/* ============================================================
   goi.css — kiểu dùng chung cho 4 trang gói · Kẹo Mút Studio
   (đồng bộ design system với index.html)
   ============================================================ */
:root{
  --be:#F4EFE7;
  --kem:#FCFAF6;
  --cat:#EBE2D4;
  --cat-sau:#DFD3C0;
  --hong-be:#F1E6DC;
  --nau-nhat:#9B9083;
  --nau-mo:#C6BCAE;
  --nau:#453B31;
  --cam:#E86A33; /* cam thương hiệu Kẹo Mút — dùng làm điểm nhấn bảng giá */
  --tron:'Nunito','Helvetica Neue',Arial,sans-serif;
  --sans:'Be Vietnam Pro','Helvetica Neue',Arial,sans-serif;
  --lien:cubic-bezier(.25,.8,.35,1);
  --bo:26px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--be);color:var(--nau);
  font-family:var(--sans);font-weight:300;font-size:15px;line-height:1.9;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
:focus-visible{outline:1px solid var(--nau);outline-offset:4px}

.khung{max-width:1140px;margin:0 auto;padding:0 28px}
.nhan{display:inline-block;font-family:var(--tron);font-weight:600;font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--nau-nhat)}
.vien-nhan{background:var(--kem);border:1px solid var(--cat);border-radius:999px;padding:6px 15px}
.giua{text-align:center}
.dau{margin-bottom:40px}
.dau h2{font-family:var(--tron);font-weight:700;font-size:clamp(22px,2.5vw,30px);letter-spacing:-.02em;margin-top:14px;line-height:1.3}
.dau p{color:#5A5147;max-width:52ch;margin:12px auto 0;font-size:14.5px}

/* ---------- thanh đầu (sticky) ---------- */
.dinh{position:fixed;top:0;left:0;right:0;z-index:60;padding:14px 0}
.dinh-trong{
  max-width:1140px;margin:0 auto;padding:9px 12px 9px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:rgba(252,250,246,.82);backdrop-filter:blur(16px);
  border:1px solid var(--cat);border-radius:999px;
}
.hieu{font-family:var(--tron);font-weight:700;font-size:15px;letter-spacing:.02em}
.hieu small{font-weight:400;color:var(--nau-nhat);font-size:11px;letter-spacing:.04em}
.mo-menu{position:relative;width:44px;height:44px;flex:none;border:0;background:none;cursor:pointer;border-radius:999px}
.mo-menu span{position:absolute;left:13px;width:18px;height:1.6px;background:var(--nau);border-radius:2px;transition:transform .35s var(--lien),opacity .2s}
.mo-menu span:nth-child(1){top:16px}
.mo-menu span:nth-child(2){top:21px}
.mo-menu span:nth-child(3){top:26px}
body.menu-mo .mo-menu span:nth-child(1){transform:translateY(5px) rotate(45deg)}
body.menu-mo .mo-menu span:nth-child(2){opacity:0}
body.menu-mo .mo-menu span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- lớp menu phủ ---------- */
.lop-menu{position:fixed;inset:0;z-index:55;background:rgba(244,239,231,.97);backdrop-filter:blur(22px);display:flex;flex-direction:column;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .4s var(--lien),visibility .4s}
body.menu-mo .lop-menu{opacity:1;visibility:visible}
body.menu-mo{overflow:hidden}
.menu-trong{display:flex;flex-direction:column;align-items:center;gap:2px}
.menu-trong a{font-family:var(--tron);font-weight:600;font-size:clamp(22px,3.6vw,32px);letter-spacing:-.01em;color:var(--nau);padding:6px 16px;opacity:0;transform:translateY(10px);transition:opacity .5s var(--lien),transform .5s var(--lien),color .3s}
.menu-trong a:hover{color:var(--nau-nhat)}
.menu-trong a[aria-current="page"]{color:var(--nau-nhat)}
body.menu-mo .menu-trong a{opacity:1;transform:none}
body.menu-mo .menu-trong a:nth-child(1){transition-delay:.05s}
body.menu-mo .menu-trong a:nth-child(2){transition-delay:.09s}
body.menu-mo .menu-trong a:nth-child(3){transition-delay:.13s}
body.menu-mo .menu-trong a:nth-child(4){transition-delay:.17s}
body.menu-mo .menu-trong a:nth-child(5){transition-delay:.21s}
body.menu-mo .menu-trong a:nth-child(6){transition-delay:.25s}
.menu-vach{width:34px;height:1px;background:var(--cat-sau);margin:18px 0}
.menu-dt{font-size:14px;color:var(--nau-nhat);letter-spacing:.02em;border-bottom:1px solid var(--cat-sau);padding-bottom:3px}

