/* Mảnh Ký Ức — CSS dùng chung cho manhkyuc.vn và covua.manhkyuc.vn.
   Bảng màu nối tiếp bộ ảnh in (config.RAINBOW, INK, BG) để web và ảnh xuất ra
   nhìn như cùng một nhà. */
:root{
  --bg:#fffbf7; --bg2:#fff4ea; --card:#ffffff;
  --ink:#2f2842; --ink2:#57506b; --muted:#8b8399; --line:#efe6dc;
  --coral:#e2705c; --purple:#7b6dc8; --teal:#2f9e8f; --sun:#f4b43c; --sky:#3d8fd6;
  --r1:#ff9e8f; --r2:#ffbe7d; --r3:#ffd98a; --r4:#8fd9b0; --r5:#8ed2e2; --r6:#aab3ef; --r7:#c9a5e2;
  --rainbow:linear-gradient(90deg,var(--r1),var(--r2),var(--r3),var(--r4),var(--r5),var(--r6),var(--r7));
  --win:#1c7ed6; --draw:#a29aa8; --loss:#f03e3e;
  --radius:20px; --shadow:0 1px 2px rgba(47,40,66,.06),0 8px 28px rgba(47,40,66,.08);
  --wrap:1120px; --gut:16px;
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0; color:var(--ink); background:var(--bg);
  font:16px/1.65 "Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background-image:
    radial-gradient(900px 500px at 100% -10%,rgba(255,190,125,.22),transparent 60%),
    radial-gradient(700px 500px at -10% 30%,rgba(142,210,226,.20),transparent 60%),
    radial-gradient(800px 600px at 110% 70%,rgba(201,165,226,.18),transparent 60%);
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--purple)}
h1,h2,h3{line-height:1.22;margin:0;letter-spacing:-.01em}
h1{font-size:clamp(30px,6.4vw,56px);font-weight:800}
h2{font-size:clamp(25px,4.4vw,38px);font-weight:800}
h3{font-size:18px;font-weight:700}
p{margin:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut)}
.hl{color:var(--coral)} .hl2{color:var(--purple)}
.muted{color:var(--muted)}
.rainbow{height:6px;background:var(--rainbow)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- đầu trang ---------- */
.top{position:sticky;top:0;z-index:20;background:rgba(255,251,247,.86);
  backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);
  border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:16px;height:62px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:18px;white-space:nowrap}
.brand svg{width:32px;height:32px;flex:none}
.brand small{display:block;font-size:11px;font-weight:600;color:var(--muted);letter-spacing:.04em;line-height:1}
.brand .tag{font-size:12px;font-weight:700;color:#fff;background:var(--purple);padding:2px 9px;border-radius:99px;margin-left:2px}
.nav{margin-left:auto;display:flex;gap:4px}
.nav a{white-space:nowrap;color:var(--ink2);text-decoration:none;font-weight:600;font-size:14.5px;padding:8px 12px;border-radius:99px}
.nav a:hover{background:var(--bg2);color:var(--ink)}
@media (max-width:820px){.nav a:not(.keep){display:none}}

/* ---------- nút ---------- */
.btns{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:12px 22px;
  border-radius:99px;font-weight:700;font-size:16px;text-decoration:none;border:2px solid transparent;cursor:pointer;
  transition:transform .15s ease,box-shadow .15s ease}
.btn:hover{transform:translateY(-1px)}
.btn.main{background:var(--coral);color:#fff;box-shadow:0 6px 18px rgba(226,112,92,.35)}
.btn.alt{background:#fff;color:var(--ink);border-color:var(--line)}
.btn.soon{background:#fff;color:var(--muted);border:2px dashed #e1d6ca;cursor:default}
.btn.soon:hover{transform:none}
@media (max-width:520px){.btns .btn{flex:1 1 100%}}

/* ---------- khối chung ---------- */
section{padding:72px 0}
section.tight{padding:48px 0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:700;color:var(--purple);
  background:#f1eefc;padding:6px 14px;border-radius:99px;margin-bottom:16px}
.head{max-width:720px;margin-bottom:36px}
.head p{color:var(--ink2);margin-top:12px;font-size:17px}
.center{text-align:center;margin-left:auto;margin-right:auto}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:900px){.g4{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.g2,.g3{grid-template-columns:1fr}}
@media (max-width:420px){.g4.keep2{grid-template-columns:1fr 1fr}.g4:not(.keep2){grid-template-columns:1fr}}

/* ---------- hero ---------- */
.hero{padding:56px 0 64px}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero p.lead{font-size:clamp(17px,2.2vw,19px);color:var(--ink2);margin:20px 0 28px;max-width:560px}
.hero .note{margin-top:18px;font-size:14px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px 16px}
.hero .note span::before{content:"✓";color:var(--teal);font-weight:800;margin-right:6px}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr;gap:36px}.hero{padding:32px 0 48px}}

