:root {
    /* High-End Dark Theme */
    --bg-dark: #030712;
    --bg-mesh-1: #4f46e5;
    --bg-mesh-2: #c026d3;
    
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 20px 40px -8px rgba(0, 0, 0, 0.5);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-color: #818cf8;
    --accent-glow: rgba(129, 140, 248, 0.25);
    
    --radius-xl: 32px;
    --radius-md: 12px;
    
    --ease-smooth: cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(79, 70, 229, 0.08), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(192, 38, 211, 0.05), transparent 25%);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1.5rem;
}

.login-card {
    background: rgba(20, 20, 30, 0.4);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 3rem;
    box-shadow: var(--glass-shadow);
    width: 100%;
    max-width: 420px;
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-smooth) forwards;
}

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #fff, #94a3b8);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    margin-left: 0.25rem;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

input::placeholder {
    color: var(--text-muted);
}

input:focus {
    border-color: var(--accent-color);
    background: rgba(0, 0, 0, 0.3);
    box-shadow: 0 0 0 4px rgba(129, 140, 248, 0.1);
}

.btn {
    width: 100%;
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s ease;
    margin-top: 1rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px -4px var(--accent-glow);
    filter: brightness(1.1);
}

.btn:active {
    transform: translateY(0);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 2rem 1.5rem;
    }
}