:root{--red:#c1121f;--red-d:#9b0e19;--green:#1f7a4f;--green-d:#165c3a;--gold:#f4d58d;--cream:#fffaf0;--txt:#2a1d14;--mut:#7a6a5c;--line:#eadfce;
  --display:Georgia,'Palatino Linotype','Book Antiqua',serif}
*{box-sizing:border-box}
html{min-height:100%}
body{margin:0;min-height:100vh;font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--txt);
  background:linear-gradient(180deg,#0b1a33 0%,#12304f 45%,#1b4a45 100%) fixed}

/* ---------- Décor en fond ---------- */
#sky{position:fixed;inset:0;overflow:hidden;pointer-events:none;z-index:0}
.moon{position:absolute;right:7%;top:70px;width:64px;height:64px;border-radius:50%;background:#fff7d6;
  box-shadow:0 0 40px 12px #fff7d655;opacity:.9}
.moon::after{content:"";position:absolute;inset:0;border-radius:50%;background:radial-gradient(circle at 30% 35%,#e9dfae 0 8%,transparent 9%),radial-gradient(circle at 65% 60%,#e9dfae 0 11%,transparent 12%)}
#stars i{position:absolute;width:var(--s);height:var(--s);background:#fff;border-radius:50%;animation:twinkle var(--d) ease-in-out infinite}
@keyframes twinkle{0%,100%{opacity:.25}50%{opacity:1}}
#snow i{position:absolute;top:-10px;background:#fff;border-radius:50%;animation:fall linear infinite,sway ease-in-out infinite alternate}
@keyframes fall{to{top:105vh}}
@keyframes sway{from{transform:translateX(-14px)}to{transform:translateX(14px)}}

.sleigh{position:absolute;top:84px;left:0;width:clamp(170px,26vw,300px);filter:drop-shadow(0 4px 8px #0006);
  animation:fly 22s linear infinite,bob 3.2s ease-in-out infinite}
@keyframes fly{from{translate:-30vw 0}to{translate:115vw 0}}
@keyframes bob{0%,100%{transform:translateY(0) rotate(-1.5deg)}50%{transform:translateY(-14px) rotate(1.5deg)}}
#gifts span{position:absolute;top:clamp(120px,16vh,170px);font-size:clamp(24px,4vw,38px);opacity:0;
  animation:drop 22s ease-in infinite;transform-origin:center}
@keyframes drop{
  0%{opacity:0;transform:translateY(0) rotate(0)}
  .5%{opacity:1}
  4%{opacity:1;transform:translateY(55vh) rotate(var(--r))}
  5%{opacity:0;transform:translateY(68vh) rotate(calc(var(--r)*1.6)) scale(.7)}
  100%{opacity:0}}

/* ---------- Guirlande lumineuse ---------- */
.lightrope{position:fixed;top:-12px;left:0;right:0;z-index:3;margin:0;padding:0;list-style:none;white-space:nowrap;
  display:flex;justify-content:space-between;pointer-events:none;height:56px}
.lightrope li{position:relative;flex:0 0 auto;width:12px;height:28px;margin-top:14px;border-radius:50%/60% 60% 40% 40%;
  background:var(--c);box-shadow:0 4px 16px 3px var(--c);animation:glow 1.8s ease-in-out infinite alternate}
.lightrope li::before{content:"";position:absolute;top:-9px;left:2px;width:8px;height:10px;background:#3b3b3b;border-radius:2px}
.lightrope li::after{content:"";position:absolute;top:-16px;left:-50px;width:100px;height:18px;border-bottom:2px solid #2d2d2d;border-radius:50%}
.lightrope li:nth-child(4n+1){--c:#ff3b3b;animation-delay:0s}
.lightrope li:nth-child(4n+2){--c:#ffd23f;animation-delay:.45s}
.lightrope li:nth-child(4n+3){--c:#3ddc84;animation-delay:.9s}
.lightrope li:nth-child(4n){--c:#4cc9ff;animation-delay:1.35s}
.lightrope li:first-child::after{left:-20px}
@keyframes glow{from{opacity:.45;box-shadow:0 2px 6px 1px var(--c)}to{opacity:1;box-shadow:0 4px 18px 5px var(--c)}}

/* ---------- Mise en page ---------- */
header{position:relative;z-index:2;text-align:center;padding:50px 16px 4px}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--gold)}
.logo{width:74px;height:74px;filter:drop-shadow(0 4px 10px #000a) drop-shadow(0 0 14px #f4d58d44);transition:transform .3s}
.brand:hover .logo{transform:rotate(-6deg) scale(1.06)}
.wordmark{display:flex;flex-direction:column;align-items:flex-start;line-height:.95;font-family:var(--display);text-shadow:0 2px 12px #000a}
.wordmark small{font-size:.8rem;letter-spacing:.3em;text-transform:uppercase;color:#cfe3ee;font-family:system-ui,sans-serif}
.wordmark b{font-size:2rem;font-weight:800;color:#fff}
.wordmark i{font-size:2.3rem;font-weight:700;color:var(--gold);margin-top:-2px}
main{position:relative;z-index:2;max-width:660px;margin:0 auto;padding:10px 16px 60px}
main>h1{font-family:var(--display);color:#fff;text-align:center;font-size:2rem;text-shadow:0 2px 10px #0008;margin:.3em 0 .1em}
main>p.muted{color:#cfe3ee;text-align:center}
h1,h2{font-family:var(--display)}
h1{font-size:1.7rem;margin:.2em 0}h2{font-size:1.2rem;margin:0 0 .6em;color:var(--green-d)}

