/* ================================================================
   鲲鹏 Kunpeng — Page-Specific Styles
   ================================================================ */

/* ===== Section Pages (独立功能页) ===== */
.section-page {
  padding-top: var(--nav-height);
  min-height: 100vh;
}

/* ===== Chat Page ===== */
.chat-page {
  display: flex;
  height: calc(100vh - var(--nav-height));
  margin-top: var(--nav-height);
  overflow: hidden;
}

.chat-sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.chat-sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

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

.chat-session-item {
  display: flex;
  align-items: center;
  padding: 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--duration-fast);
  margin-bottom: 2px;
}

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

.chat-session-item.active {
  background: var(--cyan-dim);
  border: 1px solid var(--cyan-glow);
}

.chat-session-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.chat-session-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-session-time {
  font-size: 11px;
  color: var(--text-dim);
}

.chat-session-del {
  opacity: 0;
  padding: 4px;
  color: var(--text-dim);
  border-radius: 4px;
  transition: all var(--duration-fast);
}

.chat-session-item:hover .chat-session-del { opacity: 1; }
.chat-session-del:hover { color: var(--danger); background: rgba(255,92,92,.1); }

.chat-sidebar-footer {
  padding: 12px;
  border-top: 1px solid var(--border);
}

/* Chat Main */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.chat-topbar {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(0,152,240,.03) 0%, transparent 70%),
    var(--deep-sea);
}

.chat-message {
  display: flex;
  gap: 12px;
  max-width: 720px;
  animation: msgIn .3s var(--ease-out);
}

@keyframes msgIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.chat-message.assistant {
  align-self: flex-start;
}

.chat-message-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.chat-message.user .chat-message-avatar {
  background: var(--cyan-dim);
  border-color: var(--cyan-glow);
}

.chat-message.assistant .chat-message-avatar {
  background: var(--blue-dim);
  border-color: rgba(0,152,240,.25);
}

.chat-message-body {
  max-width: 85%;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.chat-message-content {
  padding: 14px 18px;
  border-radius: var(--radius-lg);
  font-size: 14px;
  line-height: 1.7;
}

.chat-message.user .chat-message-content {
  background: linear-gradient(135deg, rgba(0,212,170,.2), rgba(0,152,240,.15));
  border: 1px solid rgba(0,212,170,.2);
  border-bottom-right-radius: 4px;
}

.chat-message.assistant .chat-message-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.chat-message-content strong {
  color: var(--text-main);
  font-weight: 700;
}

.chat-message-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  color: var(--text-dim);
  padding: 0 4px;
}

.chat-copy-btn {
  font-size: 11px;
  color: var(--text-dim);
  padding: 2px 8px;
  border-radius: 3px;
  transition: all var(--duration-fast);
}

.chat-copy-btn:hover { color: var(--cyan); background: var(--cyan-dim); }

/* Typing indicator */
.chat-typing {
  display: flex;
  gap: 4px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: 4px;
}

.chat-typing span {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
  animation: typing 1.4s infinite ease-in-out;
}

.chat-typing span:nth-child(1) { animation-delay: 0s; }
.chat-typing span:nth-child(2) { animation-delay: .2s; }
.chat-typing span:nth-child(3) { animation-delay: .4s; }

@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); opacity: .4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* Chat Welcome */
.chat-welcome {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 24px;
  gap: 16px;
}

.chat-welcome-icon { font-size: 64px; }
.chat-welcome h2 { font-size: 24px; font-weight: 700; }
.chat-welcome p { color: var(--text-sec); font-size: 15px; }

.chat-welcome-caps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 8px;
  max-width: 400px;
}

.welcome-cap {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-sec);
}

.welcome-cap-icon { font-size: 18px; }

/* Chat Input */
.chat-input-area {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.chat-input-box {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  padding: 10px 10px 10px 18px;
  background: var(--deep-sea);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  transition: border-color var(--duration);
}

