/* =============================================
   SOVIOTECH — Light theme (oguz-inspired)
   ============================================= */

:root {
  --bg:        #ffffff;
  --bg-2:      #f7f7f8;
  --bg-3:      #f0f0f1;
  --surface:   #ffffff;
  --border:    #e6e6ea;
  --border-2:  #d4d4d8;
  --text:      #0a0a0b;
  --text-2:    #52525b;
  --text-3:    #8a8a93;
  --accent:    #0a0a0b;
  --accent-2:  #303033;
  --accent-dim:rgba(10,10,11,0.04);
  --accent-glow:rgba(10,10,11,0.08);
  --blue:      #2563eb;
  --term-bg:   #0c0c0e;
  --term-bg-2: #161618;
  --term-border: #232328;
  --term-text: #e8e6e3;
  --term-text-2: #9d9b97;
  --term-text-3: #6b6966;
  --term-accent: #c8ff00;
  --chrome-bg: #fafafa;
  --logo-invert: 0;

  --font:  'Space Grotesk', -apple-system, sans-serif;
  --mono:  'JetBrains Mono', 'Fira Code', monospace;
  --ease:  cubic-bezier(0.16, 1, 0.3, 1);
  --max-w: 1200px;
}

/* In dark mode: cards stay dark (blend with page), terminal becomes light (contrast flip) */
:root[data-theme="dark"] .project__terminal {
  background: #f4f4f5;
  border-color: rgba(0,0,0,0.08);
}
:root[data-theme="dark"] .project__terminal-bar {
  background: #e6e6ea;
  border-bottom-color: rgba(0,0,0,0.08);
}
:root[data-theme="dark"] .project__terminal-bar span { background: #c8c8cc; }
:root[data-theme="dark"] .project__terminal pre { color: #0a0a0b; }
:root[data-theme="dark"] .t-comment { color: rgba(10,10,11,0.5); }
:root[data-theme="dark"] .t-key     { color: rgba(10,10,11,0.65); }
:root[data-theme="dark"] .t-prop    { color: #1e40af; }
:root[data-theme="dark"] .t-val     { color: #15803d; }
:root[data-theme="dark"] .t-str     { color: #b45309; }
:root[data-theme="dark"] .t-caret   { background: #15803d; }

/* DARK THEME OVERRIDE */
:root[data-theme="dark"] {
  --bg:        #0a0a0b;
  --bg-2:      #111113;
  --bg-3:      #19191d;
  --surface:   #111113;
  --border:    #232328;
  --border-2:  #3a3a45;
  --text:      #f4f4f5;
  --text-2:    #a1a1aa;
  --text-3:    #71717a;
  --accent:    #f4f4f5;
  --accent-2:  #d4d4d8;
  --accent-dim:rgba(244,244,245,0.06);
  --accent-glow:rgba(244,244,245,0.12);
  --chrome-bg: #19191d;
  --logo-invert: 1;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  scroll-snap-type: y proximity;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.hide-mobile { display: inline; }
@media (max-width: 640px) { .hide-mobile { display: none; } }

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 1000;
  background: var(--text);
  color: #fff;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 12px 18px;
  border-radius: 6px;
  text-decoration: none;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 16px; }
:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
  border-radius: 4px;
}
.btn--magnetic:focus-visible { transform: none !important; }

/* NAV */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: all 0.4s var(--ease);
}
.nav--scrolled {
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.nav--hidden { transform: translateY(-100%); }

.nav__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.01em;
}
.nav__logo-mark { color: var(--text-3); font-weight: 600; }
.nav__logo-img { height: 68px; width: auto; display: block; filter: invert(var(--logo-invert)); }
.stack-card__brand { filter: invert(var(--logo-invert)); }
.footer__logo-img { height: 68px; width: auto; display: block; filter: invert(var(--logo-invert)); }
.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav__links a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s var(--ease);
}
.nav__links a:hover { color: var(--text); }
.nav__cta {
  border: 1px solid var(--text);
  padding: 9px 18px;
  border-radius: 999px;
  color: var(--text) !important;
  transition: all 0.25s var(--ease);
}
.nav__cta:hover { background: var(--text); color: var(--bg) !important; }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--border-2);
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.theme-toggle:hover { border-color: var(--text); background: var(--accent-dim); }
:root[data-theme="dark"] .theme-toggle svg {
  /* swap sun icon visual hint via rotation when dark */
  transform: rotate(40deg);
}
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav__toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s var(--ease);
}
.nav__toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.open span:nth-child(2) { transform: translateY(0) rotate(-45deg); }

