/* ============================================================
   THIỆP CƯỚI QUỲNH ANH & SANG — kiểu dáng dùng chung cho 5 trang

   Dựng theo file Claude Design "Thiệp cưới Quỳnh Anh & Sang".
   Design vẽ trên khung cứng 1024px; ở đây mọi thứ co giãn được
   vì phần lớn khách mở bằng điện thoại.

   Trang nào dùng gì:
     index.html         phong bì mở thiệp
     thiep-moi.html     thiệp chính
     chuyen-tui-minh.html  dòng thời gian
     album.html         lưới ảnh + đèn lồng
     xac-nhan.html      form xác nhận + sổ lưu bút
   ============================================================ */

:root{
  --cream:#E3DAD9;
  --mauve:#895756;
  --mauve-2:#7A4B4A;
  --brown:#824D30;
  --brown-deep:#5E3520;
  --on-dark:#FFE8D6;
  --teal:#335252;
  --olive:#5F5F57;        /* design để #6A6A62, đậm thêm cho đủ tương phản */
  --btn:#8B5C3F;
  --btn-deep:#6F4630;
  --petal:#E8B4AE;
  --paper:#FBF7F5;
  --blush:#F1E9E6;         /* nền sáng thứ hai, xen với --cream */
  --card-solid:#FBF6F3;
  --card:rgba(255,255,255,.55);
  --line:rgba(130,77,48,.3);
  --line-dark:rgba(255,232,214,.45);

  --gutter:clamp(18px,5vw,48px);
  /* Thanh nav nằm trong luồng, nên mọi màn "cao đúng một màn hình" phải trừ
     nó ra. Điện thoại nav xuống hai dòng nên cao hơn. */
  --nav-h:54px;
  /* File design vẽ trên khổ cứng 1024px. Giữ đúng 1024 thì màn hình laptop
     1440+ thừa hai dải trống rất rộng, nên nới ra và phóng cỡ chữ theo. */
  --wrap:1180px;

  --f-script:"Great Vibes","Cormorant Garamond",Georgia,cursive;
  --f-body:"Cormorant Garamond",Georgia,"Times New Roman",serif;
  --f-label:"Be Vietnam Pro","Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;overflow-x:clip}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  background:var(--cream);
  color:var(--brown);
  font-family:var(--f-body);
  font-size:clamp(15px,.5vw + 12.6px,19px);
  line-height:1.62;
}

/* height:auto là bắt buộc — không có nó thì thuộc tính height="..." trên thẻ
   <img> đè lên aspect-ratio và ảnh kéo dài ra đúng chiều cao gốc */
img{max-width:100%;height:auto;display:block}
/* <figure> mặc định có lề 40px hai bên, đủ để đẩy ảnh tràn khỏi màn hình */
figure{margin:0}
::selection{background:var(--mauve);color:var(--on-dark)}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:3px}

a{color:var(--brown)}
a:hover{color:var(--brown-deep)}

.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.band{position:relative;overflow:hidden}
.band--cream{background:var(--cream);color:var(--brown)}
.band--mauve{background:var(--mauve);color:var(--on-dark)}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- Chữ ---------- */
.script{font-family:var(--f-script);font-weight:400;line-height:1.12;margin:0;text-wrap:balance}
.eyebrow{
  font-family:var(--f-label);font-weight:400;
  font-size:clamp(10px,.3vw + 9px,14px);
  letter-spacing:.26em;text-transform:uppercase;margin:0;
}
.page-title{
  font-family:var(--f-script);font-weight:400;
  font-size:clamp(46px,7.5vw,96px);line-height:1.08;
  margin:0;text-align:center;text-wrap:balance;
}
.sec-title{
  font-family:var(--f-script);font-weight:400;
  font-size:clamp(38px,6vw,76px);line-height:1.05;
  margin:0;color:var(--olive);text-align:center;text-wrap:balance;
}
.band--mauve .sec-title{color:var(--on-dark)}

/* ---------- Thanh điều hướng ---------- */
.nav{
  position:sticky;top:0;z-index:40;
  background:color-mix(in srgb, var(--cream) 88%, transparent);
  backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(130,77,48,.14);
}
/* Sáu mục không đủ chỗ trên một dòng ở màn điện thoại. Cho xuống dòng chứ
   đừng cho cuộn ngang — cuộn ngang thì chữ bị cắt cụt mà khách không biết
   là còn mục phía sau. */
.nav-in{
  display:flex;flex-wrap:wrap;justify-content:center;
  gap:4px clamp(12px,3vw,30px);
  padding-block:10px;
}
.nav a{
  position:relative;flex:none;padding:8px 0;
  font-family:var(--f-label);font-size:clamp(10px,.3vw + 9px,14px);
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--brown);text-decoration:none;white-space:nowrap;
}
.nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:currentColor;transform:scaleX(0);transition:transform .35s ease;
}
.nav a:hover::after,.nav a[aria-current="page"]::after{transform:scaleX(1)}
.nav-lang{display:inline-flex;align-items:center;gap:2px;flex:none}
.lang{
  border:0;background:transparent;cursor:pointer;padding:6px 7px;
  font-family:var(--f-label);font-size:clamp(10px,.3vw + 9px,13px);
  letter-spacing:.1em;color:var(--brown);opacity:.55;
  transition:opacity .25s ease;
}
.lang:hover{opacity:1}
.lang[aria-pressed="true"]{opacity:1;text-decoration:underline;text-underline-offset:5px}
.nav-lang::before{
  content:"";width:1px;height:14px;margin-right:6px;
  background:rgba(130,77,48,.3);
}

/* ---------- Hiệu ứng ---------- */
.fu{animation:fu 1.1s cubic-bezier(.2,.7,.2,1) both}
@keyframes fu{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}

.rv,.rl,.rr{transition:opacity 1s ease,transform 1s cubic-bezier(.2,.7,.2,1)}
.armed .rv:not(.in){opacity:0;transform:translateY(28px)}
.armed .rl:not(.in){opacity:0;transform:translateX(-50px)}
.armed .rr:not(.in){opacity:0;transform:translateX(50px)}
.grow{transform-origin:left center;transition:transform 1.2s ease}
.armed .grow:not(.in){transform:scaleX(0)}
.line-v{transform-origin:50% 0;transition:transform 2.4s ease}
.armed .line-v:not(.in){transform:scaleY(0)}
@media (max-width:620px){
  .armed .rl:not(.in),.armed .rr:not(.in){opacity:0;transform:translateY(28px)}
}

