/* ===== 色彩与字体 ===== */
:root {
  --bg: #f4efe6;
  --bg-2: #eae2d3;
  --ink: #1a1612;
  --ink-soft: #2f2620;
  --muted: #7a6b5f;
  --line: #d4c5a9;
  --line-soft: #e6dcc7;
  --panel: #fbf7ef;
  --panel-2: #fffdf7;
  --accent: #7d3c0d;
  --accent-dark: #5a2a08;
  --accent-soft: #e8d4b4;
  --soft: #f2e9d5;
  --danger: #a83429;
  --warn: #9c7018;
  --gold: #b88a3f;
  --shadow: 0 2px 8px rgba(90, 60, 20, 0.06), 0 12px 28px rgba(90, 60, 20, 0.08);
  --shadow-sm: 0 1px 3px rgba(90, 60, 20, 0.05);
  --font-serif: "Source Han Serif SC", "Noto Serif CJK SC", "PingFang SC", "Songti SC", "SimSun", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-sans);
  background:
    radial-gradient(ellipse 1200px 800px at 10% -10%, rgba(184, 138, 63, 0.08), transparent 60%),
    radial-gradient(ellipse 900px 700px at 100% 10%, rgba(125, 60, 13, 0.06), transparent 55%),
    linear-gradient(180deg, #f4efe6 0%, #ebe2d0 100%);
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'><g fill='none' stroke='%23b88a3f' stroke-opacity='0.06' stroke-width='0.8'><circle cx='80' cy='80' r='30'/><circle cx='80' cy='80' r='50'/><circle cx='80' cy='80' r='70'/></g></svg>");
  background-size: 240px 240px;
  z-index: 0;
}

.app { position: relative; z-index: 1; }

button, input, select, textarea { font: inherit; color: var(--ink); }

button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--ink);
  cursor: pointer;
  padding: 0 14px;
  transition: all 0.15s ease;
  box-shadow: var(--shadow-sm);
}

button:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(125, 60, 13, 0.12);
}

button:active { transform: translateY(0); }

button:disabled {
  cursor: wait;
  opacity: 0.5;
  transform: none;
}

input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--ink);
  outline: none;
  padding: 10px 12px;
  transition: border 0.2s, box-shadow 0.2s;
}

textarea {
  line-height: 1.85;
  font-family: var(--font-serif);
  font-size: 15px;
  resize: vertical;
}

/* 正文区域特殊字体 */
#draft, #chapterSummary, #chapterOutline, #seed, #premise, #projectBrief {
  font-family: var(--font-serif);
  font-size: 15.5px;
  line-height: 1.95;
  letter-spacing: 0.02em;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(125, 60, 13, 0.14);
}

/* ===== 布局 ===== */
.app {
  max-width: 1680px;
  margin: 0 auto;
  padding: 22px;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

h1, h2 { margin: 0; line-height: 1.2; }

h1 {
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
}

h2 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--accent-dark);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
}

.status {
  min-width: 200px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
  padding: 10px 14px;
  text-align: center;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.status.good { border-color: #8aac7a; background: #f0f5e8; color: #456134; }
.status.bad { border-color: #d08377; background: #f8e9e5; color: var(--danger); }

.command-band, .chapter-manager, .context-manager, .column, .footer {
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.command-band {
  display: grid;
  grid-template-columns: minmax(280px, 480px) minmax(420px, 1fr);
  gap: 16px;
  padding: 18px;
  margin-bottom: 20px;
}

.chapter-manager {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto auto;
  gap: 16px;
  align-items: center;
  padding: 14px 18px;
  margin-bottom: 20px;
}

.context-manager {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(300px, 520px) minmax(420px, 2fr);
  gap: 16px;
  align-items: stretch;
  padding: 18px;
  margin-bottom: 20px;
}

.context-manager p { margin: 6px 0 0; color: var(--muted); line-height: 1.6; }

.is-hidden { display: none !important; }

body[data-ui-mode="writing"] .command-band { grid-template-columns: minmax(260px, 400px) minmax(420px, 1fr); }
body[data-ui-mode="writing"] .action-groups { grid-template-columns: repeat(2, minmax(0, 1fr)); }
body[data-ui-mode="writing"] .workspace { grid-template-columns: minmax(0, 1fr); }
body[data-ui-mode="writing"] .workspace > .column:not(.is-hidden) { width: 100%; }
body[data-ui-mode="writing"] .field.tall textarea { min-height: 580px; }

body[data-ui-mode="archive"] .command-band { grid-template-columns: minmax(260px, 420px) minmax(620px, 1fr); }
body[data-ui-mode="archive"] .action-groups { grid-template-columns: repeat(3, minmax(0, 1fr)); }
body[data-ui-mode="archive"] .workspace { grid-template-columns: repeat(3, minmax(0, 1fr)); }

body[data-ui-mode="full"] .command-band { grid-template-columns: minmax(280px, 480px) minmax(420px, 1fr); }

