.m-header{position:-webkit-sticky;position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;height:56px;padding:0 16px;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(0,0,0,.06);transition:background .3s,border-color .3s}.m-header--transparent{background:transparent;border-bottom-color:transparent;backdrop-filter:none;-webkit-backdrop-filter:none}.m-header__left,.m-header__right{display:flex;align-items:center;flex-shrink:0}.m-header__center{flex:1 1;display:flex;align-items:center;justify-content:center;margin:0 10px;min-width:0}.m-header__logo{height:28px;width:auto}.m-header__back{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;border-radius:50%;background:rgba(0,0,0,.04);color:var(--color-charcoal,#1e2824);cursor:pointer;transition:background .2s}.m-header__back:active{background:rgba(0,0,0,.1)}.m-header__title{font-size:1.05rem;font-weight:600;color:var(--color-charcoal,#1e2824);letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:50%;text-align:center}.m-header__avatar{display:flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;border:none;background:linear-gradient(135deg,var(--color-primary,#708c80),var(--color-primary-dark,#4a6a5a));color:#fff;font-size:.7rem;font-weight:700;letter-spacing:.04em;cursor:pointer;box-shadow:0 2px 8px rgba(112,140,128,.3);transition:transform .15s}.m-header__avatar:active{transform:scale(.92)}.m-header__login-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;border-radius:50%;background:rgba(112,140,128,.12);color:var(--color-primary-dark,#4a6a5a);cursor:pointer;transition:background .2s,transform .15s}.m-header__login-btn:active{background:rgba(112,140,128,.25);transform:scale(.92)}