:root {
  --bg: #f6f3ee;
  --card: #ffffff;
  --text: #1c1917;
  --muted: #78716c;
  --line: #e7e1d9;
  --accent: #be123c;
  --accent-ink: #ffffff;
  --soft: #fff1f2;
  --radius: 16px;
  --shadow: 0 1px 2px rgb(0 0 0 / .05), 0 8px 24px rgb(0 0 0 / .06);
  --serif: Georgia, "Iowan Old Style", "Times New Roman", serif;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0d0c;
    --card: #1a1716;
    --text: #efe9e3;
    --muted: #a8a09a;
    --line: #2c2725;
    --accent: #fb7185;
    --accent-ink: #1a0508;
    --soft: #2a1418;
    --shadow: 0 1px 2px rgb(0 0 0 / .4), 0 8px 24px rgb(0 0 0 / .35);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
img { display: block; max-width: 100%; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 18px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* header */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; height: 58px; }
.logo { display: flex; align-items: center; gap: 8px; font: 700 22px/1 var(--serif); color: var(--text); text-decoration: none; letter-spacing: -.3px; white-space: nowrap; }
.logo-mark { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-size: 17px; }
.code-form { display: flex; gap: 8px; }
.code-form input {
  flex: 1; min-width: 0; padding: 12px 14px; font: inherit; font-weight: 700; text-transform: uppercase; letter-spacing: 1px;
  border: 1.5px solid var(--line); border-radius: 12px; background: var(--card); color: var(--text); outline: none;
}
.code-form input::placeholder { text-transform: none; font-weight: 400; letter-spacing: 0; color: var(--muted); }
.code-form input:focus { border-color: var(--accent); }
.code-form button {
  padding: 0 20px; font: inherit; font-weight: 700; border: 0; border-radius: 12px; cursor: pointer;
  background: var(--accent); color: var(--accent-ink);
}
.code-form.mini input { width: 92px; padding: 7px 10px; font-size: 14px; border-radius: 999px; }
.code-form.mini button { padding: 0 12px; border-radius: 999px; }

/* ô nhập mã */
.codebox { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 20px; margin: 22px 0; padding: 16px 18px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.codebox h2 { flex: 1 1 260px; margin: 0; font-size: 16px; font-weight: 700; }
.codebox .code-form { flex: 1 1 260px; min-width: 0; }
.codebox .code-form button { white-space: nowrap; }
.codebox .code-form input { font-size: 17px; padding: 10px 14px; }
.code-hint { flex-basis: 100%; margin: 0; color: var(--muted); font-size: 13px; }
.code-err { flex-basis: 100%; margin: 0; color: #dc2626; font-weight: 600; }

/* mã truyện cuối tiêu đề */
.tcode { font: 600 .55em/1 system-ui, sans-serif; letter-spacing: .5px; color: var(--muted); opacity: .75; vertical-align: .15em; white-space: nowrap; }

/* ảnh */
.thumb, .cover { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: var(--line); }
.thumb img, .cover img { width: 100%; height: 100%; object-fit: cover; }
.ph { display: grid; place-items: center; padding: 18px; text-align: center;
  background: radial-gradient(120% 90% at 20% 10%, hsl(var(--h) 55% 38%), hsl(calc(var(--h) + 40) 45% 14%)); }
.ph span { font: italic 700 clamp(18px, 3vw, 26px)/1.2 var(--serif); color: rgb(255 255 255 / .9); text-shadow: 0 2px 12px rgb(0 0 0 / .4); }

/* truyện nổi bật */
.feature { display: grid; grid-template-columns: 1.35fr 1fr; overflow: hidden; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); color: var(--text); text-decoration: none; }
.feature .thumb { aspect-ratio: auto; min-height: 300px; }
.feature-body { padding: 28px; display: flex; flex-direction: column; justify-content: center; }
.kicker { align-self: flex-start; padding: 3px 10px; border-radius: 999px; background: var(--soft); color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; }
.feature h2 { margin: 12px 0 10px; font: 700 clamp(24px, 3.2vw, 32px)/1.2 var(--serif); letter-spacing: -.3px; }
.feature p { margin: 0 0 14px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.feature:hover h2 { color: var(--accent); }

