/* ==========================================
   小红书风格 - 全局样式系统
   ========================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

:root {
  /* 小红书品牌色系 */
  --primary: #ff2442;
  --primary-light: #ff6b81;
  --primary-dark: #d91a37;
  --primary-gradient: linear-gradient(135deg, #ff2442, #ff6b81, #ff8a9e);
  --primary-glow: 0 4px 20px rgba(255, 36, 66, 0.3);

  /* 暖色调配色 */
  --warm-pink: #fff0f3;
  --warm-peach: #fff5f0;
  --warm-lavender: #f8f0ff;
  --warm-gold: #fff8e6;

  /* 中性色 */
  --bg: #fafafa;
  --bg-card: #ffffff;
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --text-muted: #999999;
  --border: #f0f0f0;
  --border-hover: #e0e0e0;

  /* 功能色 */
  --success: #52c41a;
  --success-bg: #f6ffed;
  --warning: #faad14;
  --warning-bg: #fffbe6;
  --error: #ff4d4f;
  --error-bg: #fff2f0;
  --info: #1890ff;
  --info-bg: #e6f7ff;

  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.15);

  /* 过渡 */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
  --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-primary);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
}

/* ==========================================
   通用组件
   ========================================== */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius-full);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  outline: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(255, 36, 66, 0.4);
}

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

.btn-secondary {
  background: white;
  color: var(--primary);
  border: 1.5px solid var(--primary-light);
}

.btn-secondary:hover {
  background: var(--warm-pink);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 6px 16px;
  font-size: 12px;
}

.btn-lg {
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 600;
}

.btn-block {
  width: 100%;
}

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

/* 卡片 */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-lg);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-glass {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.6);
}

/* 表单 */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.form-input,
.form-select {
  width: 100%;
  padding: 10px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 14px;
  color: var(--text-primary);
  background: white;
  transition: var(--transition);
  outline: none;
}

.form-input:focus,
.form-select:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(255, 36, 66, 0.1);
}

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

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
}

.tag-success {
  background: var(--success-bg);
  color: var(--success);
}

.tag-warning {
  background: var(--warning-bg);
  color: var(--warning);
}

.tag-error {
  background: var(--error-bg);
  color: var(--error);
}

.tag-info {
  background: var(--info-bg);
  color: var(--info);
}

/* 动画 */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

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

@keyframes sparkle {
  0%, 100% { opacity: 0; transform: scale(0) rotate(0deg); }
  50% { opacity: 1; transform: scale(1) rotate(180deg); }
}

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

.animate-fade-in {
  animation: fadeIn 0.5s ease forwards;
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

/* Toast 通知 */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: white;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  animation: slideInRight 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  max-width: 320px;
}

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

.toast-success { border-left: 3px solid var(--success); }
.toast-error { border-left: 3px solid var(--error); }
.toast-info { border-left: 3px solid var(--info); }

/* 加载动画 */
.loading-dots {
  display: flex;
  gap: 6px;
  align-items: center;
  justify-content: center;
}

.loading-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  animation: dotBounce 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dotBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.5; }
  40% { transform: scale(1); opacity: 1; }
}

/* 响应式 */
@media (max-width: 768px) {
  :root {
    --space-lg: 16px;
    --space-xl: 24px;
    --space-2xl: 32px;
  }

  .btn-lg {
    padding: 12px 28px;
    font-size: 15px;
  }
}