:root {
    --bg-primary: #020617;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-primary: #f8fafc;
    --text-muted: #94a3b8;
    --glass-blur: 24px;
    --accent-blue: #3b82f6;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --card-bg: rgba(255, 255, 255, 0.8);
    --card-border: rgba(0, 0, 0, 0.05);
    --text-primary: #0f172a;
    --text-muted: #64748b;
    --accent-blue: #2563eb;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 20px rgba(59, 130, 246, 0.05); }
    50% { box-shadow: 0 0 40px rgba(59, 130, 246, 0.15); }
}

body {
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 55%), 
        radial-gradient(at 50% 0%, hsla(225,39%,30%,0.8) 0, transparent 50%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,0.8) 0, transparent 55%);
    background-attachment: fixed;
    color: var(--text-primary);
    overflow-x: hidden;
    /* Fluid Typography */
    font-size: clamp(14px, 1vw + 10px, 18px);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

[data-theme="light"] body {
    background-image: none !important;
    background-color: var(--bg-primary);
}

.animate-fade-in {
    animation: fadeIn 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-slide-up {
    animation: slideInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--card-border);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.6);
}

.glass-premium {
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 50px 100px -30px rgba(0, 0, 0, 0.7);
}

/* Custom Scrollbar for Premium Feel */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 100px;
    border: 2px solid transparent;
    background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
    background-clip: content-box;
}

/* Mobile Optimizations */
@media (max-width: 640px) {
    .glass-card {
        padding: 1.5rem !important;
        border-radius: 24px !important;
    }
}