/* ═══════════════════════════════════════════════════════
   STUDENT PORTAL — topnav.css
   Top navigation bar, main wrap, profile popup.
   ═══════════════════════════════════════════════════════ */

/* ── MAIN WRAP ── */
.main-wrap {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── TOP NAV ── */
.topnav {
  height: var(--topnav-h);
  background: var(--topnav-bg);
  border-bottom: 1px solid var(--topnav-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.topnav-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.sidebar-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: background 0.15s, color 0.15s;
}

.sidebar-toggle:hover {
  background: var(--bg-page);
  color: var(--text-main);
}

/* ── Search in topnav ── */
.topnav-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.topnav-search-icon {
  position: absolute;
  left: 10px;
  color: var(--text-muted);
  pointer-events: none;
}

.topnav-search {
  padding: 8px 14px 8px 34px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.875rem;
  color: var(--text-main);
  background: var(--bg-page);
  outline: none;
  width: 260px;
  transition: border-color 0.2s, box-shadow 0.2s, width 0.25s;
}

.topnav-search::placeholder {
  color: var(--text-muted);
}

.topnav-search:focus {
  border-color: var(--accent-light);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
  width: 320px;
}

/* ── Right side ── */
.topnav-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.topnav-icon-btn {
  position: relative;
  background: var(--bg-page);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-sub);
  transition: background 0.15s, color 0.15s;
}

.topnav-icon-btn:hover {
  background: #f1f5f9;
  color: var(--text-main);
}

.notif-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--red);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--topnav-bg);
}

.notif-badge.hidden {
  display: none;
}

/* ── Student info in topnav ── */
.topnav-student {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topnav-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green) 0%, var(--sky) 100%);
  color: #fff;
  font-family: 'Sora', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.topnav-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
}

.topnav-logout-btn {
  padding: 8px 16px;
  background: #f0fdf4;
  color: var(--green);
  border: none;
  border-radius: var(--radius-sm);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.825rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.18s, color 0.18s;
}

.topnav-logout-btn:hover {
  background: var(--green);
  color: #fff;
}

/* ── HEADER PROFILE POPUP ── */
.header-profile-popup {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: 280px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 1000;
  cursor: default;
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  transform-origin: top right;
  text-align: center;
}

.header-profile-popup.hidden {
  opacity: 0;
  transform: scale(0.95);
  visibility: hidden;
  pointer-events: none;
}

.popup-avatar-large {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green) 0%, var(--sky) 100%);
  color: #fff;
  font-family: 'Sora', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.popup-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
}

.popup-name-large {
  font-family: 'Sora', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.popup-email {
  font-size: 0.85rem;
  color: var(--text-sub);
}

.popup-course {
  margin-top: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--accent-soft);
  color: var(--accent-dark);
  padding: 4px 10px;
  border-radius: 20px;
  display: inline-block;
  align-self: center;
}