:root {
    /* Sophisticated Dark Palette */
    --bg-dark: #050505;
    --bg-card: rgba(20, 20, 25, 0.7);
    --primary-neon: #6366f1;
    --secondary-neon: #ec4899;
    --accent-cyan: #06b6d4;
    --text-main: #ffffff;
    --text-dim: #94a3b8;
    --border-glass: rgba(255, 255, 255, 0.1);
    --border-glow: rgba(99, 102, 241, 0.3);

    /* Shadows & Glows */
    --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.8);
    --glow-primary: 0 0 15px rgba(99, 102, 241, 0.5);
    --glow-secondary: 0 0 15px rgba(236, 72, 153, 0.5);

    /* System */
    --radius-xl: 24px;
    --radius-lg: 16px;
    --transition-base: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Outfit', 'Inter', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    /* CSS Aurora Background */
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(236, 72, 153, 0.15) 0px, transparent 50%);
}

/* Header Styling */
.g4f-header {
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-glass);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: white;
    font-weight: 900;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-neon), var(--secondary-neon));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--glow-primary);
    position: relative;
}

.logo-icon::after {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(135deg, var(--primary-neon), var(--secondary-neon));
    border-radius: 14px;
    z-index: -1;
    opacity: 0.5;
    filter: blur(8px);
}

.lang-switch {
    display: flex;
    background: rgba(255, 255, 255, 0.05);
    padding: 4px;
    border-radius: 100px;
    border: 1px solid var(--border-glass);
}

.lang-btn {
    padding: 8px 20px;
    border: none;
    background: transparent;
    color: var(--text-dim);
    cursor: pointer;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition-base);
}

.lang-btn.active {
    background: white;
    color: black;
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
}

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: auto;
    gap: 24px;
    margin-top: 40px;
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 32px;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.glass-card:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    transition: 0.5s;
}

.glass-card:hover::before {
    left: 100%;
}

/* Typography Animation */
@keyframes titleReveal {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 900;
    text-align: center;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
    animation: titleReveal 0.8s ease-out;
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    .bento-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .bento-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 3rem; }
    .g4f-header { padding: 0 20px; }
}