/* Phóng Sinh Xanh — trang giới thiệu. Tông màu: giấy dó, tường vàng Hội An, đèn lồng đỏ, sông Hoài xanh rêu */
:root {
  --paper: #f7f1e3;
  --paper-2: #efe5cf;
  --white: #fffcf4;
  --ink: #2b2620;
  --muted: #6b6152;
  --line: #e0d4b9;
  --wall: #e2ae45;
  --wall-soft: #f6e2b0;
  --lantern: #b93a1d;
  --lantern-dark: #8f2a12;
  --river: #1f4f56;
  --river-dark: #143a40;
  --wood: #7a5236;
  --serif: "Noto Serif", "Noto Serif KR", "Noto Serif JP", "Noto Serif SC", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Apple SD Gothic Neo", "Malgun Gothic", "Hiragino Sans", "Yu Gothic", "PingFang SC", "Microsoft YaHei", sans-serif;
  --radius: 18px;
  --shadow: 0 18px 50px -24px rgba(60, 40, 15, .45);
  --wrap: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.7 var(--sans); }
body.lang-ko, body.lang-ja, body.lang-zh { line-height: 1.8; word-break: keep-all; overflow-wrap: anywhere; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--river); text-underline-offset: 3px; }
a:hover { color: var(--lantern); }
h1, h2, h3 { font-family: var(--serif); font-weight: 700; line-height: 1.25; margin: 0 0 .5em; color: var(--ink); letter-spacing: -.01em; }
h1 { font-size: clamp(34px, 5.2vw, 60px); }
h2 { font-size: clamp(27px, 3.4vw, 40px); }
h3 { font-size: 20px; }
p { margin: 0 0 1em; }
.wrap { width: min(var(--wrap), 100% - 40px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 12px; }
:focus-visible { outline: 3px solid var(--wall); outline-offset: 3px; border-radius: 6px; }

/* ---------- header ---------- */
.site-header { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.header-row { display: flex; align-items: center; gap: 18px; height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); margin-right: auto; }
.brand img { border-radius: 9px; }
.brand span { display: flex; flex-direction: column; line-height: 1.15; }
.brand b { font-family: var(--serif); font-size: 18px; }
.brand small { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.desktop-nav { display: flex; gap: 4px; }
.desktop-nav a { color: var(--ink); text-decoration: none; font-size: 15px; padding: 8px 11px; border-radius: 999px; }
.desktop-nav a:hover { background: var(--paper-2); color: var(--lantern); }
.lang { position: relative; }
.lang summary { list-style: none; display: flex; align-items: center; gap: 6px; cursor: pointer; padding: 8px 12px; border: 1px solid var(--line); border-radius: 999px; font-size: 14px; font-weight: 600; background: var(--white); }
.lang summary::-webkit-details-marker { display: none; }
.lang summary svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.lang-menu { position: absolute; right: 0; top: calc(100% + 8px); background: var(--white); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); padding: 6px; min-width: 170px; display: grid; }
.lang-menu a { padding: 9px 12px; border-radius: 9px; text-decoration: none; color: var(--ink); font-size: 15px; }
.lang-menu a:hover { background: var(--paper-2); }
.lang-menu a[aria-current] { font-weight: 700; color: var(--lantern); }
.lang-suggest { background: var(--river); color: #f4efe2; font-size: 15px; }
.lang-suggest .wrap { display: flex; gap: 12px; align-items: center; justify-content: center; padding: 9px 0; flex-wrap: wrap; }
.lang-suggest a { color: #fff; font-weight: 700; }
.lang-suggest button { background: none; border: 0; color: #f4efe2; font-size: 20px; cursor: pointer; line-height: 1; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; border-radius: 999px; transition: transform .15s, box-shadow .15s, background .15s; }
.btn-play { background: var(--lantern); color: #fff8ec; padding: 13px 24px; box-shadow: 0 10px 26px -12px rgba(185, 58, 29, .8); }
.btn-play:hover { background: var(--lantern-dark); color: #fff; transform: translateY(-1px); }
.btn-play.big { font-size: 18px; padding: 16px 30px; }
.btn-play.small { padding: 9px 16px; font-size: 14px; box-shadow: none; }
.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin: 26px 0 14px; }
.store { display: inline-flex; align-items: center; gap: 10px; padding: 9px 16px 9px 12px; border-radius: 12px; background: var(--ink); color: #fff; text-decoration: none; line-height: 1.1; font-weight: 700; font-size: 16px; }
.store:hover { background: #000; color: #fff; }
.store svg { width: 24px; height: 24px; fill: currentColor; }
.store small { display: block; font-size: 10.5px; font-weight: 500; opacity: .8; }
/* chưa có link store (biến môi trường trống) -> ẩn nút */
a[href=""], a[href="mailto:"] { display: none !important; }

