/* ===== enhancements (scroll text, About card art, easter eggs) ===== */
/* enhancements.css — add-on layer. Uses only the existing theme variables. */

/* 1. Scroll-driven headline (line-by-line color wipe) ----------------- */
/* Behaviour:
   - The headline paragraph is broken into line boxes (by JS) so each
     visual line gets its own gradient-fill animation.
   - While the headline is in view and we're at the top of #about, user
     scroll is "captured" — the page does NOT scroll. Instead, each
     scroll tick advances --scroll-fill from 0 to 1 LINE BY LINE:
 Line 1 fills first (its color goes gray → dark blue),
 then Line 2 starts,
 then Line 3, etc.
   - When the LAST line reaches --scroll-fill = 1, the scroll lock is
     released and the page begins to scroll normally.
   - The hover behaviour on the headline still works: hovering the
     paragraph fills every line with dark blue at once.
   - The .se-highlight span keeps its icon-reveal hover behaviour. */
.fx-word {
  color: inherit;
}

/* Container that holds the wrapped lines (each line is a .hl-line span). */
#about .hover-p .my-text-tilte2.fx-scrolltext-ready {
  /* Make this a block so its inline children (.hl-line) can wrap onto
     separate visual lines without affecting layout outside the span. */
  display: inline-block;
  /* Transparent fill — the gradient shows through via background-clip:text */
  -webkit-text-fill-color: transparent;
  color: transparent;
}
#about .hover-p .my-text-tilte2.fx-scrolltext-ready .hl-line {
  display: block; /* each line on its own row */
  white-space: normal;
  /* Two-stop gradient per line — dark blue (left, scrolled portion) +
     default text color (right, unscrolled portion). The middle stops
     slide based on the per-line --line-fill (0..1), producing a
     left-to-right color wipe that completes line-by-line. */
  background-image: linear-gradient(
    to right,
    #1d4ed8 0%,
    #1d4ed8 calc(var(--line-fill, 0) * 100%),
    var(--text-muted, #555555) calc(var(--line-fill, 0) * 100%),
    var(--text-muted, #555555) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  transition: background-image 0.05s linear;
  line-height: 1.5;
}
/* On hover of the parent .my-text-tilte2, fill every line at once. */
#about .hover-p .my-text-tilte2.fx-scrolltext-ready:hover .hl-line {
  background-image: linear-gradient(
    to right,
    #1d4ed8,
    #1d4ed8
  ) !important;
}
/* Dark theme fallback uses theme variables for the "default" gray end. */
[data-theme="dark"]
  #about
  .hover-p
  .my-text-tilte2.fx-scrolltext-ready
  .hl-line {
  background-image: linear-gradient(
    to right,
    var(--primary-blue) 0%,
    var(--primary-blue) calc(var(--line-fill, 0) * 100%),
    var(--text-muted, #7a7f8c) calc(var(--line-fill, 0) * 100%),
    var(--text-muted, #7a7f8c) 100%
  );
}
[data-theme="dark"]
  #about
  .hover-p
  .my-text-tilte2.fx-scrolltext-ready:hover
  .hl-line {
  background-image: linear-gradient(
    to right,
    var(--primary-blue),
    var(--primary-blue)
  ) !important;
}

/* 3. About cards: art, entrance, hover ---------------------------------- */
.about-card .fx-art {
  position: relative;
  aspect-ratio: 16 / 9;
  margin: 0 0 14px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-card-alt);
  border: 1px solid var(--border-light);
}
.fx-art::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
  background: radial-gradient(
    110px circle at calc(50% + var(--mx, 0) * 50%)
      calc(50% + var(--my, 0) * 50%),
    color-mix(in srgb, var(--primary-blue) 14%, transparent),
    transparent
  );
}
.about-card:hover .fx-art::after {
  opacity: 1;
}
.fx-art svg {
  display: block;
  width: 100%;
  height: 100%;
  translate: calc(var(--mx, 0) * -5px) calc(var(--my, 0) * -3px);
  transition:
    transform 0.8s cubic-bezier(0.2, 0.7, 0.2, 1),
    translate 0.25s ease-out;
}
.about-card:hover .fx-art svg {
  transform: scale(1.05);
}

