:root{--bg:#eff6ff;--bg-soft:#f8fbff;--card:#fffc;--card-solid:#fff;--text:#111827;--muted:#64748b;--line:#dbe7f5;--primary:#2563eb;--primary-dark:#1d4ed8;--red:#dc2626;--black:#111827;--green:#16a34a;--green-soft:#dcfce7;--danger:#dc2626;--shadow:0 24px 70px #0f172a21;--shadow-soft:0 14px 35px #0f172a14;--radius:24px;--radius-sm:16px}
*{margin:0;padding:0;box-sizing:border-box}
html{min-height:100%;scroll-behavior:smooth}
body{min-height:100vh;min-height:100dvh;font-family:"Source Sans Pro",sans-serif;color:var(--text);background:radial-gradient(circle at 15% 10%,#fff 0%,transparent 30%),radial-gradient(circle at 85% 18%,#bfdbfe 0%,transparent 34%),radial-gradient(circle at 50% 100%,#dbeafe 0%,transparent 42%),linear-gradient(135deg,#f8fbff,#eff6ff 45%,#e0f2fe);padding:42px 18px 26px;overflow-x:hidden}
body::before,body::after{content:"";position:fixed;width:280px;height:280px;border-radius:999px;background:#2563eb1f;filter:blur(8px);pointer-events:none;z-index:-1}
body::before{top:-90px;left:-90px}
body::after{right:-120px;bottom:-120px;background:#dc262614}
.wrapper{width:min(100%,860px);margin:0 auto;padding:34px;border:1px solid #ffffffbf;border-radius:32px;background:linear-gradient(180deg,#ffffffe0,#ffffffb8);box-shadow:var(--shadow);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
.hero{text-align:center;margin-bottom:28px}
.brand-title{display:flex;align-items:center;justify-content:center;gap:14px;margin-bottom:16px}
.title-icon{width:58px;height:58px;object-fit:contain;flex:0 0 auto;border-radius:18px;box-shadow:0 12px 28px #2563eb2e}
h1{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;font-size:clamp(28px,4.5vw,44px);line-height:1.05;font-weight:800;letter-spacing:.5px}
.title-red{color:var(--red)}
.title-dark{color:var(--black)}
.subtitle{width:min(100%,680px);margin:0 auto;color:var(--muted);font-size:clamp(17px,2.4vw,23px);line-height:1.45;font-weight:500}
.date-form{display:grid;gap:18px}
.card{padding:22px;border:1px solid #dbe7f5f2;border-radius:var(--radius);background:#ffffffc7;box-shadow:var(--shadow-soft);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease,background .22s ease}
.card:hover{transform:translateY(-2px);border-color:#bfdbfe;background:#ffffffeb;box-shadow:0 18px 45px #0f172a1c}
.card-header{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px}
.card-heading{margin-bottom:16px}
h2{font-size:21px;line-height:1.2;font-weight:800;color:var(--text)}
h2.startdate{margin:0}
.today-btn{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:8px 14px;border:1px solid #bfdbfe;border-radius:999px;background:linear-gradient(180deg,#fff,#eff6ff);color:var(--primary);font-size:14px;font-weight:800;font-family:inherit;cursor:pointer;box-shadow:0 8px 18px #2563eb1f;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease}
.today-btn:hover{transform:translateY(-1px);background:#dbeafe;border-color:#93c5fd;box-shadow:0 12px 24px #2563eb29}
.date-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.field{min-width:0}
label{display:block;margin-bottom:7px;color:#334155;font-size:14px;font-weight:800}
input,select{width:100%;min-height:48px;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#fffffff2;color:var(--text);font-family:inherit;font-size:16px;font-weight:600;outline:none;box-shadow:0 8px 20px #0f172a0a;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease,transform .2s ease}
input::placeholder{color:#94a3b8;font-weight:500}
input:focus,select:focus{border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px #2563eb26}
.form-group-inline{display:flex;align-items:center;gap:12px}
.form-group-inline input{flex:1;min-width:0}
.form-group-inline span{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 16px;border:1px solid #bfdbfe;border-radius:var(--radius-sm);background:#eff6ff;color:#1e3a8a;font-size:15px;font-weight:800;white-space:nowrap}
.submit-btn,button[type="submit"]{width:100%;min-height:52px;margin-top:2px;border:0;border-radius:18px;background:linear-gradient(135deg,var(--primary),#3b82f6);color:#fff;font-family:inherit;font-size:17px;font-weight:800;cursor:pointer;box-shadow:0 16px 35px #2563eb42;transition:transform .22s ease,box-shadow .22s ease,filter .22s ease}
