:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --card: #fff;
  --border: #d8dee4;
  --accent: #1f6feb;
  --text: #1f2328;
  --muted: #656d76;
  --danger: #cf222e;
  --ok: #1a7f37;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}
a { color: var(--accent); }
.hidden { display: none !important; }
.layout { max-width: 1100px; margin: 0 auto; padding: 16px; }
.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  padding: 12px 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.topbar nav { display: flex; gap: 8px; flex-wrap: wrap; }
.topbar a {
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--text);
}
.topbar a.active { background: #e8f0fe; color: var(--accent); font-weight: 600; }
.topbar .spacer { flex: 1; }
h1 { font-size: 1.35rem; margin: 0 0 12px; }
h2 { font-size: 1.05rem; margin: 0 0 10px; }
.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.card-head h2 {
  margin: 0;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 14px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
}
.grid-pair {
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  max-width: 520px;
}
@media (max-width: 520px) {
  .grid-pair {
    grid-template-columns: 1fr;
    max-width: none;
  }
}
label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.88rem;
}
input, select, textarea, button { font: inherit; }
input, select, textarea {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  width: 100%;
  background: #fff;
}
input[readonly] {
  background: #f6f8fa;
  color: var(--muted);
  cursor: default;
}
textarea { min-height: 72px; resize: vertical; }
button {
  border: none;
  border-radius: 8px;
  padding: 9px 14px;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
}
button.secondary { background: #eaeef2; color: var(--text); border: 1px solid var(--border); }
button.danger { background: var(--danger); }
button:disabled { opacity: 0.55; cursor: not-allowed; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.muted { color: var(--muted); font-size: 0.88rem; }
.status { margin-top: 8px; font-size: 0.9rem; }
.status.error { color: var(--danger); }
.status.ok { color: var(--ok); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { border-bottom: 1px solid var(--border); padding: 8px 6px; text-align: left; }
th { color: var(--muted); font-weight: 600; }
.line-item {
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 10px;
  background: #fafbfc;
}
.line-item-head {
  margin-bottom: 10px;
}
.line-item-head strong {
  font-size: 0.9rem;
  font-weight: 600;
}
.line-item > .secondary {
  margin-top: 8px;
}

/* Performance form */
.perf-form {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.form-section {
  margin: 0;
  padding: 0 0 20px;
  border: none;
  border-bottom: 1px solid var(--border);
}
.form-section:last-child {
  padding-bottom: 0;
  border-bottom: none;
}
.form-section-title {
  margin: 0 0 14px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}
.form-grid {
  display: grid;
  gap: 14px 18px;
  align-items: end;
}
.field {
  min-width: 0;
}
.field .muted {
  font-weight: 400;
}

/* Meta: 5 fields in one row on desktop */
.form-grid--meta {
  grid-template-columns: 1fr;
}
.form-grid--client {
  grid-template-columns: 1fr;
}
.form-grid--line {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .form-grid--meta {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.15fr) minmax(0, 1.1fr) 92px;
    align-items: end;
  }
  .form-grid--meta .field--payment {
    grid-column: 1 / -1;
    max-width: 320px;
  }

  .form-grid--client {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr);
    grid-template-areas:
      "name tax po"
      "addr addr addr";
  }
  .form-grid--client .field--client-name { grid-area: name; }
  .form-grid--client .field--tax-id { grid-area: tax; }
  .form-grid--client .field--po { grid-area: po; }
  .form-grid--client .field--address { grid-area: addr; }

  .form-grid--line {
    grid-template-columns: 96px 112px minmax(0, 1fr);
    align-items: start;
  }
  .form-grid--line .field--qty,
  .form-grid--line .field--unit {
    align-self: end;
  }
  .form-grid--line .field--desc textarea {
    min-height: 100px;
  }
}

#perf-form.card {
  padding: 20px 24px;
}
#perf-form .form-section + .form-section {
  margin-top: 20px;
}
.pill {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.78rem;
  background: #eaeef2;
}
.pill.off { background: #ffebe9; color: var(--danger); }
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
}
.stat {
  background: #f6f8fa;
  border-radius: 8px;
  padding: 12px;
}
.stat strong { display: block; font-size: 1.2rem; }
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.login-card { width: 100%; max-width: 360px; }