:root{
  --bg: #f3f4f6;
  --panel: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --border: rgba(17,24,39,.12);

  --primary: #374151;
  --primary-2: #111827;
  --accent: #6b7280;

  --btn-ghost-bg: rgba(17,24,39,.04);

  --field-bg: rgba(17,24,39,.02);
  --shadow: 0 10px 30px rgba(0,0,0,.06);

  --danger: #b91c1c;
  --ok: #0f766e;
  --warn: #b45309;

  --mono-bg: rgba(17,24,39,.06);

  color-scheme: light;
}

html[data-theme="dark"]{
  --bg: #0b1220;
  --panel: #0f172a;
  --text: #e5e7eb;
  --muted: #a3aab7;
  --border: rgba(229,231,235,.14);

  --primary: #cbd5e1;
  --primary-2: #ffffff;
  --accent: #94a3b8;

  --btn-ghost-bg: rgba(255,255,255,.06);

  --field-bg: rgba(255,255,255,.05);
  --shadow: 0 12px 30px rgba(0,0,0,.35);

  --mono-bg: rgba(255,255,255,.08);

  color-scheme: dark;
}

*{ 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);
}

.topbar{
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border-bottom: 1px solid var(--border);
  padding: 14px 16px;
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
}

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

.container{
  width: min(1100px, calc(100% - 24px));
  margin: 18px auto 42px;
}

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

.card h1{
  font-size: 20px;
  margin: 0 0 8px;
}
.card h2{
  font-size: 16px;
  margin: 0 0 10px;
}

.muted{ color: var(--muted); font-size: 13.5px; }
.help{ color: var(--muted); font-size: 12.5px; margin-top: 6px; }
.mono{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  background: var(--mono-bg);
  padding: 1px 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
}

.divider{
  height: 1px;
  background: var(--border);
  margin: 14px 0;
}

.grid{
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.grid.compact{
  grid-template-columns: 1fr 1.2fr;
}

.full{ grid-column: 1 / -1; }

.field{
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

label{
  font-size: 12.5px;
  color: var(--muted);
}

input, select, textarea{
  width: 100%;
  padding: 10px 10px;
  border-radius: 10px;
  background: var(--field-bg);
  color: var(--text);
  border: 1px solid var(--border);
  outline: none;
}

textarea{ resize: vertical; }

input::placeholder, textarea::placeholder{ color: color-mix(in srgb, var(--muted) 70%, transparent); }

input:focus, select:focus, textarea:focus{
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent);
}

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

.btn-primary, .btn-ghost{
  border-radius: 12px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  cursor: pointer;
  font-weight: 700;
  letter-spacing: .2px;
}

.btn-primary{
  background: var(--primary);
  color: var(--bg);
  border-color: color-mix(in srgb, var(--primary) 55%, var(--border));
}

.btn-ghost{
  background: var(--btn-ghost-bg);
  color: var(--text);
}

.btn-primary:active, .btn-ghost:active{
  transform: translateY(1px);
}

.results{
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 8px;
}

.result{
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
}

.result-title{
  font-size: 12.5px;
  color: var(--muted);
}

.result-value{
  font-size: 22px;
  font-weight: 900;
  margin-top: 6px;
  line-height: 1.1;
  word-break: break-word;
}

.card2{
  margin-top: 14px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  padding: 12px 14px;
}

details summary{
  cursor: pointer;
  font-weight: 800;
  color: var(--text);
}

.card2 ul{
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 13.5px;
}

.theme-controls{
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.theme-label span{ font-size: 12.5px; color: var(--muted); font-weight: 700; }

.segmented{
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: var(--btn-ghost-bg);
}

.seg-btn{
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 9px 12px;
  cursor: pointer;
  font-weight: 800;
  letter-spacing: .2px;
}

.seg-btn[aria-pressed="true"]{
  background: color-mix(in srgb, var(--primary) 18%, transparent);
  color: var(--text);
}

.footer{
  text-align: center;
  margin-top: 18px;
}

@media (max-width: 980px){
  .grid{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .results{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 520px){
  .topbar{ flex-direction: column; align-items: flex-start; }
  .grid{ grid-template-columns: 1fr; }
  .results{ grid-template-columns: 1fr; }
}