/* ═══════════════════════════════════════════════════
   ABOUT SECTION — scoped under .section.about
═══════════════════════════════════════════════════ */

.section.about {
  background: #000;
}

/* ══════════════════════════════════════════════════
   GALLERY — 2 children
══════════════════════════════════════════════════ */

/* ── Child 1: ABOUT ME heading screen ── */
.ab-lbl-screen {
  height: 100vh;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ab-lbl-text {
  font-family: "Courier Prime", monospace;
  font-size: 64px;
  color: #6b1a1a;
  font-weight: 200;
  white-space: nowrap;
  letter-spacing: 0.12em;
}

/* ── Child 2: Painting screen — tall scroll container ── */
.ab-painting-screen {
  height: 280vh;
  position: relative;
  background: #050505;
}

/* Sticky shell — stays at center while parent scrolls */
.ab-painting-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  isolation: isolate;
}

.ab-painting-wrap {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  opacity: 0;
}

.ab-painting-img {
  display: block;
  width: 320px;
  max-width: 78vw;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 2px;
  filter: grayscale(1);
  transition: filter 0.6s ease;
  cursor: pointer;
}

.ab-painting-img:hover {
  filter: grayscale(0);
}

/* Museum wall plaque */
.ab-painting-plaque {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 10px 22px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.ab-pp-title {
  display: block;
  font-family: "Courier Prime", monospace;
  font-size: 11px;
  letter-spacing: 4px;
  color: rgba(255, 255, 255, 0.25);
  text-transform: uppercase;
}

.ab-pp-sub {
  display: block;
  font-family: "Courier Prime", monospace;
  font-size: 9px;
  letter-spacing: 2px;
  color: rgba(255, 255, 255, 0.12);
  text-transform: uppercase;
}

/* Ceiling beam — disabled */
.ab-spot-beam {
  display: none;
}

/* Darkness overlay — scroll-driven radial gradient hole */
.ab-spot-dark {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background: rgba(0, 0, 0, 0.97);
}

/* Warm glow overlay — screen blend adds golden warmth */
.ab-spot-glow {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  mix-blend-mode: screen;
  background: transparent;
}

/* ══════════════════════════════════════════════════
   SCROLL TEXT BLOCK
══════════════════════════════════════════════════ */
.ab-text-block {
  background: #000;
  padding: 80px 0 60px;
}

.ab-text-inner {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 40px;
  text-align: center;
}

.ab-line {
  display: block;
  font-family: "Courier Prime", monospace;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.15);
  transition: color 1.1s ease;
  will-change: color;
  text-align: justify;
}

.ab-line.ab-revealed {
  color: rgba(255, 255, 255, 0.88);
}

.ab-line-name {
  font-size: 38px;
  line-height: 1.15;
  margin-bottom: 6px;
  color: rgba(255, 255, 255, 0.1);
  font-weight: 400;
  text-align: justify;
}

.ab-line-name.ab-revealed {
  color: rgba(255, 255, 255, 0.95);
}

.ab-role-wrap {
  font-family: "Courier Prime", monospace;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.3);
  margin-bottom: 32px;
  letter-spacing: 0.05em;
  display: block;
  transition: color 1.1s ease;
  text-align: justify;
}

.ab-role-wrap.ab-revealed {
  color: rgba(255, 220, 160, 0.75);
}

/* Typed text always visible white */
.ab-role-wrap .input {
  color: rgba(255, 255, 255, 0.9);
}

.ab-spacer {
  display: block;
  height: 24px;
}

/* ══════════════════════════════════════════════════
   ACTIONS — CV, Contact, Social
══════════════════════════════════════════════════ */
.ab-actions {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
}

.ab-actions.ab-revealed {
  opacity: 1;
  transform: translateY(0);
}

.ab-btn-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.ab-btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 28px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: rgba(255, 255, 255, 0.75);
  font-family: "Courier Prime", monospace;
  font-size: 13px;
  text-decoration: none;
  background: transparent;
  cursor: pointer;
  overflow: hidden;
  position: relative;
  transition:
    border-color 0.4s ease,
    background 0.4s ease,
    color 0.4s ease;
}

.ab-btn.ab-btn-primary {
  background: rgba(255, 255, 255, 0.9);
  color: #111;
  border-color: transparent;
}

.ab-btn:hover {
  background: #fff;
  border-color: transparent;
  color: #000;
}

.ab-btn.ab-btn-primary:hover {
  background: #111;
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
}

/* ── Sliding text track — mirrors .cta-track / .cta-line ── */
.ab-btn-track {
  display: inline-flex;
  flex-direction: column;
  height: 1.1em;
  overflow: hidden;
  position: relative;
}

