:root {
  color-scheme: light;
  --paper: #f3eddf;
  --paper-deep: #e5dac4;
  --card: #fffaf0;
  --ink: #252820;
  --muted: #6e6b5e;
  --green: #2f5b46;
  --green-dark: #1f4032;
  --cinnabar: #a74331;
  --ochre: #b7833e;
  --line: #cfc2aa;
  --shadow: 0 16px 50px rgb(55 45 30 / 10%);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, transparent 0 58px, rgb(167 67 49 / 13%) 58px 60px, transparent 60px),
    repeating-linear-gradient(0deg, rgb(76 91 72 / 5%) 0 1px, transparent 1px 32px),
    var(--paper);
  font-family: "FangSong", "STFangsong", "Microsoft YaHei", sans-serif;
}

button, input, select { font: inherit; }
button { color: inherit; }

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .26;
  background-image:
    radial-gradient(circle at 20% 30%, rgb(89 73 45 / 12%) 0 1px, transparent 1.5px),
    radial-gradient(circle at 70% 70%, rgb(89 73 45 / 9%) 0 1px, transparent 1.5px);
  background-size: 17px 19px, 23px 29px;
}

.workbench {
  width: min(1280px, calc(100% - 48px));
  margin: 0 auto;
  padding: 42px 0 72px;
}

.masthead {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  padding: 20px 0 30px;
  border-bottom: 3px double var(--green);
}

.brand-lockup { display: flex; align-items: center; gap: 18px; }
.seal {
  display: grid;
  place-items: center;
  width: 70px;
  height: 70px;
  border: 2px solid var(--cinnabar);
  outline: 1px solid rgb(167 67 49 / 45%);
  outline-offset: -6px;
  color: var(--cinnabar);
  font: 700 24px/1.05 "KaiTi", "STKaiti", serif;
  transform: rotate(-2deg);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--green);
  font: 700 11px/1.2 ui-monospace, "Cascadia Mono", monospace;
  letter-spacing: .17em;
}

h1 {
  margin: 0;
  font: 700 clamp(44px, 6.5vw, 78px)/.92 "KaiTi", "STKaiti", serif;
  letter-spacing: -.08em;
}

.subtitle { margin: 10px 0 0; color: var(--muted); font-size: 16px; letter-spacing: .18em; }
.release { display: grid; min-width: 164px; text-align: right; }
.release span { color: var(--cinnabar); font: 700 12px/1 ui-monospace, monospace; letter-spacing: .12em; }
.release strong { margin-top: 8px; font: 600 34px/1 "Times New Roman", serif; }
.release small { margin-top: 7px; color: var(--muted); }

.intro {
  display: grid;
  grid-template-columns: minmax(320px, .9fr) minmax(320px, 1.1fr);
  gap: 60px;
  align-items: end;
  padding: 44px 0 34px;
}

.section-index { margin: 0 0 10px; color: var(--cinnabar); font: 700 12px/1 ui-monospace, monospace; }
.intro h2 { margin: 0; font: 600 clamp(28px, 3.5vw, 46px)/1.2 "STSong", "SimSun", serif; }
.intro > p { margin: 0; color: #4f5148; font-size: 16px; line-height: 1.9; }

.category-rail {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--green);
  background: rgb(255 250 240 / 55%);
}

.category {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 12px;
  min-height: 90px;
  border: 0;
  border-right: 1px solid var(--line);
  padding: 18px 20px;
  text-align: left;
  background: transparent;
  cursor: pointer;
  transition: .2s ease;
}

.category:last-child { border-right: 0; }
.category span { font: 700 23px/1.2 "STSong", "SimSun", serif; }
.category b { color: var(--cinnabar); font: 700 18px/1 ui-monospace, monospace; }
.category small { grid-column: 1 / -1; color: var(--muted); }
.category::after { content: ""; position: absolute; inset: auto 18px 9px; height: 3px; background: transparent; }
.category:hover, .category.is-active { color: white; background: var(--green); }
.category:hover small, .category.is-active small, .category:hover b, .category.is-active b { color: #f2d596; }
.category.is-active::after { background: #f2d596; }
.category.is-planned:not(.is-active) { opacity: .72; }

.control-deck {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) 180px 180px 110px;
  gap: 12px;
  margin: 22px 0 26px;
  padding: 15px;
  border: 1px solid var(--line);
  background: rgb(255 250 240 / 68%);
  box-shadow: 0 8px 28px rgb(61 48 28 / 5%);
}

.control-deck label, .visible-count { display: grid; gap: 7px; }
.control-deck label > span, .visible-count > span { color: var(--muted); font-size: 12px; }
input, select {
  width: 100%;
  min-height: 43px;
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 0 12px;
  color: var(--ink);
  background: var(--card);
  outline: none;
}
input:focus, select:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgb(47 91 70 / 12%); }
.visible-count { place-items: end center; border-left: 1px dashed var(--line); }
.visible-count strong { color: var(--green); font: 700 32px/1 "Times New Roman", serif; }

