:root {
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --background-color: #0f172a;
    --card-background: #1e293b;
    --text-primary: rgba(255, 255, 255, 0.95);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --error-color: #ef4444;
    --border-color: rgba(255, 255, 255, 0.08);
    --shadow-color: rgba(0, 0, 0, 0.25);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background: var(--background-color);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background-image: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.1) 0%, rgba(15, 23, 42, 0) 80%);
}

.auth-container {
    width: 100%;
    max-width: 420px;
}

.auth-card {
    background: var(--card-background);
    padding: 2.5rem;
    border-radius: 1.25rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    animation: fadeIn 0.5s ease-out;
}

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

.auth-title {
    color: var(--primary-light);
    font-size: 2.25rem;
    text-align: center;
    margin-bottom: 0.75rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.auth-subtitle {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1rem;
    color: var(--text-secondary);
}

.auth-input {
    width: 100%;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem 1rem 1rem 2.75rem;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.auth-input:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.auth-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.auth-button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
    margin-top: 0.5rem;
}

.auth-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.3);
}

.auth-button:active {
    transform: translateY(0);
}

.auth-footer {
    text-align: center;
    color: var(--text-secondary);
    margin-top: 2rem;
    font-size: 0.9rem;
}

.auth-link {
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

.auth-link:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.error-messages {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error-color);
    border-radius: 0.75rem;
    padding: 1rem;
    margin-bottom: 0.5rem;
}

.error-message {
    color: var(--error-color);
    font-size: 0.9rem;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 480px) {
    .auth-card {
        padding: 2rem 1.5rem;
    }

    .auth-title {
        font-size: 2rem;
    }
    
    .auth-input {
        padding: 0.875rem 0.875rem 0.875rem 2.5rem;
    }
}