/* ================================================
   LOGIN PAGE STYLES - Liga Saber Panel de Profesor
   ================================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* ================================================
   CONTAINER PRINCIPAL
   ================================================ */

.login-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    max-width: 1200px;
    width: 100%;
    background: white;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    min-height: 600px;
}

/* ================================================
   LADO IZQUIERDO - Branding
   ================================================ */

.login-left {
    background: linear-gradient(135deg, #1A237E 0%, #667eea 100%);
    color: white;
    padding: 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.branding {
    max-width: 400px;
}

.logo {
    width: 120px;
    height: auto;
    margin-bottom: 30px;
    filter: brightness(0) invert(1);
}

.login-left h1 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.2;
}

.login-left p {
    font-size: 16px;
    line-height: 1.6;
    opacity: 0.9;
    margin-bottom: 40px;
}

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

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    opacity: 0.95;
}

.feature-icon {
    font-size: 24px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

/* ================================================
   LADO DERECHO - Formulario
   ================================================ */

.login-right {
    padding: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-box {
    width: 100%;
    max-width: 400px;
}

.login-header {
    margin-bottom: 32px;
}

.login-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: #1A237E;
    margin-bottom: 8px;
}

.login-header p {
    font-size: 15px;
    color: #666;
}

/* ================================================
   FORMULARIO
   ================================================ */

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: #333;
}

.form-group input {
    padding: 14px 16px;
    border: 2px solid #E0E0E0;
    border-radius: 12px;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s ease;
    background: white;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.form-group input::placeholder {
    color: #999;
}

/* ================================================
   OPCIONES DEL FORMULARIO
   ================================================ */

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: -8px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #666;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #667eea;
}

.forgot-password {
    font-size: 14px;
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: #1A237E;
}

/* ================================================
   BOTÓN DE LOGIN
   ================================================ */

.btn-login {
    padding: 16px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 8px;
}

.btn-login:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.btn-login:active:not(:disabled) {
    transform: translateY(0);
}

.btn-login:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Loader */
.loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ================================================
   MENSAJE DE ERROR
   ================================================ */

.error-message {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: #FFEBEE;
    border: 2px solid #F44336;
    border-radius: 12px;
    color: #C62828;
    font-size: 14px;
    margin-top: 8px;
    animation: slideDown 0.3s ease;
}

.error-icon {
    font-size: 20px;
}

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

/* ================================================
   FOOTER
   ================================================ */

.login-footer {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid #E0E0E0;
    text-align: center;
}

.login-footer p {
    font-size: 14px;
    color: #666;
}

.login-footer a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.login-footer a:hover {
    text-decoration: underline;
}

/* ================================================
   RESPONSIVE DESIGN
   ================================================ */

@media (max-width: 968px) {
    .login-container {
        grid-template-columns: 1fr;
    }

    .login-left {
        display: none;
    }

    .login-right {
        padding: 40px 24px;
    }
}

@media (max-width: 480px) {
    .login-right {
        padding: 30px 20px;
    }

    .login-header h2 {
        font-size: 28px;
    }

    .login-box {
        max-width: 100%;
    }

    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}