/* ========== 变量 ========== */
:root {
  --ink: #1f1a17;
  --ink-soft: #6b5e57;
  --ink-faint: #b8aca5;
  --line: #d8cec6;
  --line-soft: #ece4dd;
  --bg: #faf6f1;
  --bg-warm: #fbf8f5;
  --accent: #c47a87;
  --accent-soft: #e8c4cc;
  --warn: #c47a47;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== 重置 ========== */
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: 'Inter', -apple-system, 'PingFang SC', 'Helvetica Neue', sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; cursor: pointer; }
input { font-family: inherit; }

/* ========== 布局 ========== */
.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 32px 32px;
  display: flex;
  flex-direction: column;
  gap: 40px;
  min-height: 100vh;
}

.app__header {
  text-align: center;
}
.app__title {
  font-family: 'Noto Serif SC', serif;
  font-size: 32px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--ink);
}
.app__subtitle {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: 0.05em;
}

.app__body {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: start;
}

/* ========== 步骤 ========== */
.step {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.step__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}
.step__num {
  font-family: 'Noto Serif SC', serif;
  font-size: 14px;
  color: var(--accent);
  letter-spacing: 0.1em;
}
.step__title {
  font-family: 'Noto Serif SC', serif;
  font-size: 18px;
  color: var(--ink);
  font-weight: 500;
}
.step__hint {
  margin-left: auto;
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ========== 款式 Gallery ========== */
.gallery {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 12px;
}
.style-card {
  position: relative;
  aspect-ratio: 1;
  background: var(--bg-warm);
  border: 1.5px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  overflow: hidden;
  transition: all 0.2s var(--ease);
  display: flex;
  flex-direction: column;
}
.style-card:hover {
  border-color: var(--line);
  transform: translateY(-1px);
}
.style-card.is-selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.style-card__swatch {
  flex: 1;
  background: var(--swatch-color, #f5e9dc);
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}
.style-card__swatch::after {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 40%;
  height: 18%;
  background: rgba(255, 255, 255, 0.45);
  border-radius: 50%;
  filter: blur(2px);
}
.style-card__name {
  padding: 6px 8px;
  font-size: 11px;
  color: var(--ink-soft);
  text-align: center;
  background: white;
  letter-spacing: 0.02em;
}
.style-card__num {
  position: absolute;
  top: 4px;
  left: 6px;
  font-size: 10px;
  color: rgba(0,0,0,0.4);
  font-weight: 500;
  z-index: 1;
}

.recommend-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 4px;
}
.btn-recommend {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  padding: 6px 16px;
  font-size: 12px;
  border-radius: 100px;
  letter-spacing: 0.05em;
  transition: all 0.2s var(--ease);
}
.btn-recommend:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-recommend:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.recommend-reason {
  font-size: 12px;
  color: var(--ink-soft);
  font-style: italic;
}

/* ========== AI 分析 ========== */
.ai-analysis {
  background: var(--bg-warm);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 4px;
  position: relative;
  animation: fadeIn 0.3s var(--ease);
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}
.ai-analysis__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.ai-analysis__title {
  font-family: 'Noto Serif SC', serif;
  font-size: 13px;
  color: var(--ink);
  letter-spacing: 0.1em;
}
.ai-analysis__close {
  background: transparent;
  border: none;
  color: var(--ink-faint);
  font-size: 20px;
  cursor: pointer;
  padding: 0 8px;
  line-height: 1;
}
.ai-analysis__close:hover { color: var(--ink); }

.ai-analysis__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.ai-tag {
  display: inline-flex;
  align-items: center;
  background: white;
  border: 1px solid var(--line-soft);
  border-radius: 100px;
  padding: 4px 12px 4px 4px;
  font-size: 12px;
  overflow: hidden;
}
.ai-tag__label {
  background: var(--ink);
  color: var(--bg);
  padding: 2px 10px;
  border-radius: 100px;
  margin-right: 8px;
  font-size: 10px;
  letter-spacing: 0.1em;
}
.ai-tag__value {
  color: var(--ink);
  font-size: 12px;
}

