:root {
    --bg: #f4f1ea;
    --ink: #0f0f0f; 
    --accent: #0020C2; 
    --accent2: #4757a6; 
    --muted: #a0a0a0;
    --serif: 'Tenor Sans', serif; 
    --sans: 'Barlow', sans-serif; 
    --code: 'Fira Code', monospace;
    --side-padding: 10%;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body { background: var(--bg); color: var(--ink); font-family: var(--sans); overflow-x: hidden; }

/* grain original */
body::after {
    content: ""; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background-image: url("https://www.transparenttextures.com/patterns/asfalt-dark.png");
    opacity: 0.03; pointer-events: none; z-index: 9999;
}


#canvas-container { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; opacity: 0.3; pointer-events: none; }


/* NAV */
nav {
    position: fixed; top: 0; width: 100%; padding: 25px var(--side-padding);
    display: flex; justify-content: space-between; align-items: center;
    z-index: 1000; mix-blend-mode: exclusion;
}
.logo { font-family: 'Italiana', serif; font-size: 24px; 
    background: linear-gradient(to bottom, #fff, #222);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    letter-spacing: 10px; color: #fff; text-decoration: none; padding-bottom: 10px; }

.sub-logo { font-family: 'Italiana', serif; font-size: 12px; 
    letter-spacing: 6px;  }


.nav-menu { display: flex; gap: 40px; align-items: center; }

.nav-link {
    color: #fff;
    text-decoration: none;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 4px;
    transition: color 0.4s ease, letter-spacing 0.3s ease;
    font-weight: 400;
    padding: 0 4px;
}
.nav-link:hover { color: var(--accent); letter-spacing: 8px; }

/* HAMBURGER */
.hamburger {
    display: none;
    flex-direction: column; justify-content: center; gap: 7px;
    width: 44px; height: 44px; padding: 8px;
    background: none; border: none; cursor: pointer;
    position: relative; z-index: 1100;
}
.hamburger span {
    display: block; width: 100%; height: 1.5px;
    background: #fff;
    border-radius: 2px;
    transition: transform 0.5s cubic-bezier(0.76, 0, 0.24, 1), opacity 0.3s ease, width 0.4s ease;
}
.hamburger span:nth-child(2) { width: 60%; align-self: flex-end; }
.hamburger.open span:nth-child(1) { transform: translateY(8.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-8.5px) rotate(-45deg); }

.overlay-header {
    position: absolute;
    top: 40px; 
    left: 5%;
    opacity: 0;
    transform: translateY(-10px); /* Petit effet de mouvement vers le haut */
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.2s;
}

.nav-overlay.open .overlay-header {
    opacity: 1;
    transform: translateY(0); /* Le logo se remet en place à l'ouverture */
}
.overlay-header.label-logo { font-size: 10px; letter-spacing: 2px;
 color:  rgba(255,255,255,0.2); display: block; font-weight: 500; }


.overlay-header .logo {
    font-size: 22px; /* Taille légèrement réduite pour plus de finesse */
    letter-spacing: 10px; /* On accentue le lettrage pour le côté luxe */
    color: var(--accent);
    text-decoration: none;
    font-family: 'Tenor Sans', serif;
}


/* OVERLAY MOBILE */
.nav-overlay {
    position: fixed; inset: 0; background: #0f0f0f; z-index: 1050;
    display: flex; flex-direction: column; justify-content: center; padding: 0 12%;
    clip-path: circle(0% at calc(100% - 44px) 54px);
    transition: clip-path 0.9s cubic-bezier(0.76, 0, 0.24, 1);
    pointer-events: none; overflow: hidden;
}
.nav-overlay.open { clip-path: circle(160% at calc(100% - 44px) 54px); pointer-events: all; }
.nav-overlay::before {
    content: "SYNAE"; position: absolute; bottom: -5%; right: -2%;
    font-family: var(--serif); font-size: 22vw; line-height: 1;
    color: transparent; -webkit-text-stroke: 1px rgba(255,255,255,0.04);
    pointer-events: none; letter-spacing: -1vw;
}
.overlay-label {
    margin-top: 80px; 
}
.overlay-label { font-family: var(--code); font-size: 10px; color: rgba(255,255,255,0.2); letter-spacing: 4px; margin-bottom: 50px; }
.overlay-links { list-style: none; }
.overlay-link {
    display: flex; align-items: baseline; gap: 20px; text-decoration: none; color: #fff;
    font-family: var(--serif); font-size: clamp(2.4rem, 6vw, 4.5rem); line-height: 1.15; padding: 10px 0;
    transform: translateY(110%); opacity: 0;
    transition: transform 0.05s linear, opacity 0.05s linear, color 0.3s ease;
}
.overlay-link.show {
    transform: translateY(0); opacity: 1;
    transition: transform 0.75s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), color 0.3s ease;
}
.ol-num { font-family: var(--code); font-size: 11px; color: rgba(255,255,255,0.25); letter-spacing: 3px; }

/* SECTIONS & TYPO */
.section { padding: 160px var(--side-padding); border-bottom: 1px solid rgba(0,0,0,0.05); position: relative; }
.label { font-size: 10px; text-transform: uppercase; letter-spacing: 6px; color: var(--accent); margin-bottom: 60px; display: block; font-weight: 500; }

.label-logo { font-size: 9px; letter-spacing: 1px; color: var(--muted); display: block; font-weight: 500; }
.label-logo-gr { font-size: 9.5px; color: var(--accent2); font-weight: 700; }
.huge-title { font-family: var(--serif); font-size: clamp(3rem, 8vw, 7rem); line-height: 0.95; margin-bottom: 60px; }
.huge-title i { font-weight: 100; font-style: normal; color: transparent; -webkit-text-stroke: 1px var(--ink); opacity: 0.3; }

