/* ============================================================
   RiXPer — Protection Passive Incendie
   Design system : industriel / technique / "feu maîtrisé"
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Archivo:ital,wght@0,400;0,500;0,600;0,700;0,800;0,900;1,600&family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  /* Palette */
  --ink:        #0b0c0f;
  --ink-2:      #121419;
  --char:       #181b22;
  --char-2:     #20242d;
  --line:       #2b303b;
  --steel:      #8a93a3;
  --steel-2:    #5c6573;
  --paper:      #f3f1ec;
  --paper-dim:  #cfd2d6;
  --white:      #ffffff;

  --ember:      #f1531a;
  --ember-2:    #ff6a2c;
  --ember-deep: #b8390f;
  --ember-glow: rgba(241, 83, 26, 0.18);

  /* Type */
  --display: 'Archivo', sans-serif;
  --body:    'IBM Plex Sans', sans-serif;
  --mono:    'IBM Plex Mono', monospace;

  /* Layout */
  --container: 1240px;
  --gutter: clamp(20px, 5vw, 64px);
  --radius: 2px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--body);
  background: var(--ink);
  color: var(--paper);
  line-height: 1.6;
  font-weight: 400;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Grain / atmosphere overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

::selection { background: var(--ember); color: var(--ink); }

/* ---------- Utilities ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { position: relative; z-index: 2; padding-block: clamp(72px, 11vw, 148px); }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ember);
  display: inline-flex;
  align-items: center;
  gap: 0.9em;
}
.eyebrow::before {
  content: "";
  width: 28px; height: 1px;
  background: var(--ember);
  display: inline-block;
}

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.h-xl { font-size: clamp(2.7rem, 8vw, 6.4rem); font-weight: 900; text-transform: uppercase; }
.h-lg { font-size: clamp(2rem, 5.5vw, 4rem); text-transform: uppercase; }
.h-md { font-size: clamp(1.5rem, 3vw, 2.4rem); }

.lede { font-size: clamp(1.05rem, 1.6vw, 1.3rem); color: var(--paper-dim); max-width: 60ch; font-weight: 300; }

.text-ember { color: var(--ember); }
.text-steel { color: var(--steel); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 1.05em 1.7em;
  border: 1px solid var(--ember);
  border-radius: var(--radius);
  background: var(--ember);
  color: var(--ink);
  cursor: pointer;
  transition: all 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}
.btn .arr { transition: transform 0.4s var(--ease); }
.btn:hover { background: var(--ember-2); border-color: var(--ember-2); box-shadow: 0 0 0 4px var(--ember-glow); }
.btn:hover .arr { transform: translateX(5px); }

.btn--ghost { background: transparent; color: var(--paper); border-color: var(--line); }
.btn--ghost:hover { background: transparent; border-color: var(--ember); color: var(--ember); box-shadow: none; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(11, 12, 15, 0.82);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}
.brand { display: flex; align-items: center; gap: 0.7rem; z-index: 110; }
.brand__mark { width: 34px; height: 34px; flex: none; }
.brand__name {
  font-family: var(--display);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
  text-transform: lowercase;
}
.brand__name b { color: var(--ember); font-weight: 900; }

.nav__links { display: flex; align-items: center; gap: 2.1rem; }
.nav__links a {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper-dim);
  position: relative;
  padding-block: 0.4rem;
  transition: color 0.3s;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 1px; background: var(--ember); transition: width 0.35s var(--ease);
}
.nav__links a:hover, .nav__links a[aria-current="page"] { color: var(--paper); }
.nav__links a:hover::after, .nav__links a[aria-current="page"]::after { width: 100%; }

/* dropdown */
.has-sub { position: relative; }
.subnav {
  position: absolute;
  top: 100%; left: -1rem;
  min-width: 290px;
  background: var(--char);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.5rem;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: all 0.3s var(--ease);
  box-shadow: 0 30px 60px rgba(0,0,0,0.5);
}
.has-sub:hover .subnav { opacity: 1; visibility: visible; transform: translateY(0); }
.subnav a {
  display: block; padding: 0.8rem 0.9rem; text-transform: none; letter-spacing: 0.02em;
  font-size: 0.82rem; border-radius: var(--radius);
}
.subnav a::after { display: none; }
.subnav a:hover { background: var(--char-2); color: var(--ember); }

