:root {
  /* Charte LEXPERT-IMMO */
  --ink: #2B2F33;
  --ink-soft: #646A70;
  --line: #DADDE0;
  --bg: #FFFFFF;
  --tint: #F5F6F7;
  --accent: #C8102E;
  --accent-dark: #8E0F1E;
  --accent-soft: #FBEDEF;
  --font-display: "Barlow Semi Condensed", "Arial Narrow", system-ui, sans-serif;
  --font-body: "Barlow", system-ui, -apple-system, "Segoe UI", sans-serif;
  --radius: 10px;
  --shadow: 0 10px 30px -12px rgba(43, 47, 51, .22);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.1; letter-spacing: -.005em; margin: 0 0 .5em; text-wrap: balance; }
h1 { font-size: clamp(2.4rem, 5.4vw, 3.9rem); font-weight: 700; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
p { margin: 0 0 1em; }

.container { width: min(1160px, 100% - 32px); margin-inline: auto; }
.container--narrow { width: min(780px, 100% - 32px); }
.accent { color: var(--accent); }
.small { font-size: .875rem; color: var(--ink-soft); }

.eyebrow {
  font-size: .8rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent); margin-bottom: .75rem;
}
.eyebrow--light { color: #FF8A99; }

/* Boutons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .85rem 1.4rem; border-radius: 999px; font-weight: 600; font-size: .975rem;
  text-decoration: none; border: 1.5px solid transparent; cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .2s;
  font-family: inherit;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-dark); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.btn--ghost:hover { border-color: var(--ink); }
.btn--sm { padding: .55rem 1.1rem; font-size: .9rem; }
.btn--full { width: 100%; }

/* En-tête */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .88); backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent; transition: border-color .2s;
}
.header.is-scrolled { border-bottom-color: var(--line); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: inline-flex; align-items: center; text-decoration: none; }
.logo svg { display: block; height: 50px; width: auto; }
.logo--light svg { height: 60px; }

.nav { display: flex; align-items: center; gap: 1.75rem; }
.nav a:not(.btn) { text-decoration: none; font-size: .95rem; font-weight: 500; color: var(--ink-soft); }
.nav a:not(.btn):hover { color: var(--ink); }
.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.header__call {
  display: none; align-items: center; gap: .4rem; margin-left: auto; margin-right: .5rem;
  padding: .5rem .9rem; border-radius: 999px; background: var(--accent); color: #fff;
  text-decoration: none; font-weight: 600; font-size: .9rem;
}
.header__call svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linejoin: round; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; transition: transform .2s, opacity .2s; }

/* Hero */
.hero { padding: clamp(3rem, 8vw, 6rem) 0; background: radial-gradient(ellipse at 85% 20%, var(--accent-soft), transparent 55%); }
.hero__inner { display: grid; grid-template-columns: 1.15fr 1fr; gap: 3.5rem; align-items: center; }
.lead { font-size: 1.15rem; color: var(--ink-soft); max-width: 36rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: .75rem; margin: 2rem 0 2.5rem; }
.hero__proof { list-style: none; padding: 0; margin: 0; display: flex; gap: 2.5rem; flex-wrap: wrap; }
.hero__proof li { display: flex; flex-direction: column; }
.hero__proof strong { font-family: var(--font-display); font-size: 1.6rem; font-weight: 700; line-height: 1.2; }
.hero__proof span { font-size: .875rem; color: var(--ink-soft); }

.dpe-card {
  background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 1.75rem;
  box-shadow: var(--shadow); max-width: 440px; margin-left: auto;
}
.dpe-card__title { font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; margin-bottom: 1.25rem; }
.dpe-bars { display: flex; flex-direction: column; gap: 6px; }
.dpe-bar {
  width: var(--w); background: var(--c); color: #fff; font-family: var(--font-display); font-weight: 700; font-size: .95rem;
  padding: .35rem .75rem; border-radius: 4px 999px 999px 4px; position: relative;
  text-shadow: 0 1px 2px rgba(0,0,0,.25);
}
.dpe-bar em {
  position: absolute; left: calc(100% + 12px); top: 50%; transform: translateY(-50%);
  font-style: normal; font-size: .78rem; font-weight: 600; color: var(--ink); text-shadow: none;
  background: var(--accent-soft); padding: .2rem .55rem; border-radius: 999px; white-space: nowrap;
}
.dpe-bar.is-active { outline: 2px solid var(--ink); outline-offset: 2px; }
.dpe-card__footer { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--line); font-size: .9rem; color: var(--ink-soft); }
.check { display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; background: var(--accent); color: #fff; font-size: .75rem; margin-right: .4rem; }

/* Sections */
.section { padding: clamp(4rem, 9vw, 6.5rem) 0; }
.section--tint { background: var(--tint); }
.section--dark { background: var(--ink); color: #fff; }
.section__head { max-width: 640px; margin-bottom: 3rem; }
.section__head p:last-child { color: var(--ink-soft); }
.section--dark .section__head p:last-child { color: #C9CDD1; }