.ai-recommend__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.ai-rec-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: white;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.ai-rec-item:hover {
  border-color: var(--accent);
  background: #fef9fb;
}
.ai-rec-item__swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.06);
}
.ai-rec-item__num {
  font-family: 'Noto Serif SC', serif;
  font-size: 14px;
  color: var(--accent);
  font-weight: 500;
  min-width: 28px;
}
.ai-rec-item__main {
  flex: 1;
  min-width: 0;
}
.ai-rec-item__name {
  font-size: 13px;
  color: var(--ink);
  margin-bottom: 2px;
}
.ai-rec-item__reason {
  font-size: 11px;
  color: var(--ink-soft);
  line-height: 1.4;
}
.ai-rec-item__pick {
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.1em;
  white-space: nowrap;
}

/* ========== 上传 ========== */
.dropzone {
  position: relative;
  min-height: 200px;
  background: var(--bg-warm);
  border: 1.5px dashed var(--line);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.dropzone:hover {
  border-color: var(--ink-faint);
  background: #fdfbf9;
}
.dropzone.is-dragover {
  border-color: var(--accent);
  background: #fef6f8;
}
.dropzone.has-image {
  border-style: solid;
  border-color: var(--line-soft);
  min-height: auto;
  cursor: default;
}
.dropzone__inner {
  text-align: center;
  color: var(--ink-soft);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px;
}
.dropzone.has-image .dropzone__inner {
  display: none;
}
.dropzone__icon {
  color: var(--ink-faint);
}
.dropzone__text {
  font-size: 14px;
  letter-spacing: 0.05em;
}
.dropzone__sub {
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
}
.dropzone__preview {
  display: none;
  max-width: 100%;
  max-height: 400px;
  object-fit: contain;
}
.dropzone.has-image .dropzone__preview {
  display: block;
}

/* ========== 试戴按钮 ========== */
.step--action {
  flex-direction: row;
  align-items: center;
  gap: 16px;
}
.btn-tryon {
  flex: 1;
  background: var(--ink);
  color: var(--bg);
  border: none;
  padding: 18px 32px;
  border-radius: var(--radius-md);
  font-size: 14px;
  letter-spacing: 0.15em;
  transition: all 0.2s var(--ease);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.btn-tryon:hover:not(:disabled) {
  background: #2c2620;
}
.btn-tryon:disabled {
  background: var(--line);
  color: var(--ink-faint);
  cursor: not-allowed;
}
.btn-tryon__label {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.2em;
}
.btn-tryon__sub {
  font-size: 11px;
  letter-spacing: 0.1em;
  opacity: 0.7;
}
.btn-white-preview,
.btn-reset {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  padding: 14px 20px;
  font-size: 12px;
  border-radius: var(--radius-md);
  letter-spacing: 0.1em;
  transition: all 0.2s var(--ease);
}
.btn-white-preview:hover:not(:disabled),
.btn-reset:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.btn-white-preview:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.tuning-panel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: -20px;
  margin-bottom: 28px;
  padding: 14px 16px;
  background: var(--bg-warm);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
}
.tuning-control {
  display: grid;
  gap: 8px;
  min-width: 0;
}
.tuning-control span {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 11px;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
}
.tuning-control b {
  color: var(--accent);
  font-weight: 500;
  white-space: nowrap;
}
.tuning-control input {
  width: 100%;
  accent-color: var(--accent);
}

/* ========== 结果 ========== */
.step--result {
  border-top: 1px solid var(--line-soft);
  padding-top: 32px;
}
.result__grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: center;
}
.result__pane {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.result__pane-label {
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.result__img {
  width: 100%;
  max-height: 480px;
  object-fit: contain;
  background: var(--bg-warm);
  border-radius: var(--radius-md);
  border: 1px solid var(--line-soft);
}
.result__divider {
  color: var(--ink-faint);
  font-size: 18px;
  align-self: center;
  margin-top: 24px;
}
.result__meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.result__pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: var(--bg-warm);
  border: 1px solid var(--line-soft);
  border-radius: 100px;
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.05em;
}
.result__pill--accent {
  background: var(--accent-soft);
  border-color: transparent;
  color: var(--ink);
}

