/* ========================================
   theme.css - 现代玻璃科技风聊天室主题系统
   亮暗双主题 | 磨砂玻璃质感 | 流畅微动画
   ======================================== */

/* ---------- 全局CSS变量 (亮主题·高级通透) ---------- */
:root {
  /* 主色调系统 */
  --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --accent-gold: #fbbf24;
  
  /* 亮主题专属 */
  --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  --container-bg: rgba(255, 255, 255, 0.7);
  --card-bg: rgba(255, 255, 255, 0.5);
  --border-color: rgba(148, 163, 184, 0.2);
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --shadow-sm: 0 8px 32px rgba(31, 38, 135, 0.08);
  --shadow-lg: 0 20px 40px rgba(31, 38, 135, 0.12);
  
  /* 玻璃通用属性 */
  --backdrop-blur: blur(16px);
  --border-radius-sm: 12px;
  --border-radius-md: 18px;
  --border-radius-lg: 24px;
  --border-radius-xl: 30px;
  
  /* 动画时长 */
  --transition-fast: 0.2s ease-out;
  --transition-base: 0.3s ease-out;
  --transition-slow: 0.4s ease-out;
  
  /* 网格纹理 */
  --grid-pattern: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 19px,
    rgba(99, 102, 241, 0.03) 19px,
    rgba(99, 102, 241, 0.03) 20px
  );
}

/* ---------- 暗主题·深邃科技 ---------- */
[data-theme="dark"] {
  --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
  --container-bg: rgba(15, 23, 42, 0.8);
  --card-bg: rgba(30, 27, 75, 0.6);
  --border-color: rgba(99, 102, 241, 0.15);
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --shadow-sm: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.4);
  --grid-pattern: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 19px,
    rgba(99, 102, 241, 0.08) 19px,
    rgba(99, 102, 241, 0.08) 20px
  );
}

/* 全局平滑过渡 */
*,
*::before,
*::after {
  transition: background-color var(--transition-slow),
              border-color var(--transition-base),
              color var(--transition-base),
              box-shadow var(--transition-base),
              background var(--transition-slow),
              backdrop-filter var(--transition-base);
  box-sizing: border-box;
}

/* ---------- 全局基础 ---------- */
body {
  font-family: 'Inter', -apple-system, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  margin: 0;
  min-height: 90vh;
  position: relative;
  animation: flowBg 20s ease infinite;
  background-size: 200% 200%;
}

@keyframes flowBg {
  0% { background-position: 0% 0%; }
  50% { background-position: 100% 100%; }
  100% { background-position: 0% 0%; }
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-light);
}

/* ---------- 认证容器 & 聊天容器 ---------- */
.auth-container,
.chat-container {
  backdrop-filter: var(--backdrop-blur);
  background: var(--container-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
}

.auth-container {
  max-width: 480px;
  margin: 10vh auto;
  padding: 2rem;
}

.chat-container {
  display: flex;
  flex-direction: column;
  height: 90vh;
  max-width: 1400px;
  margin: 2rem auto;
  overflow: hidden;
}

/* ========== 登录页面专用样式 (修复居中与错位) ========== */
.auth-page {
  text-align: center;
  width: 100%;
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.5px;
  margin-bottom: 0.5rem;
}

.auth-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.auth-content {
  max-width: 340px;
  margin: 0 auto;
  width: 100%;
}

.auth-content .form-group {
  margin-bottom: 1.25rem;
  text-align: left;
}

.auth-content .form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.auth-content .form-group input {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  outline: none;
}

.auth-content .form-group input:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  background: rgba(255, 255, 255, 0.25);
}

.auth-content .btn-primary {
  width: 100%;
  margin-top: 0.5rem;
  padding: 12px 0;
  background: var(--primary-gradient);
  border: none;
  border-radius: 40px;
  font-weight: 600;
  font-size: 1rem;
  color: white;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.auth-content .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(99, 102, 241, 0.4);
}

.auth-content .btn-primary:active {
  transform: scale(0.97);
}

/* 确保输入框容器不溢出 */
.auth-content .form-group,
.auth-content input,
.auth-content button {
  box-sizing: border-box;
}

/* ---------- 头部区域 ---------- */
.header {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}
.user-profile img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(99, 102, 241, 0.4);
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.2);
  transition: transform var(--transition-fast);
}
.user-profile img:hover {
  transform: scale(1.02);
}
.user-profile h1 {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.3px;
  margin: 0;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
#user-status {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.user-actions {
  display: flex;
  gap: 10px;
}
.user-actions button {
  background: rgba(255,255,255,0.1);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(4px);
  border-radius: 40px;
  width: 40px;
  height: 40px;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}
.user-actions button:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99,102,241,0.3);
  border-color: transparent;
}

