/* ===== デザイントークン ===== */
:root {
  --bg: #eef1f8;
  --bg-tint-a: rgba(99, 102, 241, 0.16);
  --bg-tint-b: rgba(56, 189, 248, 0.14);
  --panel: rgba(255, 255, 255, 0.82);
  --panel-solid: #ffffff;
  --field: rgba(255, 255, 255, 0.7);
  --text: #10131f;
  --muted: #6a7185;
  --faint: #99a0b3;
  --line: rgba(16, 19, 31, 0.09);
  --line-strong: rgba(16, 19, 31, 0.16);

  --accent: #5b5bf0;
  --accent-2: #8b5cf6;
  --sky: #0ea5e9;
  --green: #10b981;
  --amber: #f59e0b;
  --danger: #ef4444;

  --shadow-sm: 0 1px 2px rgba(16, 19, 31, .05), 0 4px 14px rgba(16, 19, 31, .05);
  --shadow-md: 0 2px 6px rgba(16, 19, 31, .06), 0 18px 40px -18px rgba(16, 19, 31, .28);
  --shadow-accent: 0 8px 22px -10px rgba(91, 91, 240, .75);

  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --ease: cubic-bezier(.22, .8, .3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d16;
    --bg-tint-a: rgba(99, 102, 241, 0.24);
    --bg-tint-b: rgba(14, 165, 233, 0.16);
    --panel: rgba(23, 26, 40, 0.72);
    --panel-solid: #171a28;
    --field: rgba(10, 12, 20, 0.5);
    --text: #eef1fa;
    --muted: #98a0b8;
    --faint: #6f7791;
    --line: rgba(255, 255, 255, 0.09);
    --line-strong: rgba(255, 255, 255, 0.18);

    --accent: #7c7cf7;
    --accent-2: #a78bfa;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 18px rgba(0, 0, 0, .3);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, .35), 0 22px 46px -20px rgba(0, 0, 0, .8);
    --shadow-accent: 0 8px 24px -10px rgba(124, 124, 247, .7);
  }
}

* { box-sizing: border-box; }

/* ===== ベース ===== */
body {
  margin: 0;
  padding: 0 20px 72px;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(760px 420px at 12% -8%, var(--bg-tint-a), transparent 62%),
    radial-gradient(700px 400px at 92% 4%, var(--bg-tint-b), transparent 60%),
    var(--bg);
  background-attachment: fixed;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", "Yu Gothic UI",
    "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  font-feature-settings: "palt" 1;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

main { max-width: 780px; margin: 0 auto; }

/* ===== ヘッダー ===== */
.site-header {
  max-width: 780px;
  margin: 0 auto;
  padding: 40px 0 26px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: none;
  border-radius: var(--radius-md);
  color: #fff;
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  box-shadow: var(--shadow-accent);
}
.brand-mark svg { width: 24px; height: 24px; }
.site-header h1 {
  margin: 0;
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: .02em;
  background: linear-gradient(100deg, var(--text) 30%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.subtitle {
  margin: 1px 0 0;
  color: var(--muted);
  font-size: .82rem;
  letter-spacing: .06em;
}

/* ===== ダッシュボード ===== */
.dashboard {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 26px;
}
.stat {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 20px 14px 18px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
  transition: transform .28s var(--ease), box-shadow .28s var(--ease);
}
.stat::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--tone), transparent);
  opacity: .9;
}
.stat:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

.stat-memo { --tone: var(--accent); }
.stat-task { --tone: var(--sky); }
.stat-done { --tone: var(--green); }
.stat-open { --tone: var(--amber); }

.stat-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  color: var(--tone);
  background: color-mix(in srgb, var(--tone) 14%, transparent);
}
.stat-icon svg { width: 18px; height: 18px; }

.stat-label {
  color: var(--muted);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .12em;
}
.stat-figure { display: flex; align-items: baseline; gap: 5px; }
.stat-value {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--tone);
}
.stat-unit { color: var(--faint); font-size: .78rem; }

/* ===== ダッシュボード: 最新の振り返り ===== */
.latest-review {
  --tone: var(--accent-2);
  position: relative;
  overflow: hidden;
  margin-bottom: 26px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(120deg, color-mix(in srgb, var(--tone) 9%, transparent), transparent 55%),
    var(--panel);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
}
.latest-review::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(var(--accent), var(--accent-2));
}
.latest-head { display: flex; align-items: center; gap: 12px; }
.latest-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: 11px;
  color: var(--tone);
  background: color-mix(in srgb, var(--tone) 14%, transparent);
}
.latest-icon svg { width: 18px; height: 18px; }
.latest-label {
  display: block;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .12em;
}
.latest-week {
  display: block;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: .01em;
  font-variant-numeric: tabular-nums;
}
.latest-comment {
  margin: 12px 0 0;
  font-size: .95rem;
  white-space: pre-wrap;
  word-break: break-word;
}
.latest-comment.is-empty { color: var(--faint); font-size: .88rem; }
.latest-meta {
  margin: 10px 0 0;
  color: var(--faint);
  font-size: .74rem;
  letter-spacing: .03em;
  font-variant-numeric: tabular-nums;
}
.latest-meta:empty { display: none; }

