:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --line: #d9e2ec;
  --line-strong: #b8c7d9;
  --text: #17202a;
  --muted: #64748b;
  --accent: #2563eb;
  --accent-soft: #e8f0ff;
  --good: #168a5f;
  --good-soft: #e7f7ef;
  --warn: #a15c00;
  --warn-soft: #fff4de;
  --bad: #c2413a;
  --bad-soft: #fff0ef;
  --shadow: 0 12px 32px rgba(22, 34, 51, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Noto Sans SC", system-ui, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f7fafc 0%, var(--bg) 100%);
}

button,
input,
select { font: inherit; }

button { -webkit-tap-highlight-color: transparent; }

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 44px;
  display: grid;
  gap: 14px;
}

.hero-card,
.calendar-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-card { padding: 24px; }
.calendar-card { padding: 22px 24px 24px; }

.hero-card::before,
.calendar-card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--good), #f59e0b);
}

.hero-top {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: start;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
}

.today-name {
  margin: 0;
  color: #0f172a;
  font-size: 4.8rem;
  line-height: 0.96;
  font-weight: 900;
  letter-spacing: 0;
}

.date-box {
  min-width: 166px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
  text-align: right;
}

.date-box span {
  display: block;
  color: var(--muted);
  margin-bottom: 6px;
}

.date-box strong {
  color: var(--text);
  font-size: 1.08rem;
  letter-spacing: 0;
}

.sync-bar {
  position: relative;
  z-index: 1;
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  width: fit-content;
  max-width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.92rem;
}

.sync-bar strong { color: var(--text); }
.sync-bar.is-ok { border-color: #abd9c6; background: var(--good-soft); color: #326d54; }
.sync-bar.is-syncing { border-color: #bdd0fb; background: var(--accent-soft); color: #315ea7; }
.sync-bar.is-warn { border-color: #f1ce91; background: var(--warn-soft); color: var(--warn); }
.sync-bar.is-bad { border-color: #f0b7b2; background: var(--bad-soft); color: var(--bad); }

.section-head {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: end;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.25;
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.month-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
}

.nav-btn {
  min-height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 9px 13px;
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 0.14s ease, border-color 0.14s ease, background 0.14s ease, box-shadow 0.14s ease;
}

.nav-btn:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  background: #f8fbff;
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.12);
}

.nav-btn:focus-visible,
.member-input:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.18);
  outline-offset: 2px;
}

.add-member-btn,
.export-btn {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.add-member-btn:hover,
.export-btn:hover {
  background: #1d4ed8;
  color: #fff;
}

.toggle-btn[data-state='open'] {
  border-color: #bdd0fb;
  background: var(--accent-soft);
  color: #1848a8;
}

.member-panel,
.month-grid-wrap {
  position: relative;
  z-index: 1;
  overflow: hidden;
  max-height: 1200px;
  opacity: 1;
  transform: translateY(0);
  transform-origin: top center;
  transition: max-height 0.32s ease, opacity 0.22s ease, transform 0.32s ease;
}

.member-panel.is-collapsed,
.month-grid-wrap.is-collapsed {
  max-height: 0;
  opacity: 0;
  transform: translateY(-6px);
}

.member-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  margin-bottom: 14px;
}

.member-input {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 9px 12px;
  background: var(--surface);
  color: var(--text);
}

.member-input::placeholder { color: var(--muted); }

.member-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}

.member-pill {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto auto;
  align-items: center;
  gap: 8px;
  min-height: 46px;
  padding: 8px 8px 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
}

.member-pill strong {
  min-width: 0;
  overflow: hidden;
  color: var(--text);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.member-pill[draggable='true'] { cursor: grab; }
.member-pill[draggable='true']:active { cursor: grabbing; }
.drag-handle { color: var(--muted); font-weight: 900; line-height: 1; }

.member-move-btn,
.delete-member-btn {
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--accent);
  cursor: pointer;
  font-weight: 900;
  line-height: 1;
}

.delete-member-btn { color: var(--bad); }
.member-move-btn:hover { border-color: var(--accent); background: var(--accent-soft); }
.delete-member-btn:hover { border-color: #e7a4a0; background: var(--bad-soft); }
.member-move-btn:disabled,
.delete-member-btn:disabled { cursor: not-allowed; opacity: 0.42; }

.month-grid {
  display: grid;
  gap: 8px;
}

.calendar-header-row,
.calendar-days-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
}

.calendar-weekday {
  color: var(--muted);
  text-align: center;
  font-size: 0.86rem;
  font-weight: 700;
  padding: 2px 0;
}

.calendar-day {
  min-width: 0;
  min-height: 96px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: inherit;
  text-align: left;
  cursor: pointer;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 6px;
  transition: transform 0.14s ease, border-color 0.14s ease, box-shadow 0.14s ease, background 0.14s ease;
}

.calendar-day:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  box-shadow: 0 8px 18px rgba(22, 34, 51, 0.08);
}

.calendar-day .day-num {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.calendar-day .day-name {
  min-width: 0;
  color: var(--text);
  font-size: 1rem;
  font-weight: 900;
  line-height: 1.18;
  overflow-wrap: anywhere;
}

.calendar-day .day-meta {
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 800;
}

