/* Thiệp cưới Ngọc Nhi & Minh Hưng · hướng C "Giống thiệp giấy" (từ mockups/invite.html) */

:root{
  --bg:#ecebe8; --paper:#fbfbf9; --ink:#1b1b1b; --muted:#5c5c5c; --line:#1b1b1b; --soft:#f2f1ee;
  --f-serif:"Playfair Display",Georgia,serif; --f-body:"Be Vietnam Pro",system-ui,sans-serif; --f-script:"Great Vibes",cursive;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:15px;font-weight:400;line-height:1.65;-webkit-font-smoothing:antialiased}
.page{max-width:460px;margin:0 auto;background:var(--paper);min-height:100vh;overflow:hidden}
img{display:block;width:100%;height:100%;object-fit:cover}
button{font:inherit;color:inherit}
section{padding:72px 24px;text-align:center}
.label{font-family:var(--f-serif);font-weight:500;font-size:13px;letter-spacing:.16em;text-transform:uppercase}
.script{font-family:var(--f-script);font-weight:400;line-height:1.1}
.muted{color:var(--muted)}
.rule{width:56px;height:1px;background:var(--line);margin:24px auto;opacity:.5}
.lead{font-size:15px;color:var(--muted);max-width:320px;margin:12px auto 0}

/* Nút */
p,.of,.addr,.lead{text-wrap:balance}
.bigdate,.timeline .t,.count b,.acct b,.hero .date,.stepper output{font-variant-numeric:lining-nums}
.btn{color:var(--ink);display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 26px;border:1px solid var(--line);background:transparent;text-decoration:none;font-size:13px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;cursor:pointer}
.btn.solid{background:var(--ink);color:var(--paper)}
.btn svg{width:18px;height:18px}
.btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:28px}
.btns.stack{flex-direction:column;max-width:360px;margin-left:auto;margin-right:auto}
.btns.stack .btn{width:100%}

/* ---------- Phong bì ---------- */
.env{position:fixed;inset:0;z-index:50;background:#f4f3f0;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;padding-bottom:15vh;perspective:1400px;cursor:pointer;transition:opacity .8s .9s, visibility 0s 1.7s}
.env::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(to top right, transparent 49.7%, rgba(0,0,0,.07) 50%, transparent 50.4%),
             linear-gradient(to top left, transparent 49.7%, rgba(0,0,0,.07) 50%, transparent 50.4%)}
.flap{position:absolute;top:0;left:0;right:0;height:52%;background:#e8e7e3;clip-path:polygon(0 0,100% 0,50% 100%);transform-origin:top;transition:transform 1s cubic-bezier(.6,0,.3,1);z-index:2}
.seal{position:absolute;top:52%;left:50%;width:92px;height:92px;margin:-46px 0 0 -46px;border-radius:50%;background:#262626;color:#f2f2f2;display:grid;place-items:center;z-index:3;
  box-shadow:0 8px 22px rgba(0,0,0,.28), inset 0 0 0 6px rgba(255,255,255,.06), inset 0 0 0 7px rgba(0,0,0,.4);transition:transform .5s, opacity .4s}
.seal svg{width:50px;height:50px}
.env-text{position:relative;z-index:1;text-align:center}
.env-text .who{font-family:var(--f-script);font-size:44px;line-height:1.2;margin:8px 0 18px}
.env-text .tap{font-size:13px;font-weight:500;letter-spacing:.22em;text-transform:uppercase;color:var(--muted);animation:pulse 2.2s infinite}
@keyframes pulse{50%{opacity:.5}}
.env.open .flap{transform:rotateX(180deg)}
.env.open .seal{transform:scale(.6);opacity:0}
.env.open{opacity:0;visibility:hidden}

