/* ═══════════════════════════════════════════════════
   style.css — SF90 XX Novitec Portfolio
═══════════════════════════════════════════════════ */

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

:root {
  --teal:    #0ab4c6;
  --gold:    #c4a030;
  --bg:      #06080b;
  --fg:      #f0ede8;
  --muted:   rgba(240,237,232,.42);

  /* Typography */
  --f-display: 'Bebas Neue', 'Arial Narrow', sans-serif;
  --f-ui:      'Barlow Condensed', 'Arial Narrow', sans-serif;
  --f-body:    'Barlow', Arial, sans-serif;
}

html { scroll-behavior: auto; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--f-body);
  overflow-x: hidden;
}

/* ════════════════════════════════════════════════
   INTRO PRE-HERO — coherent with scene 0
════════════════════════════════════════════════ */
.intro-kinetic {
  position: fixed;
  inset: 0;
  z-index: 9999;
  isolation: isolate;
  pointer-events: none;
  overflow: hidden;
  opacity: 0;
  transform: scale(1.012);
  transition: opacity .6s ease, transform 1s cubic-bezier(.16,1,.3,1);
}

.intro-kinetic.is-on {
  opacity: 1;
  transform: scale(1);
}

.intro-kinetic.is-leaving {
  opacity: 0;
  transform: scale(1.018);
}

.intro-kinetic.is-leaving .intro-hero-media {
  transform: scale(1.01);
  filter: brightness(.54) saturate(1.03);
}

.intro-kinetic.is-leaving .intro-hero-vignette {
  opacity: .42;
}

.intro-kinetic.is-leaving .intro-hero-body {
  opacity: .58;
  transform: translateY(-50%) scale(.99);
}

.intro-kinetic.is-leaving .intro-meta {
  opacity: .5;
  transform: translateY(3px);
}

.intro-hero-media {
  position: absolute;
  inset: 0;
  background: url('scaled_4976_novitec_f90xstra_pic01.jpg') center/cover no-repeat;
  filter: brightness(.62) saturate(1.05);
  transform: scale(1.08);
  animation: introMediaIn 2.2s cubic-bezier(.16,1,.3,1) forwards;
  transition: transform .65s ease, filter .65s ease;
}

.intro-hero-vignette {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right,
      rgba(6,8,11,.92) 0%,
      rgba(6,8,11,.48) 50%,
      rgba(6,8,11,.18) 100%),
    radial-gradient(ellipse at 18% 52%, rgba(10,180,198,.13) 0%, transparent 58%);
  transition: opacity .65s ease;
}

.intro-hero-body {
  position: absolute;
  left: 6vw;
  top: 50%;
  transform: translateY(-52%);
  max-width: 820px;
  z-index: 2;
  transition: opacity .65s ease, transform .65s ease;
}

.intro-badge {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}

.intro-badge-line {
  width: 0;
  height: 1px;
  background: var(--teal);
  box-shadow: 0 0 10px rgba(10,180,198,.6);
  animation: introLineGrow .62s cubic-bezier(.22,1,.36,1) .12s forwards;
}

.intro-badge span:last-child {
  position: relative;
  font-family: var(--f-ui);
  font-weight: 600;
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--teal);
  opacity: 0;
  transform: translateY(14px);
  animation: introReveal .62s cubic-bezier(.22,1,.36,1) .2s forwards;
}

.intro-title {
  font-family: var(--f-display);
  font-size: clamp(4.2rem, 11vw, 10.5rem);
  font-weight: 400;
  line-height: .92;
  letter-spacing: .01em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.intro-row {
  display: block;
  opacity: 0;
  transform: translateY(42px);
}

.intro-row:first-child {
  animation: introReveal .78s cubic-bezier(.18,1,.32,1) .28s forwards;
}

.intro-row:last-child {
  animation: introReveal .78s cubic-bezier(.18,1,.32,1) .42s forwards;
}

.intro-row em {
  font-style: normal;
  color: var(--teal);
  text-shadow: 0 0 20px rgba(10,180,198,.25);
}

.intro-sub {
  font-family: var(--f-body);
  font-weight: 300;
  font-size: clamp(.95rem, 1.6vw, 1.12rem);
  letter-spacing: .05em;
  color: rgba(240,237,232,.62);
  opacity: 0;
  transform: translateY(18px);
  animation: introReveal .68s cubic-bezier(.22,1,.36,1) .6s forwards;
}

