:root{--ivory:#faf6ef;--paper:#fffdf9;--ink:#2a1f1c;--muted:#7a6a62;--gold:#b8924a;--gold2:#d9bb7e;--wine:#6d1f2e;--wine2:#8c2c3f;--line:#e8dccb;--shadow:0 20px 50px -20px rgba(80,50,30,.25);--r:18px}
[data-theme=sage]{--wine:#2f4a3c;--wine2:#476b57;--gold:#a88b52}
[data-theme=blush]{--wine:#8a3b50;--wine2:#b0566d;--ivory:#fbf3f1}
[data-theme=navy]{--wine:#1f2e4d;--wine2:#35507f;--gold:#c0a062}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--ivory);color:var(--ink);font:16px/1.65 'Be Vietnam Pro',system-ui,sans-serif;-webkit-font-smoothing:antialiased}
h1,h2,h3,.serif{font-family:'Cormorant Garamond','Playfair Display',Georgia,serif;font-weight:600;letter-spacing:.2px;line-height:1.15;margin:0}
a{color:inherit}img{max-width:100%}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:999px;border:1px solid var(--wine);background:var(--wine);color:#fff;font:600 15px 'Be Vietnam Pro';cursor:pointer;text-decoration:none;transition:.25s;box-shadow:0 8px 20px -10px var(--wine)}
.btn:hover{background:var(--wine2);transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--wine);box-shadow:none}.btn.ghost:hover{background:var(--wine);color:#fff}
.btn.gold{background:linear-gradient(135deg,#c9a45c,#a67c33);border-color:#a67c33;color:#fff}
.btn.sm{padding:8px 16px;font-size:13px}
.eyebrow{letter-spacing:.32em;text-transform:uppercase;font-size:12px;color:var(--gold);font-weight:600}
.orn{display:flex;align-items:center;gap:14px;justify-content:center;color:var(--gold);margin:14px 0}.orn:before,.orn:after{content:"";height:1px;width:64px;background:linear-gradient(90deg,transparent,var(--gold))}.orn:after{transform:scaleX(-1)}
/* nav */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(250,246,239,.82);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{font-family:'Cormorant Garamond',serif;font-size:26px;font-weight:700;text-decoration:none;color:var(--wine);display:flex;align-items:center;gap:10px}
.logo i{font-style:normal;color:var(--gold)}
.nav nav{display:flex;gap:26px;align-items:center}.nav nav a{text-decoration:none;font-size:14px;color:var(--muted)}.nav nav a:hover{color:var(--wine)}
/* hero */
.hero{position:relative;overflow:hidden;padding:90px 0 110px;background:radial-gradient(1000px 500px at 85% -10%,#f3e3c7 0%,transparent 60%),radial-gradient(800px 500px at -10% 110%,#f1d7d9 0%,transparent 55%),var(--ivory)}
.hero .grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(44px,6.2vw,82px);color:var(--wine)}.hero h1 em{font-style:italic;color:var(--gold)}
.hero p.lead{font-size:18px;color:var(--muted);max-width:520px;margin:22px 0 32px}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap}
.hero .stats{display:flex;gap:34px;margin-top:44px}.hero .stats b{font:600 34px 'Cormorant Garamond';color:var(--wine);display:block}.hero .stats span{font-size:13px;color:var(--muted)}
.mock{position:relative;aspect-ratio:4/5;border-radius:260px 260px 28px 28px;background:linear-gradient(160deg,#6d1f2e,#3b1019);box-shadow:var(--shadow);overflow:hidden;display:flex;align-items:flex-end;justify-content:center}
.mock:before{content:"";position:absolute;inset:14px;border-radius:250px 250px 20px 20px;border:1px solid rgba(217,187,126,.55)}
.mock .card{position:relative;margin:0 0 38px;text-align:center;color:#f6e8c8;padding:0 26px}
.mock .card small{letter-spacing:.35em;font-size:11px;text-transform:uppercase;opacity:.8}
.mock .card h3{font-size:52px;font-weight:500;margin:10px 0;color:#f6e8c8}.mock .card h3 span{display:block;font-size:26px;color:var(--gold2);font-style:italic}