/* ---------- Ảnh bìa ---------- */
.hero{padding:44px 24px 40px}
.arch{position:relative;overflow:hidden;border-radius:999px 999px 0 0}
.hero .arch{height:70vh;max-height:600px}
.hero .names{font-family:var(--f-script);font-size:54px;line-height:1.05;margin-top:26px}
.hero .names span{display:block;font-size:36px;margin:-6px 0}
.hero .date{margin-top:16px;font-family:var(--f-serif);font-size:16px;font-weight:500;letter-spacing:.28em}

/* ---------- Lời mời (khung viền đôi như thiệp in) ---------- */
.framebox{padding:44px 20px;outline:1px solid var(--line);box-shadow:inset 0 0 0 6px var(--paper), inset 0 0 0 7px var(--line)}
.family{line-height:1.6}
.family .label{display:block;margin-bottom:8px}
.family b{display:block;font-weight:600;font-size:16px}
.family .addr{display:block;margin-top:4px;font-size:14px;color:var(--muted)}
.family + .family{margin-top:26px}
.couple{margin:32px 0 6px}
.couple .n{font-family:var(--f-script);font-size:48px;line-height:1.15}
.ornament{width:120px;height:34px;margin:2px auto;color:var(--ink)}

/* ---------- Cô dâu & chú rể ---------- */
.people{display:grid;gap:44px;margin-top:34px}
.person .arch{aspect-ratio:3/4;max-width:300px;margin:0 auto}
.person .role{margin-top:20px}
.person .nm{font-family:var(--f-script);font-size:42px;line-height:1.2;margin-top:4px}
.person .of{font-size:14px;color:var(--muted);margin-top:4px}

/* ---------- Thời gian & địa điểm ---------- */
.when{background:var(--soft)}
.bigdate{display:flex;align-items:center;justify-content:center;gap:16px;font-family:var(--f-serif);margin:20px 0 8px}
.bigdate .d{font-size:64px;line-height:1;font-weight:500}
.bigdate .side{font-size:13px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;padding:7px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);min-width:96px}
.venue{font-family:var(--f-serif);font-size:30px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;margin:6px 0}
/* ---------- Chương trình: timeline zig-zag với đường lượn sóng ở giữa ---------- */
.prog{list-style:none;position:relative;max-width:360px;margin:30px auto 0;padding:10px 0}
.prog::before{content:"";position:absolute;top:0;bottom:0;left:50%;width:16px;margin-left:-8px;opacity:.55;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='40'%3E%3Cpath d='M8 0c7 10 7 10 0 20s-7 10 0 20' fill='none' stroke='%231b1b1b' stroke-width='1.3'/%3E%3C/svg%3E") repeat-y center top}
.prog li{position:relative;width:50%;padding:18px 22px 26px;text-align:center}
.prog li.r{margin-left:50%}
.prog li + li{margin-top:-6px}
.prog li::after{content:"";position:absolute;top:44px;width:14px;height:14px;border-radius:50%;background:var(--ink);box-shadow:0 0 0 6px rgba(27,27,27,.12)}
.prog li.l::after{right:-7px}
.prog li.r::after{left:-7px}
.prog .t{font-family:var(--f-serif);font-size:30px;font-weight:600;line-height:1.1;font-variant-numeric:lining-nums}
.prog .what{font-family:var(--f-serif);font-size:19px;font-weight:500;margin-top:6px;white-space:nowrap}
.prog .what::before,.prog .what::after{content:"◆";font-size:8px;vertical-align:middle;margin:0 7px;opacity:.6}
.prog .where{font-size:14px;color:var(--muted)}
.prog .ic{width:46px;height:46px;margin:12px auto 0;color:var(--ink)}
@media (max-width:420px){
  .prog li{padding:18px 12px 26px}
  .prog .what{font-size:18px}
  .prog .what::before,.prog .what::after{display:none}
}
.booth{max-width:340px;margin:36px auto 0;padding:24px 20px;border:1px solid var(--line)}
.booth svg{width:34px;height:34px;margin:0 auto 10px}
.booth p{font-family:var(--f-serif);font-style:italic;font-size:17px;line-height:1.6}
.booth b{font-weight:600}

