/* =========================================================
   IDENTITÉ VISUELLE — Génie Civil / Formation
   Palette inspirée béton / acier / plan technique
   ========================================================= */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@500;600&display=swap');

:root{
    /* Structure / graphite */
    --ardoise-900:#111a2b;
    --ardoise-800:#182640;
    --ardoise-700:#22375c;
    --acier-500:#3d5c85;
    --acier-300:#8fa6c4;
    --acier-100:#dbe4ef;

    /* Accent sécurité (utilisé avec parcimonie) */
    --orange-accent:#c85e0d;
    --orange-clair:#e07a1f;

    /* Fond béton */
    --gris-fond:#f2f0ea;
    --beton-100:#e8e4da;
    --gris-texte:#1b1d1f;
    --blanc:#ffffff;

    /* Compat / anciens alias conservés */
    --bleu-principal:var(--ardoise-900);
    --bleu-clair:var(--acier-500);

    --radius:6px;
    --ombre:0 1px 2px rgba(17,26,43,.06), 0 6px 20px rgba(17,26,43,.08);
    --ombre-hover:0 10px 30px rgba(17,26,43,.14);

    --police-titre:'Space Grotesk',Arial,sans-serif;
    --police-texte:'Inter','Segoe UI',Arial,sans-serif;
    --police-data:'JetBrains Mono',ui-monospace,Consolas,monospace;
}
*{box-sizing:border-box}
body{
    margin:0;
    font-family:var(--police-texte);
    color:var(--gris-texte);
    background-color:var(--gris-fond);
    background-image:
        linear-gradient(rgba(61,92,133,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(61,92,133,.06) 1px, transparent 1px);
    background-size:40px 40px;
    line-height:1.65;
     -webkit-font-smoothing:antialiased;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-family:var(--police-titre);letter-spacing:-.01em}
:focus-visible{outline:2px solid var(--orange-accent);outline-offset:2px}

/* HEADER */
header.site-header{
    background:var(--ardoise-900);
    color:#fff;
    position:sticky;
    top:0;
    z-index:1000;
    box-shadow:0 1px 0 rgba(255,255,255,.06), 0 4px 16px rgba(0,0,0,.25);
    border-bottom:3px solid var(--orange-accent)
}
.header-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:14px 20px}
.logo{font-family:var(--police-titre);font-size:1.5rem;font-weight:700;color:#fff;letter-spacing:.2px}
.logo span{color:var(--orange-accent)}
nav.main-menu > ul{display:flex;list-style:none;margin:0;padding:0;gap:2px}
nav.main-menu a{
    display:block;
    padding:9px 16px;
    border-radius:4px;
    font-weight:600;
    font-size:.88rem;
    color:var(--acier-300);
    transition:color .18s;
    position:relative;
    text-transform:uppercase;
    letter-spacing:.03em
}
nav.main-menu a:hover,nav.main-menu a.active{color:#fff}
nav.main-menu a.active::after{
    content:'';
    position:absolute;
    bottom:-16px;
    left:16px;
    right:16px;
    height:3px;
    background:var(--orange-accent);
    border-radius:0
}
.menu-toggle{display:none;background:none;border:none;color:#fff;font-size:1.8rem;cursor:pointer}
@media(max-width:820px){
    .menu-toggle{display:block}
    nav.main-menu{display:none;width:100%}
    nav.main-menu.open{display:block}
    nav.main-menu ul{flex-direction:column;padding:10px 0}
    nav.main-menu a.active::after{display:none}
    .header-inner{flex-wrap:wrap}
}

/* HERO */
.hero{
    position:relative;
    background:
        linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px),
        linear-gradient(135deg, var(--ardoise-900) 0%, var(--ardoise-700) 100%);
    background-size:36px 36px, 36px 36px, cover;
    color:#fff;
    padding:96px 20px 88px;
    text-align:center;
    overflow:hidden
}
.hero::after{
    content:'';
    position:absolute;
    left:0;right:0;bottom:0;
    height:4px;
    background:repeating-linear-gradient(90deg, var(--orange-accent) 0 24px, transparent 24px 40px)
}
.hero h1{font-size:2.6rem;margin-bottom:16px;font-weight:700;letter-spacing:-.02em}
.hero p{font-family:var(--police-texte);font-size:1.08rem;max-width:680px;margin:0 auto 32px;color:var(--acier-100)}

/* BOUTONS */
.btn{display:inline-block;padding:13px 30px;border-radius:4px;font-weight:700;cursor:pointer;border:none;transition:all .15s;font-size:.9rem;text-transform:uppercase;letter-spacing:.04em;font-family:var(--police-texte)}
.btn-orange{background:var(--orange-accent);color:#fff}
.btn-orange:hover{background:var(--orange-clair);transform:translateY(-2px);box-shadow:0 6px 16px rgba(200,94,13,.35)}
.btn-outline{background:transparent;border:2px solid rgba(255,255,255,.55);color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-small{padding:8px 16px;font-size:.78rem}

