:root {
    --primary-blue: #0052A5;
    --primary-orange: #FF7200;
    --light-bg: #f5f5f5;
    --light-text: #333;
    --dark-bg: #222;
    --dark-text: #f5f5f5;
    --card-light-bg: #fff;
    --card-dark-bg: #333;
    --shadow-light: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-dark: 0 4px 8px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    transition: var(--transition);
}

.light-theme {
    background-color: var(--light-bg);
    color: var(--light-text);
}

.dark-theme {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: white;
    box-shadow: var(--shadow-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

.dark-theme header {
    background-color: #111;
    box-shadow: var(--shadow-dark);
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo {
    height: 50px;
}

.theme-toggle button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--primary-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    transition: var(--transition);
}

.theme-toggle button:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.dark-theme .theme-toggle button {
    color: var(--primary-orange);
}

.dark-theme .theme-toggle button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.fa-sun {
    display: none;
}

.fa-moon {
    display: block;
}

.dark-theme .fa-sun {
    display: block;
}

.dark-theme .fa-moon {
    display: none;
}

main {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--primary-blue);
}

h1 span {
    color: var(--primary-orange);
}

.subtitle {
    text-align: center;
    margin-bottom: 2rem;
    font-style: italic;
    color: #666;
}

.dark-theme .subtitle {
    color: #aaa;
}

.apps-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.app-card {
    background-color: var(--card-light-bg);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    cursor: pointer;
}

.dark-theme .app-card {
    background-color: var(--card-dark-bg);
    box-shadow: var(--shadow-dark);
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.dark-theme .app-card:hover {
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.4);
}

.app-image {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.app-info {
    padding: 1.5rem;
}

.app-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-blue);
}

.dark-theme .app-name {
    color: var(--primary-orange);
}

.app-description {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 1rem;
}

.dark-theme .app-description {
    color: #bbb;
}

.app-link {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--primary-orange);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: var(--transition);
}

.app-link:hover {
    background-color: #e66700;
}

.dark-theme .app-link {
    background-color: var(--primary-blue);
}

.dark-theme .app-link:hover {
    background-color: #004080;
}

footer {
    text-align: center;
    padding: 1.5rem;
    background-color: var(--primary-blue);
    color: white;
    margin-top: 2rem;
}

/* Botón flotante para gestionar aplicaciones */
.floating-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--primary-orange);
    color: white;
    border: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 99;
}

.floating-btn:hover {
    transform: scale(1.1);
    background-color: #e66700;
}

.dark-theme .floating-btn {
    background-color: var(--primary-blue);
}

.dark-theme .floating-btn:hover {
    background-color: #004080;
}

/* Modal para gestionar aplicaciones */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    overflow-y: auto;
}

.modal-content {
    background-color: var(--card-light-bg);
    margin: 50px auto;
    padding: 2rem;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: var(--shadow-light);
}

.dark-theme .modal-content {
    background-color: var(--card-dark-bg);
    box-shadow: var(--shadow-dark);
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 1.8rem;
    cursor: pointer;
    color: #666;
}

.dark-theme .close-modal {
    color: #bbb;
}

.close-modal:hover {
    color: var(--primary-orange);
}

.modal h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-blue);
}

.dark-theme .modal h2 {
    color: var(--primary-orange);
}

/* Opciones del modal */
.modal-options {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.option-btn {
    display: flex;
    align-items: center;
    padding: 1.2rem;
    background-color: #f5f5f5;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.1rem;
    color: var(--light-text);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.dark-theme .option-btn {
    background-color: #444;
    color: var(--dark-text);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.option-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.option-btn i {
    font-size: 1.5rem;
    margin-right: 1rem;
}

#add-app-btn i {
    color: var(--primary-blue);
}

#remove-app-btn i {
    color: #ff3b30;
}

.dark-theme #add-app-btn i {
    color: var(--primary-orange);
}

/* Responsive adjustments for modal */
@media (max-width: 480px) {
    .modal-content {
        margin: 30px auto;
        padding: 1.5rem;
    }
    
