:root {
    --bg-main: #f2f5f8;
    --bg-soft: #e6ecf2;
    --ink: #121c28;
    --ink-soft: #4f5f72;
    --brand: #0d4b74;
    --brand-strong: #0a3553;
    --accent: #ec7c2d;
    --white: #ffffff;
    --line: #c7d5e3;
    --radius: 18px;
    --shadow: 0 14px 38px rgba(9, 26, 43, 0.14);
    --heading: 'Barlow Condensed', 'Arial Narrow', sans-serif;
    --body: 'Manrope', 'Segoe UI', sans-serif;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

@keyframes orbFloatA {
    0% {
        transform: translate3d(-14px, 0, 0) scale(1);
    }
    50% {
        transform: translate3d(20px, -14px, 0) scale(1.06);
    }
    100% {
        transform: translate3d(-14px, 0, 0) scale(1);
    }
}

@keyframes orbFloatB {
    0% {
        transform: translate3d(0, -10px, 0) scale(1);
    }
    50% {
        transform: translate3d(-16px, 12px, 0) scale(1.08);
    }
    100% {
        transform: translate3d(0, -10px, 0) scale(1);
    }
}

@keyframes mediaDrift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--body);
    color: var(--ink);
    line-height: 1.6;
    background:
        radial-gradient(circle at 10% -10%, rgba(13, 75, 116, 0.16), transparent 45%),
        radial-gradient(circle at 90% 15%, rgba(236, 124, 45, 0.15), transparent 40%),
        linear-gradient(180deg, #f8fbfd 0%, var(--bg-main) 100%);
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: var(--scroll-progress, 0%);
    height: 4px;
    background: linear-gradient(90deg, #0a6aa4, #ec7c2d);
    z-index: 4500;
    pointer-events: none;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
}

.container {
    width: min(1120px, 92vw);
    margin: 0 auto;
}

.skip-link {
    position: absolute;
    left: -999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.skip-link:focus {
    left: 1rem;
    top: 1rem;
    width: auto;
    height: auto;
    background: var(--white);
    border: 2px solid var(--brand);
    padding: 0.6rem 0.9rem;
    z-index: 10000;
}

.top-bar {
    background: var(--brand-strong);
    color: var(--white);
    font-size: 0.9rem;
    max-height: 42px;
    opacity: 1;
    overflow: hidden;
    transition: max-height 0.28s ease, opacity 0.24s ease;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 42px;
}

.top-bar p {
    margin: 0;
}

.top-bar a {
    font-weight: 700;
    text-decoration: none;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 2000;
    backdrop-filter: blur(8px);
    background: rgba(248, 251, 253, 0.94);
    border-bottom: 1px solid rgba(12, 41, 65, 0.08);
    transition: background 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.nav-wrap {
    display: grid;
    grid-template-columns: auto auto;
    align-items: center;
    justify-content: space-between;
    min-height: 78px;
    gap: 1rem;
    transition: min-height 0.28s ease;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
}

.brand img {
    border-radius: 12px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.16);
    transition: transform 0.28s ease;
}

.brand span {
    font-family: var(--heading);
    letter-spacing: 0.05em;
    font-size: 1.65rem;
    color: var(--brand-strong);
    transition: transform 0.28s ease;
}

body.is-scrolled .site-header {
    background: rgba(248, 251, 253, 0.98);
    border-bottom-color: rgba(10, 53, 83, 0.2);
    box-shadow: 0 10px 24px rgba(8, 30, 48, 0.08);
}

body.is-scrolled .top-bar {
    max-height: 0;
    opacity: 0;
}

body.is-scrolled .nav-wrap {
    min-height: 66px;
}

body.is-scrolled .brand img {
    transform: scale(0.92);
}

body.is-scrolled .brand span {
    transform: scale(0.96);
}

.menu-toggle {
    display: none;
    border: 1px solid rgba(13, 75, 116, 0.24);
    border-radius: 12px;
    background: var(--white);
    color: var(--brand-strong);
    font-family: var(--heading);
    font-size: 1.1rem;
    padding: 0.5rem 0.9rem;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.15rem;
}

.site-nav ul {
    display: flex;
    gap: 1.1rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-nav a {
    text-decoration: none;
}

.site-nav ul a {
    position: relative;
    isolation: isolate;
    font-weight: 700;
    color: var(--ink);
    padding: 0.35rem 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s ease, color 0.2s ease;
}

.site-nav ul a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #0a6aa4, #ec7c2d);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.28s ease;
}

.site-nav ul a:hover,
.site-nav ul a:focus-visible {
    color: var(--brand);
    border-color: var(--accent);
}

