/* ============================================================
   拼豆底稿生成器 —— 视觉方向：纸质图纸 + 色卡参考卡片
   配色: 暖纸白底 + 墨棕字 + 珊瑚红主操作色 + 青蓝辅助色
   字体: 等宽字体处理色号/数据（呼应网格坐标的本质），
        衬线体做标题（参考色卡说明书的排版感）
   ============================================================ */

:root {
  --paper: #f6f1e7;
  --paper-deep: #efe8d8;
  --ink: #2b2520;
  --ink-soft: #6b6256;
  --line: #d9d2c3;
  --accent: #d6573f;
  --accent-deep: #b8442d;
  --teal: #3b7a8c;
  --white: #fffdf9;

  --font-display: "Iowan Old Style", "Palatino Linotype", Georgia, "Noto Serif SC", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", "JetBrains Mono", Consolas, "Noto Sans Mono CJK SC", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

/* 全局极淡网格纹理，呼应"图纸"主题 */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.35;
}

.topbar {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 28px 36px 20px;
  border-bottom: 1px solid var(--line);
}

.topbar-mark {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--white);
  background: var(--accent);
  border-radius: 9px;
  flex-shrink: 0;
}

.topbar-text h1 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 2px;
  letter-spacing: 0.2px;
}

.topbar-text p {
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  letter-spacing: 0.2px;
}

.layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 24px;
  padding: 24px 36px 60px;
  align-items: start;
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
}

/* ---- 左侧面板 ---- */

.panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 18px;
}

.card-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--accent-deep);
  margin-bottom: 12px;
  font-weight: 600;
}

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 140px;
  border: 1.5px dashed var(--line);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
  overflow: hidden;
  position: relative;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: #fdf6f1;
}

.dropzone-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 13px;
}

.dropzone-icon {
  font-size: 22px;
  color: var(--accent);
  font-weight: 300;
}

.preview-img {
  width: 100%;
  max-height: 220px;
  object-fit: contain;
  display: block;
}

.field-row {
  display: flex;
  gap: 10px;
}

.field {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12px;
  color: var(--ink-soft);
}

.field.inline {
  flex: none;
  flex-direction: row;
  align-items: center;
  gap: 6px;
}

.field-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.field-block:last-child { margin-bottom: 0; }

.field-note {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1.45;
}

input[type="number"], input[type="text"], select {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 9px;
  width: 100%;
}

input[type="number"]:focus, input[type="text"]:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

.preset-row {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.preset-btn {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 7px 0;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink-soft);
  border-radius: 6px;
  cursor: pointer;
}

.preset-btn:hover { border-color: var(--teal); color: var(--teal); }
.preset-btn.active { border-color: var(--teal); color: var(--teal); background: #eef6f7; }

.checkbox-field {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink);
  cursor: pointer;
  margin-bottom: 10px;
}

.checkbox-field.inline { margin-bottom: 0; }
.checkbox-field:last-child { margin-bottom: 0; }

.checkbox-field input { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; }

.val-tag {
  font-family: var(--font-mono);
  color: var(--accent-deep);
  font-weight: 600;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.sub-options {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.convert-btn {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--white);
  background: var(--accent);
  border: none;
  border-radius: 8px;
  padding: 14px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.convert-btn:hover:not(:disabled) { background: var(--accent-deep); }
.convert-btn:disabled { background: var(--line); color: var(--ink-soft); cursor: not-allowed; }

.status-line {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  text-align: center;
  min-height: 16px;
}

.status-line.error { color: var(--accent-deep); }

/* ---- 右侧结果区 ---- */

.result {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.result-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 12px;
  font-size: 12px;
  color: var(--ink-soft);
}

.download-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--teal);
  background: var(--white);
  border: 1px solid var(--teal);
  border-radius: 6px;
  padding: 7px 12px;
  cursor: pointer;
  white-space: nowrap;
}

.download-btn:hover { background: #eef6f7; }

.canvas-wrap {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow: auto;
}

.canvas-placeholder {
  color: var(--ink-soft);
  font-size: 13px;
  text-align: center;
  max-width: 320px;
  line-height: 1.6;
}

#resultCanvas {
  max-width: 100%;
  image-rendering: pixelated;
}

.stats {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 18px;
}

.stats-summary {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

.stats-summary b { color: var(--accent-deep); }

.stats-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bead-stat-group {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  align-items: start;
  padding-bottom: 11px;
  border-bottom: 1px dashed var(--line);
}

.bead-stat-group:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.bead-stat-group-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  min-height: 24px;
  border-radius: 6px;
  background: var(--paper-deep);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.bead-stat-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  align-items: flex-start;
}

.bead-stat-item {
  width: 42px;
  text-align: center;
  font-family: var(--font-mono);
}

.bead-stat-swatch {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin: 0 auto 4px;
  border: 1px solid rgba(31, 27, 22, 0.16);
  border-radius: 6px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22), 0 1px 2px rgba(31, 27, 22, 0.12);
  font-size: 12px;
  font-weight: 700;
}

.bead-stat-count {
  color: var(--ink);
  font-size: 12px;
  line-height: 1.2;
}