:root {
  --bg: #f4f5f7;
  --panel-bg: #ffffff;
  --text: #1c1f26;
  --text-muted: #5b6270;
  --border: #d9dce2;
  --accent: #2f6fed;
  --accent-text: #ffffff;
  --danger: #d64545;
  --input-bg: #ffffff;
  --table-head-bg: #eef1f6;
  --table-row-alt: #fafbfc;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --panel-bg: #1c1f26;
    --text: #e8eaed;
    --text-muted: #9aa1ac;
    --border: #333844;
    --accent: #5b8dff;
    --accent-text: #0b0e14;
    --danger: #ff6b6b;
    --input-bg: #14161a;
    --table-head-bg: #22262f;
    --table-row-alt: #191c22;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.4;
}

.app-header {
  padding: 1.5rem 1.5rem 1rem;
  max-width: 1400px;
  margin: 0 auto;
}

.header-top {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0 0 0.35rem;
}

.app-header h1 {
  margin: 0;
  font-size: 1.5rem;
}

.version-badge {
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel-bg);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.subtitle {
  margin: 0;
  color: var(--text-muted);
  max-width: 65ch;
}

/* ---------- App shell / side nav ---------- */
/* Mobile-first: nav is a genuine off-canvas drawer, closed by default,
   sliding in over a backdrop. Wide screens get an always-visible sidebar
   instead (see the min-width media query below). */

.app-shell {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

.nav-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  margin: 0 0 1rem;
  padding: 0.65rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-bg);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.nav-backdrop.open {
  display: block;
  opacity: 1;
}

.side-nav {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: min(80vw, 300px);
  padding: 1.25rem 0.75rem;
  border-right: 1px solid var(--border);
  background: var(--panel-bg);
  box-shadow: 4px 0 16px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform 0.22s ease;
}

.side-nav.open {
  transform: translateX(0);
}

.tab {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  text-align: left;
}

.tab:hover {
  background: var(--table-head-bg);
}

.tab-icon {
  flex-shrink: 0;
  width: 1.15rem;
  height: 1.15rem;
  line-height: 0;
}

.tab-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}

.tab-coming-soon {
  color: var(--text-muted);
  border-style: dashed;
}

.tab-coming-soon.active {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--text-muted);
}

.app-main {
  min-width: 0;
}

@media (min-width: 900px) {
  .app-shell {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
  }

  .nav-toggle,
  .nav-backdrop {
    display: none !important;
  }

  .side-nav {
    position: sticky;
    top: 1.5rem;
    left: auto;
    height: auto;
    width: 230px;
    flex: 0 0 230px;
    margin: 1rem 0 0;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: none;
    transform: none;
  }

  .app-main {
    flex: 1;
  }
}

main {
  padding: 1rem 0 3rem;
}

.type-description {
  color: var(--text-muted);
  margin: 0.5rem 0 1.5rem;
}

.panel {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}

.panel h2 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
}

.hint {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0.25rem 0 1rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem 1.25rem;
  align-items: start;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.field-wide {
  grid-column: 1 / -1;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.field label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.required-marker {
  color: var(--danger);
  font-weight: 700;
}

input,
textarea,
select {
  font: inherit;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text);
  width: 100%;
}

textarea {
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
}

input.invalid {
  border-color: var(--danger);
  outline-color: var(--danger);
}

button {
  font: inherit;
  padding: 0.55rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel-bg);
  color: var(--text);
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}

button.secondary {
  background: transparent;
}

button.danger-outline {
  color: var(--danger);
  border-color: var(--danger);
  background: transparent;
}

button.icon-btn.danger {
  color: var(--danger);
  border-color: var(--border);
  padding: 0.3rem 0.6rem;
  font-size: 0.8rem;
  white-space: nowrap;
}

button:hover {
  filter: brightness(1.05);
}

.table-toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.table-toolbar h2 {
  margin: 0;
}

.row-count {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.spacer {
  flex: 1;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.85rem;
}

thead th {
  background: var(--table-head-bg);
  text-align: left;
  padding: 0.5rem 0.6rem;
  white-space: nowrap;
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--border);
}

tbody tr:nth-child(even) {
  background: var(--table-row-alt);
}

tbody td {
  padding: 0.3rem 0.4rem;
  border-bottom: 1px solid var(--border);
}

tbody td input {
  min-width: 110px;
}

.empty-state {
  padding: 2rem 1rem;
  text-align: center;
  color: var(--text-muted);
}

.app-footer {
  padding: 0 0 2rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.feedback-link {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel-bg);
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
}

.feedback-link:hover {
  filter: brightness(1.05);
}

@media (max-width: 640px) {
  .table-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
}