:root {
  --sidebar-width: 250px;
  --bg: #f1f5f9;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --text: #1e293b;
  --muted: #64748b;
  --border: #dbe2ea;
  --sidebar-bg: #1f2937;
  --sidebar-text: #d1d5db;
  --sidebar-hover: #374151;
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

html[data-theme='dark'] {
  --bg: #121212;
  --surface: #1d1f24;
  --surface-2: #23262d;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: #343942;
  --sidebar-bg: #0f1115;
  --sidebar-text: #c7ccd4;
  --sidebar-hover: #1f232b;
  --shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
}

* {
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

body {
  background: var(--bg);
  color: var(--text);
}

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

.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  padding: 1rem;
  transition: width 0.25s ease, transform 0.25s ease;
}

.sidebar.collapsed {
  width: 76px;
}

.sidebar-brand {
  font-weight: 700;
  margin-bottom: 1rem;
}

.menu-item {
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--sidebar-text);
  padding: 0.6rem;
  border-radius: 0.45rem;
  margin-bottom: 0.35rem;
}

.menu-item.active,
.menu-item:hover {
  background: var(--sidebar-hover);
  color: #fff;
}

.content-area {
  flex: 1;
  padding: 1rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding: 0.8rem;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 0.8rem;
}

.app-card {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}

.app-card .card-header {
  background: var(--surface-2);
  border-color: var(--border);
  font-weight: 600;
}

.table {
  --bs-table-bg: transparent;
  --bs-table-color: var(--text);
  --bs-table-border-color: var(--border);
  --bs-table-striped-bg: color-mix(in srgb, var(--surface-2) 88%, transparent);
  --bs-table-hover-bg: color-mix(in srgb, var(--surface-2) 72%, transparent);
}

.form-control,
.form-select,
.modal-content,
.toast,
.btn,
.settings-help {
  background-color: var(--surface);
  color: var(--text);
  border-color: var(--border);
}

.form-control::placeholder {
  color: var(--muted);
}

.login-wrapper {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #243b55, #141e30);
}

.login-card {
  width: min(92vw, 430px);
}

.shadow-soft {
  box-shadow: var(--shadow);
}

.settings-help {
  border: 1px dashed var(--border);
}

.btn:hover {
  transform: translateY(-1px);
}

.spinner-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.25);
  display: grid;
  place-items: center;
  z-index: 2000;
}

html[data-theme='dark'] .spinner-overlay {
  background: rgba(0, 0, 0, 0.45);
}

@media (max-width: 992px) {
  .sidebar {
    position: fixed;
    z-index: 1030;
    height: 100%;
  }
}