.hero { height: 100vh; display: flex; align-items: center; padding: 0 var(--side-padding); }
.hero-stats { display: flex; gap: 80px; margin-top: 80px; flex-wrap: wrap; }
.stat-v { font-family: var(--serif); font-size: 56px; display: block; color: var(--ink); line-height: 1; margin-bottom: 10px; }
.stat-l { font-size: 11px; text-transform: uppercase; letter-spacing: 3px; color: var(--muted); }

/* SERVICES */
.svc-item { padding: 80px 0; border-top: 1px solid rgba(0,0,0,0.1); display: grid; grid-template-columns: 0.5fr 1.2fr 1fr; cursor: pointer; transition: 0.5s; }
.svc-item:hover { padding-left: 30px; color: var(--accent); }
.svc-t { font-family: var(--serif); font-size: 38px; }
.svc-d { font-size: 16px; color: #444; line-height: 1.7; max-width: 400px; }

/* METHODE */
.method-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.step-n { font-family: var(--code); color: var(--accent); font-size: 13px; margin-bottom: 20px; display: block; }
.step h3 { font-family: var(--serif); font-size: 24px; margin-bottom: 15px; }

.step { 
    padding: 30px; 
    border-left: 2px solid rgba(0, 32, 194, 0.2); /* Bleu accent très léger */
    background: rgba(168, 185, 225, 0.05); 
    backdrop-filter: blur(5px); 
    transition: all 0.4s ease;
}

.step:hover {
    border-left: 2px solid var(--accent); /* Le bleu devient vif au survol */
    background: rgba(168, 185, 225, 0.15);
    transform: translateX(10px);
}

/* SECTEURS */
.sectors-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: #ddd; margin-top: 60px; opacity: .7; }
.sector { background: var(--bg); padding: 80px 40px; text-align: center; transition: 0.5s; font-family: var(--serif); letter-spacing: 3px; }
.sector:hover { background: var(--ink); color: #fff; opacity: 0.5; }

/* SECTEURS MUSCLÉS */
.sectors-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
    background: rgba(0,0,0,0.05); /* Les lignes de séparation */
    margin-top: 40px;
}

.sector-card {
    background: var(--bg);
    padding: 60px 40px;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid transparent;
}

.sector-card:hover {
    background: #fff;
    box-shadow: 0 20px 40px rgba(0,0,0,0.02);
    z-index: 2;
}

.sector-cat {
    font-family: var(--code);
    font-size: 11px;
    color: var(--accent);
    letter-spacing: 2px;
    display: block;
    margin-bottom: 20px;
}

.sector-card h3 {
    font-family: var(--serif);
    font-size: 24px;
    margin-bottom: 15px;
    font-weight: 400;
}

.sector-card p {
    font-size: 15px;
    color: var(--muted);
    line-height: 1.6;
    max-width: 320px;
}

@media (max-width: 768px) {
    .sectors-container { grid-template-columns: 1fr; }
}

/* TERMINAL */
.terminal { background: #0f0f0f; color: #f7f5f5; padding: 60px; border-radius: 4px; font-family: var(--code); font-size: 15px; line-height: 1.8; }
.t-accent { color: var(--muted); }

.step { 
    padding: 30px; 
    border-left: 2px solid rgba(0, 32, 194, 0.2); /* Bleu accent très léger */
    background: rgba(168, 185, 225, 0.05); 
    backdrop-filter: blur(5px); 
    transition: all 0.4s ease;
}

.step:hover {
    border-left: 2px solid var(--accent); /* Le bleu devient vif au survol */
    background: rgba(168, 185, 225, 0.15);
    transform: translateX(10px);
}

/* SECTEURS MUSCLÉS */
.sectors-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
    background: rgba(0,0,0,0.05); /* Les lignes de séparation */
    margin-top: 40px;
}

.sector-card {
    background: var(--bg);
    padding: 60px 40px;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid transparent;
}

.sector-card:hover {
    background: #ffffffa3;
    
    box-shadow: 0 20px 40px rgba(0,0,0,0.02);
    z-index: 2;
}

.sector-cat {
    font-family: var(--code);
    font-size: 11px;
    color: var(--accent);
    letter-spacing: 2px;
    display: block;
    margin-bottom: 20px;
}

.sector-card h3 {
    font-family: var(--serif);
    font-size: 24px;
    margin-bottom: 15px;
    font-weight: 400;
}

.sector-card p {
    font-size: 15px;
    color: var(--muted);
    line-height: 1.6;
    max-width: 320px;
}

@media (max-width: 768px) {
    .sectors-container { grid-template-columns: 1fr; }
}

/* FOOTER */
footer { padding: 100px var(--side-padding); text-align: center; }
.cta-big { font-family: var(--serif); font-size: clamp(1.5rem, 5vw, 4rem); text-decoration: none; color: var(--ink); transition: 0.5s; }
.cta-big:hover { color: var(--accent); letter-spacing: 5px; }

/* MEDIA QUERIES */
@media (max-width: 1100px) {
    :root { --side-padding: 7%; }
    .nav-menu { display: none; }
    .hamburger { display: flex; }
    .svc-item { grid-template-columns: 60px 1fr; grid-template-rows: auto auto; gap: 8px; padding: 50px 0; }
    .svc-item .svc-d { grid-column: 2; }
    .method-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
}
@media (max-width: 768px) {
    :root { --side-padding: 6%; }
    .huge-title { font-size: clamp(2.4rem, 9vw, 4rem); }
    .svc-item { grid-template-columns: 1fr; }
    .sectors-grid { grid-template-columns: repeat(2, 1fr); }
}