.card{background:var(--cream);border:1px solid #fff3;border-radius:18px;padding:20px;margin:16px 0;
  box-shadow:0 10px 30px #0006,inset 0 0 0 2px #fff8;position:relative}
.card::before{content:"";position:absolute;left:18px;right:18px;top:-1px;height:4px;border-radius:0 0 6px 6px;
  background:repeating-linear-gradient(90deg,var(--red) 0 16px,#fff 16px 22px,var(--green) 22px 38px,#fff 38px 44px)}

label{display:block;font-weight:600;margin:.8em 0 .25em}
input,textarea,select{width:100%;padding:11px 13px;border:1.5px solid #d8c9b2;border-radius:11px;font:inherit;background:#fff;color:var(--txt)}
input:focus,select:focus{outline:3px solid #f4d58d99;border-color:var(--red)}
button,.btn{display:inline-block;background:linear-gradient(180deg,#e0242f,var(--red));color:#fff;border:0;border-radius:11px;padding:11px 18px;
  font:inherit;font-weight:700;cursor:pointer;text-decoration:none;margin-top:12px;box-shadow:0 3px 0 var(--red-d),0 6px 14px #0003;
  transition:transform .12s,box-shadow .12s}
button:hover,.btn:hover{transform:translateY(-1px)}
button:active,.btn:active{transform:translateY(2px);box-shadow:0 1px 0 var(--red-d)}
button.sec,.btn.sec{background:#fff;color:var(--red);border:1.5px solid var(--red);box-shadow:0 3px 0 #e6c9c9}
button.green,.btn.green{background:linear-gradient(180deg,#2b9a65,var(--green));box-shadow:0 3px 0 var(--green-d),0 6px 14px #0003}
button.big{width:100%;font-size:1.15rem;padding:15px;margin-top:6px}
button.x{background:none;color:var(--red);padding:2px 9px;margin:0;box-shadow:none;font-size:1.05rem}
button:disabled{opacity:.5;cursor:not-allowed;transform:none}

.muted{color:var(--mut);font-size:.93rem}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.row>*{flex:1 1 110px;min-width:0}.row>button{flex:0 0 auto;margin-top:0}
ul.clean{list-style:none;padding:0;margin:0}
ul.clean li{display:flex;justify-content:space-between;align-items:center;padding:9px 4px;border-bottom:1px dashed var(--line)}
ul.clean li:last-child{border:0}
.err{color:#fff;background:#b3261e;border-radius:10px;padding:0;margin:8px 0;font-weight:600}
.err:not(:empty){padding:9px 12px}

.names{display:grid;grid-template-columns:repeat(auto-fill,minmax(135px,1fr));gap:10px;margin:10px 0}
.names .name{margin:0;background:#fff;color:var(--txt);border:2px solid var(--line);font-size:1.08rem;box-shadow:0 3px 0 var(--line);padding:14px 8px}
.names .name:hover{border-color:var(--red);background:#fff4f2}
.names .name.seen{color:var(--mut);background:#efe9dc}

.reveal{text-align:center;padding:26px 16px;background:linear-gradient(#fffaf0,#fff0ee)}
.reveal .btn{margin:8px 4px 0}
.reveal .who{font-family:var(--display);font-size:2.6rem;font-weight:800;color:var(--red);margin:.3em 0;text-shadow:0 2px 0 #f4d58d}
.hidden-name{filter:blur(12px);user-select:none;cursor:pointer;transition:filter .3s}
.reveal h1::after{content:" 🎁";display:inline-block;animation:bounce 1.6s ease-in-out infinite}
@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}

#toast{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);background:#222;color:#fff;padding:10px 18px;border-radius:99px;opacity:0;transition:.3s;pointer-events:none;z-index:9;max-width:90vw;text-align:center}
#toast.show{opacity:1}

@media (max-width:520px){
  .moon{width:44px;height:44px;top:64px}
  .sleigh{top:76px}
  .reveal .who{font-size:2.1rem}
}
@media (prefers-reduced-motion:reduce){
  .sleigh,#gifts span,#snow i,#stars i,.lightrope li,.reveal h1::after{animation:none}
  .sleigh{translate:55vw 0}
  #gifts{display:none}
}
button.sec.big{margin-top:10px}.warn{background:#fff3cd;border-radius:10px;padding:9px 12px;color:#6b4e00;font-weight:600}