 37px;
    flex: 0 0 37px;
    object-fit: contain;
}
.brand-logo--light { display: block; }
.brand-logo--dark  { display: none; }
[data-theme="dark"] .brand-logo--light  { display: none; }
[data-theme="dark"] .brand-logo--dark   { display: block; }
[data-theme="neon"] .brand-logo--light  { display: none; }
[data-theme="neon"] .brand-logo--dark   { display: block; }

.brand-copy {
    display: grid;
    gap: 1px;
}

.brand-block h1,
.panel-head h2,
.stage-overlay h2 {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.03em;
}

.brand-block h1 {
    font-size: 15px;
    letter-spacing: 0.08em;
}

.eyebrow {
    margin: 0;
    color: var(--ink-soft);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 8px;
    font-weight: 700;
}

.topbar-center {
    display: grid;
    gap: 6px;
}

.topbar-center--single {
    justify-items: center;
}

.chip-row--tight {
    gap: 6px;
}

.topbar-separator {
    width: 1px;
    height: 18px;
    background: var(--line);
}

.chip,
.action-button,
.primitive-card,
.select-input,
.color-input {
    border: 1px solid var(--line);
    background: var(--panel);
    color: var(--ink);
}

.chip,
.action-button {
    padding: 6px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1;
    transition: background 140ms ease, border-color 140ms ease, color 140ms ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.chip-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    pointer-events: none;
}

.chip:hover,
.action-button:hover,
.primitive-card:hover {
    transform: none;
    background: #f2f2f2;
    border-color: var(--line-strong);
}

.action-button--accent:hover {
    background: #111111;
    color: #ffffff;
    border-color: #111111;
    filter: brightness(1.08);
}

.chip.is-active,
.primitive-card.is-active,
.action-button--accent {
    background: #111111;
    color: #ffffff;
    border-color: #111111;
    box-shadow: none;
}

.chip.thin {
    padding: 5px;
}

.compact-row {
    justify-content: flex-start;
}

.workspace-grid {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 0;
    min-height: 0;
    height: calc(100vh - 55px);
}

.tool-panel {
    display: flex;
    background: var(--panel);
    overflow: hidden;
    min-width: 0;
    transition: width 0.3s ease;
}

.tool-panel--left {
    width: 290px;
    border-right: 1px solid var(--line);
}

.tool-panel--left.is-collapsed {
    width: 56px;
}

.tool-panel--right {
    width: 300px;
    flex-direction: row-reverse;
    border-left: 1px solid var(--line);
}

.tool-panel--right.is-collapsed {
    width: 56px;
}

.sidebar-rail {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 8px 6px;
    width: 56px;
    min-width: 56px;
    border-right: 1px solid var(--line);
    background: #fafafa;
}

.sidebar-rail--right {
    border-right: 0;
    border-left: 1px solid var(--line);
}

.sidebar-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 12px;
    overflow-y: auto;
    overflow-x: hidden;
    min-width: 0;
}

.tool-panel.is-collapsed .sidebar-content {
    display: none !important;
}

.sidebar-section {
    display: none;
    gap: 10px;
}

.sidebar-section.is-active {
    display: grid;
}

.asset-category-label {
    margin: 8px 0 2px;
}

.asset-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4px;
}

.asset-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 10px 6px;
    border: 1px solid var(--line);
    background: var(--panel);
    border-radius: 4px;
    cursor: pointer;
    transition: background 140ms ease, border-color 140ms ease;
}

.asset-card:hover {
    background: #f2f2f2;
    border-color: var(--line-strong);
}

.asset-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    color: var(--ink);
}

.asset-card__name {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--ink);
}

.sidebar-toggle,
.rail-button {
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-transform: uppercase;
    transition: background 140ms ease, border-color 140ms ease, color 140ms ease, transform 160ms ease;
}

.sidebar-toggle:hover,
.rail-button:hover {
    background: #f2f2f2;
    transform: translateY(-1px);
}

.rail-button.is-active {
    background: #111;
    color: #fff;
    border-color: #111;
}

.sidebar-toggle--inline {
    width: 28px;
    height: 28px;
}

.rail-icon,
.sidebar-toggle-icon {
    width: 18px;
    height: 18px;
    display: block;
}

.panel-head--compact h2 {
    font-size: 15px;
}

.panel-head h2,
.stage-overlay h2 {
    font-size: 16px;
}

.logo-strip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: #0c0c0f;
    color: #fff;
}

.logo-strip--light {
    background: #fff;
    color: var(--ink);
    border: 1px solid var(--line);
}

.logo-strip__title,
.logo-strip__meta {
    text-transform: uppercase;
    letter-spacing: 0.14em;
}

.logo-strip__title {
    font-weight: 700;
}

.logo-strip__meta {
    font-size: 9px;
    opacity: 0.74;
}

.stack-block {
    display: grid;
    gap: 10px;
    padding: 10px;
    border: 1px solid var(--line);
    background: var(--paper-strong);
    border-radius: 0;
}

.primitive-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px;
}

.primitive-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 10px 6px;
    border-radius: 6px;
    text-align: center;
    cursor: grab;
    transition: background 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.primitive-card:active {
    cursor: grabbing;
    transform: scale(0.95);
}

