:root{
  --bg: #f5f6f7;
  --panel: rgba(255,255,255,.75);
  --text: #111827;
  --muted: #4b5563;
  --border: rgba(17,24,39,.12);
  --shadow: 0 10px 30px rgba(0,0,0,.06);
  --primary: #111827;
  --primaryText: #ffffff;
  --focus: #2563eb;

  --radius: 16px;
  --gap: 16px;

  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

:root[data-theme="dark"]{
  --bg: #0b1220;
  --panel: rgba(17,24,39,.72);
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: rgba(229,231,235,.14);
  --shadow: 0 14px 40px rgba(0,0,0,.35);
  --primary: #e5e7eb;
  --primaryText: #0b1220;
  --focus: #60a5fa;
}

*{ box-sizing: border-box; }

html, body { height: 100%; }

body{
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: radial-gradient(1200px 600px at 10% 0%, rgba(37,99,235,.10), transparent 55%),
              radial-gradient(900px 500px at 90% 10%, rgba(16,185,129,.10), transparent 50%),
              var(--bg);
  line-height: 1.55;
}

.skip-link{
  position: absolute;
  left: -999px;
  top: 8px;
  padding: 10px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  z-index: 999;
}
.skip-link:focus{ left: 12px; outline: 3px solid var(--focus); outline-offset: 2px; }

.topbar{
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 18px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand{
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.title{ font-weight: 800; letter-spacing: .2px; }
.subtitle{ font-size: .95rem; color: var(--muted); }

.theme{
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-label{
  color: var(--muted);
  font-size: .95rem;
}

select{
  appearance: none;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  font: inherit;
  box-shadow: 0 6px 20px rgba(0,0,0,.05);
}

.container{
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 18px 40px;
}

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

h1{
  margin: 0 0 14px;
  font-size: 1.3rem;
  letter-spacing: .2px;
}
h2{
  margin: 0 0 14px;
  font-size: 1.05rem;
  letter-spacing: .2px;
}

.field-label{
  display: block;
  font-weight: 700;
  margin-bottom: 8px;
}

.field-hint{
  display: inline-block;
  font-weight: 500;
  color: var(--muted);
  margin-left: 8px;
  font-size: .92rem;
}

textarea{
  width: 100%;
  resize: vertical;
  min-height: 180px;
  padding: 14px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 1rem;
  outline: none;
}

textarea:focus{
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.toolbar{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.left{ display: flex; gap: 10px; flex-wrap: wrap; }
.right{ display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.btn{
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  font: inherit;
  cursor: pointer;
}

.btn:hover{ background: rgba(127,127,127,.08); }

.btn:focus{
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

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

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

.checkbox{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  user-select: none;
  font-size: .95rem;
}

.checkbox input{
  width: 16px; height: 16px;
  accent-color: var(--focus);
}

.grid{
  margin-top: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 920px){
  .grid{ grid-template-columns: 1fr; }
  .topbar{ flex-direction: column; align-items: flex-start; }
}

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

.stat{
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.05);
}

.stat.small .k{ margin-bottom: 6px; }
.k{
  color: var(--muted);
  font-weight: 700;
  font-size: .95rem;
  margin-bottom: 6px;
}

.v{
  font-size: 1.9rem;
  font-weight: 900;
  letter-spacing: .2px;
  line-height: 1.1;
}

.d{
  color: var(--muted);
  margin-top: 6px;
  font-size: .98rem;
}

.metrics{
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.metrics li{
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.05);
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.metrics .key{
  color: var(--muted);
  font-weight: 700;
}
.metrics .val{
  font-weight: 800;
}

.note{
  margin-top: 12px;
  color: var(--muted);
  font-size: .95rem;
}

.footer{
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 18px 30px;
  color: var(--muted);
  font-size: .95rem;
}