:root {
  --bg: #0f1c1a;
  --card: #1c332e;
  --ink: #f3f7f5;
  --muted: #9bb3ac;
  --accent: #2f9e7b;
  --accent2: #e8c07d;
  --line: rgba(255,255,255,.1);
  --font: "Segoe UI", system-ui, sans-serif;
  --display: Georgia, "Times New Roman", serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(800px 400px at 0% 0%, rgba(47,158,123,.22), transparent 55%),
    linear-gradient(160deg, #0f1c1a, #162824);
}
.hidden { display: none !important; }
.brand { font-family: var(--display); font-size: 1.8rem; margin: 0; color: var(--accent2); }
.sub { color: var(--muted); margin: 6px 0 0; line-height: 1.45; }
.shell { display: grid; place-items: center; min-height: 100vh; padding: 24px; }
.card {
  background: color-mix(in srgb, var(--card) 92%, black);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
}
.narrow { width: min(420px, 100%); }
.layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
  max-width: 1100px;
  margin: 0 auto;
}
aside {
  padding: 28px 18px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
main { padding: 28px; display: grid; gap: 16px; align-content: start; }
h1, h2 { font-family: var(--display); font-weight: 500; margin: 0 0 8px; }
label { display: grid; gap: 6px; color: var(--muted); font-size: .9rem; margin-bottom: 10px; }
input {
  width: 100%; border-radius: 12px; border: 1px solid var(--line);
  background: rgba(0,0,0,.25); color: var(--ink); padding: 12px 14px; font: inherit;
}
.btn {
  appearance: none; border: 0; border-radius: 999px; padding: 12px 18px;
  background: linear-gradient(135deg, var(--accent), #1f7a5e);
  color: #fff; font-weight: 650; cursor: pointer; font: inherit;
}
.btn.secondary { background: transparent; border: 1px solid var(--line); color: var(--ink); }
.stack { display: grid; gap: 10px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.full { grid-column: 1 / -1; }
.hint { font-size: .78rem; color: var(--muted); }
.err, .ok { padding: 10px 12px; border-radius: 12px; margin-bottom: 12px; }
.err { background: rgba(229,115,115,.15); border: 1px solid rgba(229,115,115,.35); color: #ffc9c9; }
.ok { background: rgba(47,158,123,.15); border: 1px solid rgba(47,158,123,.35); color: #c9ffe8; }
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); }
a { color: var(--accent2); }
.table-wrap { overflow-x: auto; }
@media (max-width: 800px) {
  .layout { grid-template-columns: 1fr; }
  .grid2 { grid-template-columns: 1fr; }
  aside { border-right: 0; border-bottom: 1px solid var(--line); }
}