/* Układ roboczy Frontier (do czasu projektu z Design.md). Białe tło, bez ozdobników. */
:root {
  --ink: #17181c;
  --ink-soft: #55575f;
  --line: #e2e8f2;
  --paper: #ffffff;
  --accent: #0096ff;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.65 Manrope, system-ui, sans-serif; }
.top { display: flex; justify-content: space-between; align-items: center; padding: 16px 24px; border-bottom: 1px solid var(--line); }
.brand { color: var(--ink); text-decoration: none; font-weight: 700; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 32px; line-height: 1.2; margin: 0 0 16px; }
h2 { font-size: 22px; margin: 32px 0 8px; }
a { color: var(--accent); }
img { max-width: 100%; height: auto; }
.button, button { display: inline-block; border: 0; border-radius: 16px; padding: 14px 24px; background: var(--accent); color: #fff; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.button.light, .logout button { background: #fff; color: var(--ink); border: 1px solid #cbd5e1; }
.email-form { display: grid; gap: 8px; margin: 24px 0; }
.email-form input[type=email] { font: inherit; padding: 12px; border: 1px solid #cbd5e1; border-radius: 12px; }
.notice { padding: 12px 16px; border: 1px solid var(--line); border-radius: 12px; }
.hint, .crumbs, .missing { color: var(--ink-soft); }
.lessons, .courses, .downloads, .links { padding-left: 20px; }
.locked { color: var(--ink-soft); }
.check, .done { color: #22a559; }
.video { position: relative; aspect-ratio: 16 / 9; margin: 16px 0; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
@media (max-width: 640px) { h1 { font-size: 26px; } }