.prim-icon {
    width: 36px;
    height: 36px;
    opacity: 0.8;
    pointer-events: none;
}

.primitive-card.is-active .prim-icon,
.primitive-card:hover .prim-icon {
    opacity: 1;
}

.primitive-card span {
    font-weight: 700;
    font-size: 10px;
    letter-spacing: 0.04em;
}

#viewport.drag-over-hint {
    outline: 2px dashed var(--accent);
    outline-offset: -4px;
}

/* ===== Drop Overlay ===== */
.drop-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(17, 17, 17, 0.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    animation: dropFadeIn 0.18s ease-out;
    pointer-events: none;
}

.drop-overlay[hidden] {
    display: none !important;
}

@keyframes dropFadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.drop-overlay__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    padding: 48px 64px;
    border: 2.5px dashed rgba(255, 255, 255, 0.45);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.07);
    animation: dropPulse 1.4s ease-in-out infinite alternate;
}

@keyframes dropPulse {
    from { border-color: rgba(255, 255, 255, 0.3); transform: scale(1); }
    to   { border-color: rgba(255, 255, 255, 0.7); transform: scale(1.015); }
}

.drop-overlay__icon {
    color: #fff;
    opacity: 0.85;
}

.drop-overlay__title {
    margin: 0;
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.02em;
}

.drop-overlay__formats {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 11px;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 0.06em;
}

.primitive-card small,
.metric-row span,
.hint-block p,
.stage-overlay p {
    color: var(--ink-soft);
}

.viewport-stage {
    position: relative;
    min-height: 0;
    border-left: 1px solid var(--line);
    border-right: 1px solid var(--line);
    overflow: hidden;
    background: var(--canvas);
}

#viewport {
    width: 100%;
    height: 100%;
    background: var(--canvas);
    position: relative;
    overflow: hidden;
}

/* Canvas: absolute so it never pushes layout, always covers full viewport */
#viewport canvas {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* ===== Quad-view layout ===== */
.quad-cell { display: none; }

#viewport.quad-active {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
}

#viewport.quad-active .quad-cell {
    display: block;
    min-height: 0;
    min-width: 0;
    pointer-events: none;
}

/* ===== Quad-view overlay ===== */
.quad-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 6;
}
.quad-overlay::before {
    content: '';
    position: absolute;
    left: 50%; top: 0; bottom: 0;
    width: 1px;
    background: rgba(128,128,128,0.35);
    transform: translateX(-50%);
}
.quad-overlay::after {
    content: '';
    position: absolute;
    top: 50%; left: 0; right: 0;
    height: 1px;
    background: rgba(128,128,128,0.35);
    transform: translateY(-50%);
}
.quad-label {
    position: absolute;
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--ink-soft);
    padding: 5px 8px;
    user-select: none;
}
.quad-label--tl { bottom: calc(50% + 6px); right: calc(50% + 8px); }
.quad-label--tr { bottom: calc(50% + 6px); left: calc(50% + 8px); }
.quad-label--bl { top: calc(50% + 6px); right: calc(50% + 8px); }
.quad-label--br { top: calc(50% + 6px); left: calc(50% + 8px); }


.stage-overlay {
    position: absolute;
    left: 12px;
    right: 12px;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 10px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.88);
    border-radius: 0;
}

.stage-overlay--top {
    top: 12px;
}

.stage-overlay--bottom {
    bottom: 8px;
    left: 12px;
    right: 12px;
    padding: 0;
    border: none;
    background: none;
    pointer-events: none;
}

.stage-overlay--bottom #statusText,
.stage-overlay--bottom #statsText {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.06em;
    color: var(--ink-soft);
    padding: 0;
    margin: 0;
    background: none;
    border: none;
    line-height: 1;
    pointer-events: none;
}

.legend-pill,
.mono-data {
    font-family: var(--font-mono);
    font-size: 10px;
}

.legend-pill {
    padding: 4px 6px;
    border-radius: 4px;
    border: 1px solid var(--line);
    background: #fff;
}

.legend-pill--button {
    cursor: pointer;
    color: var(--ink);
}

.legend-pill--button:hover {
    background: #f2f2f2;
}

.field-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

input[type="range"] {
    width: 100%;
    accent-color: #111111;
}

.metric-row {
    justify-content: space-between;
    font-size: 11px;
}

.metric-row strong {
    color: var(--ink);
}

.info-card {
    background: #ffffff;
}

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

.button-row--triple {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.color-input,
.select-input,
.text-input {
    width: 100%;
    min-height: 38px;
    border-radius: 4px;
    padding: 8px 10px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
}

.color-input {
    padding: 4px;
}

.text-input::placeholder {
    color: rgba(17, 17, 17, 0.42);
}

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

.vector-field {
    display: grid;
    gap: 4px;
}

.vector-field__label {
    color: var(--ink-soft);
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.scene-list {
    display: grid;
    gap: 4px;
    max-height: 240px;
    overflow: auto;
}

.scene-list:empty::before {
    content: "No objects";
    color: var(--ink-soft);
    font-size: 10px;
}

.scene-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px;
    align-items: center;
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    text-align: left;
    border-radius: 4px;
}

.scene-item:hover {
    background: #f2f2f2;
}

.scene-item.is-active {
    background: #111;
    border-color: #111;
    color: #fff;
}