@media (max-width: 820px) {
  /* Mobile: drop backdrop-filter so it doesn't create a containing block
     for the fixed nav__links overlay (which was making the menu break when scrolled). */
  .nav--scrolled {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .nav__toggle {
    display: flex;
    position: relative;
    z-index: 102;
  }
  .nav__links {
    position: fixed;
    inset: 0;
    background: var(--bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    font-size: 1.5rem;
    padding: 32px;
    opacity: 0;
    pointer-events: none;
    transform: scale(0.985);
    transform-origin: top right;
    transition: opacity 0.32s var(--ease), transform 0.4s var(--ease);
    z-index: 101;
  }
  .nav__links.open { opacity: 1; pointer-events: auto; transform: scale(1); }

  /* Staggered item entrance */
  .nav__links > * {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.35s var(--ease), transform 0.45s var(--ease);
  }
  .nav__links.open > * { opacity: 1; transform: translateY(0); }
  .nav__links.open > *:nth-child(1) { transition-delay: 0.08s; }
  .nav__links.open > *:nth-child(2) { transition-delay: 0.14s; }
  .nav__links.open > *:nth-child(3) { transition-delay: 0.20s; }
  .nav__links.open > *:nth-child(4) { transition-delay: 0.26s; }
  .nav__links.open > *:nth-child(5) { transition-delay: 0.32s; }
  .nav__links a {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text);
  }
  .nav__cta {
    font-size: 1.05rem;
    padding: 14px 28px;
  }
  .theme-toggle {
    width: 44px;
    height: 44px;
  }
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 14px 28px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  white-space: nowrap;
}
.btn--primary { background: var(--text); color: var(--bg); }
.btn--primary:hover { background: var(--bg); color: var(--text); border-color: var(--text); }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--border-2); }
.btn--ghost:hover { border-color: var(--text); }
.btn--lg { padding: 18px 36px; font-size: 1rem; }

/* HERO */
.hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
  background: var(--bg);
}
.hero__grid-bg, .hero__noise { display: none; }

.hero__content {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.hero__tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-3);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  margin-bottom: 32px;
}
.hero__title {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.02;
  margin-bottom: 28px;
  color: var(--text);
}
.hero__title-accent {
  display: inline-block;
  color: var(--text-3);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}
.hero__title-accent--out { opacity: 0; transform: translateY(-8px); }
.hero__sub {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--text-2);
  max-width: 640px;
  margin-bottom: 40px;
  line-height: 1.6;
}
.hero__actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 72px;
}
.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  max-width: 880px;
}
.hero__stat { display: flex; flex-direction: column; gap: 4px; }
.hero__stat-num, .hero__stat-artifact {
  font-family: var(--mono);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
  line-height: 1;
}
.hero__stat-unit { font-size: 1.3rem; color: var(--text-3); margin-left: 2px; }
.hero__stat-label { font-size: 0.85rem; font-weight: 500; color: var(--text); margin-top: 8px; }
.hero__stat-sub { font-size: 0.75rem; color: var(--text-3); font-family: var(--mono); }
.hero__scroll-hint { display: none; }

@media (max-width: 720px) {
  .hero { padding: 120px 0 60px; }
  .hero__stats { grid-template-columns: 1fr; gap: 24px; }
}

/* MARQUEE */
.marquee {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  padding: 18px 0;
  display: flex;
  align-items: center;
  gap: 24px;
  overflow: hidden;
}
.marquee__label {
  flex-shrink: 0;
  padding-left: 24px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
}
.marquee__viewport {
  flex: 1;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee__track {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  white-space: nowrap;
  animation: marqueeScroll 60s linear infinite;
}
.marquee__track span {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text);
}
.marquee__dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--text-3) !important;
}
@keyframes marqueeScroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* SECTION HEADER */
section { padding: 110px 0; }
.section-header { max-width: 760px; margin: 0 auto 64px; text-align: center; }
.section-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-3);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--text);
  margin-bottom: 18px;
}
.section-sub { font-size: 1.05rem; color: var(--text-2); line-height: 1.6; }

