:root {
  --bg: #0f1115;
  --surface: #171a21;
  --surface-2: #1e222b;
  --border: #2a2f3a;
  --text: #e6e8ee;
  --muted: #8b92a3;
  --accent: #7aa2ff;
  --accent-ink: #0f1115;
  --danger: #ff7a7a;
  --high: #ff8a7a;
  --mid: #f2c46d;
  --low: #7fd1a8;
  --radius: 12px;
  --font: "Inter", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body { margin: 0; background: var(--bg); color: var(--text); }
body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
}
h1, h2 { margin: 0; font-weight: 600; letter-spacing: 0.01em; }
a { color: inherit; }
svg { width: 18px; height: 18px; flex: none; }
.muted { color: var(--muted); }

/* ---- 入力・ボタン ---- */
.input, .field input {
  width: 100%;
  min-width: 0;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  transition: border-color .15s;
}
.input:focus, .field input:focus { border-color: var(--accent); }
.input::placeholder { color: #626a7b; }
.select { width: auto; flex: none; appearance: none; padding-right: 28px;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 15px) 52%, calc(100% - 10px) 52%;
  background-size: 5px 5px; background-repeat: no-repeat; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 16px;
  font: inherit; font-weight: 600;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2); color: var(--text);
  cursor: pointer; white-space: nowrap;
  transition: background .15s, border-color .15s, opacity .15s;
}
.btn:hover { border-color: #3a4150; }
.btn:disabled { opacity: .55; cursor: default; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: #8fb1ff; border-color: #8fb1ff; }
.btn-block { width: 100%; }
.btn .ico { width: 16px; height: 16px; }

.icon-btn {
  display: inline-grid; place-items: center;
  width: 38px; height: 38px;
  background: transparent; color: var(--muted);
  border: 1px solid transparent; border-radius: 10px; cursor: pointer;
}
.icon-btn:hover { color: var(--text); background: var(--surface-2); }

.spinner {
  width: 16px; height: 16px; flex: none;
  border: 2px solid currentColor; border-right-color: transparent;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error-text { color: var(--danger); font-size: 13px; margin: 0; }

/* ---- ゲート ---- */
.gate { min-height: 100dvh; display: grid; place-items: center; padding: 24px; }
.gate-card {
  width: 100%; max-width: 380px;
  display: grid; gap: 16px;
  padding: 28px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
}
.gate-card p { margin: 0; font-size: 14px; }
.gate-icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 12px; background: var(--surface-2); color: var(--accent); }
.gate-icon svg { width: 22px; height: 22px; }
.field { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }

/* ---- トップバー ---- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px max(16px, env(safe-area-inset-left));
  background: rgba(15, 17, 21, .85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar h1 { font-size: 17px; }
.topbar-actions { display: flex; gap: 4px; }
.topbar .is-spinning svg { animation: spin .8s linear infinite; }

.container { max-width: 1200px; margin: 0 auto; padding: 20px 16px 48px; display: grid; gap: 20px; }

/* ---- 新規作成 ---- */
.new-task {
  display: grid; gap: 10px;
  padding: 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
}
.new-task-row { display: flex; gap: 10px; }

/* ---- バナー・ローディング ---- */
.banner {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 122, 122, .35);
  background: rgba(255, 122, 122, .08);
  color: #ffc2c2;
  border-radius: var(--radius);
  font-size: 14px;
}
.banner #banner-text { flex: 1; }
.banner-close { background: none; border: 0; color: inherit; font: inherit; font-size: 13px; cursor: pointer; opacity: .8; }
.loading { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 48px 0; color: var(--muted); }

/* ---- ボード ---- */
.board { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; align-items: start; }
.column { display: grid; gap: 10px; }
.column-head { display: flex; align-items: center; gap: 8px; padding: 0 4px; font-size: 13px; color: var(--muted); }
.column-head h2 { font-size: 13px; color: var(--text); }
.column-head .dot { width: 8px; height: 8px; border-radius: 50%; }
.column[data-status="進行中"] .dot { background: var(--accent); }
.column[data-status="未着手"] .dot { background: var(--muted); }
.column[data-status="完了"] .dot { background: var(--low); }
.column-empty { padding: 18px; text-align: center; font-size: 13px; color: #5d6474; border: 1px dashed var(--border); border-radius: var(--radius); }

.card {
  display: grid; gap: 10px;
  padding: 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  transition: opacity .15s, border-color .15s;
}
.card:hover { border-color: #353b48; }
.card.is-busy { opacity: .55; pointer-events: none; }
.card-title { margin: 0; font-size: 15px; font-weight: 500; word-break: break-word; }
.card[data-status="完了"] .card-title { color: var(--muted); text-decoration: line-through; text-decoration-color: #4a5060; }
.card-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; font-size: 12px; }

.badge { display: inline-flex; align-items: center; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; border: 1px solid; }
.badge[data-p="高"] { color: var(--high); border-color: rgba(255, 138, 122, .4); background: rgba(255, 138, 122, .08); }
.badge[data-p="中"] { color: var(--mid); border-color: rgba(242, 196, 109, .4); background: rgba(242, 196, 109, .08); }
.badge[data-p="低"] { color: var(--low); border-color: rgba(127, 209, 168, .4); background: rgba(127, 209, 168, .08); }

.meta-link { display: inline-flex; align-items: center; gap: 4px; color: var(--muted); text-decoration: none; }
.meta-link:hover { color: var(--text); }
.meta-link svg { width: 14px; height: 14px; }

.card-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 10px;
  font: inherit; font-size: 12px; font-weight: 600;
  color: var(--muted); background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 8px; cursor: pointer;
}
.chip:hover { color: var(--text); border-color: #3a4150; }
.chip svg { width: 14px; height: 14px; }
.chip[data-to="完了"]:hover { color: var(--low); }
.chip[data-to="進行中"]:hover { color: var(--accent); }

/* ---- レスポンシブ ---- */
@media (max-width: 860px) {
  .board { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .container { padding: 14px 12px 40px; gap: 14px; }
  .new-task-row { flex-wrap: wrap; }
  .new-task-row .btn { flex: 1; }
  .chip { padding: 8px 12px; }
}