.grid { display: grid; gap: 1.25rem; }
.grid--services { grid-template-columns: repeat(3, 1fr); }
.grid--why { grid-template-columns: repeat(4, 1fr); gap: 2rem; }

.card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem;
  display: flex; flex-direction: column; transition: border-color .2s, box-shadow .2s, transform .2s;
}
.card:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-2px); }
.card__icon {
  width: 44px; height: 44px; border-radius: 12px; background: var(--accent-soft);
  display: grid; place-items: center; margin-bottom: 1rem; color: var(--accent);
}
.card__icon svg {
  width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.7;
  stroke-linecap: round; stroke-linejoin: round;
}
.card:hover .card__icon { background: var(--accent); color: #fff; }
.card p { color: var(--ink-soft); font-size: .95rem; flex: 1; }
.tag { align-self: flex-start; font-size: .78rem; font-weight: 600; color: var(--accent-dark); background: var(--accent-soft); padding: .25rem .65rem; border-radius: 999px; }

/* Travaux et professionnels */
.pro { display: grid; grid-template-columns: 1fr 1.6fr; gap: 3.5rem; align-items: start; }
.pro__intro { position: sticky; top: 100px; }
.pro__intro p { color: var(--ink-soft); }
.pro__intro .btn { margin-top: .5rem; }
.pro__list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0 2rem; }
.pro__list li { padding: 1.25rem 0 1.25rem 1rem; border-left: 3px solid var(--accent); border-bottom: 1px solid var(--line); margin-bottom: .5rem; }
.pro__list h3 { font-size: 1.15rem; margin-bottom: .3rem; }
.pro__list p { margin: 0; color: var(--ink-soft); font-size: .95rem; }

/* Outil */
.tool { display: grid; grid-template-columns: 1fr 1.3fr; gap: 3.5rem; align-items: start; }
.tool__form { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 2rem; box-shadow: var(--shadow); }
fieldset { border: 0; padding: 0; margin: 0 0 1.5rem; }
legend { font-weight: 600; font-size: .95rem; margin-bottom: .6rem; }
.choices { display: grid; grid-template-columns: repeat(2, 1fr); gap: .6rem; }
.choices--3 { grid-template-columns: repeat(3, 1fr); }
.choices label { position: relative; cursor: pointer; }
.choices input { position: absolute; opacity: 0; pointer-events: none; }
.choices span {
  display: block; text-align: center; padding: .7rem .5rem; border: 1.5px solid var(--line);
  border-radius: 10px; font-size: .9rem; font-weight: 500; transition: all .15s;
}
.choices label:hover span { border-color: var(--ink-soft); }
.choices input:checked + span { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-dark); font-weight: 600; }
.choices input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

.tool__result { border-top: 1px solid var(--line); padding-top: 1.5rem; }
.tool__result h3 { font-size: 1rem; margin-bottom: .9rem; }
.result-list { list-style: none; padding: 0; margin: 0 0 1.25rem; display: grid; gap: .5rem; }
.result-list li { display: flex; align-items: flex-start; gap: .6rem; font-size: .95rem; }
.result-list li::before {
  content: "✓"; flex: none; display: grid; place-items: center; width: 20px; height: 20px; margin-top: 2px;
  border-radius: 50%; background: var(--accent); color: #fff; font-size: .7rem; font-weight: 700;
}
.result-list li.maybe::before { content: "?"; background: #f0b40f; }
.result-list small { color: var(--ink-soft); }

/* Étapes */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; counter-reset: none; }
.step { position: relative; }
.step__num {
  display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%;
  border: 1.5px solid var(--accent); color: var(--accent); font-weight: 700; margin-bottom: 1.1rem; background: #fff;
}
.step:not(:last-child)::after {
  content: ""; position: absolute; top: 22px; left: 56px; right: -1.5rem; height: 1.5px;
  background: repeating-linear-gradient(90deg, var(--line) 0 6px, transparent 6px 12px);
}
.step p { color: var(--ink-soft); font-size: .95rem; }

/* Pourquoi */
.why { border-top: 2px solid var(--accent); padding-top: 1.25rem; }
.why p { color: #C9CDD1; font-size: .95rem; }

/* FAQ */
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; padding: 1.25rem 2.5rem 1.25rem 0; font-weight: 600; position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  font-size: 1.5rem; font-weight: 400; color: var(--accent); transition: transform .2s;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { color: var(--ink-soft); padding-bottom: 1.25rem; margin: 0; }

/* Contact */
.contact { display: grid; grid-template-columns: 1fr 1.3fr; gap: 3.5rem; align-items: start; }
.contact__info > p { color: var(--ink-soft); }
.contact__list { list-style: none; padding: 0; margin: 2rem 0 0; display: grid; gap: 1.1rem; }
.contact__list li { display: flex; flex-direction: column; font-weight: 500; }
.contact__list span { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-soft); font-weight: 600; }
.contact__list a { text-decoration: none; }
.contact__list a:hover { color: var(--accent); }

