/* Variables para consistencia */
:root {
    /*VALORES PARA DESARROLLO --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);*/
    --primary-gradient: linear-gradient(135deg, #0b3d2e 0%, #145a32 100%);
    --secondary-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --primary-color: #667eea;
    --error-color: #ff4757;
    --success-color: #2ed573;
    --shadow-light: 0 10px 20px rgba(102, 126, 234, 0.3);
    --shadow-medium: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Reset y estilos base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--primary-gradient);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* Contenedor principal */
.login-container {
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow-medium);
    width: 100%;
    max-width: 400px;
    overflow: hidden;
    animation: fadeIn 0.6s ease-out;
}

/* Logo */
.logo-etsist {
    display: block;
    margin: 0 auto 15px auto;
    height: 60px;
    width: auto;
    object-fit: contain;
}

/* Cabecera */
.login-header {
    background: var(--secondary-gradient);
    color: white;
    text-align: center;
    padding: 30px 20px;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 10px;
}

.login-header p {
    font-size: 14px;
    opacity: 0.9;
}

/* Formulario */
.login-form {
    padding: 30px;
}

.form-group {
    margin-bottom: 20px;
    transition: transform 0.3s ease;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.1);
}

/* Estados de los inputs */
.form-group input:invalid {
    border-color: var(--error-color);
}

.form-group input:valid {
    border-color: var(--success-color);
}

/* Efectos de escala para JS */
.form-group.scaled {
    transform: scale(1.02);
}

/* Botón */
.login-button {
    width: 100%;
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 16px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

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

/* Footer */
.login-footer {
    text-align: center;
    padding: 20px;
    color: #666;
    font-size: 12px;
    border-top: 1px solid #eee;
}

/* Debug (solo desarrollo) */
.debug-csrf {
    position: fixed;
    bottom: 10px;
    right: 10px;
    background: #f0f0f0;
    padding: 5px;
    border: 1px solid #ccc;
    z-index: 9999;
    font-size: 10px;
    max-width: 200px;
    word-break: break-all;
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.form-group.error {
    animation: shake 0.3s ease-in-out;
}

/* Responsive */
@media (max-width: 480px) {
    .login-container {
        border-radius: 15px;
    }

    .login-header {
        padding: 25px 15px;
    }

    .login-header h1 {
        font-size: 24px;
    }

    .login-form {
        padding: 25px;
    }

    .form-group input {
        padding: 12px;
    }

    .login-button {
        padding: 14px;
    }
}