/* ============================================================
   SMS Mockups — App Shell Layout (sidebar + topbar + content)
   The sidebar/topbar markup is injected by assets/js/shell.js
   ============================================================ */

.app { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */
.sidebar {
  width: var(--sidebar-width); flex-shrink: 0;
  background: var(--sidebar-bg); color: var(--sidebar-text);
  display: flex; flex-direction: column;
  position: fixed; top: 0; bottom: 0; left: 0; z-index: 50;
  overflow-y: auto;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-thumb { background: #334155; }

.sidebar .brand {
  display: flex; align-items: center; gap: 10px;
  padding: 16px 18px; border-bottom: 1px solid #1e293b;
}
.sidebar .brand .logo {
  width: 34px; height: 34px; border-radius: 8px; flex-shrink: 0;
  background: var(--primary); color: #fff; font-weight: 700;
  display: flex; align-items: center; justify-content: center; font-size: .95rem;
}
.sidebar .brand .name { color: #fff; font-weight: 600; font-size: .9rem; line-height: 1.2; }
.sidebar .brand .sub { font-size: .68rem; color: var(--sidebar-text); }

.sidebar .nav-section { padding: 14px 12px 4px; }
.sidebar .nav-section-title {
  font-size: .66rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .08em; color: #475569; padding: 0 8px 6px;
}
.sidebar .nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 7px 10px; border-radius: 7px; margin-bottom: 1px;
  color: var(--sidebar-text); font-size: .84rem; font-weight: 500;
  text-decoration: none;
}
.sidebar .nav-item:hover { background: var(--sidebar-active-bg); color: #e2e8f0; text-decoration: none; }
.sidebar .nav-item.active { background: var(--sidebar-active-bg); color: var(--sidebar-text-active); }
.sidebar .nav-item.active .ni-icon { opacity: 1; }
.sidebar .nav-item .ni-icon { width: 18px; text-align: center; opacity: .8; font-size: .9rem; }
.sidebar .sidebar-footer { margin-top: auto; padding: 14px 18px; border-top: 1px solid #1e293b; font-size: .7rem; color: #475569; }

/* ---------- Main column ---------- */
.main { flex: 1; margin-left: var(--sidebar-width); display: flex; flex-direction: column; min-width: 0; }

/* ---------- Topbar ---------- */
.topbar {
  height: 58px; background: var(--surface); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 16px; padding: 0 24px;
  position: sticky; top: 0; z-index: 40;
}
.topbar .module-title { font-weight: 600; font-size: .95rem; }
.topbar .spacer { flex: 1; }
.topbar .topbar-search {
  width: 260px; padding: 7px 12px 7px 32px; font-size: .82rem;
  border: 1px solid var(--border); border-radius: var(--radius-full);
  background: var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='none' stroke='%2394a3b8' stroke-width='2' viewBox='0 0 24 24'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.3-4.3'/%3E%3C/svg%3E") no-repeat 11px center;
  outline: none; font-family: var(--font);
}
.topbar .icon-btn {
  position: relative; width: 36px; height: 36px; border-radius: 50%;
  border: none; background: none; cursor: pointer; font-size: 1.05rem;
  display: flex; align-items: center; justify-content: center; color: var(--text-2);
}
.topbar .icon-btn:hover { background: var(--bg); }
.topbar .icon-btn .notif-dot {
  position: absolute; top: 6px; right: 7px; width: 8px; height: 8px;
  background: var(--danger); border-radius: 50%; border: 2px solid var(--surface);
}
.topbar .user-chip { display: flex; align-items: center; gap: 9px; cursor: pointer; padding: 4px 6px; border-radius: var(--radius); }
.topbar .user-chip:hover { background: var(--bg); }
.topbar .user-chip .u-name { font-size: .82rem; font-weight: 600; line-height: 1.15; }
.topbar .user-chip .u-role { font-size: .7rem; color: var(--text-3); }

/* ---------- Module tab strip (pages within a module) ---------- */
.module-tabs {
  display: flex; gap: 2px; padding: 0 24px; background: var(--surface);
  border-bottom: 1px solid var(--border); overflow-x: auto;
}
.module-tabs a {
  padding: 10px 14px; font-size: .83rem; font-weight: 500; color: var(--text-2);
  border-bottom: 2px solid transparent; white-space: nowrap; text-decoration: none;
}
.module-tabs a:hover { color: var(--text); text-decoration: none; }
.module-tabs a.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

/* ---------- Content ---------- */
.content { padding: 24px; max-width: 1320px; width: 100%; }

/* ---------- Public page (no shell, e.g. online admission form) ---------- */
.public-wrap { min-height: 100vh; background: var(--bg); padding: 40px 16px; }
.public-card { max-width: 720px; margin: 0 auto; }

@media (max-width: 900px) {
  .sidebar { display: none; }
  .main { margin-left: 0; }
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}