:root {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f5f5f1;
  color: #171717;
  font-synthesis: none;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; }
.shell { width: min(780px, calc(100% - 32px)); margin: 0 auto; padding: 64px 0 48px; }
header { margin-bottom: 28px; }
.eyebrow { font-size: 12px; font-weight: 800; letter-spacing: .12em; color: #686868; margin-bottom: 8px; }
h1 { font-size: clamp(38px, 8vw, 66px); line-height: .98; letter-spacing: -.045em; margin: 0 0 18px; }
h1 span { color: #6a6a6a; font-weight: 500; }
h2 { font-size: 24px; letter-spacing: -.025em; margin: 0; }
.lede { max-width: 650px; font-size: 18px; line-height: 1.55; color: #555; margin: 0; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; }
.card { background: #fff; border: 1px solid #deded8; border-radius: 18px; padding: 22px; margin: 18px 0; box-shadow: 0 8px 30px rgba(0,0,0,.035); }
.hidden { display: none; }
.drop-zone { min-height: 220px; border: 2px dashed #bdbdb6; border-radius: 14px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 7px; cursor: pointer; text-align: center; padding: 24px; transition: .15s ease; }
.drop-zone:hover, .drop-zone.dragover, .drop-zone:focus-visible { border-color: #171717; background: #fafaf7; outline: none; }
.drop-zone strong { font-size: 19px; }
.drop-zone span { color: #727272; }
.drop-icon { width: 42px; height: 42px; border-radius: 50%; background: #171717; color: white; display: grid; place-items: center; font-size: 24px; margin-bottom: 5px; }
.status { margin-top: 14px; color: #666; font-size: 14px; }
.status.error { color: #a61b1b; }
.project-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; padding-bottom: 14px; border-bottom: 1px solid #ecece7; }
.meta { font-size: 13px; color: #666; text-align: right; line-height: 1.5; }
.track-list { margin-top: 8px; }
.track { display: grid; grid-template-columns: 34px 1fr auto; gap: 12px; align-items: center; padding: 13px 0; border-bottom: 1px solid #efefe9; }
.track:last-child { border-bottom: 0; }
.track-index { width: 28px; height: 28px; border-radius: 8px; background: #efefe9; display: grid; place-items: center; font-size: 12px; font-weight: 800; }
.track-name { font-weight: 700; }
.track-sub { color: #777; font-size: 13px; margin-top: 2px; }
.track-count { color: #555; font-variant-numeric: tabular-nums; font-size: 13px; }
.options { display: grid; gap: 10px; margin: 18px 0; }
.option { display: flex; gap: 12px; align-items: flex-start; padding: 14px; border: 1px solid #deded8; border-radius: 12px; cursor: pointer; }
.option.selected { border-color: #171717; background: #fafaf7; }
.option input { margin-top: 4px; }
.option span { display: grid; gap: 2px; }
.option small { color: #6d6d6d; font-size: 13px; line-height: 1.4; }
.primary { width: 100%; border: 0; border-radius: 12px; background: #171717; color: white; padding: 15px 18px; font: inherit; font-weight: 800; cursor: pointer; }
.primary:hover { opacity: .88; }
.primary:disabled { opacity: .45; cursor: default; }
.fine-print { font-size: 12px; color: #747474; line-height: 1.55; margin: 12px 2px 0; }
.ad-slot { min-height: 86px; border: 1px solid #deded8; color: #999; display: grid; place-items: center; font-size: 11px; text-transform: uppercase; letter-spacing: .12em; margin: 22px 0; background: #fafaf7; }
.how-it-works { padding: 16px 2px 0; color: #575757; line-height: 1.6; }
.how-it-works h2 { color: #171717; margin-bottom: 8px; }
@media (max-width: 560px) {
  .shell { width: min(100% - 22px, 780px); padding-top: 38px; }
  .card { padding: 16px; border-radius: 15px; }
  .project-head { display: block; }
  .meta { text-align: left; margin-top: 8px; }
}