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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-gradient);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-heading);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-primary-dark);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

input {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

code, .mono {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono",
    "Courier New", monospace;
}

/* === Custom Properties (CSS Variables) === */
:root {
  /* Primary palette */
  --color-primary: #C77DA0;
  --color-primary-light: #E8A0BF;
  --color-primary-dark: #A05E80;
  --color-primary-bg: #FFF5F9;

  /* Accent */
  --color-accent: #FFD700;
  --color-accent-light: #FFED80;

  /* Background */
  --bg-body: #FFF8FB;
  --bg-gradient: linear-gradient(135deg, #FFF5F9 0%, #FEF0F5 50%, #FFF0F8 100%);
  --bg-card: #FFFFFF;
  --bg-card-hover: #FFFAFD;
  --bg-surface: #FFFFFF;
  --bg-overlay: rgba(0, 0, 0, 0.5);

  /* Text */
  --text-primary: #3D2B35;
  --text-secondary: #7A6572;
  --text-muted: #A8949E;
  --text-heading: #2D1F27;
  --text-inverse: #FFFFFF;

  /* Borders */
  --border-light: rgba(200, 125, 160, 0.15);
  --border-medium: rgba(200, 125, 160, 0.25);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(200, 125, 160, 0.08);
  --shadow-md: 0 4px 12px rgba(200, 125, 160, 0.12);
  --shadow-lg: 0 8px 30px rgba(200, 125, 160, 0.18);
  --shadow-xl: 0 16px 50px rgba(200, 125, 160, 0.25);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
}

/* === Scrollbar === */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

/* === Selection === */
::selection {
  background: var(--color-primary-light);
  color: var(--text-inverse);
}