:root {
  --bg-dark: #2d3436;
  --bg-medium: #353b48;
  --bg-light: #394852;
  --accent: #2e7d32;
  --accent-dark: #1b5e20;
  --border: #4a5568;
  --text: #dfe6e9;
  --text-muted: #aaa;
  --card-bg: #3d4f5f;
  --card-hover: #455a6a;
  --error: #e74c3c;
  --error-bg: rgba(231, 76, 60, 0.15);
  --success: #2e7d32;
  --success-bg: rgba(46, 125, 50, 0.15);
  --radius: 8px;
}

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

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

.container {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Login Page */
.login-card {
  background: var(--bg-medium);
  border-radius: var(--radius);
  padding: 32px 24px;
  margin-top: 20vh;
  border: 1px solid var(--border);
}

.login-card h1 {
  font-size: 24px;
  text-align: center;
  margin-bottom: 8px;
  color: #fff;
}

.login-card p {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 14px;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text);
}

.form-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 16px;
  outline: none;
  transition: border-color 0.2s;
  background: var(--bg-dark);
  color: var(--text);
}

.form-group input:focus {
  border-color: var(--accent);
}

.form-group input::placeholder {
  color: #777;
}

.btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: white;
}

.btn-primary:hover {
  box-shadow: 0 4px 15px rgba(46, 125, 50, 0.3);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  background: transparent;
  color: var(--text-muted);
  margin-top: 8px;
}

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

.alert {
  padding: 12px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
}

.alert-error {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid rgba(231, 76, 60, 0.3);
}

.alert-success {
  background: var(--success-bg);
  color: #4caf50;
  border: 1px solid rgba(46, 125, 50, 0.3);
}

/* App Page */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

.app-header h1 {
  font-size: 20px;
  color: #fff;
}

.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.btn-icon {
  background: none;
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: 14px;
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.2s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

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

.btn-logout {
  background: none;
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.2s;
}

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

.tab-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.tab {
  flex: 1;
  padding: 12px;
  text-align: center;
  border-radius: var(--radius);
  border: none;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.tab.active {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: white;
}

.tab:not(.active) {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.tab:not(.active):hover {
  background: var(--card-hover);
  color: var(--text);
}

/* Chat View - fills remaining space */
#chatView {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Chat Container */
#chat-container {
  flex: 1;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-medium);
  border: 1px solid var(--border);
  min-height: 0;
}

#chat-container iframe {
  border: none;
  width: 100%;
  height: 100%;
}

/* Upload Area */
.upload-area {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  border: 2px dashed var(--border);
  transition: all 0.2s;
}

.upload-area.dragover {
  border-color: var(--accent);
  background: rgba(46, 125, 50, 0.1);
}

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

.upload-area p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.upload-area input[type="file"] {
  display: none;
}

.btn-upload {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: white;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-upload:hover {
  box-shadow: 0 4px 15px rgba(46, 125, 50, 0.3);
  transform: translateY(-1px);
}

.upload-info {
  margin-top: 16px;
  font-size: 12px;
  color: #777;
}

.upload-status {
  margin-top: 16px;
}

.upload-progress {
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 8px;
}

.upload-progress-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.3s;
}

/* Admin Page */
.admin-container {
  max-width: 700px;
  margin: 0 auto;
  padding: 16px;
  min-height: 100vh;
  min-height: 100dvh;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.admin-header h1 {
  font-size: 22px;
  color: #fff;
  font-weight: 500;
}

.admin-back {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

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

.admin-section {
  background: var(--bg-medium);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.admin-section h2 {
  font-size: 16px;
  font-weight: 500;
  color: #fff;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* User Table */
.user-table {
  width: 100%;
  border-collapse: collapse;
}

.user-table th {
  text-align: left;
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}

.user-table td {
  padding: 12px;
  font-size: 14px;
  border-bottom: 1px solid rgba(74, 85, 104, 0.3);
  color: var(--text);
}

.user-table tr:hover td {
  background: rgba(69, 90, 106, 0.2);
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-admin {
  background: rgba(46, 125, 50, 0.2);
  color: #4caf50;
}

.badge-user {
  background: rgba(74, 85, 104, 0.3);
  color: var(--text-muted);
}

.btn-small {
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: none;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  margin-right: 4px;
}

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

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

/* Create User Form */
.form-row {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.form-row .form-group {
  flex: 1;
  margin-bottom: 0;
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.loading-text {
  color: var(--text-muted);
  text-align: center;
  padding: 20px;
}

/* Modal / Confirm */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--bg-medium);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 400px;
  width: 90%;
}