.intro-meta {
  position: absolute;
  right: 6vw;
  bottom: 38px;
  text-align: right;
  display: flex;
  flex-direction: column;
  gap: 5px;
  z-index: 2;
  transition: opacity .65s ease, transform .65s ease;
}

.intro-meta span {
  font-family: var(--f-ui);
  font-size: .65rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(240,237,232,.52);
  opacity: 0;
  transform: translateY(12px);
  animation: introReveal .6s ease .78s forwards;
}

@keyframes introReveal {
  from {
    opacity: 0;
    transform: translateY(28px);
    filter: blur(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

@keyframes introLineGrow {
  from { width: 0; }
  to   { width: 38px; }
}

@keyframes introMediaIn {
  from { transform: scale(1.09); filter: brightness(.56) saturate(1.08); }
  to   { transform: scale(1.04); filter: brightness(.62) saturate(1.05); }
}

/* ════════════════════════════════════════════════
   STORY CONTAINER — 660vh
════════════════════════════════════════════════ */
.story {
  position: relative;
  height: 660vh;
}

.story-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
  background: var(--bg);
}

/* Film-grain overlay */
.story-sticky::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  opacity: .04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='250' height='250'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='250' height='250' filter='url(%23g)' opacity='.9'/%3E%3C/svg%3E");
  background-size: 250px 250px;
  mix-blend-mode: overlay;
}

/* ════════════════════════════════════════════════
   BACKGROUND STACK
════════════════════════════════════════════════ */
.bg-stack {
  position: absolute;
  inset: 0;
  z-index: 0;
  transform-origin: center;
  will-change: transform;
}

.bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0;
  will-change: opacity, transform;
}

#bg0 { opacity: 1; }

.bg-vignette {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(to right,
      rgba(6,8,11,.92) 0%,
      rgba(6,8,11,.45) 48%,
      rgba(6,8,11,.08) 100%),
    radial-gradient(ellipse at 12% 55%,
      rgba(10,180,198,.06) 0%, transparent 58%);
}

/* ════════════════════════════════════════════════
   HUD SCAN LINE
════════════════════════════════════════════════ */
.hud-scan {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  overflow: hidden;
  display: none;
}

.hud-scan::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right,
    transparent 0%,
    rgba(10,180,198,.06) 20%,
    rgba(10,180,198,.18) 50%,
    rgba(10,180,198,.06) 80%,
    transparent 100%);
  animation: hudScan 14s linear infinite;
  opacity: 0;
}

@keyframes hudScan {
  0%   { top: -1px; opacity: 0; }
  4%   { opacity: 1; }
  96%  { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

/* ════════════════════════════════════════════════
   SCENE TRANSITION SPEED LINE
════════════════════════════════════════════════ */
.transition-line {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: linear-gradient(to right,
    transparent 0%,
    var(--teal) 25%,
    rgba(255,255,255,.9) 50%,
    var(--teal) 75%,
    transparent 100%);
  box-shadow: 0 0 14px rgba(10,180,198,.6);
  z-index: 20;
  pointer-events: none;
  opacity: 0;
  transform: translateX(-110%);
}

.transition-line.flash {
  animation: lineFlash 1.4s cubic-bezier(.22,1,.36,1) forwards;
}

@keyframes lineFlash {
  0%   { transform: translateX(-110%); opacity: 0; }
  18%  { opacity: .58; }
  82%  { opacity: .58; }
  100% { transform: translateX(110%);  opacity: 0; }
}

/* ════════════════════════════════════════════════
   SCENES — all absolutely stacked
════════════════════════════════════════════════ */
.scene {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  pointer-events: none;   /* JS toggle for dominant scene */
}

/* ──────────────────────────────────────────────
   SCENE 0 — Hero
────────────────────────────────────────────── */
.s0-body {
  padding: 0 6vw;
  max-width: 820px;
}

.s0-badge {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
  opacity: 0;
}

.s0-line {
  display: block;
  width: 0;          /* animated to 38px by JS */
  height: 1px;
  background: var(--teal);
  box-shadow: 0 0 6px var(--teal);
  transition: none;
}

.s0-badge span:last-child {
  font-family: var(--f-ui);
  font-weight: 600;
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--teal);
}

