:root {
    --dark: #1E293B;
    --green: #059669;
    --blue: #58b8e0;
    --light: #F8FAFC;
    --text: #64748B;
    --white: #fff;
    --shadow: 0 30px 80px rgba(30, 41, 59, .12)
}

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

html {
    scroll-behavior: smooth
}

body {
    font-family: Inter, Segoe UI, Arial, sans-serif;
    color: var(--dark);
    background: var(--light);
    overflow-x: hidden
}

a {
    text-decoration: none
}

img {
    max-width: 100%
}

.section-padding {
    padding: 110px 0
}

.section-badge {
    display: inline-block;
    padding: 9px 18px;
    border-radius: 50px;
    background: rgba(5, 150, 105, .12);
    color: var(--green);
    font-weight: 800;
    margin-bottom: 18px
}

.section-badge.dark {
    background: rgba(88, 184, 224, .16);
    color: var(--blue)
}

.section-title {
    font-size: clamp(34px, 5vw, 58px);
    font-weight: 900;
    line-height: 1.08;
    color: var(--dark)
}

.section-intro {
    color: var(--text);
    font-size: 18px;
    line-height: 1.8;
    max-width: 760px;
    margin: auto
}

.altec-navbar {
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(18px);
    box-shadow: 0 12px 35px rgba(30, 41, 59, .08);
    padding: 14px 0;
    transition: .35s
}

.navbar-brand img {
    height: 58px
}

.nav-link {
    color: var(--dark);
    font-weight: 700;
    margin: 0 7px;
    position: relative
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 4px;
    width: 0;
    height: 2px;
    background: var(--green);
    transition: .35s
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%
}

.btn-primary-altec {
    background: linear-gradient(135deg, var(--green), #10b981);
    color: #fff !important;
    border: none;
    border-radius: 50px;
    padding: 12px 28px;
    font-weight: 800;
    box-shadow: 0 16px 35px rgba(5, 150, 105, .28);
    transition: .35s
}

.btn-primary-altec:hover {
    transform: translateY(-3px)
}

.btn-secondary-altec {
    background: #fff;
    color: var(--dark) !important;
    border: 1px solid rgba(88, 184, 224, .35);
    border-radius: 50px;
    padding: 12px 28px;
    font-weight: 800;
    transition: .35s
}

.btn-secondary-altec:hover {
    background: var(--blue);
    color: #fff !important;
    transform: translateY(-3px)
}

.btn span {
    display: block;
    font-size: 12px;
    font-weight: 500;
    opacity: .85
}

.hero-section {
    position: relative;
    min-height: 100vh;
    background: linear-gradient(120deg, rgba(30, 41, 59, .92), rgba(5, 150, 105, .72)), url("../assets/hero/hero-usine.jpg") center/cover no-repeat;
    overflow: hidden
}

.hero-section::before {
    content: "";
    position: absolute;
    width: 650px;
    height: 650px;
    border-radius: 50%;
    background: rgba(88, 184, 224, .18);
    top: -180px;
    right: -160px;
    animation: floatBubble 8s ease-in-out infinite
}

.hero-content {
    position: relative;
    z-index: 2;
    padding-top: 90px
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, .16);
    color: #fff;
    padding: 10px 18px;
    border-radius: 50px;
    margin-bottom: 20px;
    font-weight: 700;
    backdrop-filter: blur(10px)
}

.hero-title {
    font-size: clamp(42px, 6vw, 78px);
    line-height: 1.05;
    font-weight: 950;
    color: #fff;
    margin-bottom: 24px
}

.hero-text {
    color: rgba(255, 255, 255, .9);
    font-size: 18px;
    line-height: 1.8;
    max-width: 720px;
    margin-bottom: 34px
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px
}

.hero-card {
    background: rgba(255, 255, 255, .13);
    border: 1px solid rgba(255, 255, 255, .22);
    border-radius: 30px;
    padding: 18px;
    backdrop-filter: blur(20px);
    box-shadow: 0 30px 70px rgba(0, 0, 0, .28)
}

.video-box {
    position: relative;
    overflow: hidden;
    border-radius: 24px
}

.video-box img {
    width: 100%;
    height: 330px;
    object-fit: cover;
    transition: .6s
}

