/* ============================================================
   escalade.css — sticky "heat rises" section
   ============================================================ */

.esc { position: relative; height: 340vh; background: var(--bg-deep); }
.esc__sticky { position: sticky; top: 0; height: 100vh; overflow: hidden; display: flex; align-items: center; }

/* Flou progressif + fondu sombre en bas (adoucit le bas, soigne la transition) */
.esc__sticky::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0;
  height: 42vh; z-index: 3; pointer-events: none;
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  -webkit-mask-image: linear-gradient(to top, #000 8%, transparent 92%);
  mask-image: linear-gradient(to top, #000 8%, transparent 92%);
  background: linear-gradient(to top, var(--bg-deep) 2%, oklch(0.12 0.02 10 / 0.35) 36%, transparent 72%);
}

.esc__bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(90% 70% at 50% 118%, oklch(0.82 0.13 78 / 0.30), transparent 62%),
    radial-gradient(80% 60% at 18% 8%, oklch(0.22 0.04 30 / 0.6), transparent 70%);
  transition: background .2s;
}
.esc__bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(95% 80% at 50% 122%, oklch(0.60 0.22 22 / 0.55), transparent 60%),
    radial-gradient(70% 55% at 50% 120%, oklch(0.55 0.23 18 / 0.4), transparent 55%);
  opacity: var(--p, 0);
  transition: opacity .25s;
}
.esc__grain {
  position: absolute; inset: 0; z-index: 1; pointer-events: none; opacity: 0.05; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.esc__layout {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 0.92fr auto 1.06fr;
  gap: clamp(28px, 4vw, 64px); align-items: center; width: 100%;
}

/* left column */
.esc__left { max-width: 440px; }
.esc__h2 { margin-top: 16px; }
.esc__intro { margin-top: 18px; max-width: 42ch; }
.esc__steps { margin-top: 30px; display: flex; flex-direction: column; gap: 4px; }
.esc__step {
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 14px;
  background: transparent; border: 0; border-top: 1px solid var(--line-soft);
  padding: 16px 4px; text-align: left; width: 100%; transition: .35s; opacity: 0.5;
}
.esc__step:last-child { border-bottom: 1px solid var(--line-soft); }
.esc__step.done { opacity: 0.65; }
.esc__step.on { opacity: 1; }
.esc__step-n { font-family: var(--mono); font-size: 13px; color: var(--ink-faint); transition: .35s; }
.esc__step.on .esc__step-n { color: var(--accent-bright); }
.esc__step-k { font-family: var(--serif); font-style: italic; font-size: clamp(17px, 1.8vw, 21px); color: var(--ink-soft); transition: .35s; }
.esc__step.on .esc__step-k { color: var(--ink); }
.esc__step-dot { width: 11px; height: 11px; border-radius: 50%; border: 1.5px solid var(--line); transition: .35s; }
.esc__step.on .esc__step-dot { border-color: var(--accent); background: var(--accent-bright); box-shadow: 0 0 0 5px var(--accent-tint); }
.esc__step.done .esc__step-dot { background: var(--accent-deep); border-color: var(--accent-deep); }

/* center gauge */
.esc__center { display: flex; justify-content: center; }
.esc__gauge { position: relative; height: 58vh; max-height: 460px; display: flex; align-items: stretch; gap: 16px; }
.esc__gauge-track { position: relative; width: 10px; border-radius: 999px; background: oklch(1 0 0 / 0.08); overflow: hidden; box-shadow: 0 0 0 1px var(--line) inset; }
.esc__gauge-fill {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(180deg, oklch(0.60 0.22 22), oklch(0.72 0.18 42) 50%, var(--heat-0));
  border-radius: 999px;
  box-shadow: 0 0 18px oklch(0.65 0.2 30 / 0.7);
  transition: height .15s linear;
}
.esc__gauge-read { align-self: flex-start; display: flex; flex-direction: column; }
.esc__temp { font-family: var(--mono); font-size: 30px; font-weight: 600; color: var(--ink); line-height: 1; }
.esc__temp-l { font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-faint); font-family: var(--mono); margin-top: 6px; }