/* ---------- 消息区域 (网格纹理) ---------- */
.message-area {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  background-image: var(--grid-pattern);
  background-size: 20px 20px;
  scroll-behavior: smooth;
}

/* 消息容器 & 气泡通用 */
.message {
  display: flex;
  margin-bottom: 20px;
  animation: messageSlideIn 0.3s ease-out forwards;
}

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

.message-text {
  max-width: 70%;
  padding: 12px 18px;
  font-size: 0.95rem;
  line-height: 1.45;
  word-wrap: break-word;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

/* 发送消息 (右侧) */
.message.sent {
  justify-content: flex-end;
}
.message.sent .message-text {
  background: var(--primary-gradient);
  color: white;
  border-radius: var(--border-radius-md) var(--border-radius-md) 5px var(--border-radius-md);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.2), var(--shadow-sm);
}

/* 接收消息 (左侧) */
.message.received {
  justify-content: flex-start;
}
.message.received .message-text {
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: var(--border-radius-md) var(--border-radius-md) var(--border-radius-md) 5px;
}

/* 消息悬停效果 */
.message-text:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.message-info {
  display: flex;
  gap: 10px;
  font-size: 0.7rem;
  margin-top: 5px;
  padding: 0 6px;
  color: var(--text-secondary);
}
.message.sent .message-info {
  justify-content: flex-end;
}

/* 系统消息 */
.message.system {
  justify-content: center;
}
.message.system .message-text {
  background: rgba(0,0,0,0.05);
  backdrop-filter: blur(4px);
  border-radius: 30px;
  font-size: 0.8rem;
  padding: 6px 16px;
  text-align: center;
  max-width: 80%;
  color: var(--text-secondary);
}

/* ---------- 输入区域 ---------- */
.input-area {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--border-color);
  padding: 16px 24px;
  display: flex;
  gap: 12px;
  align-items: center;
}

#msgInput {
  flex: 1;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
  border: 1px solid var(--border-color);
  border-radius: 40px;
  padding: 12px 20px;
  font-size: 0.95rem;
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-fast);
}
#msgInput:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  background: rgba(255, 255, 255, 0.3);
}

#sendButton {
  background: var(--primary-gradient);
  border: none;
  border-radius: 40px;
  padding: 10px 24px;
  font-weight: 600;
  color: white;
  display: flex;
  gap: 8px;
  align-items: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
#sendButton:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(99,102,241,0.4);
}
#sendButton:active {
  transform: scale(0.95);
}

/* ---------- 状态栏 ---------- */
.status-bar {
  display: flex;
  justify-content: space-between;
  padding: 8px 24px;
  font-size: 0.75rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  background: rgba(0,0,0,0.02);
}

/* ---------- 模式选择器 (右下角浮动) ---------- */
.mode-selector {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border-radius: 48px;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  z-index: 100;
  transition: all var(--transition-base);
}
.mode-selector span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
}
.mode-buttons {
  display: flex;
  gap: 8px;
}
.mode-btn {
  background: transparent;
  border: none;
  padding: 6px 14px;
  border-radius: 32px;
  font-size: 0.75rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  backdrop-filter: blur(2px);
}
.mode-btn.active {
  background: var(--primary-gradient);
  color: white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.mode-btn:hover:not(.active) {
  background: rgba(99, 102, 241, 0.2);
  transform: translateY(-1px);
}

/* ---------- 主题切换器 (右上角) ---------- */
.theme-selector {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border-radius: 48px;
  padding: 6px 12px;
  display: flex;
  gap: 6px;
  border: 1px solid var(--border-color);
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.theme-btn {
  background: transparent;
  border: none;
  padding: 6px 12px;
  border-radius: 32px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.theme-btn.active {
  background: var(--primary-gradient);
  color: white;
}
.theme-icon {
  font-size: 0.8rem;
}

