/* ============================================================
   拼豆图纸生成器 - 主样式
   风格: pindoule.cn 暖色调
   ============================================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --pd-bg-start: #FFF1F7;
  --pd-bg-end: #FFF3E3;
  --pd-card-bg: rgba(255,255,255,0.86);
  --pd-gold: #FFD35C;
  --pd-gold-hover: #f0c040;
  --pd-ink: #351326;
  --pd-ink-light: rgba(53,19,38,0.55);
  --pd-border: rgba(53,19,38,0.12);
  --pd-shadow: rgba(53,19,38,0.08);
  --pd-shadow-btn: rgba(53,19,38,0.18);
  --pd-pink: #EC2F98;
  --pd-bead-gold: #ffc64a;
  --pd-radius: 20px;
  --pd-radius-sm: 12px;
  --pd-font: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Helvetica Neue', sans-serif;
}

body {
  font-family: var(--pd-font);
  background: linear-gradient(180deg, var(--pd-bg-start) 0%, var(--pd-bg-end) 100%);
  color: var(--pd-ink);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* 导航 */
.navbar {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--pd-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo { font-size: 20px; font-weight: 800; letter-spacing: -0.3px; }
.nav-right { display: flex; align-items: center; gap: 8px; }
.nav-badge {
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--pd-pink);
  padding: 2px 10px;
  border-radius: 20px;
  letter-spacing: 1px;
}

/* 主内容 */
.main-content {
  max-width: 700px;
  margin: 0 auto;
  padding: 16px;
}

.section-card {
  background: var(--pd-card-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--pd-radius);
  box-shadow: 0 2px 16px var(--pd-shadow);
  padding: 24px;
  margin-bottom: 16px;
  border: 1px solid var(--pd-border);
}

/* 上传区域 */
.upload-card { padding-bottom: 20px; }
.upload-zone {
  text-align: center;
  padding: 28px 16px;
  border: 2px dashed var(--pd-border);
  border-radius: var(--pd-radius-sm);
  cursor: pointer;
  transition: all 0.25s ease;
  margin-bottom: 16px;
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--pd-gold);
  background: rgba(255,211,92,0.06);
}
.upload-icon { font-size: 48px; margin-bottom: 8px; }
.upload-zone h2 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 4px;
}
.upload-hint {
  font-size: 13px;
  color: var(--pd-ink-light);
  margin-bottom: 16px;
  line-height: 1.4;
}

.upload-preview {
  margin: 12px auto 16px;
  max-width: 200px;
  border-radius: var(--pd-radius-sm);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.upload-preview img { width: 100%; display: block; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 28px;
  border: none;
  border-radius: 999px;
  background: var(--pd-gold);
  color: var(--pd-ink);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 2px 8px var(--pd-shadow-btn);
}
.btn-primary:hover { background: var(--pd-gold-hover); transform: translateY(-1px); }
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}
.btn-large {
  padding: 14px 40px;
  font-size: 17px;
  width: 100%;
  justify-content: center;
}

/* 参数设置 */
.params-card {
  background: rgba(255,245,237,0.4);
  border-radius: var(--pd-radius-sm);
  padding: 16px;
  margin-bottom: 12px;
}
.params-row {
  display: flex;
  gap: 12px;
  margin-bottom: 10px;
}
.params-row:last-child { margin-bottom: 0; }
.params-inline {
  justify-content: center;
  gap: 20px;
}
.param-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.param-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--pd-ink-light);
}
.param-select {
  padding: 8px 12px;
  border: 1px solid var(--pd-border);
  border-radius: 10px;
  background: white;
  font-size: 13px;
  color: var(--pd-ink);
  font-weight: 500;
  cursor: pointer;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23351326' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
}
.param-select:focus { border-color: var(--pd-gold); }

