/* Layout — One big card */

.app {
  display: flex;
  background: var(--color-surface);
  margin: var(--app-margin);
  margin-top: calc(var(--tg-header-offset) + var(--app-margin));
  border-radius: 28px;
  overflow: hidden;
  height: calc(100vh - var(--tg-header-offset) - var(--app-margin) * 2);
  border: 1px solid var(--color-border);
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  border-inline-end: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-header { padding: 24px 20px 16px; }

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--color-text);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
}

.logo-text {
  font-weight: 700;
  font-size: 17px;
}

/* Nav */
.sidebar-nav {
  flex: 1;
  padding: 4px 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  margin-bottom: 2px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 150ms ease;
  text-decoration: none;
}

.nav-item:hover {
  color: var(--color-text);
  background: var(--color-surface-alt);
}

.nav-item.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  font-weight: 600;
}

.nav-item svg { width: 20px; height: 20px; flex-shrink: 0; }

.nav-divider {
  height: 1px;
  background: var(--color-border-light);
  margin: 8px 16px;
}

.nav-section-label {
  padding: 16px 16px 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-tertiary);
}

/* Sidebar footer */
.sidebar-footer {
  padding: 8px;
  border-top: 1px solid var(--color-border-light);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
}

.sidebar-user:hover { background: var(--color-surface-alt); }

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 13px;
  overflow: hidden;
}

.user-avatar img { width: 100%; height: 100%; object-fit: cover; }
.user-info { overflow: hidden; }
.user-name { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-size: 12px; color: var(--color-text-tertiary); }

/* Content */
.content {
  flex: 1;
  overflow-y: auto;
  display: flex;
}

/* Mobile branded header — hidden on desktop */
.mobile-header {
  display: none;
}

.page {
  flex: 1;
  padding: 32px;
  overflow-y: auto;
}

/* AI Chat panel (right column) */
.chat-panel {
  width: 320px;
  flex-shrink: 0;
  border-inline-start: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

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

.chat-header-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.chat-header-info { flex: 1; }
.chat-header-name { font-size: 15px; font-weight: 600; }
.chat-header-status { font-size: 12px; color: var(--color-text-tertiary); }

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.5;
}

.chat-msg--ai {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border-light);
  align-self: flex-start;
}

.chat-msg--user {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  align-self: flex-end;
}

.chat-msg-time {
  font-size: 11px;
  color: var(--color-text-tertiary);
  margin-top: 4px;
}

.chat-input-area {
  padding: 12px 16px;
  border-top: 1px solid var(--color-border-light);
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.chat-input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-surface);
  outline: none;
  resize: none;
  max-height: 120px;
  line-height: 1.4;
}

.chat-input:focus { border-color: var(--color-primary); }
.chat-input::placeholder { color: var(--color-text-tertiary); }

.chat-send {
  width: 38px;
  height: 38px;
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.chat-send:hover { background: var(--color-primary-hover); }
.chat-send svg { width: 18px; height: 18px; }

/* Tab bar (mobile) */
.tabbar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--tabbar-height);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  z-index: 100;
}

.tabbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: 100%;
}

.tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 12px;
  color: var(--color-text-tertiary);
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

.tab-item.active { color: var(--color-primary); }
.tab-item svg { width: 22px; height: 22px; }

/* Mobile + small windows */
@media (max-width: 768px) {
  .app {
    margin: 0;
    border-radius: 0;
    border: none;
    height: 100vh;
    height: 100dvh;
  }
  .sidebar { display: none; }
  .chat-panel { display: none; }
  .content { padding-bottom: 52px; flex-direction: column; }
  .mobile-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 10px 12px;
    padding-top: calc(env(safe-area-inset-top, 0px) + 10px);
    border-bottom: 1px solid var(--color-border-light);
    flex-shrink: 0;
  }
  .mobile-header .logo-icon {
    width: 28px;
    height: 28px;
    font-size: 14px;
    border-radius: 8px;
  }
  .mobile-header .logo-text {
    font-size: 15px;
    font-weight: 700;
  }
  .tabbar { display: block; height: 52px; }
  .page { padding: 12px; }
}

/* Loading */
.loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: 24px;
}

.loading-logo {
  width: 64px;
  height: 64px;
  background: var(--color-text);
  color: var(--color-text-inverse);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: 700;
}

.loading-text {
  font-size: 13px;
  color: var(--color-text-tertiary);
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* Error */
.error-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: 16px;
  padding: 32px;
  text-align: center;
}

.error-icon { font-size: 48px; }
.error-title { font-size: 20px; font-weight: 700; }
.error-message { font-size: 15px; color: var(--color-text-secondary); max-width: 380px; }