/* SOLUTIONS */
.solutions { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.solutions__grid--bento {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 20px;
}
.solution-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
  transition: all 0.3s var(--ease);
  opacity: 0;
  transform: translateY(20px);
}
.solution-card.revealed { opacity: 1; transform: none; }
.solution-card:hover {
  border-color: var(--text);
  transform: translateY(-3px);
  box-shadow: 0 20px 40px -20px rgba(0,0,0,0.15);
}
.solution-card--wide {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
  align-items: center;
}
.solution-card__icon {
  width: 44px; height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  margin-bottom: 20px;
  background: var(--bg-2);
}
.solution-card__icon svg { width: 22px; height: 22px; }
.solution-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.solution-card p {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 16px;
}
.solution-card__tags { display: flex; flex-wrap: wrap; gap: 6px; }
.solution-card__tags span {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-2);
  padding: 4px 10px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.solution-card__demo {
  background: var(--term-bg);
  border-radius: 10px;
  padding: 16px;
  color: var(--term-text);
  font-family: var(--mono);
  font-size: 0.75rem;
  min-height: 180px;
}
.solution-card__demo--stream .stream__head {
  display: flex; align-items: center; gap: 8px;
  color: var(--term-text-3); margin-bottom: 10px;
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em;
}
.stream__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #4ade80; box-shadow: 0 0 8px #4ade80;
  animation: pulse 1.5s ease-in-out infinite;
}
.stream__feed { display: flex; flex-direction: column; gap: 6px; }
.stream__row { line-height: 1.6; }

.solution-card__demo--chart .chart__head {
  display: flex; justify-content: space-between; margin-bottom: 12px;
}
.chart__metric { font-size: 0.7rem; color: var(--term-text-3); text-transform: uppercase; letter-spacing: 0.1em; }
.chart__value { font-size: 1.3rem; font-weight: 700; color: var(--term-text); display: block; }
.chart__range { font-size: 0.7rem; color: var(--term-text-3); }
.chart__svg { width: 100%; height: 80px; display: block; }
.chart__axis {
  display: flex; justify-content: space-between;
  font-size: 0.65rem; color: var(--term-text-3); margin-top: 6px;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@media (max-width: 820px) {
  .solutions__grid--bento { grid-template-columns: 1fr; }
  .solution-card--wide { grid-template-columns: 1fr; }
}

/* PROCESS */
.process { background: var(--bg); }
.process__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.process__step {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s var(--ease);
}
.process__step.revealed { opacity: 1; transform: none; }
.process__step-num {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-3);
  letter-spacing: 0.1em;
  margin-bottom: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}
.process__step h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.process__step p { font-size: 0.9rem; color: var(--text-2); line-height: 1.6; }
.process__connector { display: none; }

@media (max-width: 900px) { .process__steps { grid-template-columns: repeat(2, 1fr); gap: 20px; } }
@media (max-width: 540px) { .process__steps { grid-template-columns: 1fr; } }

/* PROJECTS — sticky-stack carousel */
.projects {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 110px 0 60px;
}

.stack-rail {
  position: relative;
  padding: 40px 0 0;
}
.stack-rail__title {
  position: absolute;
  top: 50%;
  left: 6vw;
  transform: translateY(-50%);
  z-index: 200;
  pointer-events: none;
  max-width: 22vw;
}
.stack-rail__name { font-size: clamp(1.4rem, 2.6vw, 2.2rem); }
.stack-rail__date {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-3);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 12px;
  transition: opacity 0.35s var(--ease);
}
.stack-rail__name {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  transition: opacity 0.35s var(--ease);
  line-height: 1.15;
}
.stack-rail__title.swapping .stack-rail__date,
.stack-rail__title.swapping .stack-rail__name { opacity: 0; }

