/* Hervanium - direction artistique noir et blanc */
:root {
  --black: #0a0a0a;
  --ink: #111111;
  --grey-1: #f4f4f2;
  --grey-2: #e4e4e1;
  --grey-3: #8c8c8c;
  --grey-4: #4a4a4a;
  --white: #ffffff;
  --serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --sans: "Inter", "Segoe UI", Arial, sans-serif;
  --radius: 2px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  /* Playfair dessine des chiffres « elzéviriens » (3, 5, 9 qui descendent) : on force des chiffres alignés */
  font-variant-numeric: lining-nums;
  font-feature-settings: "lnum" 1;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; cursor: pointer; }

.wrap { width: min(1160px, 100% - 32px); margin-inline: auto; }
.narrow { width: min(760px, 100% - 32px); margin-inline: auto; }
.center { text-align: center; }
.nowrap { white-space: nowrap; }

h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: 1.15; letter-spacing: -0.01em; text-wrap: balance; }
p, li { text-wrap: pretty; }
h1 { font-size: clamp(2.5rem, 5.4vw, 4.6rem); }
h2 { font-size: clamp(1.9rem, 4vw, 3rem); margin-bottom: 24px; }
h3 { font-size: 1.4rem; margin-bottom: 12px; }
p + p { margin-top: 14px; }
em { font-style: italic; }

.kicker {
  font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--grey-3); margin-bottom: 16px;
}

/* Boutons */
.btn {
  display: inline-block; padding: 15px 28px;
  font-size: 0.85rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
  text-decoration: none; border: 1px solid transparent; border-radius: var(--radius);
  transition: background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn-light { background: var(--white); color: var(--black); }
.btn-light:hover { background: var(--grey-2); }
.btn-ghost { border-color: rgba(255,255,255,.5); color: var(--white); }
.btn-ghost:hover { border-color: var(--white); background: rgba(255,255,255,.08); }
.btn-dark { background: var(--black); color: var(--white); }
.btn-dark:hover { background: var(--grey-4); }
.btn-outline { background: transparent; border-color: var(--black); color: var(--black); }
.btn-outline:hover { background: var(--black); color: var(--white); }

/* Navigation */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 50;
  color: var(--white);
  transition: background .3s var(--ease), border-color .3s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled { background: var(--black); border-color: rgba(255,255,255,.08); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo {
  font-family: var(--serif); font-size: 1.35rem; letter-spacing: 0.22em; text-transform: uppercase;
  text-decoration: none;
}
.menu { display: flex; gap: 32px; align-items: center; }
.menu a {
  font-size: 0.8rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase;
  text-decoration: none; opacity: .8; transition: opacity .2s;
}
.menu a:hover { opacity: 1; }
.menu .menu-cta { border: 1px solid rgba(255,255,255,.6); padding: 9px 18px; opacity: 1; }
.menu .menu-cta:hover { background: var(--white); color: var(--black); }
.burger { display: none; background: none; border: 0; width: 40px; height: 40px; position: relative; color: inherit; }
.burger span { position: absolute; left: 9px; right: 9px; height: 1.5px; background: currentColor; transition: transform .3s var(--ease); }
.burger span:first-child { top: 15px; }
.burger span:last-child { top: 24px; }
.burger[aria-expanded="true"] span:first-child { transform: translateY(4.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:last-child { transform: translateY(-4.5px) rotate(-45deg); }

/* Accueil */
.hero {
  min-height: 100vh; min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  background: var(--black); color: var(--white);
  padding: 120px 0 48px;
  position: relative; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 70% 30%, #000 10%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid; grid-template-columns: 1.5fr 1fr; gap: clamp(40px, 6vw, 88px); align-items: center;
}
.hero h1 { margin-bottom: 28px; }
.rules {
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.03);
  padding: 36px 32px;
}
.rules-title {
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--grey-3); padding-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,.12);
}
.rule-item { display: grid; grid-template-columns: 44px 1fr; padding: 22px 0; border-bottom: 1px solid rgba(255,255,255,.12); }
.rule-item:last-child { border-bottom: 0; padding-bottom: 0; }
.rule-item span { font-family: var(--serif); color: var(--grey-3); font-size: 1.1rem; line-height: 1.4; }
.rule-item h3 { font-size: 1.3rem; margin-bottom: 4px; }
.rule-item p { color: #bdbdbd; font-size: 0.95rem; }
.hero h1 em { color: var(--grey-3); }
.lead { font-size: 1.15rem; max-width: 620px; color: #cfcfcf; margin-bottom: 40px; }
.actions { display: flex; flex-wrap: wrap; gap: 14px; }
.themes {
  position: relative; margin-top: 80px; padding-top: 24px;
  display: flex; flex-wrap: wrap; gap: 10px 28px;
  border-top: 1px solid rgba(255,255,255,.15);
}
.themes span { font-size: 0.78rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--grey-3); }

