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}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:#f4f4f4;color:#333;line-height:1.6;min-height:100vh;display:flex;flex-direction:column}img{display:block;max-width:100%;height:auto;object-fit:cover}ul,li{list-style:none}.container{width:100%;max-width:1200px;padding:0 20px;margin:0 auto}header{background-color:#0d6efd;padding:1rem 0;box-shadow:0 2px 8px #0000001a}.nav-list{display:flex;gap:20px;justify-content:center}.nav-list-item a{text-decoration:none;color:#fff;font-weight:500;transition:color .3s}.nav-list-item a:hover{color:#ffe600}.home-header{padding:24px 0;background-color:#f8f8f8;border-bottom:1px solid #ddd}.home-header .container{display:flex;justify-content:center}.home-nav-list{display:flex;gap:24px;list-style:none;padding:0;margin:0}.home-nav-list a{text-decoration:none;font-size:20px;font-weight:600;color:#4e75ff;transition:color .31s}.home-nav-list a:hover{color:#003eff}.home-main{display:flex;justify-content:center;align-items:center;height:calc(100vh - 80px);background-color:#fff}.timer-container{display:flex;flex-direction:column;align-items:center;gap:24px;margin-top:32px}#datetime-picker,button[data-start]{font-size:18px;padding:8px 12px;border-radius:6px;border:1px solid #ccc}.timer{display:flex;gap:24px;margin-top:16px}.field{display:flex;flex-direction:column;align-items:center}.value{font-size:48px;font-weight:700}.label{font-size:14px;color:#666}body{margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:#f5f5f5;color:#333}main{padding:40px 20px}.container{max-width:600px;margin:0 auto;background-color:#fff;padding:24px;border-radius:12px;box-shadow:0 4px 20px #00000014}.back-home-btn{display:inline-block;margin-bottom:24px;padding:10px 20px;background-color:#4e75ff;color:#fff;text-decoration:none;border-radius:8px;font-weight:500;transition:background-color .3s}.back-home-btn:hover{background-color:#003eff}.form{display:flex;flex-direction:column;gap:20px}.form label{display:flex;flex-direction:column;font-weight:500;font-size:16px}input[type=number],button[type=submit]{padding:10px 14px;font-size:16px;border:1px solid #ccc;border-radius:6px;transition:border-color .3s,box-shadow .3s}input[type=number]:focus{border-color:#4e75ff;outline:none;box-shadow:0 0 0 2px #4e75ff4d}button[type=submit]{background-color:#4e75ff;color:#fff;border:none;cursor:pointer;font-weight:600;transition:background-color .3s}button[type=submit]:hover{background-color:#003eff}fieldset{border:1px solid #ddd;border-radius:8px;padding:12px 16px}legend{font-weight:700;font-size:16px}fieldset label{display:flex;align-items:center;gap:8px;margin-top:8px}