.notes { display: grid; gap: 26px; }
.note-card {
  display: grid;
  grid-template-columns: minmax(240px, 31%) 1fr;
  min-width: 0;
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.map-preview {
  position: relative;
  min-height: 520px;
  margin: 0;
  padding: 20px;
  background: linear-gradient(145deg, #dfe7dd, #c7d2c4);
}
.map-preview img { width: 100%; height: 100%; max-height: 590px; object-fit: contain; filter: drop-shadow(0 8px 16px rgb(34 43 34 / 18%)); }
.map-preview figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 9px 14px;
  color: white;
  background: var(--green-dark);
  font-size: 12px;
  letter-spacing: .08em;
}

.note-copy { display: flex; flex-direction: column; min-width: 0; padding: 28px 32px 30px; }
.card-meta { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 12px; }
.card-meta > span { border: 1px solid var(--line); padding: 5px 9px; }
.card-meta .approval { border-color: rgb(47 91 70 / 45%); color: var(--green); background: rgb(47 91 70 / 7%); }
.sent-toggle { display: inline-flex; align-items: center; gap: 7px; margin-left: auto; cursor: pointer; }
.sent-toggle input { width: 16px; min-height: 16px; accent-color: var(--green); }
.lesson-name { margin: 24px 0 5px; color: var(--cinnabar); font: 700 13px/1 ui-monospace, monospace; letter-spacing: .12em; }
.note-copy h3 { margin: 0; font: 700 clamp(26px, 3vw, 40px)/1.25 "STSong", "SimSun", serif; }
.body-copy { margin-top: 22px; color: #44473f; font-size: 15px; line-height: 1.95; white-space: pre-line; }
.tag-copy { margin: 22px 0 0; color: var(--green); line-height: 1.85; overflow-wrap: anywhere; }
.actions { display: grid; grid-template-columns: 1fr 1.45fr; gap: 10px; margin-top: auto; padding-top: 26px; }
.actions button {
  min-height: 45px;
  border: 1px solid var(--green);
  background: transparent;
  cursor: pointer;
  transition: .18s ease;
}
.actions button:hover { color: white; background: var(--green); }
.actions .primary { color: white; background: var(--green); }
.actions .primary:hover { background: var(--cinnabar); border-color: var(--cinnabar); }
.note-card.is-sent { filter: saturate(.7); }
.note-card.is-sent .note-copy { background: #f1eee6; }

.empty { padding: 80px 20px; border: 1px dashed var(--line); text-align: center; background: rgb(255 250 240 / 48%); }
.empty span { font: 600 28px/1.2 "STSong", serif; }
.empty p { color: var(--muted); }
footer { display: flex; justify-content: space-between; gap: 24px; margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 20;
  transform: translate(-50%, 16px);
  padding: 11px 18px;
  color: white;
  background: var(--green-dark);
  box-shadow: 0 8px 30px rgb(22 35 27 / 24%);
  opacity: 0;
  pointer-events: none;
  transition: .2s ease;
}
.toast.show { transform: translate(-50%, 0); opacity: 1; }

@media (max-width: 900px) {
  body { background-position: -44px 0, 0 0, 0 0; }
  .workbench { width: min(100% - 22px, 720px); padding-top: 20px; }
  .masthead { align-items: flex-start; }
  .seal { width: 56px; height: 56px; font-size: 20px; }
  .intro { grid-template-columns: 1fr; gap: 16px; }
  .category-rail { grid-template-columns: repeat(2, 1fr); }
  .category:nth-child(2) { border-right: 0; }
  .category:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .control-deck { grid-template-columns: 1fr 1fr; }
  .search-box { grid-column: 1 / -1; }
  .visible-count { border-left: 0; border-top: 1px dashed var(--line); padding-top: 8px; }
  .note-card { grid-template-columns: 1fr; }
  .map-preview { min-height: 420px; }
}

@media (max-width: 560px) {
  .masthead { display: grid; }
  .release { min-width: 0; text-align: left; }
  .category-rail, .control-deck { grid-template-columns: 1fr; }
  .category { border-right: 0; border-bottom: 1px solid var(--line); }
  .category:last-child { border-bottom: 0; }
  .search-box { grid-column: auto; }
  .note-copy { padding: 24px 19px; }
  .map-preview { min-height: 360px; padding: 14px; }
  .card-meta { flex-wrap: wrap; }
  .sent-toggle { width: 100%; margin: 4px 0 0; }
  .actions { grid-template-columns: 1fr; }
  footer { display: grid; }
}