.nav__cta { display: inline-flex; }
.nav__links > .btn { display: none; } /* visible uniquement dans le menu mobile */

.burger {
  display: none; flex-direction: column; gap: 5px; width: 30px; height: 30px;
  justify-content: center; background: none; border: none; cursor: pointer; z-index: 110;
}
.burger span { height: 2px; width: 100%; background: var(--paper); transition: all 0.35s var(--ease); }
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  padding-top: 78px;
  overflow: hidden;
  z-index: 2;
}
.hero__bg {
  position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(120% 90% at 80% 0%, rgba(241,83,26,0.16), transparent 55%),
    radial-gradient(80% 60% at 0% 100%, rgba(20,24,32,0.9), transparent 60%),
    linear-gradient(180deg, var(--ink-2), var(--ink));
}
.hero__grid {
  position: absolute; inset: 0; z-index: -1; opacity: 0.5;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: clamp(60px, 9vw, 120px) clamp(60px, 9vw, 120px);
  mask-image: radial-gradient(120% 120% at 50% 30%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(120% 120% at 50% 30%, #000 30%, transparent 80%);
}
.hero__ember {
  position: absolute; z-index: -1; right: -8vw; top: 8%;
  width: 46vw; max-width: 640px; aspect-ratio: 1;
  background: radial-gradient(circle, var(--ember-glow), transparent 65%);
  filter: blur(20px);
  animation: pulse 7s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 0.7; transform: scale(1); } 50% { opacity: 1; transform: scale(1.08); } }

.hero__inner { padding-bottom: clamp(48px, 8vw, 110px); width: 100%; }
.hero__tag { margin-bottom: 1.8rem; }
.hero h1 { margin-bottom: 1.6rem; }
.hero h1 .line { display: block; overflow: hidden; }
.hero h1 .line span { display: block; }
.hero__sub {
  display: flex; flex-wrap: wrap; gap: 1.2rem 2.5rem; align-items: center;
  margin-bottom: 2.6rem; max-width: 720px;
}
.hero__pill {
  font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--paper); display: flex; align-items: center; gap: 0.6rem;
}
.hero__pill::before { content: ""; width: 7px; height: 7px; background: var(--ember); border-radius: 50%; flex: none; box-shadow: 0 0 10px var(--ember); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }

.hero__meta {
  position: absolute; right: var(--gutter); bottom: clamp(48px,8vw,110px);
  text-align: right; font-family: var(--mono); font-size: 0.72rem; color: var(--steel-2);
  letter-spacing: 0.1em; line-height: 1.8;
}
.hero__meta b { color: var(--paper); font-weight: 500; }

/* ============================================================
   MARQUEE
   ============================================================ */
.marquee {
  position: relative; z-index: 2;
  border-block: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden; padding-block: 1.1rem;
}
.marquee__track { display: flex; gap: 3rem; white-space: nowrap; width: max-content; animation: scroll 32s linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__item { font-family: var(--display); font-weight: 700; text-transform: uppercase; font-size: 1.05rem; letter-spacing: 0.02em; color: var(--steel); display: flex; align-items: center; gap: 3rem; }
.marquee__item::after { content: "✦"; color: var(--ember); font-size: 0.7rem; }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ============================================================
   GENERIC PAGE HEADER (interior pages)
   ============================================================ */
.page-hero {
  position: relative; z-index: 2;
  padding-top: calc(78px + clamp(60px, 11vw, 130px));
  padding-bottom: clamp(40px, 7vw, 80px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.page-hero__bg {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(80% 120% at 90% -10%, rgba(241,83,26,0.13), transparent 50%),
    linear-gradient(180deg, var(--ink-2), var(--ink));
}
.page-hero__index { font-family: var(--mono); color: var(--ember); font-size: 0.8rem; letter-spacing: 0.2em; }
.page-hero h1 { margin-block: 1rem 0.4rem; }
.crumbs { font-family: var(--mono); font-size: 0.72rem; color: var(--steel-2); letter-spacing: 0.08em; margin-top: 1.4rem; }
.crumbs a:hover { color: var(--ember); }

/* ============================================================
   SECTION HEADER
   ============================================================ */
.sec-head { display: grid; grid-template-columns: 1fr; gap: 1.2rem; margin-bottom: clamp(3rem, 6vw, 5rem); max-width: 900px; }
.sec-head .lede { margin-top: 0.5rem; }

