/************************************************************
REFERENCES (design inspiration / patterns):

* [https://www.awwwards.com/websites/white/](https://www.awwwards.com/websites/white/)
* [https://www.awwwards.com/websites/minimal/](https://www.awwwards.com/websites/minimal/)
* [https://www.cssdesignawards.com/](https://www.cssdesignawards.com/)
* [https://cssnectar.com/](https://cssnectar.com/)
* [https://www.heights.agency/](https://www.heights.agency/)
* [https://bornfight.studio/](https://bornfight.studio/)
* [https://companion.uprock.pro/](https://companion.uprock.pro/)
* [https://odins-crow.com/](https://odins-crow.com/)
  ************************************************************/

@import url("[https://fonts.googleapis.com/css2?family=Newsreader:opsz,wght@6..72,500;6..72,600&family=Plus+Jakarta+Sans:wght@400;600;700&display=swap](https://fonts.googleapis.com/css2?family=Newsreader:opsz,wght@6..72,500;6..72,600&family=Plus+Jakarta+Sans:wght@400;600;700&display=swap)");

/* ============== */
/* Reset (léger)  */
/* ============== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; }
img, svg { max-width: 100%; display: block; }
input, button, textarea, select { font: inherit; }
button { border: 0; background: none; color: inherit; }
a { color: inherit; text-decoration: none; }
:focus { outline: none; }
::selection { background: rgba(29, 78, 216, .18); }

/* ================= */
/* Design system     */
/* ================= */
:root{
/* Fonts */
--font-sans: "Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
--font-serif: "Newsreader", ui-serif, Georgia, "Times New Roman", serif;

/* Colors (premium clair) */
--bg: #fbfaf7;               /* blanc cassé chaud */
--surface: #ffffff;          /* surface */
--surface-2: #f6f4ee;        /* surface douce */
--ink: #121826;              /* texte principal */
--muted: #4b5563;            /* texte secondaire */
--muted-2: #6b7280;          /* micro-text */
--line: rgba(18,24,38,.12);  /* bordures */
--line-2: rgba(18,24,38,.08);

--accent: #1d4ed8;           /* CTA */
--accent-ink: #ffffff;

/* Shadows (subtiles mais “premium”) */
--shadow-sm: 0 1px 0 rgba(18,24,38,.06), 0 10px 24px rgba(18,24,38,.06);
--shadow-md: 0 1px 0 rgba(18,24,38,.08), 0 18px 50px rgba(18,24,38,.10);
--shadow-lg: 0 1px 0 rgba(18,24,38,.10), 0 28px 90px rgba(18,24,38,.12);

/* Radius */
--r-sm: 10px;
--r-md: 14px;
--r-lg: 18px;
--r-pill: 999px;

/* Spacing */
--gutter: clamp(16px, 4vw, 28px);
--space-1: 6px;
--space-2: 10px;
--space-3: 14px;
--space-4: 18px;
--space-5: 24px;
--space-6: 32px;
--space-7: 44px;
--space-8: 64px;
--space-9: 88px;

/* Type scale */
--text: 16px;
--lh: 1.6;
--lead: clamp(18px, 1.15vw + 14px, 22px);
--small: 13px;

/* Motion */
--ease: cubic-bezier(.2,.8,.2,1);
--dur-1: 140ms;
--dur-2: 220ms;
--dur-3: 420ms;

/* Layout */
--container: 1120px;
--measure: 74ch; /* 65–75ch */
}

@media (prefers-color-scheme: light){
:root { color-scheme: light; }
}

/* ================= */
/* Base typography    */
/* ================= */
html{
font-family: var(--font-sans);
font-size: var(--text);
background: var(--bg);
color: var(--ink);
}

body{
line-height: var(--lh);
letter-spacing: -0.01em;
}

p{ margin: 0 0 1em; color: var(--muted); }
strong{ color: var(--ink); font-weight: 700; }
code{
font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
font-size: .92em;
background: rgba(18,24,38,.06);
padding: 0 .35em;
border-radius: 8px;
}

.h1, h1{
font-family: var(--font-serif);
font-weight: 600;
letter-spacing: -0.02em;
line-height: 1.05;
color: var(--ink);
margin: 0 0 .35em;
font-size: clamp(2.25rem, 3.2vw + 1rem, 3.6rem);
}

