:root{
  color-scheme: light dark;
  --bg: #f5f6f7;
  --card: #ffffff;
  --text: #111827;
  --muted: #4b5563;

  --border: rgba(17,24,39,.12);
  --shadow: 0 10px 30px rgba(0,0,0,.06);

  --primary: #2563eb;     /* bleu lisible */
  --primaryText: #ffffff;

  --btn: #e5e7eb;
  --btnText: #111827;

  --focus: rgba(37,99,235,.35);
  --chipBg: rgba(0,0,0,.04);

  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

[data-theme="dark"]{
  --bg: #0b1220;
  --card: #0f172a;
  --text: #e5e7eb;
  --muted: #9ca3af;

  --border: rgba(229,231,235,.14);
  --shadow: 0 14px 40px rgba(0,0,0,.35);

  --primary: #60a5fa;
  --primaryText: #081018;

  --btn: #1f2937;
  --btnText: #e5e7eb;

  --focus: rgba(96,165,250,.35);
  --chipBg: rgba(255,255,255,.06);
}

*{ box-sizing: border-box; }

body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
}

.container{
  max-width: 980px;
  margin: 28px auto;
  padding: 0 16px;
}

.topbar{
  display: flex;
  gap: 18px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
}

.logo{
  width: 70px;
  height: auto;
  border-radius: 90px;
  display: grid;
  place-items: center;
  display: block;
}

h1{
  font-size: 1.35rem;
  margin: 0;
  line-height: 1.2;
}

.subtitle{
  margin: 8px 0 0;
  color: var(--muted);
}

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 18px;
}

.form{ display: grid; gap: 14px; }

.field label{
  display: block;
  font-weight: 650;
  margin-bottom: 8px;
}

input[type="date"]{
  width: 100%;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 1rem;
  outline: none;
}

input[type="date"]:focus{
  box-shadow: 0 0 0 4px var(--focus);
  border-color: rgba(37,99,235,.35);
}

.hint{
  margin-top: 10px;
  color: var(--muted);
  font-size: .95rem;
}

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

.btn{
  border: 1px solid var(--border);
  background: var(--btn);
  color: var(--btnText);
  padding: 11px 14px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
}

.btn:hover{
  filter: brightness(0.98);
}

.btn:focus{
  outline: none;
  box-shadow: 0 0 0 4px var(--focus);
}

.btn.primary{
  border-color: transparent;
  background: var(--primary);
  color: var(--primaryText);
}

.theme__label{
  font-weight: 650;
  color: var(--muted);
  margin-bottom: 8px;
  font-size: .95rem;
}

.segmented{
  display: inline-flex;
  padding: 6px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--chipBg);
  gap: 6px;
}

.segmented__item{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  user-select: none;
  color: var(--muted);
  font-weight: 650;
  transition: background .15s ease, color .15s ease;
}

.segmented__item input{
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid currentColor;
  display: inline-block;
  position: relative;
  margin: 0;
}

.segmented__item input:checked{
  color: var(--text);
}

.segmented__item input:checked::after{
  content: "";
  position: absolute;
  inset: 2px;
  border-radius: 50%;
  background: currentColor;
}

.segmented__item:has(input:checked){
  background: rgba(37,99,235,.12);
  color: var(--text);
}

.result{
  margin-top: 14px;
  padding-top: 12px;
}

.result__row{
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 10px 0;
  border-top: 1px dashed rgba(127,127,127,.25);
}

.result__row:first-child{
  border-top: none;
}

.result__label{
  width: 180px;
  color: var(--muted);
  font-weight: 650;
}

.result__value{
  font-size: 1.25rem;
  font-weight: 750;
}

.mono{ font-family: var(--mono); }

.footerNote{
  margin-top: 14px;
  color: var(--muted);
  font-size: .95rem;
}

.pageFooter{
  margin-top: 14px;
  color: var(--muted);
  font-size: .9rem;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

@media (max-width: 760px){
  .topbar{
    flex-direction: column;
    align-items: stretch;
  }
  .result__label{
    width: 140px;
  }
}