/* ============================================================
   NextGen Professional Associates — Dashboard Styles
   Applies to: student.html, teacher.html, admin.html
   ============================================================ */

.dash-layout {
  display: flex;
  min-height: 100vh;
  background: var(--bg);
}

/* ─── Sidebar ─────────────────────────────────────────────── */
.dash-sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 500;
  overflow-y: auto;
  transition: transform var(--t-base);
}
.dash-sidebar::-webkit-scrollbar { width: 4px; }
.dash-sidebar::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 2px; }

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  flex-shrink: 0;
}
.sidebar-logo-mark {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--sky-deep), var(--sky));
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-family: var(--font-display);
  font-size: 14px; color: #fff; flex-shrink: 0;
}
.sidebar-brand-name {
  font-family: var(--font-display);
  font-size: 13px; font-weight: 700;
  color: var(--text); line-height: 1.2;
}
.sidebar-brand-role {
  font-size: 10px; color: var(--sky);
  text-transform: uppercase; letter-spacing: 0.08em;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-avatar {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--sky-deep), var(--sky));
  border-radius: var(--r-full);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px; color: #fff;
  flex-shrink: 0;
}
.sidebar-user-name { font-size: 14px; font-weight: 600; color: var(--text); line-height: 1.2; }
.sidebar-user-email { font-size: 12px; color: var(--text-3); }

.sidebar-nav {
  flex: 1;
  padding: var(--space-5) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.sidebar-section-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  padding: var(--space-4) var(--space-3) var(--space-2);
}
.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  text-decoration: none;
  transition: all var(--t-fast);
  position: relative;
}
.sidebar-link .sl-icon { font-size: 17px; flex-shrink: 0; width: 20px; text-align: center; }
.sidebar-link .sl-label { flex: 1; }
.sidebar-link .sl-badge {
  font-size: 10px; font-weight: 700;
  background: var(--sky-deep); color: #fff;
  padding: 2px 7px; border-radius: var(--r-full);
}
.sidebar-link:hover {
  background: var(--surface-2);
  color: var(--text);
}
.sidebar-link.active {
  background: var(--sky-dim);
  color: var(--sky);
  border: 1px solid var(--sky-border);
}
.sidebar-link.active .sl-icon { color: var(--sky); }

.sidebar-footer {
  padding: var(--space-5) var(--space-3);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* Mobile sidebar toggle */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 499;
}
.sidebar-backdrop.active { display: block; }

/* ─── Main area ───────────────────────────────────────────── */
.dash-main {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Topbar */
.dash-topbar {
  position: sticky;
  top: 0;
  z-index: 400;
  background: rgba(7,8,15,0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 var(--space-8);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}
.dash-topbar-left { display: flex; align-items: center; gap: var(--space-4); }
.sidebar-toggle-btn {
  display: none;
  width: 36px; height: 36px;
  align-items: center; justify-content: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-2);
  font-size: 18px;
}
.dash-page-title { font-size: 16px; font-weight: 700; font-family: var(--font-display); color: var(--text); }
.dash-topbar-right { display: flex; align-items: center; gap: var(--space-3); }

/* Content */
.dash-content {
  flex: 1;
  padding: var(--space-8);
}

/* ─── Stat cards ──────────────────────────────────────────── */
.stat-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--sky-deep), var(--sky));
  opacity: 0;
  transition: opacity var(--t-base);
}
.stat-card:hover::before { opacity: 1; }
.stat-card:hover {
  border-color: var(--sky-border);
  box-shadow: var(--shadow-sky);
}
.stat-card-icon {
  width: 40px; height: 40px;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.stat-card-icon.blue   { background: var(--sky-dim); color: var(--sky); }
.stat-card-icon.green  { background: rgba(52,211,153,0.1); color: var(--success); }
.stat-card-icon.purple { background: rgba(167,139,250,0.1); color: var(--purple); }
.stat-card-icon.amber  { background: rgba(251,191,36,0.1); color: var(--warning); }
.stat-card-num {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
}
.stat-card-label { font-size: 13px; color: var(--text-2); }
.stat-card-trend {
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.trend-up   { color: var(--success); }
.trend-down { color: var(--danger); }

/* ─── Course list in dashboard ───────────────────────────── */
.dash-course-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  border-bottom: 1px solid var(--border);
  transition: background var(--t-fast);
  cursor: pointer;
}
.dash-course-item:last-child { border-bottom: none; }
.dash-course-item:hover { background: var(--surface-2); }

.dash-course-thumb {
  width: 64px; height: 48px;
  border-radius: var(--r-sm);
  object-fit: cover;
  background: var(--surface-3);
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}
.dash-course-info { flex: 1; min-width: 0; }
.dash-course-title {
  font-size: 14px; font-weight: 600;
  color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.dash-course-sub { font-size: 12px; color: var(--text-3); margin-top: 2px; }
.dash-course-meta { display: flex; align-items: center; gap: var(--space-4); flex-shrink: 0; }

