:root {
    /* Singularity Design System - Core Tokens */
    --singularity-cyan: #00f2c3;
    --singularity-cyan-dim: rgba(0, 242, 195, 0.1);
    --singularity-magenta: #ff00aa;
    --singularity-magenta-dim: rgba(255, 0, 170, 0.1);
    --singularity-bg-dark: #0a0a0c;
    --singularity-bg-darker: #050507;
    --singularity-glass-bg: rgba(255, 255, 255, 0.03);
    --singularity-glass-border: rgba(255, 255, 255, 0.1);
    --singularity-text-bright: #ffffff;
    --singularity-text-dim: #a0a0b0;

    /* Semantic Mappings */
    --primary-color: var(--singularity-cyan);
    --secondary-color: var(--singularity-magenta);
    --bg-color: var(--singularity-bg-darker);
    --text-color: var(--singularity-text-bright);

    /* Legacy Compatibility Aliases */
    --cyan-accent: var(--singularity-cyan);
    --magenta-accent: var(--singularity-magenta);
    --bg-dark: var(--singularity-bg-dark);
    --bg-darker: var(--singularity-bg-darker);
    --glass-bg: var(--singularity-glass-bg);
    --glass-border: var(--singularity-glass-border);
    --text-bright: var(--singularity-text-bright);
    --text-dim: var(--singularity-text-dim);
}

/* Base Reset/Defaults for Singularity Theme */
body.singularity-theme {
    background-color: var(--singularity-bg-darker);
    color: var(--singularity-text-bright);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-image:
        radial-gradient(circle at 15% 50%, rgba(0, 242, 195, 0.04) 0%, transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(255, 0, 170, 0.04) 0%, transparent 25%);
}

/* Glass Card Utility */
.glass-card {
    background: var(--singularity-glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--singularity-glass-border);
    border-radius: 16px;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-2px);
    border-color: rgba(0, 242, 195, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* HUD Corner Decorations */
.hud-corner {
    position: absolute;
    width: 12px;
    height: 12px;
    border-color: var(--singularity-cyan);
    border-style: solid;
    border-width: 0;
    pointer-events: none;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.glass-card:hover .hud-corner {
    opacity: 1;
    box-shadow: 0 0 8px var(--singularity-cyan);
}

.hud-tl {
    top: 0;
    left: 0;
    border-top-width: 2px;
    border-left-width: 2px;
    border-top-left-radius: 4px;
}

.hud-tr {
    top: 0;
    right: 0;
    border-top-width: 2px;
    border-right-width: 2px;
    border-top-right-radius: 4px;
}

.hud-bl {
    bottom: 0;
    left: 0;
    border-bottom-width: 2px;
    border-left-width: 2px;
    border-bottom-left-radius: 4px;
}

.hud-br {
    bottom: 0;
    right: 0;
    border-bottom-width: 2px;
    border-right-width: 2px;
    border-bottom-right-radius: 4px;
}

/* Text & Typography */
.text-gradient {
    background: linear-gradient(135deg, var(--singularity-cyan), #ffffff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.text-mono {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Buttons */
.btn-singularity {
    background: rgba(0, 242, 195, 0.1);
    color: var(--singularity-cyan);
    border: 1px solid rgba(0, 242, 195, 0.3);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-singularity:hover {
    background: rgba(0, 242, 195, 0.2);
    box-shadow: 0 0 15px rgba(0, 242, 195, 0.3);
    transform: translateY(-1px);
}

.btn-singularity-primary {
    background: var(--singularity-cyan);
    color: #000;
    border: 1px solid var(--singularity-cyan);
}

.btn-singularity-primary:hover {
    background: #00c9a3;
    box-shadow: 0 0 20px rgba(0, 242, 195, 0.5);
}