.s0-title {
  display: flex;
  flex-direction: column;
  font-family: var(--f-display);
  font-size: clamp(4.2rem, 11vw, 10.5rem);
  font-weight: 400;
  line-height: .92;
  letter-spacing: .01em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.s0-title em {
  font-style: normal;
  color: var(--teal);
}

.t-row {
  display: block;
  opacity: 0;
  transform: translateY(46px);
}

.t-row,
.s0-sub,
.s0-btn-wrap,
.s0-meta span,
.s1-eye,
.s1-count,
.proj-num,
.proj-tag,
.proj-title,
.proj-desc,
.proj-btn {
  will-change: transform, opacity, filter;
  backface-visibility: hidden;
}

.s0-sub {
  font-family: var(--f-body);
  font-weight: 300;
  font-size: clamp(.95rem, 1.6vw, 1.12rem);
  letter-spacing: .05em;
  color: var(--muted);
  margin-bottom: 42px;
  opacity: 0;
  transform: translateY(22px);
}

.s0-btn-wrap {
  opacity: 0;
  transform: translateY(16px);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 13px 28px;
  border: 1px solid rgba(10,180,198,.4);
  color: var(--teal);
  font-family: var(--f-ui);
  font-weight: 600;
  font-size: .78rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  text-decoration: none;
  transition: background .3s, border-color .3s;
}

.btn-outline:hover {
  background: rgba(10,180,198,.1);
  border-color: var(--teal);
}

.btn-outline svg { width: 16px; height: 16px; flex-shrink: 0; }

.s0-meta {
  position: absolute;
  bottom: 38px;
  right: 6vw;
  text-align: right;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.s0-meta span {
  font-family: var(--f-ui);
  font-weight: 400;
  font-size: .65rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0;
}

/* ──────────────────────────────────────────────
   SCENE 1 — Intro Projets
────────────────────────────────────────────── */
#s1 {
  align-items: flex-start;
  padding-top: 14vh;
  overflow: hidden;
}

.s1-body {
  padding: 0 6vw;
}

.s1-eye {
  display: block;
  font-family: var(--f-ui);
  font-weight: 600;
  font-size: .7rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 18px;
  opacity: 0;
  transform: translateX(-22px);
}

.s1-title {
  display: flex;
  flex-direction: column;
  font-family: var(--f-display);
  font-size: clamp(5rem, 14vw, 13rem);
  font-weight: 400;
  line-height: .9;
  letter-spacing: 0;
  text-transform: uppercase;
}

.s1-title em {
  font-style: normal;
  color: transparent;
  -webkit-text-stroke: 2px rgba(240,237,232,.45);
}

.s1-count {
  margin-top: 36px;
  font-family: var(--f-ui);
  font-weight: 400;
  font-size: .72rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0;
}

/* ──────────────────────────────────────────────
   SCENE 1 — Sommaire déroulant
────────────────────────────────────────────── */
.s1-summary {
  margin-top: 24px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .4s ease, transform .4s ease;
}

.s1-summary.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Bouton toggle ── */
.s1-summary-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  color: var(--fg);
}

.sst-label {
  font-family: var(--f-ui);
  font-size: .65rem;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color .2s ease;
}

.s1-summary-toggle:hover .sst-label,
.s1-summary-toggle[aria-expanded="true"] .sst-label {
  color: var(--teal);
}

.sst-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .35s cubic-bezier(.16,1,.3,1);
}

.sst-icon svg {
  width: 13px;
  height: 13px;
  color: var(--teal);
}

.s1-summary-toggle[aria-expanded="true"] .sst-icon {
  transform: rotate(180deg);
}

/* ── Panel ── */
.s1-summary-panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height .45s cubic-bezier(.16,1,.3,1);
}

.s1-summary-panel.is-open {
  max-height: 80px;
}

/* ── Ligne unique ── */
.s1-summary-list {
  list-style: none;
  padding-top: 12px;
  display: flex;
  flex-direction: row;
  gap: 6px;
}

.s1-summary-item {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid rgba(240,237,232,.08);
  border-radius: 3px;
  white-space: nowrap;
  transition: background .2s ease, border-color .2s ease;
}

.s1-summary-item:hover {
  border-color: rgba(10,180,198,.28);
  background: rgba(10,180,198,.05);
}

