/* style.css */
:root {
  --bg-primary: #f5f5f5;
  --bg-secondary: #ffffff;
  --bg-tertiary: #fafafa;
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --border-color: #e0e0e0;
  --accent-color: #ff6c37;
  --accent-hover: #e55a2b;
  --success-color: #28a745;
  --error-color: #dc3545;
  --info-color: #17a2b8;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
  --radius: 8px;
}

[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #252525;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --border-color: #404040;
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

.container { max-width: 1400px; margin: 0 auto; padding: 20px; }

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.header h1 { font-size: 24px; color: var(--accent-color); }

.header-controls { display: flex; gap: 12px; align-items: center; }

.toggle-btn {
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s;
  min-width: 90px;
}

.toggle-btn:hover {
  border-color: var(--accent-color);
  background: var(--bg-secondary);
}

/* Main Layout */
.main-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 20px;
}

/* Sidebar */
.sidebar {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  height: fit-content;
}

.sidebar h3 {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.history-list { max-height: 400px; overflow-y: auto; }

.history-item {
  padding: 10px 12px;
  border-radius: 6px;
  cursor: pointer;
  margin-bottom: 6px;
  transition: background 0.2s;
  border-left: 3px solid transparent;
}

.history-item:hover { background: var(--bg-tertiary); }

.history-item .method {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  margin-right: 8px;
}

.method-GET { background: #e3f2fd; color: #1976d2; }
.method-POST { background: #e8f5e9; color: #388e3c; }
.method-PUT { background: #fff3e0; color: #f57c00; }
.method-DELETE { background: #ffebee; color: #d32f2f; }
.method-PATCH { background: #f3e5f5; color: #7b1fa2; }

.history-item .url {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-item .time {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.clear-history {
  width: 100%;
  padding: 8px;
  margin-top: 12px;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
}

.clear-history:hover { border-color: var(--error-color); color: var(--error-color); }

/* Content */
.content { display: flex; flex-direction: column; gap: 20px; }

/* Panels */
.request-panel, .response-panel {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

.panel-title { font-size: 16px; font-weight: 600; margin-bottom: 16px; color: var(--text-primary); }

/* URL Bar */
.url-bar { display: flex; gap: 12px; margin-bottom: 16px; }

.method-select {
  padding: 10px 16px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  min-width: 100px;
}

.url-input {
  flex: 1;
  padding: 10px 16px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 14px;
}

.url-input:focus { outline: none; border-color: var(--accent-color); }

.send-btn {
  padding: 10px 28px;
  background: var(--accent-color);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.send-btn:hover { background: var(--accent-hover); }
.send-btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ===== Collapsible Section ===== */
.collapsible-section {
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-top: 8px;
  overflow: hidden;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  cursor: pointer;
  user-select: none;
  transition: background 0.2s;
}

.section-header:hover {
  background: var(--bg-primary);
}

.section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.section-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  padding: 4px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s;
}

.collapsible-section[data-expanded="true"] .section-toggle {
  transform: rotate(90deg);
}

.collapsible-section[data-expanded="false"] .section-toggle {
  transform: rotate(0deg);
}

.section-body {
  padding: 16px;
  background: var(--bg-secondary);
}

.collapsible-section[data-expanded="false"] .section-body {
  display: none;
}

.collapsible-section[data-expanded="true"] .section-body {
  display: block;
  animation: slideDown 0.2s ease;
}

@keyframes slideDown {
  from { opacity: 0; max-height: 0; }
  to { opacity: 1; max-height: 2000px; }
}

/* Headers Table */
.headers-table { width: 100%; border-collapse: collapse; }

.headers-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-color);
}

.headers-table td { padding: 8px 12px; border-bottom: 1px solid var(--border-color); }

.header-input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 13px;
}

.header-input:focus { outline: none; border-color: var(--accent-color); }

.header-select {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 13px;
  cursor: pointer;
}

.remove-btn {
  padding: 6px 12px;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}

.remove-btn:hover { border-color: var(--error-color); color: var(--error-color); }

.add-btn {
  margin-top: 12px;
  padding: 8px 16px;
  background: var(--bg-tertiary);
  border: 1px dashed var(--border-color);
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}

.add-btn:hover { border-color: var(--accent-color); color: var(--accent-color); }

/* Body Section */
.body-type-select {
  margin-bottom: 12px;
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 13px;
  cursor: pointer;
}

.body-editor {
  width: 100%;
  min-height: 200px;
  padding: 16px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 13px;
  line-height: 1.6;
  resize: vertical;
}

.body-editor:focus { outline: none; border-color: var(--accent-color); }

/* Response */
.response-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 16px;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border-radius: 6px;
}

.meta-item { display: flex; align-items: center; gap: 6px; font-size: 13px; }
.meta-label { color: var(--text-secondary); }
.meta-value { font-weight: 600; color: var(--text-primary); }

.meta-value.status-success { color: var(--success-color); }
.meta-value.status-error { color: var(--error-color); }
.meta-value.status-info { color: var(--info-color); }

.response-body {
  background: var(--bg-tertiary);
  border-radius: 6px;
  padding: 16px;
  min-height: 200px;
  max-height: 500px;
  overflow: auto;
}

.response-body pre {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--text-primary);
}

.json-key { color: #0066cc; }
.json-string { color: #008000; }
.json-number { color: #ff6600; }
.json-boolean { color: #6600cc; }
.json-null { color: #999; }

[data-theme="dark"] .json-key { color: #66b3ff; }
[data-theme="dark"] .json-string { color: #7ec699; }
[data-theme="dark"] .json-number { color: #f08d49; }
[data-theme="dark"] .json-boolean { color: #cc99ff; }

.empty-state { text-align: center; padding: 60px 20px; color: var(--text-secondary); }

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal-overlay.active { display: flex; }

.modal {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 24px;
  width: 400px;
  max-width: 90vw;
}

.modal h3 { margin-bottom: 20px; }

.form-group { margin-bottom: 16px; }

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

.form-group input, .form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 14px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

.btn-secondary {
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
}

.btn-primary {
  padding: 8px 16px;
  background: var(--accent-color);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.copy-btn {
  position: absolute;
  top: 8px; right: 8px;
  padding: 4px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 11px;
  cursor: pointer;
  color: var(--text-secondary);
}

.copy-btn:hover { border-color: var(--accent-color); color: var(--accent-color); }

.response-body-wrapper { position: relative; }

/* Responsive */
@media (max-width: 900px) {
  .main-layout { grid-template-columns: 1fr; }
  .sidebar { order: 2; }
  .url-bar { flex-wrap: wrap; }
  .method-select { min-width: 80px; }
  .send-btn { width: 100%; }
}