.h2, h2{
font-family: var(--font-serif);
font-weight: 600;
letter-spacing: -0.01em;
line-height: 1.15;
color: var(--ink);
margin: 0 0 .5em;
font-size: clamp(1.55rem, 1.2vw + 1.1rem, 2.15rem);
}

h3{
font-weight: 700;
letter-spacing: -0.01em;
line-height: 1.2;
margin: 0 0 .4em;
font-size: 1.05rem;
color: var(--ink);
}

.lead{ font-size: var(--lead); color: var(--ink); letter-spacing: -0.012em; }
.sublead{ font-size: 1rem; color: var(--muted); }
.small, .footer-small, .hint{ font-size: var(--small); color: var(--muted-2); }
.muted{ color: var(--muted-2); }

a{
text-underline-offset: .25em;
text-decoration-thickness: 1px;
}
a:hover{
text-decoration: underline;
text-decoration-color: rgba(29,78,216,.55);
}

/* ================= */
/* Utilities          */
/* ================= */
.container{
width: min(var(--container), calc(100% - (var(--gutter) * 2)));
margin-inline: auto;
}

.hr{
height: 1px;
background: var(--line-2);
margin: var(--space-6) 0;
}

.section{
padding: var(--space-8) 0;
}
.section.tight{ padding: var(--space-7) 0; }
.section.soft{
background:
radial-gradient(900px 240px at 12% 10%, rgba(29,78,216,.10), transparent 55%),
radial-gradient(800px 220px at 92% 35%, rgba(29,78,216,.07), transparent 60%),
linear-gradient(180deg, rgba(18,24,38,.03), transparent 60%);
border-top: 1px solid var(--line-2);
border-bottom: 1px solid var(--line-2);
}

.list-plain{
list-style: none;
padding: 0;
margin: 0;
}
.list-plain li{
padding: .35rem 0;
color: var(--muted);
}
.list-plain li strong{ color: var(--ink); }

.kicker{
display: inline-flex;
align-items: center;
gap: .55rem;
margin: 0 0 var(--space-3);
font-size: 13px;
color: var(--muted-2);
letter-spacing: .08em;
text-transform: uppercase;
}
.kicker::before{
content:"";
width: 12px;
height: 12px;
border-radius: 3px;
background: rgba(29,78,216,.14);
box-shadow: inset 0 0 0 1px rgba(29,78,216,.28);
}

/* Reveal micro-interaction */
.reveal{
opacity: 0;
transform: translateY(12px);
transition: opacity var(--dur-3) var(--ease), transform var(--dur-3) var(--ease);
will-change: opacity, transform;
}
.reveal.is-visible{
opacity: 1;
transform: translateY(0);
}

/* ================= */
/* Skip-link          */
/* ================= */
.skip-link{
position: absolute;
left: 12px;
top: 10px;
padding: 10px 12px;
border-radius: var(--r-sm);
background: var(--surface);
box-shadow: var(--shadow-sm);
transform: translateY(-140%);
transition: transform var(--dur-2) var(--ease);
z-index: 9999;
color: var(--ink);
}
.skip-link:focus-visible{
transform: translateY(0);
outline: 3px solid rgba(29,78,216,.35);
outline-offset: 2px;
}

/* ================= */
/* Header / Nav       */
/* ================= */
.site-header{
position: sticky;
top: 0;
z-index: 2000;
background: rgba(251,250,247,.92);
border-bottom: 1px solid var(--line-2);
backdrop-filter: saturate(1.1);
}

.header-inner{
display: grid;
grid-template-columns: 1fr auto auto;
align-items: center;
gap: var(--space-4);
padding: 14px 0;
}

.brand{
display: inline-flex;
align-items: center;
gap: 12px;
min-width: 0;
}
.brand-mark{
width: 38px;
height: 38px;
border-radius: 12px;
display: grid;
place-items: center;
background: var(--surface);
box-shadow: 0 1px 0 rgba(18,24,38,.06), 0 12px 26px rgba(18,24,38,.08);
border: 1px solid var(--line-2);
color: var(--accent);
transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease);
}
.brand:hover .brand-mark{
transform: translateY(-1px);
box-shadow: 0 1px 0 rgba(18,24,38,.06), 0 18px 44px rgba(18,24,38,.12);
}
.brand-name{
display: grid;
gap: 2px;
min-width: 0;
}
.brand-name strong{
font-weight: 800;
letter-spacing: -0.02em;
color: var(--ink);
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
.brand-name span{
font-size: 13px;
color: var(--muted-2);
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}