.form { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 2rem; box-shadow: var(--shadow); display: grid; gap: 1rem; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form label { display: flex; flex-direction: column; gap: .4rem; font-size: .875rem; font-weight: 600; }
.form input, .form select, .form textarea {
  font: inherit; font-weight: 400; font-size: .95rem; padding: .75rem .9rem; border: 1.5px solid var(--line);
  border-radius: 10px; background: #fff; color: var(--ink); transition: border-color .15s; width: 100%;
}
.form textarea { resize: vertical; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--accent); }
.form input.is-invalid { border-color: #d7221f; }
.form__status { margin: 0; font-size: .9rem; min-height: 1.4em; }
.form__status.is-ok { color: var(--accent-dark); }
.form__status.is-error { color: #d7221f; }

.form__hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form { position: relative; }
.form button[disabled] { opacity: .6; cursor: wait; transform: none; }
.form__legal { margin: 0; font-size: .8rem; color: var(--ink-soft); }
.form__legal a { color: var(--accent); }

/* Mentions légales */
.legal h1 { font-size: clamp(2.2rem, 4.5vw, 3.2rem); }
.legal__intro { color: var(--ink-soft); font-size: 1.1rem; }
.legal__toc { display: flex; flex-wrap: wrap; gap: .5rem; margin: 2rem 0 1rem; }
.legal__toc a {
  text-decoration: none; font-size: .9rem; font-weight: 500; padding: .35rem .8rem;
  border: 1px solid var(--line); border-radius: 999px; color: var(--ink-soft);
}
.legal__toc a:hover { border-color: var(--accent); color: var(--accent); }
.legal section { padding-top: 2.5rem; }
.legal h2 { font-size: 1.6rem; padding-bottom: .5rem; border-bottom: 2px solid var(--accent); display: inline-block; margin-bottom: 1.25rem; }
.legal p { color: var(--ink); }
.legal a { color: var(--accent); }
.legal__list { display: grid; grid-template-columns: minmax(180px, 1fr) 2fr; margin: 0 0 1rem; border-top: 1px solid var(--line); }
.legal__list dt, .legal__list dd { margin: 0; padding: .75rem 0; border-bottom: 1px solid var(--line); }
.legal__list dt { font-weight: 600; color: var(--ink-soft); padding-right: 1rem; }
.todo { background: #FFF2DC; color: #8A4F00; padding: .05rem .4rem; border-radius: 4px; font-weight: 600; font-size: .92em; }
.legal__updated { margin-top: 3rem; }

/* Page 404 */
.notfound { min-height: 100vh; display: flex; align-items: center; }
.notfound .logo { margin-bottom: 3rem; }
.notfound .lead a { color: var(--accent); }

/* Pied de page */
.footer { background: var(--ink); color: #C9CDD1; padding: 3.5rem 0 1.5rem; }
.footer__inner { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; padding-bottom: 2rem; border-bottom: 1px solid #40464C; }
.footer__address { margin: 1rem 0 0; font-style: normal; font-size: .9rem; line-height: 1.7; }
.footer__address a { text-decoration: none; }
.footer__address a:hover { color: #fff; }
.footer__nav { display: flex; gap: 1.5rem; flex-wrap: wrap; align-items: center; }
.footer__nav a { text-decoration: none; font-size: .9rem; }
.footer__nav a:hover { color: #fff; }
.footer__bottom { padding-top: 1.5rem; font-size: .85rem; }
.footer__bottom p { margin: 0; }

/* Responsive */
@media (max-width: 980px) {
  .hero__inner, .tool, .contact, .pro { grid-template-columns: 1fr; gap: 2.5rem; }
  .pro__intro { position: static; }
  .dpe-card { margin: 0; }
  .grid--services { grid-template-columns: repeat(2, 1fr); }
  .grid--why, .steps { grid-template-columns: repeat(2, 1fr); }
  .step:not(:last-child)::after { display: none; }
}
@media (max-width: 1080px) {
  .nav-toggle { display: block; }
  .header__call { display: inline-flex; }
  .nav {
    position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    gap: 0; background: #fff; border-bottom: 1px solid var(--line); padding: .5rem 16px 1.25rem;
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a:not(.btn) { padding: .85rem 0; border-bottom: 1px solid var(--line); }
  .nav .btn { margin-top: 1rem; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}
@media (max-width: 560px) {
  .grid--services, .grid--why, .steps, .form__row, .legal__list, .pro__list { grid-template-columns: 1fr; }
  .legal__list dt { border-bottom: 0; padding-bottom: 0; }
  .choices--3 { grid-template-columns: 1fr; }
  .tool__form, .form, .dpe-card { padding: 1.4rem; }
  .hero__proof { gap: 1.5rem; }
  .dpe-bar em { display: none; }
  .logo svg { height: 42px; }
  .header__call span { display: none; }
  .header__call { padding: .55rem; }
}

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.section--dark :focus-visible, .footer :focus-visible { outline-color: #fff; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}