/* ==================== 老李 × 小慌 游戏平台 - 基础样式 ==================== */
/* 响应式设计：支持手机、平板、电脑 */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

:root {
  /* 主题色 */
  --primary-color: #ff6b6b;
  --primary-dark: #e85555;
  --secondary-color: #4ecdc4;
  --accent-color: #ffe66d;

  /* 背景色 */
  --bg-dark: #1a1a2e;
  --bg-medium: #16213e;
  --bg-light: #0f3460;
  --bg-card: rgba(255, 255, 255, 0.08);
  --bg-card-hover: rgba(255, 255, 255, 0.15);

  /* 文字色 */
  --text-primary: #e8d5b7;
  --text-secondary: #b8a07e;
  --text-muted: #8a7a5a;

  /* 边框和阴影 */
  --border-color: rgba(255, 255, 255, 0.1);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 动画 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

html {
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-medium) 50%, var(--bg-light) 100%);
  min-height: 100vh;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ==================== 通用按钮 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 12px rgba(255, 107, 107, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 107, 107, 0.5);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn.loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid currentColor;
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.8s linear infinite;
}

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

/* ==================== 通用卡片 ==================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ==================== 通用模态框 ==================== */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.modal.show {
  display: flex;
  opacity: 1;
}

.modal-content {
  background: linear-gradient(135deg, var(--bg-medium), var(--bg-dark));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px;
  max-width: 480px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    transform: translateY(-20px) scale(0.95);
    opacity: 0;
  }
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.modal-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-color);
}

.modal-close {
  background: none;
  border: none;
  font-size: 28px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-primary);
}

/* ==================== 表单样式 ==================== */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 16px;
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.2);
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-error {
  color: var(--primary-color);
  font-size: 14px;
  margin-top: 6px;
}

/* ==================== 用户栏 ==================== */
.user-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 100;
}

.user-bar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-bar-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-color);
}

.user-bar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: white;
}

.user-name {
  font-weight: 500;
  color: var(--text-primary);
}

/* ==================== 响应式设计 ==================== */

/* 平板 */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .modal-content {
    padding: 24px;
    margin: 16px;
  }

  .btn {
    padding: 10px 20px;
  }
}

/* 手机 */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .user-bar {
    height: 56px;
    padding: 0 16px;
  }

  .modal-content {
    padding: 20px;
    border-radius: var(--radius-lg);
  }

  .modal-title {
    font-size: 20px;
  }

  .btn {
    padding: 10px 16px;
    font-size: 15px;
  }
}

/* 小屏手机 */
@media (max-width: 360px) {
  html {
    font-size: 13px;
  }
}

/* ==================== 工具类 ==================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { flex-direction: column; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }

.hidden { display: none !important; }
.visible { display: block; }

/* ==================== 动画 ==================== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.animate-fadeIn { animation: fadeIn 0.5s ease; }
.animate-slideUp { animation: slideUp 0.5s ease; }
.animate-pulse { animation: pulse 2s infinite; }
.animate-bounce { animation: bounce 1s infinite; }