/* ============================================================
   base.css — 护妍 v4.0 「L'Atelier」 · 基础层
   实心象牙底 · 发丝线秩序 · 排印优先
   ============================================================ */

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

html {
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  cursor: default;
}

body {
  background-color: var(--bg-app);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  cursor: default;
}

::selection {
  background: var(--gold);
  color: var(--on-ink);
}

/* ---------- 滚动条 · 细金 ---------- */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gold-line); border-radius: var(--r-pill); }
::-webkit-scrollbar-thumb:hover { background: var(--gold); }

/* ---------- 排印 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-heading);
}

p { color: var(--ink-2); line-height: var(--lh-body); }

a {
  color: var(--ink);
  text-decoration: none;
  cursor: pointer;
  transition: color var(--dur-micro) var(--ease-soft);
}
a:hover { color: var(--gold-deep); }

code, pre, .mono { font-family: var(--font-mono); }

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

[hidden] { display: none !important; }

button, input, textarea, select {
  font: inherit;
  color: inherit;
  border: none;
  background: transparent;
}
button { cursor: pointer; user-select: none; }
select, label, summary { cursor: pointer; }

/* ---------- 大写宽字距标签（图标的排印替代物） ---------- */
.u-label {
  font-family: var(--font-body);
  font-size: var(--fs-2xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--ls-caps);
  color: var(--ink-3);
}

/* ---------- 键位提示 ---------- */
.c-kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 2px 6px;
  background: var(--bg-card);
}

/* ---------- 工具类 ---------- */
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

/* ---------- 全局颗粒质感 ---------- */
.u-grain {
  position: fixed;
  inset: 0;
  z-index: var(--z-grain);
  pointer-events: none;
  background-image: var(--grain-tex);
  background-size: 240px 240px;
  opacity: var(--grain-opacity);
  mix-blend-mode: multiply;
}

/* ---------- 焦点无障碍 ---------- */
:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- 打印 ---------- */
@media print {
  body { background: #fff !important; color: #000 !important; }
  .u-nav-wrap, .c-dock, .u-grain, .u-scroll-progress, .c-cmd-modal { display: none !important; }
  .c-card { border: 1px solid #ddd !important; box-shadow: none !important; background: #fff !important; break-inside: avoid; }
  .v-view { display: block !important; opacity: 1 !important; }
}

/* ---------- 鼠标跟随光标体系 (Mouse Stalker · 放大镜 + 动态字符药丸) ---------- */
.mouse-stalker {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  z-index: var(--z-cursor, 2200);
  pointer-events: none;
  mix-blend-mode: normal;
  opacity: 0;
  will-change: transform;
  transition: opacity 0.18s ease;
}

.mouse-stalker.is-on {
  opacity: 1;
}

/* 常规状态：精致迷你放大镜（中心精确对齐指针 12px, 12px） */
.mouse-stalker__lens {
  position: absolute;
  top: 0;
  left: 0;
  width: 28px;
  height: 28px;
  transform: translate(-12px, -12px) scale(1);
  transform-origin: 12px 12px;
  color: var(--ink);
  filter: drop-shadow(0 2px 7px rgba(22, 18, 12, 0.24));
  transition:
    transform 0.22s cubic-bezier(0.2, 0.8, 0.2, 1),
    opacity 0.18s ease;
  opacity: 1;
  pointer-events: none;
  display: block;
}

.mouse-stalker__lens svg {
  width: 28px;
  height: 28px;
  display: block;
}

/* 悬停交互时：平滑展开为高定字符药丸徽标 */
.mouse-stalker__dot {
  position: absolute;
  top: 0;
  left: 0;
  transform: translate(-50%, -50%) scale(0.35);
  transform-origin: center center;
  border-radius: 4px;
  height: 32px;
  min-width: 84px;
  padding: 0 14px;
  background: var(--ink);
  color: #ffffff;
  letter-spacing: 0.045em;
  text-transform: uppercase;
  font-family: var(--font-mono), var(--font-body), sans-serif;
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  white-space: nowrap;
  box-shadow: 0 4px 18px rgba(22, 18, 12, 0.3), 0 0 0 1px rgba(168, 140, 85, 0.4);
  opacity: 0;
  pointer-events: none;
  transition:
    transform 0.24s cubic-bezier(0.2, 0.8, 0.2, 1),
    opacity 0.18s ease;
}

.mouse-stalker.is-label .mouse-stalker__lens {
  opacity: 0;
  transform: translate(-12px, -12px) scale(0.2);
}

.mouse-stalker.is-label .mouse-stalker__dot {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* 按下反馈 */
.mouse-stalker.is-down .mouse-stalker__lens {
  transform: translate(-12px, -12px) scale(0.85);
}
.mouse-stalker.is-down .mouse-stalker__dot {
  transform: translate(-50%, -50%) scale(0.88);
}

/* 文本输入时淡化光标，便于输入 */
.mouse-stalker.is-input {
  opacity: 0.12;
}

.mouse-stalker.is-input .mouse-stalker__lens {
  transform: translate(-12px, -12px) scale(0.5);
  opacity: 0.12;
}

.mouse-stalker.is-input .mouse-stalker__dot {
  opacity: 0;
}

/* 磁吸目标在动效期间保持高性能合成层 */
.k-trigger,
.u-nav__cmd,
.c-lang-toggle,
.u-nav__brand,
.v-hero__cta,
.v-hero__cue,
.c-btn,
.c-tab-btn,
.c-chip {
  will-change: transform;
}

/* 精细指针设备隐藏原生光标（文本输入框除外） */
@media (pointer: fine) {
  html.has-custom-cursor,
  html.has-custom-cursor body,
  html.has-custom-cursor a,
  html.has-custom-cursor button,
  html.has-custom-cursor select,
  html.has-custom-cursor [role="button"],
  html.has-custom-cursor [role="tab"],
  html.has-custom-cursor label,
  html.has-custom-cursor summary,
  html.has-custom-cursor .c-chip,
  html.has-custom-cursor .c-dropzone {
    cursor: none;
  }

  html.has-custom-cursor input[type="text"],
  html.has-custom-cursor input[type="search"],
  html.has-custom-cursor textarea,
  html.has-custom-cursor [contenteditable="true"] {
    cursor: text;
  }
}

/* 触屏与偏好减弱动效回退 */
@media (pointer: coarse) {
  .mouse-stalker { display: none !important; }
  body, a, button, select, label, summary { cursor: auto !important; }
}

@media (prefers-reduced-motion: reduce) {
  .mouse-stalker,
  .k-trigger,
  .u-nav__cmd,
  .c-lang-toggle,
  .u-nav__brand,
  .v-hero__cta,
  .v-hero__cue,
  .c-btn,
  .c-tab-btn,
  .c-chip {
    will-change: auto;
  }
}