/* Stagger */
.s1-summary-panel.is-open .s1-summary-item {
  animation: summaryItemIn .32s cubic-bezier(.16,1,.3,1) both;
}
.s1-summary-panel.is-open .s1-summary-item:nth-child(1) { animation-delay: .10s; }
.s1-summary-panel.is-open .s1-summary-item:nth-child(2) { animation-delay: .16s; }
.s1-summary-panel.is-open .s1-summary-item:nth-child(3) { animation-delay: .22s; }
.s1-summary-panel.is-open .s1-summary-item:nth-child(4) { animation-delay: .28s; }

@keyframes summaryItemIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0);   }
}

.ssi-num {
  font-family: var(--f-ui);
  font-size: .56rem;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--teal);
  opacity: .7;
}

.ssi-info {
  display: contents;
}

.ssi-name {
  font-family: var(--f-ui);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--fg);
}

.ssi-desc {
  display: none;
}

.ssi-tag {
  font-family: var(--f-ui);
  font-size: .55rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(196,160,48,.65);
  border: 1px solid rgba(196,160,48,.2);
  border-radius: 3px;
  padding: 2px 6px;
  white-space: nowrap;
}

/* ──────────────────────────────────────────────
   SCENES 2–5 — Projects
────────────────────────────────────────────── */
.s-proj {
  align-items: flex-end;
  padding-bottom: 9vh;
}

.proj-num {
  position: absolute;
  top: -0.06em;
  right: 2vw;
  font-family: var(--f-display);
  font-size: clamp(140px, 22vw, 250px);
  font-weight: 400;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px rgba(240,237,232,.20);
  letter-spacing: -.02em;
  pointer-events: none;
  opacity: 0;
  transform: translateX(34px);
  user-select: none;
}

.proj-body {
  padding: 0 6vw;
  max-width: 520px;
}

.proj-tag {
  display: block;
  font-family: var(--f-ui);
  font-weight: 600;
  font-size: .7rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 14px;
  opacity: 0;
  transform: translateX(-22px);
}

.proj-title {
  font-family: var(--f-display);
  font-size: clamp(3.6rem, 8.5vw, 8rem);
  font-weight: 400;
  line-height: .95;
  letter-spacing: .02em;
  text-transform: uppercase;
  margin-bottom: 22px;
  opacity: 0;
  transform: translateY(34px);
}

.proj-desc {
  font-family: var(--f-body);
  font-weight: 300;
  font-size: clamp(.88rem, 1.3vw, 1rem);
  line-height: 1.75;
  letter-spacing: .02em;
  color: var(--muted);
  max-width: 380px;
  margin-bottom: 38px;
  opacity: 0;
  transform: translateY(18px);
  filter: blur(4px);
}

/* ── Project button ─────────────────────────── */
.proj-btn {
  display: inline-flex;
  align-items: center;
  gap: 20px;
  text-decoration: none;
  color: var(--fg);
  cursor: pointer;
  opacity: 0;
  transform: translateY(14px);
}

.proj-btn:hover .pb-text { color: var(--teal); }

.pb-text {
  font-family: var(--f-ui);
  font-weight: 600;
  font-size: .76rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  transition: color .3s;
}

.pb-circle {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 1.5px solid rgba(10,180,198,.4);
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  transition: border-color .35s;
  flex-shrink: 0;
}

.pb-circle::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--teal);
  transform: scale(0);
  transition: transform .42s cubic-bezier(.16,1,.3,1);
}

.proj-btn:hover .pb-circle::before { transform: scale(1); }
.proj-btn:hover .pb-circle          { border-color: var(--teal); }
.proj-btn:hover .pb-circle svg      { stroke: var(--bg); }

.pb-circle svg {
  width: 17px;
  height: 17px;
  position: relative;
  z-index: 1;
  transition: stroke .3s;
}

/* "soon" state */
.proj-btn--soon { cursor: default; color: var(--muted); }
.pb-circle--soon { border-color: rgba(240,237,232,.12); }
.pb-circle--soon::before { display: none; }
.proj-btn--soon:hover .pb-text { color: inherit; }

/* ════════════════════════════════════════════════
   PERMANENT UI
════════════════════════════════════════════════ */

/* Scene counter — bottom left */
.scene-counter {
  position: absolute;
  bottom: 38px;
  left: 6vw;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-ui);
  font-weight: 400;
  font-size: .62rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
  pointer-events: none;
}

#scIdx {
  font-weight: 600;
  color: var(--fg);
  text-shadow: 0 0 0 rgba(10,180,198,0);
  transition: color .4s, text-shadow .45s ease;
}