.chat-input-box:focus-within {
  border-color: var(--cyan);
  background: var(--mid-water);
  box-shadow: 0 0 0 3px var(--cyan-dim);
}

.chat-input-box textarea {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-size: 15px;
  color: var(--text-main);
  resize: none;
  max-height: 150px;
  line-height: 1.6;
}

.chat-input-box textarea::placeholder { color: var(--text-dim); }

.chat-send-btn {
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient);
  border-radius: var(--radius-md);
  color: #fff;
  flex-shrink: 0;
  transition: opacity var(--duration-fast);
}

.chat-send-btn:hover:not(:disabled) { opacity: .9; }
.chat-send-btn:disabled { opacity: .4; cursor: not-allowed; }

.chat-send-spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
}

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

/* Mobile chat */
@media (max-width: 768px) {
  .chat-sidebar {
    position: fixed;
    left: 0; top: var(--nav-height);
    bottom: 0;
    z-index: 50;
    transform: translateX(-100%);
    transition: transform var(--duration) var(--ease-out);
  }

  .chat-sidebar.open { transform: translateX(0); }

  .chat-topbar { display: flex; }

  .chat-messages { padding: 16px; }

  .chat-message { max-width: 100%; }

  .chat-message-body { max-width: 90%; }

  .chat-welcome-caps { grid-template-columns: 1fr; }

  .chat-input-area { padding: 12px 16px; }
}

/* ===== Guide Page ===== */
.guide-page {
  display: flex;
  min-height: calc(100vh - var(--nav-height));
  margin-top: var(--nav-height);
}

.guide-sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 24px 0;
  position: sticky;
  top: var(--nav-height);
  height: calc(100vh - var(--nav-height));
  overflow-y: auto;
}

.guide-sidebar-title {
  font-size: 16px;
  font-weight: 700;
  padding: 0 20px 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.guide-sidebar-search {
  padding: 0 16px 12px;
}

.guide-sidebar-search input {
  width: 100%;
  padding: 8px 12px;
  background: var(--deep-sea);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-main);
}

.guide-sidebar-search input::placeholder { color: var(--text-dim); }
.guide-sidebar-search input:focus { border-color: var(--cyan); }

.guide-nav-category {
  padding: 12px 20px 4px;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.guide-nav-item {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--text-sec);
  border-left: 2px solid transparent;
  transition: all var(--duration-fast);
}

.guide-nav-item:hover {
  color: var(--text-main);
  background: var(--hover);
}

.guide-nav-item.active {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--cyan-dim);
}

.guide-content {
  flex: 1;
  padding: 48px 56px;
  max-width: 820px;
  min-width: 0;
}

.guide-content h2 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 20px;
}

.guide-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin: 28px 0 12px;
}

.guide-content p {
  font-size: 15px;
  color: var(--text-sec);
  line-height: 1.8;
  margin-bottom: 12px;
}

.guide-content ul, .guide-content ol {
  margin: 8px 0 16px 20px;
  font-size: 15px;
  color: var(--text-sec);
  line-height: 2;
}

.guide-content ul { list-style: disc; }
.guide-content ol { list-style: decimal; }

.guide-content li::marker { color: var(--cyan); }

.guide-content strong { color: var(--text-main); font-weight: 700; }

.guide-nav-bottom {
  display: flex;
  justify-content: space-between;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

@media (max-width: 768px) {
  .guide-sidebar {
    position: fixed;
    left: 0;
    z-index: 50;
    transform: translateX(-100%);
    transition: transform var(--duration) var(--ease-out);
  }

  .guide-sidebar.open { transform: translateX(0); }

  .guide-content { padding: 32px 20px; }
}

/* ===== Auth Pages (Login/Register) ===== */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(ellipse 60% 50% at 50% 100%, rgba(0,212,170,.04) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 50% 30%, rgba(0,152,240,.03) 0%, transparent 70%),
    var(--deep-sea);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
}

.auth-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 32px;
}

.auth-logo .logo-text {
  font-size: 24px;
  font-weight: 800;
  color: transparent;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
}