/* Rolodex layout — single sticky stage holds all cards; spacers drive the scroll */
.stack-rail__cards { position: relative; }
.stack-stage {
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 2;
  display: block;
  perspective: 1400px;
  perspective-origin: 50% 50%;
  overflow: hidden;
}
/* Horizon fade — sits above cards, transparent in middle so title shows through */
.stack-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 110;
  background:
    linear-gradient(to bottom, var(--bg-2) 0, transparent 6%, transparent 94%, var(--bg-2) 100%);
}
.stack-spacer {
  height: 100vh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}
.stack-card {
  position: absolute;
  top: 50%;
  left: 64%;
  width: min(62vw, 1020px);
  height: 72vh;
  transform: translate(-50%, -50%);
  will-change: transform, opacity;
  background: var(--bg);
  color: var(--text);
  border-radius: 18px;
  box-shadow:
    0 40px 100px -28px rgba(10,10,11,0.35),
    0 12px 32px -12px rgba(10,10,11,0.12),
    0 2px 6px -2px rgba(10,10,11,0.08),
    0 0 0 1px rgba(10,10,11,0.04);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform-origin: 50% 0%;
  will-change: transform, opacity, filter;
  transition: transform 0.6s var(--ease), box-shadow 0.6s var(--ease);
}

/* Hover lift — additive via individual props so JS transform on .style is preserved */
.stack-card {
  translate: 0 0;
  scale: 1;
  transition: translate 0.35s var(--ease), scale 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.stack-card.is-active:hover {
  translate: 0 -6px;
  scale: 1.008;
  box-shadow:
    0 56px 120px -28px rgba(10,10,11,0.42),
    0 18px 40px -12px rgba(10,10,11,0.16),
    0 2px 6px -2px rgba(10,10,11,0.08),
    0 0 0 1px rgba(10,10,11,0.06);
}

.stack-card__chrome {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--chrome-bg);
  flex-shrink: 0;
}
.stack-card__brand { height: 36px; width: auto; display: block; }
.stack-card__tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  margin: 0 auto;
}
.stack-card__num { font-family: var(--mono); font-size: 0.7rem; color: var(--text-3); }

.stack-card__body {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  padding: 28px 32px;
  overflow: hidden;
  min-height: 0;
}

/* Trim cards to a single-view glance: hide long results + extra desc */
.stack-card .project__result { display: none; }
.stack-card .project__desc:nth-of-type(2) { display: none; }
.stack-card .project__desc { font-size: 0.88rem; }
.stack-card .project__info {
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.stack-card .project__title { font-size: 1.3rem; }
.stack-card__visual {
  display: flex;
  align-items: stretch;
  justify-content: stretch;
  min-height: 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-2);
}
.stack-card__visual iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.project__title {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: var(--text);
}
.project__industry {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-3);
  display: block;
  margin-bottom: 6px;
}
.project__type {
  font-size: 0.82rem;
  color: var(--text-3);
  display: block;
  margin-bottom: 18px;
}
.project__desc {
  font-size: 0.92rem;
  color: var(--text-2);
  line-height: 1.65;
  margin-bottom: 10px;
}
.project__result { margin: 18px 0; display: flex; flex-direction: column; gap: 12px; }
.project__result-item { padding-left: 14px; border-left: 2px solid var(--text); }
.project__result-item strong {
  display: block;
  font-size: 0.88rem;
  color: var(--text);
  margin-bottom: 2px;
  font-weight: 600;
}
.project__result-item span { font-size: 0.82rem; color: var(--text-2); line-height: 1.5; }
.project__stack { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.project__stack span {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-2);
  background: var(--bg-2);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 999px;
}
.project__repo { display: flex; align-items: center; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.project__repo-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--text);
  text-decoration: none;
  padding: 7px 12px;
  border: 1px solid var(--border-2);
  border-radius: 999px;
  background: var(--bg);
  transition: all 0.2s var(--ease);
}
.project__repo-link:hover { border-color: var(--text); background: var(--text); color: var(--bg); }
.project__repo-arrow { display: inline-block; transition: transform 0.2s var(--ease); }
.project__repo-link:hover .project__repo-arrow { transform: translateX(3px); }
.project__repo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-3);
  padding: 6px 11px;
  border: 1px dashed var(--border-2);
  border-radius: 999px;
}

