/* Base commune : thème néon de la proposition 1 */
:root{
  --bg:#0B0714; --bg2:#140C24; --card:#1B1230; --line:rgba(255,255,255,.10);
  --text:#F4EEFF; --muted:#B9AED3;
  --violet:#8B5CF6; --pink:#FF7A1A; --cyan:#22D3EE;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font:400 17px/1.6 "Source Sans 3",system-ui,sans-serif;overflow-x:hidden}
a{color:inherit}
button{font:inherit;color:inherit}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.todo{background:rgba(255,122,26,.16);border:1px dashed var(--pink);color:#FFD2B0;padding:0 6px;border-radius:4px;font-weight:600;white-space:nowrap}

nav.top{position:sticky;top:0;z-index:20;background:rgba(11,7,20,.78);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
nav.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-family:"Bebas Neue";font-size:30px;letter-spacing:1px;text-decoration:none}
.logo span{color:var(--pink);text-shadow:0 0 12px var(--pink)}
.navlinks{display:flex;gap:28px;align-items:center}
.navlinks a{text-decoration:none;color:var(--muted);font-weight:600}
.navlinks a:hover{color:var(--text)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--pink);color:#1A0B00;text-decoration:none;font-weight:700;padding:12px 22px;border-radius:999px;box-shadow:0 0 24px rgba(255,122,26,.45);transition:transform .2s,box-shadow .2s;cursor:pointer;border:0}
.btn:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(255,122,26,.7)}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line);box-shadow:none}
.navlinks a.btn,.navlinks a.btn:hover{color:#1A0B00}
.btn.ghost:hover{border-color:var(--cyan)}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}

.hero{position:relative;min-height:min(80vh,720px);display:grid;place-items:center;text-align:center;overflow:hidden;padding:80px 0 110px}
.beams{position:absolute;inset:0;pointer-events:none;-webkit-mask-image:linear-gradient(to bottom,#000 55%,transparent 97%);mask-image:linear-gradient(to bottom,#000 55%,transparent 97%)}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:140px;background:linear-gradient(to bottom,transparent,var(--bg2));pointer-events:none}
.beam{position:absolute;bottom:-10%;width:520px;margin-left:-150px;height:130%;transform-origin:50% 100%;opacity:.7;mix-blend-mode:screen;background:conic-gradient(from -10deg at 50% 100%,transparent 0deg,var(--c) 5deg,var(--c) 15deg,transparent 20deg,transparent 360deg);-webkit-mask-image:linear-gradient(to top,#000 10%,transparent 85%);mask-image:linear-gradient(to top,#000 10%,transparent 85%)}
.beam.b1{left:12%;--c:var(--violet);animation:sweep 7s ease-in-out infinite}
.beam.b2{left:44%;--c:var(--cyan);animation:sweep 9s ease-in-out infinite reverse}
.beam.b3{right:12%;margin-left:0;margin-right:-150px;--c:var(--pink);animation:sweep 8s ease-in-out infinite;animation-delay:-3s}
@keyframes sweep{0%,100%{transform:rotate(-24deg)}50%{transform:rotate(24deg)}}
.smoke{position:absolute;left:-10%;right:-10%;bottom:-40px;height:260px;background:radial-gradient(60% 100% at 50% 100%,rgba(185,174,211,.22),transparent 70%);filter:blur(20px)}
.hero h1{font-family:"Bebas Neue";font-weight:400;font-size:clamp(56px,11vw,124px);line-height:.9;letter-spacing:1px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#A78BFA,#F472B6 50%,#FB923C);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 14px rgba(244,114,182,.55)) drop-shadow(0 0 34px rgba(167,139,250,.35))}
.hero p{max-width:560px;margin:22px auto 30px;color:var(--muted);font-size:19px}
.ctas{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.eyebrow{display:inline-block;margin-bottom:18px;padding:6px 14px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:14px;letter-spacing:.08em;text-transform:uppercase}
.trust{display:flex;gap:10px 22px;justify-content:center;flex-wrap:wrap;margin-top:26px;color:var(--muted);font-weight:600;font-size:15px}
.trust span{display:flex;gap:8px;align-items:center}
.trust svg{width:18px;height:18px;stroke:var(--cyan)}

section{padding:92px 0}
section.alt{background:var(--bg2)}
h2{font-family:"Bebas Neue";font-weight:400;font-size:clamp(40px,6vw,62px);line-height:1;margin-bottom:12px}
.lead{color:var(--muted);max-width:620px;margin-bottom:40px}
.center{text-align:center}.center .lead{margin-left:auto;margin-right:auto}

