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

:root {
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

[data-theme="dark"] {
  --bg-primary: #1e1e2e;
  --bg-secondary: #181825;
  --bg-tertiary: #313244;
  --bg-card: #2a2a3a;
  --bg-input: #232334;
  --text-primary: #e0e0e0;
  --text-secondary: #b0b0c0;
  --text-muted: #888898;
  --accent: #4ecdc4;
  --accent-hover: #3dbdb5;
  --accent-dim: rgba(78, 205, 196, 0.15);
  --border: #3a3a4e;
  --danger: #e74c3c;
  --danger-hover: #c0392b;
  --success: #2ecc71;
  --scrollbar-thumb: #3a3a4e;
  --scrollbar-track: #1e1e2e;
  --shadow: rgba(0, 0, 0, 0.3);
  --titlebar-bg: #151520;
  --badge-bg: #4ecdc4;
  --badge-text: #1e1e2e;
}

[data-theme="light"] {
  --bg-primary: #f8f9fc;
  --bg-secondary: #eef0f5;
  --bg-tertiary: #dfe2ea;
  --bg-card: #ffffff;
  --bg-input: #eef0f5;
  --text-primary: #1e1e2e;
  --text-secondary: #555568;
  --text-muted: #888898;
  --accent: #2ba89e;
  --accent-hover: #239088;
  --accent-dim: rgba(43, 168, 158, 0.1);
  --border: #d5d8e0;
  --danger: #e74c3c;
  --danger-hover: #c0392b;
  --success: #27ae60;
  --scrollbar-thumb: #c0c4cc;
  --scrollbar-track: #eef0f5;
  --shadow: rgba(0, 0, 0, 0.06);
  --titlebar-bg: #e4e7ed;
  --badge-bg: #2ba89e;
  --badge-text: #ffffff;
}

html, body {
  height: 100%;
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* Title bar */
.titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
  background: var(--titlebar-bg);
  border-bottom: 1px solid var(--border);
  border-radius: 7px 7px 0 0;
  -webkit-app-region: drag;
  user-select: none;
}

.titlebar-drag {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 12px;
}

.titlebar-icon {
  width: 18px;
  height: 18px;
  -webkit-app-region: no-drag;
}

.titlebar-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.titlebar-controls {
  display: flex;
  -webkit-app-region: no-drag;
}

.titlebar-btn {
  width: 46px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}

.titlebar-btn:hover { background: var(--bg-tertiary); }
.titlebar-btn-close:hover { background: var(--danger); color: #fff; }

/* App layout */
.app-container {
  display: flex;
  height: calc(100vh - 36px);
}

/* Sidebar */
.sidebar {
  width: 260px;
  min-width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 12px 12px 10px;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.sidebar-search {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0 8px;
  transition: border-color 0.15s;
}

.sidebar-search:focus-within { border-color: var(--accent); }

.sidebar-search svg { color: var(--text-muted); flex-shrink: 0; }

.sidebar-search-input {
  width: 100%;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 12px;
  font-family: var(--font);
  padding: 6px 0;
  outline: none;
}

.sidebar-search-input::placeholder { color: var(--text-muted); }

.sidebar-inbox {
  padding: 8px 8px 0;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.sidebar-inbox .sidebar-number {
  margin-bottom: 0;
}

.sidebar-inbox-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

.sidebar-numbers {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.sidebar-empty {
  padding: 20px 12px;
  color: var(--text-muted);
  font-size: 13px;
  text-align: center;
  line-height: 1.5;
}

.sidebar-number {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
  margin-bottom: 2px;
}

.sidebar-number:hover { background: var(--bg-tertiary); }
.sidebar-number.active { background: var(--accent-dim); border-left: 3px solid var(--accent); }

.sidebar-number-info {
  flex: 1;
  min-width: 0;
}

.sidebar-number-name {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-number-num {
  font-size: 11px;
  color: var(--text-muted);
  font-family: 'Consolas', 'Courier New', monospace;
}

.sidebar-badge {
  background: var(--badge-bg);
  color: var(--badge-text);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 10px;
  min-width: 20px;
  text-align: center;
}

