:root {
  --bg: #0f0f14;
  --bg-card: #16161e;
  --bg-input: #1a1a24;
  --border: #2a2a3a;
  --text: #e4e4e7;
  --text-muted: #71717a;
  --accent: #7c3aed;
  --accent-hover: #8b5cf6;
  --success: #22c55e;
  --error: #ef4444;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --input-padding: 0.75rem 1rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', 'SF Pro Text', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.01em;
}

/* Login */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: radial-gradient(ellipse at 50% 0%, rgba(124, 58, 237, 0.15) 0%, transparent 50%);
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  animation: fadeUp 0.4s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.login-card h1 {
  margin: 0 0 1.5rem;
  font-size: 1.5rem;
  font-weight: 600;
}

.login-card label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.login-card input {
  width: 100%;
  padding: var(--input-padding);
  margin-bottom: 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.login-card input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.2);
}

.login-card .btn-primary {
  width: 100%;
  padding: 0.85rem;
}

.login-card .error-msg {
  margin-top: 0.75rem;
  color: var(--error);
  font-size: 0.9rem;
  min-height: 1.2em;
}

/* App layout */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 0.75rem;
}

.app-header h1 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}

.app-nav {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.app-nav a,
.app-nav button {
  padding: 0.5rem 1rem;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 8px;
  font-size: 0.9rem;
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

.app-nav a:hover,
.app-nav button:hover {
  color: var(--text);
  background: var(--bg-input);
}

.app-nav a.active {
  color: var(--accent);
  background: rgba(124, 58, 237, 0.15);
}

.main-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.5rem;
}

.page {
  display: none;
  animation: fadeIn 0.3s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 1rem;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

/* ========== Общие кнопки и инпуты ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

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

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

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: var(--input-padding);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="text"]:focus,
input[type="password"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.2);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.85;
}

textarea::placeholder {
  font-style: normal;
}

/* Hierarchy */
.hierarchy-form {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: flex-end;
}

.hierarchy-form label {
  flex: 1;
  min-width: 180px;
}

.hierarchy-form label span {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.hierarchy-form input {
  width: 100%;
}

.hierarchy-result {
  margin-top: 1.5rem;
}

.hierarchy-error {
  color: var(--error);
  padding: 1rem;
  background: rgba(239, 68, 68, 0.1);
  border-radius: 8px;
}

.tree-root {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.tree-node {
  margin: 0.5rem 0;
  padding-left: 1.25rem;
  border-left: 2px solid var(--border);
  position: relative;
  animation: slideIn 0.35s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-8px); }
  to { opacity: 1; transform: translateX(0); }
}

.tree-node::before {
  content: '';
  position: absolute;
  left: -2px;
  top: 0.6rem;
  width: 10px;
  height: 2px;
  background: var(--border);
}

.tree-node .node-card {
  display: inline-block;
  padding: 0.6rem 1rem;
  background: var(--bg-input);
  border-radius: 8px;
  border: 1px solid var(--border);
  margin-bottom: 0.25rem;
}

.tree-node .node-card.current {
  border-color: var(--accent);
  background: rgba(124, 58, 237, 0.12);
}

.tree-node .node-card .tg-id {
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--accent);
}

.tree-node .node-card .username {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.tree-children {
  list-style: none;
  padding-left: 1.25rem;
  margin-top: 0.5rem;
}

.parents-section {
  margin-bottom: 1.5rem;
}

.parents-section h3 {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin: 0 0 0.75rem;
}

.parents-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.parents-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.parents-list li:last-child {
  border-bottom: none;
}

.parents-list .node-card {
  padding: 0.5rem 0.75rem;
  background: var(--bg-input);
  border-radius: 8px;
  font-size: 0.9rem;
}

/* Settings — кнопка под инпутами */
.settings-form .form-group {
  margin-bottom: 1.25rem;
}