#scIdx.is-pulse {
  animation: idxPulse .52s cubic-bezier(.22,1,.36,1);
}

@keyframes idxPulse {
  0%   { transform: translateY(6px); opacity: .35; }
  45%  { transform: translateY(-2px); opacity: 1; }
  100% { transform: translateY(0); opacity: 1; }
}

.sc-sep {
  display: block;
  width: 22px;
  height: 1px;
  background: rgba(240,237,232,.18);
}

/* Progress bar — right side, vertical */
.prog-track {
  position: absolute;
  top: 50%;
  right: 26px;
  transform: translateY(-50%);
  z-index: 10;
  width: 2px;
  height: 110px;
  background: rgba(240,237,232,.08);
  pointer-events: none;
}

.prog-fill {
  width: 100%;
  height: 0%;
  background: var(--teal);
  box-shadow: 0 0 10px rgba(10,180,198,.55);
  transition: box-shadow .35s ease;
}

@media (prefers-reduced-motion: reduce) {
  .transition-line.flash,
  .hud-scan::after,
  #scIdx.is-pulse,
  .intro-hero-media,
  .intro-badge-line,
  .intro-badge span:last-child,
  .intro-row:first-child,
  .intro-row:last-child,
  .intro-sub,
  .intro-meta span {
    animation: none !important;
  }

  .intro-kinetic,
  .intro-hero-media,
  .intro-hero-vignette,
  .intro-hero-body,
  .intro-meta {
    transition: none !important;
  }
}

/* ════════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════════ */
.footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  padding: 34px 6vw;
  border-top: 1px solid rgba(240,237,232,.05);
  font-family: var(--f-ui);
  font-weight: 400;
  font-size: .65rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.f-sep {
  display: block;
  width: 18px;
  height: 1px;
  background: rgba(240,237,232,.16);
}

/* ════════════════════════════════════════════════
   NAV HINT — flèches directionnelles
════════════════════════════════════════════════ */
@keyframes navHintFloat {
  0%, 100% { transform: translateX(-50%) translateY(0);    }
  50%       { transform: translateX(-50%) translateY(-8px); }
}

@keyframes navHintPulseKey {
  0%, 100% { opacity: .45; }
  50%       { opacity: 1;   }
}

@keyframes navHintFadeIn {
  from { opacity: 0; transform: translateX(-50%) translateY(14px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0);    }
}

.nav-hint {
  position: absolute;
  bottom: 38px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  pointer-events: none;
  animation:
    navHintFadeIn .8s cubic-bezier(.16,1,.3,1) 3.2s both,
    navHintFloat  2.4s ease-in-out             3.2s infinite;
  transition: opacity .5s ease, transform .5s ease;
  z-index: 10;
}

.nav-hint.is-gone {
  opacity: 0;
  transform: translateX(-50%) translateY(12px);
}

.nav-hint-keys {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.nav-hint-key {
  width: 32px;
  height: 32px;
  border: 1px solid rgba(240,237,232,.22);
  border-radius: 6px;
  background: rgba(6,8,11,.55);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: navHintPulseKey 2.4s ease-in-out 3.2s infinite;
}

.nav-hint-key--up   { animation-delay: 3.2s; }
.nav-hint-key--down { animation-delay: 4.4s; }

.nav-hint-key svg {
  width: 14px;
  height: 14px;
  color: var(--teal);
}

.nav-hint-label {
  font-family: var(--f-ui);
  font-size: .62rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(240,237,232,.38);
  white-space: nowrap;
}

/* ════════════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════════════ */
@media (max-width: 600px) {
  .intro-hero-body {
    left: 5vw;
    right: 5vw;
    top: 47%;
    transform: translateY(-50%);
  }

  .intro-title { font-size: clamp(3.5rem, 16vw, 6rem); }
  .intro-meta { right: 5vw; bottom: 28px; }

  .s0-title   { font-size: clamp(3.5rem, 16vw, 6rem); }
  .s1-title   { font-size: clamp(4rem,   20vw, 8rem); }
  .proj-title { font-size: clamp(3rem,   13vw, 5.5rem); }
  .proj-num   { font-size: clamp(100px,  32vw, 160px); }
  .prog-track { right: 12px; }
  .nav-hint   { bottom: 28px; }
}