/* ==========================================================================
   Responsive — mobile first friendly
   ========================================================================== */
@media (max-width: 1100px) {
  .sr-sidebar-right { display: none; }
  .sr-content { border-right: none; }
  .sr-card-thumb { width: 160px; }
}
@media (max-width: 768px) {
  .sr-menu-toggle { display: flex; }
  .sr-sidebar-left {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(320px, 85vw);
    max-width: 320px;
    z-index: 200;
    padding: calc(var(--sr-header-h) + 16px) 16px 16px;
    padding-left: max(16px, env(safe-area-inset-left));
    margin: 0;
    border-right: 1px solid var(--sr-border);
    background: var(--sr-dark);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.4);
    transform: translateX(-100%);
    transition: transform 0.25s ease-out;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  body.sr-menu-open .sr-sidebar-left { transform: translateX(0); }
  .sr-sidebar-close {
    display: flex;
    align-items: center;
    justify-content: center;
    top: calc(var(--sr-header-h) + 8px);
  }
  .sr-menu-backdrop {
    display: block;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease-out;
  }
  body.sr-menu-open .sr-menu-backdrop {
    opacity: 1;
    pointer-events: auto;
  }
  .sr-content { border-right: none; border-left: none; max-width: none; }
  .sr-main { padding-left: var(--sr-gap); padding-right: var(--sr-gap); }
  .sr-card-thumb { width: 120px; }
  .sr-header { padding-left: env(safe-area-inset-left); padding-right: env(safe-area-inset-right); }
  .sr-main { padding-left: calc(var(--sr-gap) + env(safe-area-inset-left)); padding-right: calc(var(--sr-gap) + env(safe-area-inset-right)); }
  .sr-footer { padding-left: env(safe-area-inset-left); padding-right: env(safe-area-inset-right); }
}
@media (max-width: 600px) {
  .sr-card { grid-template-columns: 1fr; }
  .sr-card-thumb { grid-column: 1; grid-row: 1; width: 100%; aspect-ratio: 2/1; }
  .sr-card-footer a,
  .sr-engagement-item,
  .sr-bookmark-btn,
  .sr-share-btn { min-height: 44px; display: inline-flex; align-items: center; padding: 8px 4px; }
  :root { --sr-gap: 16px; }
  .sr-content { padding: var(--sr-gap); }
  body { font-size: 16px; }
  .sr-article-title { font-size: 1.5rem; }
  .sr-pagination { flex-wrap: wrap; justify-content: center; gap: 8px; }
  /* Login modal — safe area, compact padding */
  .sr-login-modal { padding: max(var(--sr-gap), env(safe-area-inset-top)) max(var(--sr-gap), env(safe-area-inset-right)) max(var(--sr-gap), env(safe-area-inset-bottom)) max(var(--sr-gap), env(safe-area-inset-left)); }
  .sr-login-box { max-height: calc(100vh - 2 * var(--sr-gap)); padding-bottom: max(var(--sr-gap), env(safe-area-inset-bottom)); }
  .sr-login-close { top: max(12px, env(safe-area-inset-top)); right: max(12px, env(safe-area-inset-right)); }
  /* Write post modal — safe area */
  .sr-write-modal { padding: max(var(--sr-gap), env(safe-area-inset-top)) max(var(--sr-gap), env(safe-area-inset-right)) max(var(--sr-gap), env(safe-area-inset-bottom)) max(var(--sr-gap), env(safe-area-inset-left)); }
  .sr-write-box { max-height: calc(100vh - 2 * var(--sr-gap)); padding-bottom: max(var(--sr-gap), env(safe-area-inset-bottom)); }
  .sr-write-close { top: max(12px, env(safe-area-inset-top)); right: max(12px, env(safe-area-inset-right)); }
  .sr-login-title { font-size: 1.35rem; }
  .sr-header-right .sr-btn { padding-left: 14px; padding-right: 14px; font-size: 0.9rem; }
  .sr-header-inner .sr-logo { min-width: 0; }
  /* Header search — icon toggle, expandable panel */
  .sr-header-search-wrap {
    display: none;
    position: absolute;
    left: max(var(--sr-gap), env(safe-area-inset-left));
    right: max(var(--sr-gap), env(safe-area-inset-right));
    top: 100%;
    padding: 10px var(--sr-gap);
    background: var(--sr-dark);
    border-bottom: 1px solid var(--sr-border);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    z-index: 105;
    max-width: none;
    margin: 0;
  }
  .sr-header.sr-search-open .sr-header-search-wrap { display: block; }
  .sr-search-toggle { display: flex; }
  .sr-header-inner { position: relative; }
  /* Brief feed — comfortable tap */
  .sr-brief-feed { max-width: none; }
  .sr-brief-item { min-height: 44px; padding: 12px 0; }
  .sr-brief-title { font-size: 1rem; }
  .sr-brief-more-wrap { margin-top: 16px; }
  .sr-brief-more-btn { min-height: 44px; padding: 12px 0; }
  /* Feed sort dropdown — 16px font avoids iOS zoom on focus, 44px tap target */
  .sr-feed-select { font-size: 16px; min-height: 44px; padding: 10px 36px 10px 12px; }
  .sr-feed-switcher-wrap { margin-bottom: 12px; }
}
@media (max-width: 380px) {
  .sr-logo span:not(.sr-logo-icon) { font-size: 1rem; }
  .sr-header-right .sr-btn { padding-left: 10px; padding-right: 10px; font-size: 0.85rem; }
}