:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --surface-2: #f0efeb;
  --text: #23211d;
  --muted: #7a756c;
  --border: #e2ded6;
  --accent: #b4643a;
  --accent-soft: #f6e7de;
  --danger: #c0392b;
  --shadow: 0 1px 2px rgba(35,33,29,.06), 0 8px 24px rgba(35,33,29,.07);
  --radius: 12px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1917;
    --surface: #232220;
    --surface-2: #2c2a27;
    --text: #eceae5;
    --muted: #a19b91;
    --border: #37342f;
    --accent: #e08b5c;
    --accent-soft: #3a2b22;
    --danger: #e06c5c;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", system-ui, -apple-system, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
[hidden] { display: none !important; }
h1, h2, h3 { line-height: 1.35; margin: 0; }
.muted { color: var(--muted); font-size: .875rem; }
.error { color: var(--danger); font-size: .875rem; margin: .25rem 0 0; }

/* ---------- ボタン ---------- */
.btn {
  font: inherit; font-size: .9rem; font-weight: 600;
  padding: .5rem .95rem; border-radius: 9px; border: 1px solid transparent;
  cursor: pointer; transition: .15s; white-space: nowrap;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.07); }
.btn.ghost { background: transparent; color: var(--muted); border-color: var(--border); }
.btn.ghost:hover { background: var(--surface-2); color: var(--text); }
.btn.danger { background: transparent; color: var(--danger); border-color: var(--danger); }
.btn.danger:hover { background: var(--danger); color: #fff; }
.icon-btn {
  background: none; border: none; color: var(--muted); font-size: 1.1rem;
  cursor: pointer; padding: .25rem .5rem; border-radius: 6px;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

input, textarea {
  font: inherit; width: 100%; padding: .55rem .7rem;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: 9px;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }

/* ---------- ログイン ---------- */
.login { min-height: 100dvh; display: grid; place-items: center; padding: 1.5rem; }
.login-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  box-shadow: var(--shadow); padding: 2.2rem; width: min(360px, 100%);
  display: grid; gap: .8rem; text-align: center;
}
.login-emoji { font-size: 2.6rem; }
.login-card h1 { font-size: 1.35rem; }

/* ---------- ヘッダー ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding: .8rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; font-size: 1.05rem; display: flex; gap: .45rem; align-items: center; }
.stats { color: var(--muted); font-size: .82rem; display: flex; gap: .9rem; flex-wrap: wrap; }
.topbar-actions { margin-left: auto; display: flex; gap: .5rem; }

/* ---------- レイアウト ---------- */
.layout {
  display: grid; grid-template-columns: 230px minmax(0, 1fr);
  gap: 1.75rem; max-width: 1080px; margin: 0 auto; padding: 1.5rem 1.25rem 4rem;
}
.sidebar { position: sticky; top: 76px; align-self: start; display: grid; gap: 1.25rem; }

/* 絞り込み（月・タグ）: PC では常時展開、スマホでは折りたたむ */
#filters { display: grid; gap: 1.25rem; }
#filters > summary {
  display: none; cursor: pointer; list-style: none;
  font-size: .85rem; font-weight: 600; color: var(--muted);
  padding: .55rem .8rem; border: 1px solid var(--border); border-radius: 9px;
  background: var(--surface);
}
#filters > summary::-webkit-details-marker { display: none; }
#filters > summary::after { content: " ▾"; }
#filters[open] > summary::after { content: " ▴"; }
.filter-block h3 { font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-bottom: .5rem; }
.chips { display: flex; flex-wrap: wrap; gap: .35rem; }
.chip {
  font: inherit; font-size: .8rem; cursor: pointer;
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
  padding: .2rem .6rem; border-radius: 999px; transition: .15s;
}
.chip:hover { border-color: var(--accent); color: var(--text); }
.chip.on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); font-weight: 600; }
.chip .n { opacity: .6; margin-left: .3rem; font-size: .72rem; }

.active-filter { margin-bottom: 1rem; font-size: .85rem; color: var(--muted); display: flex; align-items: center; gap: .5rem; }

