:root{--cream:#eee8d5;--paper:#f7f3e8;--ink:#292927;--olive:#626850;--line:rgba(41,41,39,.18)}
*{box-sizing:border-box}
html{font-family:Montserrat,Arial,sans-serif;background:var(--olive);color:var(--ink)}
body{margin:0;min-height:100vh;min-height:100dvh;display:grid;place-items:center;padding:18px;background:var(--olive)}
button,input{font:inherit}
.timer-shell{width:min(100%,520px);background:var(--paper);padding:clamp(22px,6vw,38px);box-shadow:0 22px 60px rgba(0,0,0,.2)}
header{display:flex;align-items:center;gap:14px;padding-bottom:24px;border-bottom:1px solid var(--line)}
header img{width:45px;height:45px;object-fit:contain}
header p{margin:0 0 3px;font-size:.65rem;font-weight:700;letter-spacing:.14em}
h1{margin:0;font-size:clamp(1.65rem,6vw,2.15rem);line-height:1;letter-spacing:-.04em}
form{padding-top:26px}
label{display:block;margin:0 0 9px;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em}
.time-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;margin-bottom:24px}
input[type=time]{width:100%;min-width:0;height:64px;border:2px solid var(--ink);border-radius:0;background:#fff;color:var(--ink);padding:0 13px;font-size:1.4rem;font-weight:700;font-variant-numeric:tabular-nums}
button{border:0;border-radius:0;cursor:pointer;font-weight:700}
.now-button{min-height:64px;padding:0 13px;background:var(--cream);color:var(--ink);border:1px solid var(--line);font-size:.72rem;text-transform:uppercase}
.calculate-button{width:100%;min-height:64px;background:var(--ink);color:var(--paper);font-size:1rem;text-transform:uppercase;letter-spacing:.06em}
.error{margin:16px 0 0;padding:13px;background:#ffe1d9;color:#852c19;font-size:.86rem;font-weight:600}
.result{margin-top:26px;padding:28px 18px;text-align:center;background:var(--olive);color:var(--paper)}
.result p{margin:0 0 5px;font-size:.72rem;font-weight:700;letter-spacing:.13em;text-transform:uppercase}
.result output{display:block;font-size:clamp(3rem,15vw,5rem);font-variant-numeric:tabular-nums;font-weight:700;line-height:1.1;letter-spacing:-.06em}
.result button{margin-top:22px;min-height:48px;padding:0 18px;background:var(--paper);color:var(--ink);text-transform:uppercase;font-size:.7rem;letter-spacing:.08em}
button:active{transform:translateY(1px)}
button:focus-visible,input:focus-visible{outline:3px solid #d8ff67;outline-offset:2px}
@media(max-width:380px){body{padding:0}.timer-shell{min-height:100vh;min-height:100dvh}.time-row{grid-template-columns:1fr}.now-button{min-height:48px}.result output{font-size:3.1rem}}