body {
    background-color: var(--bg-main, #f8fafc);
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.auth-card {
    background: var(--bg-card, white);
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border-color, #e2e8f0);
}

.auth-card h2 {
    margin: 0 0 5px 0;
    color: var(--text-primary, #0f172a);
    font-size: 1.8rem;
    text-align: center;
}

.auth-card p.subtitle {
    text-align: center;
    color: var(--text-secondary, #64748b);
    margin-bottom: 25px;
    font-size: 0.95rem;
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    color: #475569;
    font-size: 0.9rem;
    font-weight: 600;
}

.input-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 1rem;
    box-sizing: border-box;
    outline: none;
    transition: 0.2s;
    background: #f8fafc;
}

.input-group input:focus {
    border-color: var(--accent-blue, #3b82f6);
    background: white;
}

.auth-btn {
    width: 100%;
    background: #0f172a;
    color: white;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: 0.2s;
    margin-top: 10px;
}

.auth-btn:hover {
    background: var(--accent-blue, #3b82f6);
}

.error-message {
    color: var(--danger, #ef4444);
    font-size: 0.9rem;
    text-align: center;
    margin-top: 15px;
    display: none;
    font-weight: 600;
}

.toggle-text {
    text-align: center;
    margin-top: 25px;
    color: var(--text-secondary, #64748b);
    font-size: 0.95rem;
}

.toggle-text a {
    color: var(--accent-blue, #3b82f6);
    font-weight: bold;
    text-decoration: none;
    cursor: pointer;
}

.toggle-text a:hover {
    text-decoration: underline;
}