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

:root {
  --bg-dark: #1e1e2e;
  --bg-medium: #252537;
  --bg-light: #2d2d44;
  --bg-input: #1a1a2e;
  --border: #3a3a55;
  --text: #e0e0e0;
  --text-muted: #8888aa;
  --accent: #7c6ff7;
  --accent-hover: #9180ff;
  --green: #4ec88b;
  --yellow: #e6c75d;
  --red: #e06070;
  --orange: #e09050;
  --blue: #5dadec;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ── Sidebar ─────────────────────────────────────────────────────────── */

#sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--bg-medium);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.sidebar-header button {
  background: var(--accent);
  color: #fff;
  border: none;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.sidebar-header button:hover {
  background: var(--accent-hover);
}

#collections-list {
  overflow-y: auto;
  flex: 1;
  padding: 8px;
}

.collection-item {
  margin-bottom: 4px;
}

.collection-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s;
  font-size: 13px;
  font-weight: 600;
}

.collection-header:hover {
  background: var(--bg-light);
}

.collection-header .collection-name {
  flex: 1;
}

.collection-header .collection-actions {
  display: none;
  gap: 4px;
}

.collection-header:hover .collection-actions {
  display: flex;
}

.collection-actions button {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  padding: 2px 4px;
  border-radius: 4px;
}

.collection-actions button:hover {
  color: var(--red);
  background: rgba(224, 96, 112, 0.1);
}

.collection-requests {
  padding-left: 12px;
}

.request-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: background 0.15s;
}

.request-item:hover {
  background: var(--bg-light);
}

.request-item .method-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  min-width: 42px;
  text-align: center;
}

.method-GET { background: rgba(78, 200, 139, 0.15); color: var(--green); }
.method-POST { background: rgba(93, 173, 236, 0.15); color: var(--blue); }
.method-PUT { background: rgba(224, 144, 80, 0.15); color: var(--orange); }
.method-PATCH { background: rgba(230, 199, 93, 0.15); color: var(--yellow); }
.method-DELETE { background: rgba(224, 96, 112, 0.15); color: var(--red); }
.method-HEAD { background: rgba(124, 111, 247, 0.15); color: var(--accent); }
.method-OPTIONS { background: rgba(136, 136, 170, 0.15); color: var(--text-muted); }

.request-item .request-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.request-item .btn-delete-request {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  padding: 0 4px;
}

.request-item:hover .btn-delete-request {
  display: block;
}

.request-item .btn-delete-request:hover {
  color: var(--red);
}

/* ── Main ────────────────────────────────────────────────────────────── */

#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Request Tabs Bar ────────────────────────────────────────────────── */

#request-tabs-bar {
  display: flex;
  align-items: center;
  background: var(--bg-medium);
  border-bottom: 1px solid var(--border);
  min-height: 38px;
  overflow: hidden;
}

#request-tabs {
  display: flex;
  overflow-x: auto;
  flex: 1;
  scrollbar-width: none;
}

#request-tabs::-webkit-scrollbar {
  display: none;
}

.request-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  font-size: 12px;
  cursor: pointer;
  border-right: 1px solid var(--border);
  white-space: nowrap;
  transition: background 0.15s;
  min-width: 0;
  max-width: 200px;
  color: var(--text-muted);
}

.request-tab:hover {
  background: var(--bg-light);
}

.request-tab.active {
  background: var(--bg-dark);
  color: var(--text);
}

.request-tab .tab-method {
  font-size: 9px;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 3px;
  flex-shrink: 0;
}

.request-tab .tab-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.request-tab .tab-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 14px;
  cursor: pointer;
  padding: 0 2px;
  line-height: 1;
  border-radius: 3px;
  flex-shrink: 0;
  opacity: 0;
  transition: all 0.15s;
}

.request-tab:hover .tab-close,
.request-tab.active .tab-close {
  opacity: 1;
}

.request-tab .tab-close:hover {
  color: var(--red);
  background: rgba(224, 96, 112, 0.15);
}

#btn-new-tab {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  padding: 6px 12px;
  flex-shrink: 0;
  transition: color 0.15s;
}

#btn-new-tab:hover {
  color: var(--text);
}

/* ── Request Bar ─────────────────────────────────────────────────────── */

#request-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

#method-select {
  background: var(--bg-light);
  color: var(--green);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  min-width: 100px;
}

#method-select option {
  background: var(--bg-medium);
  color: var(--text);
}

#url-input {
  flex: 1;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-family: 'Consolas', 'Fira Code', monospace;
  outline: none;
  transition: border-color 0.2s;
}

#url-input:focus {
  border-color: var(--accent);
}

#btn-send {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

#btn-send:hover {
  background: var(--accent-hover);
}

#btn-send:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

#btn-save {
  background: var(--bg-light);
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

#btn-save:hover {
  color: var(--text);
  border-color: var(--accent);
}

/* ── Tabs ────────────────────────────────────────────────────────────── */

.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
}

.tab {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 10px 16px;
  font-size: 13px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.tab:hover {
  color: var(--text);
}

