/* Giao diện chung cho các trang sản phẩm Di sản Huế */
@font-face { font-family: "Oswald"; font-style: normal; font-weight: 200 700; font-display: swap;
  src: url("/assets/fonts/oswald-vietnamese.woff2") format("woff2"); unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB; }
@font-face { font-family: "Oswald"; font-style: normal; font-weight: 200 700; font-display: swap;
  src: url("/assets/fonts/oswald-latin-ext.woff2") format("woff2"); unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Oswald"; font-style: normal; font-weight: 200 700; font-display: swap;
  src: url("/assets/fonts/oswald-latin.woff2") format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
:root {
  --wine: #870A32;
  --wine-dark: #5E0622;
  --rose: #E98A96;
  --paper: #FAFAFA;
  --line: #E9E6E6;
  --muted: #8a5a66;
  --ink: #3a1420;
  --night: #1c1517;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Oswald", system-ui, sans-serif; color: var(--wine); background: var(--paper);
  letter-spacing: .02em; overflow-x: hidden;
}
.ornament {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: .5;
  background: url("/assets/ornament-sm.webp") center / cover no-repeat;
}
@media (min-width: 801px) { .ornament { background-image: url("/assets/ornament.webp"); } }
.wrap { position: relative; z-index: 1; max-width: 1080px; margin: 0 auto; padding: 0 16px; }

.home {
  position: fixed; top: 14px; left: 14px; z-index: 5; width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center; background: rgba(255,255,255,.92); border: 1.5px solid var(--wine);
}
.home i { width: 22px; height: 22px; background: var(--wine);
  -webkit-mask: url("/assets/khoa/tag.webp") center / contain no-repeat; mask: url("/assets/khoa/tag.webp") center / contain no-repeat; }

.eyebrow {
  font-weight: 300; font-size: clamp(16px, 4vw, 20px); text-transform: uppercase; letter-spacing: .08em;
  color: var(--muted); padding-top: .2em;
}
h1 {
  font-weight: 600; text-transform: uppercase; line-height: 1.1; padding-top: .22em;
  font-size: clamp(40px, 9vw, 76px);
  background: linear-gradient(90deg, var(--wine), #c2185b 55%, var(--wine));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
h2 { font-weight: 500; font-size: clamp(26px, 5vw, 36px); text-transform: uppercase; line-height: 1.2; padding-top: .2em; }
p { color: var(--ink); line-height: 1.7; font-weight: 300; font-size: 17px; }

header.hero { padding: 80px 0 28px; text-align: center; display: grid; gap: 10px; justify-items: center; }
header.hero p { max-width: 640px; }

/* Khung tương tác */
.studio {
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 20px; align-items: start;
  margin: 18px 0 64px;
}
@media (max-width: 860px) { .studio { grid-template-columns: 1fr; } }
.stage {
  position: relative; background: radial-gradient(120% 90% at 50% 20%, #2b2023 0%, var(--night) 70%);
  border-radius: 24px; overflow: hidden; aspect-ratio: 4 / 5; box-shadow: 0 20px 50px rgba(60, 10, 25, .25);
}
.stage canvas { width: 100%; height: 100%; display: block; touch-action: none; }
.stage .code {
  position: absolute; left: 16px; bottom: 14px; color: #f3e9ea; font-size: 14px; letter-spacing: .1em;
  background: rgba(0,0,0,.35); padding: 4px 10px; border-radius: 999px;
}
.panel {
  background: rgba(255,255,255,.94); border: 1.5px solid var(--line); border-radius: 24px; padding: 22px;
  display: grid; gap: 18px; backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.panel h3 { font-weight: 500; font-size: 15px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1.5px solid var(--line); background: #fff; color: var(--ink); border-radius: 999px;
  padding: 8px 14px; font: inherit; font-size: 15px; cursor: pointer; transition: border-color .2s, background .2s, color .2s;
}
.chip[aria-pressed="true"] { border-color: var(--wine); background: var(--wine); color: #fff; }
.chip:hover { border-color: var(--wine); }
.chip .dot { display: inline-block; width: 12px; height: 12px; border-radius: 50%; margin-right: 6px; vertical-align: -1px; border: 1px solid rgba(0,0,0,.15); }
.roll {
  width: 100%; min-height: 56px; border: 0; border-radius: 16px; cursor: pointer;
  background: linear-gradient(90deg, var(--wine), #b0174a); color: #fff; font: inherit; font-size: 20px;
  text-transform: uppercase; letter-spacing: .06em; box-shadow: 0 8px 20px rgba(135, 10, 50, .3);
  transition: transform .15s;
}
.roll:active { transform: scale(.98); }
.field {
  width: 100%; min-height: 48px; border: 1.5px solid var(--line); border-radius: 12px; padding: 10px 14px;
  font: inherit; font-size: 16px; color: var(--ink); background: #fff;
}
.field:focus { outline: none; border-color: var(--wine); }
.range { width: 100%; accent-color: var(--wine); }
.note { font-size: 15px; color: var(--muted); }
.list { list-style: none; display: grid; gap: 6px; }
.list li { display: flex; align-items: center; gap: 10px; font-size: 16px; color: var(--ink); }
.list .sw { display: flex; gap: 3px; }
.list .sw i { width: 12px; height: 12px; border-radius: 50%; border: 1px solid rgba(0,0,0,.12); }
.list b { margin-left: auto; font-weight: 500; color: var(--wine); }
.rare { font-size: 12px; color: #9a6b00; background: #fff3cd; border-radius: 6px; padding: 1px 6px; }
.share { display: flex; gap: 8px; }
.share button {
  flex: 1; min-height: 42px; border-radius: 12px; border: 1.5px solid var(--wine); background: #fff;
  color: var(--wine); font: inherit; font-size: 15px; cursor: pointer;
}
.share button:hover { background: var(--wine); color: #fff; }