/* ---------- 一覧 ---------- */
.list { display: grid; gap: .85rem; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1rem 1.15rem; cursor: pointer; transition: .15s; box-shadow: var(--shadow);
}
.card:hover { border-color: var(--accent); transform: translateY(-1px); }
.card-head { display: flex; align-items: baseline; gap: .6rem; flex-wrap: wrap; }
.card-date { font-size: .78rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.card-mood { font-size: 1rem; }
.card h2 { font-size: 1rem; margin: .15rem 0 .3rem; }
.card p { margin: 0; color: var(--muted); font-size: .88rem;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; white-space: pre-wrap; }
.card-tags { display: flex; gap: .3rem; flex-wrap: wrap; margin-top: .6rem; }
.tag { font-size: .72rem; color: var(--accent); background: var(--accent-soft); padding: .1rem .5rem; border-radius: 999px; }
.empty { text-align: center; color: var(--muted); padding: 4rem 1rem; }
.empty p:first-child { font-size: 2.5rem; margin: 0 0 .5rem; }
.more { width: 100%; margin-top: 1rem; }

/* ---------- エディタ ---------- */
.backdrop { position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 40; animation: fade .15s; }
@keyframes fade { from { opacity: 0 } }
.editor {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 50;
  width: min(560px, 100%); background: var(--surface);
  border-left: 1px solid var(--border); box-shadow: var(--shadow);
  animation: slide .2s ease-out;
}
@keyframes slide { from { transform: translateX(24px); opacity: .5 } }
@media (max-width: 620px) { .editor { width: 100%; } }
#editor-form { height: 100%; display: flex; flex-direction: column; gap: .85rem; padding: 1.25rem; overflow: auto; }
.editor-head { display: flex; align-items: center; justify-content: space-between; }
.editor-head h2 { font-size: 1.05rem; }
#editor-form label { display: grid; gap: .3rem; font-size: .8rem; color: var(--muted); font-weight: 600; }
#editor-form label.grow { flex: 1; min-height: 220px; }
#f-body { height: 100%; min-height: 200px; resize: vertical; line-height: 1.8; }
.moods { display: flex; gap: .35rem; }
.moods button {
  font-size: 1.3rem; background: var(--surface); border: 1px solid var(--border);
  border-radius: 9px; padding: .2rem .5rem; cursor: pointer; transition: .15s; filter: grayscale(1); opacity: .55;
}
.moods button:hover { opacity: 1; filter: none; }
.moods button.on { opacity: 1; filter: none; border-color: var(--accent); background: var(--accent-soft); }
.editor-actions { display: flex; gap: .5rem; align-items: center; padding-top: .25rem; }
.spacer { flex: 1; }

/* ---------- トースト ---------- */
.toast {
  position: fixed; bottom: 1.5rem; left: 50%; transform: translateX(-50%); z-index: 60;
  background: var(--text); color: var(--bg); padding: .55rem 1.1rem;
  border-radius: 999px; font-size: .85rem; box-shadow: var(--shadow); animation: fade .15s;
}

/* ---------- スマートフォン ---------- */
@media (max-width: 760px) {
  .layout {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 1rem .9rem calc(3rem + env(safe-area-inset-bottom));
  }
  .sidebar { position: static; gap: .75rem; }
  #filters > summary { display: block; }

  /* ヘッダーを2行に収める: [ブランド][ボタン] / [統計] */
  .topbar { padding: .6rem .9rem; gap: .5rem .75rem; }
  .brand { order: 1; font-size: 1rem; }
  .topbar-actions { order: 2; margin-left: auto; gap: .4rem; }
  .stats { order: 3; flex-basis: 100%; gap: .75rem; font-size: .78rem; }

  /* 16px 未満だと iOS がフォーカス時に勝手にズームするため */
  input, textarea { font-size: 16px; }
  .btn { padding: .6rem .9rem; min-height: 44px; }
  .chip { padding: .35rem .7rem; font-size: .82rem; }
  .card { padding: .9rem 1rem; }
}

@media (max-width: 620px) {
  #editor-form { padding: 1rem; gap: .7rem; }
  #editor-form label.grow { min-height: 160px; }
  .moods button { font-size: 1.5rem; padding: .3rem .55rem; }

  /* 保存・削除を常に指の届く位置に固定する */
  .editor-actions {
    position: sticky; bottom: 0; z-index: 1;
    margin: auto -1rem -1rem;
    padding: .7rem 1rem calc(.7rem + env(safe-area-inset-bottom));
    background: var(--surface); border-top: 1px solid var(--border);
  }
}

/* 画面幅が狭いときはヘッダーのボタンをアイコンだけにする */
.btn-icon { display: none; }
@media (max-width: 560px) {
  .btn-label { display: none; }
  .btn-icon  { display: inline; }
  .topbar-actions .btn { padding: .5rem .8rem; font-size: 1.05rem; line-height: 1.2; }
}