.calendar-day.is-weekend { background: #f9fbff; }
.calendar-day.is-outside { opacity: 0.2; pointer-events: none; }
.calendar-day.is-today { border-color: var(--accent); box-shadow: inset 0 0 0 2px rgba(37, 99, 235, 0.22); background: var(--accent-soft); }
.calendar-day.is-selected { border-color: #17202a; box-shadow: 0 0 0 3px rgba(23, 32, 42, 0.1); }
.calendar-day.is-override { background: var(--good-soft); }
.calendar-day.is-override .day-meta { color: var(--good); }
.calendar-day.has-unavailable { background: var(--warn-soft); }
.calendar-day.has-unavailable .day-meta { color: var(--warn); }

.detail-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(220px, 0.8fr);
  gap: 12px;
}

.detail-main {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
}

.detail-date {
  color: var(--muted);
  font-size: 0.94rem;
  margin-bottom: 8px;
}

.detail-name {
  margin-bottom: 10px;
  color: var(--text);
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.detail-note {
  margin: 0;
  color: #40546c;
  line-height: 1.65;
}

.detail-prevnext {
  margin-top: 10px;
  color: var(--muted);
}

.detail-prevnext::before {
  content: '· ';
  color: var(--accent);
  font-weight: 900;
}

.detail-prevnext strong { color: var(--accent); }

.detail-side {
  display: grid;
  gap: 8px;
  align-content: start;
}

.detail-chip {
  min-height: 46px;
  padding: 12px 14px;
  border: 1px solid #bdd0fb;
  border-radius: 8px;
  background: var(--accent-soft);
  color: #1848a8;
  font-weight: 800;
}

.detail-chip.ghost {
  border-color: var(--line);
  background: var(--surface-soft);
  color: var(--muted);
}

.action-panel {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.action-group {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
}

.action-group label {
  display: block;
  margin-bottom: 10px;
  color: var(--text);
  font-weight: 800;
}

.inline-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 8px;
  align-items: center;
}

select.member-input {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) 17px, calc(100% - 13px) 17px;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 34px;
}

.empty-state {
  padding: 16px;
  color: var(--muted);
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  background: var(--surface-soft);
}

@media (max-width: 920px) {
  .app-shell { width: min(100% - 24px, 760px); }
  .section-head,
  .hero-top,
  .detail-grid,
  .action-panel { grid-template-columns: 1fr; }
  .month-nav { justify-content: stretch; }
  .month-nav .hint { flex-basis: 100%; }
  .nav-btn { flex: 1 1 calc(50% - 8px); }
  .detail-side { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  body { background: #f7fafc; }
  .app-shell {
    width: 100%;
    padding: 0 0 18px;
    gap: 10px;
  }
  .hero-card,
  .calendar-card {
    border-left: 0;
    border-right: 0;
    border-radius: 0;
    box-shadow: none;
  }
  .hero-card,
  .calendar-card { padding: 16px; }
  .today-name {
    font-size: 3.3rem;
    line-height: 1;
  }
  .date-box {
    min-width: 0;
    text-align: left;
  }
  .sync-bar {
    width: 100%;
    justify-content: space-between;
    font-size: 0.86rem;
  }
  .section-head {
    gap: 10px;
    margin-bottom: 14px;
  }
  .section-head h2 { font-size: 1.05rem; }
  .month-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }
  .month-nav .hint,
  .toggle-btn,
  .export-btn {
    grid-column: 1 / -1;
  }
  .nav-btn {
    min-width: 0;
    min-height: 44px;
    padding: 9px 10px;
    white-space: normal;
  }
  .member-form,
  .inline-controls,
  .member-list { grid-template-columns: 1fr; }
  .member-pill {
    grid-template-columns: auto minmax(0, 1fr) auto auto auto;
    width: 100%;
  }
  .calendar-header-row,
  .calendar-days-grid { gap: 4px; }
  .calendar-weekday { font-size: 0.74rem; }
  .calendar-day {
    min-height: 58px;
    padding: 7px 5px;
    gap: 3px;
  }
  .calendar-day .day-num { font-size: 0.75rem; }
  .calendar-day .day-name {
    font-size: 0.78rem;
    line-height: 1.08;
  }
  .calendar-day .day-meta { display: none; }
  .detail-name { font-size: 2.5rem; }
  .detail-side {
    grid-template-columns: 1fr;
  }
  .detail-chip {
    min-height: 40px;
    padding: 10px 12px;
  }
  .action-group { padding: 12px; }
}

@media (max-width: 420px) {
  .hero-card,
  .calendar-card { padding: 14px 12px; }
  .today-name { font-size: 2.8rem; }
  .calendar-header-row,
  .calendar-days-grid { gap: 3px; }
  .calendar-day {
    min-height: 52px;
    padding: 6px 4px;
  }
  .calendar-day .day-name { font-size: 0.72rem; }
}

@media print {
  body { background: #fff; }
  .app-shell { width: 100%; padding: 0; }
  .hero-card,
  .member-card,
  .detail-card,
  .month-nav { display: none; }
  .calendar-card {
    border: 0;
    box-shadow: none;
    padding: 0;
  }
  .calendar-day {
    min-height: 72px;
    box-shadow: none;
  }
}