.ab-btn-line {
  display: flex;
  align-items: center;
  white-space: nowrap;
  line-height: 1.1;
  transition:
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.ab-btn-line-b {
  position: absolute;
  top: 100%;
  left: 0;
  opacity: 0;
  transform: translate(-5px, 0);
  transition:
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.ab-btn:hover .ab-btn-line-a {
  transform: translate(6px, -100%);
  opacity: 0;
}

.ab-btn:hover .ab-btn-line-b {
  transform: translate(0, -100%);
  opacity: 1;
}

.ab-social {
  display: flex;
  gap: 18px;
  align-items: center;
}

.ab-social a {
  color: rgba(255, 255, 255, 0.3);
  font-size: 18px;
  text-decoration: none;
  transition:
    color 0.3s ease,
    transform 0.3s ease;
}

.ab-social a:hover {
  color: #6b1a1a;
  transform: translateY(-4px);
}

/* ══════════════════════════════════════════════════
   SKILLS BLOCK
══════════════════════════════════════════════════ */
#sk-root {
  margin-top: 0;
  padding: 56px 30px 60px;
  background: #0a0a0a;
  border: none;
  border-radius: 0;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

#sk-root .sk-head {
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

#sk-root .sk-title {
  font-family: "Courier Prime", monospace;
  font-weight: 400;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  letter-spacing: 0.02em;
  color: #fff;
  /* color: rgba(255, 255, 255, 0.55); */
  line-height: 1.2;
}

#sk-root .sk-pills {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

#sk-root .sk-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 12px;
  border-radius: 100px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: transparent;
  color: #fff;
  /* rgba(255, 255, 255, 0.5); */
  font-family: "Courier Prime", monospace;
  font-size: clamp(0.72rem, 0.9vw, 0.9rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  cursor: default;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
  transition:
    background 0.3s ease,
    border-color 0.3s ease,
    color 0.25s ease;
}

#sk-root .sk-pill:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.9);
}

/* ── GRADIENT BRIDGE ── */
.ab-bridge {
  display: block;
  width: 100%;
  height: 60px;
  background: #000;
  pointer-events: none;
}

/* ══════════════════════════════════════════════════
   PH-ROOT / PH-WRAP / PH-CANVAS
══════════════════════════════════════════════════ */
#ph-root {
  all: initial;
  display: block;
  width: 100vw;
  position: relative;
  left: 50%;
  margin-left: -50vw;
  margin-top: 0;
  box-sizing: border-box;
  background: #000;
}
#ph-root * {
  box-sizing: border-box;
}

#ph-wrap {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  padding: 60px 0;
  overflow: hidden;
  position: relative;
  background: linear-gradient(
    to bottom,
    #000000 0%,
    #0a0a0a 12%,
    #303030 26%,
    #909090 38%,
    #c8c8c8 46%,
    #e0e0e0 50%,
    #c8c8c8 54%,
    #909090 62%,
    #303030 74%,
    #141414 86%,
    #0d0d0d 100%
  );
}

#ph-wrap::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 40%;
  z-index: 2;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 1) 0%,
    rgba(0, 0, 0, 0.3) 50%,
    rgba(0, 0, 0, 0) 100%
  );
  pointer-events: none;
}

#ph-wrap::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40%;
  z-index: 2;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 1) 0%,
    rgba(0, 0, 0, 0.3) 50%,
    rgba(0, 0, 0, 0) 100%
  );
  pointer-events: none;
}

#ph-canvas {
  display: block;
  max-width: 100%;
  cursor: crosshair;
  position: relative;
  z-index: 1;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .ab-lbl-screen {
    padding: 6vh 6vw;
  }

  .ab-lbl-text {
    font-size: clamp(3.5rem, 22vw, 8rem);
  }

  .ab-text-inner {
    padding: 0 24px;
  }

  .ab-line-name {
    font-size: 28px;
  }

  #sk-root {
    padding: 44px 24px 48px;
  }

  /* Mobile: 2 cột thay 4 cột */
  #sk-root .sk-pills {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 430px) {
  /* iPhone 14 Pro Max: 2 cột vừa đủ */
  #sk-root .sk-pills {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  #sk-root .sk-pill {
    font-size: 0.7rem;
    padding: 8px 8px;
  }
}

/* ══════════════════════════════════════════════════
   CANVAS TRIO  (#cv-trio)
══════════════════════════════════════════════════ */
#cv-trio {
  padding: 56px 30px 60px;
  background: #000000;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.cv-cell {
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  overflow: hidden;
  background: #000;
}

.cv-cell canvas {
  display: block;
  width: 100%;
  height: 100%;
}

@media (max-width: 768px) {
  #cv-trio {
    padding: 44px 24px 48px;
    gap: 12px;
  }
}