section.block { margin: 0 0 64px; display: grid; gap: 16px; }
.story { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; }
@media (max-width: 760px) { .story { grid-template-columns: 1fr; } }
.story .quote {
  position: relative; overflow: hidden; isolation: isolate;
  background: #860933; color: #fff; border-radius: 24px; padding: 28px;
}
.story .quote::before {
  content: ""; position: absolute; inset: 0; z-index: -1; mix-blend-mode: multiply;
  background: url("/assets/khoa/bg-son.webp") center / cover no-repeat;
}
.story .quote p { color: #fff; font-size: 20px; font-weight: 300; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.card { background: rgba(255,255,255,.94); border: 1.5px solid var(--line); border-radius: 20px; padding: 20px; display: grid; gap: 8px; }
.card h3 { font-weight: 500; font-size: 20px; text-transform: uppercase; }
.card p { font-size: 16px; }
.steps { counter-reset: s; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.steps div { background: #fff; border: 1.5px solid var(--wine); border-radius: 20px; padding: 20px; display: grid; gap: 6px; }
.steps div::before { counter-increment: s; content: counter(s); font-size: 40px; font-weight: 600; color: var(--rose); line-height: 1; }
.steps h3 { font-weight: 500; font-size: 20px; text-transform: uppercase; }
.cta {
  display: inline-flex; align-items: center; justify-content: center; min-height: 56px; padding: 0 28px;
  background: var(--wine); color: #fff; text-decoration: none; border-radius: 16px; font-size: 19px;
  text-transform: uppercase; letter-spacing: .05em; justify-self: center;
}
.cta:hover { background: var(--wine-dark); }

/* Sản phẩm khác */
.others { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.others a {
  display: grid; gap: 4px; padding: 18px 20px; border-radius: 20px; text-decoration: none;
  background: rgba(255,255,255,.94); border: 1.5px solid var(--line); transition: border-color .2s, transform .2s;
}
.others a:hover { border-color: var(--wine); transform: translateY(-2px); }
.others b { font-weight: 500; font-size: 20px; text-transform: uppercase; color: var(--wine); }
.others span { font-weight: 300; font-size: 15px; color: var(--muted); }
.others a[aria-current] { display: none; }

footer { position: relative; z-index: 1; text-align: center; color: var(--muted); padding: 24px 16px 40px; font-size: 14px; }
.toast {
  position: fixed; left: 50%; bottom: 20px; transform: translate(-50%, 20px); opacity: 0; z-index: 9;
  background: var(--wine-dark); color: #fff; padding: 10px 18px; border-radius: 12px; transition: .25s; pointer-events: none;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }