/* =========================================
   DASHBOARD Y NAVBAR
========================================= */
.dashboard-nav {
    background: var(--white);
    height: 80px; 
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--space-xl);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-left { display: flex; align-items: center; gap: var(--space-xl); }
.nav-logo { font-family: var(--font-head); font-size: 1.8rem; font-weight: 800; color: var(--primary-main); }
.nav-tabs { display: flex; gap: var(--space-md); }

.tab-btn {
    background: transparent;
    border: none;
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-ui);
    font-weight: 600;
    color: var(--text-gray);
    cursor: pointer;
    border-radius: 50px;
    transition: 0.3s;
    font-size: 0.95rem;
}
.tab-btn.active { background: var(--bg-light); color: var(--primary-main); }
.tab-btn:hover { color: var(--primary-main); background: #f8faff; }

.nav-right { display: flex; align-items: center; gap: var(--space-lg); }
.user-greeting { font-family: var(--font-ui); font-size: 0.95rem; font-weight: 500; color: var(--secondary); }
.btn-logout { background: none; border: none; font-size: 1.4rem; color: var(--danger); cursor: pointer; transition: 0.2s; }
.btn-logout:hover { transform: scale(1.1); }

.main-container { max-width: 1300px; margin: var(--space-xl) auto; padding: 0 var(--space-lg); }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-xl); }
.section-header h2 { font-size: 2rem; }

/* =========================================
   ESTRUCTURA DEL AULA (SIDEBAR AZUL OSCURO)
========================================= */
#classroom-view { flex: 1; display: flex; overflow: hidden; height: calc(100vh - 80px); position: relative; }

.classroom-sidebar {
    width: 320px; 
    background: var(--secondary); /* TU COLOR OSCURO (#0c0f38) */
    border-right: 1px solid rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    position: relative;
    overflow: visible; 
}

.sidebar-hidden .classroom-sidebar { margin-left: -320px; }

/* Header del sidebar */
.sidebar-header { 
    padding: var(--space-lg); 
    border-bottom: 1px solid rgba(255,255,255,0.1); 
    background: transparent; 
}
.sidebar-header h3 { 
    font-family: var(--font-head); 
    font-size: 1.2rem; 
    color: var(--white); /* Texto blanco */
    margin-top: var(--space-sm); 
}

.btn-back { 
    background: none; border: none; color: rgba(255,255,255,0.7); 
    cursor: pointer; display: flex; align-items: center; gap: 8px; 
    font-family: var(--font-ui); font-weight: 500; font-size: 0.9rem; 
}
.btn-back:hover { color: var(--white); }

.sidebar-footer { 
    padding: var(--space-lg); 
    border-top: 1px solid rgba(255,255,255,0.1); 
    background: transparent; 
}

/* BOTÓN "NUEVO MÓDULO" DE ALTO CONTRASTE */
/* Sobrescribimos el estilo del botón dentro del footer del sidebar */
.sidebar-footer button {
    background: var(--white) !important;
    color: var(--primary-main) !important;
    border: none !important;
    font-weight: 700 !important;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}
.sidebar-footer button:hover {
    background: var(--primary-pale) !important;
    transform: translateY(-2px);
}

.classroom-content {
    flex: 1;
    padding: var(--space-xl);
    overflow-y: auto;
    position: relative;
    background: var(--bg-light);
}

/* BOTÓN BURGUER (INTEGRADO AL COLOR OSCURO) */
.toggle-sidebar-btn {
    position: absolute; 
    top: 20px; 
    right: -50px; 
    width: 50px; 
    height: 50px; 
    background: var(--secondary); /* Mismo color oscuro que el sidebar */
    border: 1px solid rgba(255,255,255,0.1);
    border-left: none; 
    border-radius: 0 10px 10px 0; 
    cursor: pointer; 
    display: flex; justify-content: center; align-items: center;
    box-shadow: 4px 2px 15px rgba(0,0,0,0.2); 
    color: var(--white);
    z-index: 1001;
    transition: 0.3s;
    font-size: 1.2rem;
}
.toggle-sidebar-btn:hover { 
    background: var(--primary-darkest); 
    width: 55px; 
    color: var(--primary-light); 
}