:root {
  color-scheme: light;
  --bg: #f4f7fa;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --text: #122033;
  --muted: #617188;
  --line: #d8e1ec;
  --accent: #0f6b63;
  --accent-dark: #0a4f49;
  --danger: #b42318;
  --focus: #8b6f21;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Arial, sans-serif;
  line-height: 1.5;
}

button,
input,
select,
textarea {
  font: inherit;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.skip-link:focus {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 0.9rem;
}

.skip-link:focus {
  top: 1rem;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  padding: 1.25rem clamp(1rem, 3vw, 2.5rem);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.eyebrow {
  margin: 0 0 0.2rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

h2 {
  margin-bottom: 0;
  font-size: 1.25rem;
}

h3 {
  margin-bottom: 0.85rem;
  font-size: 1rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.session-status,
.role-badge {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.55rem 0.75rem;
  color: var(--muted);
  background: #f9fbfd;
  font-size: 0.92rem;
}

.role-badge {
  color: var(--accent-dark);
  font-weight: 700;
  text-transform: capitalize;
}

.app-shell {
  width: min(1280px, calc(100% - 2rem));
  margin: 1.25rem auto;
}

.auth-panel,
.sidebar,
.workspace,
.form-surface,
.data-surface {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.auth-panel {
  width: min(430px, 100%);
  margin: clamp(2rem, 8vh, 4.5rem) auto;
  padding: 1.35rem;
}

.form-stack,
.form-surface {
  display: grid;
  gap: 0.85rem;
}

.form-surface,
.data-surface,
.workspace {
  padding: 1rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

label span {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 0.32rem;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.62rem 0.72rem;
  color: var(--text);
  background: #fff;
}

textarea {
  resize: vertical;
}

.primary-button,
.secondary-button,
.nav-item,
.table-button,
.metric-tile {
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 700;
}

.primary-button {
  background: var(--accent);
  color: #fff;
  padding: 0.72rem 0.9rem;
}

.primary-button:hover {
  background: var(--accent-dark);
}

.secondary-button,
.table-button {
  background: #fff;
  border-color: var(--line);
  color: var(--text);
}

.secondary-button {
  padding: 0.52rem 0.75rem;
}

.table-button {
  padding: 0.4rem 0.55rem;
  white-space: nowrap;
}

.form-message,
.flash-message {
  min-height: 1.4rem;
  margin-bottom: 0;
  color: var(--muted);
}

.form-message.error,
.flash-message.error {
  color: var(--danger);
}

.flash-message {
  margin: 1rem 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.65rem 0.75rem;
  background: var(--surface-soft);
}

.app-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 1rem;
}

.sidebar {
  display: grid;
  align-content: start;
  gap: 0.4rem;
  padding: 0.75rem;
}

.nav-item {
  width: 100%;
  background: transparent;
  color: var(--text);
  padding: 0.65rem 0.7rem;
  text-align: left;
}

.nav-item.active {
  background: #e8f3f1;
  color: var(--accent-dark);
}

.workspace-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
  margin-bottom: 1rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.metric-tile {
  display: grid;
  gap: 0.25rem;
  min-height: 90px;
  padding: 0.85rem;
  background: var(--surface-soft);
  border-color: var(--line);
  color: var(--text);
  text-align: left;
}

.metric-tile span {
  color: var(--muted);
  font-size: 0.88rem;
}

.metric-tile strong {
  font-size: 1.45rem;
}

.metric-tile.static {
  cursor: default;
}

.split-layout {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 1rem;
}

.split-layout.wide-form {
  grid-template-columns: minmax(360px, 440px) minmax(0, 1fr);
}

.toolbar {
  margin-bottom: 1rem;
}

.toolbar label {
  display: block;
  width: min(520px, 100%);
}

table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
}

th,
td {
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.86rem;
}

tr:last-child td {
  border-bottom: 0;
}

.selected-row td {
  background: #edf8f6;
}

.table-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.empty-state {
  margin-bottom: 0;
  color: var(--muted);
}

@media (max-width: 900px) {
  .app-header,
  .header-actions,
  .app-layout,
  .workspace-header,
  .metrics-grid,
  .split-layout,
  .split-layout.wide-form,
  .form-grid {
    display: block;
  }

  .header-actions,
  .session-status,
  .sidebar,
  .workspace,
  .data-surface,
  .role-badge {
    margin-top: 0.75rem;
  }

  .form-surface {
    margin-bottom: 1rem;
  }

  .auth-panel {
    margin-top: 1rem;
  }
}