:root {
  --bg-primary: #0f141c;
  --bg-secondary: #171e29;
  --bg-card: #1c2534;
  --bg-input: #121822;
  --border-color: #2b3648;
  --accent-color: #3b82f6;
  --accent-hover: #2563eb;
  --ig-gradient: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-family);
  min-height: 100vh;
  padding: 24px;
  line-height: 1.5;
}

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

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-icon {
  font-size: 32px;
  background: var(--ig-gradient);
  padding: 8px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(220, 39, 67, 0.3);
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.server-status-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #f59e0b;
}

.status-online .status-dot {
  background-color: var(--success-color);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

/* Grid Layout */
.grid-layout {
  display: grid;
  grid-template-columns: 440px 1fr;
  gap: 24px;
}

@media (max-width: 1024px) {
  .grid-layout {
    grid-template-columns: 1fr;
  }
}

/* Cards */
.card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.02);
}

.card-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.card-body {
  padding: 20px;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Connection Info */
.ip-display-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0;
}

.ip-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-card);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.ip-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.ip-val-copy {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ip-val-copy code {
  color: #60a5fa;
  font-family: monospace;
  font-size: 0.95rem;
  font-weight: 600;
}

.btn-copy {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

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

.tip-banner {
  background-color: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  padding: 12px 14px;
  border-radius: var(--radius-md);
  font-size: 0.825rem;
  color: #93c5fd;
  line-height: 1.4;
}

/* Auth Widget */
.user-profile-widget {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px;
  background-color: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.profile-pic {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent-color);
}

.profile-fullname {
  font-weight: 600;
  font-size: 1.05rem;
}

.profile-username {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 4px;
}

.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success {
  background-color: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* Tabs */
.tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 8px 12px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.tab-btn.active {
  background: var(--bg-card);
  color: #fff;
  font-weight: 600;
}

.tab-content {
  display: none;
}

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

.tab-help {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.step-list {
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-left: 20px;
  margin-bottom: 16px;
}

.step-list li {
  margin-bottom: 6px;
}

.step-list a {
  color: #60a5fa;
  text-decoration: none;
}

kbd {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 0.75rem;
}

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 6px;
  color: var(--text-muted);
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--accent-hover);
}

.btn-danger {
  background-color: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

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

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

.btn-outline:hover {
  background: var(--bg-card);
  color: var(--text-main);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.alert {
  padding: 12px 14px;
  border-radius: var(--radius-md);
  margin-top: 14px;
  font-size: 0.85rem;
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
}

/* DM Card */
.dm-card {
  height: 720px;
  display: flex;
  flex-direction: column;
}

.dm-body {
  display: grid;
  grid-template-columns: 320px 1fr;
  padding: 0;
  flex: 1;
  overflow: hidden;
}

.inbox-pane {
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  background-color: rgba(0, 0, 0, 0.1);
}

.inbox-list {
  display: flex;
  flex-direction: column;
}

.inbox-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  cursor: pointer;
  transition: background-color 0.2s;
}

.inbox-item:hover {
  background-color: rgba(255, 255, 255, 0.03);
}

.inbox-item.active {
  background-color: rgba(59, 130, 246, 0.15);
  border-left: 3px solid var(--accent-color);
}

.inbox-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--bg-card);
}

.inbox-meta {
  flex: 1;
  min-width: 0;
}

.inbox-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.inbox-title {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.inbox-time {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.inbox-snippet {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Chat Pane */
.chat-pane {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chat-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.02);
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-back-chat {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 1rem;
  cursor: pointer;
}

.chat-title {
  font-weight: 600;
  font-size: 1rem;
}

.chat-subtitle {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.msg-row {
  display: flex;
  flex-direction: column;
  max-width: 75%;
}

.msg-row.sent {
  align-self: flex-end;
  align-items: flex-end;
}

.msg-row.received {
  align-self: flex-start;
  align-items: flex-start;
}

.msg-sender-name {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 4px;
  margin-left: 6px;
}

.msg-bubble {
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 0.9rem;
  line-height: 1.4;
  word-break: break-word;
}

.msg-row.sent .msg-bubble {
  background-color: #2563eb;
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg-row.received .msg-bubble {
  background-color: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-bottom-left-radius: 4px;
}

.msg-image {
  max-width: 240px;
  border-radius: 10px;
  margin-top: 4px;
  cursor: pointer;
}

.msg-time {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 4px;
  margin-right: 6px;
  margin-left: 6px;
}

.chat-input-bar {
  display: flex;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.02);
}

.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-dim);
  font-size: 0.9rem;
  text-align: center;
  padding: 20px;
}

.hidden {
  display: none !important;
}

.mt-3 {
  margin-top: 14px;
}