/* ============================================
   MARINH₂O — Site vitrine
   Palette : bleus profonds + accents cyan
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=Playfair+Display:wght@500;600;700&display=swap');

:root {
  --blue-900: #0b1d3a;
  --blue-800: #0f2a52;
  --blue-700: #163d6e;
  --blue-600: #1a5293;
  --blue-500: #2471b8;
  --cyan-400: #38bdf8;
  --cyan-300: #7dd3fc;
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --green-500: #22c55e;
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --shadow-sm: 0 1px 3px rgba(11,29,58,.08);
  --shadow-md: 0 4px 16px rgba(11,29,58,.1);
  --shadow-lg: 0 8px 32px rgba(11,29,58,.12);
  --radius: 12px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

/* ---- RESET ---- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-body);color:var(--gray-800);background:var(--white);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}

/* ---- UTILITIES ---- */
.container{width:100%;max-width:1120px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section--alt{background:var(--gray-50)}
.text-center{text-align:center}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}

/* ---- TYPOGRAPHY ---- */
h1,h2,h3{font-family:var(--font-display);color:var(--blue-900);line-height:1.25}
h1{font-size:clamp(2.2rem,5vw,3.4rem);font-weight:700}
h2{font-size:clamp(1.6rem,3.5vw,2.4rem);font-weight:600;margin-bottom:16px}
h3{font-size:1.15rem;font-weight:600;margin-bottom:8px}
p{color:var(--gray-600);max-width:640px}
.section-subtitle{color:var(--blue-500);font-weight:600;text-transform:uppercase;letter-spacing:.08em;font-size:.85rem;margin-bottom:8px}

/* ---- HEADER ---- */
.header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--gray-200);transition:var(--transition)}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-body);font-weight:700;color:var(--blue-900);font-size:1.35rem;letter-spacing:-.5px}
.logo__img{width:36px;height:36px;object-fit:contain}
.logo__text{display:flex;align-items:baseline;gap:0}
.logo__text sub{font-size:.6em;color:var(--cyan-400);font-weight:600;line-height:0}
.nav{display:flex;align-items:center;gap:8px}
.nav a{padding:8px 18px;border-radius:8px;font-size:.95rem;font-weight:500;color:var(--gray-700);transition:var(--transition)}
.nav a:hover{background:var(--blue-600);color:#fff}
.nav a.active{background:transparent;color:var(--blue-600);border:2px solid var(--blue-600);padding:6px 16px}
.nav__cta{background:var(--blue-600)!important;color:#fff!important;font-weight:600!important}

/* Mobile menu */
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.hamburger span{width:24px;height:2px;background:var(--blue-900);border-radius:2px;transition:var(--transition)}

/* ---- HERO ---- */
.hero{padding:160px 0 100px;background:linear-gradient(160deg,var(--blue-900) 0%,var(--blue-700) 50%,var(--blue-600) 100%);position:relative;overflow:hidden;background-size:cover;background-position:center}
.hero__content{position:relative;z-index:1;max-width:640px}
.hero__badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);border-radius:100px;color:var(--cyan-300);font-size:.85rem;font-weight:500;margin-bottom:24px;backdrop-filter:blur(4px)}
.hero__badge::before{content:'';width:8px;height:8px;background:var(--green-500);border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{color:#fff;margin-bottom:20px}
.hero h1 span{color:var(--cyan-400)}
.hero p{color:rgba(255,255,255,.75);font-size:1.1rem;margin-bottom:36px;max-width:520px}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap}

/* ---- BUTTONS ---- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:10px;font-family:var(--font-body);font-size:.95rem;font-weight:600;border:none;cursor:pointer;transition:var(--transition)}
.btn--primary{background:var(--cyan-400);color:var(--blue-900)}
.btn--primary:hover{background:var(--cyan-300);transform:translateY(-2px);box-shadow:0 8px 24px rgba(56,189,248,.3)}
.btn--outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.3)}
.btn--outline:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.btn--dark{background:var(--blue-600);color:#fff}
.btn--dark:hover{background:var(--blue-700);transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn--phone{background:var(--green-500);color:#fff}
.btn--phone:hover{background:#16a34a;transform:translateY(-2px)}

/* ---- SERVICES ---- */
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;margin-top:48px}
.service-card{background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius);padding:32px 28px;transition:var(--transition);position:relative;overflow:hidden}
.service-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--blue-600),var(--cyan-400));transform:scaleX(0);transform-origin:left;transition:var(--transition)}
.service-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:transparent}
.service-card:hover::before{transform:scaleX(1)}
.service-card__icon{width:52px;height:52px;background:linear-gradient(135deg,rgba(36,113,184,.1),rgba(56,189,248,.1));border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:20px}
.service-card p{font-size:.9rem;line-height:1.6}

