:root {
    --primary: #1a4ce0;
    --primary-dark: #153bbd;
    --dark: #0f172a;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --bg: #f8fafc;
    --white: #ffffff;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Instrument Sans', sans-serif;
    color: var(--text);
    background: var(--white);
    overflow-x: hidden;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    line-height: 1.15;
    color: var(--dark);
}

a { text-decoration: none; color: inherit; }

img, svg { max-width: 100%; height: auto; display: block; }

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Header */
header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 22px;
    letter-spacing: 0.08em;
    color: var(--dark);
}

.logo svg {
    height: 28px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
    list-style: none;
}

.nav-links a {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-light);
    transition: color 0.3s;
}

.nav-links a:hover { color: var(--primary); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 4px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(26,76,224,0.25);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26,76,224,0.35);
}

.btn-outline {
    background: transparent;
    color: var(--dark);
    border: 1px solid var(--dark);
}

.btn-outline:hover {
    background: var(--dark);
    color: var(--white);
}

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.burger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark);
    transition: all 0.3s;
}

/* Hero */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: no-repeat center center;
    background-size: cover;
    overflow: hidden;
    padding-top: 72px;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15,23,42,0.82) 0%, rgba(15,23,42,0.55) 60%, rgba(15,23,42,0.75) 100%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: -1px;
    height: 180px;
    background: linear-gradient(to top, rgba(15,23,42,0.9), transparent);
    pointer-events: none;
}

.hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    width: 100%;
}

.hero-content h1 {
    font-size: clamp(36px, 5vw, 64px);
    color: var(--white);
    margin-bottom: 24px;
    max-width: 600px;
}

.hero-content p {
    font-size: 18px;
    color: rgba(255,255,255,0.75);
    max-width: 500px;
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-visual .fabric-card {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 4/3;
    background: linear-gradient(145deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-visual .fabric-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 10px,
        rgba(255,255,255,0.03) 10px,
        rgba(255,255,255,0.03) 11px
    );
}

.hero-visual .fabric-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        90deg,
        transparent,
        transparent 10px,
        rgba(255,255,255,0.03) 10px,
        rgba(255,255,255,0.03) 11px
    );
}

.hero-visual svg.wave-hero {
    position: relative;
    z-index: 2;
    width: 180px;
    height: auto;
    opacity: 0.9;
}

.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.4);
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* Section common */
section { width: 100%; }

.section-header {
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: clamp(28px, 3.5vw, 42px);
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-header h2 .highlight { color: var(--primary); }

.section-header p {
    font-size: 17px;
    color: var(--text-light);
    max-width: 600px;
}

/* Avantages */
.advantages {
    padding: 100px 0;
    background: var(--white);
}

.adv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.adv-card {
    padding: 40px 32px;
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.adv-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(26,76,224,0.08);
}

.adv-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(26,76,224,0.08);
    border-radius: 8px;
    margin-bottom: 24px;
    color: var(--primary);
}

.adv-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.adv-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* Gammes */
.gammes {
    padding: 100px 0;
    background: var(--bg);
}

.gamme-list {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.gamme-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    align-items: stretch;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.gamme-item:nth-child(even) .gamme-visual { order: 2; }
.gamme-item:nth-child(even) .gamme-content { order: 1; }

.gamme-visual {
    position: relative;
    height: 100%;
    min-height: 380px;
    background: var(--dark);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.gamme-visual-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.gamme-visual-img.active {
    opacity: 1;
}

.gamme-content {
    padding: 48px;
}

.gamme-tag {
    display: inline-block;
    padding: 6px 14px;
    background: var(--dark);
    color: var(--white);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: 4px;
    margin-bottom: 20px;
}

.gamme-content h3 {
    font-size: 32px;
    margin-bottom: 20px;
}

.gamme-content .lead {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 28px;
    line-height: 1.7;
}

.specs {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 28px;
}

.spec {
    display: flex;
    justify-content: space-between;
    padding-bottom: 12px;
    border-bottom: 1px dashed var(--border);
    font-size: 14px;
}

.spec-label {
    color: var(--text-light);
    font-weight: 500;
}

.spec-value {
    color: var(--text);
    font-weight: 600;
}

.usage-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}

.usage-tags span {
    padding: 6px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.colors {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-top: 20px;
}

.colors-label {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-light);
    white-space: nowrap;
    padding-top: 6px;
}

.color-dots {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    max-width: 100%;
}

.color-dot-wrapper {
    position: relative;
    display: flex;
}

.color-dot {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid var(--white);
    box-shadow: 0 0 0 1px var(--border);
    cursor: help;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.color-dot:hover {
    transform: scale(1.15);
    box-shadow: 0 0 0 2px var(--primary);
}