/* ============================================================
   ABOUT / INTRO SPLIT
   ============================================================ */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2.5rem, 6vw, 6rem); align-items: center; }
.split--narrow { grid-template-columns: 0.9fr 1.1fr; }
.split__media { position: relative; }
.frame {
  position: relative; aspect-ratio: 4/5; border: 1px solid var(--line);
  background: linear-gradient(145deg, var(--char), var(--ink-2)); overflow: hidden;
}
.frame::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 40px 40px; opacity: 0.35;
}
.frame__flame {
  position: absolute; inset: 0; margin: auto; width: 55%;
  filter: drop-shadow(0 12px 40px var(--ember-glow));
}
.frame__tag {
  position: absolute; left: 0; bottom: 0; background: var(--ember); color: var(--ink);
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.7rem 1rem; font-weight: 600;
}
.prose p { color: var(--paper-dim); margin-bottom: 1.3rem; font-weight: 300; font-size: 1.05rem; }
.prose p strong { color: var(--paper); font-weight: 600; }
.signature { font-family: var(--display); font-style: italic; font-weight: 600; color: var(--paper); margin-top: 1.5rem; }
.signature span { display: block; font-family: var(--mono); font-style: normal; font-size: 0.74rem; color: var(--steel); letter-spacing: 0.1em; text-transform: uppercase; margin-top: 0.3rem; }

/* ============================================================
   STATS
   ============================================================ */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.stat { background: var(--ink); padding: clamp(1.6rem, 3vw, 2.6rem); }
.stat__num { font-family: var(--display); font-weight: 900; font-size: clamp(2.4rem, 5vw, 3.6rem); color: var(--ember); line-height: 1; letter-spacing: -0.03em; }
.stat__label { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--steel); margin-top: 0.7rem; }

/* ============================================================
   SERVICE CARDS
   ============================================================ */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.cards--2 { grid-template-columns: repeat(2, 1fr); }
.card {
  position: relative; background: var(--char); border: 1px solid var(--line);
  padding: clamp(1.8rem, 3vw, 2.6rem); border-radius: var(--radius);
  transition: transform 0.5s var(--ease), border-color 0.5s var(--ease), background 0.5s;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; left: 0; top: 0; height: 100%; width: 3px; background: var(--ember);
  transform: scaleY(0); transform-origin: bottom; transition: transform 0.5s var(--ease);
}
.card:hover { transform: translateY(-6px); border-color: var(--steel-2); background: var(--char-2); }
.card:hover::before { transform: scaleY(1); }
.card__no { font-family: var(--mono); font-size: 0.78rem; color: var(--ember); letter-spacing: 0.15em; }
.card__icon { width: 44px; height: 44px; margin-block: 1.3rem 1.1rem; color: var(--ember); }
.card h3 { font-size: 1.35rem; margin-bottom: 0.9rem; letter-spacing: -0.01em; font-weight: 700; text-transform: none; }
.card ul { display: flex; flex-direction: column; gap: 0.55rem; margin-top: 1rem; }
.card li { position: relative; padding-left: 1.2rem; color: var(--paper-dim); font-size: 0.94rem; font-weight: 300; }
.card li::before { content: ""; position: absolute; left: 0; top: 0.6em; width: 6px; height: 6px; background: var(--ember); }
.card p { color: var(--paper-dim); font-weight: 300; }

/* ============================================================
   FEATURE LIST (services detail)
   ============================================================ */
.flist { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.flist__item {
  background: var(--ink); padding: clamp(1.5rem, 3vw, 2.2rem) clamp(1.5rem, 3vw, 2.4rem);
  display: grid; grid-template-columns: auto 1fr; gap: 1.5rem; align-items: start;
  transition: background 0.4s var(--ease);
}
.flist__item:hover { background: var(--char); }
.flist__no { font-family: var(--mono); color: var(--ember); font-size: 0.9rem; font-weight: 600; letter-spacing: 0.1em; padding-top: 0.2rem; }
.flist__body h3 { font-size: 1.2rem; text-transform: none; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 0.4rem; }
.flist__body p { color: var(--paper-dim); font-weight: 300; font-size: 0.98rem; }

/* audience tabs / chips */
.chips { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.8rem; }
.chip {
  font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 0.6rem 1.1rem; border: 1px solid var(--line); border-radius: 100px; color: var(--paper-dim);
}
.chip b { color: var(--ember); }

