/* ============================================================================
   components.css — 加载器 / 页面切换 / 光标 / 通用交互件
   ========================================================================= */

/* ---------------------------------------------------------------- 加载器 */
.preloader {
  position: fixed;
  inset: 0;
  z-index: var(--z-preloader);
  /* 背景透明：遮罩由 SVG 里的 veil 负责 —— 字形挖空处透出底下运行的首屏 */
  background: transparent;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--gutter);
  will-change: opacity, transform;
}

/* ---------------------------------------------------- 文字蒙版（开屏）
   白色遮罩 + 黑色字形 = 字形是洞；洞里是 Hero 第一幕（视频 / 粒子） */
.preloader__mask {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.preloader__mask-svg {
  display: block;
  width: 100%;
  height: 100%;
}

.preloader__mask-veil {
  fill: var(--c-void);
  transition: opacity 0.9s var(--e-out) 0.45s;
}

.preloader__mask-text {
  transform-box: fill-box;
  transform-origin: 50% 50%;
  transition: transform 1.5s cubic-bezier(0.66, 0, 0.3, 1);
}

.preloader__mask-line {
  font-family: var(--f-display);
  font-size: clamp(3rem, 9.2vw, 9.6rem);
  font-weight: 600;
  letter-spacing: -0.03em;
}

/* 揭幕：文字蒙版放大到铺满画面（遮罩同步淡出），随后标题从中心落回左对齐 */
.preloader.is-reveal .preloader__mask-text {
  transform: scale(5.4);
}

.preloader.is-reveal .preloader__mask-veil {
  opacity: 0;
}

.preloader.is-reveal .preloader__bottom {
  opacity: 0;
  transition: opacity 0.4s var(--e-out);
}

@media (prefers-reduced-motion: reduce) {
  .preloader__mask-text {
    transition: none;
  }
}

.preloader__bottom {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--sp-6);
}

.preloader__pct {
  font-family: var(--f-display);
  font-size: clamp(2.4rem, 9vw, 6rem);
  line-height: 0.86;
  letter-spacing: -0.05em;
  font-variant-numeric: tabular-nums;
  color: var(--t-1);
}

.preloader__pct sup {
  font-size: 0.24em;
  letter-spacing: 0.02em;
  color: var(--t-3);
  top: -2.1em;
  margin-left: 0.4em;
}

.preloader__status {
  text-align: right;
}

.preloader__status-line {
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-tag);
  text-transform: uppercase;
  color: var(--t-3);
  margin-top: var(--sp-2);
}

.preloader__bar {
  position: absolute;
  left: var(--gutter);
  right: var(--gutter);
  bottom: 0;
  height: 1px;
  background: var(--line-2);
  transform-origin: left;
}

.preloader__bar span {
  display: block;
  height: 100%;
  width: var(--load, 0%);
  background: linear-gradient(
    to right,
    rgba(0, 168, 216, 0.5),
    var(--c-ice)
  );
  transition: width 0.5s var(--e-out);
}

.preloader.is-done {
  pointer-events: none;
  opacity: 0;
  transform: translate3d(0, -1.5%, 0);
  transition: opacity 0.9s var(--e-out), transform 1.2s var(--e-out);
}

.preloader.is-removed {
  display: none;
}

/* ------------------------------------------------------------ 页面切换 */
.page-transition {
  position: fixed;
  inset: 0;
  z-index: var(--z-transition);
  pointer-events: none;
  background: var(--c-void);
  clip-path: inset(100% 0 0 0);
  will-change: clip-path;
}

.page-transition__inner {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}

.page-transition__logo {
  height: 18px;
  opacity: 0;
  transition: opacity var(--d-2) var(--e-out);
}

.page-transition.is-cover .page-transition__logo,
.page-transition.is-cover .page-transition__meta {
  opacity: 0.7;
}

.page-transition__meta {
  position: absolute;
  left: var(--gutter);
  bottom: var(--gutter);
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-tag);
  text-transform: uppercase;
  color: var(--t-4);
  opacity: 0;
  transition: opacity var(--d-2) var(--e-out);
}

.page-transition.is-cover {
  clip-path: inset(0 0 0 0);
  transition: clip-path 0.66s var(--e-in-out);
}

.page-transition.is-reveal {
  clip-path: inset(0 0 100% 0);
  transition: clip-path 0.78s var(--e-in-out) 0.06s;
}

/* ---------------------------------------------------------------- 光标 */
.cursor {
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-cursor);
  pointer-events: none;
  mix-blend-mode: difference;
  opacity: 0;
  transition: opacity var(--d-2) var(--e-out);
}

.cursor__dot,
.cursor__ring {
  position: absolute;
  border-radius: 50%;
  will-change: transform;
}

.cursor__dot {
  width: 4px;
  height: 4px;
  margin: -2px 0 0 -2px;
  background: #fff;
}

.cursor__ring {
  width: 34px;
  height: 34px;
  margin: -17px 0 0 -17px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  transition: transform var(--d-2) var(--e-out),
    border-color var(--d-2) var(--e-out), opacity var(--d-2) var(--e-out);
}

.cursor.is-on {
  opacity: 1;
}

.cursor.is-hover .cursor__ring {
  transform: scale(1.5);
  border-color: rgba(143, 230, 255, 0.9);
}

.cursor.is-hidden {
  opacity: 0;
}

@media (hover: none), (pointer: coarse) {
  .cursor {
    display: none;
  }
}

/* -------------------------------------------------------- 通用小组件 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-tag);
  text-transform: uppercase;
  color: var(--t-3);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  padding: 5px 11px;
}

.tag i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--c-brand-lift);
  display: block;
}

.btn-line {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-tag);
  text-transform: uppercase;
  color: var(--t-1);
  padding-bottom: 8px;
  position: relative;
}

.btn-line::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--line-1);
  transition: background-color var(--d-2) var(--e-out);
}

.btn-line:hover::after {
  background: var(--c-brand-lift);
}

.btn-line svg {
  width: 12px;
  height: 12px;
  transition: transform var(--d-2) var(--e-out);
}

.btn-line:hover svg {
  transform: translate3d(4px, 0, 0);
}

/* 加载占位（骨架） */
.skeleton {
  position: relative;
  overflow: hidden;
  background: var(--c-night);
}

.skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    100deg,
    transparent 20%,
    rgba(143, 230, 255, 0.08) 50%,
    transparent 80%
  );
  transform: translate3d(-100%, 0, 0);
  animation: skeletonSweep 1.6s linear infinite;
}

@keyframes skeletonSweep {
  to {
    transform: translate3d(100%, 0, 0);
  }
}

/* 素材缺失提示（开发期可见，正式替换素材后自动消失） */
.media-missing {
  position: absolute;
  left: var(--gutter);
  bottom: 12px;
  z-index: 5;
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.08em;
  color: rgba(240, 120, 0, 0.85);
  pointer-events: none;
}

body.is-booting {
  overflow: hidden;
}