:root {
    --foreground: #e0e0e0;
    --card-bg: rgba(30, 30, 30, 0.6);
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    color: #e0e0e0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(29, 78, 216, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

main {
    flex: 1;
    overflow-y: auto;
}

.container {
    display: flex;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.card {
    width: 100%;
    max-width: 500px;
    background: var(--card-bg);
    padding: 2rem;
    text-align: center;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 60px var(--shadow-color);
    backdrop-filter: blur(20px);
}

.card h1 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.card p {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    font-weight: 500;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    border: none;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
    transform: translateY(-2px);
}