.color-dot-tooltip {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--dark);
    color: var(--white);
    font-size: 11px;
    font-weight: 500;
    padding: 6px 10px;
    border-radius: 6px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    z-index: 10;
}

.color-dot-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 4px;
    border-style: solid;
    border-color: var(--dark) transparent transparent transparent;
}

.color-dot-wrapper:hover .color-dot-tooltip {
    opacity: 1;
    visibility: visible;
}

/* Storm variants */
.storm-variants {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.storm-variant {
    flex: 1;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s;
}

.storm-variant {
    cursor: pointer;
}

.storm-variant:hover,
.storm-variant.active {
    border-color: var(--primary);
    background: rgba(26,76,224,0.04);
}

.variant-details-wrapper {
    display: grid;
}

.variant-details {
    grid-area: 1 / 1;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.variant-details.active {
    opacity: 1;
    pointer-events: auto;
}

.storm-variant strong {
    display: block;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 24px;
    color: var(--primary);
    margin-bottom: 4px;
}

.storm-variant span {
    font-size: 12px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 600;
}

/* Contexte / Applications */
.applications {
    padding: 100px 0;
    background: var(--white);
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.app-card {
    padding: 36px 28px;
    border: 1px solid var(--border);
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s;
}

.app-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(26,76,224,0.08);
}

.app-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(26,76,224,0.06);
    border-radius: 12px;
    color: var(--primary);
}

.app-card h4 {
    font-size: 15px;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.app-card p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.5;
}

/* Contact */
.contact {
    padding: 0;
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 50%; height: 100%;
    background: var(--dark);
    z-index: 0;
}

.contact-container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 600px;
}

.contact-info {
    background: var(--dark);
    color: var(--white);
    padding: 80px 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-info h2 {
    color: var(--white);
    font-size: 32px;
    margin-bottom: 20px;
}

.contact-info > p {
    color: rgba(255,255,255,0.7);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 48px;
}

.contact-detail {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 28px;
}

.contact-detail span {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.4);
    font-weight: 600;
}

.contact-detail a, .contact-detail strong {
    color: var(--white);
    font-size: 16px;
    font-weight: 600;
}

.contact-detail a:hover { opacity: 0.7; }

.contact-form-wrapper {
    background: var(--white);
    padding: 80px 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.form-message-success,
.form-message-error {
    font-size: 16px;
    text-align: center;
    padding: 12px;
    border-radius: 8px;
}

.form-message-success {
    background: rgba(0, 255, 0, 0.1);
    color: green;
}

.form-message-error {
    background: rgba(255, 0, 0, 0.1);
    color: red;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--dark);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: 'Instrument Sans', sans-serif;
    font-size: 15px;
    color: var(--text);
    transition: border-color 0.3s, box-shadow 0.3s;
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,76,224,0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group textarea { resize: vertical; min-height: 120px; }

.form-submit {
    width: 100%;
    margin-top: 8px;
}

/* Footer */
footer {
    background: var(--dark);
    color: rgba(255,255,255,0.5);
    padding: 40px 0;
    text-align: center;
    font-size: 13px;
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

footer .logo {
    color: rgba(255,255,255,0.7);
    font-size: 16px;
}

/* Mobile menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
    z-index: 999;
}

.mobile-menu.open { display: block; }

.mobile-menu ul {
    list-style: none;
    display: flex;
    flex-direction: column;
}

.mobile-menu a {
    display: block;
    padding: 14px 40px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

.mobile-menu a:hover { color: var(--primary); }

/* Responsive */
@media (max-width: 1024px) {
    .container { padding: 0 30px; }
    .nav-links { display: none; }
    .burger { display: flex; }

    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero-content h1 { margin: 0 auto 24px; }
    .hero-content p { margin: 0 auto 40px; }
    .hero-visual { display: none; }

    .adv-grid { grid-template-columns: 1fr; }
    .gamme-item { grid-template-columns: 1fr; }
    .gamme-item:nth-child(even) .gamme-visual { order: 0; }
    .gamme-item:nth-child(even) .gamme-content { order: 0; }
    .gamme-visual { min-height: 260px; }
    .gamme-content { padding: 36px; }
    .gamme-item { gap: 0; }

    .app-grid { grid-template-columns: repeat(2, 1fr); }

    .contact::before { width: 100%; height: 45%; }
    .contact-container { grid-template-columns: 1fr; }
    .contact-info { padding: 60px 30px; }
    .contact-form-wrapper { padding: 60px 30px; }

    footer .container { flex-direction: column; gap: 12px; }
}

@media (max-width: 640px) {
    .container { padding: 0 20px; }
    .app-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .gamme-content { padding: 28px; }
    .contact-info, .contact-form-wrapper { padding: 40px 20px; }
}