/* ---------- 模态框玻璃重设计 ---------- */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(12px);
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal-content {
  background: var(--container-bg);
  backdrop-filter: blur(24px);
  border-radius: var(--border-radius-lg);
  max-width: 480px;
  width: 90%;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  animation: modalPop 0.25s ease-out;
}
@keyframes modalPop {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}
.modal-header {
  display: flex;
  justify-content: space-between;
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}
.modal-header h2 {
  font-size: 1.4rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.close-btn {
  background: transparent;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}
.close-btn:hover {
  color: #ef4444;
  transform: rotate(90deg);
}
.modal-body {
  padding: 1.5rem;
}
.form-group {
  margin-bottom: 1rem;
}
.form-group label {
  display: block;
  font-size: 0.8rem;
  margin-bottom: 6px;
  color: var(--text-secondary);
}
.form-group input {
  width: 100%;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  box-sizing: border-box;
}
.form-group input:focus {
  border-color: var(--primary-light);
  outline: none;
  box-shadow: 0 0 0 2px rgba(99,102,241,0.2);
}
.btn-primary {
  background: var(--primary-gradient);
  border: none;
  padding: 10px 0;
  width: 100%;
  border-radius: 40px;
  font-weight: 600;
  color: white;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: 8px;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(99,102,241,0.4);
}
.btn-danger {
  background: rgba(239, 68, 68, 0.9);
  border: none;
  padding: 10px 0;
  width: 100%;
  border-radius: 40px;
  font-weight: 500;
  color: white;
  cursor: pointer;
  margin-top: 12px;
  transition: all var(--transition-fast);
}
.btn-danger:hover {
  background: #ef4444;
  transform: translateY(-1px);
}
.warning-box {
  background: rgba(245, 158, 11, 0.1);
  border-left: 3px solid #f59e0b;
  padding: 12px;
  border-radius: 12px;
  margin-bottom: 20px;
}
.avatar-upload {
  text-align: center;
  margin-bottom: 20px;
}
.avatar-upload img {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 3px solid var(--primary-light);
  margin-bottom: 12px;
  object-fit: cover;
}
.password-container {
  display: flex;
  gap: 8px;
}
.toggle-password {
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 40px;
  padding: 0 12px;
  cursor: pointer;
}

/* ---------- 额外按钮&加载动画 ---------- */
.loader {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-color);
  border-top: 2px solid var(--primary-light);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 三个跳动的点 (用于加载指示) */
.typing-dots {
  display: flex;
  gap: 6px;
  align-items: center;
}
.typing-dots span {
  width: 6px;
  height: 6px;
  background: var(--primary-light);
  border-radius: 50%;
  animation: dotPulse 1.2s infinite ease-in-out;
}
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes dotPulse {
  0%, 60%, 100% { transform: scale(0.6); opacity: 0.4; }
  30% { transform: scale(1.2); opacity: 1; }
}

/* ---------- 移动端适配 ---------- */
@media (max-width: 768px) {
  .chat-container {
    margin: 0;
    height: 100vh;
    border-radius: 0;
  }
  .message-text {
    max-width: 85%;
  }
  .mode-selector, .theme-selector {
    transform: scale(0.85);
    transform-origin: bottom right;
  }
  .mode-selector {
    bottom: 80px;
  }
  .input-area {
    padding: 12px;
  }
  #sendButton {
    padding: 8px 16px;
  }
  .auth-container {
    margin: 5vh auto;
    width: 90%;
    padding: 1.5rem;
  }
  .auth-content {
    max-width: 100%;
  }
}

/* ========= 统一设置面板（拟态玻璃风格） ========= */
.settings-modal-content {
    max-width: 450px;
    width: 90%;
}

.settings-body {
    padding: 1.5rem;
}

.settings-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}
.settings-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.settings-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.settings-title i {
    color: var(--primary-light);
}

.settings-options {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.settings-option-btn {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    border: 1px solid var(--border-color);
    border-radius: 40px;
    padding: 8px 20px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.settings-option-btn i {
    font-size: 0.9rem;
}

.settings-option-btn.active {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
    box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}

.settings-option-btn:hover:not(.active) {
    background: rgba(99, 102, 241, 0.2);
    transform: translateY(-1px);
}

.settings-hint {
    margin-top: 12px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-align: center;
}

#current-mode-display {
    font-weight: 600;
    color: var(--primary-light);
}

/* 调整原有模态框关闭按钮不影响新面板 */
.modal .close-btn {
    background: transparent;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

/* 强制修正：明亮主题下，所有设置面板按钮（非激活状态）的文字为深色，背景半透明深色 */
:root .settings-option-btn:not(.active),
[data-theme="light"] .settings-option-btn:not(.active) {
    background: rgba(0, 0, 0, 0.1) !important;
    border: 1px solid rgba(0, 0, 0, 0.25) !important;
    color: #1e293b !important;   /* 深灰文字，清晰可见 */
}

/* 暗色主题下，非激活按钮文字为浅色，背景半透白 */
[data-theme="dark"] .settings-option-btn:not(.active) {
    background: rgba(255, 255, 255, 0.1) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    color: #e2e8f0 !important;
}

/* 激活按钮保持渐变背景和白字（不受影响） */
.settings-option-btn.active {
    background: var(--primary-gradient) !important;
    color: white !important;
    border-color: transparent !important;
}

/* 悬停效果统一 */
.settings-option-btn:hover:not(.active) {
    background: var(--primary-light) !important;
    color: white !important;
    border-color: transparent !important;
}

/* 动态生成的spinner容器 */
.dynamic-spinner {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 8px;
}

/* 加载遮罩（覆盖整个聊天区域） */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
    border-radius: var(--border-radius-md);
    color: white;
    font-size: 0.9rem;
    gap: 12px;
}

.loading-overlay .loader {
    width: 40px;
    height: 40px;
    border-width: 3px;
}

/* 按钮禁用样式 */
button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}