:root {
  --color-bg: #f7f7f8;
  --color-surface: #ffffff;
  --color-border: #e2e2e6;
  --color-text: #1a1a1e;
  --color-text-muted: #6b6b73;
  --color-primary: #2f6fed;
  --color-primary-hover: #2557c4;
  --color-danger: #d64545;
  --color-warning: #b8860b;
  --color-warning-bg: #fff6e0;
  --radius: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-weight: 700; letter-spacing: -0.01em; }

a { color: var(--color-primary); }

button { font-family: inherit; cursor: pointer; }
input, select, button { font-size: 1rem; }

.btn {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius);
  padding: 0.5rem 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { border-color: var(--color-text-muted); }

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

.btn-danger { color: var(--color-danger); border-color: var(--color-danger); background: transparent; }
.btn-danger:hover { background: #fdeceb; }

.field { display: flex; flex-direction: column; gap: 0.3rem; }
.field label, .field-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  display: block;
}
.field input, .field select {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.card.no-pad { padding: 0; overflow-x: auto; }
.card-title { margin: 0; padding: 0.9rem 1rem 0.5rem; }

.inline-form {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.two-col { display: flex; gap: 1.25rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.two-col .card { margin-bottom: 0; }

table { width: 100%; border-collapse: collapse; }
th, td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
  vertical-align: middle;
}
th { color: var(--color-text-muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }

.row-actions { display: flex; gap: 0.5rem; align-items: flex-start; }

.badge-warning, .warning {
  display: inline-block;
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border-radius: var(--radius);
  padding: 0.15rem 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
}

.empty-state { color: var(--color-text-muted); padding: 2rem 0; text-align: center; }
.error { color: var(--color-danger); font-weight: 600; }
.muted { color: var(--color-text-muted); font-weight: 400; font-size: 0.85rem; }

.select-warning { border: 1px solid var(--color-warning) !important; }

.progress {
  flex: 1;
  min-width: 160px;
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}
.progress-bar { height: 100%; background: var(--color-primary); }

details summary { list-style: none; }
details summary::-webkit-details-marker { display: none; }

/* Header */
.app-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}
.header-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  flex-wrap: wrap;
}
.header-row h1 { font-size: 1.1rem; margin: 0; white-space: nowrap; }
.header-row select {
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}
.spacer { flex: 1; }

.tabs { display: flex; gap: 0.25rem; padding: 0 1.25rem; }
.tabs a {
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--color-text);
  font-weight: 600;
  padding: 0.6rem 0.75rem;
  text-decoration: none;
  display: inline-block;
}
.tabs a.active { border-bottom-color: var(--color-primary); color: var(--color-primary); }

main { padding: 1.25rem; flex: 1; max-width: 1100px; }

/* Login */
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.login-card { width: 100%; max-width: 360px; }
.login-card h1 { font-size: 1.4rem; margin-top: 0; }

@media (max-width: 640px) {
  .header-row { gap: 0.5rem; }
  main { padding: 1rem; }
  table { min-width: 480px; }
}