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

:root {
    /* Colores primarios modernos */
    --primary: #1d4ed8;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --accent: #7c3aed;
    --accent-dark: #6d28d9;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    
    /* Espaciado */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Transiciones */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
    color: var(--text-dark);
    line-height: 1.6;
    min-height: 100vh;
}

/* ============================================================================
   LOGIN PAGE - DISEÑO MODERNO
   ============================================================================ */

.login-body {
    background: linear-gradient(135deg, #0f172a 0%, #1d4ed8 50%, #7c3aed 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

/* Animación de fondo */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.login-container {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.2);
    width: 100%;
    max-width: 420px;
    animation: float 6s ease-in-out infinite;
    position: relative;
    z-index: 1;
}

.login-container h1 {
    color: var(--primary);
    text-align: center;
    margin-bottom: 8px;
    font-size: 32px;
    font-weight: 700;
}

.login-container h2 {
    color: var(--text-light);
    text-align: center;
    font-size: 14px;
    margin-bottom: var(--spacing-xl);
    font-weight: 400;
}

.login-tabs {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--border);
}

.login-tab {
    flex: 1;
    padding: var(--spacing-md) 0;
    border: none;
    background: none;
    color: var(--text-light);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    position: relative;
    margin-bottom: -2px;
}

.login-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.login-tab:hover {
    color: var(--primary-light);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    transition: var(--transition);
    background: var(--white);
    color: var(--text-dark);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.1);
}

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

.boton-primario {
    width: 100%;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--white);
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.boton-primario:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(29, 78, 216, 0.3);
}

.boton-primario:active {
    transform: translateY(0);
}

.alert {
    padding: var(--spacing-md);
    border-radius: 10px;
    margin-bottom: var(--spacing-lg);
    font-size: 14px;
    animation: slide-down 0.3s ease-out;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: #991b1b;
    border-left: 4px solid var(--danger);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: #065f46;
    border-left: 4px solid var(--success);
}

.alert-info {
    background: rgba(29, 78, 216, 0.1);
    color: #1e3a8a;
    border-left: 4px solid var(--primary);
}

.test-credentials {
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid var(--success);
    padding: var(--spacing-md);
    border-radius: 10px;
    font-size: 13px;
    margin-top: var(--spacing-lg);
}

.test-credentials strong {
    color: var(--text-dark);
}

.login-footer {
    text-align: center;
    margin-top: var(--spacing-lg);
    font-size: 13px;
    color: var(--text-light);
}

.login-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

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

/* ============================================================================
   LAYOUT CON SIDEBAR
   ============================================================================ */

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 260px;
    height: 100vh;
    background: linear-gradient(180deg, var(--primary-dark) 0%, var(--accent-dark) 100%);
    color: var(--white);
    padding: var(--spacing-lg);
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 4px 0 15px rgba(15, 23, 42, 0.15);
}

.sidebar-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.sidebar-logo {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.5px;
}

.sidebar-subtitle {
    font-size: 12px;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sidebar-nav {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.sidebar-nav li {
    margin-bottom: var(--spacing-sm);
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 12px 14px;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    border-radius: 10px;
    transition: var(--transition);
    font-size: 14px;
    font-weight: 500;
    position: relative;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
}

.sidebar-nav a.active {
    background: rgba(255, 255, 255, 0.2);
    font-weight: 600;
}

.sidebar-nav a.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: #fbbf24;
    border-radius: 0 2px 2px 0;
}

.sidebar-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.icon {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-small {
    width: 16px;
    height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    vertical-align: middle;
}

.sidebar-user {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.sidebar-user-info {
    margin-bottom: var(--spacing-md);
}

.sidebar-user-name {
    font-size: 13px;
    font-weight: 600;
    opacity: 0.9;
}

.sidebar-user-role {
    font-size: 11px;
    opacity: 0.7;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.boton-logout {
    width: 100%;
    padding: 10px 12px;
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: var(--spacing-sm);
}

.boton-logout:hover {
    background: rgba(239, 68, 68, 0.25);
    color: var(--white);
}

/* ============================================================================
   MAIN CONTENT AREA
   ============================================================================ */

main {
    margin-left: 260px;
    padding: var(--spacing-xl);
    min-height: 100vh;
}

.header {
    background: var(--white);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: 15px;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
    margin-bottom: var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
}

.header-subtitle {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 4px;
}

/* ============================================================================
   CARDS Y ESTADÍSTICAS
   ============================================================================ */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: 15px;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
    transition: var(--transition);
    border-top: 4px solid var(--primary);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.12);
}

.stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 13px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

/* ============================================================================
   FORMULARIOS
   ============================================================================ */

.formulario-seccion {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: 15px;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
    margin-bottom: var(--spacing-xl);
}

.formulario-seccion h2,
.formulario-seccion h3 {
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
    font-size: 18px;
    font-weight: 700;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

/* ==========================================================================
   PANELES POR SECCIONES
   ========================================================================== */

.admin-section-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: var(--spacing-xl);
}

.admin-section-nav a {
    display: inline-flex;
    align-items: center;
    padding: 10px 14px;
    border-radius: 999px;
    background: var(--white);
    color: var(--text-dark);
    text-decoration: none;
    border: 1px solid var(--border);
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.05);
}

.admin-section-card {
    scroll-margin-top: 24px;
}

.admin-stats-grid {
    margin-bottom: 0;
}

.table-wrap {
    overflow-x: auto;
}

.inline-form {
    display: inline-block;
}

.admin-quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tabla-admin select {
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--white);
}

/* ============================================================================
   TABLAS
   ============================================================================ */

.tabla-contenedor {
    background: var(--white);
    border-radius: 15px;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--light-bg);
    border-bottom: 2px solid var(--border);
}

th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

tbody tr:hover {
    background: var(--light-bg);
}

/* ============================================================================
   BOTONES
   ============================================================================ */

.boton-secundario,
.boton-exito,
.boton-peligro,
.boton-advertencia {
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.boton-secundario {
    background: var(--light-bg);
    color: var(--text-dark);
    border: 1px solid var(--border);
}

.boton-secundario:hover {
    background: var(--border);
}

.boton-exito {
    background: rgba(16, 185, 129, 0.15);
    color: #065f46;
    border: 1px solid var(--success);
}

.boton-exito:hover {
    background: rgba(16, 185, 129, 0.25);
}

.boton-peligro {
    background: rgba(239, 68, 68, 0.15);
    color: #991b1b;
    border: 1px solid var(--danger);
}

.boton-peligro:hover {
    background: rgba(239, 68, 68, 0.25);
}

.boton-advertencia {
    background: rgba(245, 158, 11, 0.15);
    color: #92400e;
    border: 1px solid var(--warning);
}

.boton-advertencia:hover {
    background: rgba(245, 158, 11, 0.25);
}

/* ============================================================================
   BADGES Y ETIQUETAS
   ============================================================================ */

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: #065f46;
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: #92400e;
}

.badge-danger {
    background: rgba(239, 68, 68, 0.15);
    color: #991b1b;
    animation: parpadeo 1.5s infinite;
}

@keyframes parpadeo {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ============================================================================
   ANIMACIONES
   ============================================================================ */

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

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

@keyframes fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        padding: var(--spacing-md);
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: var(--spacing-lg);
        position: relative;
    }

    main {
        margin-left: 0;
        padding: var(--spacing-md);
    }

    .header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .login-container {
        padding: var(--spacing-lg);
    }

    .login-container h1 {
        font-size: 24px;
    }

    .header-title {
        font-size: 20px;
    }

    .stat-value {
        font-size: 28px;
    }
}