/* ─── Course builder (teacher) ───────────────────────────── */
.course-builder-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
}
.builder-tabs-bar {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
  overflow-x: auto;
}
.builder-tab {
  padding: var(--space-4) var(--space-6);
  font-size: 13px; font-weight: 600;
  color: var(--text-2);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: all var(--t-fast);
  background: none;
}
.builder-tab:hover { color: var(--text); background: var(--surface); }
.builder-tab.active {
  color: var(--sky);
  border-bottom-color: var(--sky);
  background: var(--surface);
}
.builder-step { display: none; padding: var(--space-8); }
.builder-step.active { display: block; }

/* Curriculum tree */
.curriculum-tree { display: flex; flex-direction: column; gap: var(--space-3); }
.section-node {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
}
.section-node-header {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
}
.section-node-handle { color: var(--text-3); cursor: grab; font-size: 16px; }
.section-node-title { flex: 1; font-size: 14px; font-weight: 600; color: var(--text); }
.section-node-actions { display: flex; gap: var(--space-2); }

.topic-list { padding: var(--space-2) var(--space-5) var(--space-4) var(--space-12); display: flex; flex-direction: column; gap: var(--space-2); }
.topic-node {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
}
.topic-node-title { flex: 1; font-size: 13px; color: var(--text-2); }
.topic-node-actions { display: flex; gap: var(--space-2); }

/* Content editor inside topic */
.content-editor {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  margin-top: var(--space-5);
}
.content-editor-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  padding: 4px 4px 0;
  background: var(--surface);
}
.content-editor-tab {
  padding: var(--space-3) var(--space-5);
  font-size: 13px; font-weight: 600;
  color: var(--text-2);
  border-radius: var(--r-sm) var(--r-sm) 0 0;
  border: 1px solid transparent;
  border-bottom: none;
  background: none;
  transition: all var(--t-fast);
}
.content-editor-tab.active {
  background: var(--surface-2);
  color: var(--sky);
  border-color: var(--border);
  border-bottom-color: var(--surface-2);
  margin-bottom: -1px;
}
.content-editor-body { padding: var(--space-6); }

/* Video/material entry */
.media-entry {
  display: flex; align-items: flex-start; gap: var(--space-4);
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  margin-bottom: var(--space-3);
}
.media-entry-fields { flex: 1; display: flex; flex-direction: column; gap: var(--space-3); }
.media-entry-icon { font-size: 20px; margin-top: 8px; flex-shrink: 0; }

/* Students table */
.student-row-whatsapp { color: var(--success); font-size: 13px; }

/* ─── Filters bar ─────────────────────────────────────────── */
.filters-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}
.filter-chip {
  padding: 6px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  font-size: 13px;
  color: var(--text-2);
  cursor: pointer;
  transition: all var(--t-fast);
}
.filter-chip:hover, .filter-chip.active {
  background: var(--sky-dim);
  border-color: var(--sky-border);
  color: var(--sky);
}

/* ─── Upload area ─────────────────────────────────────────── */
.upload-area {
  border: 2px dashed var(--border-2);
  border-radius: var(--r-lg);
  padding: var(--space-10);
  text-align: center;
  cursor: pointer;
  transition: all var(--t-base);
}
.upload-area:hover, .upload-area.drag-over {
  border-color: var(--sky-border);
  background: var(--sky-dim);
}
.upload-icon { font-size: 36px; margin-bottom: var(--space-3); color: var(--text-3); }
.upload-text { font-size: 14px; color: var(--text-2); }
.upload-subtext { font-size: 12px; color: var(--text-3); margin-top: var(--space-2); }

/* ─── Notification dot ───────────────────────────────────── */
.notif-dot {
  width: 8px; height: 8px;
  background: var(--sky);
  border-radius: 50%;
  position: absolute;
  top: 6px; right: 6px;
  border: 2px solid var(--surface);
}

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .stat-cards-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .dash-sidebar {
    transform: translateX(-100%);
  }
  .dash-sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 40px rgba(0,0,0,0.5);
  }
  .dash-main { margin-left: 0; }
  .sidebar-toggle-btn { display: flex; }
  .dash-content { padding: var(--space-5); }
  .stat-cards-grid { grid-template-columns: 1fr 1fr; }
  .dash-topbar { padding: 0 var(--space-5); }
  .builder-step { padding: var(--space-5); }
}
@media (max-width: 480px) {
  .stat-cards-grid { grid-template-columns: 1fr; }
  .dash-content { padding: var(--space-4); }
}