.modal h3 {
  color: #fff;
  margin-bottom: 12px;
}

.modal p {
  color: var(--text-muted);
  margin-bottom: 20px;
  font-size: 14px;
}

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

.modal-actions .btn {
  width: auto;
  padding: 8px 20px;
  font-size: 14px;
}

.btn-cancel {
  background: var(--card-bg);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

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

/* Responsive */
@media (max-width: 480px) {
  .container {
    padding: 8px;
    max-width: 100%;
  }
  .app-header {
    padding: 8px 0;
  }
  .app-header h1 {
    font-size: 18px;
  }
  .tab-bar {
    margin-bottom: 8px;
  }
  .tab {
    padding: 10px;
    font-size: 14px;
  }
  #chat-container {
    border-radius: 0;
    border-left: none;
    border-right: none;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 600px;
  }
  .admin-container {
    max-width: 800px;
  }
}

@media (max-width: 500px) {
  .form-row {
    flex-direction: column;
  }
  .user-table {
    font-size: 13px;
  }
  .user-table th,
  .user-table td {
    padding: 8px 6px;
  }
}

/* n8n Chat Widget - Dark Theme Override */
.n8n-chat {
  --chat--color-primary: #2e7d32 !important;
  --chat--color-primary-shade-50: #1b5e20 !important;
  --chat--color-primary-shade-100: #14431a !important;
  --chat--color-secondary: #394852 !important;
  --chat--color-secondary-shade-50: #353b48 !important;
  --chat--color-white: #dfe6e9 !important;
  --chat--color-light: #2d3436 !important;
  --chat--color-light-shade-50: #353b48 !important;
  --chat--color-medium: #4a5568 !important;
  --chat--color-dark: #dfe6e9 !important;
  --chat--color-disabled: #aaa !important;
  --chat--color-typing: #aaa !important;
  --chat--header--color-background: #1b5e20 !important;
  --chat--header--color-font: #fff !important;
  --chat--color-background: #353b48 !important;
  --chat--color-font: #dfe6e9 !important;
  --chat--message--bot--color-background: #3d4f5f !important;
  --chat--message--bot--color-font: #dfe6e9 !important;
  --chat--message--user--color-background: #2e7d32 !important;
  --chat--message--user--color-font: #fff !important;
  --chat--message--pre--color-background: #2d3436 !important;
  --chat--input--color-background: #2d3436 !important;
  --chat--input--color-font: #dfe6e9 !important;
  --chat--input--border: 1px solid #4a5568 !important;
  --chat--input--border-active: 1px solid #2e7d32 !important;
}

/* n8n Chat Widget - fixed height layout */
.n8n-chat {
  height: 100% !important;
  display: flex !important;
  flex-direction: column !important;
  overflow: hidden !important;
}

/* Chat body dark background */
.n8n-chat .chat-body {
  background: #353b48 !important;
  flex: 1 !important;
  min-height: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  overflow: hidden !important;
}

/* Chat messages list - scroll within fixed height */
.n8n-chat .chat-messages-list {
  background: #353b48 !important;
  overflow-y: auto !important;
  flex: 1 !important;
  min-height: 0 !important;
}

/* Bot message - transparent parent, dark bubble */
.n8n-chat .chat-message.chat-message-from-bot {
  background: transparent !important;
}

.n8n-chat .chat-message-from-bot .chat-message-markdown {
  background: #3d4f5f !important;
  color: #dfe6e9 !important;
}

/* User message - dark blue */
.n8n-chat .chat-message.chat-message-from-user {
  background: #1a3a5c !important;
}

/* Footer / Input area */
.n8n-chat .chat-footer {
  background: #394852 !important;
  border-top: 1px solid #4a5568 !important;
}

.n8n-chat .chat-input textarea {
  background: #2d3436 !important;
  color: #dfe6e9 !important;
  border-color: #4a5568 !important;
}

.n8n-chat .chat-input textarea::placeholder {
  color: #aaa !important;
}

/* Input controls area */
.n8n-chat .chat-inputs {
  background: #394852 !important;
  border-top: 1px solid #4a5568 !important;
}

/* Send button */
.n8n-chat .chat-input-send-button {
  background: #2e7d32 !important;
  color: #fff !important;
}

/* Scrollbar */
.n8n-chat ::-webkit-scrollbar {
  width: 6px;
}

.n8n-chat ::-webkit-scrollbar-track {
  background: transparent;
}

.n8n-chat ::-webkit-scrollbar-thumb {
  background: #4a5568;
  border-radius: 3px;
}

/* Hidden */
.hidden {
  display: none !important;
}