/* =========================================================
   SACHEDA CONSTRUCTION — Feuille de style
   Palette : jaune chantier / noir anthracite / gris béton
   ========================================================= */

/* ---------- Variables ---------- */
:root {
    --color-primary: #f5b301;        /* jaune chantier */
    --color-primary-dark: #d49b00;
    --color-dark: #1a1d23;           /* anthracite */
    --color-dark-2: #24282f;
    --color-text: #2b2f36;
    --color-muted: #6b7280;
    --color-bg: #ffffff;
    --color-bg-alt: #f4f5f7;         /* gris béton clair */
    --color-border: #e5e7eb;
    --color-white: #ffffff;

    --font-head: 'Barlow Condensed', sans-serif;
    --font-body: 'Inter', sans-serif;

    --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
    --shadow-md: 0 8px 24px rgba(0,0,0,.10);
    --shadow-lg: 0 20px 50px rgba(0,0,0,.15);

    --radius: 6px;
    --radius-lg: 14px;
    --container: 1200px;
    --header-h: 76px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
svg { display: block; }

/* ---------- Layout ---------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: 24px;
}

.section { padding: 96px 0; }
.section--alt { background: var(--color-bg-alt); }
.section--dark { background: var(--color-dark); color: var(--color-white); }

.section__head {
    max-width: 720px;
    margin: 0 auto 56px;
    text-align: center;
}
.section__head--light .section__eyebrow { color: var(--color-primary); }
.section__head--light .section__title { color: var(--color-white); }

.section__eyebrow {
    display: inline-block;
    font-family: var(--font-head);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.95rem;
    color: var(--color-primary-dark);
    margin-bottom: 12px;
    position: relative;
    padding-left: 44px;
}
.section__eyebrow::before {
    content: '';
    position: absolute;
    left: 0; top: 50%;
    width: 34px; height: 2px;
    background: var(--color-primary);
    transform: translateY(-50%);
}
.section__head--light .section__eyebrow { padding-left: 0; }
.section__head--light .section__eyebrow::before { display: none; }

.section__title {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.1;
    letter-spacing: 0.5px;
    color: var(--color-dark);
    text-transform: uppercase;
}
.section__intro {
    margin-top: 16px;
    color: var(--color-muted);
    font-size: 1.05rem;
}

/* ---------- Boutons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 30px;
    font-family: var(--font-head);
    font-weight: 600;
    font-size: 1.05rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    border-radius: var(--radius);
    transition: all .25s ease;
    cursor: pointer;
}
.btn--primary { background: var(--color-primary); color: var(--color-dark); }
.btn--primary:hover { background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; color: var(--color-white); border: 2px solid rgba(255,255,255,.4); }
.btn--ghost:hover { background: var(--color-white); color: var(--color-dark); border-color: var(--color-white); }
.btn--light { background: var(--color-white); color: var(--color-dark); }
.btn--light:hover { background: var(--color-primary); transform: translateY(-2px); }
.btn--block { width: 100%; }

/* ---------- Logo ---------- */
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--color-dark);
}
.logo__mark { color: var(--color-primary); display: flex; }
.logo__text { display: flex; flex-direction: column; line-height: 1; }
.logo__text strong {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: 1.5px;
}
.logo__text small {
    font-family: var(--font-head);
    font-weight: 500;
    font-size: 0.7rem;
    letter-spacing: 4px;
    color: var(--color-muted);
}
.logo--light { color: var(--color-white); }
.logo--light .logo__text small { color: rgba(255,255,255,.6); }

/* ---------- Header ---------- */
.header {
    position: fixed;
    inset: 0 0 auto 0;
    height: var(--header-h);
    z-index: 100;
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: all .3s ease;
}
.header.scrolled {
    height: 64px;
    box-shadow: var(--shadow-sm);
    border-bottom-color: var(--color-border);
}
.header__inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav__list {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav__link {
    font-family: var(--font-head);
    font-weight: 500;
    font-size: 1.05rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 10px 16px;
    border-radius: var(--radius);
    transition: color .2s ease;
    position: relative;
}
.nav__link:hover { color: var(--color-primary-dark); }
.nav__link--cta {
    background: var(--color-primary);
    color: var(--color-dark);
    font-weight: 600;
}
.nav__link--cta:hover { background: var(--color-primary-dark); color: var(--color-dark); }

.nav__burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}
.nav__burger span {
    width: 26px; height: 3px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: all .3s ease;
}
.nav__close { display: none; padding: 8px; color: var(--color-dark); }