/* étapes en cartes (inspiré de la proposition 2) */
.easy{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.easy > div{background:linear-gradient(180deg,var(--card),var(--bg2));border:1px solid var(--line);border-radius:20px;padding:26px}
.easy b{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;font-family:"Bebas Neue";font-size:26px;font-weight:400;margin-bottom:14px;background:var(--pink);box-shadow:0 0 18px rgba(255,122,26,.5)}
.easy > div:nth-child(2) b{background:var(--violet);box-shadow:0 0 18px rgba(139,92,246,.5)}
.easy > div:nth-child(3) b{background:var(--cyan);color:#062028;box-shadow:0 0 18px rgba(34,211,238,.5)}
.easy > div:nth-child(4) b{background:#F4EEFF;color:var(--bg)}
.easy h3{font-size:20px;margin-bottom:4px}
.easy p{color:var(--muted)}

/* liste à coches (inspirée de la proposition 2) */
.checks{list-style:none;display:grid;gap:10px}
.checks li{padding-left:30px;position:relative}
.checks li::before{content:"";position:absolute;left:0;top:4px;width:20px;height:20px;border-radius:6px;background:var(--cyan) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23062028' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/14px no-repeat;box-shadow:0 0 10px rgba(34,211,238,.6)}

/* FAQ en boîtes (inspirée de la proposition 2) */
.faq{max-width:800px;margin:0 auto}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px 22px;margin-bottom:12px}
.faq details[open]{border-color:rgba(139,92,246,.6)}
.faq summary{cursor:pointer;font-weight:700;font-size:18px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::after{content:"+";color:var(--cyan);font-size:24px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--muted);margin-top:8px}

.contact{background:radial-gradient(70% 120% at 50% 0%,rgba(139,92,246,.35),transparent 70%)}
footer.end{border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:15px}
footer.end .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

@media (max-width:720px){
  .navlinks a:not(.btn){display:none}
  .navlinks{gap:12px}
  section{padding:70px 0}
  .beam{width:140px}
}
@media (prefers-reduced-motion:reduce){.beam{animation:none}*{transition:none!important}}

/* Thème clair : suit le réglage de l'appareil, sauf si le visiteur a choisi avec le bouton (data-theme) */
@media (prefers-color-scheme:light){
  :root:not([data-theme=dark]){--bg:#F3EFF8;--bg2:#EAE4F2;--card:#F9F7FC;--line:rgba(40,20,80,.13);--text:#1E1433;--muted:#5A5072;--violet:#7C3AED;--pink:#F26A0A;--cyan:#0891B2}
  :root:not([data-theme=dark]) nav.top{background:rgba(243,239,248,.85)}
  :root:not([data-theme=dark]) .hero h1 em{background:linear-gradient(90deg,#7C3AED,#DB2777 50%,#F26A0A);-webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:none;filter:drop-shadow(0 6px 18px rgba(219,39,119,.35))}
  :root:not([data-theme=dark]) .easy > div:nth-child(4) b{background:#1E1433;color:#fff}
  :root:not([data-theme=dark]) .smoke{opacity:.5}
  :root:not([data-theme=dark]) .todo{color:#9A3F00}
}
:root[data-theme=light]{--bg:#F3EFF8;--bg2:#EAE4F2;--card:#F9F7FC;--line:rgba(40,20,80,.13);--text:#1E1433;--muted:#5A5072;--violet:#7C3AED;--pink:#F26A0A;--cyan:#0891B2}
:root[data-theme=light] nav.top{background:rgba(243,239,248,.85)}
:root[data-theme=light] .hero h1 em{background:linear-gradient(90deg,#7C3AED,#DB2777 50%,#F26A0A);-webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:none;filter:drop-shadow(0 6px 18px rgba(219,39,119,.35))}
:root[data-theme=light] .easy > div:nth-child(4) b{background:#1E1433;color:#fff}
:root[data-theme=light] .smoke{opacity:.5}
:root[data-theme=light] .todo{color:#9A3F00}

/* Bouton clair / sombre */
.theme-btn{-webkit-appearance:none;appearance:none;padding:0;display:grid;place-items:center;width:40px;height:40px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--text);cursor:pointer;transition:background .2s,transform .3s}
.theme-btn:hover{background:var(--card)}
.theme-btn:active{transform:rotate(30deg) scale(.92)}
.theme-btn svg{width:20px;height:20px}
.theme-btn .sun{display:none}
:root[data-theme=dark] .theme-btn .sun{display:block}:root[data-theme=dark] .theme-btn .moon{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .theme-btn .sun{display:block}:root:not([data-theme=light]) .theme-btn .moon{display:none}}

/* Animation au changement de thème : cercle qui s'étend depuis le bouton (ou fondu si non pris en charge) */
::view-transition-old(root),::view-transition-new(root){animation:none;mix-blend-mode:normal}
.theme-anim,.theme-anim *,.theme-anim *::before,.theme-anim *::after{transition:background-color .45s ease,color .45s ease,border-color .45s ease,fill .45s ease!important}
.theme-btn svg{animation:tb-in .5s cubic-bezier(.34,1.4,.5,1)}
@keyframes tb-in{from{transform:rotate(-120deg) scale(.3);opacity:0}to{transform:none;opacity:1}}