:root {
  --ink: #0f0f10;
  --ink-soft: #3a3a3e;
  --ink-mid: #6b6b72;
  --line: #e3e3df;
  --bg: #f3f2ee;
  --paper: #ffffff;
  --accent: #8b1e1e;
  --accent-soft: #fbf2f2;
  --warn: #b8935a;
  --warn-bg: #fdf6e8;
  --ok: #1d6b3f;
  --err: #b42318;
  --radius: 10px;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Topbar ---------- */
.topbar {
  background: var(--ink);
  color: #fff;
  padding: 16px 28px;
  display: flex;
  align-items: baseline;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { font-size: 22px; font-weight: 700; letter-spacing: -0.02em; }
.brand span { color: #d98a8a; font-weight: 300; margin: 0 2px; }
.topbar-sub { font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; color: #b9b9bd; }

/* ---------- Layout ---------- */
.wrap { max-width: 980px; margin: 0 auto; padding: 32px 20px 80px; }
.page-title { font-size: 30px; font-weight: 700; letter-spacing: -0.02em; }
.page-lead { color: var(--ink-mid); font-size: 14px; margin: 6px 0 24px; max-width: 70ch; }

/* ---------- Alert ---------- */
.alert {
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 22px;
  font-size: 14px;
}
.alert.error { background: #fdecea; border: 1px solid #f3c6c1; color: var(--err); }
.alert.success { background: #eaf6ee; border: 1px solid #bfe4cc; color: var(--ok); }
.alert ul { margin: 6px 0 0 18px; }
.alert a { color: inherit; font-weight: 600; }

/* ---------- Fieldset ---------- */
fieldset {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px 26px;
  margin-bottom: 18px;
}
legend {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  padding: 0 4px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.legend-num {
  background: var(--accent);
  color: #fff;
  width: 22px; height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}
.fieldset-note { font-size: 12.5px; color: var(--ink-mid); margin: 10px 0 4px; }

/* ---------- Grid & fields ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px 18px;
  margin-top: 16px;
}
.field { display: flex; flex-direction: column; gap: 5px; }
.field.wide { grid-column: span 2; }
.field.block { grid-column: 1 / -1; }
.field > span {
  font-size: 12px;
  color: var(--ink-mid);
  font-weight: 500;
}
.field > span small { color: var(--ink-mid); font-weight: 400; }
.field.req > span::after { content: ' *'; color: var(--accent); font-weight: 700; }

input, select, textarea {
  font-family: inherit;
  font-size: 14px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 11px;
  width: 100%;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
input:disabled { background: #f6f6f4; color: var(--ink-mid); }
textarea { resize: vertical; }
input.invalid, textarea.invalid { border-color: var(--err); box-shadow: 0 0 0 3px #fdecea; }
.hint { font-size: 11.5px; color: var(--err); min-height: 0; }
.hint:empty { display: none; }

/* ---------- Critical block (défauts) ---------- */
.critical {
  margin: 22px 0 18px;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  background: var(--warn-bg);
  padding: 16px 18px 18px;
}
.critical-head {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}
.critical-badge {
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  letter-spacing: 0.1em;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 5px;
}
.critical textarea { background: #fff; }

/* ---------- Totaux ---------- */
.total-box {
  background: var(--ink);
  color: #fff;
  border-radius: 8px;
  padding: 10px 14px;
  justify-content: center;
}
.total-box.soft { background: #4a4a4f; }
.total-box span { color: #c9c9cf; font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; }
.total-box output { font-size: 20px; font-weight: 600; }

/* ---------- Actions ---------- */
.actions {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 8px;
  position: sticky;
  bottom: 0;
  background: linear-gradient(transparent, var(--bg) 30%);
  padding: 18px 0 8px;
}
#submit-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 9px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background .15s, transform .05s;
}
#submit-btn:hover { background: #731818; }
#submit-btn:active { transform: translateY(1px); }
#submit-btn:disabled { background: #b58c8c; cursor: progress; }
.btn-secondary {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 14px 20px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: border-color .15s, color .15s;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
.status { font-size: 14px; color: var(--ink-mid); }

/* ---------- Historique ---------- */
.history { margin-top: 44px; }
.history h2 { font-size: 18px; font-weight: 600; margin-bottom: 14px; }
.history-list { display: flex; flex-direction: column; gap: 8px; }
.history-item {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13.5px;
}
.history-item .num { font-weight: 700; color: var(--accent); white-space: nowrap; }
.history-item .meta { color: var(--ink-soft); flex: 1; }
.history-item .meta small { color: var(--ink-mid); }
.history-item a {
  margin-left: auto;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 6px 12px;
  border-radius: 7px;
  font-weight: 500;
  white-space: nowrap;
}
.history-item a:hover { border-color: var(--accent); color: var(--accent); }
.empty { color: var(--ink-mid); font-size: 13.5px; }

@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr 1fr; }
  .field.wide { grid-column: span 2; }
}
@media (max-width: 520px) {
  .grid { grid-template-columns: 1fr; }
  .field.wide, .field.block { grid-column: 1 / -1; }
}