/* ===== パネル ===== */
.columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
}
.panel {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
}
.panel h2 {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 26px 0 12px;
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .04em;
}
.panel h2::before {
  content: "";
  width: 3px;
  height: 15px;
  border-radius: 2px;
  background: linear-gradient(var(--accent), var(--accent-2));
}
.panel h2:first-child { margin-top: 0; }
.count { color: var(--faint); font-weight: 500; font-size: .78rem; }

/* ===== フォーム ===== */
.form { display: flex; flex-direction: column; gap: 10px; margin-bottom: 4px; }
.form-inline { flex-direction: row; }
.form-inline input { flex: 1; min-width: 0; }

input[type="text"], textarea, select {
  width: 100%;
  padding: 11px 14px;
  color: var(--text);
  background-color: var(--field);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  font: inherit;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}
input[type="text"]::placeholder, textarea::placeholder { color: var(--faint); }
input[type="text"]:focus, textarea:focus, select:focus {
  outline: none;
  background-color: var(--panel-solid);
  border-color: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent);
}
textarea { resize: vertical; min-height: 96px; line-height: 1.6; }

select {
  appearance: none;
  cursor: pointer;
  font-variant-numeric: tabular-nums;
  padding-right: 40px;
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%),
    linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: calc(100% - 21px) calc(50% + 1px), calc(100% - 16px) calc(50% + 1px);
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}
select option { color: var(--text); background: var(--panel-solid); }

.hint {
  margin: 8px 0 0;
  color: var(--faint);
  font-size: .76rem;
  letter-spacing: .02em;
}

button {
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border: none;
  border-radius: var(--radius-sm);
  padding: 11px 20px;
  color: #fff;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  box-shadow: var(--shadow-accent);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), filter .18s var(--ease);
}
button:hover { transform: translateY(-1px); filter: brightness(1.07); }
button:active { transform: translateY(0); box-shadow: none; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ===== 一覧 ===== */
.list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.list li {
  position: relative;
  padding: 14px 16px 13px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel-solid);
  box-shadow: var(--shadow-sm);
  animation: rise .32s var(--ease) both;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.list li::before {
  content: "";
  position: absolute;
  left: 0; top: 12px; bottom: 12px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(var(--accent), var(--accent-2));
  opacity: .85;
}
.list li:hover { transform: translateX(2px); box-shadow: var(--shadow-md); border-color: var(--line-strong); }

@keyframes rise {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

.item-title { font-weight: 700; letter-spacing: .01em; word-break: break-word; }
.item-body {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: .92rem;
  white-space: pre-wrap;
  word-break: break-word;
}
.item-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 9px;
  color: var(--faint);
  font-size: .74rem;
  letter-spacing: .03em;
  font-variant-numeric: tabular-nums;
}

/* ===== タスク ===== */
.task { display: flex; align-items: flex-start; gap: 12px; }
.task-main { flex: 1; min-width: 0; }
.task input[type="checkbox"] {
  width: 19px;
  height: 19px;
  margin: 3px 0 0;
  flex: none;
  accent-color: var(--accent);
  cursor: pointer;
}
.task.done { background: color-mix(in srgb, var(--green) 6%, var(--panel-solid)); }
.task.done::before { background: linear-gradient(var(--green), #34d399); }
.task.done .item-title { color: var(--muted); text-decoration: line-through; text-decoration-thickness: 1.5px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--tone);
  background: color-mix(in srgb, var(--tone) 13%, transparent);
  border: 1px solid color-mix(in srgb, var(--tone) 32%, transparent);
}
.badge::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: currentColor;
}
.badge-done { --tone: var(--green); }
.badge-open { --tone: var(--amber); }

.btn-delete {
  align-self: center;
  padding: 6px 13px;
  font-size: .76rem;
  font-weight: 600;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line-strong);
  box-shadow: none;
}
.btn-delete:hover {
  color: #fff;
  background: var(--danger);
  border-color: var(--danger);
  filter: none;
  box-shadow: 0 6px 16px -8px var(--danger);
}

/* ===== 空の状態 ===== */
.empty {
  margin: 2px 0 0;
  padding: 18px;
  color: var(--faint);
  font-size: .85rem;
  text-align: center;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-md);
}

/* ===== トースト ===== */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 10;
  transform: translateX(-50%) translateY(14px) scale(.97);
  padding: 11px 20px;
  color: #fff;
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .02em;
  background: linear-gradient(120deg, #171a28, #262b43);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 999px;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity .24s var(--ease), transform .24s var(--ease);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }

/* ===== 中くらいの画面: 4項目が窮屈になるので 2 列に ===== */
@media (max-width: 820px) {
  .dashboard { grid-template-columns: repeat(2, 1fr); }
}

/* ===== 狭い画面 ===== */
@media (max-width: 640px) {
  body { padding: 0 14px 56px; }
  .site-header { padding: 26px 0 20px; }
  .dashboard { grid-template-columns: 1fr; gap: 10px; }
  .stat { flex-direction: row; justify-content: center; padding: 14px; }
  .stat-value { font-size: 1.7rem; }
  .panel { padding: 18px; }
  .form-inline { flex-direction: column; }
}