/* Ex-AI (前任AI) — WeChat-inspired design system */

:root {
  --green: #07C160;
  --green-light: #95EC69;
  --green-dark: #06AD56;
  --bg: #EDEDED;
  --bg-white: #FFFFFF;
  --text: #111111;
  --text-muted: #999999;
  --text-secondary: #576B95;
  --bubble-self: #95EC69;
  --bubble-other: #FFFFFF;
  --shadow: rgba(0, 0, 0, 0.08);
  --radius: 12px;
  --font: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Courier New", monospace;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- Layout ---- */
.container {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 16px;
}

section {
  padding: 32px 0;
}

.hidden { display: none !important; }

/* ---- Hero ---- */
.hero {
  text-align: center;
  padding: 60px 0 40px;
  background: linear-gradient(135deg, var(--green) 0%, #04a553 100%);
  color: white;
}

.hero h1 {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 8px;
}

.hero .subtitle {
  font-size: 18px;
  opacity: 0.95;
  margin-bottom: 4px;
}

.hero .tagline {
  font-size: 14px;
  opacity: 0.7;
  font-style: italic;
  margin-bottom: 20px;
}

.hero .privacy-badge {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  margin-bottom: 28px;
}

.hero-buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font);
  min-height: 44px;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: white;
  color: var(--green);
}
.btn-primary:hover { background: #f0f0f0; }

.btn-secondary {
  background: rgba(255,255,255,0.2);
  color: white;
  border: 1px solid rgba(255,255,255,0.4);
}
.btn-secondary:hover { background: rgba(255,255,255,0.3); }

.btn-green {
  background: var(--green);
  color: white;
}
.btn-green:hover { background: var(--green-dark); }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid #ddd;
}

.btn-large {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  border-radius: var(--radius);
}

.btn-copy {
  background: var(--green);
  color: white;
  width: 100%;
  padding: 14px;
  font-size: 16px;
  border-radius: var(--radius);
  position: relative;
}
.btn-copy.copied {
  background: #333;
}

/* ---- Tabs ---- */
.tabs {
  display: flex;
  border-bottom: 2px solid #e0e0e0;
  margin-bottom: 16px;
}

.tab {
  flex: 1;
  padding: 12px;
  text-align: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: var(--font);
}
.tab.active {
  color: var(--green);
  border-bottom-color: var(--green);
}

/* ---- Input Section ---- */
.input-section {
  background: white;
  padding: 20px 16px;
}

.text-input {
  width: 100%;
  min-height: 200px;
  padding: 16px;
  border: 1px solid #e0e0e0;
  border-radius: var(--radius);
  font-size: 14px;
  font-family: var(--font);
  line-height: 1.6;
  resize: vertical;
  color: var(--text);
}
.text-input:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(7, 193, 96, 0.1);
}
.text-input::placeholder { color: #ccc; }

.analyze-btn-wrap {
  margin-top: 16px;
}

/* ---- Screenshot Upload ---- */
.upload-zone {
  border: 2px dashed #d0d0d0;
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--green);
  background: rgba(7, 193, 96, 0.03);
}
.upload-zone p { margin-top: 8px; font-size: 14px; }
.upload-icon { font-size: 40px; }

/* OCR Previews */
.ocr-previews {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.ocr-thumb {
  width: 60px;
  height: 60px;
  border-radius: 8px;
  object-fit: cover;
  border: 2px solid #e0e0e0;
}
.ocr-thumb.processing { border-color: var(--green); opacity: 0.6; }
.ocr-thumb.done { border-color: var(--green); opacity: 1; }

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 6px;
  background: #e8e8e8;
  border-radius: 3px;
  margin: 16px 0 8px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--green);
  border-radius: 3px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}

/* ---- Speaker Selection ---- */
.speaker-section {
  background: white;
  padding: 24px 16px;
  text-align: center;
}

.speaker-section h2 {
  font-size: 18px;
  margin-bottom: 8px;
}

.speaker-section p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 20px;
}

.speaker-cards {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.speaker-card {
  padding: 14px 28px;
  border-radius: var(--radius);
  border: 2px solid #e0e0e0;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  background: white;
  font-family: var(--font);
  min-height: 44px;
}
.speaker-card:hover { border-color: var(--green); }
.speaker-card.selected {
  border-color: var(--green);
  background: rgba(7, 193, 96, 0.08);
  color: var(--green);
}

/* ---- Demo Banner ---- */
.demo-banner {
  background: #FFF3CD;
  color: #856404;
  padding: 10px 16px;
  text-align: center;
  font-size: 13px;
  font-weight: 500;
}

/* ---- Analysis Dashboard ---- */
.analysis-section {
  background: white;
  padding: 24px 16px;
}

.analysis-header {
  text-align: center;
  margin-bottom: 24px;
}

.analysis-header h2 {
  font-size: 22px;
  margin-bottom: 4px;
}

.analysis-meta {
  color: var(--text-muted);
  font-size: 13px;
}

/* Score Gauges */
.scores-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.score-item {
  text-align: center;
}

