/* Premium Design System - Part 1: Core */
:root {
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-tertiary: #1a1a24;
    --color-bg-card: rgba(26, 26, 36, 0.85);
    --color-bg-glass: rgba(255, 255, 255, 0.03);
    --color-jumbo: #6366f1;
    --color-jumbo-light: #818cf8;
    --color-jumbo-glow: rgba(99, 102, 241, 0.3);
    --color-delight: #ec4899;
    --color-delight-light: #f472b6;
    --color-delight-glow: rgba(236, 72, 153, 0.3);
    --color-hobby: #10b981;
    --color-hobby-light: #34d399;
    --color-hobby-glow: rgba(16, 185, 129, 0.3);
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #3b82f6;
    --color-text-primary: #f8fafc;
    --color-text-secondary: #94a3b8;
    --color-text-tertiary: #64748b;
    --color-text-muted: #475569;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-hover: rgba(255, 255, 255, 0.15);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --font-primary: 'Inter', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --space-xs: 0.25rem; --space-sm: 0.5rem; --space-md: 1rem;
    --space-lg: 1.5rem; --space-xl: 2rem; --space-2xl: 3rem;
    --radius-sm: 6px; --radius-md: 10px; --radius-lg: 16px; --radius-full: 9999px;
    --transition-fast: 150ms ease; --transition-base: 250ms ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-primary); font-size: 16px; line-height: 1.6;
    color: var(--color-text-primary); background: var(--color-bg-primary);
    min-height: 100vh; -webkit-font-smoothing: antialiased;
}
.bg-gradient {
    position: fixed; inset: 0; z-index: -2;
    background: radial-gradient(ellipse at 20% 20%, var(--color-jumbo-glow) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 80%, var(--color-delight-glow) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 50%, var(--color-hobby-glow) 0%, transparent 60%);
    animation: bgPulse 20s ease-in-out infinite;
}
@keyframes bgPulse { 0%, 100% { opacity: 0.5; } 50% { opacity: 0.8; } }
.bg-grid {
    position: fixed; inset: 0; z-index: -1;
    background-image: linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}
.header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(10,10,15,0.8); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color); padding: var(--space-md) var(--space-xl);
}
.header-content {
    max-width: 1400px; margin: 0 auto; display: flex;
    justify-content: space-between; align-items: center; gap: var(--space-lg);
}
.logo { display: flex; align-items: center; gap: var(--space-md); }
.logo-icon {
    width: 48px; height: 48px; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--color-jumbo), var(--color-delight));
    border-radius: var(--radius-md); color: white;
}
.logo-icon svg { width: 28px; height: 28px; }
.logo-text h1 {
    font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-text-secondary));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.logo-subtitle { font-size: 0.75rem; color: var(--color-text-tertiary); text-transform: uppercase; letter-spacing: 0.1em; }
.header-actions { display: flex; align-items: center; gap: var(--space-lg); }
.status-indicator {
    display: flex; align-items: center; gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md); background: var(--color-bg-glass);
    border: 1px solid var(--border-color); border-radius: var(--radius-full);
}
.status-dot { width: 8px; height: 8px; background: var(--color-success); border-radius: 50%; animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.6; } }
.status-text { font-size: 0.75rem; font-weight: 500; color: var(--color-text-secondary); text-transform: uppercase; }
.btn {
    display: inline-flex; align-items: center; gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg); font-family: var(--font-primary);
    font-size: 0.875rem; font-weight: 500; border-radius: var(--radius-md);
    border: 1px solid transparent; cursor: pointer; transition: all var(--transition-base);
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: linear-gradient(135deg, var(--color-jumbo), var(--color-delight)); color: white; }
.btn-primary:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 4px 20px var(--color-jumbo-glow); }
.btn-secondary { background: var(--color-bg-tertiary); color: var(--color-text-primary); border-color: var(--border-color); }
.btn-outline { background: transparent; color: var(--color-text-secondary); border-color: var(--border-color); }
.btn-outline:hover:not(:disabled) { background: var(--color-bg-glass); color: var(--color-text-primary); }
.main-content { max-width: 1400px; margin: 0 auto; padding: var(--space-2xl) var(--space-xl); display: flex; flex-direction: column; gap: var(--space-2xl); }