/* SECTIONS */
.section{max-width:1200px;margin:0 auto;padding:70px 20px}
.section-title{
    text-align:center;font-size:1.85rem;color:var(--ardoise-900);
    margin:0 0 16px;font-weight:700;position:relative;padding-bottom:20px
}
.section-title::after{
    content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);
    width:64px;height:3px;background:var(--orange-accent)
}
.section-subtitle{text-align:center;color:var(--acier-500);margin-bottom:44px;max-width:650px;margin-left:auto;margin-right:auto;font-size:.96rem}

/* CARDS */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:900px){.grid-3{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.grid-3{grid-template-columns:1fr}}

.card{
    position:relative;
    background:#fff;
    border-radius:var(--radius);
    box-shadow:var(--ombre);
    border:1px solid var(--acier-100);
    overflow:hidden;
    display:flex;
    flex-direction:column;
    transition:transform .2s,box-shadow .2s
}
.card:hover{transform:translateY(-4px);box-shadow:var(--ombre-hover)}
/* repère d'angle façon plan technique */
.card::before,.card::after{
    content:'';position:absolute;top:10px;width:10px;height:10px;
    border-top:2px solid rgba(255,255,255,.85);z-index:2;pointer-events:none
}
.card::before{left:10px;border-left:2px solid rgba(255,255,255,.85)}
.card::after{right:10px;border-right:2px solid rgba(255,255,255,.85)}
.card-img{
    height:160px;
    background:
        repeating-linear-gradient(135deg, rgba(255,255,255,.05) 0 2px, transparent 2px 14px),
        linear-gradient(135deg,var(--ardoise-900),var(--acier-500));
    display:flex;
    align-items:center;
    justify-content:center;
    color:#fff;
    font-size:2.4rem
}
.card-body{padding:22px;flex:1;display:flex;flex-direction:column}
.card-body h3{margin:0 0 8px;color:var(--ardoise-900);font-size:1.02rem;font-weight:700;font-family:var(--police-titre)}
.card-body h3 a{color:var(--acier-500);text-decoration:underline}
.card-body p{flex:1;color:#4b5768;font-size:.9rem}
.card-footer{display:flex;justify-content:space-between;align-items:center;margin-top:16px;padding-top:14px;border-top:1px dashed var(--acier-100)}
.prix{font-family:var(--police-data);font-size:1.15rem;font-weight:700;color:var(--ardoise-900)}
.badge{display:inline-block;background:var(--acier-100);color:var(--ardoise-700);padding:4px 10px;border-radius:3px;font-size:.7rem;font-weight:700;margin-bottom:9px;text-transform:uppercase;letter-spacing:.04em}

/* FORMATEUR */
.formateur-block{display:flex;gap:44px;align-items:center;flex-wrap:wrap}
.formateur-photo{
    flex:0 0 260px;height:300px;
    background:linear-gradient(135deg,var(--ardoise-900),var(--acier-500));
    border-radius:var(--radius);
    display:flex;align-items:center;justify-content:center;
    color:#fff;font-size:3.6rem;
    box-shadow:var(--ombre);
    position:relative
}
.formateur-photo::before{
    content:'';position:absolute;inset:10px;border:1px solid rgba(255,255,255,.35)
}
.formateur-texte{flex:1;min-width:280px}
.formateur-texte h2{color:var(--ardoise-900);font-weight:700}
.signature{margin-top:22px;font-style:italic;font-weight:700;color:var(--orange-accent);font-family:var(--police-titre)}

/* CRENEAUX */
.creneaux-liste{display:flex;flex-direction:column;gap:12px}
.creneau-item{
    background:#fff;
    border:1px solid var(--acier-100);
    border-left:3px solid var(--acier-500);
    border-radius:var(--radius);
    padding:17px 22px;
    display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
    box-shadow:var(--ombre);
    transition:box-shadow .2s, border-left-color .2s
}
.creneau-item:hover{box-shadow:var(--ombre-hover);border-left-color:var(--orange-accent)}
.creneau-info strong{color:var(--ardoise-900);font-size:1rem;font-weight:700;font-family:var(--police-titre)}
.creneau-date{
    font-family:var(--police-data);
    background:var(--ardoise-900);
    color:#fff;padding:8px 14px;
    border-radius:4px;font-weight:600;
    text-align:center;min-width:80px;font-size:.86rem
}
.creneau-complet{opacity:.5}