/* ============================================================
   CTA BAND
   ============================================================ */
.cta {
  position: relative; z-index: 2; overflow: hidden;
  background: var(--ink-2); border-block: 1px solid var(--line);
}
.cta__bg { position: absolute; inset: 0; z-index: -1; background: radial-gradient(60% 130% at 80% 50%, var(--ember-glow), transparent 60%); }
.cta__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 2rem; padding-block: clamp(3rem, 6vw, 5rem); }
.cta h2 { max-width: 18ch; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: clamp(2.5rem, 6vw, 5rem); }
.contact-info { display: flex; flex-direction: column; gap: 2rem; }
.info-block { border-top: 1px solid var(--line); padding-top: 1.4rem; }
.info-block__label { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--steel); margin-bottom: 0.5rem; }
.info-block__value { font-size: 1.15rem; font-weight: 500; }
.info-block__value a:hover { color: var(--ember); }

.form { display: grid; gap: 1.3rem; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.3rem; }
.field { display: flex; flex-direction: column; gap: 0.5rem; }
.field label { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--steel); }
.field input, .field textarea, .field select {
  font-family: var(--body); font-size: 1rem; color: var(--paper);
  background: var(--char); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0.95rem 1.1rem; transition: border-color 0.3s, box-shadow 0.3s; resize: vertical;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--ember); box-shadow: 0 0 0 3px var(--ember-glow);
}
.field input::placeholder, .field textarea::placeholder { color: var(--steel-2); }
.form__note { font-family: var(--mono); font-size: 0.72rem; color: var(--steel-2); letter-spacing: 0.03em; }
.form__status { font-family: var(--mono); font-size: 0.84rem; padding: 0.9rem 1.1rem; border-radius: var(--radius); display: none; }
.form__status.ok { display: block; background: rgba(40,180,99,0.12); border: 1px solid rgba(40,180,99,0.4); color: #6fe39a; }
.form__status.err { display: block; background: rgba(241,83,26,0.12); border: 1px solid rgba(241,83,26,0.4); color: var(--ember-2); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { position: relative; z-index: 2; background: var(--ink-2); border-top: 1px solid var(--line); padding-block: clamp(3.5rem, 6vw, 5rem) 2rem; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2.5rem; padding-bottom: 3rem; border-bottom: 1px solid var(--line); }
.footer-brand .brand { margin-bottom: 1.3rem; }
.footer-brand p { color: var(--steel); font-weight: 300; max-width: 34ch; font-size: 0.96rem; }
.footer-col h4 { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--steel); font-weight: 500; margin-bottom: 1.2rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.7rem; }
.footer-col a { color: var(--paper-dim); font-size: 0.95rem; transition: color 0.3s; }
.footer-col a:hover { color: var(--ember); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; padding-top: 2rem; }
.footer-bottom p { font-family: var(--mono); font-size: 0.72rem; color: var(--steel-2); letter-spacing: 0.05em; }

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }
.reveal[data-delay="5"] { transition-delay: 0.40s; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1080px) {
  .cards, .cards--2 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .nav__links, .nav__cta { display: none; }
  .burger { display: flex; }

  .nav__links.mobile {
    display: flex; position: fixed; inset: 78px 0 0 0;
    flex-direction: column; align-items: flex-start; justify-content: flex-start;
    gap: 0.4rem; padding: 2rem var(--gutter); background: var(--ink);
    border-top: 1px solid var(--line); overflow-y: auto;
    transform: translateX(100%); transition: transform 0.45s var(--ease);
  }
  .nav__links.mobile.open { transform: translateX(0); }
  .nav__links.mobile a { font-size: 1.1rem; padding-block: 0.8rem; width: 100%; border-bottom: 1px solid var(--line); }
  .nav__links.mobile .subnav { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; background: transparent; padding: 0 0 0 1rem; min-width: 0; }
  .nav__links.mobile .subnav a { font-size: 0.95rem; color: var(--steel); border: none; }
  .nav__links.mobile .btn { display: inline-flex; margin-top: 1rem; }

  .split, .split--narrow, .contact-grid { grid-template-columns: 1fr; }
  .split__media { order: -1; max-width: 420px; }
  .hero__meta { display: none; }
}

@media (max-width: 560px) {
  .cards, .cards--2, .stats { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .flist__item { grid-template-columns: 1fr; gap: 0.5rem; }
}