.auth-title {
  text-align: center;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.auth-subtitle {
  text-align: center;
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 28px;
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}

.auth-field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-sec);
}

.auth-field input {
  padding: 12px 16px;
  background: var(--deep-sea);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--text-main);
  transition: border-color var(--duration);
}

.auth-field input:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-dim);
}

.auth-field input::placeholder { color: var(--text-dim); }

.auth-submit {
  width: 100%;
  padding: 14px;
  margin-top: 8px;
  background: var(--gradient);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: opacity var(--duration-fast);
}

.auth-submit:hover { opacity: .9; }
.auth-submit:disabled { opacity: .5; cursor: not-allowed; }

.auth-alt {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: var(--text-dim);
}

.auth-alt a { color: var(--cyan); font-weight: 500; }
.auth-alt a:hover { text-decoration: underline; }

.auth-error {
  padding: 10px 14px;
  background: rgba(255,92,92,.1);
  border: 1px solid rgba(255,92,92,.25);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--danger);
  margin-bottom: 16px;
}

/* ===== Admin Panel ===== */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 240px;
  min-width: 240px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
}

.admin-sidebar-brand {
  padding: 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.admin-sidebar-brand .logo-text {
  font-size: 18px;
  font-weight: 800;
}

.admin-sidebar-nav {
  flex: 1;
  padding: 12px 8px;
  overflow-y: auto;
}

.admin-nav-section {
  padding: 8px 12px 4px;
  font-size: 10px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.admin-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--text-sec);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast);
  margin-bottom: 2px;
}

.admin-nav-item:hover {
  color: var(--text-main);
  background: var(--hover);
}

.admin-nav-item.active {
  color: var(--cyan);
  background: var(--cyan-dim);
}

.admin-nav-icon { font-size: 16px; width: 20px; text-align: center; }

.admin-sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-dim);
}

.admin-main {
  margin-left: 240px;
  flex: 1;
  min-height: 100vh;
  background: var(--deep-sea);
}

.admin-main.full { margin-left: 0; }

.admin-topbar {
  padding: 16px 32px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.admin-topbar h2 {
  font-size: 18px;
  font-weight: 700;
}

.admin-topbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.admin-content {
  padding: 32px;
}

/* Admin stat cards */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.stat-card-label {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 8px;
}

.stat-card-value {
  font-size: 32px;
  font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-card-sub {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 4px;
}

/* Admin page header */
.admin-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.admin-page-header h3 {
  font-size: 20px;
  font-weight: 700;
}

/* Form styles for admin */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-sec);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  background: var(--deep-sea);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-main);
  transition: border-color var(--duration);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-dim);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

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

/* Inline editor */
.inline-editor {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.inline-editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.inline-editor-header h4 {
  font-size: 16px;
  font-weight: 700;
}

/* Toggle switch */
.toggle {
  width: 44px; height: 24px;
  border-radius: 12px;
  background: var(--border);
  position: relative;
  cursor: pointer;
  transition: background var(--duration);
}

.toggle.on {
  background: var(--gradient);
}

.toggle::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #fff;
  transition: transform var(--duration);
}

.toggle.on::after {
  transform: translateX(20px);
}

/* Table wrapper */
.table-wrapper {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  gap: 16px;
}

.table-toolbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.table-toolbar select,
.table-toolbar input {
  padding: 8px 12px;
  background: var(--deep-sea);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-main);
}

.table-toolbar select:focus,
.table-toolbar input:focus {
  border-color: var(--cyan);
}

/* Responsive admin */
@media (max-width: 900px) {
  .admin-sidebar {
    transform: translateX(-100%);
    transition: transform var(--duration) var(--ease-out);
  }

  .admin-sidebar.open { transform: translateX(0); }

  .admin-main { margin-left: 0; }

  .admin-content { padding: 20px 16px; }

  .admin-topbar { padding: 12px 16px; }

  .stat-cards { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .stat-cards { grid-template-columns: 1fr; }
}