.float{position:absolute;background:#fff;border-radius:16px;padding:14px 18px;box-shadow:var(--shadow);font-size:13px;display:flex;gap:10px;align-items:center}
.float b{color:var(--wine)}.f1{left:-30px;top:18%}.f2{right:-24px;top:48%}.f3{left:6%;bottom:10%}
section.sec{padding:96px 0}section.alt{background:var(--paper);border-block:1px solid var(--line)}
.sec h2{font-size:clamp(34px,4.2vw,54px);color:var(--wine);text-align:center}.sec .sub{text-align:center;color:var(--muted);max-width:640px;margin:14px auto 54px}
.feat{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.fc{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:30px;transition:.3s;position:relative}
.fc:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--gold2)}
.fc .ic{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,#f5e8cf,#ecd4a3);color:var(--wine);font-size:24px;margin-bottom:18px}
.fc h3{font-size:25px;margin-bottom:8px}.fc p{margin:0;color:var(--muted);font-size:14.5px}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:s}.step{padding:26px;border-left:2px solid var(--gold2)}
.step:before{counter-increment:s;content:"0" counter(s);font:600 44px 'Cormorant Garamond';color:var(--gold)}.step h3{font-size:22px;margin:6px 0}.step p{color:var(--muted);font-size:14px;margin:0}
.band{background:linear-gradient(135deg,var(--wine),#3b1019);color:#f6e8c8;border-radius:28px;padding:64px 40px;text-align:center;position:relative;overflow:hidden}
.band h2{color:#f6e8c8}.band p{color:#e7d3ae;max-width:560px;margin:14px auto 28px}
.band .btn{background:#f6e8c8;color:var(--wine);border-color:#f6e8c8}
footer{padding:50px 0;color:var(--muted);font-size:13px;text-align:center;border-top:1px solid var(--line)}
/* forms */
input,select,textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;font:16px 'Be Vietnam Pro';color:var(--ink);outline:none;transition:.2s}
input:focus,select:focus,textarea:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(184,146,74,.18)}
label{font-size:13px;color:var(--muted);display:block;margin:12px 0 5px;font-weight:500}
.authbox{max-width:440px;margin:60px auto;background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:38px;box-shadow:var(--shadow)}
.authbox h1{font-size:38px;color:var(--wine);text-align:center}
.err{color:#a02828;font-size:13px;min-height:18px;margin-top:8px}
/* invite */
.inv-hero{min-height:100vh;display:grid;place-items:center;text-align:center;position:relative;background:linear-gradient(180deg,rgba(45,12,20,.78),rgba(45,12,20,.88)),radial-gradient(900px 600px at 50% 0,#8c2c3f,#2e0c14);color:#f6e8c8;padding:60px 20px}
.inv-hero:before{content:"";position:absolute;inset:22px;border:1px solid rgba(217,187,126,.5);pointer-events:none;border-radius:6px}
.inv-hero small{letter-spacing:.5em;text-transform:uppercase;font-size:12px;color:var(--gold2)}
.inv-hero h1{font-size:clamp(54px,11vw,128px);font-weight:500;color:#f9ecd0;margin:18px 0}.inv-hero h1 i{display:block;font-size:.34em;color:var(--gold2);font-weight:400;margin:6px 0}
.inv-hero .date{font:500 24px 'Cormorant Garamond';letter-spacing:.2em;color:var(--gold2)}
.cd{display:flex;gap:18px;justify-content:center;margin-top:34px}.cd div{min-width:78px;padding:14px 8px;border:1px solid rgba(217,187,126,.5);border-radius:14px}.cd b{font:600 38px 'Cormorant Garamond';display:block}.cd span{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold2)}
.inv-sec{padding:84px 20px;max-width:880px;margin:0 auto;text-align:center}.inv-sec h2{font-size:46px;color:var(--wine)}
.evt{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:30px}.evt .e{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:28px}