.video-box:hover img {
    transform: scale(1.08)
}

.play-btn {
    position: absolute;
    inset: 50% auto auto 50%;
    transform: translate(-50%, -50%);
    width: 82px;
    height: 82px;
    border-radius: 50%;
    border: none;
    background: #fff;
    color: var(--green);
    font-size: 42px;
    box-shadow: 0 0 0 18px rgba(255, 255, 255, .22);
    animation: pulse 2s infinite
}

.hero-card-footer {
    color: #fff;
    display: flex;
    justify-content: space-between;
    padding: 18px 4px 2px
}

.stats-section {
    margin-top: -70px;
    position: relative;
    z-index: 5;
    padding-bottom: 80px
}

.stat-card {
    height: 100%;
    padding: 34px 26px;
    border-radius: 28px;
    background: #fff;
    box-shadow: 0 25px 60px rgba(30, 41, 59, .1);
    transition: .35s;
    border: 1px solid rgba(88, 184, 224, .14)
}

.stat-card:hover {
    transform: translateY(-10px)
}

.stat-card i {
    font-size: 38px;
    color: var(--green);
    margin-bottom: 18px
}

.stat-card h3 {
    font-size: 42px;
    font-weight: 950;
    color: var(--dark)
}

.stat-card p {
    color: var(--text);
    line-height: 1.6
}

.premium-card, .why-card, .material-card, .source-card {
    background: #fff;
    border-radius: 30px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(88, 184, 224, .14);
    overflow: hidden;
    transition: .35s;
    height: 100%
}

.premium-card:hover, .why-card:hover, .material-card:hover, .source-card:hover {
    transform: translateY(-10px);
    border-color: rgba(5, 150, 105, .32)
}

.premium-card img, .source-card img, .material-card img {
    width: 100%;
    height: 260px;
    object-fit: cover
}

.card-body-premium {
    padding: 32px
}

.card-body-premium i, .why-card i, .source-card i {
    font-size: 42px;
    color: var(--green);
    margin-bottom: 18px
}

.card-body-premium h3, .why-card h3, .source-card h3 {
    font-weight: 900;
    margin-bottom: 14px
}

.card-body-premium p, .why-card p, .source-card p {
    color: var(--text);
    line-height: 1.7
}

.premium-image {
    border-radius: 34px;
    overflow: hidden;
    box-shadow: var(--shadow)
}

.premium-image img {
    width: 100%;
    height: 480px;
    object-fit: cover;
    transition: .6s
}

.premium-image:hover img {
    transform: scale(1.07)
}

.page-hero {
    padding: 170px 0 110px;
    color: #fff;
    background: linear-gradient(120deg, rgba(30, 41, 59, .92), rgba(5, 150, 105, .75)), url("../assets/hero/usine-interieur.jpg") center/cover no-repeat
}

.page-hero h1 {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 950;
    max-width: 980px
}

.page-hero p {
    font-size: 20px;
    max-width: 780px;
    color: rgba(255, 255, 255, .88)
}

.story-section, .supply-section, .why-section, .machine-section {
    padding: 100px 0
}

.supply-section {
    background: #fff
}

.why-card {
    padding: 38px 32px
}

.process-hero {
    background: linear-gradient(120deg, rgba(30, 41, 59, .93), rgba(5, 150, 105, .72)), url("../assets/process/extrusion.jpg") center/cover no-repeat
}

.sources-section, .timeline-section, .quality-section {
    padding: 105px 0
}

.flow-section {
    padding: 40px 0;
    background: #fff
}

.flow-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 25px;
    padding: 35px;
    border-radius: 35px;
    background: linear-gradient(135deg, #fff, #f1f5f9);
    box-shadow: var(--shadow)
}

.flow-item, .flow-center {
    text-align: center
}

.flow-item span {
    display: block;
    color: var(--green);
    font-weight: 900;
    font-size: 24px
}

.flow-center img {
    height: 70px;
    margin-bottom: 10px
}

.flow-arrow i {
    font-size: 34px;
    color: var(--blue)
}

.process-step {
    display: grid;
    grid-template-columns:1fr 1fr;
    gap: 55px;
    align-items: center;
    margin-bottom: 80px
}

.process-step.reverse .process-img {
    order: 2
}

.process-img {
    border-radius: 32px;
    overflow: hidden;
    box-shadow: var(--shadow)
}