/* model-viewer fills the render slot edge-to-edge */
.project__render model-viewer {
  width: 100%;
  height: 100%;
  display: block;
  --poster-color: transparent;
}

/* 3D render slot — placeholder until WebGL renders ship */
.project__render {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  min-height: 0;
  position: relative;
  isolation: isolate;
}
/* ponytail: script.js fades neighbour cards via opacity. Their model-viewer
   canvas is alpha-channel transparent, so the model behind shows through.
   Force each card's body to its own opaque paint layer so opacity only
   affects the card as a whole, not the WebGL layer behind it. */
.stack-card { background: var(--bg); }
.stack-card__body { background: var(--bg); }
.project__render-placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 35%, var(--bg-3) 0%, var(--bg-2) 70%),
    linear-gradient(135deg, var(--bg-2), var(--bg-3));
  background-blend-mode: normal;
}
.project__render-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-3);
}
.project__render-hint {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-2);
}

/* Terminal stays dark — the contrast move */
.project__terminal {
  background: var(--term-bg);
  border: 1px solid var(--term-border);
  border-radius: 10px;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 0.74rem;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.project__terminal pre { flex: 1; overflow: hidden; }
.project__terminal-bar {
  display: flex; gap: 6px;
  padding: 10px 14px;
  background: var(--term-bg-2);
  border-bottom: 1px solid var(--term-border);
}
.project__terminal-bar span {
  width: 9px; height: 9px; border-radius: 50%; background: var(--term-border);
}
.project__terminal pre { padding: 18px; overflow-x: auto; line-height: 1.75; color: var(--term-text); }
.project__terminal code { font-family: var(--mono); }
.t-comment { color: var(--term-text-3); }
.t-key     { color: var(--term-text-2); }
.t-prop    { color: #6ea8ff; }
.t-val     { color: var(--term-accent); }
.t-str     { color: #e8a848; }
.t-caret {
  display: inline-block;
  width: 8px;
  background: var(--term-accent);
  color: transparent;
  margin-left: 2px;
  animation: caretBlink 1s steps(2) infinite;
  vertical-align: baseline;
}
@keyframes caretBlink {
  0%, 50%   { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* Mobile-only stub that replaces the carousel */
.projects-mobile { display: none; }
@media (max-width: 900px) {
  .projects { display: none !important; }   /* skip the whole carousel on mobile */
  .projects-mobile {
    display: block;
    background: var(--bg-2);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 80px 0;
    text-align: center;
  }
  .projects-mobile .section-sub { margin: 14px auto 0; max-width: 480px; }
  /* (carousel rules below are now dead on mobile but kept harmless) */
  .stack-stage { perspective: none; }
  .stack-stage::before { display: none; }
  .stack-rail__cards { perspective: none; }
  .stack-card { will-change: transform, opacity; }
  .stack-rail { padding: 0; }
  .stack-rail__title {
    top: 14vh;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    max-width: 80vw;
  }
  .stack-rail__title .stack-rail__date { margin-bottom: 4px; }
  .stack-rail__name { font-size: 1.2rem; }
  .stack-card {
    left: 50%;
    width: 92vw;
    height: 64vh;
    top: 56%;
  }
  .stack-card__body { grid-template-columns: 1fr; gap: 18px; padding: 20px; overflow: auto; }
  .project__terminal { min-height: 200px; }
  .stack-card .project__title { font-size: 1.15rem; }
}
@media (max-width: 540px) {
  .stack-card { width: 94vw; height: 62vh; }
  .stack-card__body { padding: 18px; gap: 14px; }
  .stack-card .project__desc { font-size: 0.85rem; }
}