.evt h3{font-size:26px;color:var(--wine)}.rsvp{background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:34px;text-align:left;box-shadow:var(--shadow);max-width:560px;margin:30px auto 0}
.seg{display:flex;gap:10px}.seg label{flex:1;margin:0;cursor:pointer}.seg input{display:none}.seg span{display:block;text-align:center;padding:12px;border:1px solid var(--line);border-radius:12px;color:var(--ink);font-size:14px}.seg input:checked+span{background:var(--wine);color:#fff;border-color:var(--wine)}
.gal{columns:3 220px;column-gap:12px;margin-top:26px}.gal img{width:100%;border-radius:12px;margin-bottom:12px;display:block;cursor:zoom-in}
.wishes{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;text-align:left;margin-top:26px}.wish{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:18px}.wish p{margin:0 0 8px;font-size:14.5px}.wish b{font:600 18px 'Cormorant Garamond';color:var(--wine)}
.toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 22px;border-radius:999px;font-size:14px;z-index:99;box-shadow:var(--shadow)}
@media(max-width:860px){.hero .grid,.feat,.steps,.evt{grid-template-columns:1fr}.nav nav a:not(.btn){display:none}.mock{max-width:340px;margin:0 auto}.f1,.f2{display:none}.hero{padding:50px 0 70px}.cd div{min-width:64px}.cd{gap:10px}}
body,h1,h2,h3,h4,.serif,.kpi b,.score,.cd b,.stats b{font-variant-numeric:lining-nums;font-feature-settings:"lnum" 1}
.f3{left:auto;right:6%;bottom:-16px}
.hero .grid>div:last-child{padding-bottom:18px}

/* ===== Giao diện 2.0: sang trọng, sạch, dễ dùng cho mọi lứa tuổi ===== */
body{font-size:17px;line-height:1.7}
html.big{zoom:1.16}
.skip{position:absolute;left:-9999px;top:8px;background:#fff;color:var(--wine);padding:10px 16px;border-radius:10px;z-index:200;font-weight:600}.skip:focus{left:12px}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:8px}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.btn{min-height:46px}.btn.lg{min-height:58px;padding:16px 34px;font-size:17px}
.logo{gap:12px}.logo img{display:block;height:30px;width:auto}.logo .wd{font:600 25px 'Cormorant Garamond',serif;letter-spacing:.04em;color:var(--gold);padding-left:12px;border-left:1px solid var(--line);line-height:1}
.nav .wrap{height:76px}.nav nav{gap:22px}.nav nav a:not(.btn){font-size:15px;color:var(--ink);opacity:.8}
.tsz{border:1px solid var(--line);background:#fff;color:var(--wine);border-radius:999px;width:44px;height:44px;font:600 16px 'Cormorant Garamond',serif;cursor:pointer}
.hero2{position:relative;overflow:hidden;padding:84px 0 100px;background:radial-gradient(900px 520px at 90% -8%,#f1dfc0 0,transparent 62%),radial-gradient(700px 480px at -8% 108%,#f3d9db 0,transparent 58%),var(--ivory)}
.hgrid{display:grid;grid-template-columns:1.08fr .92fr;gap:64px;align-items:center}
.hero2 h1{font-size:clamp(46px,6.4vw,88px);color:var(--wine);margin:14px 0 0}.hero2 h1 em{font-style:italic;color:var(--gold)}
.hero2 .lead{font-size:19px;color:#5f524b;max-width:560px;margin:24px 0 34px}
.hero2 .cta{display:flex;gap:14px;flex-wrap:wrap}.hero2 .note{margin:18px 0 0;font-size:15px;color:var(--muted)}
.vis{position:relative;max-width:420px;margin:0 auto;width:100%}
.arch{aspect-ratio:4/5;border-radius:240px 240px 30px 30px;background:linear-gradient(165deg,#7a2435,#3b1019);box-shadow:0 40px 80px -30px rgba(80,20,30,.55);position:relative;display:flex;align-items:flex-end;justify-content:center}
.arch:before{content:"";position:absolute;inset:14px;border-radius:228px 228px 20px 20px;border:1px solid rgba(217,187,126,.55)}
.arch .inner{position:relative;text-align:center;color:#f6e8c8;padding:0 24px 44px}.arch small{display:block;letter-spacing:.34em;font-size:11px;text-transform:uppercase;opacity:.85}