.floaty{animation:floaty 6s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.beat{animation:beat 1.6s ease-in-out infinite}
@keyframes beat{0%,100%{transform:scale(1)}15%{transform:scale(1.22)}30%{transform:scale(.96)}45%{transform:scale(1.12)}}
.spin{animation:spin 9s linear infinite}
.spin-slow{animation:spin 40s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.bob{animation:bob 2.4s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(8px)}}
.wob{animation:wob 3.2s ease-in-out infinite;transform-origin:50% 90%}
@keyframes wob{0%,100%{transform:rotate(-6deg)}50%{transform:rotate(6deg)}}
.hop{animation:hop 1.8s ease-in-out infinite}
@keyframes hop{0%,100%{transform:translateY(0)}40%{transform:translateY(-7px)}60%{transform:translateY(0)}}
.swing{animation:swing 5s ease-in-out infinite;transform-origin:50% 4%}
@keyframes swing{0%,100%{transform:rotate(-2.2deg)}50%{transform:rotate(2.2deg)}}
.kb img{animation:kb 20s ease-in-out infinite alternate}
@keyframes kb{from{transform:scale(1)}to{transform:scale(1.1)}}
.pulse{animation:pulse 2.2s ease-out infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(139,92,63,.55)}70%{box-shadow:0 0 0 16px rgba(139,92,63,0)}100%{box-shadow:0 0 0 0 rgba(139,92,63,0)}}
.zoom{overflow:hidden}
.zoom img{transition:transform .7s ease}
.zoom:hover img{transform:scale(1.06)}
.lift{transition:transform .35s ease,box-shadow .35s ease}
.lift:hover{transform:translateY(-6px);box-shadow:0 16px 32px rgba(0,0,0,.28)}

/* Cánh hoa rơi — JS rải, CSS lo phần bay */
.petals{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.petal{
  position:absolute;top:-24px;border-radius:150% 0 150% 0;
  background:var(--petal);animation:fall linear infinite;
}
@keyframes fall{
  0%{transform:translate3d(0,-30px,0) rotate(0deg)}
  50%{transform:translate3d(40px,55vh,0) rotate(260deg)}
  100%{transform:translate3d(-10px,115vh,0) rotate(540deg)}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .armed .rv,.armed .rl,.armed .rr,.armed .grow,.armed .line-v{opacity:1!important;transform:none!important}
}

/* ---------- Nút ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:44px;padding:0 26px;border:0;border-radius:999px;cursor:pointer;
  font-family:var(--f-label);font-weight:500;
  font-size:clamp(11px,.35vw + 9.5px,15px);letter-spacing:.14em;text-transform:uppercase;
  background:var(--btn);color:var(--on-dark);text-decoration:none;
  transition:transform .25s ease,background .25s ease,color .25s ease;
}
.btn:hover{transform:translateY(-2px);background:var(--btn-deep);color:var(--on-dark)}
.btn[disabled]{opacity:.6;cursor:progress;transform:none}
.btn--outline{background:transparent;color:var(--brown);box-shadow:inset 0 0 0 1px var(--line)}
.btn--outline:hover{background:rgba(139,92,63,.1);color:var(--btn-deep)}
.band--mauve .btn--outline{color:var(--on-dark);box-shadow:inset 0 0 0 1px var(--on-dark)}
.band--mauve .btn--outline:hover{background:rgba(255,232,214,.15);color:var(--on-dark)}
.btn--light{background:var(--on-dark);color:var(--mauve)}
.btn--light:hover{background:#fff;color:var(--mauve)}
.btn-mini{
  display:inline-flex;align-items:center;min-height:38px;padding:0 16px;
  border:0;border-radius:999px;cursor:pointer;text-decoration:none;
  font-family:var(--f-label);font-size:11px;letter-spacing:.1em;
  background:transparent;color:var(--brown);box-shadow:inset 0 0 0 1px var(--line);
  transition:background .25s ease,color .25s ease;
}
.btn-mini:hover{background:rgba(139,92,63,.1);color:var(--btn-deep)}
.btn-mini--quiet{box-shadow:none;color:var(--teal);text-decoration:underline;text-underline-offset:4px}

/* ---------- Đếm ngược ---------- */
.count{display:flex;flex-direction:column;align-items:center;gap:10px}
.count-row{display:flex;gap:clamp(8px,2vw,14px)}
.cd{
  width:clamp(56px,7vw,86px);aspect-ratio:1;border-radius:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.4);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  transition:transform .3s ease;
}
.cd:hover{transform:translateY(-3px)}
.cd b{font-weight:400;font-size:clamp(21px,2.6vw,34px);line-height:1.15}
.cd span{font-family:var(--f-label);font-size:clamp(8px,.9vw,12px);letter-spacing:.08em}

/* ---------- Dải kết trang ---------- */
.outro{padding-block:clamp(44px,8vw,64px);text-align:center}
.outro-title{font-family:var(--f-script);font-size:clamp(34px,5vw,64px);line-height:1.15;margin:0}
.outro-links{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:clamp(22px,4vw,32px)}

/* ---------- Nút nhạc nổi ---------- */
.dock{
  position:fixed;right:clamp(12px,3vw,24px);bottom:clamp(12px,3vw,24px);z-index:45;
  display:flex;align-items:center;gap:8px;
}
.dock[hidden]{display:none!important}
.dock-btn{
  width:52px;height:52px;border-radius:50%;border:0;cursor:pointer;
  background:var(--mauve-2);display:grid;place-items:center;
  box-shadow:0 12px 28px -12px rgba(40,20,18,.8);
  transition:transform .25s ease;
}
.dock-btn:hover{transform:scale(1.06)}
.dock-disc{
  width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
  background:repeating-radial-gradient(circle at 50% 50%,#2A1A19 0 1.5px,#45302D 1.5px 3px);
  animation:spin 4s linear infinite;animation-play-state:paused;
}
.is-playing .dock-disc{animation-play-state:running}
.dock-disc::after{content:"";width:11px;height:11px;border-radius:50%;background:var(--on-dark)}

/* ============================================================
   TRANG 0 · PHONG BÌ
   ============================================================ */
.intro{min-height:calc(100svh - var(--nav-h));display:flex;flex-direction:column}
.intro-body{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:clamp(14px,2.2vh,22px);padding-block:clamp(22px,3.5vh,36px);text-align:center;
}
.intro-names{font-size:clamp(38px,5.4vw,70px);color:var(--brown)}

