/* ============================================
   Amaker AI 工坊 — MUJI 风格样式系统
   参考 exchange/style_guide/ 的设计规范
   ============================================ */

:root {
  /* === 色彩系统 === */
  --muji-bg:        #FAF8F5;
  --muji-bg-sub:    #F5F0EB;
  --muji-text:      #2C2C2C;
  --muji-text-sub:  #5A5A5A;
  --muji-green:     #6B8E6B;
  --muji-brown:     #8B7355;
  --muji-border:    #E0DBD5;
  --muji-shadow:    rgba(0,0,0,0.06);
  --muji-hover:     rgba(0,0,0,0.04);

  /* === 间距 === */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* === 圆角 === */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  /* === 卡片尺寸 === */
  --card-max-width: 340px;
  --card-min-width: 300px;

  /* === 阴影 === */
  --shadow-card: 0 2px 12px var(--muji-shadow);
  --shadow-card-hover: 0 4px 20px rgba(0,0,0,0.10);
  --shadow-modal: 0 8px 40px rgba(0,0,0,0.15);
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--muji-bg);
  color: var(--muji-text);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* === 标签胶囊 === */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  background: var(--muji-bg-sub);
  border: 1px solid var(--muji-border);
  border-radius: 20px;
  font-size: 12px;
  color: var(--muji-text-sub);
  cursor: pointer;
  transition: all 0.2s;
}
.tag:hover, .tag.active {
  background: var(--muji-green);
  border-color: var(--muji-green);
  color: white;
}

/* === 按钮 === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}
.btn-primary {
  background: var(--muji-green);
  color: white;
}
.btn-primary:hover { filter: brightness(0.9); transform: translateY(-1px); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--muji-border);
  color: var(--muji-text);
}
.btn-outline:hover { border-color: var(--muji-green); color: var(--muji-green); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

/* === 项目卡片网格 === */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--card-min-width), 1fr));
  gap: var(--space-lg);
  padding: var(--space-lg);
  max-width: 960px;
  margin: 0 auto;
}

/* === 项目预览卡片 === */
.project-card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.25s;
}
.project-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}
.project-card__img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  background: var(--muji-bg-sub);
}
.project-card__body {
  padding: var(--space-md);
}
.project-card__name {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--muji-text);
}
.project-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muji-text-sub);
}
.project-card__price {
  font-size: 16px;
  font-weight: 700;
  color: var(--muji-green);
}
.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

/* === 标签筛选栏 === */
.filter-bar {
  max-width: 960px;
  margin: var(--space-xl) auto 0;
  padding: 0 var(--space-lg);
}
.filter-bar__title {
  font-size: 13px;
  color: var(--muji-text-sub);
  margin-bottom: var(--space-sm);
}
.filter-bar__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* === 弹窗 === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}
.modal {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  width: 90%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--space-xl);
  position: relative;
}
.modal__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--muji-bg-sub);
  border: none;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  color: var(--muji-text-sub);
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal__close:hover { background: var(--muji-border); }

/* === 创作卡 === */
.creation-card {
  max-width: 560px;
}
.creation-card__ref-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: var(--muji-bg-sub);
  margin-bottom: var(--space-md);
}
.creation-card__prompt {
  width: 100%;
  padding: var(--space-md);
  border: 1px solid var(--muji-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  resize: none;
  min-height: 80px;
  font-family: inherit;
  color: var(--muji-text);
  background: var(--muji-bg);
}
.creation-card__prompt:focus {
  outline: none;
  border-color: var(--muji-green);
}
.creation-card__result {
  margin-top: var(--space-md);
}
.creation-card__result img {
  width: 100%;
  border-radius: var(--radius-md);
}
.creation-card__counter {
  text-align: center;
  font-size: 13px;
  color: var(--muji-text-sub);
  margin: var(--space-sm) 0;
}

/* === PDF 预览卡 === */
.pdf-preview {
  max-width: 520px;
}
.pdf-preview__preview {
  background: var(--muji-bg-sub);
  border: 1px dashed var(--muji-border);
  border-radius: var(--radius-md);
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--muji-text-sub);
  margin-bottom: var(--space-lg);
}
.pdf-preview__params {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}
.pdf-preview__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}
.pdf-preview__field label {
  font-size: 12px;
  color: var(--muji-text-sub);
}
.pdf-preview__field input, .pdf-preview__field select {
  padding: 8px 12px;
  border: 1px solid var(--muji-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--muji-text);
  background: var(--muji-bg);
}
.pdf-preview__field input:focus, .pdf-preview__field select:focus {
  outline: none;
  border-color: var(--muji-green);
}

/* === Header === */
.header {
  background: white;
  border-bottom: 1px solid var(--muji-border);
  padding: 0 var(--space-xl);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header__logo {
  font-size: 17px;
  font-weight: 700;
  color: var(--muji-text);
  text-decoration: none;
}
.header__logo span { color: var(--muji-green); }

/* === Loading === */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl);
  color: var(--muji-text-sub);
  gap: var(--space-sm);
}
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--muji-border);
  border-top-color: var(--muji-green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* === Toast === */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--muji-text);
  color: white;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  opacity: 0;
  transition: all 0.3s;
  z-index: 2000;
  white-space: nowrap;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* === Responsive === */
@media (max-width: 600px) {
  .projects-grid { grid-template-columns: 1fr; padding: var(--space-md); }
  .modal { width: 95%; padding: var(--space-lg); }
}