:root {
  --bg: #ffffff;
  --bg-soft: #f4f4f5;
  --ink: #131b2e;
  --ink-soft: #45464d;
  --muted: #6f7280;
  --line: #e5e7eb;
  --primary: #000000;
  --on-primary: #ffffff;
  --accent: #ffddb4;
  --danger: #b3261e;
  --ok: #1b6e2f;
  --radius: 4px;
  --shadow: 0 10px 30px rgba(19, 27, 46, 0.06), 0 2px 6px rgba(19, 27, 46, 0.04);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: inherit; }
.container { max-width: 720px; margin: 0 auto; padding: 56px 24px; }
.brand-bar { border-bottom: 1px solid var(--line); padding: 18px 24px; display: flex; align-items: center; justify-content: space-between; }
.brand { font-family: 'Source Serif 4', Georgia, serif; font-weight: 700; font-size: 20px; letter-spacing: -0.01em; }
.brand small { font-weight: 400; color: var(--muted); margin-left: 8px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.18em; }
.nav-links a { text-decoration: none; color: var(--ink-soft); font-size: 13px; margin-left: 18px; }
.nav-links a:hover { color: var(--primary); }
h1 { font-family: 'Source Serif 4', Georgia, serif; font-weight: 700; font-size: 36px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-family: 'Source Serif 4', Georgia, serif; font-weight: 600; font-size: 22px; margin: 0 0 6px; letter-spacing: -0.01em; }
.lead { color: var(--ink-soft); font-size: 15px; line-height: 1.55; margin: 0 0 28px; }
.card { background: var(--bg); border: 1px solid var(--line); padding: 28px; box-shadow: var(--shadow); }
.card + .card { margin-top: 18px; }
.field { display: flex; flex-direction: column; gap: 6px; margin: 0 0 14px; }
label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); font-weight: 600; }
input { padding: 12px 14px; border: 1px solid var(--line); background: var(--bg-soft); font-size: 15px; font-family: inherit; color: var(--ink); transition: border-color .15s ease, background .15s ease; }
input:focus { outline: none; border-color: var(--ink); background: var(--bg); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 22px; background: var(--primary); color: var(--on-primary); text-decoration: none; border: 0; font-family: inherit; font-size: 13px; letter-spacing: 0.18em; text-transform: uppercase; font-weight: 600; cursor: pointer; transition: opacity .15s ease, transform .15s ease; width: 100%; }
.btn:hover { opacity: 0.88; }
.btn:active { transform: scale(0.99); }
.btn[disabled] { opacity: 0.5; cursor: progress; }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--on-primary); }
.muted { color: var(--muted); font-size: 13px; }
.alert { padding: 12px 14px; border-left: 3px solid var(--danger); background: #fff1f0; color: var(--danger); margin-bottom: 16px; font-size: 14px; }
.alert.ok { border-color: var(--ok); background: #effaf2; color: var(--ok); }
.summary { display: flex; align-items: baseline; justify-content: space-between; padding: 14px 0; border-bottom: 1px dashed var(--line); }
.summary:last-of-type { border-bottom: 0; }
.price { font-family: 'JetBrains Mono', monospace; font-size: 26px; font-weight: 600; letter-spacing: -0.02em; }
.kicker { font-size: 11px; text-transform: uppercase; letter-spacing: 0.2em; color: var(--muted); margin-bottom: 12px; font-weight: 600; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.training { border: 1px solid var(--line); padding: 20px; background: var(--bg); transition: border-color .15s ease, transform .15s ease; }
.training:hover { border-color: var(--ink); }
.training .meta { display: flex; gap: 12px; margin: 8px 0 10px; }
.training .meta span { font-size: 11px; text-transform: uppercase; letter-spacing: 0.16em; color: var(--muted); }
.training .desc { color: var(--ink-soft); font-size: 14px; line-height: 1.55; margin: 0 0 14px; }
.training .row { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.tag { display: inline-block; font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; padding: 4px 8px; border: 1px solid var(--line); color: var(--muted); }
.empty { text-align: center; padding: 60px 20px; color: var(--muted); border: 1px dashed var(--line); }
.footer { padding: 28px 24px; text-align: center; color: var(--muted); font-size: 12px; border-top: 1px solid var(--line); margin-top: 80px; }
@media (max-width: 600px) {
  .container { padding: 32px 18px; }
  h1 { font-size: 28px; }
  .grid { grid-template-columns: 1fr; }
}