.env{
  position:relative;width:min(520px,86vw);aspect-ratio:460/280;
  /* Lúc đóng thì sát vào, không chừa chỗ thừa. */
  margin-top:clamp(12px,2.5vh,22px);
  transition:margin-top .9s cubic-bezier(.4,.1,.2,1);
  perspective:1200px;animation:shake 3.5s ease-in-out infinite;
  cursor:pointer;
}
@keyframes shake{
  0%,82%,100%{transform:rotate(0)}
  85%{transform:rotate(-2deg)}88%{transform:rotate(2deg)}
  91%{transform:rotate(-1.5deg)}94%{transform:rotate(1deg)}
}
.env-back{position:absolute;inset:0;border-radius:6px;background:var(--mauve-2);box-shadow:0 24px 50px rgba(80,40,30,.28)}
.env-letter{
  position:absolute;left:4.4%;top:5%;width:91.3%;height:89.3%;
  border-radius:4px;overflow:hidden;z-index:2;
  background:var(--paper) url("images/letter-paper.jpg") center/cover no-repeat;
  display:flex;flex-direction:column;align-items:center;gap:6px;
  padding-top:8%;
  transition:transform 1.1s cubic-bezier(.2,.8,.2,1) .55s;
}
/* Mở ra thì nắp lật ngược lên trên, cao bằng 57% chiều cao phong bì tức ~35%
   chiều rộng. Lúc đó mới nhả chỗ, không thì nắp và lá thư đè mất tên hai đứa. */
.env.is-open{margin-top:min(186px,36vw)}
.env.is-open .env-letter{transform:translateY(-46%)}
.env-letter .eyebrow{letter-spacing:.24em}
.env-letter .script{font-size:clamp(26px,4.2vw,50px)}
.env-letter .env-date{font-size:clamp(12px,1.6vw,19px);letter-spacing:.12em}
.env-front,.env-pocket,.env-flap{position:absolute;inset:0;border-radius:6px}
.env-front{z-index:3;background:var(--mauve);clip-path:polygon(0 0,50% 52%,100% 0,100% 100%,0 100%)}
.env-pocket{z-index:3;background:#7D4F4E;clip-path:polygon(0 100%,50% 48%,100% 100%)}
.env-flap{
  height:57%;background:var(--mauve-2);clip-path:polygon(0 0,100% 0,50% 100%);
  transform-origin:50% 0;z-index:4;
  transition:transform .9s cubic-bezier(.4,.1,.2,1),z-index 0s .45s;
}
.env.is-open .env-flap{transform:rotateX(180deg);z-index:1}
.seal{
  position:absolute;left:50%;top:44%;translate:-50% 0;z-index:5;
  width:clamp(58px,9vw,88px);aspect-ratio:1;padding:0;
  border-radius:50%;border:2px solid #A87557;cursor:pointer;
  background:var(--btn);color:var(--on-dark);
  font-family:var(--f-script);font-size:clamp(22px,3.2vw,34px);line-height:1;
  display:flex;align-items:center;justify-content:center;
  animation:pulse 2.2s ease-out infinite;
  transition:transform .5s ease,opacity .5s ease;
}
.seal:hover{transform:translateX(-50%) scale(1.08)}
.env.is-open .seal{transform:translateX(-50%) scale(0);opacity:0;pointer-events:none}
.intro-cue[hidden],.intro-go[hidden]{display:none}

/* ============================================================
   TRANG 1 · THIỆP MỜI
   ============================================================ */
/* Khung đầu vòm dùng cho ảnh mở đầu và ảnh cô dâu, chú rể */
.arch-top{border-radius:999px 999px 0 0;overflow:hidden}
.arch-top img{width:100%;height:100%;object-fit:cover}

/* Khối có tiêu đề ở giữa: nhãn nhỏ, tiêu đề chữ viết tay, rồi tới nội dung */
.sec{padding-block:clamp(48px,7.5vw,92px);text-align:center}
.sec-h{font-size:clamp(40px,5.6vw,70px);margin-top:.12em}
.sec-lead{margin:clamp(8px,1.2vw,14px) auto 0;max-width:62ch;font-size:clamp(14px,1.35vw,18px);line-height:1.6;text-wrap:balance}

/* ----- 1 · Mở đầu ----- */
.hero{
  position:relative;min-height:min(calc(100svh - var(--nav-h)),920px);
  display:flex;flex-direction:column;justify-content:center;
  padding-block:clamp(28px,5vh,56px) clamp(44px,7vh,64px);
}
.hero-in{
  position:relative;display:grid;align-items:center;
  grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:clamp(24px,5vw,72px);
}
.hero-text{display:flex;flex-direction:column;align-items:flex-start;gap:clamp(16px,2.6vh,28px)}
.hero-kicker{display:flex;align-items:center;gap:14px;letter-spacing:.34em}
.hero-kicker::before{content:"";width:40px;height:1px;background:currentColor}
.hero-names{display:flex;flex-direction:column;font-size:clamp(58px,8.6vw,116px);line-height:1.04;color:var(--brown)}
.hero-amp{font-size:.64em;line-height:1;margin-left:1.5em;color:#B07E6F}
.hero-n2{margin-left:.7em}
.hero-date{margin:0;display:flex;flex-direction:column;gap:6px}
.hero-date b{font-weight:400;font-size:clamp(22px,2.9vw,36px);line-height:1.2;color:var(--teal)}
.hero-date .eyebrow{letter-spacing:.24em}

/* Ảnh vòm: rộng theo màn hình nhưng không được cao quá màn đầu */
.hero-art{
  position:relative;justify-self:center;
  width:min(clamp(210px,30vw,400px),calc((100svh - var(--nav-h) - 190px) * .635));
  aspect-ratio:330/520;
}
.hero-arch{position:absolute;inset:0;box-shadow:0 24px 50px rgba(80,40,30,.18)}
.hero-arch img{object-position:center 40%}
.hero-arch-line{
  position:absolute;inset:0;translate:6% 4%;
  border:1px solid rgba(130,77,48,.4);border-radius:999px 999px 0 0;
}
.hero-badge{
  position:absolute;left:-21%;bottom:-3%;width:39.4%;aspect-ratio:1;border-radius:50%;
  background:var(--cream);color:var(--brown);box-shadow:0 10px 26px rgba(80,40,30,.15);
  display:grid;place-items:center;
}
.hero-badge svg{position:absolute;inset:0;width:100%;height:100%}
.hero-badge img{width:20%;height:auto}
.hero-chev{position:absolute;left:50%;bottom:clamp(10px,2vh,18px);margin-left:-13px;color:var(--brown)}
.fl{animation:fl 1.2s cubic-bezier(.2,.7,.2,1) both}
@keyframes fl{from{opacity:0;transform:translateX(40px)}to{opacity:1;transform:none}}