/* ---------- Lịch & đếm ngược ---------- */
.cal{max-width:320px;margin:20px auto 0;display:grid;grid-template-columns:repeat(7,1fr);row-gap:10px;font-size:15px}
.cal .h{font-size:12px;font-weight:500;letter-spacing:.06em;color:var(--muted)}
.cal .on{position:relative;font-weight:600;color:var(--paper)}
.cal .on::before{content:"";position:absolute;left:50%;top:50%;width:36px;height:36px;margin:-18px 0 0 -18px;background:var(--ink);border-radius:50%;z-index:-1}
.cal .on{z-index:0}
.count{display:flex;justify-content:center;gap:10px;margin-top:26px}
.count div{width:70px;padding:12px 0;border:1px solid var(--line)}
.count b{display:block;font-family:var(--f-serif);font-size:28px;font-weight:500;line-height:1.2}
.count span{font-size:11px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}

/* ---------- Album ---------- */
.gal{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:26px}
.gal div{aspect-ratio:4/5;overflow:hidden}
.gal div:first-child{grid-column:span 2;aspect-ratio:3/2}
.gal button{display:block;width:100%;height:100%;border:0;padding:0;cursor:zoom-in;background:#e6e5e2}

/* ---------- Trình xem ảnh ---------- */
.lb{position:fixed;inset:0;z-index:60;background:#0e0e0e;color:#fff;display:flex;flex-direction:column}
.lb[hidden]{display:none}
.lb-top{display:flex;align-items:center;justify-content:space-between;padding:8px 8px 8px 18px;font-size:14px;letter-spacing:.1em;font-variant-numeric:tabular-nums}
.lb-top button,.lb-nav{width:48px;height:48px;border:0;background:transparent;color:#fff;display:grid;place-items:center;cursor:pointer}
.lb-top svg,.lb-nav svg{width:26px;height:26px}
.lb-track{flex:1;display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;overscroll-behavior:contain}
.lb-track::-webkit-scrollbar{display:none}
.lb-track figure{flex:0 0 100%;scroll-snap-align:center;display:grid;place-items:center;padding:0 8px}
.lb-track img{width:auto;height:auto;max-width:100%;max-height:calc(100vh - 170px);object-fit:contain}
.lb-nav{position:absolute;top:50%;margin-top:-24px;background:rgba(0,0,0,.35);border-radius:50%}
.lb-nav.prev{left:8px}.lb-nav.next{right:8px}
.lb-strip{display:flex;gap:6px;overflow-x:auto;padding:10px 12px 16px;scrollbar-width:none}
.lb-strip button{flex:0 0 52px;height:66px;padding:0;border:2px solid transparent;opacity:.5;cursor:pointer;background:#222}
.lb-strip button.on{border-color:#fff;opacity:1}
@media (hover:none){.lb-nav{display:none}}

/* ---------- Xác nhận tham dự ---------- */
.rsvp form{display:grid;gap:22px;margin-top:28px;text-align:left}
.field > .flabel{display:block;font-size:14px;font-weight:500;margin-bottom:8px}
.choice{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.choice label{position:relative;display:flex;align-items:center;justify-content:center;min-height:52px;padding:8px 10px;border:1px solid #bdbdbd;text-align:center;font-size:14px;line-height:1.35;cursor:pointer}
.choice input{position:absolute;opacity:0}
.choice input:checked + span{font-weight:600}
.choice label:has(input:checked){border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink);background:var(--soft)}
.stepper{display:flex;align-items:center;border:1px solid #bdbdbd;width:100%}
.stepper button{flex:0 0 64px;height:52px;border:0;background:transparent;font-size:24px;cursor:pointer}
.stepper button:first-child{border-right:1px solid #e0e0e0}
.stepper button:last-child{border-left:1px solid #e0e0e0}
.stepper output{flex:1;text-align:center;font-family:var(--f-serif);font-size:22px;font-weight:500}
.rsvp textarea{width:100%;min-height:96px;padding:12px 14px;border:1px solid #bdbdbd;background:transparent;font:inherit;color:var(--ink);border-radius:0;resize:vertical}
.hint{font-size:13px;color:var(--muted);margin-top:6px;text-wrap:pretty} /* không chia đôi dòng như text-wrap:balance */
.done{display:none;padding:28px 20px;border:1px solid var(--line);margin-top:28px}
.done .script{font-size:40px}
.rsvp.sent form{display:none}
.rsvp.sent .done{display:block}

