/* 
 * GD Creative AI - Global Premium Design System 
 * [v1.0.0] Focused on Premium Aesthetics & Performance
 */

:root {
    --bg-dark: #050505;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --border-glass: rgba(255, 255, 255, 0.1);
    
    /* Brand Colors */
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-gold: #f59e0b;
    --accent-red: #ef4444;
    --accent-green: #10b981;
    
    /* Gradients */
    --grad-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --grad-premium: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --grad-dark: linear-gradient(180deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0) 100%);
    
    /* Text */
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography Enhancements */
h1, h2, h3, h4 {
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.text-gradient {
    background: var(--grad-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Premium Layout Components */
.glass-panel {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: 24px;
}

/* Section Styling */
section {
    padding: 100px 0;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Hero Special */
.hero-premium {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 120px;
}

.hero-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0) 70%);
    top: -200px;
    right: -100px;
    pointer-events: none;
    z-index: 0;
}

/* AI Studio Cards */
.studio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.studio-card {
    padding: 2.5rem;
    transition: all 0.4s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.studio-card:hover {
    transform: translateY(-10px);
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
}

.studio-card .icon-wrapper {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

/* Brand Planning Specific Color */
.icon-red { background: rgba(239, 68, 68, 0.1); color: var(--accent-red); }
.icon-blue { background: rgba(59, 130, 246, 0.1); color: var(--accent-blue); }
.icon-purple { background: rgba(139, 92, 246, 0.1); color: var(--accent-purple); }
.icon-gold { background: rgba(245, 158, 11, 0.1); color: var(--accent-gold); }
.icon-green { background: rgba(16, 185, 129, 0.1); color: var(--accent-green); }

/* Buttons */
.btn-premium {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 100px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--grad-primary);
    color: white;
    box-shadow: 0 10px 30px -10px rgba(59, 130, 246, 0.5);
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 40px -10px rgba(59, 130, 246, 0.6);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-glass);
    color: white;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
}

/* Footer */
footer {
    padding: 80px 0;
    border-top: 1px solid var(--border-glass);
    background: rgba(0,0,0,0.5);
}

/* Responsive */
@media (max-width: 768px) {
    section { padding: 60px 0; }
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    .container { padding: 0 1.5rem; }
}

/* User Dropdown Refinement */
.dropdown-link-item { 
    display: block; 
    padding: 10px 14px; 
    color: #fff; 
    text-decoration: none; 
    font-size: 0.9rem; 
    border-radius: 8px; 
    transition: 0.2s; 
    font-weight: 500; 
}
.dropdown-link-item:hover { 
    background: rgba(255, 255, 255, 0.08); 
    color: #fff; 
}