.fx-g {
  transition: transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.fx-art .l {
  fill: none;
  stroke: var(--border-soft);
  stroke-width: 1;
}
.fx-art .grid {
  stroke: var(--border-light);
  stroke-width: 0.6;
}
.fx-art .box {
  fill: var(--bg-card);
  stroke: var(--text-muted);
  stroke-width: 1.2;
  transition:
    stroke 0.3s ease,
    stroke-width 0.3s ease;
}
.fx-art .hi {
  stroke: var(--primary-blue);
}
.fx-art .wire {
  fill: none;
  stroke: var(--primary-blue);
  stroke-width: 1.2;
  stroke-dasharray: 4 4;
  opacity: 0.7;
}
.fx-art text {
  font-family: "Space Mono", monospace;
  font-size: 10px;
  fill: var(--text-muted);
}
.fx-art .t-hi {
  fill: var(--primary-blue);
}
.fx-art .dot {
  fill: var(--border-soft);
  transition: fill 0.3s ease;
}
.fx-art .hi-dot {
  fill: var(--primary-blue);
}
.fx-art .pk {
  fill: var(--primary-blue);
  opacity: 0;
}
.fx-art .shield {
  fill: var(--bg-card);
  stroke: var(--primary-blue);
  stroke-width: 2;
}
.fx-art .ring {
  fill: none;
  stroke: var(--primary-blue);
  stroke-width: 1.5;
  opacity: 0;
  transform-origin: 160px 90px;
}
.fx-art .scan {
  fill: var(--primary-blue);
  opacity: 0.12;
}
.fx-art .tick {
  fill: none;
  stroke: var(--primary-blue);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 110;
  stroke-dashoffset: 0;
}

/* ambient (only once the card is in view) */
.about-card.fx-in .fx-art .wire {
  animation: fxDash 2.4s linear infinite;
}
.about-card.fx-in .fx-art .scan {
  animation: fxScan 3.6s ease-in-out infinite;
}
@keyframes fxDash {
  to {
    stroke-dashoffset: -16;
  }
}
@keyframes fxScan {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(124px);
  }
  100% {
    transform: translateY(0);
  }
}

/* hover */
.about-card:hover .fx-art .box {
  stroke: var(--primary-blue);
}
.about-card:hover .fx-art .hi {
  stroke-width: 2;
}
.about-card:hover .fx-art .wire {
  animation-duration: 0.9s;
}
.about-card:hover .fx-l1 {
  transform: translateY(-5px);
}
.about-card:hover .fx-l2 {
  transform: translateY(-5px);
  transition-delay: 0.06s;
}
.about-card:hover .fx-l3 {
  transform: translateY(-5px);
  transition-delay: 0.12s;
}
.about-card:hover .fx-s1 {
  transform: translateY(-6px);
}
.about-card:hover .fx-s3 {
  transform: translateY(6px);
}
.about-card:hover .fx-c1,
.about-card:hover .fx-c2,
.about-card:hover .fx-c3,
.about-card:hover .fx-c4 {
  transform: translateY(-4px);
}
.about-card:hover .fx-c2 {
  transition-delay: 0.05s;
}
.about-card:hover .fx-c3 {
  transition-delay: 0.1s;
}
.about-card:hover .fx-c4 {
  transition-delay: 0.15s;
}
.about-card:hover .fx-art .dot {
  animation: fxBlink 1.2s ease-in-out infinite;
}
.about-card:hover .fx-art .tick {
  animation: fxDraw 0.9s ease forwards;
}
.about-card:hover .fx-art .ring {
  animation: fxRing 1.4s ease-out infinite;
}
.about-card:hover .fx-art .pk-l {
  animation: fxPkL 1.7s ease-in-out infinite;
}
.about-card:hover .fx-art .pk-m {
  animation: fxPkM 1.7s ease-in-out 0.25s infinite;
}
.about-card:hover .fx-art .pk-r {
  animation: fxPkR 1.7s ease-in-out 0.5s infinite;
}
@keyframes fxBlink {
  0%,
  100% {
    fill: var(--border-soft);
  }
  50% {
    fill: var(--primary-blue);
  }
}
@keyframes fxDraw {
  from {
    stroke-dashoffset: 110;
  }
  to {
    stroke-dashoffset: 0;
  }
}
@keyframes fxRing {
  0% {
    opacity: 0.5;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.3);
  }
}
@keyframes fxPkL {
  0% {
    opacity: 0;
    transform: translate(0, 0);
  }
  10% {
    opacity: 1;
  }
  30% {
    transform: translate(0, 18px);
  }
  70% {
    transform: translate(-100px, 18px);
  }
  95% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translate(-100px, 38px);
  }
}
@keyframes fxPkM {
  0% {
    opacity: 0;
    transform: translate(0, 0);
  }
  15% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translate(0, 38px);
  }
}
@keyframes fxPkR {
  0% {
    opacity: 0;
    transform: translate(0, 0);
  }
  10% {
    opacity: 1;
  }
  30% {
    transform: translate(0, 18px);
  }
  70% {
    transform: translate(100px, 18px);
  }
  95% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translate(100px, 38px);
  }
}