    .floating-btn {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
    }
    
    .option-btn {
        padding: 1rem;
        font-size: 1rem;
    }
    
    .option-btn i {
        font-size: 1.3rem;
    }
}

@media (max-width: 768px) {
    header {
        padding: 1rem;
    }
    
    .logo {
        height: 40px;
    }
    
    main {
        padding: 1rem;
    }
    
    .apps-container {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .apps-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .app-info {
        padding: 1rem;
    }
}

/* Estilos para formularios */
.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    background-color: white;
    color: #333;
}

.dark-theme .form-group input,
.dark-theme .form-group textarea {
    border-color: #444;
    background-color: #222;
    color: #f5f5f5;
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.image-preview {
    margin-top: 10px;
    width: 100%;
    height: 150px;
    border: 1px dashed #ddd;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.dark-theme .image-preview {
    border-color: #444;
}

.image-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.submit-btn {
    display: block;
    width: 100%;
    padding: 0.8rem;
    background-color: var(--primary-orange);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    background-color: #e66700;
}

.dark-theme .submit-btn {
    background-color: var(--primary-blue);
}

.dark-theme .submit-btn:hover {
    background-color: #004080;
}

/* Lista de aplicaciones para eliminar */
.apps-list {
    max-height: 400px;
    overflow-y: auto;
}

.app-list-item {
    display: flex;
    align-items: center;
    padding: 0.8rem;
    border-bottom: 1px solid #eee;
}

.dark-theme .app-list-item {
    border-bottom-color: #444;
}

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

.app-list-image {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 5px;
    margin-right: 1rem;
}

.app-list-info {
    flex: 1;
}

.app-list-name {
    font-weight: 500;
    margin-bottom: 0.3rem;
    color: var(--primary-blue);
}

.dark-theme .app-list-name {
    color: var(--primary-orange);
}

.app-list-description {
    font-size: 0.9rem;
    color: #666;
}

.dark-theme .app-list-description {
    color: #bbb;
}

.edit-app-btn {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.edit-app-btn:hover {
    background-color: #45a049;
}

#edit-app-btn {
    background-color: #2196F3;
}

#edit-app-btn:hover {
    background-color: #1976D2;
}

.delete-app-btn {
    background-color: #ff3b30;
    color: white;
    border: none;
    border-radius: 5px;
    padding: 0.5rem 0.8rem;
    cursor: pointer;
    transition: var(--transition);
}

.delete-app-btn:hover {
    background-color: #e0352b;
}

/* Estilos para el área de usuario */
.user-controls {
    display: flex;
    align-items: center;
}

.user-info {
    display: flex;
    align-items: center;
    margin-right: 20px;
}

#username-display {
    margin-right: 10px;
    font-weight: 500;
}

.login-btn, .logout-btn {
    background-color: var(--primary-blue);
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    margin-left: 10px;
}

.login-btn:hover, .logout-btn:hover {
    background-color: #003d7a;
}

.dark-theme .login-btn, .dark-theme .logout-btn {
    background-color: var(--primary-orange);
}

.dark-theme .login-btn:hover, .dark-theme .logout-btn:hover {
    background-color: #e56500;
}

/* Mensaje de no hay aplicaciones */
.no-apps {
    text-align: center;
    padding: 20px;
    color: #666;
    font-style: italic;
}

.dark-theme .no-apps {
    color: #aaa;
}

.register-link {
    margin-top: 20px;
    text-align: center;
    border-top: 1px solid #ddd;
    padding-top: 15px;
}

.register-link a {
    color: #007bff;
    text-decoration: none;
}

.register-link a:hover {
    text-decoration: underline;
}

.form-group small {
    display: block;
    color: #666;
    font-size: 0.8em;
    margin-top: 5px;
}

.form-group input[type="date"] {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1em;
}