.scene-item__meta {
    color: var(--ink-soft);
    font-size: 9px;
    text-transform: uppercase;
}

.scene-item.is-active .scene-item__meta {
    color: rgba(255, 255, 255, 0.7);
}

.toggle-text-button {
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--ink-soft);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.toggle-text-button.is-active {
    color: var(--ink);
}

.hint-block {
    font-size: 0.9rem;
}

.hint-block p {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin: 0;
}

.hint-block span {
    color: var(--ink);
    font-family: var(--font-mono);
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 18px;
    transform: translateX(-50%) translateY(16px);
    padding: 10px 12px;
    border-radius: 4px;
    border: 1px solid #1a1a1a;
    background: #111111;
    color: white;
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease;
}

.toast.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 1180px) {
    body {
        overflow: auto;
    }

    .app-shell {
        min-height: auto;
    }

    .workspace-grid {
        grid-template-columns: 1fr;
        height: auto;
    }

    .tool-panel {
        width: auto !important;
        flex-direction: row !important;
    }

    .viewport-stage {
        min-height: 62vh;
        order: -1;
        border-top: 1px solid var(--line);
        border-bottom: 1px solid var(--line);
    }
}

@media (max-width: 820px) {
    /* ----- Layout ----- */
    body { overflow: hidden; } /* sheet handles scrolling */

    .app-shell {
        padding: 0;
        gap: 0;
        /* leave room for bottom nav */
        padding-bottom: var(--mob-nav-h);
    }

    .workspace-grid {
        display: block;
        height: calc(100dvh - 54px - var(--mob-nav-h)); /* topbar + bottom nav */
    }

    /* Topbar compact : logo + modes + export uniquement */
    .topbar {
        grid-template-columns: auto 1fr auto;
        padding: 6px 10px;
    }

    /* Hide secondary desktop toolbar buttons — accessible via ⋮ sheet */
    .topbar-center { display: none; }
    #newDocButton, #importButton, #exportButton { display: none; }

    /* keep actions visible but strip extra buttons — handled via JS show/hide */
    .topbar-actions {
        gap: 6px;
    }

    .brand-copy h1 { font-size: 13px; }

    /* Sidebars cachées en mobile — remplacées par bottom sheets */
    .tool-panel { display: none !important; }

    /* Viewport prend tout l'espace */
    .viewport-stage {
        height: 100%;
        min-height: 0;
        order: 0;
        border: none;
    }

    .stage-overlay {
        left: 8px;
        right: 8px;
    }

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

    /* ----- Bottom Nav ----- */
    .mob-bottom-nav {
        display: grid;
        grid-template-columns: repeat(6, minmax(0, 1fr));
    }

    /* ----- Bottom Sheet overlay ----- */
    .mob-backdrop {
        display: block;
    }

    .mob-sheet {
        display: flex;
    }
}

/* ===== Mobile Bottom Nav ===== */
.mob-bottom-nav {
    display: none; /* shown only in mobile via media query */
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: var(--mob-nav-h);
    padding-bottom: var(--mob-safe-bottom);
    padding-inline: 6px;
    background: var(--paper-strong);
    border-top: 1px solid var(--line);
    z-index: 1400;
    align-items: stretch;
    justify-content: stretch;
    box-shadow: 0 -10px 28px rgba(0, 0, 0, 0.12);
    isolation: isolate;
}

.mob-nav-btn {
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    border: none;
    background: transparent;
    color: var(--ink-soft);
    font-size: 9px;
    font-family: var(--font-ui);
    letter-spacing: 0.07em;
    text-transform: uppercase;
    cursor: pointer;
    padding: 6px 2px 4px;
    transition: color 0.15s, background 0.15s, transform 0.12s;
    min-height: var(--mob-nav-base-h);
    border-radius: 10px;
}

.mob-nav-btn svg {
    width: 20px;
    height: 20px;
    display: block;
    color: currentColor;
    padding: 3px;
    border-radius: 9px;
    background: var(--panel);
    border: 1px solid var(--line);
}

.mob-nav-btn span {
    display: block;
    line-height: 1.1;
    color: currentColor;
    font-weight: 600;
}

.mob-nav-btn.is-active,
.mob-nav-btn:active {
    color: var(--ink);
    background: var(--accent-soft);
    transform: translateY(-1px);
}

.mob-nav-btn.is-active svg,
.mob-nav-btn:active svg {
    border-color: var(--ink);
    background: color-mix(in srgb, var(--accent-soft) 65%, var(--panel));
}

/* Keep key entry points obvious and always readable */
#mobOpenTools,
#mobOpenPrim,
#mobOpenInsp {
    color: var(--ink);
}

/* ===== Mobile Backdrop ===== */
.mob-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    z-index: 910;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
}

.mob-backdrop.is-open {
    opacity: 1;
    pointer-events: auto;
}

/* ===== Mobile Bottom Sheet ===== */
.mob-sheet {
    display: none; /* shown only on mobile */
    flex-direction: column;
    position: fixed;
    bottom: var(--mob-nav-h); /* above bottom nav */
    left: 0; right: 0;
    max-height: 72dvh;
    background: var(--paper-strong);
    border-top: 1px solid var(--line-strong);
    border-radius: 14px 14px 0 0;
    z-index: 920;
    transform: translateY(100%);
    transition: transform 0.28s cubic-bezier(0.32,0.72,0,1);
    overflow: hidden;
}

