/* ─── App shell ─────────────────────────────────────────── */
.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ─── Sidebar ────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg-1);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 20;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--s3);
  padding: var(--s5) var(--s5);
  border-bottom: 1px solid var(--border);
}

.logo-icon {
  width: 28px;
  height: 28px;
  background: var(--accent);
  border-radius: var(--r1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

.logo-text {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -0.3px;
}

.sidebar-nav {
  flex: 1;
  padding: var(--s3) var(--s2);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--s3);
  padding: 8px var(--s3);
  border-radius: var(--r1);
  color: var(--text-3);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.12s;
  cursor: pointer;
}

.nav-item:hover { color: var(--text-2); background: var(--card); }
.nav-item.active { color: var(--text-1); background: var(--card); }
.nav-item.active .nav-icon svg { color: var(--accent); }

.nav-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-icon svg { width: 16px; height: 16px; }

.nav-section {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  padding: var(--s4) var(--s3) var(--s2);
}

.sidebar-footer {
  padding: var(--s4) var(--s5);
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-3);
}

/* ─── Main content ───────────────────────────────────────── */
.main-content {
  flex: 1;
  overflow-y: auto;
  background: var(--bg);
  min-width: 0;
}

.page {
  padding: var(--s6);
  max-width: 1440px;
  margin: 0 auto;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--s6);
  gap: var(--s4);
}

.page-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -0.3px;
}

.page-sub {
  font-size: 13px;
  color: var(--text-3);
  margin-top: 2px;
}

/* ─── Grid helpers ───────────────────────────────────────── */
.grid-2   { display: grid; grid-template-columns: repeat(2, 1fr);   gap: var(--s4); }
.grid-3   { display: grid; grid-template-columns: repeat(3, 1fr);   gap: var(--s4); }
.grid-4   { display: grid; grid-template-columns: repeat(4, 1fr);   gap: var(--s4); }
.grid-2-1 { display: grid; grid-template-columns: 2fr 1fr;          gap: var(--s4); }
.grid-3-2 { display: grid; grid-template-columns: 3fr 2fr;          gap: var(--s4); }
.grid-5-4 { display: grid; grid-template-columns: 5fr 4fr;          gap: var(--s4); }

.stack    { display: flex; flex-direction: column; gap: var(--s4); }
.hstack   { display: flex; align-items: center;   gap: var(--s3); }
.spacer   { flex: 1; }

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .sidebar { width: 60px; }
  .logo-text, .nav-label, .nav-section, .sidebar-footer { display: none; }
  .sidebar-logo { justify-content: center; }
  .nav-item { justify-content: center; padding: 10px; }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4, .grid-2-1, .grid-3-2, .grid-5-4 {
    grid-template-columns: 1fr;
  }
  .page { padding: var(--s4); }
}