.style-advice {
  background: var(--bg-warm);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: grid;
  gap: 6px;
}
.style-advice__score {
  font-family: 'Noto Serif SC', serif;
  font-size: 14px;
  color: var(--ink);
  letter-spacing: 0.08em;
}
.style-advice__text {
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* ========== 加载 ========== */
.loader {
  display: flex;
  justify-content: center;
  padding: 24px 0;
}
.loader__steps {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}
.loader__step {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: 0.05em;
}
.loader__step.is-active {
  color: var(--ink);
}
.loader__step.is-done {
  color: var(--ink-soft);
}
.loader__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-faint);
  flex-shrink: 0;
  transition: background 0.3s var(--ease);
}
.loader__step.is-active .loader__dot {
  background: var(--accent);
  animation: dotPulse 1.2s ease-in-out infinite;
}
.loader__step.is-done .loader__dot {
  background: var(--ink);
}
@keyframes dotPulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(196, 122, 135, 0.4); }
  50% { transform: scale(1.2); box-shadow: 0 0 0 6px rgba(196, 122, 135, 0); }
}

/* ========== Chatbot ========== */
.chatbot {
  position: sticky;
  top: 32px;
  background: white;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  height: calc(100vh - 100px);
  max-height: 700px;
  overflow: hidden;
}
.chatbot__head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line-soft);
}
.chatbot__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.chatbot__title {
  font-family: 'Noto Serif SC', serif;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--ink);
}
.chatbot__messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.msg {
  display: flex;
}
.msg--user { justify-content: flex-end; }
.msg--bot { justify-content: flex-start; }
.msg__bubble {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.6;
  word-break: break-word;
}
.msg--user .msg__bubble {
  background: var(--ink);
  color: var(--bg);
}
.msg--bot .msg__bubble {
  background: var(--bg-warm);
  color: var(--ink);
}
.chatbot__input {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--line-soft);
}
#chatInput {
  flex: 1;
  border: none;
  outline: none;
  font-size: 13px;
  padding: 8px 12px;
  background: var(--bg-warm);
  border-radius: var(--radius-md);
  color: var(--ink);
}
#chatInput::placeholder {
  color: var(--ink-faint);
}
.chatbot__send {
  background: var(--ink);
  color: var(--bg);
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s var(--ease);
}
.chatbot__send:disabled {
  background: var(--line);
  cursor: not-allowed;
}
.chatbot__send:not(:disabled):hover {
  background: #2c2620;
}

/* ========== 页脚 ========== */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.2em;
  padding: 24px 0 8px;
  border-top: 1px solid var(--line-soft);
  margin-top: auto;
  text-transform: uppercase;
}
.footer__save {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  padding: 6px 16px;
  font-size: 11px;
  letter-spacing: 0.15em;
  border-radius: 100px;
  cursor: pointer;
  font-family: inherit;
  text-transform: uppercase;
  transition: all 0.2s var(--ease);
}
.footer__save:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ========== 响应式 ========== */
@media (max-width: 900px) {
  .app__body { grid-template-columns: 1fr; }
  .chatbot { position: relative; top: 0; height: 500px; }
  .gallery { grid-template-columns: repeat(5, 1fr); }
  .tuning-panel { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .app { padding: 32px 20px 20px; gap: 24px; }
  .app__title { font-size: 28px; }
  .gallery { grid-template-columns: repeat(4, 1fr); }
  .result__grid { grid-template-columns: 1fr; }
  .result__divider { display: none; }
  .tuning-panel { grid-template-columns: 1fr; }
}