/* ==============================
   20 Layout
   ============================== */

/* site header (your html_top uses #site-header/#site-main) */
#site-header{
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg);
  border-bottom: 1px solid #334155;
  padding-top: env(safe-area-inset-top, 0);
}

@media (max-width: 768px){
  :root{ --header-h: var(--header-h-mobile); }
}

#site-main{
  padding-top: var(--header-h);
}

/* legacy header classes (keep) */
.header{
  position:fixed; inset:0 0 auto 0; z-index:1000;
  display:flex; align-items:center; justify-content:space-between;
  height:var(--header-h); width:100%;
  background:var(--surface); border-bottom:1px solid var(--border);
  padding:0 clamp(12px,2.5vw,16px);
  padding-left:max(16px, env(safe-area-inset-left));
  padding-right:max(16px, env(safe-area-inset-right));
}

.title{ margin:0; font-size:18px; white-space:nowrap }
.nav{ margin-left:auto; display:flex; gap:12px; align-items:center }

.page{
  min-height:100svh;
  width:100%;
  padding-top:calc(var(--header-h) + 12px);
}

.content{
  padding:16px clamp(12px,3vw,16px) 24px;
  max-width:720px;
  margin-inline:auto;
}

/* widen helpers */
.page--wide .content{ max-width:1200px; }
.page--full .content{ max-width:none; }

/* grids */
.grid{ display:grid; gap:16px; grid-template-columns:1fr }
@media (min-width:768px){ .grid{ grid-template-columns:1fr 1fr } }

.row{ display:grid; gap:12px; grid-template-columns:1fr 1fr }
@media (max-width:480px){ .row{ grid-template-columns:1fr } }

[id]{ scroll-margin-top: calc(var(--header-h) + 12px) }

/* common layout blocks */
.flex-between{ display:flex; align-items:center; justify-content:space-between; gap:12px }
.btn-row{ display:flex; gap:8px; flex-wrap:wrap }

.seg-actions{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  justify-content:flex-end;
}

.next-action{
  display:inline-block;
  background:#fff3bf;
  color:#5f4c00;
  border:1px solid #ffd666;
  border-radius:10px;
  padding:.25rem .6rem;
  font-weight:600;
  margin-left:.5rem;
}

/* monthbar */
.monthbar{
  display:flex;
  gap:10px;
  align-items:center;
  flex-wrap:wrap;
  margin-top:10px;
}
.monthbar__nav{ display:flex; gap:8px; align-items:center; }
.monthbar__ym{ margin-left:8px; font-weight:700; opacity:.9; }
.monthbar__search{
  display:flex;
  gap:6px;
  align-items:center;
  flex:1;
  min-width:280px;
}
.monthbar__links{ margin-left:auto; }

.btn--sm{
  padding:8px 12px;
  border-radius:10px;
  font-size:14px;
  line-height:1;
}
.input--sm{
  padding:8px 10px;
  border-radius:10px;
  font-size:14px;
  width:min(520px, 100%);
}

/* =========================
   Container: center content
   ========================= */

/* 共通コンテナ（中身の最大幅） */
.container {
  width: min(1200px, 100%);
  margin: 0 auto;
  padding: 16px;
}

/* 画面が広いときだけ余白を増やす */
@media (min-width: 1200px) {
  .container { padding: 24px; }
}

/* “広め画面”が必要なページ用（一覧とか） */
.container-wide {
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: 16px;
}

.app-header{
  position: sticky;
  top:0;
  z-index: 50;
  background: rgba(2,6,23,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

/* ←ここが肝：ヘッダー“中身”を中央寄せ */
.header-inner{
  width:min(1200px, 100%);
  margin:0 auto;
  padding:10px 16px;
  display:flex;
  align-items:center;
  gap:12px;
}

.header-nav{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

.header-menu-btn{
  margin-left:auto; /* 右寄せ固定 */
  width:42px;
  height:42px;
  border-radius:12px;
}

.header-nav a,
.header-nav button{
  display:inline-flex;
  align-items:center;
  height:34px;
  padding:0 12px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.04);
  color: var(--text);
  text-decoration:none;
  font-weight:600;
}
.header-nav a:hover,
.header-nav button:hover{
  background: rgba(255,255,255,.08);
}