.site-nav ul a:hover::after,
.site-nav ul a:focus-visible::after {
    transform: scaleX(1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 999px;
    padding: 0.88rem 1.25rem;
    font-weight: 800;
    text-decoration: none;
    color: var(--white);
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background: linear-gradient(135deg, #f38f48 0%, #e56d14 100%);
    transition: transform 0.18s ease, box-shadow 0.2s ease, filter 0.2s ease;
    box-shadow: 0 12px 24px rgba(229, 109, 20, 0.28);
}

.btn::after {
    content: '';
    position: absolute;
    inset: -145% -40%;
    background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, 0.48) 48%, transparent 66%);
    transform: translateX(-130%) rotate(12deg);
    transition: transform 0.7s ease;
    pointer-events: none;
}

.btn:hover,
.btn:focus-visible {
    transform: translateY(-2px);
    filter: saturate(1.1);
}

.btn:hover::after,
.btn:focus-visible::after {
    transform: translateX(130%) rotate(12deg);
}

.btn-secondary {
    background: linear-gradient(135deg, #185f90 0%, #0c456c 100%);
    box-shadow: 0 10px 24px rgba(12, 69, 108, 0.25);
}

.btn-nav {
    padding: 0.72rem 1.1rem;
}

.hero {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    padding: clamp(3.5rem, 7vw, 6rem) 0 3.5rem;
}

.hero::before,
.hero::after {
    content: '';
    position: absolute;
    border-radius: 999px;
    filter: blur(0.5px);
    pointer-events: none;
}

.hero::before {
    width: clamp(260px, 32vw, 460px);
    height: clamp(260px, 32vw, 460px);
    top: -120px;
    right: -110px;
    background: radial-gradient(circle, rgba(11, 73, 112, 0.28), rgba(11, 73, 112, 0));
    animation: orbFloatA 9.5s ease-in-out infinite;
}

.hero::after {
    width: clamp(230px, 26vw, 390px);
    height: clamp(230px, 26vw, 390px);
    bottom: -120px;
    left: -90px;
    background: radial-gradient(circle, rgba(236, 124, 45, 0.2), rgba(236, 124, 45, 0));
    animation: orbFloatB 10.5s ease-in-out infinite;
}

.hero-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.35fr 0.9fr;
    gap: 1.5rem;
    align-items: stretch;
}

.hero-copy,
.hero-card {
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.hero-copy {
    padding: clamp(1.4rem, 4vw, 2.3rem);
    background:
        linear-gradient(160deg, rgba(10, 53, 83, 0.95), rgba(13, 75, 116, 0.92)),
        linear-gradient(45deg, transparent 0, transparent 65%, rgba(236, 124, 45, 0.25) 100%);
    background-size: 180% 180%, 140% 140%;
    animation: gradientShift 12s ease-in-out infinite;
    color: var(--white);
}

.hero-copy h1 {
    margin: 0.4rem 0 0.8rem;
    font-family: var(--heading);
    font-size: clamp(2.05rem, 5vw, 3.45rem);
    line-height: 0.95;
    letter-spacing: 0.01em;
}

.hero-copy p {
    margin: 0;
    max-width: 62ch;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1.25rem;
}

.hero-points {
    margin: 1rem 0 0;
    padding-left: 1.15rem;
}

.hero-points li {
    margin-bottom: 0.35rem;
}

.hero-card {
    background: var(--white);
    padding: 1.35rem;
    border: 1px solid rgba(14, 61, 94, 0.08);
    display: grid;
    gap: 0.75rem;
    align-content: start;
}

.hero-card h2 {
    margin: 0;
    font-family: var(--heading);
    font-size: 2rem;
    color: var(--brand);
    letter-spacing: 0.03em;
}

.hero-card address {
    font-style: normal;
    color: var(--ink-soft);
}

.hero-card a {
    color: var(--brand);
    font-weight: 700;
}

.hero-rge {
    margin: 0.2rem 0 0;
    padding: 0.45rem;
    width: fit-content;
    max-width: 168px;
    border-radius: 14px;
    background: linear-gradient(160deg, #f7fbff, #e7f1f8);
    border: 1px solid rgba(13, 75, 116, 0.2);
    box-shadow: 0 8px 18px rgba(9, 34, 54, 0.12);
}

.hero-rge img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
}

.hero-card iframe {
    width: 100%;
    border-radius: 12px;
}

.eyebrow {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.78rem;
    font-weight: 800;
    color: #185f90;
}

.hero-copy .eyebrow {
    color: #ffd7ba;
}

.section {
    padding: clamp(3.2rem, 7vw, 4.9rem) 0;
}

.section-alt {
    background: linear-gradient(180deg, rgba(223, 232, 241, 0.6), rgba(236, 242, 247, 0.8));
    border-top: 1px solid rgba(10, 53, 83, 0.06);
    border-bottom: 1px solid rgba(10, 53, 83, 0.06);
}