/* ---------- hero ---------- */
.hero { padding: clamp(36px, 6vw, 80px) 0 clamp(40px, 6vw, 72px); background:
  radial-gradient(ellipse 60% 70% at 85% 30%, rgba(226, 174, 69, .28), transparent 70%),
  radial-gradient(ellipse 50% 60% at 0% 100%, rgba(31, 79, 86, .12), transparent 70%); }
.hero-grid { display: grid; grid-template-columns: 1.02fr 1fr; gap: clamp(28px, 4vw, 56px); align-items: center; }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--lantern); background: var(--white); border: 1px solid var(--line); padding: 6px 12px; border-radius: 999px; margin-bottom: 18px; }
.hero h1 em { font-style: normal; color: var(--lantern); }
.lead { font-size: clamp(17px, 1.6vw, 20px); color: var(--muted); max-width: 36em; }
.hero-note { font-size: 14px; color: var(--muted); }
.hero-photo { margin: 0; }
.hero-frame { position: relative; }   /* khung viền trang trí chỉ ôm ảnh, không ôm chú thích */
.hero-photo img { border-radius: 26px; box-shadow: var(--shadow); aspect-ratio: 16 / 11; object-fit: cover; width: 100%; }
.hero-frame::before { content: ""; position: absolute; inset: 18px -18px -18px 18px; border: 2px solid var(--wall); border-radius: 26px; z-index: -1; }
.hero-photo figcaption { font-size: 13px; color: var(--muted); margin-top: 30px; padding-left: 4px; }   /* dưới mép khung lệch 18px */

/* ---------- sections ---------- */
.band { padding: clamp(56px, 7vw, 96px) 0; }
.band.alt { background: var(--paper-2); }
.num { font-family: var(--serif); font-size: 15px; font-weight: 700; color: var(--lantern); letter-spacing: .1em; margin-bottom: 6px; }
.num.small { font-size: 13px; margin: 0 0 4px; }
.kicker { font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--lantern); margin-bottom: 6px; }
.intro { font-size: 18px; color: var(--muted); max-width: 46em; margin-bottom: 34px; }
.cards { display: grid; gap: 18px; }
.cards.three { grid-template-columns: repeat(3, 1fr); }
.card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px; }
.card .ic { font-size: 30px; display: block; margin-bottom: 12px; }
.card p { color: var(--muted); margin: 0; font-size: 16px; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: s; }
.steps li { display: flex; gap: 16px; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.step-n { flex: none; width: 40px; height: 40px; border-radius: 50%; background: var(--river); color: #fff; display: grid; place-items: center; font: 700 18px var(--serif); }
.steps p { color: var(--muted); margin: 0; font-size: 16px; }
.tabs { display: inline-flex; background: var(--paper-2); border-radius: 999px; padding: 4px; margin-bottom: 22px; }
.tabs button { border: 0; background: none; font: 600 15px var(--sans); padding: 9px 20px; border-radius: 999px; cursor: pointer; color: var(--muted); }
.tabs button[aria-selected="true"] { background: var(--white); color: var(--ink); box-shadow: 0 2px 8px rgba(0, 0, 0, .08); }
.keys { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 26px; margin: 0; }
.keys div { display: flex; gap: 14px; align-items: baseline; padding: 12px 0; border-bottom: 1px dashed var(--line); }
.keys dt { flex: none; min-width: 128px; font-weight: 700; }
.keys dd { margin: 0; color: var(--muted); }
kbd { display: inline-block; min-width: 26px; text-align: center; font: 600 13px/1 ui-monospace, SFMono-Regular, Menlo, monospace; padding: 5px 7px; border-radius: 7px; background: var(--white); border: 1px solid var(--line); border-bottom-width: 3px; color: var(--ink); }

/* ---------- gallery ---------- */
.gallery-section { padding: clamp(56px, 7vw, 96px) 0; background: var(--river-dark); color: #efe8d8; }
.gallery-section h2 { color: #fff7e6; margin-bottom: 30px; }
.gallery-section .kicker { color: var(--wall); }
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.shot { background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .1); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.shot.wide { grid-column: span 2; grid-row: span 2; }
.shot img { aspect-ratio: 16 / 10; object-fit: cover; width: 100%; }
.shot.wide img { flex: 1; aspect-ratio: auto; min-height: 320px; }
.shot-text { padding: 18px 20px 20px; }
.shot h3 { color: #fff7e6; font-size: 19px; margin-bottom: 6px; }
.shot p { color: #c9d3cf; font-size: 15px; margin: 0; }
.shot .num { color: var(--wall); }