/* ---- ATOUTS ---- */
.atouts-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:32px;margin-top:48px}
.atout{display:flex;gap:20px;align-items:flex-start}
.atout__number{flex-shrink:0;width:48px;height:48px;background:var(--blue-600);color:#fff;border-radius:12px;display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-weight:700;font-size:1.1rem}
.atout h3{color:var(--blue-900);margin-bottom:4px}
.atout p{font-size:.9rem}

/* ---- ABOUT ---- */
.about-content{max-width:800px;margin:32px auto 0;text-align:center}
.about-content p{margin:0 auto 16px;font-size:1.05rem;line-height:1.8;max-width:800px}

/* ---- CTA BAND ---- */
.cta-band{padding:60px 0;background:linear-gradient(135deg,var(--blue-800),var(--blue-600));text-align:center}
.cta-band h2{color:#fff;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.7);margin:0 auto 32px;font-size:1.05rem}
.cta-band__actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ---- CLIENTS ---- */
.clients-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;margin-top:48px}
.client-card{background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius);padding:28px;text-align:center;transition:var(--transition)}
.client-card:hover{box-shadow:var(--shadow-md);border-color:transparent}
.client-card__icon{font-size:2rem;margin-bottom:12px}
.client-card h3{font-size:1rem;color:var(--blue-900)}
.client-card p{font-size:.85rem;margin:4px auto 0}

/* ---- CONTACT FORM ---- */
.contact-layout{display:grid;grid-template-columns:1fr 1fr;gap:48px;margin-top:48px}
.contact-info{display:flex;flex-direction:column;gap:28px}
.contact-item{display:flex;gap:16px;align-items:flex-start}
.contact-item__icon{flex-shrink:0;width:48px;height:48px;background:linear-gradient(135deg,rgba(36,113,184,.1),rgba(56,189,248,.1));border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.3rem}
.contact-item h3{font-size:.95rem;color:var(--blue-900);margin-bottom:2px}
.contact-item p{font-size:.9rem}
.contact-item a{color:var(--blue-600);font-weight:500;transition:var(--transition)}
.contact-item a:hover{color:var(--cyan-400)}

.form{display:flex;flex-direction:column;gap:20px}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-size:.85rem;font-weight:600;color:var(--gray-700)}
.form-group input,.form-group textarea,.form-group select{padding:12px 16px;border:1.5px solid var(--gray-200);border-radius:10px;font-family:var(--font-body);font-size:.95rem;color:var(--gray-800);background:var(--gray-50);transition:var(--transition);outline:none}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--blue-500);background:#fff;box-shadow:0 0 0 3px rgba(36,113,184,.1)}
.form-group textarea{resize:vertical;min-height:140px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form__success{background:#dcfce7;border:1px solid #bbf7d0;color:#166534;padding:16px;border-radius:10px;font-weight:500;display:none}
.form__success.show{display:block}
.form__error{background:#fef2f2;border:1px solid #fecaca;color:#991b1b;padding:16px;border-radius:10px;font-weight:500;display:none}
.form__error.show{display:block}

/* ---- MAP ---- */
.map-container{margin-top:48px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--gray-200);box-shadow:var(--shadow-sm)}
.map-container iframe{width:100%;height:400px;border:0}

/* ---- FOOTER ---- */
.footer{background:var(--blue-900);color:rgba(255,255,255,.6);padding:48px 0 24px}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer__brand p{margin-top:12px;font-size:.9rem;max-width:320px}
.footer h4{color:#fff;font-family:var(--font-display);font-size:1rem;margin-bottom:16px}
.footer__links a{display:block;padding:4px 0;font-size:.9rem;transition:var(--transition)}
.footer__links a:hover{color:var(--cyan-400)}
.footer__contact-item{display:flex;gap:8px;align-items:center;font-size:.9rem;margin-bottom:8px}
.footer__bar{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;text-align:center;font-size:.8rem}

/* ---- ANIMATIONS ---- */
.fade-in{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* ---- RESPONSIVE ---- */
@media(max-width:768px){
  .hamburger{display:flex}
  .nav{position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:16px;gap:4px;border-bottom:1px solid var(--gray-200);transform:translateY(-120%);transition:var(--transition);box-shadow:var(--shadow-md);visibility:hidden}
  .nav.open{transform:translateY(0);visibility:visible}
  .nav a{width:100%;text-align:center;padding:12px}
  .hero{padding:120px 0 60px}
  .hero__actions{flex-direction:column}
  .btn{width:100%;justify-content:center}
  .contact-layout{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr;gap:32px}
  .section{padding:60px 0}
  .atouts-grid{grid-template-columns:1fr}
}