/* FORMULAIRES */
.form-box{
    background:#fff;
    border:1px solid var(--acier-100);
    border-radius:var(--radius);
    box-shadow:var(--ombre);
    padding:30px;max-width:500px;margin:0 auto
}
.form-box label{display:block;margin:15px 0 6px;font-weight:700;color:var(--ardoise-900);font-size:.86rem;text-transform:uppercase;letter-spacing:.03em}
.form-box input,.form-box select,.form-box textarea{
    width:100%;padding:11px;
    border:1px solid var(--acier-100);
    border-radius:4px;font-size:1rem;color:var(--gris-texte);background:#fff;
    font-family:var(--police-texte)
}
.form-box input:focus,.form-box select:focus,.form-box textarea:focus{
    outline:none;border-color:var(--acier-500);
    box-shadow:0 0 0 3px rgba(61,92,133,.14)
}
.form-box .btn{width:100%;margin-top:22px}

/* ALERTES */
.alert{padding:14px 18px;border-radius:var(--radius);margin-bottom:20px;font-weight:600;border-left:3px solid transparent}
.alert-success{background:#f0fdf4;color:#166534;border-color:#22c55e}
.alert-error{background:#fef2f2;color:#991b1b;border-color:#ef4444}

/* FOOTER */
footer.site-footer{background:var(--ardoise-900);color:var(--acier-300);padding:56px 20px 22px;margin-top:70px;border-top:3px solid var(--orange-accent)}
.footer-inner{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;flex-wrap:wrap;gap:32px}
.footer-col{flex:1;min-width:220px}
.footer-col h4{color:#fff;margin-bottom:16px;font-weight:700;font-family:var(--police-titre);text-transform:uppercase;font-size:.85rem;letter-spacing:.04em}
.footer-col ul{list-style:none;padding:0}
.footer-col li{margin-bottom:9px;font-size:.9rem}
.footer-col a:hover{color:var(--orange-accent)}
.footer-bottom{text-align:center;margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);font-size:.82rem;color:var(--acier-500)}

/* VIDEO */
.video-player-wrap{background:#000;border-radius:var(--radius);overflow:hidden;margin-bottom:20px;border:1px solid var(--acier-100)}
.video-player-wrap video{width:100%;display:block}

/* ADMIN */
.admin-shell{display:flex;min-height:100vh;background:var(--gris-fond)}
.admin-sidebar{width:230px;background:var(--ardoise-900);color:var(--acier-300);padding:26px 0;flex-shrink:0}
.admin-sidebar .logo-admin{font-family:var(--police-titre);font-size:1.25rem;font-weight:700;padding:0 22px 22px;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:16px;color:#fff}
.admin-sidebar .logo-admin span{color:var(--orange-accent)}
.admin-sidebar a{display:block;padding:11px 22px;color:#93a3ba;font-weight:600;font-size:.88rem;transition:all .2s}
.admin-sidebar a:hover,.admin-sidebar a.active{background:rgba(255,255,255,.07);color:#fff;border-left:3px solid var(--orange-accent)}
.admin-sidebar .logout{margin-top:32px;color:#f87171}
.admin-content{flex:1;padding:38px 42px;max-width:1100px}
.admin-content h1{color:var(--ardoise-900);margin-top:0;font-weight:700}
.admin-card{background:#fff;border:1px solid var(--acier-100);border-radius:var(--radius);box-shadow:var(--ombre);padding:26px;margin-bottom:26px}
table.admin-table{width:100%;border-collapse:collapse}
table.admin-table th,table.admin-table td{text-align:left;padding:11px 12px;border-bottom:1px solid #f1f0ec;font-size:.9rem;font-family:var(--police-data)}
table.admin-table th{color:var(--ardoise-900);font-weight:700;background:var(--beton-100);font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;font-family:var(--police-texte)}
table.admin-table tr:hover{background:#faf9f6}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:26px}
.stat-box{position:relative;background:#fff;border:1px solid var(--acier-100);border-radius:var(--radius);box-shadow:var(--ombre);padding:22px;text-align:center;border-top:3px solid var(--orange-accent)}
.stat-box .nb{font-family:var(--police-data);font-size:1.9rem;font-weight:700;color:var(--ardoise-900)}
.stat-box .label{color:var(--acier-500);font-size:.78rem;margin-top:5px;text-transform:uppercase;letter-spacing:.04em}
.tag-paye{color:#166534;font-weight:700}
.tag-attente{color:#92400e;font-weight:700}
.tag-echoue{color:#991b1b;font-weight:700}
.btn-danger{background:#b91c1c;color:#fff;border-radius:4px}
.btn-danger:hover{background:#991616}

/* Inputs globaux */
input,select,textarea{background:#fff;color:var(--gris-texte);border:1px solid var(--acier-100);border-radius:4px;padding:10px;font-size:1rem;font-family:var(--police-texte)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--acier-500);box-shadow:0 0 0 3px rgba(61,92,133,.14)}
select option{background:#fff;color:var(--gris-texte)}

@media(max-width:800px){.admin-shell{flex-direction:column}.admin-sidebar{width:100%}.stat-grid{grid-template-columns:1fr 1fr}}