.context-tools {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) auto;
  gap: 8px;
  align-content: start;
}

#contextPreview { min-height: 160px; resize: vertical; }

.chapter-manager p { margin: 6px 0 0; color: var(--muted); line-height: 1.6; }

.chapter-tools {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) repeat(6, auto);
  gap: 8px;
}

.chapter-stats {
  min-width: 200px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  text-align: right;
  font-style: italic;
}

#stopAutoWrite:not(:disabled) {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
  font-weight: 700;
}

#stopAutoWrite:not(:disabled):hover {
  background: #8a2820;
  border-color: #8a2820;
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  align-content: start;
}

.settings-grid label, .field {
  display: grid;
  gap: 7px;
  position: relative;
}

.settings-grid span, .field span {
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

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

.action-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  align-content: start;
  background: linear-gradient(180deg, var(--soft) 0%, var(--accent-soft) 100%);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
}

.actions strong {
  grid-column: 1 / -1;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-bottom: 6px;
  border-bottom: 1px dashed rgba(125, 60, 13, 0.2);
  margin-bottom: 4px;
}

.actions .primary { grid-column: 1 / -1; }

.primary {
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-dark) 100%);
  border-color: var(--accent-dark);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(125, 60, 13, 0.25);
}

.primary:hover {
  background: linear-gradient(180deg, var(--accent-dark) 0%, #3f1c04 100%);
  color: #fff;
  border-color: var(--accent-dark);
}

.workspace {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: start;
}

.column {
  display: grid;
  gap: 14px;
  padding: 18px;
}

.field.tall textarea { min-height: 460px; }

.version-panel { display: grid; gap: 7px; }
.version-panel > span { color: var(--muted); font-size: 13px; font-weight: 700; }

.version-tools {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 8px;
}

.footer {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  padding: 14px 18px;
}

#usage { color: var(--muted); font-size: 13px; margin-left: auto; font-style: italic; }

/* ===== 放大按钮（每个 textarea 右上角） ===== */
.field {
  position: relative;
}

.zoom-btn {
  position: absolute;
  top: 22px;
  right: 6px;
  min-height: 24px;
  height: 24px;
  padding: 0 8px;
  font-size: 11px;
  border-radius: 6px;
  background: rgba(125, 60, 13, 0.08);
  border: 1px solid transparent;
  color: var(--accent-dark);
  opacity: 0.5;
  transition: opacity 0.2s;
  z-index: 2;
  box-shadow: none;
}

.field:hover .zoom-btn { opacity: 1; }
.zoom-btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); transform: none; }

/* ===== 放大模态框（阅读模式） ===== */
.zoom-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26, 22, 18, 0.72);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  animation: fadeIn 0.2s ease;
}

.zoom-overlay.hidden { display: none; }

.zoom-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  width: 100%;
  max-width: 1100px;
  height: 100%;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  overflow: hidden;
  animation: slideUp 0.25s ease;
}

.zoom-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 22px;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, var(--panel-2) 0%, var(--panel) 100%);
}

.zoom-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-dark);
  margin: 0;
}

.zoom-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

.zoom-controls button {
  min-height: 32px;
  padding: 0 12px;
  font-size: 13px;
}

.zoom-font-size {
  color: var(--muted);
  font-size: 13px;
  min-width: 48px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.zoom-body {
  flex: 1;
  overflow: hidden;
  padding: 24px 32px;
  display: flex;
}

.zoom-textarea {
  flex: 1;
  width: 100%;
  height: 100%;
  border: none;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: var(--zoom-font-size, 19px);
  line-height: 2.0;
  letter-spacing: 0.03em;
  padding: 0;
  resize: none;
  outline: none;
}

.zoom-textarea:focus { box-shadow: none; }

.zoom-textarea[readonly] { cursor: default; }

.zoom-mode-read .zoom-body { justify-content: center; }
.zoom-mode-read .zoom-textarea {
  max-width: 780px;
  text-indent: 2em;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

/* 响应式 */
@media (max-width: 1200px) {
  .command-band { grid-template-columns: 1fr; }
  .chapter-manager { grid-template-columns: 1fr; }
  .context-manager { grid-template-columns: 1fr; }
  .chapter-tools { grid-template-columns: 1fr 1fr; }
  .workspace { grid-template-columns: 1fr; }
  .zoom-body { padding: 16px; }
}

@media (max-width: 760px) {
  .app { padding: 12px; }
  .topbar, .footer { align-items: stretch; flex-direction: column; }
  .settings-grid, .action-groups, .chapter-tools, .context-tools, .version-tools {
    grid-template-columns: 1fr;
  }
  .chapter-stats { text-align: left; }
  h1 { font-size: 26px; }
  .zoom-panel { max-height: 100vh; border-radius: 0; }
}