/* lưới truyện */
.section-title { margin: 38px 0 16px; font: 700 24px/1.2 var(--serif); }
.grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); }
.card {
  display: flex; flex-direction: column; overflow: hidden; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  color: var(--text); text-decoration: none; box-shadow: var(--shadow); transition: transform .15s, box-shadow .15s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 2px 4px rgb(0 0 0 / .06), 0 14px 32px rgb(0 0 0 / .12); }
.card .thumb img { transition: transform .4s; }
.card:hover .thumb img { transform: scale(1.04); }
.card-body { padding: 16px 18px 18px; display: flex; flex-direction: column; flex: 1; }
.card h3 { margin: 0 0 8px; font: 700 19px/1.3 var(--serif); }
.card:hover h3 { color: var(--accent); }
.card p { margin: 0 0 12px; color: var(--muted); font-size: 14.5px; line-height: 1.55; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { margin-top: auto; font-size: 13px; color: var(--muted); }
.pager { display: flex; justify-content: space-between; align-items: center; margin: 30px 0; color: var(--muted); }

/* trang truyện */
.story { max-width: 700px; margin: 0 auto; padding: 26px 0 10px; }
.story .cover { border-radius: var(--radius); margin-bottom: 22px; box-shadow: var(--shadow); }
.story h1 { margin: 0 0 10px; font: 700 clamp(28px, 5.5vw, 40px)/1.2 var(--serif); letter-spacing: -.5px; }
.meta { color: var(--muted); font-size: 15px; }
.parts { display: flex; flex-wrap: wrap; gap: 6px; margin: 16px 0 0; }
.parts a, .parts span { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; font-weight: 700; font-size: 14px; text-decoration: none; border: 1px solid var(--line); color: var(--muted); background: var(--card); }
.parts .on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.text { font: 20px/1.8 var(--serif); margin-top: 24px; }
.text p { margin: 0 0 1.1em; }
.page .text { font: 17px/1.7 system-ui, sans-serif; }

.next-btn {
  display: block; margin: 30px 0 10px; padding: 22px 24px; border-radius: var(--radius); text-decoration: none;
  background: var(--accent); color: var(--accent-ink); box-shadow: 0 10px 28px color-mix(in srgb, var(--accent) 35%, transparent);
  transition: transform .15s;
}
.next-btn:hover { transform: translateY(-2px); }
.next-label { display: block; font-size: 20px; font-weight: 800; }
.next-teaser { display: block; margin-top: 6px; opacity: .88; font: italic 16px/1.5 var(--serif); }
.prev-link { display: inline-block; margin: 8px 0 0; color: var(--muted); }
.the-end { text-align: center; margin: 34px 0; font: 700 15px var(--serif); letter-spacing: 4px; color: var(--muted); }
.story .grid { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.aff { margin: 10px 0 24px; padding: 20px; text-align: center; background: var(--soft); border-radius: var(--radius); }
.aff p { margin: 0 0 12px; font-weight: 600; }
.aff-btn { display: inline-block; padding: 12px 24px; border-radius: 12px; background: var(--accent); color: var(--accent-ink); font-weight: 800; text-decoration: none; }

/* quảng cáo */
.ad { margin: 24px 0; min-height: 100px; }
.ad-ph { display: grid; place-items: center; border: 2px dashed var(--line); border-radius: 10px; color: var(--muted); font-size: 12px; letter-spacing: 2px; }

/* footer */
.foot { margin-top: 60px; padding: 26px 0 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 18px; margin-bottom: 8px; }
.foot a { color: var(--muted); }

@media (max-width: 760px) {
  .feature { grid-template-columns: 1fr; }
  .feature .thumb { aspect-ratio: 16 / 9; min-height: 0; }
  .feature-body { padding: 18px 18px 20px; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .text { font-size: 19px; }
  .grid { grid-template-columns: 1fr; }
  .logo { font-size: 19px; }
}