:root {
  --bg: #e8e1d6;
  --ink: #051228;
  --muted: rgba(5, 18, 40, .62);
  --line: rgba(5, 18, 40, .14);
  --card: rgba(255, 255, 255, .5);
  --accent: #b4472b;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14120f;
    --ink: #f2ede6;
    --muted: rgba(242, 237, 230, .6);
    --line: rgba(242, 237, 230, .16);
    --card: rgba(255, 255, 255, .05);
    --accent: #e0714f;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 system-ui, -apple-system, "Noto Sans TC", "PingFang TC", sans-serif;
  -webkit-text-size-adjust: 100%;
}
a { color: inherit; }

header.site, footer.site {
  display: flex; align-items: center; gap: .75rem;
  max-width: 48rem; margin: 0 auto; padding: 1.25rem;
  font-size: .8125rem;
}
footer.site { color: var(--muted); border-top: 1px solid var(--line); margin-top: 4rem; }
.brand { font-weight: 800; letter-spacing: .04em; text-decoration: none; }
.tag {
  padding: .15rem .5rem; border: 1px solid var(--line);
  border-radius: 999px; color: var(--muted);
}

section { max-width: 48rem; margin: 0 auto; padding: 0 1.25rem; }

.hero { padding-top: 2rem; padding-bottom: 3rem; }
h1 {
  font-size: clamp(2rem, 7vw, 3.25rem);
  line-height: 1.15; letter-spacing: -.02em; margin: 0 0 1.25rem;
}
.lede { font-size: 1.0625rem; max-width: 36rem; margin: 0 0 1rem; }
.lede.sub { color: var(--muted); font-size: .9375rem; }

.cta {
  display: inline-block; margin-top: 1rem;
  padding: .9rem 1.5rem; border-radius: .5rem;
  background: var(--ink); color: var(--bg);
  font-weight: 700; text-decoration: none;
}
.cta:hover { opacity: .88; }

h2 { font-size: 1.25rem; margin: 0 0 .5rem; letter-spacing: -.01em; }
.hint { font-size: .8125rem; color: var(--muted); margin: .25rem 0 0; }

.panel {
  background: var(--card); border: 1px solid var(--line);
  border-radius: .75rem; padding: 1.25rem; margin-bottom: 1.5rem;
}

.chips { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .9rem; }
.chip {
  padding: .5rem .9rem; border: 1px solid var(--line); border-radius: 999px;
  background: transparent; color: var(--ink); font: inherit; font-size: .875rem;
  cursor: pointer;
}
.chip[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }

.progress-wrap { margin-bottom: 2rem; }
.progress-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: .5rem; font-size: .875rem;
}
.progress-head strong { font-size: 1.125rem; }
.bar { height: .5rem; background: var(--line); border-radius: 999px; overflow: hidden; }
.bar-fill { height: 100%; width: 0; background: var(--accent); transition: width .25s ease; }
.reset {
  margin-top: .75rem; padding: 0; border: 0; background: none;
  color: var(--muted); font: inherit; font-size: .8125rem;
  text-decoration: underline; cursor: pointer;
}

.cat { margin-bottom: 2rem; }
.cat-head {
  display: flex; align-items: baseline; gap: .5rem;
  padding-bottom: .5rem; border-bottom: 1px solid var(--line); margin-bottom: .25rem;
}
.cat-head h3 { font-size: 1rem; margin: 0; }
.cat-count { margin-left: auto; font-size: .8125rem; color: var(--muted); }

.item { display: flex; gap: .75rem; padding: .8rem .25rem; border-bottom: 1px solid var(--line); }
.item:last-child { border-bottom: 0; }
.item input[type="checkbox"] {
  flex: none; width: 1.15rem; height: 1.15rem; margin-top: .2rem;
  accent-color: var(--accent); cursor: pointer;
}
.item-body { min-width: 0; }
.item-title { font-weight: 600; }
.item.done .item-title { text-decoration: line-through; opacity: .5; }
.item-link {
  display: inline-block; margin-top: .2rem;
  font-size: .8125rem; color: var(--muted);
}
.item-audience {
  display: inline-block; margin-left: .4rem; padding: .05rem .4rem;
  border: 1px solid var(--line); border-radius: 999px;
  font-size: .6875rem; color: var(--muted); vertical-align: middle;
}

.item.locked { opacity: .55; }
.item.locked .item-title::after { content: " 🔒"; }
.item.locked .item-link { filter: blur(3px); pointer-events: none; user-select: none; }

.upsell {
  margin-top: 3rem; padding-top: 2rem; padding-bottom: 2rem;
  border-top: 1px solid var(--line);
}
.upsell[hidden] { display: none; }
.benefits { margin: 1rem 0; padding-left: 1.2rem; }
.benefits li { margin-bottom: .5rem; }

/* 痛點提問區：縮排＋左側線，讓一連串問句讀起來是一組，不是散句 */
.questions {
  margin: 1rem 0;
  padding-left: 1rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

@media (max-width: 30rem) {
  .item-link { display: block; }
}