@media (max-width:820px){
  .hero{min-height:0;padding-block:clamp(28px,7vw,48px) clamp(40px,10vw,60px)}
  .hero-in{grid-template-columns:1fr;gap:clamp(34px,9vw,52px)}
  .hero-text{align-items:center;text-align:center}
  .hero-names{align-items:center;font-size:clamp(56px,17vw,96px)}
  .hero-amp,.hero-n2{margin-left:0}
  .hero-date{align-items:center}
  .hero-art{width:min(64vw,290px)}
  .hero-badge{left:-16%}
  .hero-chev{display:none}
}

/* Trượt đúng một nửa rồi lặp — dùng cho dãy ảnh "Khoảnh khắc" */
@keyframes marq{to{transform:translateX(-50%)}}

/* ----- 2 · Lời mời ----- */
/* Vừa khít một màn như màn mở đầu; dấu nháy nằm trong dòng chảy để đi theo tiêu đề khi căn giữa */
.letter{
  min-height:min(calc(100svh - var(--nav-h)),920px);
  display:flex;flex-direction:column;justify-content:center;
  padding-block:clamp(18px,3vw,34px) clamp(48px,7vw,80px);text-align:center;
}
.letter-quote{
  font-size:clamp(96px,13vw,160px);line-height:.86;opacity:.3;pointer-events:none;
  margin-bottom:calc(clamp(46px,6vw,70px) - .86em);
}
.letter .sec-h{position:relative;font-size:clamp(38px,5.2vw,64px)}
.letter-body{max-width:36em;margin:clamp(18px,2.6vw,30px) auto 0;font-size:clamp(15.5px,1.5vw,20px);line-height:1.75}
.letter-body p{margin:0 0 1em}
.letter-body p:last-child{margin-bottom:0}
.letter-rule{display:flex;align-items:center;justify-content:center;gap:14px;margin-top:clamp(26px,4vw,44px)}
.letter-rule span{width:70px;height:1px;background:rgba(255,232,214,.6)}
.letter-sign{margin-top:.3em;font-size:clamp(30px,3.8vw,48px)}
.heart{width:clamp(18px,4vw,27px);height:auto;flex:none}

/* ----- 3 · Cô dâu & chú rể ----- */
.duo{
  display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:start;justify-items:center;
  max-width:860px;margin:clamp(28px,4vw,48px) auto 0;
}
.duo-card{display:grid;justify-items:center;gap:clamp(16px,2vw,24px);width:100%}
.duo-arch{
  width:min(100%,clamp(170px,27vw,330px));aspect-ratio:280/360;
  box-shadow:0 20px 44px rgba(80,40,30,.16);transition:transform .5s ease;
}
.duo-arch:hover{transform:translateY(-8px)}
.duo-card figcaption{display:flex;flex-direction:column;gap:4px;font-size:clamp(13px,1.25vw,16px);line-height:1.5}
.duo-card figcaption .eyebrow{letter-spacing:.3em}
.duo-card figcaption b{font-weight:400;font-size:clamp(20px,2.1vw,27px);line-height:1.35}
.duo-amp{
  align-self:start;width:clamp(56px,13vw,170px);
  margin-top:clamp(64px,12vw,150px);
  font-size:clamp(64px,11.5vw,140px);line-height:1;color:#C4998E;
}
.duo-more{display:grid;justify-items:center;gap:clamp(14px,2vw,20px);margin-top:clamp(34px,5vw,60px)}
.duo-more p{margin:0;max-width:46ch;font-size:clamp(14.5px,1.4vw,18px);line-height:1.6;text-wrap:balance}
@media (max-width:620px){
  .duo{grid-template-columns:1fr;gap:6px}
  .duo-arch{width:min(70vw,260px)}
  .duo-amp{margin:0;width:auto;font-size:72px;align-self:center}
}

/* ----- 4 · Hai ngày vui + dress code ----- */
.band--blush{background:var(--blush);color:var(--brown)}
.days{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(18px,3.6vw,44px);
  max-width:940px;margin:clamp(28px,4vw,48px) auto 0;
}
@media (max-width:680px){.days{grid-template-columns:1fr;max-width:440px}}
.day{
  display:flex;flex-direction:column;align-items:center;
  padding:clamp(26px,3.4vw,42px) clamp(20px,3.2vw,40px);border-radius:16px;
  background:var(--card-solid);border:1px solid rgba(130,77,48,.16);
  box-shadow:0 14px 34px rgba(80,40,30,.08);
  /* gộp cả hiện dần lẫn nhấc lên khi rê chuột — .rv đã chiếm transition */
  transition:opacity 1s ease,transform .6s cubic-bezier(.2,.7,.2,1),box-shadow .4s ease;
}
.day.in:hover{transform:translateY(-8px);box-shadow:0 26px 52px rgba(80,40,30,.18)}
:where(.day,.dress,.ticket,.finale) p{margin:0}
.day .eyebrow{letter-spacing:.26em}
.day-num{font-size:clamp(68px,8vw,100px);line-height:1.08;color:var(--teal)}
.day-title{font-size:clamp(34px,4.1vw,50px);margin-top:.35em}
.day-time{font-size:clamp(15px,1.5vw,19px)}
.day-lunar{font-size:clamp(12.5px,1.15vw,15px);opacity:.85}
.day-venues,.day-note{margin-block:clamp(14px,1.8vw,22px) clamp(22px,3vw,34px)}
.day-venues{
  width:100%;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;font-size:clamp(12.5px,1.15vw,15px);line-height:1.5;
}
.day-venues b{display:block;font-weight:400;font-size:10.5px;letter-spacing:.2em;margin-bottom:4px}
.day-note{font-size:clamp(14px,1.35vw,17px);line-height:1.55}
/* margin-top:auto dồn nút xuống đáy, hai thẻ cao bằng nhau thì hai nút thẳng hàng */
.day-cal{margin-top:auto;font-size:clamp(11px,.3vw + 9.5px,13px);letter-spacing:.18em}
.dress{max-width:660px;margin:clamp(40px,6vw,64px) auto 0}
.dress-title{font-size:clamp(36px,4.6vw,56px)}
.dress-lead{font-size:clamp(14px,1.4vw,18px);letter-spacing:.1em}
.dress-note{margin-top:.4em;font-size:clamp(13.5px,1.3vw,17px);line-height:1.6;text-wrap:balance}