.submit-btn:hover,button[type="submit"]:hover{transform:translateY(-2px);filter:saturate(1.08);box-shadow:0 20px 45px #2563eb57}
.result{margin-top:22px;padding:24px 22px;border:1px solid #bfdbfef2;border-radius:var(--radius);background:linear-gradient(135deg,#fff,#eff6ff);text-align:center;box-shadow:var(--shadow-soft)}
.result h3{display:inline-flex;align-items:center;justify-content:center;width:max-content;margin:0 auto 12px;padding:6px 14px;background:#eff6ff;border-radius:999px;border:1px solid #bfdbfe;color:#1e3a8a;font-size:16px;font-weight:800;letter-spacing:.35px;text-transform:uppercase}
#resultDate{color:var(--primary-dark);font-size:clamp(28px,5vw,42px);line-height:1.15;font-weight:600;word-break:break-word}
.error{min-height:20px;margin-top:10px;color:var(--danger);font-size:14px;font-weight:700}
.footer{width:min(100%,860px);margin:22px auto 0;text-align:center;color:#334155;font-size:14px;font-weight:700}
.credit a{color:var(--primary);text-decoration:none;font-weight:800}
.credit a:hover{text-decoration:underline}
.support{margin-top:12px;text-align:center}
.support-btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:40px;padding:8px 12px;border:1px solid #86efac;border-radius:999px;background:linear-gradient(180deg,#f0fdf4,var(--green-soft));box-shadow:0 12px 24px #16a34a21;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
.support a{color:#166534;text-decoration:none;font-size:14px;font-weight:600}
.support-btn:hover,.credit .support-btn:hover,.support a:hover{transform:translateY(-1px);background:#bbf7d0;text-decoration:none;box-shadow:0 16px 30px #16a34a2e}
.icon-gift{width:20px;height:20px;fill:#dc2626;animation:shake 2.5s infinite;transform-origin:center}
@keyframes shake {
0%{transform:rotate(0deg)}
5%{transform:rotate(-8deg)}
10%{transform:rotate(6deg)}
15%{transform:rotate(-4deg)}
20%{transform:rotate(2deg)}
25%{transform:rotate(0deg)}
100%{transform:rotate(0deg)}
}
@media(max-width:720px) {
body{padding:22px 12px}
.wrapper{padding:22px;border-radius:26px}
.brand-title{gap:10px}
.title-icon{width:46px;height:46px;border-radius:15px}
.card{padding:18px;border-radius:20px}
.card-header{align-items:flex-end}
.date-row{gap:12px}
}
@media(max-width:560px) {
.wrapper{padding:18px 12px;border-radius:22px}
.brand-title{flex-direction:row;align-items:center;justify-content:center;gap:8px;width:100%}
.title-icon{width:38px;height:38px;flex:0 0 38px;border-radius:12px}
h1{flex:0 1 auto;flex-wrap:nowrap;justify-content:flex-start;gap:4px;min-width:0;text-align:left;font-size:clamp(20px,5.7vw,27px);letter-spacing:.1px;white-space:nowrap}
.title-red,.title-dark{white-space:nowrap}
.subtitle{font-size:17px}
.card-header{flex-direction:row;align-items:center;justify-content:space-between;gap:12px}
.card-header > div{min-width:0}
.today-btn{width:auto;flex:0 0 auto;min-height:34px;padding:7px 12px;margin-bottom:0;font-size:13px}
.date-row{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
label{font-size:13px}
input,select{min-height:45px;padding:10px;font-size:15px;border-radius:14px}
.form-group-inline{flex-direction:row;align-items:center;gap:8px}
.form-group-inline span{width:auto;min-width:70px;min-height:45px;padding:0 12px;font-size:14px;border-radius:14px}
.result h3{font-size:16px;padding:6px 12px}
.footer{padding:0 10px}
}
@media(max-width:380px) {
body{padding-left:8px;padding-right:8px}
.wrapper{padding:16px 10px}
.brand-title{gap:7px}
.title-icon{width:34px;height:34px;flex-basis:34px;border-radius:11px}
h1{font-size:clamp(18px,5.4vw,22px);gap:3px;letter-spacing:0}
.today-btn{min-height:32px;padding:6px 10px;font-size:12px}
.card{padding:15px}
.date-row{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}
label{font-size:12px}
input,select{min-height:42px;padding:8px 7px;font-size:14px;border-radius:12px}
.form-group-inline{flex-direction:row;gap:7px}
.form-group-inline span{width:auto;min-width:62px;min-height:42px;padding:0 9px;font-size:13px;border-radius:12px}
.result h3{font-size:14px;padding:5px 11px}
}