/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background: var(--sidebar-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    z-index: 999;
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 12px rgba(0, 0, 0, 0.08);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    animation: slideInLeft 0.5s ease-out;
}

.sidebar-header {
    padding: 0.3rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    position: relative;
}

.sidebar-logo-container {
    width: 50%;
    display: flex;
    justify-content: left;
    align-items: center;
    margin-bottom: 0.5rem;
}

.sidebar-logo {
    max-width: 120px;
    height: auto;
    object-fit: contain;
}

.sidebar-logo-fallback {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.sidebar-logo-fallback i {
    color: var(--primary);
    font-size: 1.75rem;
}

.sidebar-title {
    font-size: 1.25rem;
    margin: 0;
    color: var(--text);
    font-weight: 600;
    text-align: center;
    width: 100%;
}

.sidebar-close {
    display: none;
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(0, 0, 0, 0.05);
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
}

.sidebar-close:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.sidebar-close:active {
    transform: rotate(90deg) scale(0.9);
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

.nav-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1.5rem;
    background: none;
    border: none;
    color: var(--text);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: left;
    border-left: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--primary);
    transform: scaleY(0);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-item i {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
    color: #94a3b8;
    transition: all 0.3s ease;
}

.nav-item .material-icons {
    font-size: 1rem;
    width: 20px;
    height: 20px;
    line-height: 20px;
    color: #94a3b8;
    transition: all 0.3s ease;
}

.nav-item:hover {
    background: rgba(99, 102, 241, 0.08);
    transform: translateX(5px);
    padding-left: 1.75rem;
}

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

.nav-item:hover i {
    color: var(--primary);
    transform: scale(1.1);
}

.nav-item:hover .material-icons {
    color: var(--primary);
    transform: scale(1.1);
}

.nav-item.active {
    background: rgba(99, 102, 241, 0.12);
    border-left-color: var(--primary);
    color: var(--text);
    transform: translateX(5px);
}

.nav-item.active::before {
    transform: scaleY(1);
}

.nav-item.active i {
    color: var(--primary);
    transform: scale(1.1);
}

.nav-item.active .material-icons {
    color: var(--primary);
    transform: scale(1.1);
}

/* Grupos de navegación (padres) */
.nav-group {
    margin-bottom: 0.5rem;
}

.nav-group-header {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1.5rem;
    background: none;
    border: none;
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: left;
    border-left: 3px solid transparent;
    position: relative;
}

.nav-group-header:hover {
    background: rgba(99, 102, 241, 0.08);
    border-left-color: var(--primary);
}

.nav-group-header i {
    font-size: 1rem;
    width: 20px;
    height: 20px;
    text-align: center;
    color: #94a3b8;
    transition: all 0.3s ease;
}

.nav-group-header .material-icons {
    font-size: 1rem;
    width: 20px;
    height: 20px;
    line-height: 20px;
    color: #94a3b8;
    transition: all 0.3s ease;
}

.nav-group-header.active .nav-group-arrow {
    transform: rotate(180deg);
    color: var(--primary);
}

.nav-group-content {
    overflow: hidden;
    max-height: 1000px;
    transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
    opacity: 1;
}

.nav-group-content[style*="display: none"] {
    max-height: 0;
    opacity: 0;
    transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
}

.nav-group-content .nav-item {
    padding-left: 3rem;
    font-size: 0.80rem;
    position: relative;
}

.nav-group-content .nav-item::before {
    content: '';
    position: absolute;
    left: 2.5rem;
    top: 50%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #94a3b8;
    transform: translateY(-50%);
    transition: all 0.3s ease;
}

.nav-group-content .nav-item:hover::before,
.nav-group-content .nav-item.active::before {
    background: var(--primary);
    width: 8px;
    height: 8px;
}

/* Animación escalonada para items del nav */
.nav-item:nth-child(1) { animation: fadeInUp 0.4s ease-out 0.1s backwards; }
.nav-item:nth-child(2) { animation: fadeInUp 0.4s ease-out 0.2s backwards; }
.nav-item:nth-child(3) { animation: fadeInUp 0.4s ease-out 0.3s backwards; }
.nav-item:nth-child(4) { animation: fadeInUp 0.4s ease-out 0.4s backwards; }

/* Contenido principal */
.main-content {
    margin-left: 280px;
    min-height: 100vh;
    padding: 2rem;
    transition: margin-left 0.3s ease;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0;
}

h1 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 2rem;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    color: transparent;
    animation: fadeIn 1s ease;
}

.main-content h1 {
    display: none;
}

/* Botón hamburguesa para móvil */
.menu-toggle {
    display: none;
    position: fixed;
    top: 1.5rem;
    left: 1.5rem;
    z-index: 1001;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 12px;
    padding: 0.75rem 1rem;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4), 0 0 20px rgba(99, 102, 241, 0.2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInDown 0.5s ease-out 0.2s backwards, pulse 2s ease-in-out infinite;
}

.menu-toggle:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6), 0 0 30px rgba(99, 102, 241, 0.3);
}

.menu-toggle:active {
    transform: scale(0.95) rotate(-5deg);
    animation: bounce 0.3s ease;
}

/* Overlay para móvil */
.menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.menu-overlay.show {
    display: block;
}

.sidebar.show {
    transform: translateX(0);
}

/* Top navigation (fixed) */
.top-nav {
    position: fixed;
    top: 0;
    left: 280px; /* dejar espacio para el sidebar */
    right: 0;
    height: 56px;
    background: linear-gradient(90deg, rgba(255,255,255,0.95), rgba(255,255,255,0.9));
    display: flex;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    z-index: 1100;
    border-bottom: 1px solid var(--border-color);
}

.top-nav-inner {
    display: flex;
    gap: 0.5rem;
    padding: 0 1rem;
    width: 100%;
    align-items: center;
}

.top-nav-item {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.5rem 0.75rem;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    font-size: 0.9rem;
    border-radius: 8px;
    transition: background 0.15s ease, color 0.15s ease;
}

.top-nav-item i.material-icons {
    font-size: 1rem;
    color: #64748b;
}

.top-nav-item:hover {
    background: rgba(99,102,241,0.06);
    color: var(--primary);
}

/* Ajuste del contenido principal para que no quede detrás de la top-nav */
.main-content {
    padding-top: 72px; /* espacio para la barra superior */
}

/* Responsive: en pantallas pequeñas la top-nav ocupa todo el ancho y el sidebar se mantiene oculto por defecto */
@media (max-width: 900px) {
    .top-nav {
        left: 0;
        padding-left: 0.5rem;
        height: 56px;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    .menu-toggle {
        z-index: 1200;
    }

    .main-content {
        padding-top: 64px;
    }
}