.mob-sheet.is-open {
    transform: translateY(0);
}

.mob-sheet-handle {
    width: 36px;
    height: 4px;
    border-radius: 2px;
    background: var(--line-strong);
    margin: 10px auto 0;
    flex-shrink: 0;
}

.mob-sheet-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px 6px;
    flex-shrink: 0;
}

.mob-sheet-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.04em;
    color: var(--ink);
}

.mob-sheet-close {
    border: none;
    background: var(--panel);
    color: var(--ink-soft);
    border-radius: 50%;
    width: 26px; height: 26px;
    font-size: 12px;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
}

.mob-sheet-body {
    overflow-y: auto;
    padding: 8px 16px 16px;
    flex: 1;
    -webkit-overflow-scrolling: touch;
}

.mob-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.mob-rail-tabs {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 8px;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--line);
    scrollbar-width: none;
}

.mob-rail-tabs::-webkit-scrollbar { display: none; }

.mob-rail-tab {
    border: 1px solid var(--line);
    background: var(--panel);
    color: var(--ink-soft);
    border-radius: 6px;
    padding: 5px 12px;
    font-size: 11px;
    white-space: nowrap;
    cursor: pointer;
    font-family: var(--font-ui);
}

.mob-rail-tab.is-active {
    background: var(--ink);
    color: var(--canvas);
    border-color: var(--ink);
}

/* Re-apply mobile visibility after base .mob-* blocks so cascade cannot hide footer */
@media (max-width: 820px) {
    .mob-bottom-nav {
        display: grid;
        grid-template-columns: repeat(6, minmax(0, 1fr));
    }

    .mob-backdrop {
        display: block;
    }

    .mob-sheet {
        display: flex;
    }

    .stage-overlay--bottom {
        bottom: calc(var(--mob-nav-h) + 8px);
    }
}

/* ===== Dark Theme — Adobe-style neutral ===== */
[data-theme="dark"] {
    --paper: #1c1c1c;
    --paper-strong: #232323;
    --canvas: #141414;
    --ink: #e0e0e0;
    --ink-soft: rgba(224, 224, 224, 0.55);
    --panel: #2a2a2a;
    --panel-strong: #303030;
    --line: rgba(255, 255, 255, 0.08);
    --line-strong: rgba(255, 255, 255, 0.14);
    --accent: #e0e0e0;
    --accent-soft: rgba(255, 255, 255, 0.06);
    --shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .chip.is-active,
[data-theme="dark"] .primitive-card.is-active,
[data-theme="dark"] .action-button--accent {
    background: #e0e0e0;
    color: #111;
    border-color: #e0e0e0;
}

[data-theme="dark"] .chip:hover,
[data-theme="dark"] .action-button:hover,
[data-theme="dark"] .primitive-card:hover,
[data-theme="dark"] .asset-card:hover,
[data-theme="dark"] .scene-item:hover,
[data-theme="dark"] .legend-pill--button:hover {
    background: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .action-button--accent:hover {
    background: #e0e0e0;
    color: #111;
    border-color: #e0e0e0;
    filter: brightness(0.96);
}

[data-theme="dark"] .sidebar-rail {
    background: #1a1a1a;
}

[data-theme="dark"] .rail-button.is-active {
    background: #e0e0e0;
    color: #111;
    border-color: #e0e0e0;
}

[data-theme="dark"] .sidebar-toggle,
[data-theme="dark"] .rail-button {
    background: #2a2a2a;
}

[data-theme="dark"] .sidebar-toggle:hover,
[data-theme="dark"] .rail-button:hover {
    background: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .logo-strip {
    background: #111111;
}

[data-theme="dark"] .logo-strip--light {
    background: #2a2a2a;
    color: var(--ink);
}

[data-theme="dark"] .stage-overlay {
    background: rgba(20, 20, 20, 0.88);
}

[data-theme="dark"] #viewport {
    background: #141414;
}

[data-theme="dark"] .legend-pill,
[data-theme="dark"] .scene-item,
[data-theme="dark"] .info-card,
[data-theme="dark"] .select-input,
[data-theme="dark"] .text-input,
[data-theme="dark"] .color-input {
    background: #2a2a2a;
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--ink);
}

[data-theme="dark"] .scene-item.is-active {
    background: #e0e0e0;
    border-color: #e0e0e0;
    color: #111;
}

[data-theme="dark"] .scene-item.is-active .scene-item__meta {
    color: rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] input[type="range"] {
    accent-color: #c0c0c0;
}

[data-theme="dark"] .prefs-row input[type="checkbox"] {
    accent-color: #c0c0c0;
}

[data-theme="dark"] .text-input::placeholder {
    color: rgba(224, 224, 236, 0.35);
}

[data-theme="dark"] .toast {
    background: #e0e0e0;
    color: #111;
    border-color: #e0e0e0;
}



/* ===== Preferences Modal ===== */
.prefs-backdrop {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.45);
}