/* ----- 5 · Khoảnh khắc ----- */
.moments{padding-block:clamp(44px,6vw,72px) clamp(28px,4vw,44px)}
.sec-top{text-align:center}
.moments-link{display:inline-block;margin-top:.9em;padding-block:6px;letter-spacing:.24em;text-underline-offset:4px}
/* Chưa có JS (hoặc khách tắt chuyển động) thì đây là một dãy ảnh vuốt ngang */
.strip{margin-top:clamp(18px,3vw,30px);overflow-x:auto;padding-block:10px 24px;scrollbar-width:none}
.strip::-webkit-scrollbar{display:none}
.strip-run{display:flex;width:max-content;padding-left:16px}
.strip figure{
  flex:none;width:clamp(150px,20vw,240px);aspect-ratio:3/4;margin-right:16px;
  border-radius:8px;overflow:hidden;
  transition:transform .5s ease,box-shadow .5s ease;
}
.strip figure:nth-child(even){margin-top:28px}
.strip figure:hover{transform:translateY(-8px) rotate(-1deg);box-shadow:0 18px 36px rgba(80,40,30,.25)}
.strip img{width:100%;height:100%;object-fit:cover}
.strip.is-looping{overflow:hidden}
.strip.is-looping .strip-run{padding-left:0;animation:marq 60s linear infinite}
.strip.is-looping:hover .strip-run{animation-play-state:paused}

/* ----- 6 · Timeline + đĩa nhạc ----- */
.tl-wrap{
  padding-block:clamp(48px,7.5vw,92px);
  display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1fr);
  gap:clamp(28px,7vw,96px);align-items:center;
}
@media (max-width:760px){.tl-wrap{grid-template-columns:1fr;gap:44px}}
.deck-col{display:flex;flex-direction:column;align-items:center;gap:14px}
.deck{position:relative;width:min(clamp(220px,30vw,360px),74vw);aspect-ratio:1;margin-bottom:8px}
.deck-disc{
  position:absolute;inset:3%;border-radius:50%;
  background:repeating-radial-gradient(circle,#1B1312 0 2px,#261B1A 2px 4px);
  box-shadow:0 24px 50px rgba(0,0,0,.35);
  animation:spin 6s linear infinite;animation-play-state:paused;
}
.deck-disc::after{
  content:"";position:absolute;left:50%;top:50%;width:10px;height:10px;margin:-5px;
  border-radius:50%;background:var(--cream);
}
.deck-label{position:absolute;inset:30%;border-radius:50%;overflow:hidden;border:3px solid var(--on-dark)}
.deck-label img{width:100%;height:100%;object-fit:cover}
.deck-pivot{position:absolute;left:88%;top:-2%;width:8%;aspect-ratio:1;border-radius:50%;background:#D9C3B8}
/* Kim nhấc ra ngoài lúc nhạc tắt, hạ vào đĩa lúc nhạc chạy */
.deck-arm{
  position:absolute;left:91%;top:.6%;width:2%;height:53%;border-radius:3px;background:#D9C3B8;
  transform-origin:50% 7%;transform:rotate(4deg);transition:transform .8s ease;
}
.deck.is-playing .deck-disc{animation-play-state:running}
.deck.is-playing .deck-arm{animation:arm 6s ease-in-out .8s infinite;transform:rotate(24deg)}
@keyframes arm{0%,100%{transform:rotate(24deg)}50%{transform:rotate(27deg)}}
.player-hit{position:absolute;inset:0;border:0;border-radius:50%;background:transparent;cursor:pointer}
.deck-name{font-size:clamp(30px,3.4vw,44px);color:var(--on-dark)}
.tl-h{text-align:left;font-size:clamp(38px,5vw,62px);margin-bottom:.45em}
.timeline{list-style:none;margin:0;padding:0;border-bottom:1px solid rgba(255,232,214,.3)}
.timeline li{
  display:flex;align-items:center;gap:clamp(12px,2vw,22px);
  min-height:clamp(104px,11vw,128px);padding-block:16px;
  border-top:1px solid rgba(255,232,214,.3);
}
.timeline p,.timeline h3{margin:0}
.tl-time{flex:none;width:clamp(64px,8vw,100px);font-size:clamp(21px,2.4vw,30px);line-height:1.15}
.tl-text{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.tl-when{font-family:var(--f-label);font-size:clamp(10px,.85vw,12px);letter-spacing:.2em}
.tl-what{font-family:var(--f-body);font-weight:400;font-size:clamp(18px,1.8vw,23px);line-height:1.25}
.tl-note{font-size:clamp(12.5px,1.15vw,15px);line-height:1.45;opacity:.9}
.tl-art{flex:none;width:clamp(48px,5.6vw,70px);height:auto}
.tl-art--tall{width:clamp(34px,3.8vw,48px);margin-inline:clamp(7px,.9vw,11px)}