/* OPEN SOURCE */
.oss { background: var(--bg); }
.oss__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.oss__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.25s var(--ease);
  opacity: 0;
  transform: translateY(16px);
}
.oss__card.revealed { opacity: 1; transform: none; }
.oss__card:hover {
  border-color: var(--text);
  transform: translateY(-3px);
  box-shadow: 0 18px 40px -22px rgba(0,0,0,0.18);
}
.oss__card-head { display: flex; justify-content: space-between; align-items: center; }
.oss__icon { color: var(--text); }
.oss__card-arrow { font-size: 1.1rem; color: var(--text-3); transition: all 0.2s var(--ease); }
.oss__card:hover .oss__card-arrow { color: var(--text); transform: translate(3px, -3px); }
.oss__card h3 { font-size: 1.05rem; font-weight: 700; letter-spacing: -0.01em; }
.oss__card p { font-size: 0.88rem; color: var(--text-2); line-height: 1.55; flex: 1; }
.oss__card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--text-3);
  padding-top: 12px;
  border-top: 1px solid var(--border);
  margin-top: 6px;
}
.oss__lang { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.oss__lang--js  { background: #f1e05a; }
.oss__lang--ts  { background: #3178c6; }
.oss__lang--py  { background: #3572A5; }
.oss__lang--cpp { background: #f34b7d; }
.oss__lang--all { background: var(--text); }
.oss__card--more { background: var(--bg-2); }

@media (max-width: 820px) { .oss__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .oss__grid { grid-template-columns: 1fr; } }

/* STACK */
.stack { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.stack__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.stack__col {
  padding: 26px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  opacity: 0;
  transform: translateY(16px);
  transition: all 0.5s var(--ease);
}
.stack__col.revealed { opacity: 1; transform: none; }
.stack__col h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.stack__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 6px #4ade80;
}
.stack__col ul { list-style: none; display: flex; flex-direction: column; gap: 9px; }
.stack__col li { font-family: var(--mono); font-size: 0.85rem; color: var(--text-2); }
@media (max-width: 820px) { .stack__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .stack__grid { grid-template-columns: 1fr; } }

/* TEAM */
.team { background: var(--bg); }
.team__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.team__member {
  padding: 32px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  text-align: center;
  opacity: 0;
  transform: translateY(16px);
  transition: all 0.5s var(--ease);
}
.team__member.revealed { opacity: 1; transform: none; }
.team__avatar {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: var(--text);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 16px;
}
.team__member h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 4px; }
.team__role {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 14px;
}
.team__member p { font-size: 0.9rem; color: var(--text-2); line-height: 1.6; }
@media (max-width: 820px) { .team__grid { grid-template-columns: 1fr; } }

/* CTA */
.cta { background: var(--bg-2); border-top: 1px solid var(--border); }
.cta__inner { text-align: center; max-width: 760px; margin: 0 auto; }
.cta__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin: 16px 0 18px;
}
.cta__sub { font-size: 1.05rem; color: var(--text-2); margin-bottom: 36px; line-height: 1.6; }
.cta__actions { display: flex; justify-content: center; margin-bottom: 24px; }
.cta__details { font-family: var(--mono); font-size: 0.78rem; color: var(--text-3); }

/* FOOTER */
.footer { background: var(--bg); border-top: 1px solid var(--border); padding: 36px 0; }
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}
.footer__brand { font-family: var(--mono); font-weight: 700; letter-spacing: -0.01em; }
.footer__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-2);
}
.footer__status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 6px #4ade80;
  animation: pulse 1.8s ease-in-out infinite;
}
.footer__copy { font-size: 0.8rem; color: var(--text-3); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .marquee__track { animation: none !important; }
}

/* =============================================
   WORK PAGE
   ============================================= */
.nav__link--active { color: var(--text) !important; }

.work-hero {
  padding: 180px 0 60px;
  background: var(--bg);
  text-align: left;
}
.work-hero__title {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.02;
  margin: 28px 0 24px;
  color: var(--text);
}
.work-hero__sub {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--text-2);
  max-width: 640px;
  line-height: 1.6;
}

.work-section { padding: 60px 0 110px; background: var(--bg); }

.work__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.work__filter-btn {
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-2);
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.work__filter-btn:hover { border-color: var(--text); color: var(--text); }
.work__filter-btn.is-active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.work__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
  transition: opacity 0.22s var(--ease), transform 0.32s var(--ease);
}
.work__grid.is-switching {
  opacity: 0;
  transform: translateY(8px);
}