/* ---------- Héros ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-h);
    background:
        linear-gradient(135deg, rgba(26,29,35,.92) 0%, rgba(26,29,35,.7) 60%, rgba(245,179,1,.55) 100%),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1200' height='800' viewBox='0 0 1200 800'%3E%3Crect width='1200' height='800' fill='%23333'/%3E%3Cpath d='M0 500 Q300 420 600 480 T1200 460 L1200 800 L0 800 Z' fill='%23222'/%3E%3Cpath d='M0 560 Q300 480 600 540 T1200 520 L1200 800 L0 800 Z' fill='%23111'/%3E%3Ccircle cx='950' cy='180' r='80' fill='%23f5b301' opacity='.15'/%3E%3C/svg%3E");
    background-size: cover;
    background-position: center;
    color: var(--color-white);
    overflow: hidden;
}
.hero__content { position: relative; z-index: 2; padding-block: 80px; }
.hero__eyebrow {
    font-family: var(--font-head);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 4px;
    font-size: 1rem;
    color: var(--color-primary);
    margin-bottom: 20px;
}
.hero__title {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: clamp(2.5rem, 6vw, 4.8rem);
    line-height: 1.02;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 24px;
}
.hero__title span {
    color: var(--color-primary);
    position: relative;
    white-space: nowrap;
}
.hero__title span::after {
    content: '';
    position: absolute;
    left: 0; bottom: -4px;
    width: 100%; height: 4px;
    background: var(--color-primary);
}
.hero__lead {
    max-width: 580px;
    font-size: 1.15rem;
    color: rgba(255,255,255,.85);
    margin-bottom: 36px;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 64px; }

.hero__stats {
    display: flex;
    flex-wrap: wrap;
    gap: 48px;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,.15);
}
.hero__stats li { display: flex; flex-direction: column; }
.hero__stats strong {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: clamp(2.2rem, 4vw, 3rem);
    color: var(--color-primary);
    line-height: 1;
}
.hero__stats span {
    font-size: 0.9rem;
    color: rgba(255,255,255,.7);
    margin-top: 6px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero__scroll {
    position: absolute;
    bottom: 30px; left: 50%;
    transform: translateX(-50%);
    width: 26px; height: 44px;
    border: 2px solid rgba(255,255,255,.4);
    border-radius: 14px;
    z-index: 2;
}
.hero__scroll span {
    position: absolute;
    top: 8px; left: 50%;
    transform: translateX(-50%);
    width: 4px; height: 8px;
    background: var(--color-white);
    border-radius: 2px;
    animation: scrollDown 1.8s infinite;
}
@keyframes scrollDown {
    0% { opacity: 0; transform: translate(-50%, 0); }
    40% { opacity: 1; }
    100% { opacity: 0; transform: translate(-50%, 16px); }
}

/* ---------- Bandeau confiance ---------- */
.trust { background: var(--color-dark); padding: 24px 0; }
.trust__inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    gap: 24px;
}
.trust__item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-white);
    font-family: var(--font-head);
    font-weight: 500;
    font-size: 1.05rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}
.trust__item svg { color: var(--color-primary); }

/* ---------- Services ---------- */
.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
}
.service-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    transition: all .3s ease;
    position: relative;
    overflow: hidden;
}
.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 4px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .35s ease;
}
.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.service-card:hover::before { transform: scaleX(1); }
.service-card__icon {
    width: 64px; height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-alt);
    color: var(--color-primary-dark);
    border-radius: 12px;
    margin-bottom: 22px;
    transition: all .3s ease;
}
.service-card:hover .service-card__icon {
    background: var(--color-primary);
    color: var(--color-dark);
}
.service-card h3 {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-dark);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.service-card > p { color: var(--color-muted); margin-bottom: 18px; }
.service-card ul { display: flex; flex-direction: column; gap: 8px; }
.service-card ul li {
    position: relative;
    padding-left: 22px;
    font-size: 0.95rem;
    color: var(--color-text);
}
.service-card ul li::before {
    content: '';
    position: absolute;
    left: 0; top: 50%;
    transform: translateY(-50%);
    width: 8px; height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
}