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-panel {
  display: none;
  padding: 12px 16px;
}

.tab-panel.active {
  display: block;
}

/* ── Request Config ──────────────────────────────────────────────────── */

#request-config {
  border-bottom: 1px solid var(--border);
  max-height: 300px;
  overflow-y: auto;
}

/* ── Key-Value Rows ──────────────────────────────────────────────────── */

.kv-row {
  display: flex;
  gap: 8px;
  margin-bottom: 6px;
  align-items: center;
}

.kv-row input {
  flex: 1;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-family: 'Consolas', 'Fira Code', monospace;
  outline: none;
}

.kv-row input:focus {
  border-color: var(--accent);
}

.btn-remove-row {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all 0.15s;
}

.btn-remove-row:hover {
  color: var(--red);
  background: rgba(224, 96, 112, 0.1);
}

.btn-small {
  background: none;
  border: 1px dashed var(--border);
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  margin-top: 4px;
  transition: all 0.2s;
}

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

/* ── Body Editor ─────────────────────────────────────────────────────── */

.body-type-selector {
  display: flex;
  gap: 16px;
  margin-bottom: 10px;
  font-size: 13px;
}

.body-type-selector label {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  color: var(--text-muted);
}

.body-type-selector input[type="radio"] {
  accent-color: var(--accent);
}

#body-editor {
  width: 100%;
  min-height: 120px;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px;
  border-radius: 8px;
  font-size: 13px;
  font-family: 'Consolas', 'Fira Code', monospace;
  resize: vertical;
  outline: none;
  tab-size: 2;
}

#body-editor:focus {
  border-color: var(--accent);
}

#body-editor:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── Response Section ────────────────────────────────────────────────── */

#response-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#response-bar {
  display: flex;
  gap: 16px;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  align-items: center;
}

#response-status {
  padding: 4px 12px;
  border-radius: 6px;
  font-family: 'Consolas', monospace;
}

#response-time, #response-size {
  color: var(--text-muted);
  font-weight: 400;
}

.status-2xx { background: rgba(78, 200, 139, 0.15); color: var(--green); }
.status-3xx { background: rgba(93, 173, 236, 0.15); color: var(--blue); }
.status-4xx { background: rgba(230, 199, 93, 0.15); color: var(--yellow); }
.status-5xx { background: rgba(224, 96, 112, 0.15); color: var(--red); }
.status-error { background: rgba(224, 96, 112, 0.15); color: var(--red); }

#response-section .tab-panel {
  flex: 1;
  overflow-y: auto;
}

#response-body, #response-headers {
  font-family: 'Consolas', 'Fira Code', monospace;
  font-size: 13px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
}

/* ── Modals ───────────────────────────────────────────────────────────── */

.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-content {
  background: var(--bg-medium);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  min-width: 360px;
  max-width: 440px;
}

.modal-content h3 {
  margin-bottom: 16px;
  font-size: 16px;
}

.modal-content label {
  display: block;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

.modal-content input,
.modal-content select {
  display: block;
  width: 100%;
  margin-top: 6px;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
  outline: none;
}

.modal-content input:focus,
.modal-content select:focus {
  border-color: var(--accent);
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
}

.modal-actions button {
  padding: 8px 20px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  border: none;
  transition: background 0.2s;
}

.modal-actions button:first-child {
  background: var(--accent);
  color: #fff;
}

.modal-actions button:first-child:hover {
  background: var(--accent-hover);
}

.modal-actions button:last-child {
  background: var(--bg-light);
  color: var(--text-muted);
}

.modal-actions button:last-child:hover {
  color: var(--text);
}

/* ── Loading ─────────────────────────────────────────────────────────── */

.loading #btn-send {
  position: relative;
}

.loading #btn-send::after {
  content: '';
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-left: 8px;
  vertical-align: middle;
}

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

/* ── Scrollbar ───────────────────────────────────────────────────────── */

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #4a4a66;
}

/* ── Collapse arrow ──────────────────────────────────────────────────── */

.collapse-arrow {
  display: inline-block;
  transition: transform 0.2s;
  font-size: 10px;
  margin-right: 6px;
  color: var(--text-muted);
}

.collapse-arrow.open {
  transform: rotate(90deg);
}

/* ── Login Page ──────────────────────────────────────────────────────── */

.login-page {
  justify-content: center;
  align-items: center;
}

.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.login-box {
  background: var(--bg-medium);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 380px;
}

.login-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  text-align: center;
  margin-bottom: 4px;
}

.login-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 32px;
}

.login-field {
  margin-bottom: 16px;
}

.login-field label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.login-field input {
  width: 100%;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.login-field input:focus {
  border-color: var(--accent);
}

.login-error {
  background: rgba(224, 96, 112, 0.1);
  color: var(--red);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 16px;
  text-align: center;
}

#login-btn {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 8px;
}

#login-btn:hover {
  background: var(--accent-hover);
}

#login-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ── User Bar (sidebar footer) ───────────────────────────────────────── */

.sidebar-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}

.sidebar-footer .user-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-footer .btn-logout {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}