/* ---------- Bảng lời chúc ---------- */
.board{position:relative;margin:30px -6px 0;padding:34px 14px 40px;background:#fff;border:1px solid #d9d8d4;border-radius:4px;
  box-shadow:0 1px 0 #d9d8d4, 0 14px 30px -12px rgba(0,0,0,.22);
  background-image:radial-gradient(rgba(0,0,0,.035) 1px, transparent 1px);background-size:4px 4px}
.board::before{content:"";position:absolute;left:50%;top:-9px;width:64px;height:18px;margin-left:-32px;background:rgba(210,205,195,.75);transform:rotate(-2deg)}
.notes{display:flex;flex-wrap:wrap;justify-content:space-around;align-items:flex-start;gap:6px 10px}
.note{line-height:1.25;padding:6px 4px;text-wrap:pretty}
.note i{display:block;font-style:normal;font-family:var(--f-body);font-size:12px;letter-spacing:.04em;margin-top:6px;opacity:.7}
.board-foot{margin-top:18px;font-size:13px;color:var(--muted)}

/* ---------- Mừng cưới ---------- */
.gift{margin-top:24px}
.gift-card{max-width:320px;margin:20px auto 0;padding:24px 20px;border:1px solid var(--line);display:none}
.gift.open .gift-card{display:block}
.gift-card img{width:200px;height:auto;margin:0 auto;border-radius:10px}
.acct{margin-top:16px;font-size:15px;line-height:1.7}
.acct b{font-family:var(--f-serif);font-size:20px;font-weight:600;letter-spacing:.06em}
.copied{display:block;height:20px;margin-top:8px;font-size:13px;color:var(--muted)}

footer{padding:76px 28px 100px;text-align:center}
.reveal{opacity:0;transform:translateY(18px);transition:opacity 1s, transform 1s}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
/* Máy tính bảng trở lên: cột thiệp nằm giữa nền xám */
@media (min-width:600px){
  .page{max-width:520px;box-shadow:0 0 40px rgba(0,0,0,.06)}
  section{padding-left:40px;padding-right:40px}
}
/* Máy tính: vẫn là cột thiệp ở giữa (giống trang mẫu), hai bên là nền */
@media (min-width:1000px){
  .page{max-width:540px}
  .fab{right:24px}
}

/* ---------- Thanh công cụ nổi ---------- */
.fab{position:fixed;right:10px;bottom:20px;z-index:20;display:grid;gap:10px;transition:opacity .3s, transform .3s}
.fab.hide{opacity:0;transform:translateX(70px);pointer-events:none}
.fab a,.fab button{width:48px;height:48px;border-radius:50%;border:0;background:rgba(27,27,27,.92);color:#fff;display:grid;place-items:center;box-shadow:0 3px 10px rgba(0,0,0,.25);cursor:pointer;text-decoration:none}
.fab svg{width:22px;height:22px}
.fab .music.playing svg{animation:spin 4s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Bổ sung cho bản thật ---------- */
.arch img,.gal img{background:#e6e5e2}
.env-text .who{padding:0 16px}
.noscript{padding:40px 24px;text-align:center}
.err{min-height:0;font-size:14px;color:#9b1c1c}
.err:empty{display:none}
.privacy{max-width:340px;margin:36px auto 0;font-size:12px;line-height:1.55;color:#8a8a8a}