/* Thème via data-theme : system/light/dark */
:root{
  --bg: #f3f4f6;        /* gris claire */
  --panel: #ffffff;
  --text: #0f172a;      /* bleu très sombre */
  --muted: #475569;
  --border: rgba(15, 23, 42, 0.14);
  --shadow: 0 10px 25px rgba(2, 6, 23, 0.08);
  --focus: #2563eb;

  --primary: #111827;
  --primary-bg: #e5e7eb;

  --field-bg: #f9fafb;
  --btn-bg: #111827;
  --btn-text: #ffffff;
  --btn-hover: #0b1220;

  color-scheme: light dark; /* indique compatibilité UI */
}

:root[data-theme="dark"]{
  --bg: #0b1220;
  --panel: #0f172a;
  --text: #e5e7eb;
  --muted: #b6c2d1;
  --border: rgba(229, 231, 235, 0.18);
  --shadow: 0 18px 45px rgba(0,0,0,0.35);
  --focus: #60a5fa;

  --primary: #e5e7eb;
  --primary-bg: rgba(229,231,235,0.08);

  --field-bg: rgba(255,255,255,0.06);
  --btn-bg: #e5e7eb;
  --btn-text: #0b1220;
  --btn-hover: #ffffff;
}

*{ box-sizing: border-box; }

body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.4;
}

.skip-link{
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--panel);
  color: var(--text);
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  z-index: 999;
}
.skip-link:focus{
  left: 12px;
  top: 12px;
}

.topbar{
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 18px 16px;
  max-width: 1060px;
  margin: 0 auto;
}
.logo{
  width: 70px;
  height: auto;
  border-radius: 90px;
  display: grid;
  place-items: center;
  display: block;
}
h1{
  margin: 0;
  font-size: 18px;
  letter-spacing: 0.2px;
}
.subtitle{
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.theme{
  display: flex;
  gap: 10px;
  align-items: center;
}
.theme-label{
  color: var(--muted);
  font-size: 13px;
}
select{
  background: var(--field-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 14px;
}
select:focus{
  outline: 3px solid color-mix(in srgb, var(--focus) 65%, transparent);
  outline-offset: 2px;
}

.container{
  padding: 0 16px 28px;
  max-width: 1060px;
  margin: 0 auto;
}

.card{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 18px;
  margin-top: 14px;
}

h2{
  margin: 0 0 12px;
  font-size: 16px;
}

.grid{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
@media (max-width: 820px){
  .grid{ grid-template-columns: 1fr; }
  .topbar{ flex-direction: column; align-items: flex-start; }
}

.field{
  background: color-mix(in srgb, var(--field-bg) 60%, transparent);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
}
.field.full{
  grid-column: 1 / -1;
}

.field label{
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 8px;
}

input{
  width: 100%;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 15px;
}
input::placeholder{ color: color-mix(in srgb, var(--muted) 70%, transparent); }
input:focus{
  outline: 3px solid color-mix(in srgb, var(--focus) 65%, transparent);
  outline-offset: 2px;
}

.hint{
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.result-row{
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 14px;
}
@media (max-width: 820px){
  .result-row{ grid-template-columns: 1fr; }
}

.result{
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--field-bg) 55%, transparent);
}
.result-label{
  color: var(--muted);
  font-size: 13px;
}
.result-value{
  margin-top: 6px;
  font-size: 30px;
  font-weight: 800;
  letter-spacing: 0.2px;
}
.result-sub{
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.details{
  display: grid;
  gap: 10px;
}
.detail{
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--field-bg) 45%, transparent);
}
.detail-k{
  color: var(--muted);
  font-size: 13px;
}
.detail-v{
  font-weight: 700;
  font-size: 14px;
}

.actions{
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}
button{
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--btn-bg);
  color: var(--btn-text);
  border-radius: 12px;
  padding: 11px 14px;
  font-size: 14px;
  font-weight: 650;
}
button:hover{ filter: brightness(1.02); transform: translateY(-1px); }
button:active{ transform: translateY(0); }
button:focus{
  outline: 3px solid color-mix(in srgb, var(--focus) 65%, transparent);
  outline-offset: 2px;
}
button.ghost{
  background: transparent;
  color: var(--text);
}

.note{
  margin-top: 12px;
  color: var(--muted);
  font-size: 12px;
}

.small{
  color: var(--muted);
  font-size: 12px;
}

.footer{
  max-width: 1060px;
  margin: 0 auto;
  padding: 16px;
  color: var(--muted);
  font-size: 12px;
}