.score-gauge {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 8px;
  position: relative;
  font-size: 22px;
  font-weight: 700;
  color: var(--green);
}

.score-gauge::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(
    var(--green) calc(var(--score) * 1%),
    #e8e8e8 calc(var(--score) * 1%)
  );
  mask: radial-gradient(farthest-side, transparent calc(100% - 6px), #000 calc(100% - 6px));
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 6px), #000 calc(100% - 6px));
}

.score-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.score-tag {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

/* For the bottom row of 2 scores, center them */
.scores-grid .score-item:nth-child(4) {
  grid-column: 1 / 2;
  justify-self: end;
  padding-right: 16px;
}
.scores-grid .score-item:nth-child(5) {
  grid-column: 2 / 4;
  justify-self: start;
  padding-left: 16px;
}

/* Radar Chart */
.radar-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 28px;
}

.radar-chart {
  width: 220px;
  height: 220px;
}

/* Detail Sections */
.detail-section {
  border-top: 1px solid #f0f0f0;
  padding: 16px 0;
}

.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  padding: 4px 0;
}

.detail-header h3 {
  font-size: 15px;
  font-weight: 600;
}

.detail-toggle {
  color: var(--text-muted);
  font-size: 18px;
  transition: transform 0.2s;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
}
.detail-toggle.open { transform: rotate(180deg); }

.detail-content {
  padding-top: 12px;
  display: none;
}
.detail-content.open { display: block; }

.detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  font-size: 14px;
}

.detail-row .label { color: var(--text-muted); }
.detail-row .value { font-weight: 500; }

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.tag {
  background: rgba(7, 193, 96, 0.08);
  color: var(--green-dark);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 13px;
}

/* Chat Bubbles Preview */
.chat-preview {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 16px;
  margin: 16px 0;
}

.chat-bubble {
  max-width: 75%;
  padding: 10px 14px;
  border-radius: 12px;
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.5;
  word-break: break-word;
}

.chat-bubble.ex {
  background: var(--bubble-other);
  border-top-left-radius: 4px;
  margin-right: auto;
  box-shadow: 0 1px 2px var(--shadow);
}

/* ---- Prompt Section ---- */
.prompt-section {
  background: white;
  padding: 24px 16px;
  border-top: 8px solid var(--bg);
}

.prompt-section h2 {
  font-size: 18px;
  margin-bottom: 16px;
  text-align: center;
}

.prompt-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.prompt-tab {
  padding: 6px 16px;
  border-radius: 16px;
  font-size: 13px;
  cursor: pointer;
  border: 1px solid #e0e0e0;
  background: white;
  font-family: var(--font);
  transition: all 0.2s;
}
.prompt-tab.active {
  background: var(--green);
  color: white;
  border-color: var(--green);
}

.prompt-card {
  background: #1e1e1e;
  color: #d4d4d4;
  border-radius: var(--radius);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  max-height: 400px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
  margin-bottom: 16px;
}

.prompt-card h2, .prompt-card .heading {
  color: #569CD6;
}

.copy-wrap { margin-bottom: 16px; }

.ai-guide {
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 12px;
}

.ai-logos {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.ai-link {
  padding: 8px 16px;
  border-radius: 8px;
  background: #f5f5f5;
  color: var(--text);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: background 0.2s;
}
.ai-link:hover { background: #e8e8e8; }

/* ---- Share Section ---- */
.share-section {
  background: white;
  padding: 24px 16px;
  text-align: center;
  border-top: 8px solid var(--bg);
}

.share-section h2 {
  font-size: 18px;
  margin-bottom: 8px;
}

.share-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

/* ---- Footer ---- */
.footer {
  text-align: center;
  padding: 24px 16px;
  color: var(--text-muted);
  font-size: 12px;
}

.footer a {
  color: var(--text-secondary);
  text-decoration: none;
}

.lang-toggle {
  margin-top: 12px;
}

.lang-btn {
  background: none;
  border: 1px solid #ddd;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  cursor: pointer;
  color: var(--text-muted);
  font-family: var(--font);
}

/* ---- Loading ---- */
.loading {
  text-align: center;
  padding: 40px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid #e0e0e0;
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Error ---- */
.error-msg {
  background: #FFF0F0;
  color: #CC3333;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  text-align: center;
  margin: 16px 0;
}

/* ---- Responsive ---- */
@media (min-width: 768px) {
  .container { max-width: 520px; }
  .hero h1 { font-size: 52px; }
  .hero .subtitle { font-size: 20px; }
}

@media (max-width: 374px) {
  .hero h1 { font-size: 34px; }
  .scores-grid { grid-template-columns: repeat(2, 1fr); }
  .scores-grid .score-item:nth-child(4),
  .scores-grid .score-item:nth-child(5) {
    grid-column: auto;
    justify-self: auto;
    padding: 0;
  }
}