.section-head {
    max-width: 72ch;
}

.section-head h2 {
    margin: 0.25rem 0 0.65rem;
    font-family: var(--heading);
    font-size: clamp(1.8rem, 4vw, 2.7rem);
    line-height: 1;
    letter-spacing: 0.02em;
    color: var(--brand-strong);
}

.section-head p {
    margin: 0;
    color: var(--ink-soft);
}

.service-grid {
    margin-top: 1.4rem;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 9px 24px rgba(15, 34, 52, 0.08);
    padding: 1.2rem;
}

.card h3 {
    margin: 0.35rem 0 0.5rem;
    font-family: var(--heading);
    font-size: 1.75rem;
    line-height: 0.95;
    color: var(--brand-strong);
}

.card p {
    margin: 0;
    color: var(--ink-soft);
}

.card-kicker {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.13em;
    font-size: 0.72rem;
    font-weight: 800;
    color: var(--accent);
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.process-step {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.1rem 1rem;
    box-shadow: 0 10px 24px rgba(10, 35, 58, 0.07);
}

.process-step span {
    display: inline-block;
    font-family: var(--heading);
    font-size: 2rem;
    color: var(--accent);
    line-height: 1;
}

.process-step h3 {
    margin: 0.3rem 0 0.45rem;
    font-family: var(--heading);
    font-size: 1.65rem;
    line-height: 1;
    color: var(--brand);
}

.process-step p {
    margin: 0;
    color: var(--ink-soft);
}

.case-grid {
    margin-top: 1.4rem;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.case-card {
    margin: 0;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--white);
    border: 1px solid var(--line);
    box-shadow: 0 12px 26px rgba(8, 25, 40, 0.09);
}

.case-media {
    min-height: 190px;
    border-bottom: 1px solid rgba(10, 53, 83, 0.09);
    background-size: 165% 165%;
    animation: mediaDrift 15s ease-in-out infinite;
}

.case-toiture {
    background:
        linear-gradient(145deg, rgba(7, 56, 88, 0.75), rgba(7, 56, 88, 0.1)),
        linear-gradient(35deg, #70849b, #b6c3cf);
}

.case-facade {
    background:
        linear-gradient(145deg, rgba(236, 124, 45, 0.7), rgba(236, 124, 45, 0.05)),
        linear-gradient(25deg, #d2b79d, #f6e7d6);
}

.case-etancheite {
    background:
        linear-gradient(145deg, rgba(18, 41, 65, 0.72), rgba(18, 41, 65, 0.14)),
        linear-gradient(35deg, #7ca0b8, #c6d9e8);
}

.case-card figcaption {
    padding: 1rem;
}

.case-card h3 {
    margin: 0;
    font-family: var(--heading);
    font-size: 1.6rem;
    line-height: 0.95;
    color: var(--brand-strong);
}

.case-card p {
    margin: 0.55rem 0 0;
    color: var(--ink-soft);
}

.zones-list {
    margin: 1.4rem 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.65rem;
}

.zones-list li {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 11px;
    padding: 0.75rem;
    text-align: center;
    font-weight: 700;
    color: var(--brand-strong);
}

.faq-list {
    margin-top: 1.2rem;
    display: grid;
    gap: 0.72rem;
}

.faq-item {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 0.85rem 1rem;
}

.faq-item summary {
    cursor: pointer;
    font-weight: 700;
    color: var(--brand-strong);
}

.faq-item p {
    margin: 0.6rem 0 0.2rem;
    color: var(--ink-soft);
}

.section-cta {
    padding-top: 2.2rem;
}

.devis-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.devis-copy {
    background: linear-gradient(155deg, rgba(7, 56, 88, 0.95), rgba(14, 84, 129, 0.95));
    border-radius: var(--radius);
    color: var(--white);
    padding: clamp(1.25rem, 3vw, 2rem);
    box-shadow: var(--shadow);
}

.devis-copy h2 {
    margin: 0.28rem 0 0.7rem;
    font-family: var(--heading);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    line-height: 0.95;
}

.devis-copy p {
    margin: 0 0 1rem;
    color: #e9f2fa;
}

.devis-copy .eyebrow {
    color: #ffd4b4;
}

.devis-form {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: clamp(1rem, 3vw, 1.4rem);
    box-shadow: 0 12px 30px rgba(8, 25, 42, 0.1);
}

.devis-form label {
    display: block;
    margin: 0 0 0.33rem;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--brand-strong);
}