/* ----- 7 · Xác nhận + đường về nhà ----- */
.reply{
  padding-block:clamp(48px,7.5vw,92px);
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:clamp(28px,5.5vw,68px);align-items:stretch;
}
@media (max-width:760px){.reply{grid-template-columns:1fr;gap:48px}}
/* Cái vé dựng bằng CSS chứ không dùng ảnh PNG kéo giãn: ảnh vé có tỉ lệ cố
   định, ép nó vừa khung chữ co giãn thì méo. */
.ticket{
  --tp:clamp(22px,3.6vw,42px);
  display:flex;flex-direction:column;align-items:center;gap:12px;
  width:100%;max-width:460px;justify-self:center;
  padding:clamp(30px,4vw,46px) var(--tp);
  background:var(--card-solid);border:1px solid rgba(130,77,48,.16);border-radius:16px;
  box-shadow:0 14px 34px rgba(80,40,30,.1);text-align:center;
}
.ticket-kicker{letter-spacing:.4em}
.ticket-title{font-size:clamp(36px,4.4vw,54px)}
.ticket-body{
  position:relative;flex:1;width:100%;
  display:flex;flex-direction:column;align-items:center;gap:14px;
  margin-top:8px;padding-top:clamp(20px,2.6vw,28px);
  border-top:1.5px dashed rgba(130,77,48,.35);
}
/* Hai vết khuyết hai bên, neo vào đúng đường răng cưa nên không lệch khi
   cỡ chữ đổi theo màn hình */
.ticket-body::before,.ticket-body::after{
  content:"";position:absolute;top:-15px;
  width:28px;height:28px;border-radius:50%;background:var(--cream);
}
.ticket-body::before{left:calc(-1 * var(--tp) - 15px)}
.ticket-body::after{right:calc(-1 * var(--tp) - 15px)}
.ticket-note{font-size:clamp(14.5px,1.4vw,18px);line-height:1.6}
.ticket-date{margin-bottom:clamp(10px,2vw,22px);font-size:clamp(23px,2.6vw,31px);line-height:1.25;color:var(--teal)}
.ticket .btn{margin-top:auto;min-height:50px;padding-inline:30px}
.ticket-sheet{font-size:clamp(12px,1.05vw,14px);text-underline-offset:3px;padding-block:4px}
.sheet-link{display:block;margin:clamp(20px,4vw,30px) auto 0;text-align:center;font-size:clamp(11px,1.1vw,15px)}

.way{display:flex;flex-direction:column}
.way-title{font-size:clamp(36px,4.4vw,54px);margin-bottom:.4em}
.mapc{
  position:relative;flex:1;display:flex;flex-direction:column;justify-content:space-between;gap:30px;
  min-height:clamp(160px,17vw,210px);padding:clamp(20px,2.2vw,28px);
  border-radius:14px;overflow:hidden;text-decoration:none;color:var(--brown);
  background:
    repeating-linear-gradient(0deg,rgba(130,77,48,.08) 0 1px,transparent 1px 28px),
    repeating-linear-gradient(90deg,rgba(130,77,48,.08) 0 1px,transparent 1px 28px),
    var(--blush);
  border:1px solid rgba(130,77,48,.16);
  transition:opacity 1s ease,transform .5s cubic-bezier(.2,.7,.2,1),box-shadow .35s ease;
}
.mapc + .mapc{margin-top:clamp(16px,2.2vw,24px)}
.mapc.in:hover{transform:translateY(-5px);box-shadow:0 18px 36px rgba(80,40,30,.18);color:var(--brown)}
.mapc-road{position:absolute;left:-5%;top:58%;width:110%;height:10px;background:rgba(255,255,255,.75);rotate:-8deg}
.mapc--b .mapc-road{top:53%;rotate:6deg}
.mapc-pin{position:absolute;right:17%;top:25%;color:#A3322A;animation:pin 1.6s ease-in-out infinite}
.mapc--b .mapc-pin{right:14%;top:29%;animation-delay:-.8s}
@keyframes pin{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.mapc-text{position:relative;display:flex;flex-direction:column;gap:6px;max-width:62%;font-size:clamp(14px,1.35vw,17px);line-height:1.5}
.mapc-text b{font-weight:400;letter-spacing:.26em}
.mapc-cue{position:relative;display:flex;align-items:center;gap:6px;letter-spacing:.2em}

/* ----- 8 · Hẹn gặp nhé ----- */
/* Đáy chừa đủ chỗ cho nút nhạc nổi, không thì nó đè lên dòng cảm ơn */
.finale{padding-block:clamp(52px,7vw,84px) max(clamp(36px,5vw,56px),92px);display:grid;justify-items:center;text-align:center}
.polaroid{position:relative;width:min(clamp(220px,24vw,290px),70vw)}
.polaroid-in{padding:5.8% 5.8% 0;background:#FFFDFB;box-shadow:0 16px 34px rgba(80,40,30,.18);rotate:-2deg}
.polaroid img{width:100%;aspect-ratio:1;object-fit:cover}
.polaroid p{padding-block:.55em .65em;font-size:clamp(24px,2.6vw,31px);color:var(--brown)}
.polaroid::before{
  content:"";position:absolute;z-index:1;left:50%;top:-14px;translate:-50% 0;
  width:35%;height:26px;background:rgba(205,178,148,.82);rotate:-4deg;
}
.finale-head{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:clamp(24px,3.4vw,40px)}
.finale-head .script{font-size:clamp(52px,8vw,100px);color:var(--btn)}
.finale-head .heart{margin-top:.6em}
.finale-dates{font-size:clamp(18px,2.2vw,27px);letter-spacing:.1em;color:var(--teal)}
.finale-tel{display:flex;flex-wrap:wrap;justify-content:center;gap:4px clamp(18px,3vw,32px);margin-top:clamp(16px,2.4vw,26px);font-size:clamp(14px,1.3vw,17px)}
.finale-tel a{display:inline-flex;align-items:center;gap:8px;min-height:44px;text-decoration:none}
.finale-note{margin-top:clamp(18px,2.6vw,30px);font-size:clamp(12.5px,1.15vw,15px);line-height:1.6}

/* ============================================================
   TRANG 2 · CHUYỆN TỤI MÌNH
   ============================================================ */
.story-head{padding-block:clamp(36px,7vw,60px) clamp(28px,5vw,44px);text-align:center}
.story-lead{margin:clamp(16px,3vw,24px) auto 0;max-width:62ch;font-size:clamp(14px,1.35vw,19px);line-height:1.65;text-wrap:balance}
.stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(6px,2vw,24px);
  margin-top:clamp(26px,5vw,42px);padding:0;list-style:none;
}
.stats li{
  min-height:clamp(96px,13vw,172px);border-radius:10px;
  background:var(--card);border:1px solid rgba(130,77,48,.2);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  transition:transform .35s ease;
}
.stats li:hover{transform:translateY(-4px)}
.stats b{font-weight:400;font-size:clamp(24px,5.5vw,70px);line-height:1.08}
.stats span{font-family:var(--f-label);font-size:clamp(9px,1vw,13px);letter-spacing:clamp(.04em,.5vw - 1px,.2em);text-align:center;padding-inline:clamp(4px,1vw,8px);text-wrap:balance}

