:root {
  --bg: #f7f7f4;
  --ink: #142018;
  --muted: #5b6a60;
  --panel: #ffffff;
  --accent: #0f7a45;
  --accent-ink: #ffffff;
  --line: #d8ddd9;
  --err: #9b1c1c;
  --ok: #0f7a45;
  --font: "Sora", system-ui, sans-serif;
  --display: "Source Serif 4", Georgia, serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--ink);
  text-decoration: none;
}
.site-header nav {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
}
.site-header nav a { color: var(--ink); font-weight: 500; }

.wrap {
  width: min(980px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.hero h1, .slip-head h1, .auth h1, section > h1 {
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  margin: 0.2rem 0 0.75rem;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0;
}
.lead { color: var(--muted); max-width: 40rem; font-size: 1.05rem; }
.hint { color: var(--muted); }

.code-form, .panel, .auth {
  background: var(--panel);
  padding: 1.25rem;
  margin: 1.25rem 0;
  border: 1px solid var(--line);
}
.code-row { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 0.4rem; }
input, select, button {
  font: inherit;
}
input, select {
  border: 1px solid var(--line);
  background: #fff;
  padding: 0.7rem 0.8rem;
  min-width: 0;
  flex: 1;
}
label { display: grid; gap: 0.35rem; font-weight: 500; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-ink);
  border: 0;
  padding: 0.75rem 1.1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { filter: brightness(0.95); text-decoration: none; }
.btn-small { padding: 0.45rem 0.8rem; }
.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.linkish {
  background: none;
  border: 0;
  color: var(--ink);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  padding: 0;
}
form.inline { display: inline; margin: 0; }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}
.grid-3 article {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 1rem;
}
.grid-3 h2 {
  font-family: var(--display);
  font-size: 1.25rem;
  margin: 0 0 0.4rem;
}
.grid-3 p { margin: 0; color: var(--muted); }

.slip-table {
  width: 100%;
  border-collapse: collapse;
}
.slip-table th, .slip-table td {
  text-align: left;
  padding: 0.65rem 0.4rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.slip-table th { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }

.stack { display: grid; gap: 0.85rem; max-width: 26rem; }
.balance {
  font-family: var(--display);
  font-size: 2.4rem;
  margin: 0.2rem 0 1rem;
}

.flash {
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  border: 1px solid var(--line);
  background: #fff;
}
.flash-ok { border-color: var(--ok); color: var(--ok); }
.flash-err { border-color: var(--err); color: var(--err); }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.25rem;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 800px) {
  .grid-3 { grid-template-columns: 1fr; }
  .site-header { flex-direction: column; align-items: flex-start; }
}