:root {
    --primary-color: #7A868C;
    --secondary-color: #7A868C;
    --accent-color: #00964d;
    --success-color: #2ecc71;
    --light-color: #ecf0f1;
    --dark-color: #7A868C;
    --gradient-start: #00964d;
    --gradient-end: #00964d;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    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%);
    color: var(--dark-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    padding: 15px 0;
    text-align: center;
    border-radius: 15px 15px 0 0;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(45deg, transparent 49%, rgba(255,255,255,0.1) 50%, transparent 51%),
        linear-gradient(-45deg, transparent 49%, rgba(255,255,255,0.1) 50%, transparent 51%);
    background-size: 20px 20px;
}


h1 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    position: relative;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1rem;
    opacity: 0.9;
    position: relative;
}

.login-container {
    background-color: white;
    border-radius: 15px;
    box-shadow: var(--shadow);
    padding: 40px;
    max-width: 500px;
    margin: 0 auto 40px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
}

.login-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.form-group {
    margin-bottom: 25px;
    position: relative;
}

label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--secondary-color);
}

.input-group {
    position: relative;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e1e5ee;
    border-radius: 10px;
    font-size: 1rem;
    transition: var(--transition);
    background-color: #f8f9fa;
}

input:focus {
    border-color: var(--primary-color);
    outline: none;
    background-color: white;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.password-toggle {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #7f8c8d;
    transition: var(--transition);
    background: none;
    border: none;
    font-size: 1.2rem;
}

.password-toggle:hover {
    color: var(--primary-color);
}

.btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border: none;
    padding: 15px 25px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    transition: var(--transition);
    width: 100%;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

.btn:active {
    transform: translateY(0);
}

.downloads-container {
    display: none;
    animation: fadeIn 0.5s ease;
}

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

.welcome-message {
    text-align: center;
    margin-bottom: 30px;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.categories {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-top: 30px;
}

.category {
    background-color: white;
    border-radius: 15px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.category:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.category-header {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    padding: 20px;
    font-size: 1.4rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.category-header i {
    font-size: 1.6rem;
}

.sublist {
    padding: 0;
}

.sublist-item {
    border-bottom: 1px solid #eee;
    padding: 18px 20px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.sublist-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 5px;
    background: var(--primary-color);
    transform: scaleY(0);
    transition: var(--transition);
}

.sublist-item:hover::before {
    transform: scaleY(1);
}

.sublist-item:hover {
    background-color: #f8f9fa;
    padding-left: 30px;
}

.sublist-item:last-child {
    border-bottom: none;
}

.download-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-decoration: none;
    color: var(--dark-color);
    transition: var(--transition);
}

.download-link:hover {
    color: var(--primary-color);
}

.download-icon {
    color: var(--primary-color);
    font-weight: bold;
    transition: var(--transition);
}

.download-link:hover .download-icon {
    transform: translateY(3px);
}

.logout-container {
    text-align: center;
    margin-top: 50px;
}

.logout-btn {
    background: linear-gradient(135deg, var(--accent-color), #009845);
    width: auto;
    padding: 12px 30px;
    box-shadow: 0 4px 15px rgba(123, 134, 140, 0.3);
}

.logout-btn:hover {
    box-shadow: 0 6px 20px rgba(123, 134, 140, 0.4);
}

.error-message {
    color: var(--accent-color);
    margin-top: 15px;
    text-align: center;
    display: none;
    background: rgba(231, 76, 60, 0.1);
    padding: 12px;
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.success-message {
    color: var(--success-color);
    margin-top: 15px;
    text-align: center;
    display: none;
    background: rgba(46, 204, 113, 0.1);
    padding: 12px;
    border-radius: 8px;
    border-left: 4px solid var(--success-color);
}

/* Header de usuario reorganizado */
.user-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
    padding: 15px 25px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.user-welcome {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 500;
}

.user-welcome i {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.header-buttons {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* Ajustar botones para header */
.header-buttons .btn {
    width: auto;
    padding: 10px 20px;
    font-size: 0.9rem;
    margin: 0;
}

/* Botón Admin en header */
.admin-btn {
    background: linear-gradient(135deg, #d33520, #b82e1c);
    box-shadow: 0 4px 15px rgba(173, 170, 170, 0.3);
}

.admin-btn:hover {
    box-shadow: 0 6px 20px rgba(173, 170, 170, 0.3);
}

/* Botón Logout en header */
.logout-btn {
    background: linear-gradient(135deg, #009845, #2a8b47);
    box-shadow: 0 4px 15px rgba(173, 170, 170, 0.3);
}

.logout-btn:hover {
    box-shadow: 0 6px 20px rgba(173, 170, 170, 0.3);
}

/* Responsive */
@media (max-width: 768px) {
    .user-header {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }
    
    .user-welcome {
        justify-content: center;
    }
    
    .header-buttons {
        justify-content: center;
        width: 100%;
    }
    
    .header-buttons .btn {
        flex: 1;
        max-width: 200px;
    }
}

@media (max-width: 480px) {
    .header-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .header-buttons .btn {
        width: 100%;
        max-width: none;
    }
}

/* ******************************************* */


@media (max-width: 768px) {
    .categories {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 2.2rem;
    }
    
    .login-container {
        padding: 30px 20px;
    }
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.floating {
    animation: floating 3s ease-in-out infinite;
}

@keyframes floating {
    0% { transform: translate(0, 0px); }
    50% { transform: translate(0, 10px); }
    100% { transform: translate(0, -0px); }
}
@media (max-width: 1200px) {
    .categories {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .categories {
        grid-template-columns: 1fr;
    }
}
/* *****************logotipo*************************** */
/* Contenedor del logo */
.logo-img-container {
    text-align: center;
    margin-bottom: 15px;
}

/* Logo responsivo */
.logo-img {
    max-width: 250px;
    height: auto;
    display: inline-block;
}

/* Responsive para el logo */
@media (max-width: 768px) {
    .logo-img {
        max-width: 120px;
    }
}

@media (max-width: 480px) {
    .logo-img {
        max-width: 100px;
    }
}