/* ── App Shell ── */
.f-app {
  display: flex; height: 100vh;
  background: var(--bg-app);
  overflow: hidden; font-family: var(--font); position: relative;
}

/* ── Overlay (mobile sidebar backdrop) ── */
.f-overlay {
  position: fixed; inset: 0; background: var(--bg-overlay);
  z-index: 40; opacity: 0; pointer-events: none; transition: opacity .32s;
}
.f-overlay.show { opacity: 1; pointer-events: all; }

/* ── Main Column ── */
.f-main {
  flex: 1; display: flex; flex-direction: column;
  min-width: 0; height: 100vh; overflow: hidden;
}

/* ── Topbar ── */
.f-topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface); backdrop-filter: blur(12px);
  position: sticky; top: 0; z-index: 10;
}
.f-menu-btn {
  background: none; border: none; cursor: pointer;
  padding: 6px; border-radius: 8px; transition: background .15s;
  flex-shrink: 0; line-height: 0; width: 32px;
  color: var(--text-primary);
}
.f-menu-btn:hover { background: var(--hover-bg); }
.f-topbar-center { flex: 1; display: flex; justify-content: center; }
.f-topbar-spacer { width: 32px; flex-shrink: 0; }

/* ── Topbar Profile ── */
.f-topbar-profile {
  width: 32px; height: 32px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; border-radius: 50%;
  transition: background .15s;
}
.f-topbar-profile:hover { background: var(--hover-bg); }
.f-topbar-profile .f-profile-avatar {
  width: 28px; height: 28px; border-width: 1.5px;
}
.f-topbar-profile .f-profile-avatar-placeholder {
  width: 28px; height: 28px; font-size: 1rem;
}
.f-topbar-login-icon { font-size: 1.1rem; line-height: 1; }

/* ── Filter Bar ── */
.f-filter-bar {
  display: flex; gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-filter); backdrop-filter: blur(8px);
  justify-content: center;
}

.f-filter-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 18px; border-radius: 12px;
  font-family: var(--font); font-size: 0.9rem; font-weight: 600;
  background: var(--hover-bg); border: 1px solid var(--border);
  color: var(--muted); cursor: pointer;
  transition: all 0.25s ease;
}
.f-filter-btn:hover {
  background: var(--hover-bg); border-color: rgba(var(--teal-rgb), .3);
  color: var(--text-primary);
}
.f-filter-btn.active {
  background: rgba(var(--teal-rgb), .15); border-color: rgba(var(--teal-rgb), .5);
  color: var(--teal); box-shadow: 0 0 12px rgba(var(--teal-rgb), .25);
  font-weight: 700;
}

/* ── Feed Wrap + Scroll ── */
.f-wrap { display: flex; flex: 1; overflow: hidden; min-height: 0; }

.f-feed {
  flex: 1; overflow-y: scroll; min-height: 0;
  padding: 16px; display: flex; flex-direction: column; gap: 14px;
}
.f-feed::-webkit-scrollbar { width: 4px; }
.f-feed::-webkit-scrollbar-track { background: transparent; }
.f-feed::-webkit-scrollbar-thumb { background: var(--muted2); border-radius: 2px; }

@media (max-width: 768px) {
  /* Лента занимает весь экран без отступов */
  .f-feed {
    padding: 10px;
    gap: 10px;
  }

  /* Топбар компактнее */
  .f-topbar {
    padding: 10px 12px;
  }

  /* Кнопка создания объявления — меньше */
  .f-post-btn {
    padding: 10px 16px;
    font-size: 0.85rem;
  }

  .f-login-btn {
    padding: 6px 14px;
    font-size: 0.8rem;
  }

  /* Фильтр компактнее */
  .f-filter-bar {
    padding: 10px 12px;
    gap: 8px;
  }
  .f-filter-btn {
    padding: 8px 14px;
    font-size: 0.85rem;
  }
}

@media (max-width: 600px) {
  .f-post-btn {
    padding: 4px 8px;
    font-size: 0.7rem;
    gap: 3px;
    border-radius: 10px;
  }

  .f-post-btn span {
    width: 14px;
    height: 14px;
    font-size: 0.75rem;
  }

  .f-login-btn {
    padding: 4px 8px;
    font-size: 0.68rem;
    border-radius: 8px;
  }

  .f-filter-btn {
    padding: 8px 12px;
    font-size: 0.8rem;
  }
}