.settings-form .form-group input {
  max-width: 320px;
}

.settings-form .form-actions {
  margin-top: 1.5rem;
  padding-top: 1rem;
}

.settings-form .form-actions .btn-primary {
  min-width: 180px;
}

.settings-form .success-msg {
  color: var(--success);
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

.settings-form .error-msg {
  color: var(--error);
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

/* Вкладки настроек */
.settings-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

.settings-tab {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text-muted);
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

.settings-tab:hover {
  color: var(--text);
  background: var(--bg-input);
}

.settings-tab.active {
  color: var(--accent);
  background: rgba(124, 58, 237, 0.15);
}

.settings-tab-pane {
  display: none;
}

.settings-tab-pane.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

/* Dashboard placeholder */
.dashboard-welcome {
  color: var(--text);
  font-size: 1rem;
  line-height: 1.65;
  max-width: 56ch;
}

.dashboard-welcome code {
  background: var(--bg-input);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  font-size: 0.9em;
  color: var(--accent);
}

.loading {
  color: var(--text-muted);
  padding: 1rem 0;
}

/* Тексты / контент */
.content-block {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.content-block:last-of-type {
  border-bottom: none;
}

.content-block-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  margin: 0 0 1rem;
}

.text-hint {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  line-height: 1.55;
}

.text-hint code {
  background: var(--bg-input);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85rem;
}

.content-field {
  margin-bottom: 1.25rem;
}

.content-field label,
.settings-form .form-group label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.01em;
}

.content-field label {
  color: var(--text-muted);
}

.settings-form .form-group label {
  color: var(--text-muted);
}

.content-field textarea {
  width: 100%;
  min-height: 80px;
  padding: var(--input-padding);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.content-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.2);
}

.content-field input[type="text"] {
  max-width: 100%;
}

/* Блок прикрепления файла */
.file-upload-wrap {
  position: relative;
  margin-top: 0.5rem;
}

.file-upload-wrap input[type="file"] {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  opacity: 0;
  cursor: pointer;
  z-index: 1;
}

.file-upload-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  background: var(--bg-input);
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.file-upload-wrap:hover .file-upload-label,
.file-upload-wrap input:focus + .file-upload-label {
  border-color: var(--accent);
  color: var(--text);
  background: rgba(124, 58, 237, 0.08);
}

.file-upload-icon {
  font-size: 1.1rem;
}

.file-upload-wrap input[type="file"]:valid + .file-upload-label {
  border-style: solid;
  border-color: var(--success);
  color: var(--success);
}

.image-preview-wrap {
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.image-preview-wrap .current-image {
  max-width: 200px;
  max-height: 150px;
  object-fit: contain;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.image-preview-wrap .no-image {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.image-preview-wrap .btn-remove-image {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  background: transparent;
  color: var(--error);
  border: 1px solid var(--error);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.image-preview-wrap .btn-remove-image:hover {
  background: rgba(239, 68, 68, 0.15);
}

.field-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

/* Кнопка и блок действий в форме «Тексты» */
#contentForm .form-actions {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

#contentForm .form-actions .btn-primary {
  min-width: 200px;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

/* Список пользователей и иерархия */
.hierarchy-list-toolbar {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.search-input {
  flex: 1;
  min-width: 200px;
}

.users-list-wrap {
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.users-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.users-table th,
.users-table td {
  padding: 0.65rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
  line-height: 1.45;
  letter-spacing: 0.01em;
}

.users-table th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.users-table td {
  color: var(--text);
}

.users-table .cell-id {
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
  width: 3rem;
}

.users-table .cell-tg {
  font-family: 'SF Mono', 'Consolas', monospace;
  font-size: 0.9rem;
  color: var(--accent);
}

.users-table .cell-username {
  color: var(--text);
}

.users-table .cell-parent {
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.user-row {
  cursor: pointer;
  transition: background 0.15s;
}

.user-row:hover {
  background: var(--bg-input);
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0;
}

.users-table .tg-id-cell {
  font-family: monospace;
  color: var(--accent);
}