.devis-form input,
.devis-form textarea {
    width: 100%;
    border: 1px solid #b8cadb;
    border-radius: 11px;
    padding: 0.72rem 0.82rem;
    margin-bottom: 0.8rem;
    font-family: var(--body);
    color: var(--ink);
    background: #fdfefe;
}

.devis-form input:focus,
.devis-form textarea:focus {
    outline: 2px solid rgba(13, 75, 116, 0.25);
    border-color: #246992;
}

.devis-form button {
    width: 100%;
}

.devis-form button[disabled] {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.hp-field {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.form-status {
    margin: 0.85rem 0 0;
    font-size: 0.9rem;
    font-weight: 700;
    color: #0a5b2b;
    min-height: 1.2rem;
}

.form-status.is-error {
    color: #a11a1a;
}

.site-footer {
    background: #0e2539;
    color: #d8e4ef;
    margin-top: 3.2rem;
    padding-top: 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.15rem;
}

.footer-title {
    margin: 0 0 0.35rem;
    color: #fff;
    font-family: var(--heading);
    font-size: 1.5rem;
    letter-spacing: 0.02em;
}

.site-footer p {
    margin: 0 0 0.35rem;
}

.site-footer a {
    color: #eab58e;
}

.footer-bottom {
    margin-top: 1.2rem;
    border-top: 1px solid rgba(196, 215, 232, 0.2);
    min-height: 58px;
    display: grid;
    align-items: center;
}

.reveal {
    --parallax-y: 0px;
    --tilt-rotate-x: 0deg;
    --tilt-rotate-y: 0deg;
    --tilt-shift-x: 0px;
    --tilt-shift-y: 0px;
    --reveal-delay: 0ms;
    --move-speed: 0.64s;
    opacity: 0;
    transform:
        perspective(950px)
        translate3d(var(--tilt-shift-x), calc(14px + var(--tilt-shift-y) + var(--parallax-y)), 0)
        rotateX(var(--tilt-rotate-x))
        rotateY(var(--tilt-rotate-y));
    transition:
        opacity 0.5s ease,
        transform var(--move-speed) cubic-bezier(0.2, 0.7, 0.2, 1),
        box-shadow 0.3s ease;
    transition-delay: var(--reveal-delay);
}

.reveal.is-visible {
    opacity: 1;
    transform:
        perspective(950px)
        translate3d(var(--tilt-shift-x), calc(var(--tilt-shift-y) + var(--parallax-y)), 0)
        rotateX(var(--tilt-rotate-x))
        rotateY(var(--tilt-rotate-y));
}

.tilt-node {
    transform-style: preserve-3d;
    will-change: transform;
    --move-speed: 0.24s;
}

@media (hover: hover) and (pointer: fine) {
    .zones-list li {
        transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
    }

    .faq-item,
    .card,
    .process-step,
    .case-card,
    .hero-card,
    .devis-form {
        transition: box-shadow 0.28s ease, border-color 0.28s ease;
    }

    .zones-list li:hover,
    .faq-item:hover,
    .card:hover,
    .process-step:hover,
    .case-card:hover,
    .hero-card:hover,
    .devis-form:hover {
        border-color: rgba(13, 75, 116, 0.3);
        box-shadow: 0 16px 30px rgba(9, 28, 45, 0.14);
    }

    .zones-list li:hover {
        transform: translateY(-3px);
    }
}

@media (max-width: 980px) {
    .hero-grid,
    .service-grid,
    .process-grid,
    .case-grid,
    .devis-grid {
        grid-template-columns: 1fr;
    }

    .zones-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 860px) {
    .menu-toggle {
        display: inline-flex;
    }

    .site-nav {
        position: absolute;
        top: calc(100% + 6px);
        right: 4vw;
        width: min(310px, 92vw);
        padding: 0.85rem;
        border-radius: 14px;
        border: 1px solid rgba(7, 43, 69, 0.15);
        background: var(--white);
        box-shadow: 0 16px 28px rgba(10, 35, 58, 0.17);
        display: none;
        flex-direction: column;
        align-items: stretch;
    }

    .site-nav.is-open {
        display: flex;
    }

    .site-nav ul {
        flex-direction: column;
        gap: 0.2rem;
    }

    .site-nav ul a {
        display: block;
        border-bottom: none;
        border-radius: 8px;
        padding: 0.5rem 0.6rem;
    }

    .site-nav ul a:hover,
    .site-nav ul a:focus-visible {
        background: #e8f0f6;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .btn,
    .reveal,
    .hero-copy,
    .hero::before,
    .hero::after,
    .case-media {
        animation: none;
        transition: none;
    }

    body::before {
        display: none;
    }
}