:root:not([data-ui-theme]),
:root[data-ui-theme="win98"] {
    --font-main: 'VT323', monospace;
    --desktop-bg: #008080;
    --desktop-pattern: radial-gradient(circle, rgba(0, 0, 0, 0.12) 1px, transparent 1px);
    --surface-window: #c0c0c0;
    --surface-control: #c0c0c0;
    --surface-input: #ffffff;
    --surface-status: #b3b3b3;
    --text-primary: #000000;
    --title-bg: #000080;
    --title-text: #ffffff;
    --border-outer: #000000;
    --border-input: #000000;
    --border-muted: #808080;
    --window-border-width: 2px;
    --control-border-width: 1px;
    --input-border-width: 2px;
    --window-shadow: inset 1px 1px #dfdfdf, inset -1px -1px #808080;
    --button-shadow: inset 1px 1px #dfdfdf, inset -1px -1px #808080;
    --button-shadow-active: inset 1px 1px #808080, inset -1px -1px #dfdfdf;
    --focus-ring: inset 0 0 0 1px #000080;
    --card-bg: #ffffff;
    --card-text: #000000;
    --card-border: #000000;
    --card-border-width: 2px;
    --selected-outline: 2px dotted currentColor;
    --modal-overlay: rgba(0, 0, 0, 0.45);
}

:root[data-ui-theme="win98"][data-theme="dark"] {
    --desktop-bg: #0a0a0a;
    --desktop-pattern: radial-gradient(circle, rgba(0, 255, 80, 0.08) 1px, transparent 1px);
    --surface-window: #2b2b2b;
    --surface-control: #2b2b2b;
    --surface-input: #111111;
    --surface-status: #1b1b1b;
    --text-primary: #e0e0e0;
    --title-bg: #000000;
    --title-text: #00ff66;
    --border-outer: #000000;
    --border-input: #555555;
    --border-muted: #3b3b3b;
    --window-shadow: inset 1px 1px #3a3a3a, inset -1px -1px #1a1a1a;
    --button-shadow: inset 1px 1px #3a3a3a, inset -1px -1px #1a1a1a;
    --button-shadow-active: inset 1px 1px #1a1a1a, inset -1px -1px #3a3a3a;
    --focus-ring: inset 0 0 0 1px #00ff66;
    --card-bg: #171717;
    --card-text: #00ff66;
    --card-border: #555555;
}

body {
    background-color: var(--desktop-bg);
    background-image: var(--desktop-pattern);
    background-size: 4px 4px;
}

.preview-board,
.voting-board {
    background: #0f6d3d;
    border: 2px solid #000;
}

:root[data-ui-theme="win98"][data-theme="dark"] .preview-board,
:root[data-ui-theme="win98"][data-theme="dark"] .voting-board {
    background: #0a2c14;
}

.preset-modal-overlay {
    background: var(--modal-overlay);
}

.skeleton-line,
.skeleton-board,
.skeleton-table,
.skeleton-list,
.skeleton-controls {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.08));
    background-size: 220% 100%;
    border: 1px solid var(--border-muted);
    animation: skeleton-shimmer 1.2s ease infinite;
}

@keyframes skeleton-shimmer {
    from { background-position: 0 0; }
    to { background-position: -200% 0; }
}