/* ---------- hero gói ---------- */
.hero-goi{padding:140px 0 42px}
.dau-vet{font-size:12px;color:var(--nau-nhat);margin-bottom:18px;display:flex;gap:9px;justify-content:center}
.dau-vet a{border-bottom:1px solid var(--cat-sau);transition:color .3s}
.dau-vet a:hover{color:var(--nau)}
.hero-goi h1{font-family:var(--tron);font-weight:700;font-size:clamp(27px,3.8vw,44px);line-height:1.3;letter-spacing:-.02em;max-width:24ch;margin:0 auto}
.hero-goi h1 span{color:var(--nau-nhat);font-weight:300}
.hero-mo{max-width:48ch;margin:16px auto 0;color:#5A5147;font-size:15px}
.tin-hero{display:flex;gap:10px 26px;justify-content:center;flex-wrap:wrap;margin-top:24px;font-size:12.5px;color:var(--nau-nhat)}
.tin-hero span{display:inline-flex;align-items:center;gap:7px}
.tin-hero span::before{content:"";width:5px;height:5px;border-radius:999px;background:var(--nau-mo)}
.cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:28px}
.nut{font-family:var(--tron);font-weight:600;font-size:14px;padding:14px 26px;border-radius:999px;transition:transform .3s var(--lien),box-shadow .3s,background .3s,color .3s;display:inline-flex;align-items:center;gap:8px}
.nut-chinh{background:var(--nau);color:var(--kem);box-shadow:0 14px 30px -14px rgba(69,59,49,.7)}
.nut-chinh:hover{transform:translateY(-3px);box-shadow:0 18px 36px -14px rgba(69,59,49,.8)}
.nut-phu{background:var(--kem);color:var(--nau);border:1px solid var(--cat-sau)}
.nut-phu:hover{transform:translateY(-3px);border-color:var(--nau-mo)}

/* ---------- khung ảnh + ô chờ ảnh ---------- */
.o-anh{position:relative;background:var(--cat);border-radius:18px;overflow:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px}
.o-anh::after{content:attr(data-ghi);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:#A79B8B;text-align:center;padding:0 20px;line-height:2}
.o-anh img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.d-doc{aspect-ratio:3/4}
.d-ngang{aspect-ratio:16/10}
.o-cho{background:var(--kem);border:1.5px dashed var(--cat-sau)}
.o-cho::before{content:"📷";font-size:19px;opacity:.4}

/* ---------- thư viện ảnh ---------- */
.thu-vien{padding:26px 0 96px}
.tv-luoi{columns:3;column-gap:16px}
.tv-luoi>a,.tv-luoi>.o-anh{display:block;margin-bottom:16px;border-radius:16px;overflow:hidden;break-inside:avoid;position:relative}
.tv-luoi>.o-anh{display:flex}
.tv-luoi>a{background:var(--cat)}
.tv-luoi img{width:100%;height:auto;transition:transform .6s var(--lien)}
.tv-luoi a:hover img{transform:scale(1.05)}

/* ---------- bảng giá ---------- */
.bang-gia{padding:0 0 96px}
.gia-luoi{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;align-items:stretch}
.the-gia{position:relative;display:flex;flex-direction:column;background:var(--kem);border:1px solid var(--cat);border-radius:var(--bo);padding:26px 20px 20px;transition:transform .4s var(--lien),box-shadow .4s var(--lien),border-color .4s}
.the-gia:hover{transform:translateY(-5px);box-shadow:0 20px 42px -26px rgba(69,59,49,.5);border-color:var(--nau-mo)}
.the-gia.noi-bat{border:1.5px solid rgba(232,106,51,.55)}
.nhan-yeu{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--cam);color:#FFF6EF;font-family:var(--tron);font-weight:700;font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;padding:5px 14px;border-radius:999px;white-space:nowrap;box-shadow:0 8px 18px -8px rgba(232,106,51,.55)}
.the-dau{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.qua{width:42px;height:42px;border-radius:14px;background:var(--hong-be);display:flex;align-items:center;justify-content:center;font-size:20px;flex:none}
.the-dau h3{font-family:var(--tron);font-weight:700;font-size:19px;line-height:1.2}
.so-cc{font-family:var(--tron);font-weight:700;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--nau-nhat)}
.tien{font-family:var(--tron);font-weight:700;font-size:32px;letter-spacing:-.02em;padding-bottom:13px;border-bottom:1px solid var(--cat)}
.tien small{font-size:15px;color:var(--nau-nhat);font-weight:600;margin-left:2px}
.gom{list-style:none;margin:15px 0 20px;display:flex;flex-direction:column;gap:8px;flex-grow:1}
.gom li{font-size:13.5px;color:#5A5147;line-height:1.65;display:flex;gap:9px;align-items:flex-start}
.gom li::before{content:"";width:5px;height:5px;border-radius:999px;background:var(--nau-mo);margin-top:9px;flex:none}
.gom b{color:var(--nau)}
.nut-gia{display:block;text-align:center;font-family:var(--tron);font-weight:700;font-size:13px;padding:11px 10px;border-radius:999px;background:var(--be);border:1px solid var(--cat-sau);transition:background .3s,color .3s,border-color .3s}
.nut-gia:hover{background:var(--nau);color:var(--kem);border-color:var(--nau)}
.noi-bat .nut-gia{background:var(--nau);color:var(--kem);border-color:var(--nau)}
.noi-bat .nut-gia:hover{background:var(--cam);border-color:var(--cam)}
.gia-ghi{margin-top:24px;text-align:center;font-size:13px;color:var(--nau-nhat);max-width:56ch;margin-left:auto;margin-right:auto}
.uoc{max-width:660px;margin:28px auto 0;background:var(--kem);border:1px solid var(--cat);border-radius:22px;padding:20px 26px;font-size:14px;color:#5A5147;text-align:center}
.uoc b{color:var(--nau)}

