:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #17202a;
  --muted: #667085;
  --line: #d8dee7;
  --primary: #126b5a;
  --primary-dark: #0d4c40;
  --danger-bg: #fff1f0;
  --danger-text: #a8071a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, "Noto Sans Thai", sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  align-items: center;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 24px;
  min-height: 64px;
  padding: 0 24px;
}

.brand,
.brand-login {
  align-items: center;
  display: flex;
  gap: 12px;
}

.brand-mark {
  align-items: center;
  background: var(--primary);
  border-radius: 6px;
  color: #ffffff;
  display: inline-flex;
  font-weight: 700;
  height: 36px;
  justify-content: center;
  width: 36px;
}

.brand-name {
  font-weight: 700;
}

.main-nav {
  display: flex;
  gap: 16px;
}

.main-nav a {
  color: var(--muted);
  font-size: 14px;
}

.user-chip {
  align-items: center;
  display: flex;
  gap: 12px;
  margin-left: auto;
}

.user-chip span {
  color: var(--muted);
  font-size: 13px;
}

.user-chip button {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  padding: 8px 10px;
}

.page-shell {
  margin: 0 auto;
  max-width: 1120px;
  padding: 28px 20px;
}

.auth-shell {
  align-items: center;
  display: flex;
  min-height: 100vh;
  justify-content: center;
  padding: 24px;
}

.login-panel,
.content-panel,
.metric-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.login-panel {
  max-width: 420px;
  padding: 28px;
  width: 100%;
}

.brand-login {
  align-items: flex-start;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.brand-login h1 {
  margin: 0;
}

.brand-login p,
.empty-state,
.eyebrow,
.dev-note {
  color: var(--muted);
}

.dev-note {
  font-size: 13px;
  margin: 0;
}

.login-form,
.form-grid {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 6px;
}

label span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

input,
select,
textarea {
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
  padding: 10px 12px;
  width: 100%;
}

.btn {
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  justify-content: center;
  min-height: 40px;
  padding: 8px 14px;
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

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

.btn-ghost {
  background: transparent;
}

.page-heading {
  align-items: center;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.page-heading h1,
.content-panel h2 {
  margin: 0;
}

.eyebrow {
  font-size: 12px;
  font-weight: 700;
  margin: 0 0 4px;
  text-transform: uppercase;
}

.metric-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 20px;
}

.metric-card,
.content-panel {
  padding: 20px;
}

.metric-value {
  display: block;
  font-size: 32px;
  font-weight: 700;
}

.metric-label {
  color: var(--muted);
  font-size: 14px;
}

.toolbar {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr 220px auto;
  margin-bottom: 16px;
}

.data-table {
  border-collapse: collapse;
  width: 100%;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--line);
  padding: 10px;
  text-align: left;
}

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

.compact-grid {
  margin-top: 10px;
}

.fieldset {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.fieldset legend {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  padding: 0 6px;
}

.detail-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
}

.detail-grid div {
  display: grid;
  gap: 4px;
}

.detail-grid dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.detail-grid dd {
  margin: 0;
}

.stack-panel {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.stack-panel h2 {
  font-size: 18px;
  margin-top: 10px;
}

.preserve-lines {
  margin: 0;
  white-space: pre-wrap;
}

.link {
  color: var(--primary);
  font-weight: 700;
}

.table-note {
  color: var(--muted);
  display: block;
  font-size: 12px;
  margin-top: 4px;
  max-width: 360px;
}

.inline-form {
  display: flex;
  gap: 8px;
}

.inline-form select {
  min-width: 150px;
}

.full-width {
  grid-column: 1 / -1;
}

.form-actions {
  display: flex;
  gap: 10px;
}

.flash {
  border-radius: 6px;
  margin: 0 0 16px;
  padding: 10px 12px;
}

.flash-error {
  background: var(--danger-bg);
  color: var(--danger-text);
}

.flash-info {
  background: #e8f6f3;
  color: var(--primary-dark);
}

@media (max-width: 760px) {
  .topbar,
  .page-heading,
  .user-chip {
    align-items: flex-start;
    flex-direction: column;
  }

  .main-nav {
    flex-wrap: wrap;
  }

  .user-chip {
    margin-left: 0;
  }

  .metric-grid,
  .toolbar,
  .form-grid,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .inline-form {
    align-items: stretch;
    flex-direction: column;
  }
}