/* ==========================================================================
   kidoapp — « Précision studio »
   Sombre high-tech sobre. Accent ambre propulsion, jamais de néon.
   Réf : docs/superpowers/specs/2026-07-16-refonte-precision-studio-design.md
   ========================================================================== */

:root {
  --bg: #0A0A0C;
  --surface: #111114;
  --text: #EDEDEF;
  --muted: #8A8A93;
  --hairline: #26262B;
  --amber: #F59E0B;
  --amber-hot: #F97316;

  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --container: 1160px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --section-pad: clamp(4.5rem, 11vh, 8rem);

  --ease-out: cubic-bezier(.19, 1, .22, 1);
}

/* ---------- base ---------- */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.02em;
}
p { margin: 0; }
a { color: inherit; }
ul, ol, dl, dd, dt { margin: 0; padding: 0; }
li { list-style: none; }

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

::selection { background: var(--amber); color: var(--bg); }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--amber);
  color: var(--bg);
  padding: .6rem 1.2rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 12, .82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -.01em;
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
}

.logo-dot {
  width: .5em;
  height: .5em;
  border-radius: 50%;
  background: var(--amber);
  align-self: center;
  margin-inline: .12em;
  transition: transform .5s var(--ease-out);
}
.logo:hover .logo-dot { transform: scale(1.3); }

.site-header nav {
  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 3vw, 2.2rem);
}

.site-header nav a {
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .06em;
  color: var(--muted);
  position: relative;
  padding-block: .3rem;
  transition: color .3s;
}
.site-header nav a:hover { color: var(--text); }

.site-header nav a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .45s var(--ease-out);
}
.site-header nav a:not(.nav-cta):hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  border: 1px solid var(--hairline);
  padding: .45rem 1.1rem;
  color: var(--text);
  transition: border-color .3s, color .3s;
}
.nav-cta:hover { border-color: var(--amber); color: var(--amber); }

/* ---------- boutons ---------- */

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .88rem;
  letter-spacing: .04em;
  text-decoration: none;
  padding: .9rem 1.9rem;
  transition: background .3s, color .3s, border-color .3s;
}

.btn-solid {
  background: var(--text);
  color: var(--bg);
}
.btn-solid:hover { background: var(--amber); }

.btn-line {
  border: 1px solid var(--hairline);
  color: var(--text);
}
.btn-line:hover { border-color: var(--amber); color: var(--amber); }

.btn-large { padding: 1.05rem 2.4rem; font-size: .95rem; }

/* ---------- hero ---------- */

.hero {
  border-bottom: 1px solid var(--hairline);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  min-height: min(88vh, 820px);
  padding-block: clamp(2.5rem, 6vh, 4rem);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: clamp(1.4rem, 3vh, 2rem);
  animation: fade-up .8s var(--ease-out) both .1s;
}

.blink {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  animation: pulse 2.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .3; }
}

.hero h1 {
  font-size: clamp(2.6rem, 5.6vw, 4.6rem);
}

.hero h1 .line { display: block; overflow: hidden; }
.hero h1 .line > span {
  display: block;
  animation: line-up .9s var(--ease-out) both .15s;
}
.hero h1 .line:nth-child(2) > span { animation-delay: .3s; }

@keyframes line-up {
  from { transform: translateY(110%); }
  to   { transform: translateY(0); }
}

.hero h1 .accent {
  font-style: normal;
  color: var(--amber);
}

.lead {
  max-width: 32rem;
  margin-top: clamp(1.4rem, 3vh, 2rem);
  color: var(--muted);
  animation: fade-up .8s var(--ease-out) both .5s;
}
.lead strong { color: var(--text); font-weight: 600; }

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  margin-top: clamp(1.6rem, 4vh, 2.4rem);
  animation: fade-up .8s var(--ease-out) both .65s;
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --- scène orbitale --- */

.hero-visual { min-width: 0; }

.orbit-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-height: 76vh;
  animation: fade-in 1.2s ease both .4s;
}