.prefs-backdrop[hidden] {
    display: none;
}

.prefs-modal {
    width: 380px;
    max-width: 92vw;
    max-height: 80vh;
    overflow-y: auto;
    background: var(--panel-strong);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.prefs-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--line);
}

.prefs-header h2 {
    margin: 0;
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.prefs-close {
    width: 32px;
    height: 32px;
    border: 1px solid var(--line);
    background: transparent;
    color: var(--ink);
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: 4px;
}

.prefs-close:hover {
    background: var(--accent-soft);
}

.prefs-body {
    padding: 14px 16px;
    display: grid;
    gap: 18px;
}

.prefs-group {
    display: grid;
    gap: 10px;
}

.prefs-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    min-height: 32px;
}

.prefs-row span {
    font-size: 11px;
    color: var(--ink);
}

.prefs-row input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: #111;
}

.prefs-row input[type="range"] {
    width: 120px;
}

.prefs-row .text-input {
    width: 80px;
    min-height: 30px;
    padding: 4px 8px;
}

.prefs-row .select-input {
    width: 120px;
    min-height: 30px;
    padding: 4px 8px;
}

/* ===== Startup Session Pop-in ===== */
.startup-backdrop {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.62);
    backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity 0.22s ease;
}

.startup-backdrop[hidden] { display: none; }

.startup-backdrop.is-open { opacity: 1; }

.startup-popin {
    width: min(360px, 92vw);
    background: var(--panel-strong);
    border: 1px solid var(--line);
    border-radius: 10px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.45);
    padding: 28px 24px 22px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transform: scale(0.96) translateY(6px);
    transition: transform 0.22s ease;
}

.startup-backdrop.is-open .startup-popin {
    transform: scale(1) translateY(0);
}

.startup-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.startup-logo img {
    border-radius: 6px;
}

.startup-logo span {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--ink);
}

.startup-title {
    margin: 0;
    font-size: 18px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--ink);
}

.startup-desc {
    margin: 0;
    font-size: 12px;
    color: var(--ink-soft);
    line-height: 1.5;
}

.startup-meta {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.startup-meta span {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 4px;
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    color: var(--accent);
    border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
}

.startup-loading {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    color: var(--ink-soft);
    padding: 6px 0;
}

.startup-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--line);
    border-top-color: var(--accent);
    border-radius: 50%;
    flex-shrink: 0;
    animation: startup-spin 0.7s linear infinite;
}

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

.startup-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.startup-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 6px;
    border: 1px solid var(--line);
    background: transparent;
    color: var(--ink);
    font-size: 13px;
    cursor: pointer;
    text-align: left;
    transition: background 0.12s, border-color 0.12s;
}

.startup-btn:hover {
    background: var(--hover-bg, rgba(128,128,128,0.08));
    border-color: var(--accent);
}

.startup-btn--primary {
    border-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    color: var(--accent);
    font-weight: 600;
}

.startup-btn--primary:hover {
    background: color-mix(in srgb, var(--accent) 24%, transparent);
}

.startup-btn--muted {
    color: var(--ink-soft);
}

.startup-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ===== Architecture Generator Pop-in ===== */
.archi-popin-backdrop {
    position: fixed;
    inset: 0;
    z-index: 110;
    display: flex;
    align-items: stretch;
    justify-content: flex-end;
    padding: 0;
    background: rgba(0, 0, 0, 0.08);
    opacity: 0;
    transition: opacity 0.18s ease;
}

.archi-popin-backdrop[hidden] {
    display: none;
}

.archi-popin-backdrop.is-open {
    opacity: 1;
}

.archi-popin {
    width: min(460px, 92vw);
    height: 100vh;
    max-height: 100vh;
    overflow-y: auto;
    background: var(--panel-strong);
    border-left: 1px solid var(--line);
    border-top: none;
    border-right: none;
    border-bottom: none;
    box-shadow: var(--shadow);
    padding: 14px 16px 16px;
    display: grid;
    gap: 12px;
    transform: translateX(100%);
    transition: transform 0.2s ease;
}

.archi-popin-backdrop.is-open .archi-popin {
    transform: translateX(0);
}

.archi-popin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
    padding-bottom: 10px;
}

.archi-popin-header h2 {
    margin: 0;
    font-size: 15px;
    letter-spacing: -0.01em;
}

.archi-popin-close {
    width: 32px;
    height: 32px;
    border: 1px solid var(--line);
    background: transparent;
    color: var(--ink);
    border-radius: 4px;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.archi-popin-subtitle {
    margin: 0;
    color: var(--ink-soft);
    font-size: 11px;
    line-height: 1.45;
}

.archi-popin-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 6px;
    font-size: 11px;
}

.archi-popin-list li {
    position: relative;
    padding-left: 13px;
    color: var(--ink);
    line-height: 1.4;
}

.archi-popin-list li::before {
    content: '-';
    position: absolute;
    left: 0;
    color: var(--ink-soft);
}

/* ── Style selector bar ────────────────── */
.archi-style-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    border-bottom: 1px dashed var(--line);
    padding-bottom: 10px;
    /* 8 buttons auto-wrap into 2 rows */
}

.archi-style-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 7px 4px;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 5px;
    color: var(--ink-soft);
    cursor: pointer;
    font-size: 10px;
    line-height: 1;
    transition: border-color 0.12s, color 0.12s, background 0.12s;
}

