* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-dark);
    color: white;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

body.mobile-mode {
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto; /* Allow body scrolling on mobile if containers overflow */
    height: auto;
    min-height: 100vh;
    display: flex;
}

/* --- Multi-Layered Background --- */
.bg-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.bg-circuit {
    background-image: 
        radial-gradient(circle at 50% 50%, rgba(112, 0, 255, 0.05), transparent 70%),
        linear-gradient(rgba(0, 242, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 242, 255, 0.02) 1px, transparent 1px);
    background-size: 100% 100%, 50px 50px, 50px 50px;
}

.bg-glow {
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), var(--glow-cyan) 0%, transparent 40%);
    opacity: 0.3;
}

/* Utility: Layout */
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.flex-row { display: flex; flex-direction: row; }
.flex-center { display: flex; justify-content: center; align-items: center; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-1 { flex: 1; }

.gap-xs { gap: 8px; }
.gap-sm { gap: 12px; }
.gap-md { gap: 16px; }
.gap-lg { gap: 24px; }
.gap-xl { gap: 32px; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.text-center { text-align: center; }
.text-right { text-align: right; }

.mt-10 { margin-top: 10px; }
.mt-15 { margin-top: 15px; }
.mt-20 { margin-top: 20px; }
.mt-30 { margin-top: 30px; }
.mb-8 { margin-bottom: 8px; }
.mb-10 { margin-bottom: 10px; }
.mb-12 { margin-bottom: 12px; }
.mb-15 { margin-bottom: 15px; }
.mb-20 { margin-bottom: 20px; }
.mb-30 { margin-bottom: 30px; }

.opacity-50 { opacity: 0.5; }
.bold { font-weight: 700; }
.italic { font-style: italic; }

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