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

#orbit-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.orbit-core {
  position: absolute;
  top: 50%;
  left: 50%;
  translate: -50% -50%;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--text);
  pointer-events: none;
  z-index: 2;
}

.orbit-sat {
  position: absolute;
  top: 0;
  left: 0;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--muted);
  text-decoration: none;
  padding: .3rem .5rem;
  z-index: 3;
  transition: color .25s;
  will-change: transform;
}

.orbit-sat:hover, .orbit-sat:focus-visible {
  color: var(--text);
}
.orbit-sat:hover .sat-dot, .orbit-sat:focus-visible .sat-dot {
  transform: scale(1.6);
}

.sat-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  transition: transform .3s var(--ease-out);
}

.telemetry {
  position: absolute;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--muted);
  opacity: .75;
}
.tl-tl { top: .4rem; left: .6rem; }
.tl-br { bottom: .4rem; right: .6rem; }

/* ---------- libellés de section ---------- */

.section-label {
  display: flex;
  align-items: center;
  gap: .8rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: clamp(1.6rem, 4vh, 2.4rem);
}

.label-num { color: var(--amber); }

.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--hairline);
}

.section-title {
  font-size: clamp(1.9rem, 4.2vw, 3.1rem);
  margin-bottom: clamp(1rem, 2.5vh, 1.5rem);
}

.section-intro {
  max-width: 36rem;
  color: var(--muted);
  margin-bottom: clamp(2.2rem, 5vh, 3.4rem);
}

/* ---------- 01 mesures ---------- */

.stats { padding-block: var(--section-pad); }

.stat-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--hairline);
}

.stat {
  display: grid;
  align-content: center;
  gap: .2rem;
  padding: clamp(1.5rem, 4vh, 2.4rem) clamp(1rem, 2.5vw, 2rem);
}

.stat + .stat { border-left: 1px solid var(--hairline); }

.stat dd {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  line-height: 1;
}

.stat dt {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 02 produits ---------- */

.products { padding-block: 0 var(--section-pad); }

.product-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.product-card {
  position: relative;
  background: var(--bg);
  padding: clamp(1.7rem, 3.5vw, 2.6rem);
  display: grid;
  gap: 1rem;
  align-content: start;
  transition: background .35s;
}

.product-card:hover { background: var(--surface); }

/* coin ambre au survol */
.product-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 14px;
  height: 14px;
  border-top: 2px solid var(--amber);
  border-right: 2px solid var(--amber);
  opacity: 0;
  transform: translate(-8px, 8px);
  transition: opacity .3s, transform .4s var(--ease-out);
  pointer-events: none;
}
.product-card:hover::after {
  opacity: 1;
  transform: translate(0, 0);
}

/* tracé de la bordure à l'apparition */
.product-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-bottom: 1px solid var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  opacity: .55;
  pointer-events: none;
}
.product-card.is-visible::before {
  animation: trace 1s var(--ease-out) both;
}
@keyframes trace {
  from { transform: scaleX(0); }
  60%  { transform: scaleX(1); opacity: .55; }
  to   { transform: scaleX(1); opacity: 0; }
}

.product-card h3 {
  font-size: 1.4rem;
  letter-spacing: -.01em;
}

.product-card h3 a { text-decoration: none; }
.product-card h3 a:hover { color: var(--amber); }

.ext {
  font-size: .65em;
  margin-left: .4em;
  vertical-align: .3em;
  color: var(--muted);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: .3rem;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  animation: pulse 2.4s ease-in-out infinite;
}

.product-card > p { color: var(--muted); font-size: .96rem; }

.stack {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.stack li {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .05em;
  border: 1px solid var(--hairline);
  padding: .22rem .6rem;
  color: var(--muted);
}

/* ---------- 03 équipage — réseau neuronal ---------- */

.crew {
  padding-block: var(--section-pad) 0;
  border-top: 1px solid var(--hairline);
}

