h1,h2,h3,h4,h5,h6,p{margin:0}p:last-child{margin-bottom:0}ul{margin:0;padding:0;list-style:none}a{color:currentColor;text-decoration:none}button{cursor:pointer}img{display:block;max-width:100%;height:auto}.container{min-width:320px;max-width:375px;margin:0 auto;padding:0 16px}@media only screen and (min-width: 768px){.container{max-width:768px}}@media only screen and (min-width: 1200px){.container{max-width:1200px}}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:#f4f6fb;color:#111827}.page{min-height:100vh;display:grid;place-items:center;padding:24px}.panel{width:min(720px,100%);background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:24px;box-shadow:0 10px 30px #11182714}.controls{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap;margin-bottom:20px}#datetime-picker{width:260px;padding:12px 14px;border:1px solid #d1d5db;border-radius:10px;font-size:16px;outline:none}#datetime-picker:focus{border-color:#2563eb;box-shadow:0 0 0 3px #2563eb26}#datetime-picker:disabled{background:#f3f4f6;cursor:not-allowed}.btn,.button-main,.form button{padding:12px 18px;border:none;border-radius:10px;font-weight:600;font-size:15px;cursor:pointer;background:#22c55e;color:#fff;transition:transform .12s ease,background .12s ease,opacity .12s ease}.btn:hover,.button-main:hover,.form button:hover{background:#16a34a;transform:translateY(-1px)}.btn:disabled,.button-main:disabled,.form button:disabled{background:#86efac;color:#065f46;cursor:not-allowed;opacity:.8;transform:none}.timer{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.field{width:130px;border:1px solid #e5e7eb;border-radius:14px;padding:14px 12px;text-align:center;background:#fafafa}.value{display:block;font-size:34px;font-weight:800;letter-spacing:1px}.label{display:block;margin-top:6px;font-size:12px;color:#6b7280;text-transform:uppercase;letter-spacing:1px}.flatpickr-calendar{z-index:9999!important;border-radius:12px!important}body{margin:0;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;justify-content:center;align-items:center;font-family:Inter,Segoe UI,sans-serif}.form{background:#ffffff26;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);padding:30px 35px;border-radius:22px;box-shadow:0 20px 60px #00000040;width:320px;color:#fff}.form label{display:block;margin-bottom:16px;font-weight:500;font-size:14px}.form input[type=number]{width:100%;padding:10px 14px;border-radius:10px;border:none;font-size:15px;margin-top:6px;outline:none}fieldset{border:none;margin-bottom:18px;padding:0}legend{font-weight:600;margin-bottom:8px;font-size:13px;opacity:.9}input[type=radio]{margin-right:8px;accent-color:#43e97b}