.archi-style-btn:hover {
    border-color: var(--accent);
    color: var(--ink);
}

.archi-style-btn.is-active {
    border-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    color: var(--accent);
}

/* ── Sliders grid (2 columns) ───────────── */
.archi-popin-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.archi-popin-grid .archi-full-row {
    grid-column: 1 / -1;
}

.archi-popin-grid .dropdown-row input[type="range"] {
    width: 90px;
}

/* ── Checkboxes grid (3 columns) ─────────── */
.archi-popin-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    border-top: 1px dashed var(--line);
    border-bottom: 1px dashed var(--line);
    padding: 8px 0;
}

.archi-popin-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

@media (max-width: 900px) {
    .archi-popin-backdrop {
        align-items: center;
        justify-content: center;
        padding: 18px;
        background: rgba(0, 0, 0, 0.5);
    }

    .archi-popin {
        width: min(620px, 96vw);
        height: auto;
        max-height: 82vh;
        border: 1px solid var(--line);
        padding: 12px;
        transform: scale(0.98);
    }

    .archi-popin-backdrop.is-open .archi-popin {
        transform: scale(1);
    }

    .archi-style-bar {
        grid-template-columns: repeat(4, 1fr);
        /* 8 buttons = 2 rows on mobile too */
    }

    .archi-popin-grid {
        grid-template-columns: 1fr;
    }

    .archi-popin-grid .dropdown-row input[type="range"] {
        width: 100%;
    }

    .archi-popin-options {
        grid-template-columns: repeat(3, 1fr);
    }

    .archi-popin-actions {
        flex-wrap: wrap;
    }
}

/* ===== GPU Info Badge ===== */
.gpu-info-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-secondary, #f4f4f4);
    border: 1px solid var(--line, #e0e0e0);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 11px;
    color: var(--ink, #333);
    overflow: hidden;
}

.gpu-info-icon {
    font-size: 16px;
    flex-shrink: 0;
}

#gpuInfoName {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
}

.gpu-info-tier {
    flex-shrink: 0;
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.gpu-info-tier.tier-high {
    background: #d4edda;
    color: #155724;
}

.gpu-info-tier.tier-mid {
    background: #fff3cd;
    color: #856404;
}

.gpu-info-tier.tier-low {
    background: #f8d7da;
    color: #721c24;
}

[data-theme="dark"] .gpu-info-badge {
    background: #1a1a2e;
    border-color: #2f3336;
    color: #ccc;
}

[data-theme="dark"] .gpu-info-tier.tier-high {
    background: #1b4332;
    color: #95d5b2;
}

[data-theme="dark"] .gpu-info-tier.tier-mid {
    background: #3d2e00;
    color: #ffd166;
}

[data-theme="dark"] .gpu-info-tier.tier-low {
    background: #3d0000;
    color: #f4a0a0;
}

/* ===== Render Dropdown ===== */
.topbar-dropdown {
    position: relative;
}

.topbar-dropdown-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    z-index: 60;
    width: 280px;
    max-height: 72vh;
    overflow-y: auto;
    background: var(--panel-strong);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    padding: 10px;
    display: grid;
    gap: 12px;
}

.topbar-dropdown-menu[hidden] {
    display: none;
}

.dropdown-group {
    display: grid;
    gap: 8px;
}

.dropdown-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    font-size: 11px;
    color: var(--ink);
}

.dropdown-row input[type="color"] {
    width: 32px;
    height: 24px;
    padding: 1px;
    border: 1px solid var(--line);
    border-radius: 3px;
    background: var(--panel);
    cursor: pointer;
}

.dropdown-row input[type="range"] {
    width: 100px;
}

.dropdown-row .select-input {
    width: 100px;
    min-height: 26px;
    padding: 2px 6px;
    font-size: 10px;
}

/* ===== Autosave Indicator ===== */
.autosave-indicator {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 50;
    font-size: 10px;
    font-family: var(--font-mono);
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 4px;
    border: 1px solid rgba(45, 138, 78, 0.3);
    background: rgba(45, 138, 78, 0.1);
    color: #2d8a4e;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.autosave-indicator.is-ok {
    color: #2d8a4e;
    border-color: rgba(45, 138, 78, 0.3);
    background: rgba(45, 138, 78, 0.1);
}

.autosave-indicator.is-fail {
    color: #c53030;
    border-color: rgba(197, 48, 48, 0.3);
    background: rgba(197, 48, 48, 0.1);
}

[data-theme="dark"] .autosave-indicator.is-ok {
    color: #6bff84;
    border-color: rgba(107, 255, 132, 0.25);
    background: rgba(107, 255, 132, 0.08);
}

[data-theme="dark"] .autosave-indicator.is-fail {
    color: #ff6b6b;
    border-color: rgba(255, 107, 107, 0.25);
    background: rgba(255, 107, 107, 0.08);
}

/* ── Custom Scrollbars ── */

/* Firefox */
.sidebar-content,
.scene-list,
.topbar-dropdown-menu,
#keyframeList,
.prefs-modal {
    scrollbar-width: thin;
    scrollbar-color: var(--line-strong) transparent;
}