/* Sections */
.section { padding: clamp(80px, 11vw, 140px) 0; }
.section-head { max-width: 720px; margin-bottom: 64px; }
.section-head p:not(.kicker) { color: var(--grey-4); }
.dark { background: var(--black); color: var(--white); }
.dark .kicker { color: var(--grey-3); }
.soft { background: var(--grey-1); }
.principle { border-bottom: 1px solid var(--grey-2); }
.principle p:not(.kicker) { font-size: 1.15rem; color: var(--grey-4); }
.principle-inner { display: grid; grid-template-columns: 1.2fr 1fr; gap: clamp(40px, 7vw, 104px); align-items: center; }
.figure { border: 1px solid var(--grey-2); }
.figure-row {
  display: grid; grid-template-columns: 136px 1fr; align-items: center; column-gap: 24px;
  min-height: 112px; padding: 20px 28px; border-bottom: 1px solid var(--grey-2);
}
.figure-num {
  display: flex; align-items: baseline;
  font-family: var(--serif); font-size: 3rem; line-height: 1;
}
.unit { font-size: 0.6em; margin-left: 0.1em; color: var(--grey-3); }
.unit-x { align-self: center; font-size: 0.8em; margin: 0 0.06em 0 0; transform: translateY(0.02em); }
.figure-label { font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--grey-3); line-height: 1.5; }
.figure-label small { display: block; margin-top: 6px; font-size: 0.85rem; letter-spacing: 0.02em; text-transform: none; }
.figure-label sup { font-size: 0.7em; line-height: 0; }
.figure-total { background: var(--black); color: var(--white); border-bottom: 0; }
.figure-total .figure-label { color: #bdbdbd; }
.figure-total .unit { color: #8c8c8c; }

/* Piliers */
.grid { display: grid; gap: 1px; background: var(--grey-2); border: 1px solid var(--grey-2); }
.pillars { grid-template-columns: repeat(3, 1fr); }
/* la 7e carte occupe toute la largeur pour ne pas laisser de case vide */
.pillars .card-dark {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: 1fr 1.4fr; column-gap: 56px; align-items: start;
}
.pillars .card-dark .num { grid-column: 1 / -1; }
.pillars .card-dark h3 { grid-row: 2 / span 2; font-size: 1.8rem; }
.pillars .card-dark p:not(.action) { margin-top: 0; }
.card { background: var(--white); padding: 44px 36px; transition: background .3s var(--ease), color .3s var(--ease); }
.card:hover { background: var(--black); color: var(--white); }
.card:hover .action { border-color: rgba(255,255,255,.2); color: #cfcfcf; }
.card .num { display: block; font-family: var(--serif); font-size: 0.95rem; color: var(--grey-3); margin-bottom: 28px; }
.card p { font-size: 0.97rem; }
.card .action {
  margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--grey-2);
  font-size: 0.88rem; color: var(--grey-4); font-style: italic;
}
.card-dark { background: var(--black); color: var(--white); }
.card-dark .action { border-color: rgba(255,255,255,.2); color: #cfcfcf; }
.card-dark:hover { background: var(--grey-4); }

/* Routine */
.timeline { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; counter-reset: step; }
.timeline li { border-top: 1px solid rgba(255,255,255,.25); padding-top: 28px; position: relative; }
.timeline li::before {
  content: ""; position: absolute; top: -4px; left: 0;
  width: 9px; height: 9px; background: var(--white); border-radius: 50%;
}
.time { display: block; font-size: 0.75rem; letter-spacing: 0.24em; text-transform: uppercase; color: var(--grey-3); margin-bottom: 12px; }
.timeline p { color: #cfcfcf; font-size: 0.97rem; }

/* Conseils */
.advice {
  list-style: none; counter-reset: advice;
  display: grid; grid-template-columns: repeat(2, 1fr); column-gap: clamp(40px, 6vw, 88px);
}
.advice li {
  counter-increment: advice;
  display: grid; grid-template-columns: 56px 1fr; column-gap: 8px;
  padding: 36px 0; border-top: 1px solid #d6d6d2;
}
.advice li::before {
  content: counter(advice, decimal-leading-zero);
  grid-row: span 2;
  font-family: var(--serif); font-size: 1.5rem; line-height: 1.2; color: var(--grey-3);
}
.advice h3 { font-size: 1.3rem; margin-bottom: 10px; }
.advice p { color: var(--grey-4); font-size: 0.97rem; }

/* Deux colonnes */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 7vw, 96px); align-items: center; }

