/* ═══════════════════════════════════════════════════════════════════
   LAYOUTS — Page Layouts, Sidebar, Mobile Nav, Responsive
   ═══════════════════════════════════════════════════════════════════ */

/* ── Sidebar (Desktop) ───────────────────────────────────────────── */
.sidebar {
  position: fixed;
  inset-block-start: 0;
  inset-inline-start: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--surface);
  border-inline-end: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 1.25rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  border-block-end: 1px solid var(--border);
}

.sidebar-logo svg { color: var(--accent); flex-shrink: 0; }

.sidebar-nav {
  flex: 1;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-size: 0.875rem;
  font-weight: 450;
  transition: all var(--transition);
  min-height: 40px;
  text-decoration: none;
}

.nav-item:hover { background: var(--surface-2); color: var(--text); }

.nav-item.active {
  background: var(--accent-glow);
  color: var(--accent);
}

.nav-item.active svg { stroke: var(--accent); }

.nav-divider {
  height: 1px;
  background: var(--border);
  margin: 0.5rem 0;
}

.nav-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.5rem 0.875rem 0.25rem;
}

.sidebar-footer {
  padding: 0.75rem;
  border-block-start: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.sidebar-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.25rem 0.5rem;
}

.sidebar-brand-link {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-3);
  text-align: center;
  padding: 0.35rem;
  display: block;
  text-decoration: none;
  letter-spacing: 0.08em;
  transition: color var(--transition);
}

.sidebar-brand-link:hover {
  color: var(--accent);
}

.nav-item-profile { font-weight: 500; }
.nav-item-logout  { color: var(--text-3); }
.nav-item-logout:hover { color: var(--red); background: var(--red-bg); }

.lang-switcher {
  display: flex;
  gap: 0.25rem;
}

.lang-btn {
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-xs);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-3);
  text-decoration: none;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  cursor: pointer;
  transition: all var(--transition);
}

.lang-btn:hover { color: var(--text); background: var(--surface-2); }
.lang-btn.active { color: var(--accent); background: var(--accent-glow); }

/* ── Mobile Nav (Bottom) ─────────────────────────────────────────── */
.mobile-nav {
  display: none;
  position: fixed;
  inset-block-end: 0;
  inset-inline: 0;
  height: var(--mobile-nav-h);
  background: var(--surface);
  border-block-start: 1px solid var(--border);
  z-index: 100;
  padding: 0 0.5rem;
  align-items: center;
  justify-content: space-around;
}

/* ── Mobile Top Bar (Header) ─────────────────────────────────────── */
.mobile-top-bar {
  display: none;
  position: sticky;
  top: 0;
  z-index: 95;
  background: var(--surface);
  border-block-end: 1px solid var(--border);
  padding: 0.625rem 1rem;
  align-items: center;
  justify-content: space-between;
}

.mobile-top-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.125rem;
  padding: 0.375rem 0.75rem;
  color: var(--text-3);
  font-size: 0.625rem;
  font-weight: 500;
  text-decoration: none;
  min-width: 44px;
  min-height: 44px;
  justify-content: center;
  transition: color var(--transition);
}

.mobile-nav-item.active { color: var(--accent); }
.mobile-nav-item:hover  { color: var(--text); }

.mobile-add-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px var(--accent-glow);
}

.mobile-add-btn svg { stroke: #fff; }

.mobile-nav-add { color: var(--accent) !important; }

/* ── Main Content ────────────────────────────────────────────────── */
.main-content {
  margin-inline-start: var(--sidebar-w);
  padding: 2rem;
  min-height: 100vh;
}

.main-content--full {
  margin-inline-start: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* ── Page Header ─────────────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-block-end: 1.5rem;
}

.page-title { font-size: 1.5rem; font-weight: 700; }

/* ── Grid Layouts ────────────────────────────────────────────────── */
.grid { display: grid; gap: 1rem; }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--4 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* ── Filter Bar ──────────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: end;
  margin-block-end: 1.5rem;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.filter-bar .form-group { margin-block-end: 0; min-width: 120px; flex: 1; }

/* ── Auth Layout ─────────────────────────────────────────────────── */
.auth-container {
  width: 100%;
  max-width: 420px;
  padding: 2rem;
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}

.auth-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-block-end: 2rem;
  font-size: 1.5rem;
  font-weight: 700;
}

.auth-logo svg { color: var(--accent); }

.auth-footer {
  text-align: center;
  margin-block-start: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-2);
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .mobile-top-bar { display: flex; }
  .mobile-nav { display: flex; }

  .main-content {
    margin-inline-start: 0;
    padding: 1rem;
    padding-block-end: calc(var(--mobile-nav-h) + 1rem);
  }

  .page-header { flex-direction: column; align-items: stretch; }

  .table-wrap { margin-inline: -1rem; }
  .table th, .table td { padding: 0.625rem 0.75rem; font-size: 0.8125rem; }

  .filter-bar { flex-direction: column; }
  .filter-bar .form-group { min-width: 100%; }

  /* Show card view on mobile for expense lists */
  .desktop-only { display: none !important; }
}

@media (min-width: 769px) {
  .mobile-only { display: none !important; }
}

/* ── Utility ─────────────────────────────────────────────────────── */
.mt-1 { margin-block-start: 0.5rem; }
.mt-2 { margin-block-start: 1rem; }
.mt-3 { margin-block-start: 1.5rem; }
.mb-1 { margin-block-end: 0.5rem; }
.mb-2 { margin-block-end: 1rem; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.text-center { text-align: center; }
.text-end { text-align: end; }
.w-full { width: 100%; }
.hidden { display: none !important; }