/* entrance — armed only when JS has run */
.about-card.fx-pre {
  opacity: 0;
  translate: 0 16px;
}
.about-card.fx-pre,
.about-card.fx-in {
  transition:
    transform 0.3s ease,
    border-color 0.3s ease,
    box-shadow 0.3s ease,
    opacity 0.7s ease var(--d, 0ms),
    translate 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) var(--d, 0ms);
}
.about-card.fx-in {
  opacity: 1;
  translate: 0 0;
}
.about-card.fx-pre .fx-art {
  clip-path: inset(0 100% 0 0 round 8px);
}
.about-card.fx-in .fx-art {
  clip-path: inset(0 0 0 0 round 8px);
  transition: clip-path 0.9s cubic-bezier(0.2, 0.7, 0.2, 1)
    calc(var(--d, 0ms) + 120ms);
}
.about-card.fx-pre .d {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
}
.about-card.fx-in .d {
  stroke-dasharray: 1;
  stroke-dashoffset: 0;
  transition:
    stroke-dashoffset 1.2s ease calc(var(--d, 0ms) + 350ms),
    stroke 0.3s ease,
    stroke-width 0.3s ease;
}
.about-card.fx-pre .about-card__icon,
.about-card.fx-pre .about-card__title,
.about-card.fx-pre .about-card__text {
  opacity: 0;
  translate: 0 8px;
}
.about-card.fx-in .about-card__icon,
.about-card.fx-in .about-card__title,
.about-card.fx-in .about-card__text {
  opacity: 1;
  translate: 0 0;
  transition:
    opacity 0.5s ease,
    translate 0.5s ease;
}
.about-card.fx-in .about-card__icon {
  transition-delay: calc(var(--d, 0ms) + 450ms);
}
.about-card.fx-in .about-card__title {
  transition-delay: calc(var(--d, 0ms) + 550ms);
}
.about-card.fx-in .about-card__text {
  transition-delay: calc(var(--d, 0ms) + 650ms);
}

/* 4. Experience: scroll-linked timeline -------------------------------- */
/* .fx-line {
  position: absolute;
  left: 7px;
  top: 8px;
  width: 2px;
  height: calc((100% - 16px) * var(--lp, 0));
  background: var(--primary-blue);
  border-radius: 2px;
  z-index: 1;
  pointer-events: none;
}
.fx-line::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -4px;
  width: 8px;
  height: 8px;
  margin-left: -4px;
  border-radius: 50%;
  background: var(--primary-blue);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary-blue) 18%, transparent);
} */
.experience-list.fx-armed .experience-item {
  opacity: calc(0.5 + 0.5 * var(--f, 1));
}
/* nodes wake up as the line reaches them */
/* .experience-list.fx-armed .experience-item::before { border-color: var(--border-soft); } */
/* .experience-list.fx-armed .experience-item::after { background: var(--border-soft); } */
.experience-list.fx-armed .experience-item.fx-on::before {
  border-color: var(--primary-blue);
}
.experience-list.fx-armed .experience-item.fx-on::after {
  background: var(--primary-blue);
}
/* reveal */
.experience-list.fx-armed .experience-item .experience-header {
  opacity: 0;
  translate: -26px 0;
}
.experience-list.fx-armed .experience-item .experience-content {
  clip-path: inset(0 -30px 100% -30px);
}
.experience-list.fx-armed .experience-item .experience-logo {
  opacity: 0;
  scale: 0.6;
  rotate: -14deg;
}
.experience-list.fx-armed .experience-item .experience-date {
  opacity: 0;
  scale: 0.8;
}
.experience-list.fx-armed .experience-item .experience-content li {
  opacity: 0;
  translate: -14px 0;
}

