:root {
  --cream: #fffaf0;
  --paper: #fffdf7;
  --ink: #4a4032;
  --ink-soft: #7a6f5d;
  --blue: #4a7fb5;
  --blue-soft: #e4eefa;
  --blue-deep: #2f5d8a;
  --yellow: #f0b429;
  --yellow-soft: #fdf0d5;
  --line: #ecdfc8;
  --radius: 16px;
  --shadow: 0 4px 16px rgba(120, 96, 40, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Noto Sans TC", "PingFang TC", -apple-system, sans-serif;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.6;
}

.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }

.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--blue-deep); }
.site-header nav a {
  margin-left: 18px;
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.92rem;
}
.site-header nav a:hover { color: var(--blue-deep); }

.hero { text-align: center; padding: 48px 0 28px; }
.hero h1 { font-size: 1.6rem; margin: 0 0 10px; color: var(--blue-deep); }
.hero p { color: var(--ink-soft); margin: 0; }

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px;
  margin-bottom: 28px;
  scroll-margin-top: 80px;
}
.card h2 { margin-top: 0; color: var(--blue-deep); }
.hint { color: var(--ink-soft); font-size: 0.9rem; }

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.month-nav { display: flex; align-items: center; gap: 10px; }
#monthLabel { font-weight: 600; min-width: 90px; text-align: center; }

.legend { display: flex; gap: 14px; flex-wrap: wrap; margin: 10px 0 16px; font-size: 0.85rem; }
.legend span { display: inline-flex; align-items: center; gap: 6px; color: var(--ink-soft); }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}
.cal-dow { text-align: center; font-size: 0.8rem; color: var(--ink-soft); padding-bottom: 4px; }
.cal-day {
  min-height: 70px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 6px;
  background: #fff;
  cursor: pointer;
  font-size: 0.85rem;
}
.cal-day.empty { border-color: transparent; background: transparent; cursor: default; }
.cal-day.today { border-color: var(--blue); box-shadow: inset 0 0 0 1px var(--blue); }
.cal-day.selected { background: var(--blue-soft); }
.cal-day .num { font-weight: 600; }
.cal-day .dots { display: flex; gap: 3px; margin-top: 4px; flex-wrap: wrap; }

.day-detail {
  margin-top: 16px;
  padding: 14px;
  background: var(--yellow-soft);
  border-radius: 10px;
}
.day-detail.hidden, .hidden { display: none; }
.day-detail .ev-item { padding: 4px 0; }

.event-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 18px;
}
.field { display: flex; flex-direction: column; gap: 4px; }
.field.wide { grid-column: 1 / -1; }
.field label { font-size: 0.85rem; color: var(--ink-soft); }
input, select, textarea, button { font-family: inherit; font-size: 0.95rem; }
input, select, textarea {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}
.event-form .btn { grid-column: 1 / -1; justify-self: start; }
.form-msg { grid-column: 1 / -1; font-size: 0.85rem; }
.form-msg.error { color: #b3413c; }
.form-msg.ok { color: var(--blue-deep); }

.btn {
  border: none;
  border-radius: 999px;
  padding: 9px 20px;
  cursor: pointer;
  font-weight: 600;
}
.btn.primary { background: var(--blue); color: #fff; }
.btn.primary:hover { background: var(--blue-deep); }
.btn.ghost { background: var(--blue-soft); color: var(--blue-deep); padding: 6px 12px; }
.btn.small { padding: 4px 10px; font-size: 0.8rem; }

.progress-table { width: 100%; border-collapse: collapse; margin-top: 10px; }
.progress-table th { text-align: left; font-size: 0.8rem; color: var(--ink-soft); padding: 6px 8px; border-bottom: 1px solid var(--line); }
.progress-table td { padding: 8px; border-bottom: 1px solid var(--line); font-size: 0.9rem; }
.progress-table tr.done td { color: var(--ink-soft); text-decoration: line-through; }
.cat-tag { padding: 2px 8px; border-radius: 999px; font-size: 0.75rem; }

.chat-log { display: flex; flex-direction: column; gap: 10px; margin-bottom: 14px; max-height: 360px; overflow-y: auto; }
.chat-msg { padding: 10px 14px; border-radius: 12px; max-width: 80%; white-space: pre-wrap; font-size: 0.92rem; }
.chat-msg.user { align-self: flex-end; background: var(--blue-soft); color: var(--blue-deep); }
.chat-msg.assistant { align-self: flex-start; background: var(--yellow-soft); }
.chat-form { display: flex; gap: 10px; }
.chat-form textarea { flex: 1; resize: vertical; }

.suggestions { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 14px; }
.suggestion-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--blue-soft);
  border-radius: 10px;
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.site-footer { text-align: center; color: var(--ink-soft); padding: 30px 0; font-size: 0.85rem; }

@media (max-width: 600px) {
  .event-form { grid-template-columns: 1fr; }
  .site-header nav a { margin-left: 10px; font-size: 0.85rem; }
}