/* ---------- reading ---------- */
.reading { display: grid; grid-template-columns: 230px 1fr; gap: 56px; padding: clamp(56px, 7vw, 96px) 0; }
.toc { position: sticky; top: 96px; align-self: start; display: grid; gap: 4px; font-size: 15px; }
.toc p { font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.toc a { color: var(--ink); text-decoration: none; padding: 7px 0 7px 14px; border-left: 2px solid var(--line); }
.toc a:hover { border-color: var(--lantern); color: var(--lantern); }
.reading-body { max-width: 760px; }
.reading-body section + section { margin-top: 72px; padding-top: 56px; border-top: 1px solid var(--line); }
.reading-body h3 { margin-top: 30px; }
.content-figure { margin: 30px 0; }
.content-figure img { border-radius: var(--radius); box-shadow: var(--shadow); }
.content-figure figcaption { font-size: 14px; color: var(--muted); margin-top: 10px; }
.ticks { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.ticks li { position: relative; padding-left: 32px; }
.ticks li::before { content: "✓"; position: absolute; left: 0; top: 1px; width: 22px; height: 22px; border-radius: 50%; background: #dfeee3; color: #2c6e48; font-size: 13px; font-weight: 800; display: grid; place-items: center; }
.facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 0; }
.facts div { background: var(--white); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; }
.facts dt { font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--lantern); margin-bottom: 4px; }
.facts dd { margin: 0; font-size: 15.5px; }
.qa { background: var(--white); border: 1px solid var(--line); border-radius: 14px; margin-bottom: 10px; }
.qa summary { cursor: pointer; list-style: none; padding: 18px 52px 18px 20px; font-weight: 700; position: relative; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%); font-size: 24px; font-weight: 400; color: var(--lantern); transition: transform .2s; }
.qa[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.qa > div { padding: 0 20px 6px; color: var(--muted); }

/* ---------- closing & footer ---------- */
.closing { text-align: center; padding: clamp(64px, 8vw, 110px) 0; background:
  radial-gradient(ellipse 60% 80% at 50% 0%, rgba(226, 174, 69, .35), transparent 70%), var(--paper-2); }
.closing p { color: var(--muted); max-width: 36em; margin-inline: auto; font-size: 18px; }
.closing .cta-row { justify-content: center; }
.closing-mark { font-size: 44px; margin-bottom: 8px; }
.site-footer { background: #201b16; color: #c8bea9; padding: 56px 0 30px; font-size: 15px; }
.site-footer a { color: #efe5cf; text-decoration: none; display: block; padding: 3px 0; }
.site-footer a:hover { color: var(--wall); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; }
.brand-foot { display: flex; align-items: center; gap: 10px; font: 700 20px var(--serif); color: #fff7e6; }
.brand-foot img { border-radius: 7px; }
.foot-h { font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: #8f8573; margin-bottom: 8px; }
.social { display: flex; gap: 16px; flex-wrap: wrap; }
.fine { border-top: 1px solid #3a3229; margin-top: 36px; padding-top: 20px; font-size: 13px; color: #8f8573; }

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  .desktop-nav { display: none; }
  .reading { grid-template-columns: 1fr; gap: 0; }
  .toc { display: none; }
}
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-photo { order: -1; }
  .hero-frame::before { inset: 12px -10px -12px 10px; }
  .hero-photo figcaption { margin-top: 22px; }
  .cards.three, .steps { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr 1fr; }
  .shot.wide { grid-column: span 2; grid-row: auto; }
  .shot.wide img { min-height: 0; aspect-ratio: 16 / 10; }
  .keys, .facts { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > div:first-child { grid-column: span 2; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .wrap { width: calc(100% - 32px); }
  .header-row { gap: 10px; height: 60px; }
  .brand small { display: none; }
  .brand b { font-size: 16px; }
  .btn-play.small { padding: 8px 12px; font-size: 13px; }
  .lang summary { padding: 7px 10px; }
  .gallery { grid-template-columns: 1fr; }
  .shot.wide { grid-column: auto; }
  .keys dt { min-width: 96px; }
  .cta-row .btn-play.big { width: 100%; justify-content: center; }
}