.param-control {
  display: flex;
  align-items: center;
  gap: 8px;
}
.param-btn {
  width: 34px;
  height: 34px;
  border: 1px solid var(--pd-border);
  border-radius: 10px;
  background: white;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--pd-ink);
  transition: all 0.15s;
  user-select: none;
}
.param-btn:hover { background: var(--pd-bg-start); border-color: var(--pd-gold); }
.param-btn:active { transform: scale(0.95); }
.param-value {
  font-size: 22px;
  font-weight: 800;
  min-width: 40px;
  text-align: center;
}
.param-value-sm { font-size: 16px; min-width: 30px; }

.upload-action {
  padding: 0 4px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--pd-ink-light);
  cursor: pointer;
  font-weight: 500;
}
.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--pd-gold-hover);
  cursor: pointer;
}

/* 加载 */
.loading-content { text-align: center; padding: 30px 0; }
.spinner {
  width: 52px;
  height: 52px;
  border: 4px solid var(--pd-border);
  border-top-color: var(--pd-gold-hover);
  border-radius: 50%;
  animation: spin 0.8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  margin: 0 auto 20px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-content > p { font-size: 17px; font-weight: 700; margin-bottom: 20px; }
.loading-steps {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}
.step {
  font-size: 14px;
  color: var(--pd-ink-light);
  padding: 6px 18px;
  border-radius: 20px;
  background: rgba(53,19,38,0.04);
  transition: all 0.4s;
}
.step.active {
  background: var(--pd-gold);
  color: var(--pd-ink);
  font-weight: 700;
  transform: scale(1.05);
}
.step.done {
  background: #d4edda;
  color: #155724;
}

/* 结果 */
.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}
.result-header h2 { font-size: 18px; }
.result-meta {
  font-size: 13px;
  color: var(--pd-ink-light);
  background: rgba(53,19,38,0.06);
  padding: 5px 14px;
  border-radius: 20px;
  font-weight: 500;
}

.bead-preview-container {
  text-align: center;
  margin-bottom: 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: #fafafa;
  border-radius: var(--pd-radius-sm);
  padding: 8px;
  border: 1px solid var(--pd-border);
}
#beadCanvas {
  max-width: 100%;
  height: auto;
  image-rendering: pixelated;
  border-radius: 8px;
}

.action-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 20px;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  border: 1px solid var(--pd-border);
  border-radius: 999px;
  background: white;
  color: var(--pd-ink);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-secondary:hover {
  background: var(--pd-card-bg);
  border-color: var(--pd-gold);
  transform: translateY(-1px);
}

/* 颜色统计 */
.color-stats { margin-top: 4px; }
.color-stats h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.color-summary {
  font-size: 12px;
  font-weight: 500;
  color: var(--pd-ink-light);
}
.color-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
}
.color-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 12px;
  background: rgba(53,19,38,0.04);
  font-size: 12px;
  border: 1px solid var(--pd-border);
}
.color-dot {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 1px solid rgba(0,0,0,0.08);
  flex-shrink: 0;
}
.color-code {
  font-weight: 700;
  color: var(--pd-ink);
  min-width: 28px;
}
.color-count {
  color: var(--pd-ink-light);
  margin-left: auto;
  font-weight: 500;
}
.color-percent {
  color: var(--pd-ink-light);
  font-size: 11px;
}

/* 底部 */
.footer {
  text-align: center;
  padding: 20px;
  font-size: 12px;
  color: var(--pd-ink-light);
  opacity: 0.7;
}

/* 响应式 */
@media (min-width: 768px) {
  .main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    max-width: 1000px;
  }
  .upload-card { grid-column: 1; }
  #loadingSection { grid-column: 1; }
  #resultSection { grid-column: 2; grid-row: 1 / 3; }
  .footer { grid-column: 1 / -1; }
}

@media (max-width: 480px) {
  .section-card { padding: 16px; border-radius: 16px; }
  .upload-zone { padding: 20px 12px; }
  .upload-icon { font-size: 36px; }
  .upload-zone h2 { font-size: 18px; }
  .params-card { padding: 12px; }
  .params-row { gap: 8px; flex-wrap: wrap; }
  .param-group { min-width: calc(50% - 8px); }
  .btn-large { padding: 12px 24px; font-size: 15px; }
  .color-list { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
}

/* 小工具 */
.hidden { display: none !important; }