/* ========================================
   Base Styles — Design System 2.0 Classic
   Fonts, Variables, Reset
   ======================================== */

/* ─── Font Imports ─────────────────────── */

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

@font-face {
  font-family: 'GenSenRounded';
  src: url('https://lab.helloruru.com/fonts/GenSenRounded-Regular.woff2') format('woff2');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'GenSenRounded';
  src: url('https://lab.helloruru.com/fonts/GenSenRounded-Medium.woff2') format('woff2');
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: 'GenSenRounded';
  src: url('https://lab.helloruru.com/fonts/GenSenRounded-Bold.woff2') format('woff2');
  font-weight: 700;
  font-display: swap;
}

/* ─── CSS Variables — DS 2.0 Classic ───── */

:root {
  --color-primary: #D4A5A5;
  --color-secondary: #B8A9C9;
  --color-primary-light: #E8B4B8;
  --color-primary-dark: #C9929A;
  --color-secondary-light: #C4B7D7;
  --color-secondary-dark: #9B7E93;
  --color-coral: #E8A87C;
  --color-gray-rose: #C9929A;
  --color-success: #A8B5A0;
  --color-blush: #F5D0C5;
  --color-sakura: #FEDFE1;
  --color-fuji: #C4B7D7;

  --color-bg: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-card-hover: #FDF8F7;
  --color-text: #333333;
  --color-text-body: #4A4A4A;
  --color-text-muted: #888888;
  --color-text-placeholder: #AAAAAA;
  --color-border: #E8E4E1;
  --color-border-disabled: #B5ADA7;

  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;

  --font-main: 'GenSenRounded', 'Noto Sans TC', sans-serif;
  --font-small: 'Noto Sans TC', sans-serif;

  /* 多層柔陰影（Josh Comeau 分層法，玫瑰色相） */
  --shadow-sm:
    0 1px 2px rgba(212,165,165,0.07),
    0 2px 4px rgba(212,165,165,0.07),
    0 4px 8px rgba(212,165,165,0.07);
  --shadow-md:
    0 2px 4px rgba(212,165,165,0.07),
    0 4px 8px rgba(212,165,165,0.07),
    0 8px 16px rgba(212,165,165,0.07),
    0 16px 32px rgba(212,165,165,0.07);
  --shadow-lg:
    0 4px 8px rgba(212,165,165,0.07),
    0 8px 16px rgba(212,165,165,0.07),
    0 16px 32px rgba(212,165,165,0.07),
    0 32px 64px rgba(212,165,165,0.07);

  --gradient-primary: linear-gradient(135deg, #D4A5A5, #B8A9C9);
  --transition: 0.18s ease-out;
}

/* ─── Dark Mode — DS 2.0 暖可可 ─────────── */

[data-theme="dark"] {
  --color-bg: #1E181B;
  --color-surface: #282224;
  --color-card-hover: #302A2C;
  --color-text: #EDE8E9;
  --color-text-body: #C8C0C2;
  --color-text-muted: #9E9496;
  --color-text-placeholder: #6B6466;
  --color-border: #3D3538;
  --color-border-disabled: #4D4548;

  /* 品牌色亮度 +10% */
  --color-primary: #DAAEB0;
  --color-secondary: #C2B4D0;
  --color-primary-light: #F2C9CD;
  --color-primary-dark: #D4A5A5;
  --color-secondary-light: #D9CDE8;
  --color-secondary-dark: #B8A9C9;
  --color-coral: #F0B88C;
  --color-gray-rose: #D4A0A4;

  /* 裝飾色調整 */
  --color-blush: #3D2F2F;
  --color-sakura: #3A2F3A;
  --color-fuji: #2F2F3A;
  --color-success: #4A5A4A;

  /* 多層深色陰影（深色底需更重） */
  --shadow-sm:
    0 1px 2px rgba(0,0,0,0.15),
    0 2px 4px rgba(0,0,0,0.15),
    0 4px 8px rgba(0,0,0,0.10);
  --shadow-md:
    0 2px 4px rgba(0,0,0,0.15),
    0 4px 8px rgba(0,0,0,0.10),
    0 8px 16px rgba(0,0,0,0.10),
    0 16px 32px rgba(0,0,0,0.08);
  --shadow-lg:
    0 4px 8px rgba(0,0,0,0.15),
    0 8px 16px rgba(0,0,0,0.10),
    0 16px 32px rgba(0,0,0,0.10),
    0 32px 64px rgba(0,0,0,0.08);

  --gradient-primary: linear-gradient(135deg, #DAAEB0, #C2B4D0);
}

/* ─── Reset ────────────────────────────── */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-weight: 500;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
}

/* ─── Reduced Motion ──────────────────── */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}