/* ===== Variables CSS ===== */
:root {
    --primary-color: #4F46E5;
    --primary-hover: #4338CA;
    --secondary-color: #6B7280;
    --success-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --background: #F9FAFB;
    --surface: #FFFFFF;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --border-color: #E5E7EB;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* ===== Reset y Estilos Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

/* ===== Login Page ===== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-box {
    background: var(--surface);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
    animation: fadeInUp 0.5s ease-out;
}

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

.logo {
    text-align: center;
    margin-bottom: 20px;
}

.logo i {
    font-size: 64px;
    color: var(--primary-color);
}

.login-box h1 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 28px;
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 14px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 14px;
}

.form-group label i {
    margin-right: 6px;
    color: var(--primary-color);
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="url"],
.form-group input[type="color"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group small {
    display: block;
    margin-top: 6px;
    color: var(--text-secondary);
    font-size: 12px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    margin-right: 8px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.btn-login:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-login i {
    margin-right: 8px;
}

.error-message {
    margin-top: 16px;
    padding: 12px;
    background: #FEE2E2;
    border: 1px solid #FECACA;
    border-radius: 8px;
    color: #DC2626;
    font-size: 14px;
    display: flex;
    align-items: center;
}

.error-message i {
    margin-right: 8px;
}

.login-footer {
    margin-top: 20px;
    text-align: center;
    color: var(--text-secondary);
}

/* ===== Dashboard Layout ===== */
.dashboard {
    display: flex;
    min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
    width: 280px;
    background: var(--surface);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.sidebar-header i {
    font-size: 32px;
    color: var(--primary-color);
}

.sidebar-header h2 {
    font-size: 20px;
    color: var(--text-primary);
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    gap: 12px;
    font-weight: 500;
}

.nav-item:hover {
    background: var(--background);
    color: var(--primary-color);
}

.nav-item.active {
    background: var(--background);
    color: var(--primary-color);
    border-right: 3px solid var(--primary-color);
}

.nav-item i {
    font-size: 18px;
    width: 24px;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    padding: 10px;
    background: var(--background);
    border-radius: 8px;
}

.user-info i {
    font-size: 20px;
    color: var(--primary-color);
}

.user-info span {
    font-weight: 500;
    font-size: 14px;
}

.btn-change-password {
    width: 100%;
    padding: 10px;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 8px;
}

.btn-change-password:hover {
    background: #4B5563;
    transform: translateY(-2px);
}

.btn-logout {
    width: 100%;
    padding: 10px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-logout:hover {
    background: #DC2626;
    transform: translateY(-2px);
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 30px;
    overflow-y: auto;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.content-header h1 {
    font-size: 32px;
    color: var(--text-primary);
}

.btn-primary {
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    padding: 12px 24px;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: #4B5563;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

/* ===== Search and Filters ===== */
.search-bar {
    position: relative;
    margin-bottom: 20px;
}

.search-bar i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-bar input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
}

.filter-group {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.filter-group label {
    font-weight: 500;
    color: var(--text-primary);
}

.filter-group select {
    padding: 10px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--surface);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalAppear 0.3s ease-out;
}

.modal-large {
    max-width: 900px;
}

@keyframes modalAppear {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 20px;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.3s ease;
}

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

.modal-content form {
    padding: 24px;
}

.modal-body {
    padding: 24px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
}

/* ===== Alert Styles ===== */
.alert-info {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: #DBEAFE;
    border-radius: 8px;
    color: #1E40AF;
    font-size: 14px;
}

.alert-info i {
    font-size: 16px;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    /* Sidebar móvil */
    .sidebar {
        position: fixed;
        left: -100%;
        width: 280px;
        height: 100vh;
        z-index: 1000;
        transition: left 0.3s ease;
    }
    
    .sidebar.active {
        left: 0;
    }
    
    /* Botón hamburguesa */
    .mobile-menu-toggle {
        display: block !important;
        position: fixed;
        top: 20px;
        left: 20px;
        z-index: 999;
        width: 44px;
        height: 44px;
        background: var(--primary);
        border: none;
        border-radius: 8px;
        color: white;
        font-size: 20px;
        cursor: pointer;
        box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    }
    
    /* Overlay cuando sidebar está abierto */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
        padding: 80px 15px 20px 15px;
        width: 100%;
    }
    
    .content-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .content-header h1 {
        font-size: 24px;
    }
    
    /* Tablas responsivas */
    .data-table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .data-table thead {
        display: none;
    }
    
    .data-table tbody,
    .data-table tr,
    .data-table td {
        display: block;
    }
    
    .data-table tr {
        margin-bottom: 20px;
        border: 1px solid var(--border);
        border-radius: 8px;
        padding: 15px;
        background: var(--surface);
    }
    
    .data-table td {
        text-align: left !important;
        padding: 8px 0;
        border: none;
        position: relative;
        padding-left: 45%;
    }
    
    .data-table td:before {
        content: attr(data-label);
        position: absolute;
        left: 0;
        width: 40%;
        font-weight: 600;
        color: var(--text-secondary);
    }
    
    /* Cards en móvil */
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    /* Modales en móvil */
    .modal-content {
        width: 95%;
        max-width: 95%;
        margin: 20px auto;
        max-height: 90vh;
        overflow-y: auto;
    }
    
    /* Formularios */
    .form-group {
        margin-bottom: 20px;
    }
    
    /* Botones en móvil */
    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }
    
    .modal-actions {
        flex-direction: column;
        gap: 10px;
    }
    
    .modal-actions button {
        width: 100%;
    }
    
    /* Login en móvil */
    .login-box {
        padding: 30px 20px;
        width: 90%;
    }
    
    /* Search bar */
    .search-bar {
        width: 100%;
    }
    
    /* Ajuste para botones de acción en tablas móviles */
    .table-actions {
        display: flex;
        gap: 8px;
        justify-content: flex-start;
    }
    
    /* Ajuste para filtros en móvil */
    .filter-group {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .filter-group select {
        width: 100%;
    }
    
    /* Checkbox group en móvil */
    .checkbox-group {
        max-height: 200px;
        overflow-y: auto;
    }
}