:root { color-scheme: dark; }
html { scroll-behavior: smooth; }
body { font-family: 'Archivo', system-ui, sans-serif; }

.btn-primary {
  display: inline-flex; align-items: center; justify-content: center;
  background: #ecc600; color: #0b0b0b; font-weight: 700;
  padding: .75rem 1.25rem; border-radius: 9999px;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 30px -10px rgba(236,198,0,.6); }

.btn-ghost {
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid rgba(255,255,255,.2); color: #fff;
  padding: .75rem 1.25rem; border-radius: 9999px; font-weight: 600;
  transition: background .2s ease, border-color .2s ease;
}
.btn-ghost:hover { background: rgba(255,255,255,.06); border-color: rgba(236,198,0,.6); }

.btn-dark {
  display: inline-flex; align-items: center; justify-content: center;
  background: #0b0b0b; color: #fff; font-weight: 700;
  padding: .85rem 1.4rem; border-radius: 9999px;
}
.btn-dark:hover { background: #1e1e1e; }

.nav-link { color: rgba(255,255,255,.75); transition: color .15s ease; }
.nav-link:hover { color: #fff; }
.nav-link.active { color: #ecc600; }

.tech-chip {
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.02);
  padding: 1rem 1.25rem; border-radius: 12px;
  font-weight: 600; color: rgba(255,255,255,.85);
  text-align: center; transition: all .2s ease;
}
.tech-chip:hover { border-color: rgba(236,198,0,.5); color: #ecc600; }

.service-card {
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
  padding: 2rem; border-radius: 18px;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.service-card:hover { transform: translateY(-4px); border-color: rgba(236,198,0,.4); background: rgba(255,255,255,.05); }
.service-icon { font-size: 2rem; margin-bottom: 1rem; }

.section-title { font-family: 'Roboto', sans-serif; font-weight: 900; }

/* ----- Homepage interactive polish ----- */

/* Nav elevates on scroll */
#site-nav { transition: box-shadow .3s ease, background .3s ease; }
#site-nav.is-scrolled { box-shadow: 0 8px 30px -10px rgba(0,0,0,.6); background: rgba(11,11,11,.92); }

/* KLCC hero photo backdrop */
.hero-photo {
  opacity: 0.95;
  filter: saturate(1.05) contrast(1.05) brightness(0.95);
  animation: heroDrift 26s ease-in-out infinite alternate;
  will-change: transform;
  transform-origin: center;
}
@keyframes heroDrift {
  0%   { transform: scaleX(-1) scale(1.05) translate(-8px, -4px); }
  100% { transform: scaleX(-1) scale(1.08) translate(8px, 4px); }
}
@media (max-width: 640px) { .hero-photo { opacity: 0.8; } }
@media (prefers-reduced-motion: reduce) { .hero-photo { animation: none; transform: scaleX(-1) scale(1.05); } }

/* Subtle grid on hero */
.hero-grid {
  background-image:
    linear-gradient(to right, rgba(255,255,255,.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.5) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 50% 40%, black 40%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 40%, black 40%, transparent 75%);
}

/* Parallax blobs — smooth */
.parallax { transition: transform .4s cubic-bezier(.2,.7,.2,1); will-change: transform; }

/* Pulsing status dot */
.pulse-dot {
  width: 8px; height: 8px; border-radius: 9999px; background: #ecc600;
  box-shadow: 0 0 0 0 rgba(236,198,0,.7);
  animation: pulse 2s cubic-bezier(.4,0,.6,1) infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0    rgba(236,198,0,.6); }
  70%  { box-shadow: 0 0 0 10px rgba(236,198,0,0);  }
  100% { box-shadow: 0 0 0 0    rgba(236,198,0,0);  }
}

/* Rotating hero word */
.rotator-word {
  display: inline-block; min-width: 6ch;
  transition: opacity .25s ease, transform .25s ease;
}
.rotator-out { opacity: 0; transform: translateY(-8px); }
.rotator-in  { opacity: 1; transform: translateY(0); animation: rotIn .4s ease; }
@keyframes rotIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* Scroll reveal */
.reveal, .reveal-stagger > * {
  opacity: 0; transform: translateY(16px);
  transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1);
  will-change: opacity, transform;
}
.reveal.is-visible, .reveal-stagger > *.is-visible { opacity: 1; transform: translateY(0); }

