:root{--ink:#f7fbff;--muted:#d7e2f2;--glass:rgba(15,23,42,.45);--shadow:0 30px 80px rgba(0,0,0,.35)}
*{box-sizing:border-box}html,body{height:100%}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;color:var(--ink);background:#0a1226;overflow-x:hidden}
.bg{position:fixed;inset:0;z-index:-2}
.bg::before{content:"";position:absolute;inset:0;background:url("./assets/bg_sky.png") center/cover no-repeat;filter:saturate(1.05) contrast(1.02) brightness(0.95);transform:scale(1.02)}
.bg::after{content:"";position:absolute;inset:0;background:radial-gradient(60% 40% at 50% 20%, rgba(255,255,255,.22), transparent 60%), linear-gradient(180deg, rgba(0,0,0,.06), rgba(0,0,0,.45))}
.container{max-width:1100px;margin:0 auto;padding:22px}
.header{margin-top:18px;background:rgba(10,16,30,.45);border:1px solid rgba(255,255,255,.15);border-radius:22px;box-shadow:var(--shadow);backdrop-filter:blur(8px);padding:18px 18px 12px}
.badge{display:inline-flex;gap:8px;align-items:center;padding:6px 10px;border-radius:999px;border:1px solid rgba(255,255,255,.2);background:rgba(10,16,28,.45);font-size:12px}
.title{margin:6px 0 0;font-size:clamp(30px,6vw,64px);line-height:1.06;text-shadow:0 0 18px rgba(0,0,0,.35)}
.subtitle{margin:6px 0 12px;color:var(--muted);font-weight:600}
.formBox{background:rgba(10,16,28,.45);border:1px solid rgba(255,255,255,.12);border-radius:20px;padding:16px;display:grid;gap:12px}
.inputs{display:grid;grid-template-columns:1fr;gap:10px}
@media(min-width:720px){.inputs{grid-template-columns:repeat(3,1fr)}}
.row{display:flex;gap:10px;align-items:center}
input[type=text]{width:100%;padding:12px 12px;border-radius:999px;border:1px solid rgba(255,255,255,.18);background:rgba(0,0,0,.28);color:#fff;font-size:15px}
input::placeholder{color:#cfe0ffb3}
.actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
button{appearance:none;border:0;cursor:pointer;background:linear-gradient(180deg,#3c5aa6,#243a6a);color:#fff;padding:12px 16px;border-radius:14px;font-weight:800;box-shadow:var(--shadow)}
button.secondary{background:rgba(35,54,100,.75)}
button.ghost{background:transparent;border:1px solid rgba(255,255,255,.3)}
.note{color:#e6f0ffcc;font-size:13px}
.sky{position:relative;height:66vh;min-height:560px;margin-top:16px;border-radius:24px;border:1px solid rgba(255,255,255,.14);background:rgba(10,16,28,.22);overflow:hidden;box-shadow:var(--shadow);backdrop-filter:blur(3px)}
.bubble{position:absolute;bottom:-180px;display:flex;align-items:center;justify-content:center;width:138px;height:138px;border-radius:50%;padding:16px;text-align:center;color:#0b1630;font-weight:800;background:radial-gradient(120% 120% at 30% 30%, rgba(255,255,255,.98), rgba(255,255,255,.62));border:1px solid rgba(255,255,255,.97);box-shadow:0 20px 48px rgba(0,0,0,.4), inset 0 12px 24px rgba(255,255,255,.78);filter:saturate(1.02) drop-shadow(0 12px 30px rgba(0,0,0,.35));animation: rise 24s linear forwards, drift 7s ease-in-out infinite}
.bubble.small{width:108px;height:108px;font-weight:700;opacity:.95}
.bubble.big{width:176px;height:176px}
.bubble.keep{background:radial-gradient(120% 120% at 30% 30%, #ffffff, #d5ebff);box-shadow:0 0 0 6px rgba(255,255,255,.16),0 20px 48px rgba(0,0,0,.4), inset 0 12px 24px rgba(255,255,255,.82)}
@keyframes rise{from{transform:translateY(0)}to{transform:translateY(-340vh)}}
@keyframes drift{0%,100%{transform:translateY(-40vh) translateX(-12px)}50%{transform:translateY(-44vh) translateX(14px)}}
.pop{animation:pop .9s ease forwards}
@keyframes pop{0%{transform:translateY(-52vh) scale(1);opacity:1}60%{transform:translateY(-56vh) scale(1.28);opacity:.92;filter:blur(0px)}100%{transform:translateY(-60vh) scale(0.34);opacity:0;filter:blur(5px)}}
.modal{position:fixed;inset:0;display:none;align-items:center;justify-content:center;background:rgba(2,6,23,.55);backdrop-filter:blur(10px);z-index:50}
.modal.show{display:flex}
.card{max-width:820px;margin:20px;color:#eaf2ff;line-height:1.8;background:rgba(10,16,30,.72);border:1px solid rgba(255,255,255,.18);border-radius:20px;padding:24px 22px;box-shadow:var(--shadow)}
.card h3{margin:0 0 8px;font-size:22px}
.card p{margin:10px 0}
.card .cta{display:flex;gap:12px;margin-top:14px;flex-wrap:wrap}
.card a.btn{text-decoration:none;color:white;padding:10px 14px;border-radius:12px;background:linear-gradient(180deg,#3c5aa6,#243a6a)}
.card button{background:transparent;border:1px solid rgba(255,255,255,.3)}
footer{margin:16px 0 30px;color:#cfe0ff;font-size:12px;text-align:center}
.result{margin-top:12px;font-size:16px;color:#eaf2ff;line-height:1.6}
.tip{opacity:.9;color:#d8e6ff}
.soundtip{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:rgba(10,16,28,.7);border:1px solid rgba(255,255,255,.2);padding:10px 14px;border-radius:999px;display:none}
.soundtip.show{display:block}