.work__pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 48px;
}
.work__pager-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--border-2);
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.work__pager-arrow:hover { background: var(--text); color: var(--bg); border-color: var(--text); }
.work__pager-arrow:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.work__pager-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}
.work__pager-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-2);
  border: 0;
  cursor: pointer;
  padding: 0;
  transition: all 0.2s var(--ease);
}
.work__pager-dot:hover { background: var(--text-3); }
.work__pager-dot.is-active {
  background: var(--text);
  width: 22px;
  border-radius: 4px;
}

.work-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: all 0.25s var(--ease);
}
.work-card:hover {
  border-color: var(--text);
  transform: translateY(-3px);
  box-shadow: 0 18px 40px -22px rgba(0,0,0,0.18);
}
.work-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.work-card__cat {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-3);
}
.work-card__github {
  color: var(--text-3);
  transition: color 0.2s var(--ease);
}
.work-card__github:hover { color: var(--text); }

.work-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  line-height: 1.3;
}
.work-card__tagline {
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.55;
  flex: 1;
}
.work-card__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 2px; }
.work-card__tags span {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-2);
  background: var(--bg-2);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 999px;
}
.work-card__actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.work-card__btn {
  flex: 1;
  text-align: center;
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 9px 12px;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid var(--border-2);
  transition: all 0.2s var(--ease);
}
.work-card__btn--ghost { color: var(--text-2); background: transparent; }
.work-card__btn--ghost:hover { color: var(--text); border-color: var(--text); }
.work-card__btn--primary {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}
.work-card__btn--primary:hover { background: var(--bg); color: var(--text); }

/* =============================================
   ABOUT PAGE
   ============================================= */
.about-team { padding: 80px 0 110px; background: var(--bg); }
.about-team__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
}
.about-member {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 28px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: all 0.25s var(--ease);
}
.about-member:hover {
  border-color: var(--text);
  transform: translateY(-3px);
  box-shadow: 0 18px 40px -22px rgba(0,0,0,0.18);
}
.about-member__num {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--text-3);
  margin-bottom: 6px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.about-member__name {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  line-height: 1.3;
}
.about-member__bio {
  font-size: 0.9rem;
  color: var(--text-2);
  line-height: 1.6;
}

/* PDF MODAL */
.pdf-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 32px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s var(--ease);
}
.pdf-modal[aria-hidden="false"] {
  display: flex;
  opacity: 1;
  pointer-events: auto;
}
.pdf-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10,10,11,0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.pdf-modal__panel {
  position: relative;
  width: min(1100px, 100%);
  height: min(92vh, 100%);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 40px 100px -20px rgba(0,0,0,0.5);
  transform: translateY(12px) scale(0.985);
  transition: transform 0.3s var(--ease);
}
.pdf-modal[aria-hidden="false"] .pdf-modal__panel {
  transform: translateY(0) scale(1);
}
.pdf-modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
}
.pdf-modal__eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-3);
  margin-bottom: 2px;
}
.pdf-modal__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}
.pdf-modal__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.pdf-modal__btn {
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 500;
  text-decoration: none;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-2);
  color: var(--text);
  transition: all 0.2s var(--ease);
}
.pdf-modal__btn:hover { background: var(--text); color: var(--bg); border-color: var(--text); }
.pdf-modal__close {
  background: transparent;
  border: 1px solid var(--border-2);
  border-radius: 999px;
  width: 32px;
  height: 32px;
  font-size: 1.2rem;
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  line-height: 1;
}
.pdf-modal__close:hover { background: var(--text); color: var(--bg); border-color: var(--text); }
.pdf-modal__body {
  flex: 1;
  background: var(--bg-3);
  min-height: 0;
}
.pdf-modal__body iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  background: var(--bg-3);
}

@media (max-width: 640px) {
  .pdf-modal { padding: 0; }
  .pdf-modal__panel { height: 100vh; border-radius: 0; border: 0; }
  .pdf-modal__title { font-size: 0.9rem; }
}