:root {
  --primary: #24396b;
  --primary-dark: #1b2b50;
  --success: #3fa968;
  --success-soft: #ebf6ef;
  --accent: #e29578;
  --canvas: #faf7f0;
  --surface: #ffffff;
  --border: #e8e2d2;
  --rule: #e2dbd0;
  --text: #2b2d42;
  --text-muted: #6b7280;
  --linen: #ede8dc;
  --danger: #ba1a1a;
  --danger-soft: #ffdad6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--text);
  font-family: "Inter", "Hiragino Sans", "Noto Sans JP", sans-serif;
}

h1, h2, .serif {
  font-family: "Noto Serif JP", "Hiragino Mincho ProN", serif;
  margin: 0;
}

.shell {
  display: flex;
  min-height: 100vh;
}

/* ---- Sidebar ---- */
nav.rail {
  width: 260px;
  flex: none;
  background: var(--primary);
  color: #fff;
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px 22px;
}
.brand-mark {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: var(--canvas);
  color: var(--primary);
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex: none;
}
.brand-name { font-family: "Noto Serif JP", serif; font-weight: 700; font-size: 1.02rem; }
.brand-sub { font-size: 0.72rem; color: #c3cce3; }

.nav-item {
  all: unset;
  cursor: pointer;
  padding: 11px 14px;
  border-radius: 10px;
  font-size: 0.9rem;
  color: #d1d7e6;
  box-sizing: border-box;
}
.nav-item:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav-item.active {
  background: var(--primary-dark);
  color: #fff;
  font-weight: 600;
  border-left: 3px solid var(--accent);
  padding-left: 11px;
}

/* ---- Main ---- */
main {
  flex: 1;
  min-width: 0;
  padding: 40px clamp(20px, 4vw, 56px);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-head p { margin: 6px 0 0; color: var(--text-muted); font-size: 0.92rem; }
.page-head h1 { font-size: 1.7rem; text-wrap: balance; }

.summary-badges { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.summary-badges span {
  font-size: 0.8rem;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--linen);
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.summary-badges span.done { background: var(--success-soft); color: #2d804e; }
.summary-badges span.due { background: #fbebe8; color: #d96b43; }

.grid-2 {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(340px, 1.4fr);
  gap: 20px;
  align-items: start;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
  box-shadow: 0 2px 8px -2px rgba(43,45,66,0.04), 0 1px 3px 0 rgba(43,45,66,0.02);
}
.panel-title { font-size: 1.02rem; margin-bottom: 14px; }

/* ---- Forms ---- */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.required { color: var(--danger); }
input, textarea, select {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 9px 11px;
}
textarea { resize: vertical; font-family: inherit; }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(36,57,107,0.12);
}

.btn {
  all: unset;
  cursor: pointer;
  box-sizing: border-box;
  text-align: center;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 10px 18px;
  border-radius: 8px;
}
.btn.block { display: block; width: 100%; }
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.outline { background: var(--surface); color: var(--primary); border: 1.5px solid var(--rule); }
.btn.outline:hover { background: var(--canvas); border-color: var(--primary); }

.error-text { color: var(--danger); font-size: 0.82rem; margin: 10px 0 0; }
.hint-text { color: var(--text-muted); font-size: 0.8rem; }

/* ---- Task list ---- */
.controls-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.chip-group { display: flex; gap: 6px; }
.chip {
  all: unset;
  cursor: pointer;
  font-size: 0.8rem;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  box-sizing: border-box;
}
.chip.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.sort-select { display: flex; align-items: center; gap: 8px; font-size: 0.8rem; color: var(--text-muted); }
.sort-select select { padding: 6px 8px; }

ul.task-list, ul.report-task-list { list-style: none; margin: 0; padding: 0; }
.task-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 4px;
  border-top: 1px solid var(--rule);
}
.task-row:first-child { border-top: none; }
.task-row.done .task-name { color: var(--text-muted); text-decoration: line-through; text-decoration-color: var(--border); }

.check {
  appearance: none; -webkit-appearance: none;
  width: 20px; height: 20px;
  border-radius: 6px;
  border: 1.5px solid var(--border);
  background: var(--canvas);
  margin-top: 2px;
  flex: none;
  cursor: pointer;
  position: relative;
}
.check:checked { background: var(--success); border-color: var(--success); }
.check:checked::after {
  content: "";
  position: absolute; left: 5px; top: 1px;
  width: 6px; height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(40deg);
}

.task-body { flex: 1; min-width: 0; }
.task-top { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.task-name { font-weight: 500; }
.task-memo { margin: 3px 0 0; color: var(--text-muted); font-size: 0.84rem; }
.badge {
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--linen);
  color: var(--text);
  white-space: nowrap;
}
.badge.overdue { background: var(--danger-soft); color: #93000a; }
.badge.done { background: var(--success-soft); color: #2d804e; }

.del-btn {
  all: unset;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: 6px 8px;
  border-radius: 6px;
  flex: none;
}
.del-btn:hover { background: var(--linen); color: var(--text); }

.empty-state { text-align: center; color: var(--text-muted); padding: 28px 10px; font-size: 0.88rem; }

/* ---- Report ---- */
.report-controls { display: flex; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 4px; }

.report-task-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 4px;
  border-top: 1px solid var(--rule);
}
.report-task-row:first-child { border-top: none; }

.paper-panel { display: flex; flex-direction: column; gap: 14px; }
.paper-head { display: flex; justify-content: space-between; align-items: baseline; font-size: 0.85rem; color: var(--text-muted); }
.paper {
  background: var(--canvas);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px;
  background-image: repeating-linear-gradient(to bottom, transparent, transparent 29px, var(--rule) 30px);
}
.paper textarea {
  width: 100%;
  background: transparent;
  border: none;
  padding: 0;
  font-family: "Noto Serif JP", serif;
  font-size: 0.95rem;
  line-height: 30px;
  color: var(--text);
  min-height: 320px;
}
.paper textarea:focus { outline: none; box-shadow: none; }

.fixed-fields {
  display: flex;
  gap: 22px;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.fixed-fields b { color: var(--text); font-weight: 600; margin-left: 6px; }

.send-row { display: flex; gap: 12px; flex-wrap: wrap; }

@media (max-width: 860px) {
  .shell { flex-direction: column; }
  nav.rail { width: 100%; flex-direction: row; align-items: center; overflow-x: auto; }
  .brand { padding: 4px 8px; }
  .brand-sub { display: none; }
  .grid-2 { grid-template-columns: 1fr; }
  main { padding: 24px 16px 48px; }
}