.experience-list.fx-armed .experience-item.fx-xin .experience-header {
  opacity: 1;
  translate: 0 0;
  transition:
    opacity 0.6s ease,
    translate 0.7s cubic-bezier(0.2, 0.7, 0.2, 1),
    transform 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease;
}
.experience-list.fx-armed .experience-item.fx-xin .experience-content {
  clip-path: inset(0 -30px -30px -30px);
  transition:
    clip-path 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) 0.2s,
    transform 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease;
}
.experience-list.fx-armed .experience-item.fx-xin .experience-logo {
  opacity: 1;
  scale: 1;
  rotate: 0deg;
  transition:
    opacity 0.5s ease 0.15s,
    scale 0.7s cubic-bezier(0.3, 1.4, 0.5, 1) 0.15s,
    rotate 0.7s cubic-bezier(0.3, 1.4, 0.5, 1) 0.15s,
    background-color 0.4s ease,
    border-color 0.4s ease;
}
.experience-list.fx-armed .experience-item.fx-xin .experience-date {
  opacity: 1;
  scale: 1;
  transition:
    opacity 0.4s ease 0.4s,
    scale 0.5s cubic-bezier(0.3, 1.4, 0.5, 1) 0.4s,
    background-color 0.4s ease,
    border-color 0.4s ease,
    color 0.4s ease;
}
.experience-list.fx-armed .experience-item.fx-xin .experience-content li {
  opacity: 1;
  translate: 0 0;
  transition:
    opacity 0.5s ease calc(0.5s + var(--i, 0) * 80ms),
    translate 0.5s cubic-bezier(0.2, 0.7, 0.2, 1)
      calc(0.5s + var(--i, 0) * 80ms),
    color 0.4s ease;
}

/* 2. Easter eggs ------------------------------------------------------- */
.about-skill-chip[data-tip] {
  position: relative;
}
@media (hover: hover) {
  .about-skill-chip[data-tip]::after {
    content: attr(data-tip);
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translate(-50%, 4px);
    padding: 4px 8px;
    border-radius: 6px;
    background: var(--text-dark);
    color: var(--bg-white);
    font:
      11px "Space Mono",
      monospace;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition:
      opacity 0.2s ease,
      transform 0.2s ease;
    z-index: 20;
  }
  .about-skill-chip[data-tip]:hover::after {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

.fx-toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  max-width: min(340px, calc(100vw - 36px));
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--bg-card);
  color: var(--text-dark);
  border: 1px solid var(--primary-blue);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  font:
    12px/1.5 "Space Mono",
    monospace;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition:
    opacity 0.25s ease,
    transform 0.25s ease;
  z-index: 9998;
  white-space: pre-line;
}
.fx-toast.show {
  opacity: 1;
  transform: translateY(0);
}

.fx-glyph {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 9997;
  pointer-events: none;
  color: var(--primary-blue);
  font:
    700 14px "Space Mono",
    monospace;
  animation: fxFly 1.3s ease-out forwards;
}
@keyframes fxFly {
  from {
    transform: translate(var(--x), var(--y));
    opacity: 1;
  }
  to {
    transform: translate(
      calc(var(--x) + var(--dx)),
      calc(var(--y) + var(--dy))
    );
    opacity: 0;
  }
}

.fx-term {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  width: min(620px, calc(100vw - 24px));
  height: min(340px, 60vh);
  display: none;
  flex-direction: column;
  background: var(--bg-card);
  color: var(--text-dark);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.25);
  font:
    12px/1.6 "Space Mono",
    monospace;
  z-index: 9999;
  overflow: hidden;
}
.fx-term.open {
  display: flex;
}
.fx-term__bar {
  display: flex;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--bg-card-alt);
  border-bottom: 1px solid var(--border-light);
  color: var(--text-muted);
  font-size: 11px;
}
.fx-term__out {
  flex: 1;
  overflow-y: auto;
  padding: 10px 12px;
  white-space: pre-wrap;
  word-break: break-word;
}
.fx-term__out .dim {
  color: var(--text-muted);
}
.fx-term__out .hl {
  color: var(--primary-blue);
}
.fx-term__row {
  display: flex;
  gap: 8px;
  padding: 8px 12px;
  border-top: 1px solid var(--border-light);
}
.fx-term__row span {
  color: var(--primary-blue);
}
.fx-term__in {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  outline: 0;
  color: var(--text-dark);
  font: inherit;
}

@media (prefers-reduced-motion: reduce) {
  .about-card.fx-pre,
  .about-card.fx-in {
    transition: none;
    opacity: 1;
    translate: none;
  }
  .fx-art svg,
  .fx-art .box,
  .fx-toast {
    transition: none;
  }
  .about-card:hover .fx-art svg {
    transform: none;
  }
  .about-card:hover .fx-art .wire,
  .about-card:hover .fx-art .tick {
    animation: none;
  }
  .about-card:hover .fx-s1,
  .about-card:hover .fx-s3 {
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .fx-art svg {
    translate: none;
  }
  .fx-art .pk,
  .fx-art .scan,
  .fx-art .ring,
  .fx-art .dot,
  .fx-art .wire {
    animation: none !important;
  }
  .about-card:hover .fx-l1,
  .about-card:hover .fx-l2,
  .about-card:hover .fx-l3,
  .about-card:hover .fx-c1,
  .about-card:hover .fx-c2,
  .about-card:hover .fx-c3,
  .about-card:hover .fx-c4 {
    transform: none;
  }
}