/* ================================================
   喵橘 Miaobibi — Brand Design Tokens
   Inspired by 爱发电 clean card layout, original UI
   Mobile-first, responsive, minimal
   ================================================ */

:root {
  /* ---- Color System ---- */
  --color-background: #FFFFFF;
  --color-surface: #FFFFFF;
  --color-surface-elevated: #FFFFFF;
  --color-surface-dim: #F8F8F8;
  --color-border: #E8E8E8;
  --color-border-subtle: #F0F0F0;

  /* Primary — Warm Orange */
  --color-primary: #FF9933;
  --color-primary-hover: #E88A2D;
  --color-primary-light: #FFF3E6;
  --color-primary-ghost: rgba(255, 153, 51, 0.08);

  /* Secondary — Sky Blue */
  --color-secondary: #87CEEB;
  --color-secondary-hover: #6FC0E0;
  --color-secondary-light: #E8F5FB;
  --color-secondary-ghost: rgba(135, 206, 235, 0.08);

  /* Text */
  --color-text: #222222;
  --color-text-secondary: #666666;
  --color-text-tertiary: #999999;
  --color-text-inverse: #FFFFFF;

  /* ---- Typography ---- */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --font-size-xs: 0.75rem;     /* 12px */
  --font-size-sm: 0.8125rem;   /* 13px */
  --font-size-base: 0.9375rem; /* 15px — mobile-friendly body */
  --font-size-lg: 1.0625rem;   /* 17px */
  --font-size-xl: 1.25rem;     /* 20px */
  --font-size-2xl: 1.5rem;     /* 24px */
  --font-size-3xl: 1.875rem;   /* 30px */
  --font-size-4xl: 2.25rem;    /* 36px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.3;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.65;

  /* ---- Spacing ---- */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* ---- Radius ---- */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* ---- Shadows (border-first, minimal shadow) ---- */
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-float: 0 8px 24px rgba(0, 0, 0, 0.08);

  /* ---- Transitions ---- */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;

  /* ---- Container ---- */
  --container-max: 1200px;
  --container-padding: 16px;
}

/* Desktop overrides */
@media (min-width: 768px) {
  :root {
    --font-size-base: 0.9375rem; /* 15px */
    --container-padding: 24px;
  }
}

@media (min-width: 1024px) {
  :root {
    --font-size-base: 1rem; /* 16px */
    --container-padding: 32px;
  }
}

/* ---- Typography Classes ---- */
.miaobibi-body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.miaobibi-h1 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

.miaobibi-h2 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

.miaobibi-h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

.miaobibi-caption {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  line-height: var(--line-height-normal);
}