/* ---------- cam kết ---------- */
.promise{padding:24px;display:flex;flex-direction:column;gap:10px}
.promise .ic{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;font-size:24px}
.promise p{color:var(--ink2);font-size:15px}

/* ---------- ảnh mẫu & hộp xem ảnh ---------- */
.shot{padding:0;overflow:hidden;display:flex;flex-direction:column;text-decoration:none;color:inherit;cursor:zoom-in}
.shot .pic{background:var(--bg2);aspect-ratio:2/3;overflow:hidden}
.shot .pic.wide{aspect-ratio:1702/630}
.shot img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.shot:hover img{transform:scale(1.03)}
.shot .tx{padding:16px 18px 20px}
.shot .tx p{color:var(--ink2);font-size:14.5px;margin-top:4px}
.shot .size{display:inline-block;font-size:12px;font-weight:700;color:var(--muted);background:var(--bg2);border-radius:6px;padding:1px 8px;margin-top:10px}
dialog.lb{border:0;padding:0;background:transparent;max-width:min(96vw,1100px);max-height:94vh}
dialog.lb::backdrop{background:rgba(30,24,44,.82)}
dialog.lb img{max-height:88vh;width:auto;margin:auto;border-radius:12px}
dialog.lb .cap{color:#fff;text-align:center;font-size:14px;margin-top:10px}
dialog.lb button{position:fixed;top:14px;right:14px;width:44px;height:44px;border-radius:99px;border:0;background:#fff;
  color:var(--ink);font-size:22px;cursor:pointer}

/* ---------- các bước ---------- */
.steps{counter-reset:s}
.step{padding:24px;position:relative}
.step::before{counter-increment:s;content:counter(s);width:40px;height:40px;border-radius:99px;display:grid;place-items:center;
  font-weight:800;color:#fff;background:var(--purple);margin-bottom:14px}
.step:nth-child(2)::before{background:var(--coral)}
.step:nth-child(3)::before{background:var(--teal)}
.step:nth-child(4)::before{background:var(--sun)}
.step p{color:var(--ink2);font-size:15px;margin-top:6px}

/* ---------- câu chuyện ---------- */
.story{padding:clamp(24px,5vw,48px);display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,48px);align-items:center;overflow:hidden;position:relative}
.story::before{content:"";position:absolute;inset:0 0 auto 0;height:6px;background:var(--rainbow)}
.story p{color:var(--ink2);margin-top:14px}
.story blockquote{margin:22px 0 0;padding:16px 20px;border-left:4px solid var(--coral);background:var(--bg2);border-radius:0 14px 14px 0;
  font-weight:600;color:var(--ink);font-size:17px}
.story blockquote cite{display:block;font-style:normal;font-weight:500;font-size:13.5px;color:var(--muted);margin-top:6px}
@media (max-width:820px){.story{grid-template-columns:1fr}}

/* ---------- con số ---------- */
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.stat{padding:16px 12px;text-align:center;border-radius:16px;background:#fff;border:1px solid var(--line)}
.stat b{display:block;font-size:clamp(26px,4.5vw,36px);font-weight:800;line-height:1.1}
.stat span{font-size:13px;color:var(--muted);font-weight:600}
.stat:nth-child(4n+1) b{color:var(--coral)} .stat:nth-child(4n+2) b{color:#d9932a}
.stat:nth-child(4n+3) b{color:var(--teal)} .stat:nth-child(4n+4) b{color:var(--purple)}
@media (max-width:520px){.stats{grid-template-columns:1fr 1fr}}

/* ---------- câu hỏi ---------- */
.faq{max-width:780px;margin:0 auto;display:grid;gap:12px}
.faq details{padding:0 20px}
.faq summary{cursor:pointer;list-style:none;padding:18px 32px 18px 0;font-weight:700;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:0;top:12px;font-size:26px;font-weight:500;color:var(--purple);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{color:var(--ink2);padding-bottom:18px;font-size:15.5px}

/* ---------- chân trang ---------- */
footer{margin-top:24px;border-top:1px solid var(--line);background:#fff}
footer .wrap{padding-top:32px;padding-bottom:32px;display:flex;flex-wrap:wrap;gap:16px 40px;justify-content:space-between;font-size:14px;color:var(--ink2)}
footer .links{display:flex;flex-wrap:wrap;gap:8px 20px}
footer a{color:var(--ink2)}
footer .fine{flex-basis:100%;color:var(--muted);font-size:13px}

/* ---------- hiệu ứng nhẹ khi cuộn ---------- */
@media (prefers-reduced-motion:no-preference){
  .js .rise{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
  .js .rise.in{opacity:1;transform:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}