/* ---------- À propos ---------- */
.about__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}
.about__media { position: relative; }
.about__media-frame {
    aspect-ratio: 4/5;
    border-radius: var(--radius-lg);
    background:
        linear-gradient(160deg, rgba(245,179,1,.2), rgba(26,29,35,.6)),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='600' height='750' viewBox='0 0 600 750'%3E%3Crect width='600' height='750' fill='%233a3d44'/%3E%3Crect x='60' y='200' width='120' height='400' fill='%23282b30'/%3E%3Crect x='220' y='150' width='120' height='450' fill='%23282b30'/%3E%3Crect x='380' y='250' width='120' height='350' fill='%23282b30'/%3E%3Cpath d='M0 600 L600 600 L600 750 L0 750 Z' fill='%231f2227'/%3E%3Crect x='80' y='620' width='40' height='40' fill='%23f5b301' opacity='.4'/%3E%3Crect x='240' y='620' width='40' height='40' fill='%23f5b301' opacity='.4'/%3E%3Crect x='400' y='620' width='40' height='40' fill='%23f5b301' opacity='.4'/%3E%3C/svg%3E");
    background-size: cover;
    background-position: center;
}
.about__media-tag {
    position: absolute;
    top: 24px; left: 24px;
    background: var(--color-primary);
    color: var(--color-dark);
    font-family: var(--font-head);
    font-weight: 700;
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 0.95rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}
.about__badge {
    position: absolute;
    bottom: -24px; right: -24px;
    background: var(--color-dark);
    color: var(--color-white);
    padding: 24px 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}
.about__badge strong {
    display: block;
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 2.8rem;
    color: var(--color-primary);
    line-height: 1;
}
.about__badge span {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255,255,255,.7);
}
.about__content .section__eyebrow { padding-left: 44px; }
.about__content > p { margin-bottom: 16px; color: var(--color-muted); }
.about__list {
    margin: 28px 0 32px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.about__list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
}
.about__list svg {
    flex-shrink: 0;
    color: var(--color-primary);
    background: var(--color-bg-alt);
    padding: 4px;
    border-radius: 50%;
}

/* ---------- Réalisations ---------- */
.works__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}
.work-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all .35s ease;
}
.work-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.work-card__img {
    aspect-ratio: 4/3;
    position: relative;
    background-size: cover;
    background-position: center;
}
.work-card__img--1 {
    background:
        linear-gradient(160deg, rgba(245,179,1,.25), rgba(26,29,35,.55)),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='300' viewBox='0 0 400 300'%3E%3Crect width='400' height='300' fill='%23555'/%3E%3Cpath d='M0 200 L400 180 L400 300 L0 300 Z' fill='%23333'/%3E%3Cpath d='M0 200 L400 180' stroke='%23f5b301' stroke-width='4' fill='none'/%3E%3Cpath d='M50 195 L50 250 M150 190 L150 250 M250 185 L250 250 M350 180 L350 250' stroke='%23ddd' stroke-width='3'/%3E%3C/svg%3E");
}
.work-card__img--2 {
    background:
        linear-gradient(160deg, rgba(245,179,1,.25), rgba(26,29,35,.55)),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='300' viewBox='0 0 400 300'%3E%3Crect width='400' height='300' fill='%23444'/%3E%3Crect x='40' y='60' width='80' height='160' fill='%23555'/%3E%3Crect x='160' y='60' width='80' height='160' fill='%23555'/%3E%3Crect x='280' y='60' width='80' height='160' fill='%23555'/%3E%3Crect x='0' y='220' width='400' height='40' fill='%23333'/%3E%3Cpath d='M0 240 L400 240' stroke='%23f5b301' stroke-width='3'/%3E%3C/svg%3E");
}
.work-card__img--3 {
    background:
        linear-gradient(160deg, rgba(245,179,1,.25), rgba(26,29,35,.55)),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='300' viewBox='0 0 400 300'%3E%3Crect width='400' height='300' fill='%236b5a3e'/%3E%3Cpath d='M0 220 Q100 180 200 210 T400 200 L400 300 L0 300 Z' fill='%23554a35'/%3E%3Cpath d='M0 230 Q100 190 200 220 T400 210 L400 300 L0 300 Z' fill='%23393020'/%3E%3Ccircle cx='320' cy='80' r='30' fill='%23f5b301' opacity='.3'/%3E%3C/svg%3E");
}
.work-card__img--4 {
    background:
        linear-gradient(160deg, rgba(245,179,1,.25), rgba(26,29,35,.55)),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='300' viewBox='0 0 400 300'%3E%3Crect width='400' height='300' fill='%234a6171'/%3E%3Cpath d='M0 180 Q200 120 400 180 L400 220 L0 220 Z' fill='%235a7a8c'/%3E%3Crect x='0' y='180' width='400' height='40' fill='%23333' opacity='.4'/%3E%3Cpath d='M0 220 L400 220' stroke='%23f5b301' stroke-width='3'/%3E%3C/svg%3E");
}
.work-card__cat {
    position: absolute;
    top: 16px; left: 16px;
    background: var(--color-primary);
    color: var(--color-dark);
    font-family: var(--font-head);
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}
.work-card__body { padding: 24px; }
.work-card__body h3 {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.35rem;
    color: var(--color-dark);
    margin-bottom: 8px;
    text-transform: uppercase;
}
.work-card__body p { color: var(--color-muted); font-size: 0.95rem; }

/* ---------- Avantages (dark) ---------- */
.advantages__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 32px;
}
.advantage {
    padding: 32px 24px;
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius-lg);
    background: rgba(255,255,255,.03);
    transition: all .3s ease;
}
.advantage:hover {
    background: rgba(245,179,1,.08);
    border-color: var(--color-primary);
    transform: translateY(-4px);
}
.advantage__num {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 2.5rem;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 16px;
}
.advantage h3 {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.3rem;
    margin-bottom: 10px;
    text-transform: uppercase;
}
.advantage p { color: rgba(255,255,255,.7); font-size: 0.95rem; }

