:root {
    --bg-panel: #0f172a;
    --bg-card: #1e293b;
    --accent: #6366f1;
}
body {
    font-family: 'Inter', sans-serif;
    background-color: #090d16;
    color: #f8fafc;
    overflow-x: hidden;
}
.mono {
    font-family: 'JetBrains Mono', monospace;
}
/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: #0f172a;
}
::-webkit-scrollbar-thumb {
    background: #334155;
    border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
    background: #475569;
}
.paper-shadow {
    box-shadow:
        0 25px 50px -12px rgba(0, 0, 0, 0.75),
        0 0 1px 1px rgba(255, 255, 255, 0.08);
}
input[type="range"] {
    accent-color: #6366f1;
}
.font-preload {
    position: absolute;
    left: -9999px;
    top: -9999px;
    visibility: hidden;
    pointer-events: none;
}

/* Mobile Tab Visibility (<1024px) */
@media (max-width: 1023px) {
    .mobile-hidden {
        display: none !important;
    }
}

/* ---------------------------------------------------------------- */
/* Insert Palette (Drop #7 UI)                                       */
/* ---------------------------------------------------------------- */
.ui-modal {
    position: fixed;
    inset: 0;
    z-index: 60;
    background: rgba(2, 6, 23, 0.82);
    backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.ui-modal.open { display: flex; }
.ui-modal-card {
    background: #0b1220;
    border: 1px solid #1e293b;
    border-radius: 18px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.65);
    width: min(1040px, 100%);
    max-height: 92vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.ui-modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px;
    border-bottom: 1px solid #1e293b;
}
.ui-modal-title {
    font-size: 16px;
    font-weight: 700;
    color: #f8fafc;
}
.ui-modal-subtitle {
    margin-top: 4px;
    font-size: 11px;
    color: #94a3b8;
}
.ui-modal-close {
    color: #94a3b8;
    padding: 6px;
    border-radius: 8px;
    cursor: pointer;
}
.ui-modal-close:hover { background: #1e293b; color: #ffffff; }

.insert-palette-toolbar {
    padding: 14px 20px;
    border-bottom: 1px solid #1e293b;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.insert-palette-search {
    width: 100%;
    background: #020617;
    border: 1px solid #334155;
    border-radius: 10px;
    padding: 9px 12px;
    color: #e2e8f0;
    font-size: 12px;
    outline: none;
}
.insert-palette-search:focus { border-color: #6366f1; }
.insert-palette-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.insert-category-chip {
    font-size: 10px;
    padding: 4px 9px;
    border-radius: 999px;
    background: #0f172a;
    border: 1px solid #334155;
    color: #cbd5e1;
    cursor: pointer;
}
.insert-category-chip.active {
    background: #4f46e5;
    border-color: #818cf8;
    color: #ffffff;
}
.insert-palette-grid {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px 22px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 10px;
}
.insert-palette-card {
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px;
    border-radius: 12px;
    background: #0f172a;
    border: 1px solid #1e293b;
    color: #e2e8f0;
    cursor: pointer;
    transition: background 120ms ease, border-color 120ms ease, transform 120ms ease;
}
.insert-palette-card:hover {
    background: #111c34;
    border-color: #4f46e5;
    transform: translateY(-1px);
}
.insert-palette-title {
    font-size: 12px;
    font-weight: 700;
    color: #f8fafc;
}
.insert-palette-cat {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #818cf8;
}
.insert-palette-desc {
    font-size: 10.5px;
    color: #94a3b8;
    line-height: 1.4;
}
.insert-palette-empty {
    grid-column: 1 / -1;
    padding: 32px;
    text-align: center;
    color: #64748b;
    font-size: 12px;
}

/* ---------------------------------------------------------------- */
/* Expanded Canvas Viewer                                            */
/* ---------------------------------------------------------------- */
.canvas-expand-modal {
    position: fixed;
    inset: 0;
    z-index: 70;
    background: rgba(2, 6, 23, 0.97);
    backdrop-filter: blur(8px);
    display: none;
    flex-direction: column;
}
.canvas-expand-modal.open { display: flex; }
.canvas-expand-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 18px;
    border-bottom: 1px solid #1e293b;
    background: #0b1220;
}
.canvas-expand-title {
    font-size: 13px;
    font-weight: 700;
    color: #f8fafc;
}
.canvas-expand-subtitle {
    font-size: 10px;
    color: #94a3b8;
}
.canvas-expand-action {
    font-size: 11px;
    padding: 6px 10px;
    border-radius: 8px;
    background: #1e293b;
    border: 1px solid #334155;
    color: #e2e8f0;
    cursor: pointer;
}
.canvas-expand-action.primary {
    background: #4f46e5;
    border-color: #6366f1;
    color: #ffffff;
}
.expanded-canvas-stack {
    flex: 1;
    overflow: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 22px;
}
.expanded-page {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}
.expanded-page-label {
    font-size: 10px;
    color: #64748b;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.expanded-page-canvas {
    max-width: 100%;
    height: auto;
    background: #ffffff;
    border-radius: 3px;
    box-shadow: 0 22px 60px rgba(0, 0, 0, 0.6);
}