/* ==========================================================================
   tokens.css —— 设计变量基座 + 全局重置 + 质感底层
   所有颜色均来自 themeManager 写入的 CSS 变量，换领域即换肤。
   ========================================================================== */

:root {
  /* —— 默认（中性深色）兜底，JS 载入后会被领域主题覆盖 —— */
  --c-bg: #0b0f14;
  --c-bg-gradient: linear-gradient(180deg, #0b0f14 0%, #070a0e 100%);
  --c-surface: rgba(255, 255, 255, 0.045);
  --c-surface-strong: rgba(255, 255, 255, 0.075);
  --c-border: rgba(255, 255, 255, 0.10);
  --c-border-strong: rgba(255, 255, 255, 0.18);
  --c-text: #e8eef5;
  --c-text-soft: #9aa9b8;
  --c-text-faint: #63717f;
  --c-primary: #6ea8fe;
  --c-primary-soft: rgba(110, 168, 254, 0.16);
  --c-accent: #8fd6c0;
  --c-accent-soft: rgba(143, 214, 192, 0.14);
  --c-card-gradient: linear-gradient(160deg, rgba(255,255,255,0.07) 0%, rgba(255,255,255,0.025) 45%, rgba(255,255,255,0.045) 100%);
  --c-card-glow: rgba(110, 168, 254, 0.30);
  --c-card-sheen: linear-gradient(115deg, transparent 35%, rgba(255,255,255,0.13) 48%, transparent 62%);
  --c-success: #57d9a3;
  --c-danger: #ff7b7b;

  --c-primary-rgb: 110, 168, 254;
  --c-accent-rgb: 143, 214, 192;
  --c-card-glow-rgb: 110, 168, 254;
  --c-success-rgb: 87, 217, 163;
  --c-danger-rgb: 255, 123, 123;

  --font-display: 'Iowan Old Style', 'Palatino Linotype', 'Songti SC', Georgia, serif;
  --font-body: 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;

  --radius: 18px;
  --radius-sm: 11px;
  --radius-lg: 26px;

  --theme-intensity: 1;

  /* 尺度 */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;

  /* 阴影 */
  --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 10px 34px -12px rgba(0, 0, 0, 0.75), 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-lift: 0 26px 60px -18px rgba(0, 0, 0, 0.85), 0 6px 20px rgba(0, 0, 0, 0.5);
  --shadow-modal: 0 44px 120px -28px rgba(0, 0, 0, 0.95);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --z-base: 1;
  --z-sticky: 40;
  --z-modal: 100;
  --z-toast: 200;
}

/* ==========================================================================
   重置
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  color: var(--c-text);
  background-color: var(--c-bg);
  background-image: var(--c-bg-gradient);
  background-attachment: fixed;
  font-size: 15px;
  line-height: 1.65;
  letter-spacing: 0.008em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.5s var(--ease-out), color 0.5s var(--ease-out);
}

/* 主题切换时的整体过渡 */
body.theme-transitioning,
body.theme-transitioning * {
  transition: background-color 0.5s var(--ease-out),
              border-color 0.5s var(--ease-out),
              color 0.35s var(--ease-out),
              box-shadow 0.5s var(--ease-out) !important;
}

/* 背景的「颗粒 + 光晕」质感层：不参与交互，纯装饰 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: calc(0.05 * var(--theme-intensity));
  background-image:
    radial-gradient(rgba(255,255,255,0.9) 0.5px, transparent 0.5px),
    radial-gradient(rgba(255,255,255,0.5) 0.5px, transparent 0.5px);
  background-size: 3px 3px, 7px 7px;
  background-position: 0 0, 2px 3px;
  mix-blend-mode: overlay;
}

/* 顶部氛围光：随主题色变化，制造纵深 */
body::after {
  content: '';
  position: fixed;
  top: -38vh;
  left: 50%;
  transform: translateX(-50%);
  width: 130vw;
  height: 78vh;
  pointer-events: none;
  z-index: 0;
  opacity: calc(0.5 * var(--theme-intensity));
  background: radial-gradient(
    ellipse at center,
    rgba(var(--c-primary-rgb), 0.20) 0%,
    rgba(var(--c-accent-rgb), 0.08) 38%,
    transparent 68%
  );
  filter: blur(38px);
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.24;
}

p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

button {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
}

input, textarea, select {
  font: inherit;
  color: inherit;
}

a { color: var(--c-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

img, svg { display: block; max-width: 100%; }

/* ==========================================================================
   滚动条（桌面端质感细节）
   ========================================================================== */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(var(--c-primary-rgb), 0.35) transparent;
}
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: rgba(var(--c-primary-rgb), 0.28);
  border-radius: 99px;
  border: 2px solid transparent;
  background-clip: content-box;
}
*::-webkit-scrollbar-thumb:hover { background: rgba(var(--c-primary-rgb), 0.48); background-clip: content-box; }

/* ==========================================================================
   可访问性
   ========================================================================== */
:focus-visible {
  outline: 2px solid rgba(var(--c-accent-rgb), 0.85);
  outline-offset: 2px;
  border-radius: 6px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}