/* Layout */
#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  border-bottom: 1px solid var(--card-border);
  background: var(--card);
}

.site-header .logo {
  height: 28px;
}

.site-header nav {
  display: flex;
  gap: 8px;
}

.site-header .nav-link {
  padding: 8px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-input);
  transition: color 0.2s, background 0.2s;
}

.site-header .nav-link:hover,
.site-header .nav-link.active {
  color: var(--text);
  background: var(--input-bg);
}

.site-header .user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 13px;
}

/* Main content area */
.main-content {
  flex: 1;
  padding: 32px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* Page header */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

/* Login page */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.login-card .logo {
  height: 36px;
  margin-bottom: 32px;
}

.login-card h1 {
  margin-bottom: 8px;
  font-size: 18px;
}

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

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

.form-group label {
  display: block;
  margin-bottom: 6px;
}

.form-group .error-text {
  color: var(--error);
  font-size: 12px;
  margin-top: 4px;
}

.login-card .btn {
  width: 100%;
  margin-top: 8px;
}

/* Cards grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.game-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.game-card .card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.game-card .card-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 12px;
  font-family: var(--font-ui);
}

.game-card .card-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Stats row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-card .stat-value {
  font-family: var(--font-heading);
  font-size: 28px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card .stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Chat layout */
.chat-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  height: calc(100vh - 73px);
  max-width: none;
  margin: 0;
  padding: 0;
}

.chat-sidebar {
  border-right: 1px solid var(--card-border);
  background: var(--card);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chat-sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.chat-session-item {
  padding: 12px 16px;
  border-radius: var(--radius-input);
  cursor: pointer;
  transition: background 0.15s;
  margin-bottom: 4px;
}

.chat-session-item:hover {
  background: var(--input-bg);
}

.chat-session-item.active {
  background: var(--input-bg);
  border: 1px solid var(--card-border);
}

.chat-session-item .session-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-session-item .session-meta {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

.chat-main {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chat-toolbar {
  padding: 12px 20px;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card);
}

.chat-toolbar select {
  width: auto;
  min-width: 200px;
  padding: 8px 36px 8px 12px;
  font-size: 13px;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-message {
  max-width: 80%;
  padding: 14px 18px;
  border-radius: var(--radius-card);
  font-size: 14px;
  line-height: 1.6;
}

.chat-message.user {
  align-self: flex-end;
  background: var(--red);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.chat-message.assistant {
  align-self: flex-start;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-bottom-left-radius: 4px;
}

.chat-message.assistant pre {
  background: var(--input-bg);
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 8px 0;
  font-size: 13px;
}

.chat-message.assistant code {
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 13px;
}

.chat-message.assistant p { margin: 8px 0; }
.chat-message.assistant p:first-child { margin-top: 0; }
.chat-message.assistant p:last-child { margin-bottom: 0; }
.chat-message.assistant ul, .chat-message.assistant ol { margin: 8px 0; padding-left: 20px; }
.chat-message.assistant h1, .chat-message.assistant h2, .chat-message.assistant h3 {
  text-transform: none;
  letter-spacing: normal;
  margin: 12px 0 8px;
}
.chat-message.assistant h1 { font-size: 18px; }
.chat-message.assistant h2 { font-size: 16px; }
.chat-message.assistant h3 { font-size: 14px; }

.chat-input-area {
  padding: 16px 20px;
  border-top: 1px solid var(--card-border);
  background: var(--card);
  display: flex;
  gap: 12px;
  align-items: flex-end;
}

.chat-input-area textarea {
  flex: 1;
  resize: none;
  min-height: 44px;
  max-height: 200px;
  font-family: var(--font-body);
}

.chat-input-area .btn {
  flex-shrink: 0;
  height: 44px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal {
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal h2 {
  margin-bottom: 20px;
}

.modal .form-group:last-of-type {
  margin-bottom: 24px;
}

.modal .modal-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* Toast */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 14px 20px;
  border-radius: var(--radius-input);
  font-size: 13px;
  font-family: var(--font-ui);
  animation: slideIn 0.3s ease;
  min-width: 280px;
}

.toast-success { background: rgba(34,197,94,0.15); border: 1px solid rgba(34,197,94,0.3); color: #4ade80; }
.toast-error { background: rgba(255,107,111,0.15); border: 1px solid rgba(255,107,111,0.3); color: var(--error); }
.toast-info { background: rgba(46,15,228,0.15); border: 1px solid rgba(46,15,228,0.3); color: #818cf8; }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-state h3 {
  margin-bottom: 8px;
  color: var(--text);
  text-transform: none;
  letter-spacing: normal;
}

/* Loading */
.loading-center {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
}

/* File upload */
.file-upload {
  position: relative;
}

.file-upload input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* Responsive */
@media (max-width: 768px) {
  .chat-layout { grid-template-columns: 1fr; }
  .chat-sidebar { display: none; }
  .main-content { padding: 20px; }
  .cards-grid { grid-template-columns: 1fr; }
  .site-header { padding: 12px 16px; }
}