/* Webkit (Chrome, Edge, Safari) */
.sidebar-content::-webkit-scrollbar,
.scene-list::-webkit-scrollbar,
.topbar-dropdown-menu::-webkit-scrollbar,
#keyframeList::-webkit-scrollbar,
.prefs-modal::-webkit-scrollbar {
    width: 4px;
}

.sidebar-content::-webkit-scrollbar-track,
.scene-list::-webkit-scrollbar-track,
.topbar-dropdown-menu::-webkit-scrollbar-track,
#keyframeList::-webkit-scrollbar-track,
.prefs-modal::-webkit-scrollbar-track {
    background: transparent;
    margin: 6px 0;
}

.sidebar-content::-webkit-scrollbar-thumb,
.scene-list::-webkit-scrollbar-thumb,
.topbar-dropdown-menu::-webkit-scrollbar-thumb,
#keyframeList::-webkit-scrollbar-thumb,
.prefs-modal::-webkit-scrollbar-thumb {
    background: var(--line-strong);
    border-radius: 99px;
    min-height: 32px;
    transition: background 0.2s;
}

.sidebar-content::-webkit-scrollbar-thumb:hover,
.scene-list::-webkit-scrollbar-thumb:hover,
.topbar-dropdown-menu::-webkit-scrollbar-thumb:hover,
#keyframeList::-webkit-scrollbar-thumb:hover,
.prefs-modal::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Dark theme scrollbar refinement */
[data-theme="dark"] .sidebar-content,
[data-theme="dark"] .scene-list,
[data-theme="dark"] .topbar-dropdown-menu,
[data-theme="dark"] #keyframeList,
[data-theme="dark"] .prefs-modal {
    scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
}

[data-theme="dark"] .sidebar-content::-webkit-scrollbar-thumb,
[data-theme="dark"] .scene-list::-webkit-scrollbar-thumb,
[data-theme="dark"] .topbar-dropdown-menu::-webkit-scrollbar-thumb,
[data-theme="dark"] #keyframeList::-webkit-scrollbar-thumb,
[data-theme="dark"] .prefs-modal::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.18);
}

[data-theme="dark"] .sidebar-content::-webkit-scrollbar-thumb:hover,
[data-theme="dark"] .scene-list::-webkit-scrollbar-thumb:hover,
[data-theme="dark"] .topbar-dropdown-menu::-webkit-scrollbar-thumb:hover,
[data-theme="dark"] #keyframeList::-webkit-scrollbar-thumb:hover,
[data-theme="dark"] .prefs-modal::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* ===== Neon — Synth Theme ===== */
[data-theme="neon"] {
    --paper:        #0a0a18;
    --paper-strong: #0d0d20;
    --canvas:       #05050e;
    --ink:          #e8e0ff;
    --ink-soft:     rgba(232, 224, 255, 0.50);
    --panel:        #12102a;
    --panel-strong: #181530;
    --line:         rgba(180, 100, 255, 0.14);
    --line-strong:  rgba(180, 100, 255, 0.28);
    --accent:       #00f5ff;
    --accent-soft:  rgba(0, 245, 255, 0.08);
    --shadow:       0 10px 32px rgba(0, 0, 0, 0.7), 0 0 24px rgba(0, 245, 255, 0.06);
}

/* Topbar */
[data-theme="neon"] .topbar {
    background: #07071a;
    border-bottom-color: rgba(180,100,255,0.22);
    box-shadow: 0 1px 0 rgba(0,245,255,0.07);
}
[data-theme="neon"] .brand-block h1 {
    background: linear-gradient(90deg, #00f5ff, #cc44ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Active chips */
[data-theme="neon"] .chip.is-active,
[data-theme="neon"] .primitive-card.is-active,
[data-theme="neon"] .action-button--accent {
    background: #00f5ff;
    color: #05050e;
    border-color: #00f5ff;
    box-shadow: 0 0 12px rgba(0,245,255,0.45);
}
[data-theme="neon"] .rail-button.is-active {
    background: #cc44ff;
    color: #05050e;
    border-color: #cc44ff;
    box-shadow: 0 0 10px rgba(204,68,255,0.45);
}
[data-theme="neon"] .scene-item.is-active {
    background: #12102a;
    border-color: #00f5ff;
    color: #00f5ff;
    box-shadow: 0 0 8px rgba(0,245,255,0.2);
}
[data-theme="neon"] .mob-rail-tab.is-active {
    background: #00f5ff;
    color: #05050e;
    border-color: #00f5ff;
}

/* Hover states */
[data-theme="neon"] .chip:hover,
[data-theme="neon"] .action-button:hover,
[data-theme="neon"] .primitive-card:hover,
[data-theme="neon"] .rail-button:hover,
[data-theme="neon"] .scene-item:hover,
[data-theme="neon"] .legend-pill--button:hover {
    background: rgba(0, 245, 255, 0.07);
    border-color: rgba(0, 245, 255, 0.3);
}

[data-theme="neon"] .action-button--accent:hover {
    background: #00f5ff;
    color: #05050e;
    border-color: #00f5ff;
    box-shadow: 0 0 16px rgba(0,245,255,0.55);
}

