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

:root {
  --primary: #409eff;
  --primary-light: #66b1ff;
  --primary-bg: #ecf5ff;
  --green: #67c23a;
  --green-bg: #f0f9eb;
  --text: #303133;
  --text-secondary: #909399;
  --bg: #f0f4f8;
  --card: #ffffff;
  --border: #e4e7ed;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --radius: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

.page {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px 16px 32px;
}

/* Header */
.header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
}

.header-left {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.header-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-bg);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

.header h1 {
  font-size: 20px;
  font-weight: 700;
}

.subtitle {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.help-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  flex-shrink: 0;
}

/* Card */
.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 12px;
}

/* Record card */
.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 4px;
}

.badge-green {
  background: var(--green-bg);
  color: var(--green);
}

.link {
  font-size: 12px;
  color: var(--primary);
  text-decoration: none;
}

.record-area {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 8px 0;
}

.wave {
  width: 60px;
  height: 40px;
  opacity: 0.5;
  background: repeating-linear-gradient(
    90deg,
    var(--primary-light) 0px,
    var(--primary-light) 3px,
    transparent 3px,
    transparent 8px
  );
  border-radius: 4px;
  transition: opacity 0.3s;
}

.wave.active {
  opacity: 1;
  animation: wave-pulse 0.8s ease-in-out infinite alternate;
}

@keyframes wave-pulse {
  from { transform: scaleY(0.6); }
  to { transform: scaleY(1); }
}

.mic-btn {
  position: relative;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(64, 158, 255, 0.4);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  touch-action: none;
}

.mic-btn.recording {
  transform: scale(1.05);
  box-shadow: 0 4px 28px rgba(64, 158, 255, 0.6);
}

.mic-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px dashed var(--primary-light);
  opacity: 0;
  pointer-events: none;
}

.mic-btn.recording .mic-ring {
  opacity: 0.6;
  animation: ring-pulse 1.5s ease-out infinite;
}

.mic-ring-2 {
  animation-delay: 0.5s !important;
}

@keyframes ring-pulse {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.5); opacity: 0; }
}

.record-hint {
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 12px;
}

.timer {
  text-align: center;
  font-size: 14px;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  margin-top: 6px;
}

/* Features */
.features {
  display: flex;
  justify-content: space-around;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px 8px;
  margin-bottom: 12px;
  font-size: 11px;
  text-align: center;
}

.feature-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--text);
}

.feature-icon {
  font-size: 18px;
}

.feature-item small {
  color: var(--text-secondary);
  font-size: 10px;
}

/* Result — 紧跟录音区，滚动定位 */
.result-card {
  scroll-margin-top: 12px;
}

/* Upload */
.upload-toggle {
  display: none;
  width: 100%;
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
  text-align: left;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.upload-toggle-left h2 {
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.upload-toggle .upload-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.toggle-arrow {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  position: relative;
}

.toggle-arrow::before {
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--text-secondary);
  border-bottom: 2px solid var(--text-secondary);
  transform: rotate(45deg);
  margin: 2px auto 0;
  transition: transform 0.2s;
}

.upload-card.expanded .toggle-arrow::before {
  transform: rotate(-135deg);
  margin-top: 6px;
}

.upload-header {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  margin-bottom: 12px;
}

.upload-header h2 {
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.upload-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.btn-outline {
  border: 1px solid var(--primary);
  color: var(--primary);
  background: transparent;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.drop-zone {
  border: 2px dashed var(--primary-light);
  border-radius: 8px;
  padding: 28px 16px;
  text-align: center;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.drop-zone:hover,
.drop-zone.dragover {
  background: var(--primary-bg);
  border-color: var(--primary);
}

.drop-icon {
  color: var(--primary);
  margin-bottom: 8px;
}

.drop-zone p {
  font-size: 13px;
  color: var(--text);
}

.drop-hint {
  font-size: 11px !important;
  color: var(--text-secondary) !important;
  margin-top: 4px;
}

.tip-box {
  margin-top: 12px;
  background: var(--primary-bg);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 12px;
  color: var(--primary);
}

/* Result */
.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.result-header h2 {
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
}

.result-body {
  background: #f5f7fa;
  border-radius: 8px;
  padding: 14px;
  min-height: 80px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  word-break: break-all;
}

.result-body.loading {
  color: var(--text-secondary);
}

.result-footer {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-secondary);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 360px;
  width: 100%;
}

.modal-content h3 {
  margin-bottom: 12px;
}

.modal-content ul {
  padding-left: 20px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.modal-content li {
  margin-bottom: 6px;
}

.btn-primary {
  width: 100%;
  padding: 10px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
}

/* 手机端优化 */
@media (max-width: 640px) {
  .page {
    padding: 12px 12px 24px;
  }

  .header h1 {
    font-size: 18px;
  }

  .card-top {
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
  }

  .badge {
    font-size: 10px;
  }

  .mic-btn {
    width: 80px;
    height: 80px;
  }

  .wave {
    width: 48px;
    height: 32px;
  }

  .result-body {
    min-height: 64px;
    max-height: 160px;
    overflow-y: auto;
  }

  .upload-toggle {
    display: flex;
  }

  .upload-body {
    display: none;
    padding-top: 12px;
  }

  .upload-card.expanded .upload-body {
    display: block;
  }

  .drop-zone {
    padding: 20px 12px;
  }
}

.upload-title-desktop {
  display: none;
}

.upload-title-desktop h2 {
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 桌面端上传区始终展开 */
@media (min-width: 641px) {
  .upload-title-desktop {
    display: block;
    margin-bottom: 12px;
  }

  .upload-body {
    display: block;
    padding-top: 0;
  }

  .upload-card .upload-toggle {
    display: none;
  }

  .upload-body .upload-header {
    margin-bottom: 12px;
  }
}