.story{position:relative;padding-block:clamp(30px,6vw,50px) clamp(44px,8vw,70px)}
.story-line{
  position:absolute;left:50%;top:0;bottom:0;width:1px;
  background:#B58F80;translate:-.5px 0;
}
.story-step{
  position:relative;display:grid;grid-template-columns:1fr 60px 1fr;
  align-items:center;gap:0;
  padding-block:clamp(18px,3.4vw,30px);
}
.story-step > *:first-child{grid-column:1;justify-self:end;text-align:right}
.story-step > *:last-child{grid-column:3;justify-self:start;text-align:left}
.story-dot{
  grid-column:2;justify-self:center;width:13px;height:13px;border-radius:50%;
  background:var(--brown);animation:ring 2.4s ease-out infinite;
}
@keyframes ring{
  0%{box-shadow:0 0 0 0 rgba(130,77,48,.45)}
  70%{box-shadow:0 0 0 12px rgba(130,77,48,0)}
  100%{box-shadow:0 0 0 0 rgba(130,77,48,0)}
}
.story-text{display:flex;flex-direction:column;gap:8px;max-width:400px}
.story-step > .story-text:first-child{align-items:flex-end}
.story-year{font-family:var(--f-script);font-size:clamp(26px,3.6vw,46px);line-height:1.1}
.story-what{font-size:clamp(18px,2vw,28px);line-height:1.25}
.story-how{font-size:clamp(12.5px,1.15vw,16px);line-height:1.65}
.story-media{max-width:400px;width:100%}
.story-media img{width:100%;aspect-ratio:400/270;object-fit:cover;border-radius:6px;box-shadow:0 14px 34px rgba(80,40,30,.2)}
.story-media--round img{aspect-ratio:1;border-radius:50%}
.story-pair{display:flex;align-items:center;justify-content:center}
.story-pair img{
  width:clamp(104px,14vw,200px);aspect-ratio:1;border-radius:50%;object-fit:cover;object-position:50% 30%;
  border:4px solid #F3E9E4;box-shadow:0 12px 28px rgba(80,40,30,.2);
}
.story-pair img:first-child{margin-right:-26px;position:relative;z-index:1}
@media (max-width:720px){
  .story-line{left:14px;translate:0 0}
  .story-step{grid-template-columns:34px 1fr;gap:12px;padding-block:16px}
  .story-step > *:first-child,.story-step > *:last-child{
    grid-column:2;justify-self:stretch;text-align:left;max-width:none;
  }
  .story-step > .story-text:first-child{align-items:flex-start}
  .story-dot{grid-column:1;grid-row:1;justify-self:center;align-self:start;margin-top:10px}
  .story-step > *:last-child{grid-row:2}
  .story-pair{justify-content:flex-start}
}

/* ============================================================
   TRANG 3 · ALBUM
   ============================================================ */
.grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  grid-auto-rows:clamp(130px,19vw,310px);grid-auto-flow:dense;
  gap:clamp(8px,1.8vw,16px);margin-top:clamp(24px,4.5vw,38px);padding:0;list-style:none;
}
@media (max-width:620px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.grid .wide{grid-column:span 2}
.grid .tall{grid-row:span 2}
.tile{
  position:relative;width:100%;height:100%;padding:0;border:0;
  overflow:hidden;border-radius:8px;background:#D5C7C4;cursor:zoom-in;
  animation:pop .7s cubic-bezier(.2,.7,.2,1) both;
}
@keyframes pop{from{opacity:0;transform:scale(.94)}to{opacity:1;transform:none}}
.tile img{width:100%;height:100%;object-fit:cover;transition:transform .9s ease}
.tile:hover img{transform:scale(1.08)}
.tile-cap{
  position:absolute;left:0;right:0;bottom:0;padding:14px 18px;
  background:rgba(60,30,25,.72);color:var(--on-dark);
  font-family:var(--f-label);font-size:clamp(12px,1vw,15px);letter-spacing:.06em;text-align:left;
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  transform:translateY(100%);transition:transform .45s ease;
}
.tile:hover .tile-cap,.tile:focus-visible .tile-cap{transform:none}
.lightbox{
  position:fixed;inset:0;z-index:60;border:0;padding:0;
  width:100%;height:100%;max-width:none;max-height:none;
  background:rgba(32,16,14,.94);color:var(--on-dark);
}
.lightbox::backdrop{background:rgba(32,16,14,.94)}
.lb-in{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:clamp(60px,10vw,80px) clamp(16px,5vw,80px)}
.lb-in img{max-width:100%;max-height:78vh;width:auto;height:auto;border-radius:6px;box-shadow:0 30px 60px rgba(0,0,0,.4)}
.lb-cap{font-size:14px;letter-spacing:.08em;text-align:center}
.ib{
  position:absolute;width:48px;height:48px;border-radius:50%;cursor:pointer;
  border:1px solid rgba(255,232,214,.5);background:transparent;color:var(--on-dark);
  display:flex;align-items:center;justify-content:center;transition:background .25s ease;
}
.ib:hover{background:rgba(255,232,214,.22)}
.ib--close{right:clamp(12px,4vw,24px);top:clamp(12px,4vw,24px)}
.ib--prev{left:clamp(8px,3vw,24px);top:calc(50% - 24px)}
.ib--next{right:clamp(8px,3vw,24px);top:calc(50% - 24px)}