/* Sidebar */
[data-theme="neon"] .sidebar-rail,
[data-theme="neon"] .sidebar-rail--right {
    background: #07071a;
    border-color: rgba(180,100,255,0.18);
}
[data-theme="neon"] .sidebar-toggle,
[data-theme="neon"] .rail-button {
    background: #12102a;
}
[data-theme="neon"] .logo-strip {
    background: #07071a;
    border-color: rgba(180,100,255,0.18);
}
[data-theme="neon"] .logo-strip--light {
    background: #12102a;
}

/* Viewport */
[data-theme="neon"] #viewport {
    background: #05050e;
}
[data-theme="neon"] .stage-overlay {
    background: rgba(5,5,14,0.85);
    border-color: rgba(180,100,255,0.18);
}

/* Panels & inputs */
[data-theme="neon"] .legend-pill,
[data-theme="neon"] .scene-item,
[data-theme="neon"] .info-card,
[data-theme="neon"] .select-input,
[data-theme="neon"] .text-input,
[data-theme="neon"] .color-input {
    background: #12102a;
    border-color: rgba(180,100,255,0.18);
    color: var(--ink);
}
[data-theme="neon"] input[type="range"] {
    accent-color: #00f5ff;
}
[data-theme="neon"] .prefs-row input[type="checkbox"] {
    accent-color: #cc44ff;
}

/* Toast */
[data-theme="neon"] .toast {
    background: #00f5ff;
    color: #05050e;
    border-color: #00f5ff;
    box-shadow: 0 0 20px rgba(0,245,255,0.4);
}

/* Dropdown menus */
[data-theme="neon"] .topbar-dropdown-menu,
[data-theme="neon"] .prefs-modal,
[data-theme="neon"] .ctx-menu {
    background: #0d0d20;
    border-color: rgba(180,100,255,0.28);
    box-shadow: 0 8px 32px rgba(0,0,0,0.8), 0 0 24px rgba(120,0,220,0.12);
}

/* Bottom nav (mobile) */
[data-theme="neon"] .mob-bottom-nav {
    background: #07071a;
    border-top-color: rgba(180,100,255,0.22);
}
[data-theme="neon"] .mob-nav-btn.is-active {
    color: #00f5ff;
}
[data-theme="neon"] .mob-sheet {
    background: #0d0d20;
    border-top-color: rgba(180,100,255,0.3);
}

/* Scrollbars */
[data-theme="neon"] .sidebar-content::-webkit-scrollbar-thumb,
[data-theme="neon"] .scene-list::-webkit-scrollbar-thumb,
[data-theme="neon"] .topbar-dropdown-menu::-webkit-scrollbar-thumb {
    background: rgba(0,245,255,0.2);
}
[data-theme="neon"] .sidebar-content::-webkit-scrollbar-thumb:hover,
[data-theme="neon"] .scene-list::-webkit-scrollbar-thumb:hover,
[data-theme="neon"] .topbar-dropdown-menu::-webkit-scrollbar-thumb:hover {
    background: #00f5ff;
}

/* ===== Vertex edit — rubber-band marquee ===== */
.vertex-marquee {
    position: absolute;
    pointer-events: none;
    border: 1.5px solid rgba(100, 160, 255, 0.9);
    background: rgba(100, 160, 255, 0.10);
    box-shadow: 0 0 0 1px rgba(100, 160, 255, 0.3);
    z-index: 50;
}

/* ===== Context Menu ===== */
.ctx-menu {
    position: fixed;
    z-index: 9999;
    min-width: 160px;
    padding: 4px 0;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--line);
    border-radius: 6px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.14);
    backdrop-filter: blur(12px);
    font-family: 'Inter', sans-serif;
    font-size: 12px;
}
.ctx-item {
    display: block;
    width: 100%;
    padding: 6px 14px;
    border: none;
    background: none;
    text-align: left;
    cursor: pointer;
    color: var(--ink);
    font-size: 12px;
    font-family: inherit;
}
.ctx-item:hover {
    background: var(--accent);
    color: #fff;
}
.ctx-item:disabled {
    opacity: 0.35;
    pointer-events: none;
}
.ctx-item--danger { color: #d63333; }
.ctx-item--danger:hover { background: #d63333; color: #fff; }
.ctx-sep {
    margin: 4px 10px;
    border: none;
    border-top: 1px solid var(--line);
}

/* ===== Procedural Panel ===== */
.proc-panel {
    width: 260px;
}
.proc-patterns {
    display: flex;
    gap: 4px;
    margin-top: 4px;
}
.proc-pat {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: var(--surface);
    color: var(--ink-soft);
    cursor: pointer;
    transition: all .15s;
}
.proc-pat:hover { border-color: var(--accent); color: var(--accent); }
.proc-pat.is-active { background: var(--accent); color: #fff; border-color: var(--accent); }
.proc-val {
    min-width: 32px;
    text-align: right;
    font-size: 10px;
    font-family: 'IBM Plex Mono', monospace;
    color: var(--ink-soft);
    flex-shrink: 0;
}
.proc-actions {
    padding-top: 4px;
}
.proc-generate {
    width: 100%;
    margin-top: 6px;
    text-align: center;
    justify-content: center;
}

[data-theme="dark"] .ctx-menu {
    background: rgba(20, 20, 34, 0.96);
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}