.arch .nm{font:500 50px/1.1 'Cormorant Garamond',serif;margin-top:6px}.arch .amp{font:italic 28px 'Cormorant Garamond',serif;color:var(--gold2);margin:2px 0}
.chip{position:absolute;background:#fff;border-radius:14px;padding:11px 16px;box-shadow:0 18px 40px -18px rgba(60,30,20,.35);font-size:14px;font-weight:500;color:var(--ink)}
.chip.c1{left:-26px;top:16%}.chip.c2{right:-22px;top:46%}.chip.c3{left:2%;bottom:6%}.cap{text-align:center;font-size:12px;color:var(--muted);margin-top:14px}
.sec{padding:100px 0}.sec h2{font-size:clamp(34px,4.4vw,56px)}.sec .sub{font-size:18px}
.feat{grid-template-columns:repeat(3,1fr);gap:24px}.fc{padding:34px;border-radius:22px}.fc h3{font-size:28px}.fc p{font-size:16.5px;line-height:1.65}.fc .ic{width:58px;height:58px;font-size:26px}
.steps3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:10px}.st{background:var(--paper);border:1px solid var(--line);border-radius:22px;padding:34px}.st span{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:var(--wine);color:#f6e8c8;font:600 26px 'Cormorant Garamond',serif;margin-bottom:14px}.st h3{font-size:28px;margin-bottom:6px}.st p{margin:0;color:var(--muted)}
.roles{margin-top:38px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:center;color:var(--muted)}.roles span{border:1px solid var(--line);background:#fff;padding:8px 16px;border-radius:999px;font-size:14.5px;color:var(--ink)}
.two{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}.lead2{font-size:19px;color:#5f524b}
.quote{background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:34px;box-shadow:var(--shadow)}.quote p{font:italic 500 26px/1.4 'Cormorant Garamond',serif;color:var(--wine);margin:10px 0}.quote small{color:var(--muted)}.stars{color:var(--gold);font-size:22px;letter-spacing:3px}
.reward{padding-top:20px}.rbox{background:linear-gradient(135deg,#6d1f2e,#3b1019);color:#f6e8c8;border-radius:32px;padding:68px 48px;text-align:center;position:relative;overflow:hidden}.rbox h2{color:#f9ecd0;margin:10px auto 16px;max-width:760px}.rbox p{max-width:720px;margin:12px auto;font-size:18px;color:#ecd9b4}.rbox .fine{font-size:14px;color:#cdb68a}
.narrow{max-width:640px}.wlf{background:var(--paper);border:1px solid var(--line);border-radius:26px;padding:34px;box-shadow:var(--shadow)}.wlf input,.wlf select{min-height:52px;font-size:17px}.wlf label{font-size:15px;color:var(--ink)}
.chk{display:flex;gap:12px;align-items:flex-start;margin-top:16px!important;font-size:14.5px!important;line-height:1.5;color:var(--muted)!important}.chk input{width:24px;height:24px;flex:none;margin-top:2px}
.wm{min-height:22px;margin-top:12px;font-size:15px}.wm.bad{color:#a02828}
details{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:6px 22px;margin-bottom:12px}summary{cursor:pointer;font-weight:600;padding:16px 0;font-size:17.5px;list-style:none}summary::-webkit-details-marker{display:none}summary:after{content:"＋";float:right;color:var(--gold);font-size:22px}details[open] summary:after{content:"－"}details p{margin:0 0 18px;color:var(--muted)}
.foot{padding:56px 20px;text-align:center;border-top:1px solid var(--line);background:var(--paper)}.foot .logo{justify-content:center;margin-bottom:12px}.foot p{max-width:720px;margin:0 auto;color:var(--muted);font-size:13.5px}
@media(max-width:860px){.hgrid,.two,.steps3{grid-template-columns:1fr}.hero2{padding:44px 0 64px}.sec{padding:64px 0}.chip.c1,.chip.c2{display:none}.rbox{padding:44px 22px}.nav nav a:not(.btn){display:none}.logo .wd{font-size:21px;padding-left:9px}.logo img{height:26px}.hero2 .cta .btn{width:100%;justify-content:center}}
