:root {
    --primary: #4361ee;
    --secondary: #3f37c9;
    --error: #f72585;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 420px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    animation: fadeIn 0.6s ease;
}

.header {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    padding: 24px;
    text-align: center;
}

.header h1 {
    font-weight: 600;
    font-size: 1.8rem;
}

.form-container {
    padding: 32px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

.input-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border 0.3s;
}

.input-group input:focus {
    border-color: var(--primary);
    outline: none;
}

.login-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.3s;
}

.login-btn:hover {
    opacity: 0.9;
}

.footer {
    text-align: center;
    padding: 16px;
    color: #777;
    font-size: 0.9rem;
    border-top: 1px solid #eee;
}

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

.error-message {
    color: var(--error);
    text-align: center;
    margin-top: 16px;
    /*display: none;*/
}