.sidebar-footer {
  padding: 8px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.15s;
  width: 100%;
  text-align: left;
}

.sidebar-btn:hover { background: var(--bg-tertiary); color: var(--text-primary); }

/* Main content */
.main-content {
  flex: 1;
  overflow-y: auto;
  background: var(--bg-primary);
}

.view {
  height: 100%;
}

/* Welcome screen */
.dashboard-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 16px;
  color: var(--text-muted);
}

.welcome-icon {
  width: 80px;
  height: 80px;
  opacity: 0.4;
}

.dashboard-welcome h1 {
  font-size: 24px;
  color: var(--text-secondary);
}

.dashboard-welcome p {
  font-size: 14px;
  max-width: 400px;
  text-align: center;
  line-height: 1.5;
}

/* Messages */
.messages-container {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.messages-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.messages-header-info h2 {
  font-size: 18px;
  font-weight: 600;
}

.messages-header-info span {
  font-size: 12px;
  color: var(--text-muted);
  font-family: 'Consolas', 'Courier New', monospace;
}

.messages-header-actions {
  display: flex;
  gap: 8px;
}

.btn-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-family: var(--font);
  transition: all 0.15s;
}

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

.messages-list {
  flex: 1;
  overflow-y: auto;
  padding: 16px 24px;
}

.message-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 10px;
  transition: all 0.15s;
  cursor: pointer;
}

.message-card:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

/* Unread messages */
.message-unread {
  border-left: 3px solid var(--accent);
}

.message-unread .message-sender {
  color: var(--accent);
}

/* Truncated messages */
.message-truncated .message-body {
  max-height: 3em;
  overflow: hidden;
  position: relative;
}

.message-truncated .message-body::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1.5em;
  background: linear-gradient(transparent, var(--bg-card));
  pointer-events: none;
}

.message-truncated:hover .message-body::after {
  background: linear-gradient(transparent, var(--bg-primary));
}

.message-truncated.expanded .message-body {
  max-height: none;
  overflow: visible;
}

.message-truncated.expanded .message-body::after {
  display: none;
}

.message-expand-hint {
  font-size: 11px;
  color: var(--accent);
  margin-top: 4px;
  opacity: 0.7;
}

.message-truncated.expanded .message-expand-hint {
  display: none;
}

.message-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.message-sender {
  font-weight: 600;
  font-size: 14px;
  color: var(--text-secondary);
}

.message-time {
  font-size: 12px;
  color: var(--text-muted);
}

.message-recipient {
  font-size: 11px;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
  white-space: nowrap;
}

.message-body {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  word-break: break-word;
}

.messages-loading, .messages-error {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
}

.messages-error { color: var(--danger); }

/* Settings layout */
.settings-layout {
  display: flex;
  height: 100%;
}

.settings-nav {
  width: 220px;
  min-width: 220px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 16px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.settings-nav-footer {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.settings-nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  color: var(--text-muted);
  font-size: 13px;
  text-decoration: none;
  border-radius: 8px;
  transition: all 0.15s;
  cursor: pointer;
}

.settings-nav-link:hover {
  background: var(--bg-tertiary);
  color: var(--accent);
}

.settings-nav-header {
  font-size: 18px;
  font-weight: 700;
  padding: 8px 12px 16px;
  color: var(--text-primary);
}

.settings-tab {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-family: var(--font);
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.15s;
  text-align: left;
  width: 100%;
}

.settings-tab:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.settings-tab.active { background: var(--accent-dim); color: var(--accent); font-weight: 600; }

.settings-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px 32px;
}

.settings-panel {
  display: none;
}

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

.settings-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 16px;
}

.settings-panel-header h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.settings-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 18px 0;
}

.form-help {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Search box */
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0 12px;
  flex: 1;
  max-width: 320px;
  transition: border-color 0.15s;
}

.search-box:focus-within { border-color: var(--accent); }

.search-box svg { color: var(--text-muted); flex-shrink: 0; }

.search-input {
  border: none !important;
  background: transparent !important;
  padding: 8px 0 !important;
  font-size: 13px !important;
}

.search-input:focus { border-color: transparent !important; }

.phone-numbers-footer {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 12px;
}

