:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #6b6b70;
  --border: #dddbd5;
  --accent: #b5452f;
  --accent-hover: #9a3a27;
  --error-bg: #fdecea;
  --error-text: #a12a1a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.5;
}

.site-header {
  text-align: center;
  padding: 48px 16px 24px;
}
.site-header h1 { margin: 0 0 4px; font-size: 1.9rem; letter-spacing: .04em; }
.site-header p  { margin: 0; color: var(--muted); }

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 16px 64px;
}

/* ---------- 上傳 ---------- */
.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 56px 24px;
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: 14px;
  cursor: pointer;
  text-align: center;
  transition: border-color .15s, background .15s;
}
.dropzone:hover,
.dropzone:focus-visible,
.dropzone.dragover {
  border-color: var(--accent);
  background: #fffaf8;
  outline: none;
}
.dropzone.disabled { pointer-events: none; opacity: .55; }
.dz-icon  { width: 44px; height: 44px; color: var(--accent); }
.dz-title { font-size: 1.1rem; }
.dz-title u { color: var(--accent); text-decoration-thickness: 1px; }
.dz-hint  { font-size: .88rem; color: var(--muted); }

.status {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.status.error {
  background: var(--error-bg);
  border-color: transparent;
  color: var(--error-text);
}
.spinner {
  width: 18px; height: 18px;
  border: 2.5px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
  flex: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 結果 ---------- */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.file-info { color: var(--muted); font-size: .92rem; min-width: 0; overflow-wrap: anywhere; }
.file-info .label { font-size: .78rem; padding: 1px 6px; border-radius: 4px; background: #ebe9e3; }
.file-info .arrow { margin: 0 6px; }
.file-info span:not(.label):not(.arrow) { color: var(--text); }
.actions { display: flex; gap: 8px; }

.btn {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 8px;
  font: inherit;
  font-size: .95rem;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }
.btn.secondary { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn.secondary:hover { border-color: var(--muted); }

.preview {
  background: #e9e7e1;
  border-radius: 12px;
  padding: 24px;
  display: flex;
  justify-content: center;
}
.preview img {
  display: block;
  max-width: 100%;
  height: auto;
  background: #fff;
  box-shadow: 0 2px 12px rgba(0, 0, 0, .12);
}
.preview iframe {
  width: 100%;
  height: 80vh;
  border: 0;
  background: #fff;
}
.preview .no-preview { color: var(--muted); padding: 40px 0; }

@media (max-width: 560px) {
  .site-header { padding-top: 32px; }
  .dropzone { padding: 40px 16px; }
  .preview { padding: 10px; }
  .actions { width: 100%; }
  .actions .btn { flex: 1; text-align: center; }
}

/* ---------- 共用 ---------- */
.topnav {
  display: flex;
  gap: 20px;
  align-items: center;
  max-width: 920px;
  margin: 0 auto;
  padding: 14px 16px;
}
.topnav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
.topnav a:hover, .topnav a[aria-current] { color: var(--text); }
.topnav .brand { color: var(--text); font-weight: 600; margin-right: auto; }

main.narrow { max-width: 560px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  margin-bottom: 16px;
}
.card h2 { font-size: 1.05rem; margin: 0 0 10px; }
.card h2:not(:first-child) { margin-top: 22px; }

.muted { color: var(--muted); }
.small { font-size: .85rem; }
.center { text-align: center; }
a { color: var(--accent); }
code { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }

.btn:disabled { opacity: .55; cursor: default; }
.btn.block { display: block; width: 100%; margin-top: 18px; padding: 12px; font-size: 1rem; }

.text-input, .unlock-form input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  background: #fff;
  color: var(--text);
}
.text-input:focus, .unlock-form input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }

.form-msg { color: var(--error-text); margin: 10px 0 0; }
.form-msg.ok { color: #2e6b3a; }

/* ---------- 解鎖 ---------- */
.unlock-card p { margin: 0 0 12px; }
.unlock-form { display: flex; gap: 8px; }
.unlock-form input {
  flex: 1;
  min-width: 0;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.unlock-form .btn { flex: none; }
.unlock-card .small { margin: 12px 0 0; }

/* ---------- 購買 ---------- */
.test-banner {
  background: #fff6db;
  border: 1px solid #ecd68d;
  color: #6b5413;
  border-radius: 10px;
  padding: 10px 14px;
  margin-bottom: 16px;
  font-size: .92rem;
}
.options { display: grid; gap: 8px; }
.options.packages { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.option {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 8px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
}
.option:has(input:checked) { border-color: var(--accent); background: #fffaf8; box-shadow: 0 0 0 1px var(--accent); }
.option input { accent-color: var(--accent); margin: 0; }
.opt-title { font-weight: 600; }
.opt-sub { grid-column: 2; font-size: .85rem; color: var(--muted); }

.order-list { list-style: none; margin: 0; padding: 0; }
.order-list li { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-top: 1px solid var(--border); flex-wrap: wrap; }
.order-list li:first-child { border-top: 0; }

/* ---------- 訂單 ---------- */
.kv { display: grid; grid-template-columns: auto 1fr; gap: 8px 16px; margin: 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; overflow-wrap: anywhere; }
.badge { display: inline-block; padding: 1px 10px; border-radius: 999px; font-size: .85rem; background: #ebe9e3; }
.badge.awaiting_payment { background: #fff1d6; color: #7a5a12; }
.badge.paid { background: #dff1e3; color: #23602f; }

.pay-info { margin-top: 18px; padding: 12px 16px; background: var(--bg); border-radius: 10px; }
.pay-info p { margin: 4px 0; overflow-wrap: anywhere; }
.waiting { display: flex; gap: 10px; align-items: center; margin-top: 18px; color: var(--muted); font-size: .92rem; }
.paid { margin-top: 20px; text-align: center; }
.paid p { margin: 6px 0; }
.code-box { display: flex; justify-content: center; align-items: center; gap: 10px; flex-wrap: wrap; margin: 8px 0 12px; }
.code-box code { font-size: 1.6rem; letter-spacing: .12em; padding: 6px 14px; background: var(--bg); border-radius: 8px; }
.dev-box { margin-top: 20px; padding: 12px 16px; border: 1px dashed #ecd68d; background: #fffbea; border-radius: 10px; font-size: .9rem; }
.dev-box p { margin: 0 0 10px; }

@media (max-width: 560px) {
  .unlock-form { flex-direction: column; }
  .card { padding: 16px; }
}