@media(max-width:560px){.nav nav .btn.ghost{display:none}.feat{grid-template-columns:1fr}}
.nav .btn{white-space:nowrap}
@media(max-width:560px){.nav .wrap{gap:8px;padding:0 14px}.nav nav{gap:8px}.logo img{height:22px}.logo .wd{font-size:18px;padding-left:8px}.tsz{width:40px;height:40px}.nav .btn.sm{padding:9px 14px;font-size:13px}}
/* QA 16/10: chữ ≥14px, lỗi form rõ, chip không che chữ */
.hbul{margin:14px 0 24px;padding-left:20px;font-size:17px;color:var(--ink)}.hbul li{margin:4px 0}
.fe{color:#a02828;font-size:15px;min-height:0;margin-top:6px}.wlf input.bad,.wlf select.bad{border-color:#a02828;box-shadow:0 0 0 2px rgba(160,40,40,.2)}
label.ck2{display:flex;gap:12px;align-items:flex-start;cursor:pointer;font-weight:500;color:var(--ink)}label.ck2 input{width:26px;height:26px;flex:none;margin:2px 0 0}label.ck2.bad{outline:2px solid #a02828;border-radius:10px;padding:6px}
.tsz{width:auto;padding:0 14px;display:inline-flex;align-items:center;gap:6px;font:600 16px 'Be Vietnam Pro',sans-serif}.tsz span{font-size:14px;font-weight:500}
@media(max-width:560px){.tsz span{display:none}}
.nav .btn.sm,.btn.sm{font-size:14px}
.chip.c1{left:-12px;top:-2%}.chip.c2{right:-12px;top:34%;bottom:auto}.chip.c3{left:50%;transform:translateX(-50%);bottom:-18px}
.arch small{font-size:13px}.arch .inner{padding-bottom:56px}
.inv-hero small,.cd span{font-size:13px!important;color:#f0dcae}
.rsvp label{font-size:16px;color:var(--ink);font-weight:600}.req{color:#a02828}.stp{display:flex;gap:8px;align-items:center}.stp input{width:90px;text-align:center}.stp .btn{min-width:48px;justify-content:center;padding:10px}
.wlf label,.foot p{font-size:15px}
.blog{padding:40px 0 70px}.blog h1{font-size:clamp(32px,6vw,46px);color:var(--wine);margin:6px 0}.blog h2{font-size:26px;margin:30px 0 8px;color:var(--wine)}.blog p,.blog li{font-size:18px;line-height:1.7}.blog ul{padding-left:22px}
.bl-c{display:block;text-decoration:none;margin:14px 0;padding:22px}.bl-c h2{margin:0 0 6px;font-size:24px}.bl-c p{margin:0 0 8px;font-size:16px;color:var(--muted)}
.bl-a{background:#fffaf0;border:1px solid var(--gold2);border-radius:14px;padding:16px 18px;margin:16px 0}.bl-w{background:#fff4f2;border:1px solid #e7c4be;border-radius:14px;padding:6px 18px 12px;margin:26px 0}.bl-w h2{color:#8c2c3f;margin-top:14px}
.bl-cta{padding:22px;margin:30px 0;text-align:center}.blog details{border-bottom:1px solid var(--line);padding:10px 0}.blog summary{font-weight:600;cursor:pointer;font-size:18px}
.evx{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.evx .e{text-align:left}.evx .e p{margin:4px 0}
.evrow{border:1px solid var(--line);border-radius:14px;padding:12px 14px;margin:8px 0;display:grid;gap:6px}.evrow b{font-size:16.5px}
footer a,.foot a{display:inline-block;padding:13px 6px;margin:-13px -6px}

/* 24/10: trang thiệp /w/<slug> — chữ ≥16px, nút ≥44px, giữ bố cục */
.inv-hero small{font-size:16px;letter-spacing:.32em}
.cd span{font-size:16px;letter-spacing:.1em}
.cd div{min-width:72px}
@media(max-width:420px){.cd{gap:8px}.cd div{min-width:68px;padding:12px 6px}}
.inv-hero .btn,.inv-sec .btn,.inv-sec .btn.sm,.inv-sec label.btn{font-size:16px;min-height:44px}
.inv-sec .td,.inv-sec .s-note,.inv-sec label span,.inv-sec .rv span{font-size:16px}
.inv-sec .btn.sm,.inv-sec label.btn.sm{padding-top:10px;padding-bottom:10px}
.inv-sec p,.inv-sec blockquote{font-size:max(16px,1em)}
body:has(.inv-hero) footer,body:has(.inv-hero) footer a{font-size:16px}
body:has(.inv-hero) .inv-hero small{font-size:16px!important}
body:has(.inv-hero) .cd span{font-size:16px!important}
body:has(.inv-hero) .td{font-size:16px!important}