:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --light-bg: #ecf0f1;
    --white: #ffffff;
    --text-dark: #2c3e50;
    --text-muted: #7f8c8d;
    --border-color: #bdc3c7;
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #90caf9 0%, #e3f2fd 30%, #ffffff 70%, #b3e5fc 100%);
    position: relative;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    overflow: hidden;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 3px 3px, rgba(52, 152, 219, 0.2) 2px, transparent 0);
    background-size: 60px 60px;
    animation: slide 30s linear infinite;
    pointer-events: none;
}

body::after {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.25) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(40px);
    animation: rotate 20s linear infinite;
    pointer-events: none;
}

/* Agregar después del body::after existente */

.login-container::before {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -80px;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(100, 181, 246, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(40px);
    animation: rotateReverse 25s linear infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes rotateReverse {
    0% {
        transform: rotate(0deg) scale(1);
    }
    50% {
        transform: rotate(-180deg) scale(1.1);
    }
    100% {
        transform: rotate(-360deg) scale(1);
    }
}

@keyframes slide {
    0% {
        transform: translateY(0) translateX(0);
    }
    100% {
        transform: translateY(60px) translateX(60px);
    }
}

@keyframes rotate {
    0% {
        transform: rotate(0deg) scale(1);
    }
    50% {
        transform: rotate(180deg) scale(1.2);
    }
    100% {
        transform: rotate(360deg) scale(1);
    }
}

.login-container {
    background: var(--white);
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
    max-width: 450px;
    width: 100%;
}

.login-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 40px 40px 30px;
    text-align: center;
}

.login-header h1 {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.login-header p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 400;
}

.login-body {
    padding: 40px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: var(--transition);
    color: var(--text-dark);
    background: var(--white);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(52, 152, 219, 0.12);
    transform: translateY(-1px);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.input-with-icon {
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 16px;
    pointer-events: none;
}

.input-with-icon input {
    padding-left: 46px;
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--accent-color) 0%, #2980b9 100%);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-login i {
    font-size: 16px;
}

.btn-login:hover {
    background: linear-gradient(135deg, #2980b9 0%, #21618c 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.btn-login:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    opacity: 0.6;
}

.alert {
    padding: 14px 16px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    font-size: 14px;
    border-left: 4px solid;
    font-weight: 500;
}

.alert-danger {
    background: #fee;
    color: #c33;
    border-left-color: #e74c3c;
}

.alert-success {
    background: #d5f4e6;
    color: #155724;
    border-left-color: var(--success-color);
}

.loading {
    display: none;
    text-align: center;
    margin-top: 16px;
}

.spinner {
    border: 3px solid var(--light-bg);
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    width: 28px;
    height: 28px;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

.login-footer {
    padding: 20px 40px;
    background: #f8f9fa;
    border-top: 1px solid #e9ecef;
    text-align: center;
}

.login-footer p {
    font-size: 13px;
    color: var(--text-muted);
    margin: 0;
}

@media (max-width: 480px) {
    .login-container {
        max-width: 100%;
    }

    .login-header {
        padding: 30px 25px 20px;
    }

    .login-header h1 {
        font-size: 22px;
    }

    .login-body {
        padding: 30px 25px;
    }

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

/* Sistema de Notificaciones */
.notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    pointer-events: none;
}

.notification {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 16px 20px;
    margin-bottom: 12px;
    min-width: 320px;
    max-width: 400px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-left: 4px solid;
    transform: translateX(450px);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: auto;
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
}

.notification.success {
    border-left-color: #27ae60;
}

.notification.error {
    border-left-color: #e74c3c;
}

.notification.warning {
    border-left-color: #f39c12;
}

.notification-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: white;
    flex-shrink: 0;
}

.notification.success .notification-icon {
    background: #27ae60;
}

.notification.error .notification-icon {
    background: #e74c3c;
}

.notification.warning .notification-icon {
    background: #f39c12;
}

.notification-content {
    flex: 1;
}

.notification-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0 0 4px 0;
}

.notification-message {
    font-size: 13px;
    color: var(--text-muted);
    margin: 0;
}

.notification-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 16px;
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
    transition: var(--transition);
    width: 28px;
    height: 28px;
}

.notification-close:hover {
    background: rgba(0, 0, 0, 0.1);
    color: var(--text-dark);
}

@media (max-width: 768px) {
    .notification-container {
        top: 10px;
        right: 10px;
        left: 10px;
    }

    .notification {
        min-width: auto;
        max-width: none;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-container {
    animation: fadeInUp 0.6s ease-out;
}

.login-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

.header-icon-corner {
    position: absolute;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 90px;
    height: 90px;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: rgba(255, 255, 255, 0.9);
    border: 3px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.login-header {
    position: relative;
    padding-top: 140px; /* Espacio para el icono */
}