/* right panels */
.esc__right { position: relative; min-height: 480px; }
.esc__panel {
  position: absolute; inset: 0; display: grid; grid-template-columns: 0.92fr 1.08fr; gap: clamp(20px, 3vw, 44px);
  align-items: center; opacity: 0; pointer-events: none;
  transition: opacity .7s cubic-bezier(.4,0,.1,1);
}
.esc__panel.on { opacity: 1; pointer-events: auto; }
.esc__panel-k { color: var(--accent-bright); }
.esc__panel-t { margin-top: 14px; font-size: clamp(26px, 3vw, 40px); }
.esc__panel-b { margin-top: 16px; max-width: 38ch; }
.esc__panel-tag { margin-top: 22px; }

/* copy slides up + in */
.esc__panel-copy > * { transform: translateY(18px); opacity: 0; transition: transform .7s cubic-bezier(.2,.7,.2,1), opacity .7s; }
.esc__panel.on .esc__panel-copy > * { transform: none; opacity: 1; }
.esc__panel.on .esc__panel-copy > *:nth-child(1) { transition-delay: .12s; }
.esc__panel.on .esc__panel-copy > *:nth-child(2) { transition-delay: .18s; }
.esc__panel.on .esc__panel-copy > *:nth-child(3) { transition-delay: .24s; }
.esc__panel.on .esc__panel-copy > *:nth-child(4) { transition-delay: .30s; }

/* photo + floating phone — modern slide: clip-wipe + Ken Burns zoom */
.esc__panel-visual { position: relative; height: 440px; overflow: visible; }
.esc__panel-photo {
  position: absolute; inset: 0; width: 100%; height: 100%;
  clip-path: inset(0 0 0 100%);
  transition: clip-path .8s cubic-bezier(.65,0,.1,1);
}
.esc__panel.on .esc__panel-photo { clip-path: inset(0 0 0 0%); }
.esc__panel-photo::part(frame) { transform: scale(1.18); transition: transform 6s ease-out; transform-origin: 60% 50%; }
.esc__panel.on .esc__panel-photo::part(frame) { transform: scale(1); }
.esc__panel-scrim {
  position: absolute; inset: 0; border-radius: 24px; pointer-events: none;
  clip-path: inset(0 0 0 100%); transition: clip-path .8s cubic-bezier(.65,0,.1,1);
  background: linear-gradient(120deg, oklch(0.12 0.02 10 / 0.12), oklch(0.12 0.02 10 / 0.5) 70%);
}
.esc__panel.on .esc__panel-scrim { clip-path: inset(0 0 0 0%); }
.esc__panel-phone {
  position: absolute; right: -4%; bottom: -6%; z-index: 2;
  filter: drop-shadow(0 34px 50px oklch(0 0 0 / 0.65));
  transform: translateX(40px) translateY(10px); opacity: 0;
  transition: transform .8s cubic-bezier(.2,.7,.2,1) .15s, opacity .8s .15s;
}
.esc__panel.on .esc__panel-phone { transform: none; opacity: 1; }

.esc__hint { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 5; font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-faint); transition: opacity .4s; }

@media (max-width: 1000px) {
  .esc { height: auto; }
  .esc__sticky { position: relative; height: auto; padding-block: 80px; }
  .esc__layout { grid-template-columns: 1fr; gap: 36px; }
  .esc__center { display: none; }
  .esc__right { min-height: 0; }
  .esc__panel { position: relative; opacity: 1; transform: none; grid-template-columns: 1fr; gap: 24px; padding: 28px 0; border-top: 1px solid var(--line-soft); }
  .esc__panel-visual { height: 360px; margin-right: 8%; }
  .esc__hint { display: none; }
}
@media (max-width: 560px) {
  .esc__panel { grid-template-columns: 1fr; }
}