:root {
    --primary-color: #2E86DE; /* Azul del logotipo Garguz */
    --primary-hover: #1a6fc2; /* Azul más oscuro para hover */
    --accent-color: #8BC34A; /* Verde lima del logotipo */
    --light-color: #f4f8fc;
    --dark-color: #2c3e50;
    --white-color: #ffffff;
    --danger-color: #e74c3c;
    --border-radius: 12px;
    --box-shadow: 0 8px 30px rgba(46, 134, 222, 0.15);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #e8f0fe, #d4e6f9, #eaf6e5);
    margin: 0;
}

.login-container {
    padding: 45px 40px;
    background-color: var(--white-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    width: 100%;
    max-width: 400px;
    text-align: center;
    animation: fadeIn 0.5s ease-in-out;
    border-top: 4px solid var(--primary-color);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-logo {
    width: 80px;
    margin-bottom: 15px;
}

h1 {
    color: var(--dark-color);
    margin-bottom: 8px;
    font-size: 1.8rem;
}

.error-message {
    color: var(--white-color);
    background-color: var(--danger-color);
    padding: 10px;
    border-radius: 6px;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    text-align: left;
}

label {
    font-weight: bold;
    color: #4a6785;
    margin-bottom: 5px;
    display: block;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #c8d8e8;
    transition: border-color 0.3s, box-shadow 0.3s;
    box-sizing: border-box;
}

input[type="text"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(46, 134, 222, 0.2);
}

.btn-login {
    padding: 15px;
    background: linear-gradient(135deg, var(--primary-color), #1a6fc2);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(46, 134, 222, 0.3);
}

.btn-login:hover {
    background: linear-gradient(135deg, #1a6fc2, #155daa);
    box-shadow: 0 6px 16px rgba(46, 134, 222, 0.4);
    transform: translateY(-1px);
}

.btn-login:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px rgba(46, 134, 222, 0.3);
}