/* Service card upgrades */
.service-icon-svg {
  width: 48px; height: 48px; border-radius: 12px;
  display: grid; place-items: center;
  background: rgba(236,198,0,.08);
  color: #ecc600;
  margin-bottom: 1.25rem;
  transition: background .3s ease, transform .3s ease, box-shadow .3s ease;
}
.service-icon-svg svg { width: 24px; height: 24px; }
.service-card { position: relative; }
.service-card:hover .service-icon-svg {
  background: #ecc600; color: #0b0b0b; transform: rotate(-6deg) scale(1.05);
  box-shadow: 0 10px 30px -10px rgba(236,198,0,.5);
}
.service-arrow {
  position: absolute; top: 1.5rem; right: 1.5rem;
  color: rgba(255,255,255,.15); font-size: 1.5rem;
  transition: color .3s ease, transform .3s ease;
}
.service-card:hover .service-arrow { color: #ecc600; transform: translate(4px, -4px); }

/* Tech chip hover lift */
.tech-chip { cursor: default; }
.tech-chip:hover { transform: translateY(-2px); }

/* Scroll cue */
.scroll-cue-line {
  width: 1px; height: 40px; background: currentColor; position: relative; overflow: hidden;
}
.scroll-cue-line::after {
  content: ''; position: absolute; top: -40px; left: 0; width: 100%; height: 40px;
  background: linear-gradient(to bottom, transparent, #ecc600);
  animation: scrollCue 2s ease-in-out infinite;
}
@keyframes scrollCue { 0% { top: -40px; } 100% { top: 40px; } }

/* CTA panel subtle sheen */
.cta-panel { transition: transform .3s ease; }
.cta-panel:hover { transform: translateY(-2px); }

/* ----- Clients marquee ----- */
.marquee-wrap {
  background: #ffffff;
  padding: 2rem 0;
  border-radius: 16px;
}
.marquee {
  position: relative;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 6%, black 94%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 6%, black 94%, transparent);
}
.marquee-track {
  display: flex;
  align-items: center;
  gap: 4rem;
  width: max-content;
  animation: marqueeScroll 60s linear infinite;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-item {
  flex-shrink: 0;
  display: flex; align-items: center;
}
.marquee-item img {
  height: 60px; width: auto;
  display: block;
  transition: transform .3s ease;
}
.marquee-item:hover img { transform: scale(1.08); }
@keyframes marqueeScroll {
  from { transform: translateX(0); }
  to   { transform: translateX(calc(-50% - 2rem)); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; flex-wrap: wrap; justify-content: center; width: 100%; }
}

/* ----- Portfolio page ----- */
.filter-chip {
  padding: .55rem 1rem; border-radius: 9999px;
  border: 1px solid rgba(255,255,255,.1);
  background: rgba(255,255,255,.02);
  color: rgba(255,255,255,.75);
  font-size: .85rem; font-weight: 600;
  transition: all .2s ease; cursor: pointer;
}
.filter-chip:hover { border-color: rgba(236,198,0,.5); color: #fff; }
.filter-chip.is-active { background: #ecc600; color: #0b0b0b; border-color: #ecc600; }

.project-card {
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 18px; overflow: hidden;
  transition: transform .25s ease, border-color .25s ease, background .25s ease, opacity .3s ease;
  display: flex; flex-direction: column;
}
.project-card:hover { transform: translateY(-4px); border-color: rgba(236,198,0,.4); background: rgba(255,255,255,.05); }
.project-card.is-hidden { display: none; }

.project-cover {
  aspect-ratio: 16 / 9; background: #0b0b0b;
  border-bottom: 1px solid rgba(255,255,255,.05);
}
.project-cover svg { display: block; }

.project-body { padding: 1.5rem 1.5rem 1.75rem; display: flex; flex-direction: column; gap: .5rem; flex: 1; }
.project-cat {
  color: #ecc600; font-size: .7rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; margin: 0 0 .25rem;
}
.project-title { font-family: 'Roboto', sans-serif; font-weight: 900; font-size: 1.35rem; line-height: 1.25; margin: 0 0 .35rem; }
.project-desc { color: rgba(255,255,255,.7); font-size: .95rem; line-height: 1.55; margin: 0 0 1rem; flex: 1; }
.project-stack { display: flex; flex-wrap: wrap; gap: .35rem; }
.project-stack span {
  font-size: .7rem; font-weight: 600;
  padding: .3rem .6rem; border-radius: 6px;
  background: rgba(236,198,0,.08); color: rgba(236,198,0,.9);
  border: 1px solid rgba(236,198,0,.15);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-stagger > * { opacity: 1 !important; transform: none !important; transition: none !important; }
  .pulse-dot, .scroll-cue-line::after, .rotator-word { animation: none !important; }
}