.process-img img {
    width: 100%;
    height: 390px;
    object-fit: cover;
    transition: .6s
}

.process-step:hover img {
    transform: scale(1.06)
}

.process-content span {
    color: var(--green);
    font-size: 52px;
    font-weight: 950
}

.process-content h3 {
    font-size: 38px;
    font-weight: 950;
    margin-bottom: 15px
}

.process-content p {
    color: var(--text);
    line-height: 1.8;
    font-size: 18px
}

.quality-section {
    background: var(--dark);
    color: #fff
}

.quality-section h2 {
    font-size: clamp(34px, 5vw, 58px);
    font-weight: 950
}

.quality-section p {
    color: rgba(255, 255, 255, .78);
    font-size: 18px;
    line-height: 1.8
}

.process-cta {
    padding: 90px 0;
    background: linear-gradient(135deg, var(--green), var(--blue));
    color: #fff
}

.material-hero {
    background: linear-gradient(120deg, rgba(30, 41, 59, .92), rgba(5, 150, 105, .68)), url("../assets/matieres/catalogue-polymere.jpg") center/cover no-repeat
}

.material-card img {
    height: 240px
}

.material-tag {
    display: inline-block;
    background: rgba(5, 150, 105, .1);
    color: var(--green);
    border-radius: 30px;
    padding: 7px 13px;
    font-weight: 800;
    font-size: 13px;
    margin-bottom: 12px
}

.applications-section {
    padding: 100px 0;
    background: #fff
}

.application-item {
    padding: 28px;
    border-radius: 26px;
    background: var(--light);
    height: 100%;
    transition: .35s
}

.application-item:hover {
    transform: translateY(-7px)
}

.application-item i {
    font-size: 36px;
    color: var(--green);
    margin-bottom: 15px
}

.env-hero {
    background: linear-gradient(120deg, rgba(30, 41, 59, .90), rgba(5, 150, 105, .70)), url("../assets/environnement/recyclage.jpg") center/cover no-repeat
}

.circular-section, .carbon-section, .pollution-section {
    padding: 105px 0
}

.loop-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    background: #fff;
    border-radius: 34px;
    padding: 35px;
    box-shadow: var(--shadow)
}

.loop-step {
    text-align: center;
    flex: 1
}

.loop-step i {
    font-size: 42px;
    color: var(--green);
    display: block;
    margin-bottom: 12px
}

.loop-arrow {
    color: var(--blue);
    font-size: 32px
}

.carbon-section {
    background: var(--dark);
    color: #fff
}

.carbon-section p {
    color: rgba(255, 255, 255, .78)
}

.pollution-section {
    background: #fff
}

.contact-hero {
    background: linear-gradient(120deg, rgba(30, 41, 59, .92), rgba(5, 150, 105, .68)), url("../assets/logistique/entrepot.jpg") center/cover no-repeat
}

.contact-section {
    padding: 105px 0
}

.contact-card {
    background: #fff;
    border-radius: 34px;
    padding: 38px;
    box-shadow: var(--shadow);
    height: 100%
}

.contact-card i {
    font-size: 38px;
    color: var(--green);
    margin-bottom: 15px
}

.form-control {
    border-radius: 16px;
    padding: 14px 18px;
    border: 1px solid rgba(100, 116, 139, .2)
}

.map-box {
    border-radius: 34px;
    overflow: hidden;
    box-shadow: var(--shadow);
    min-height: 420px
}

.map-box iframe {
    width: 100%;
    height: 420px;
    border: 0
}

.footer {
    background: var(--dark);
    padding: 50px 0;
    color: #fff
}

.footer img {
    height: 60px;
    margin-bottom: 16px;
    filter: brightness(1.08)
}

.footer p {
    color: rgba(255, 255, 255, .7);
    margin: 0
}

.reveal {
    opacity: 0;
    transform: translateY(35px);
    transition: 1s ease
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0)
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, .35)
    }
    70% {
        box-shadow: 0 0 0 22px rgba(255, 255, 255, 0)
    }
    100% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0)
    }
}

@keyframes floatBubble {
    0%, 100% {
        transform: translateY(0)
    }
    50% {
        transform: translateY(35px)
    }
}