*{box-sizing:border-box}
:root{
    --bg:#f4f4f4;
    --card:#fff;
    --text:#171717;
    --muted:#777;
    --line:#e5e5e5;
    --soft:#fafafa;
    --dark:#202020;
}

.lettre{max-width:900px;margin:55px auto;padding:0 20px}
.card{
    background:var(--card);
    border:1px solid #e2e2e2;
    border-radius:24px;
    box-shadow:0 18px 50px rgba(0,0,0,.07);
    overflow:hidden;
}
.header{padding:34px 36px 25px;border-bottom:1px solid var(--line)}
.eyebrow{font-size:12px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:#888}
h1{margin:8px 0 0;font-size:30px;letter-spacing:-.04em}
.comments{padding:8px 36px 10px}
.comment{
    padding:24px 0;
    border-bottom:1px solid var(--line);
    animation:appear .35s ease both;
}
.comment:last-child{border-bottom:0}
.meta{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:12px}
.author{font-weight:750;color:#151515;text-decoration:none}
.author:hover{text-decoration:underline}
.author.no-email{cursor:default}
.date{font-size:13px;color:var(--muted);white-space:nowrap}
.body{
    font-size:16px;line-height:1.7;
    color:#303030;
    white-space:pre-wrap;
    overflow-wrap:anywhere;
}
.empty{padding:45px 0;text-align:center;color:#888}
.form-area{background:var(--soft);border-top:1px solid var(--line);padding:30px 36px 36px}
.form-title{font-size:17px;font-weight:800;margin-bottom:20px}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
label{display:block;font-size:13px;font-weight:700;margin:0 0 7px;color:#555}
input,textarea{
    width:100%;border:1px solid #d7d7d7;background:#fff;border-radius:12px;
    padding:13px 14px;font:inherit;color:#222;outline:none;transition:.18s;
}
input:focus,textarea:focus{border-color:#888;box-shadow:0 0 0 4px rgba(0,0,0,.05)}
textarea{min-height:135px;resize:vertical}
.field-full{margin-top:14px}
.bottom{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:15px}
.hint{font-size:12px;color:#888}
button{
    border:0;border-radius:12px;background:var(--dark);color:#fff;
    padding:13px 20px;font-weight:800;cursor:pointer;transition:.18s;
}
button:hover{transform:translateY(-1px);background:#000}
button:disabled{opacity:.55;cursor:wait;transform:none}
.status{margin-top:13px;min-height:20px;font-size:13px}
.status.ok{color:#28753b}.status.error{color:#a22}
@keyframes appear{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
@media(max-width:650px){
    .lettre{margin:20px auto;padding:0 10px}
    .header,.comments,.form-area{padding-left:20px;padding-right:20px}
    h1{font-size:25px}
    .grid{grid-template-columns:1fr}
    .meta{align-items:flex-start;flex-direction:column;gap:5px}
    .bottom{align-items:stretch;flex-direction:column}
    button{width:100%}
}