:root {
  --ink: #211e18;
  --muted: #716a5e;
  --paper: #f5f0e5;
  --line: #cbbd9f;
  --accent: #704523;
  --good: #41663f;
  --warn: #8a5a18;
}

* { box-sizing: border-box; }

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  color: var(--ink);
  background: #d7cfbf;
  font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}

.viewer-bar {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(190px, 0.72fr) minmax(460px, 1.9fr);
  grid-template-areas: "heading controls" "heading status";
  gap: 8px 24px;
  padding: 14px clamp(16px, 3vw, 40px) 12px;
  border-bottom: 1px solid #9f8c6c;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.32), transparent 38%), var(--paper);
  box-shadow: 0 5px 18px rgba(45, 36, 23, 0.16);
}

.viewer-heading { grid-area: heading; align-self: center; }
.viewer-kicker { margin-bottom: 2px; color: var(--accent); font: 700 10px/1.2 Georgia, serif; letter-spacing: 0.18em; }
.viewer-heading h1 { margin: 0; font: 700 clamp(18px, 2vw, 25px)/1.25 Georgia, "Songti SC", serif; }

.viewer-controls {
  grid-area: controls;
  display: grid;
  grid-template-columns: minmax(190px, 1.25fr) minmax(230px, 1.4fr) auto;
  gap: 10px;
  align-items: end;
}

.viewer-controls label { display: grid; gap: 4px; }
.viewer-controls label > span { color: var(--muted); font-size: 11px; }

select,
button,
.viewer-actions a {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--ink);
  background: #fffdf8;
  font: inherit;
}

select { width: 100%; padding: 4px 30px 4px 9px; }

button,
.viewer-actions a {
  display: inline-grid;
  place-items: center;
  padding: 4px 10px;
  text-decoration: none;
  cursor: pointer;
}

button:hover,
.viewer-actions a:hover { border-color: var(--accent); color: #fff; background: var(--accent); }
button:disabled { cursor: default; opacity: 0.4; }

.viewer-actions { display: flex; gap: 5px; }
.viewer-actions button { width: 34px; padding: 0; font-size: 23px; line-height: 1; }
.viewer-actions a { white-space: nowrap; font-size: 13px; }

.viewer-status {
  grid-area: status;
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
}

#version-status { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.status-chip {
  flex: none;
  padding: 2px 7px;
  border: 1px solid #abc0a8;
  border-radius: 999px;
  color: var(--good);
  background: #f4fbf2;
}

.status-chip.has-missing { border-color: #dbc08e; color: var(--warn); background: #fff8e9; }
.viewer-stage { min-height: 0; flex: 1; padding: 10px; }

#archive-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 1px solid #a89b83;
  border-radius: 3px;
  background: #fff;
  box-shadow: 0 3px 14px rgba(37, 30, 20, 0.15);
}

.noscript { position: fixed; inset: 20px; z-index: 5; padding: 20px; background: #fff; }

@media (max-width: 850px) {
  .viewer-bar {
    grid-template-columns: 1fr;
    grid-template-areas: "heading" "controls" "status";
    gap: 8px;
    padding-top: 10px;
  }
  .viewer-kicker { display: none; }
  .viewer-controls { grid-template-columns: 1fr 1.2fr auto; }
}

@media (max-width: 620px) {
  .viewer-controls { grid-template-columns: 1fr; }
  .viewer-actions { justify-content: flex-end; }
  .viewer-status { display: none; }
  .viewer-stage { padding: 5px; }
}