/* ============================================================
   TRANG 4 · XÁC NHẬN + SỔ LƯU BÚT
   ============================================================ */
.form-card{
  width:min(680px,100%);margin:clamp(26px,5vw,42px) auto 0;
  padding:clamp(22px,5vw,40px);border-radius:14px;
  background:var(--card);border:1px solid rgba(130,77,48,.18);
  box-shadow:0 20px 50px rgba(80,40,30,.12);
}
.rs-form{display:flex;flex-direction:column;gap:clamp(16px,3vw,20px)}
.rs-form.is-bad{animation:shakeX .45s ease}
@keyframes shakeX{0%,100%{transform:none}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
.field{display:flex;flex-direction:column;gap:8px}
.field > label,.field > .lbl{font-family:var(--f-label);font-size:clamp(11.5px,.9vw,14px);letter-spacing:.14em;text-transform:uppercase}
.inp{
  width:100%;min-height:46px;padding:11px 16px;border-radius:10px;
  border:1px solid rgba(130,77,48,.35);background:var(--paper);
  color:var(--brown-deep);font-family:var(--f-body);font-size:clamp(16px,1.2vw,18px);
  transition:border-color .25s ease,box-shadow .25s ease;
}
textarea.inp{min-height:92px;line-height:1.5;resize:vertical}
.inp:focus{outline:none;border-color:var(--brown);box-shadow:0 0 0 3px rgba(130,77,48,.15)}
.err{font-size:12.5px;color:#A3322A;margin:0}
.err[hidden]{display:none}
.pills{display:flex;gap:10px}
.pill{
  flex:1;min-height:44px;border-radius:22px;cursor:pointer;
  border:1px solid rgba(130,77,48,.35);background:transparent;color:var(--brown);
  font-family:var(--f-body);font-size:clamp(14px,1.15vw,17px);
  transition:background .25s ease,color .25s ease,border-color .25s ease;
}
.pill:hover{border-color:var(--brown)}
.pill[aria-pressed="true"]{background:var(--brown);color:var(--on-dark);border-color:var(--brown)}
.opts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
@media (max-width:520px){.opts{grid-template-columns:1fr}}
.opt{
  min-height:66px;padding:10px;border-radius:10px;cursor:pointer;
  border:1px solid rgba(130,77,48,.35);background:transparent;color:var(--brown);
  font-family:var(--f-body);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:background .25s ease,color .25s ease,border-color .25s ease;
}
.opt:hover{border-color:var(--brown)}
.opt[aria-pressed="true"]{background:var(--brown);color:var(--on-dark);border-color:var(--brown)}
.opt b{font-weight:400;font-size:clamp(13.5px,1.15vw,17px)}
.opt span{font-size:clamp(11.5px,.95vw,14px);opacity:.85}
.count-row-2{display:flex;flex-direction:row;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.stepper{display:flex;align-items:center;gap:4px;border:1px solid rgba(130,77,48,.35);border-radius:23px;padding:0 1px}
.stepper button{
  width:44px;height:44px;border-radius:50%;border:0;cursor:pointer;
  background:transparent;color:var(--brown);font-size:20px;font-family:var(--f-body);
  transition:background .25s ease;
}
.stepper button:hover{background:rgba(130,77,48,.12)}
.stepper output{width:36px;text-align:center;font-size:18px}
.rs-send{min-height:50px;width:100%;letter-spacing:.16em}
.rs-status{margin:0;text-align:center;font-family:var(--f-label);font-size:11.5px;min-height:1.2em}

.thanks{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:16px;text-align:center;min-height:clamp(320px,50vw,540px);position:relative;
}
.thanks[hidden]{display:none}
.check circle{stroke-dasharray:190;stroke-dashoffset:190;animation:draw 1s ease forwards}
.check path{stroke-dasharray:60;stroke-dashoffset:60;animation:draw .6s ease .8s forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.thanks-name{font-family:var(--f-script);font-size:clamp(34px,5vw,64px);line-height:1.15;margin:0}
.thanks-sum{margin:0;max-width:48ch;font-size:clamp(14px,1.35vw,19px);line-height:1.65}
.burst{position:absolute;left:50%;top:40px;animation:burst 1.6s ease-out both;pointer-events:none}
@keyframes burst{
  0%{opacity:0;transform:translate(0,0) scale(.4)}
  20%{opacity:1}
  100%{opacity:0;transform:translate(var(--x),var(--y)) scale(1) rotate(30deg)}
}
.b1{--x:-150px;--y:-40px}
.b2{--x:140px;--y:-60px;animation-delay:.1s}
.b3{--x:-110px;--y:110px;animation-delay:.2s}
.b4{--x:170px;--y:90px;animation-delay:.15s}
.b5{--x:30px;--y:-100px;animation-delay:.05s}

.guestbook{padding-block:clamp(40px,7.5vw,62px);text-align:center}
.wishes{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;
  margin-top:clamp(24px,4.5vw,38px);padding:0;list-style:none;text-align:left;
}
@media (max-width:760px){.wishes{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.wishes{grid-template-columns:1fr}}
.wishes li{
  min-height:120px;padding:18px 20px;border-radius:12px;
  background:#F6ECE7;color:var(--brown-deep);
  display:flex;flex-direction:column;gap:10px;
  box-shadow:0 10px 24px rgba(40,15,10,.2);
  animation:fu .7s cubic-bezier(.2,.7,.2,1) both;
  transition:transform .3s ease;
}
.wishes li:hover{transform:translateY(-4px) rotate(-.5deg)}
.wish-text{margin:0;font-size:clamp(14px,1.15vw,17px);line-height:1.55}
.wish-who{margin:0;font-family:var(--f-script);font-size:clamp(24px,2vw,30px);line-height:1.1;color:var(--brown)}
.wish-empty{
  margin:clamp(24px,4.5vw,38px) auto 0;max-width:500px;min-height:200px;
  border-radius:14px;border:1px dashed var(--line-dark);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:24px;font-size:clamp(15px,1.3vw,19px);line-height:1.55;
}
.wish-empty[hidden]{display:none}
.feather{animation:float 4s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0) rotate(-4deg)}50%{transform:translateY(-8px) rotate(4deg)}}

/* Điện thoại: nav xuống hai dòng */
@media (max-width:820px){
  :root{--nav-h:78px}
}

/* Màn hình thấp (laptop 13" cao 864px, hoặc điện thoại xoay ngang): co trang
   phong bì lại cho vừa đúng một màn, khỏi phải cuộn mới thấy nút mở thiệp. */
@media (min-width:821px) and (max-height:880px){
  .intro-body{gap:clamp(10px,1.6vh,16px);padding-block:clamp(14px,2vh,22px)}
  .intro-names{font-size:clamp(38px,4.2vw,56px)}
  .env{width:min(430px,86vw)}
  .cd{width:clamp(50px,5vw,68px)}
  .cd b{font-size:clamp(19px,2vw,26px)}
  .hero-names{font-size:clamp(58px,7vw,92px)}
  .hero-text{gap:clamp(12px,2vh,20px)}
}

/* Điện thoại màn nhỏ/cũ (cao 640px) — co thêm nữa */
@media (max-width:820px) and (max-height:700px){
  .intro-body{gap:10px;padding-block:14px}
  .intro-names{font-size:clamp(32px,8vw,44px)}
  .env{width:min(300px,82vw)}
  .cd{width:clamp(46px,12vw,56px)}
  .cd b{font-size:clamp(18px,4vw,22px)}
}