/* ---------- Contact ---------- */
.contact__inner {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 64px;
    align-items: start;
}
.contact__lead { color: var(--color-muted); margin: 16px 0 32px; max-width: 460px; }
.contact__list { display: flex; flex-direction: column; gap: 22px; }
.contact__list li { display: flex; gap: 16px; align-items: flex-start; }
.contact__icon {
    flex-shrink: 0;
    width: 48px; height: 48px;
    display: flex; align-items: center; justify-content: center;
    background: var(--color-bg-alt);
    color: var(--color-primary-dark);
    border-radius: 12px;
}
.contact__list strong {
    display: block;
    font-family: var(--font-head);
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--color-dark);
    margin-bottom: 2px;
}
.contact__list span { color: var(--color-muted); font-size: 0.95rem; }

.contact__form {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-md);
}
.contact__form h3 {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.6rem;
    color: var(--color-dark);
    margin-bottom: 24px;
    text-transform: uppercase;
}
.field { margin-bottom: 18px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-dark);
    margin-bottom: 6px;
}
.field input,
.field select,
.field textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-bg);
    transition: border-color .2s ease, box-shadow .2s ease;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(245,179,1,.18);
}
.field textarea { resize: vertical; }
.form-feedback {
    margin-top: 14px;
    font-size: 0.95rem;
    text-align: center;
    min-height: 22px;
}
.form-feedback.success { color: #2e7d32; font-weight: 600; }
.form-feedback.error { color: #c62828; font-weight: 600; }

/* ---------- CTA band ---------- */
.cta-band {
    background:
        linear-gradient(105deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: 56px 0;
}
.cta-band__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
}
.cta-band h2 {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    color: var(--color-dark);
    text-transform: uppercase;
}
.cta-band p { color: rgba(26,29,35,.75); margin-top: 4px; }

/* ---------- Footer ---------- */
.footer { background: var(--color-dark); color: rgba(255,255,255,.7); padding-top: 64px; }
.footer__inner {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 48px;
}
.footer__col--brand p { margin-top: 18px; font-size: 0.95rem; max-width: 300px; }
.footer__col h4 {
    font-family: var(--font-head);
    font-weight: 600;
    color: var(--color-white);
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 18px;
}
.footer__col ul { display: flex; flex-direction: column; gap: 10px; }
.footer__col a, .footer__col li { font-size: 0.95rem; transition: color .2s ease; }
.footer__col a:hover { color: var(--color-primary); }
.footer__bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 20px 0; }
.footer__bottom-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 0.88rem;
}

/* ---------- Bouton retour haut ---------- */
.to-top {
    position: fixed;
    bottom: 28px; right: 28px;
    width: 48px; height: 48px;
    background: var(--color-primary);
    color: var(--color-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all .3s ease;
    z-index: 90;
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--color-primary-dark); }

/* ---------- Animations reveal ---------- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
    .about__inner,
    .contact__inner { grid-template-columns: 1fr; gap: 48px; }
    .footer__inner { grid-template-columns: 1fr 1fr; }
    .about__badge { right: 24px; }
}

@media (max-width: 820px) {
    .nav__burger { display: flex; }
    .nav__close { display: block; position: absolute; top: 20px; right: 20px; }
    .nav {
        position: fixed;
        top: 0; right: -100%;
        width: 80%;
        max-width: 340px;
        height: 100vh;
        background: var(--color-white);
        box-shadow: var(--shadow-lg);
        padding: 80px 30px 30px;
        transition: right .35s ease;
        z-index: 110;
    }
    .nav.open { right: 0; }
    .nav__list { flex-direction: column; align-items: stretch; gap: 8px; }
    .nav__link { display: block; padding: 14px 16px; font-size: 1.15rem; border-bottom: 1px solid var(--color-border); border-radius: 0; }
    .nav__link--cta { border-bottom: none; border-radius: var(--radius); margin-top: 10px; text-align: center; }

    .hero__stats { gap: 28px; }
}

@media (max-width: 560px) {
    .section { padding: 64px 0; }
    .container { padding-inline: 18px; }
    .field-row { grid-template-columns: 1fr; }
    .footer__inner { grid-template-columns: 1fr; }
    .footer__bottom-inner { justify-content: center; text-align: center; }
    .contact__form { padding: 24px; }
    .hero__actions { flex-direction: column; align-items: stretch; }
    .hero__actions .btn { width: 100%; }
    .cta-band__inner { flex-direction: column; text-align: center; }
    .to-top { bottom: 18px; right: 18px; }
}

/* ---------- Overlay mobile (quand nav ouvert) ---------- */
body.nav-open::after {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 105;
}