/* ---------- hỏi đáp ---------- */
.hoi-dap{padding:0 0 96px}
.faq{max-width:760px;margin:0 auto}
.faq details{background:var(--kem);border:1px solid var(--cat);border-radius:18px;padding:16px 22px;margin-bottom:12px}
.faq summary{cursor:pointer;font-family:var(--tron);font-weight:700;font-size:15px;list-style:none;display:flex;justify-content:space-between;gap:14px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-weight:400;font-size:20px;color:var(--nau-nhat);flex:none}
.faq details[open] summary::after{content:"−"}
.faq details p{margin-top:8px;color:#5A5147;font-size:14px}
.faq details a{border-bottom:1px solid var(--cat-sau)}

/* ---------- các gói khác ---------- */
.khac{padding:0 0 96px}
.khac-luoi{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.khac-o{display:inline-flex;align-items:baseline;gap:9px;background:var(--kem);border:1px solid var(--cat);border-radius:999px;padding:12px 24px;font-family:var(--tron);font-weight:700;font-size:14px;transition:transform .3s var(--lien),border-color .3s}
.khac-o small{font-weight:400;font-family:var(--sans);color:var(--nau-nhat);font-size:12px}
.khac-o:hover{transform:translateY(-3px);border-color:var(--nau-mo)}

/* ---------- hiện dần ---------- */
.hien{opacity:0;transform:translateY(16px);transition:opacity 1s var(--lien),transform 1s var(--lien)}
.hien.roi{opacity:1;transform:none}

/* ---------- kết / liên hệ ---------- */
.ket{padding:0 0 32px}
.ket-o{background:var(--nau);color:#EDE6DC;border-radius:40px;padding:70px 40px 52px;text-align:center}
.ket-o .nhan{color:#9E9284}
.ket h2{font-family:var(--tron);font-weight:700;font-size:clamp(21px,2.6vw,31px);line-height:1.45;letter-spacing:-.02em;margin:18px auto 16px;max-width:26ch}
.ket .ghi{color:#A79B8B;font-size:14.5px;max-width:42ch;margin:0 auto;display:block}
.ban{list-style:none;max-width:520px;margin:42px auto 0}
.ban li{display:flex;justify-content:space-between;gap:20px;align-items:baseline;padding:13px 0;border-bottom:1px solid rgba(237,230,220,.14);font-size:14px;text-align:left}
.ban li:first-child{border-top:1px solid rgba(237,230,220,.14)}
.ban .k{font-family:var(--tron);font-weight:600;font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:#9E9284;flex:none}
.ban a{border-bottom:1px solid rgba(237,230,220,.3);padding-bottom:2px;transition:border-color .3s}
.ban a:hover{border-bottom-color:#EDE6DC}
.chan{display:flex;justify-content:space-between;gap:20px;padding:26px 12px 0;font-size:11px;color:var(--nau-nhat)}

/* ---------- nút gọi nổi ---------- */
.goi-noi{position:fixed;right:18px;bottom:18px;z-index:50;display:inline-flex;align-items:center;gap:9px;background:var(--nau);color:var(--kem);font-family:var(--tron);font-weight:700;font-size:14px;padding:13px 20px 13px 16px;border-radius:999px;box-shadow:0 14px 30px -10px rgba(69,59,49,.6);transition:transform .3s var(--lien)}
.goi-noi:hover{transform:translateY(-3px)}
.goi-noi .cham{width:9px;height:9px;border-radius:999px;background:#8FB98A;box-shadow:0 0 0 0 rgba(143,185,138,.7);animation:dap 1.8s infinite}
@keyframes dap{0%{box-shadow:0 0 0 0 rgba(143,185,138,.6)}70%{box-shadow:0 0 0 9px rgba(143,185,138,0)}100%{box-shadow:0 0 0 0 rgba(143,185,138,0)}}
.goi-noi small{display:none}

/* ---------- màn nhỏ ---------- */
@media(max-width:900px){
  .hero-goi{padding:112px 0 36px}
  .gia-luoi{grid-template-columns:1fr 1fr;gap:16px;row-gap:22px}
  .tv-luoi{columns:2;column-gap:12px}
  .tv-luoi>a,.tv-luoi>.o-anh{margin-bottom:12px}
  .thu-vien,.bang-gia,.hoi-dap,.khac{padding-bottom:68px}
  .ket-o{border-radius:30px;padding:52px 24px 40px}
}
@media(max-width:560px){
  .khung{padding-left:18px;padding-right:18px}
  .dinh-trong{padding:7px 8px 7px 16px}
  .gia-luoi{grid-template-columns:1fr;row-gap:24px}
  .chan{flex-direction:column;gap:6px;text-align:center;align-items:center}
  .goi-noi small{display:inline}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .hien,.menu-trong a{opacity:1;transform:none}
  html{scroll-behavior:auto}
}