.neural-stage {
  position: relative;
  width: 100%;
  height: clamp(340px, 52vh, 520px);
  margin-block: clamp(1rem, 3vh, 2rem) clamp(2.5rem, 6vh, 4rem);
  border-block: 1px solid var(--hairline);
  background: var(--surface);
}

#neural-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

/* ---------- méthode ---------- */

.method-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(2rem, 5vw, 3.5rem);
  padding-bottom: var(--section-pad);
}

.method-steps li {
  display: grid;
  gap: .8rem;
  align-content: start;
}

.step-head {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.step-num {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .2em;
  color: var(--amber);
}

.step-rule {
  flex: 1;
  height: 1px;
  background: var(--hairline);
}

.method-steps h3 { font-size: 1.4rem; }
.method-steps p { color: var(--muted); font-size: .96rem; }

/* ---------- 04 manifeste ---------- */

.manifesto {
  padding-block: var(--section-pad);
  border-top: 1px solid var(--hairline);
}

.manifesto-inner { max-width: 54rem; }

.convictions li {
  padding-block: clamp(1.1rem, 2.8vh, 1.6rem);
  border-bottom: 1px solid var(--hairline);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.8vw, 2rem);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: -.01em;
}

.convictions li::before {
  content: "/";
  color: var(--amber);
  margin-right: 1rem;
  font-family: var(--font-mono);
  font-size: .8em;
}

.signature {
  margin-top: clamp(1.8rem, 4vh, 2.6rem);
  color: var(--muted);
  font-size: .95rem;
}
.signature a { color: var(--text); text-decoration-color: var(--amber); text-underline-offset: 4px; }

/* ---------- 05 contact ---------- */

.contact {
  position: relative;
  border-top: 1px solid var(--hairline);
  padding-block: var(--section-pad);
  overflow: hidden;
  background: var(--surface);
}

/* orbites en filigrane */
.contact-orbits {
  position: absolute;
  top: 50%;
  right: -12%;
  translate: 0 -50%;
  width: min(60vw, 720px);
  aspect-ratio: 1;
  pointer-events: none;
}
.contact-orbits span {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(237, 237, 239, .12);
  border-radius: 50%;
  transform: rotateX(70deg);
}
.contact-orbits span:nth-child(2) { inset: 12%; transform: rotateX(70deg) rotate(18deg); }
.contact-orbits span:nth-child(3) { inset: 26%; transform: rotateX(70deg) rotate(-14deg); }

.contact-inner {
  position: relative;
  display: grid;
  justify-items: start;
  gap: clamp(1.1rem, 2.8vh, 1.6rem);
}

.contact-inner .section-label { width: 100%; margin-bottom: 0; }

.contact-title {
  font-size: clamp(2.4rem, 5.4vw, 4.2rem);
}

.contact-lead { color: var(--muted); max-width: 30rem; }

.contact-hint {
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--muted);
}
.contact-hint a { color: var(--text); text-decoration-color: var(--amber); text-underline-offset: 4px; }

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--hairline);
  padding-block: 1.5rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--muted);
}

.footer-inner nav { display: flex; gap: 1.4rem; }
.footer-inner a { color: var(--muted); text-decoration-color: var(--hairline); text-underline-offset: 4px; }
.footer-inner a:hover { color: var(--amber); }

/* ---------- révélations au scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
  transition-delay: var(--reveal-delay, 0s);
}

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

/* ---------- responsive ---------- */

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    min-height: 0;
  }
  .orbit-stage { max-width: 520px; margin-inline: auto; }
  .stat-band { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(3) { border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--hairline); }
  .method-steps { grid-template-columns: 1fr; gap: 2rem; }
}

@media (max-width: 700px) {
  .product-grid { grid-template-columns: 1fr; }
  .site-header nav a:not(.nav-cta) { display: none; }
  .neural-stage { height: 320px; }
}

/* ---------- mouvement réduit ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}