/* Citation */
.quote-section { text-align: center; border-bottom: 1px solid var(--grey-2); }
.quote blockquote { font-family: var(--serif); font-style: italic; font-size: clamp(1.5rem, 3.4vw, 2.4rem); line-height: 1.35; min-height: 3.2em; transition: opacity .35s; }
.quote figcaption { margin-top: 24px; font-size: 0.78rem; letter-spacing: 0.24em; text-transform: uppercase; color: var(--grey-3); transition: opacity .35s; }
.quote.fading blockquote, .quote.fading figcaption { opacity: 0; }
.quote-nav { display: flex; justify-content: center; gap: 12px; margin-top: 36px; }
.quote-nav button {
  width: 48px; height: 48px; display: grid; place-items: center;
  border: 1px solid var(--black); background: none; border-radius: 50%;
  font-size: 1.1rem; line-height: 1; color: var(--black); transition: background .2s, color .2s;
}
.quote-nav button:hover { background: var(--black); color: var(--white); }

/* E-book */
.ebook p:not(.kicker) { color: #cfcfcf; }
.book { display: flex; justify-content: center; perspective: 1200px; }
.book-cover {
  width: min(340px, 100%); aspect-ratio: 210 / 297;
  background: var(--black); color: var(--white);
  border: 1px solid rgba(255,255,255,.18);
  outline: 1px solid rgba(255,255,255,.6); outline-offset: -18px;
  box-shadow: 24px 30px 60px rgba(0,0,0,.6), inset 6px 0 0 rgba(255,255,255,.06);
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center;
  padding: 36px; position: relative;
  transform: rotateY(-14deg) rotateX(4deg); transition: transform .6s var(--ease);
}
.book:hover .book-cover { transform: rotateY(0) rotateX(0); }
.book-author { position: absolute; top: 44px; font-family: var(--serif); font-size: 0.72rem; letter-spacing: 0.32em; text-transform: uppercase; }
.book-kicker { font-family: var(--serif); font-style: italic; color: #bdbdbd; font-size: 1rem; }
.book-title { font-family: var(--serif); font-size: 2.1rem; line-height: 1.05; }
.book-title b { display: block; font-weight: 400; font-size: 3.6rem; letter-spacing: 0.08em; }
.book-rule { width: 40px; height: 1.5px; background: var(--white); margin: 22px 0; }
.book-foot { position: absolute; bottom: 44px; font-size: 0.6rem; letter-spacing: 0.3em; text-transform: uppercase; }
.ticks { list-style: none; margin: 24px 0 36px; }
.ticks li { padding: 10px 0 10px 30px; border-bottom: 1px solid rgba(255,255,255,.12); position: relative; color: #e6e6e6; }
.ticks li::before { content: "-"; position: absolute; left: 0; top: 10px; color: var(--grey-3); }

/* Appel final */
.final-head { margin-bottom: 64px; }
.final-head p { color: var(--grey-4); font-size: 1.1rem; }
.steps { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--grey-2); border: 1px solid var(--grey-2); }
.steps li { background: var(--white); padding: 44px 36px; }
.steps span { display: block; font-family: var(--serif); color: var(--grey-3); margin-bottom: 24px; }
.steps p { color: var(--grey-4); font-size: 0.97rem; }

/* Pied de page */
.footer { background: var(--black); color: var(--grey-3); padding: 40px 0; font-size: 0.85rem; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; }
.footer .logo { color: var(--white); font-size: 1rem; }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--white); }

/* Apparition au défilement */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { transition-duration: 0s !important; }
}

/* Tablette et mobile */
@media (max-width: 900px) {
  .timeline { grid-template-columns: 1fr; gap: 40px; }
  .two-col, .hero-inner, .principle-inner { grid-template-columns: 1fr; }
  .advice, .steps { grid-template-columns: 1fr; }
  .pillars { grid-template-columns: repeat(2, 1fr); }
  .hero { padding-bottom: 64px; }
  .ebook .book { order: -1; }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .burger { display: block; }
  .menu {
    position: fixed; inset: 72px 0 auto; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--black); padding: 8px 16px 24px;
    border-bottom: 1px solid rgba(255,255,255,.1);
    transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: opacity .25s, transform .25s, visibility .25s;
  }
  .menu.open { opacity: 1; visibility: visible; transform: none; }
  .menu a { padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
  .menu .menu-cta { margin-top: 16px; text-align: center; border-bottom: 1px solid rgba(255,255,255,.6); }
  .nav.menu-open { background: var(--black); }
  .themes { margin-top: 56px; gap: 8px 20px; }
  .advice li { grid-template-columns: 44px 1fr; padding: 28px 0; }
  .card, .steps li { padding: 36px 24px; }
  .rules { padding: 28px 22px; }
  .figure-row { grid-template-columns: 100px 1fr; column-gap: 16px; min-height: 96px; padding: 18px 20px; }
  .figure-num { font-size: 2.5rem; }
  .actions .btn { flex: 1 1 100%; text-align: center; }
}
@media (max-width: 600px) {
  .pillars { grid-template-columns: 1fr; }
  .pillars .card-dark { display: block; }
  .pillars .card-dark h3 { font-size: 1.4rem; }
}