/* Shared tool page styles */
:root {
  --bg: #f8f9fa;
  --card-bg: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #86868b;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --border: #e5e5ea;
  --radius: 20px;
  --shadow: 0 2px 20px rgba(0,0,0,0.04);
  --success: #34c759;
  --danger: #ff3b30;
  --warning: #ff9500;
}

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

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.header {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 12px 0;
}

.header-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.back-btn {
  text-decoration: none;
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border-radius: 8px;
  transition: background 0.2s;
}

.back-btn:hover { background: rgba(0,113,227,0.08); }

.page-title {
  font-size: 18px;
  font-weight: 600;
}

/* Main container */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 24px 60px;
}

/* Tool card */
.tool-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px;
  border: 1px solid var(--border);
  margin-bottom: 20px;
}

.tool-card h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.tool-card .desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}

/* Upload area */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: 16px;
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s;
  margin-bottom: 20px;
}

.upload-area:hover, .upload-area.dragover {
  border-color: var(--accent);
  background: rgba(0,113,227,0.03);
}

.upload-area .icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.upload-area p {
  font-size: 15px;
  color: var(--text-secondary);
}

.upload-area .sub {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 8px;
}

.upload-area.has-file {
  border-color: var(--success);
  background: rgba(52,199,89,0.03);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-secondary {
  background: #f0f0f0;
  color: var(--text);
}

.btn-secondary:hover { background: #e5e5e5; }

.btn-success {
  background: var(--success);
  color: white;
}

.btn-success:hover { background: #2db84e; }

.btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}

/* Result area */
.result-area {
  margin-top: 20px;
  display: none;
}

.result-area.show { display: block; }

.result-box {
  background: #f5f5f7;
  border-radius: 12px;
  padding: 20px;
  font-size: 14px;
  line-height: 1.8;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 400px;
  overflow-y: auto;
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.result-table th, .result-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.result-table th {
  background: #f5f5f7;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.result-table tr:hover td {
  background: #fafafa;
}

/* Input */
.input-group {
  margin-bottom: 16px;
}

.input-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.input-field {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
  background: var(--card-bg);
}

.input-field:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,113,227,0.1);
}

textarea.input-field {
  min-height: 120px;
  resize: vertical;
  line-height: 1.6;
}

/* Loading */
.loading {
  display: none;
  text-align: center;
  padding: 24px;
}

.loading.show { display: block; }

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}

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

.loading p { color: var(--text-secondary); font-size: 14px; }

/* Error */
.error-msg {
  background: #fff2f0;
  border: 1px solid #ffccc7;
  border-radius: 12px;
  padding: 12px 16px;
  color: var(--danger);
  font-size: 14px;
  margin-top: 12px;
  display: none;
}

.error-msg.show { display: block; }

/* Copy toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: rgba(0,0,0,0.8);
  color: white;
  padding: 10px 24px;
  border-radius: 12px;
  font-size: 14px;
  opacity: 0;
  transition: all 0.3s;
  pointer-events: none;
  z-index: 999;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Ad slot */
.ad-slot {
  margin: 24px 0;
  padding: 16px;
  background: #f5f5f7;
  border-radius: 16px;
  text-align: center;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed #ddd;
  color: #999;
  font-size: 13px;
  overflow: hidden;
}

.ad-slot-side {
  margin: 0;
  min-height: 300px;
}

@media (max-width: 640px) {
  .ad-slot { min-height: 100px; }
  .ad-slot-side { min-height: 100px; }
  .footer { font-size: 11px; }
  .footer .sep { margin: 0 6px; }
}

/* Footer */
.footer {
  text-align: center;
  padding: 32px 24px;
  font-size: 13px;
}
.footer p {
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0;
}
.footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.footer a:hover {
  color: var(--accent);
}
.footer .sep {
  margin: 0 10px;
  color: #d2d2d7;
}

/* Animations */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.tool-card { animation: fadeUp 0.4s ease both; }

/* File info */
.file-info {
  display: none;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: #f5f5f7;
  border-radius: 12px;
  margin-bottom: 16px;
}

.file-info.show { display: flex; }

.file-info .name {
  flex: 1;
  font-size: 14px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-info .size {
  font-size: 12px;
  color: var(--text-secondary);
}

.file-info .remove-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 18px;
  padding: 4px;
  line-height: 1;
}

.file-info .remove-btn:hover { color: var(--danger); }

/* Two column layout */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 640px) {
  .container { padding: 20px 16px 40px; }
  .tool-card { padding: 20px; }
  .upload-area { padding: 32px 16px; }
  .two-col { grid-template-columns: 1fr; }
  .header-inner { padding: 0 16px; }
}