/* 1. Global Variables & Base Setup */
:root {
    --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: rgba(0, 0, 0, 0.1);
}

.dark {
    --glass-bg: rgba(15, 23, 42, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: rgba(0, 0, 0, 0.4);
}

body {
    scroll-behavior: smooth;
    background-color: #f8fafc;
    transition: background 0.5s ease;
}

/* 2. Animated Background for Dark Mode (Glass Highlight) */
.dark body {
    background: 
        radial-gradient(at 0% 0%, rgba(79, 70, 229, 0.12) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(168, 85, 247, 0.12) 0px, transparent 50%),
        #0f172a;
    background-attachment: fixed;
}

/* 3. The Ultimate Glass Panel */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 2rem;
    box-shadow: 0 10px 30px -5px var(--glass-shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-panel:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 20px 40px -10px var(--glass-shadow);
}

/* 4. Shimmer & Hover Effects */
.btn-shimmer {
    position: relative;
    overflow: hidden;
}

.btn-shimmer::after {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(45deg);
    transition: 0.6s;
    pointer-events: none;
}

.btn-shimmer:hover::after {
    left: 120%;
}

/* 5. Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: #c7d2fe;
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background: #4f46e5; }

/* Mobile Optimization */
@media (max-width: 768px) {
    .glass-panel {
        border-radius: 1.5rem; /* Mobile par thode chote corners */
        padding: 1.5rem;
        backdrop-filter: blur(8px); /* Mobile performance ke liye blur thoda kam */
    }

    h2 {
        line-height: 1.2;
    }

    /* Buttons par active effect (Touch feedback) */
    button:active {
        transform: scale(0.95);
        transition: 0.1s;
    }
}

/* Custom scrollbar for mobile touch */
.overscroll-contain {
    -webkit-overflow-scrolling: touch;
}