.phone-count {
  font-size: 12px;
  color: var(--text-muted);
}

.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.input {
  width: 100%;
  padding: 9px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.15s;
}

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

select.input {
  cursor: pointer;
}

/* Toggle / Checkbox alignment */
.toggle-label {
  display: inline-flex !important;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 14px !important;
  line-height: 1;
}

.toggle {
  width: 16px;
  height: 16px;
  margin: 0;
  flex-shrink: 0;
  accent-color: var(--accent);
  cursor: pointer;
  vertical-align: middle;
}

/* API key / phone number entries */
.entry-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  margin-bottom: 10px;
  padding: 12px;
  background: var(--bg-input);
  border-radius: 8px;
  border: 1px solid var(--border);
}

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

.entry-row .form-group label {
  margin-bottom: 4px;
}

.btn {
  padding: 9px 18px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
  font-family: var(--font);
}

.btn-primary {
  background: var(--accent);
  color: #1e1e2e;
  font-weight: 600;
}

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

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-secondary:hover { background: var(--border); }

.btn-danger {
  background: var(--danger);
  color: #fff;
  padding: 7px 12px;
}

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

.btn-small {
  padding: 6px 12px;
  font-size: 12px;
}

.settings-actions {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.notif-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.btn-test {
  padding: 4px 12px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  border-radius: 5px;
  font-size: 12px;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.15s;
}

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

.btn-test.testing {
  color: var(--text-muted);
  pointer-events: none;
}

.btn-test.test-success {
  border-color: var(--success);
  color: var(--success);
}

.btn-test.test-fail {
  border-color: var(--danger);
  color: var(--danger);
}

.notif-service {
  margin-bottom: 14px;
  padding-left: 4px;
}

.notif-service-config {
  padding-left: 28px;
  margin-top: 8px;
}

/* Sidebar balance */
.sidebar-balance {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2px;
}

.sidebar-balance svg { flex-shrink: 0; }

/* Account tab */
.account-balance-card {
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 20px 24px;
  text-align: center;
}

.account-balance-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.account-balance-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
}

/* Active numbers list */
.active-numbers-list, .expiring-numbers-list {
  max-height: 300px;
  overflow-y: auto;
}

.number-info-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 6px;
  font-size: 13px;
}

.number-info-card-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.number-info-card-number {
  font-weight: 600;
  font-family: 'Consolas', 'Courier New', monospace;
}

.number-info-card-meta {
  font-size: 11px;
  color: var(--text-muted);
}

.number-info-card-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-locale {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

.badge-expiry-warn {
  background: rgba(231, 76, 60, 0.15);
  color: var(--danger);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

.badge-expiry-ok {
  background: rgba(46, 204, 113, 0.15);
  color: var(--success);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

/* Webhook */
.webhook-current {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  font-family: 'Consolas', 'Courier New', monospace;
  word-break: break-all;
}

/* Sidebar number expiry indicator */
.sidebar-number-expiry {
  font-size: 10px;
  color: var(--danger);
  font-weight: 500;
}

/* Toast notifications */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--success);
  color: #fff;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  z-index: 1000;
  animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.5s forwards;
}

.toast-error {
  background: var(--danger);
}

@keyframes slideIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

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

/* Help / About */
.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}

.about-app-info {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
}

.about-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
}

.about-app-info h3 {
  font-size: 20px;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.about-version {
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--bg-input);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: 'Consolas', 'Courier New', monospace;
}

.about-description {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.about-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.about-link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
  text-decoration: none;
  font-size: 14px;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: background 0.15s, border-color 0.15s;
}

.about-link:hover {
  background: var(--bg-input);
  border-color: var(--accent);
}

.about-link svg {
  flex-shrink: 0;
}

.about-update-section {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.about-update-status {
  font-size: 14px;
  color: var(--text-secondary);
}

.about-update-status.update-ok {
  color: var(--success);
}

.about-update-status.update-available {
  color: var(--accent);
}

.about-update-status.update-error {
  color: var(--danger);
}

.about-update-status a {
  color: var(--accent);
  text-decoration: none;
}

.about-update-status a:hover {
  text-decoration: underline;
}