.site-nav{
display: flex;
gap: 18px;
align-items: center;
}
.site-nav a{
position: relative;
padding: 10px 2px;
font-size: 14px;
color: rgba(18,24,38,.82);
letter-spacing: -0.01em;
text-decoration: none;
transition: color var(--dur-1) var(--ease);
}
.site-nav a::after{
content:"";
position: absolute;
left: 0;
right: 0;
bottom: 6px;
height: 1.5px;
border-radius: 2px;
background: rgba(29,78,216,.9);
transform: scaleX(0);
transform-origin: left;
transition: transform var(--dur-2) var(--ease), opacity var(--dur-2) var(--ease);
opacity: .0;
}
.site-nav a:hover{
color: var(--ink);
}
.site-nav a:hover::after{
transform: scaleX(1);
opacity: .55;
}
.site-nav a[aria-current="page"]{
color: var(--ink);
font-weight: 700;
}
.site-nav a[aria-current="page"]::after{
transform: scaleX(1);
opacity: .95;
}

.header-cta{
display: inline-flex;
gap: 10px;
align-items: center;
}

.nav-toggle{
display: none;
padding: 10px 10px;
border-radius: 12px;
border: 1px solid var(--line-2);
background: var(--surface);
box-shadow: 0 1px 0 rgba(18,24,38,.05);
transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease);
}
.nav-toggle:hover{
transform: translateY(-1px);
box-shadow: var(--shadow-sm);
}
.bars{
display: grid;
gap: 5px;
}
.bars span{
width: 18px;
height: 2px;
border-radius: 10px;
background: rgba(18,24,38,.78);
transition: transform var(--dur-2) var(--ease), opacity var(--dur-2) var(--ease);
}
.nav-toggle.is-open .bars span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open .bars span:nth-child(2){ opacity: 0; }
.nav-toggle.is-open .bars span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 980px){
.header-inner{
grid-template-columns: 1fr auto;
grid-template-areas:
"brand toggle"
"nav nav"
"cta cta";
align-items: center;
}
.brand{ grid-area: brand; }
.nav-toggle{ grid-area: toggle; display: inline-flex; justify-self: end; }
.site-nav{
grid-area: nav;
flex-direction: column;
align-items: flex-start;
gap: 8px;
padding: 10px 12px 12px;
border: 1px solid var(--line-2);
background: var(--surface);
border-radius: var(--r-md);
box-shadow: var(--shadow-sm);
max-height: 0;
overflow: hidden;
opacity: 0;
transform: translateY(-6px);
transition: max-height var(--dur-3) var(--ease), opacity var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);
}
.site-nav.is-open{
max-height: 520px;
opacity: 1;
transform: translateY(0);
}
.site-nav a{
width: 100%;
padding: 10px 10px;
border-radius: 10px;
}
.site-nav a:hover{
background: rgba(18,24,38,.04);
text-decoration: none;
}
.site-nav a::after{ display: none; }

.header-cta{
grid-area: cta;
justify-content: flex-start;
padding-top: 10px;
}
}

/* ================= */
/* Buttons            */
/* ================= */
.btn{
display: inline-flex;
align-items: center;
justify-content: center;
gap: 10px;
padding: 12px 16px;
border-radius: var(--r-pill);
font-weight: 700;
letter-spacing: -0.01em;
text-decoration: none;
border: 1px solid transparent;
cursor: pointer;
user-select: none;
transition:
transform var(--dur-2) var(--ease),
box-shadow var(--dur-2) var(--ease),
background-color var(--dur-2) var(--ease),
border-color var(--dur-2) var(--ease),
color var(--dur-2) var(--ease);
}

.btn.small{
padding: 10px 12px;
font-size: 14px;
}

.btn.primary{
color: var(--accent-ink);
background: var(--accent);
box-shadow: 0 1px 0 rgba(18,24,38,.08), 0 18px 44px rgba(29,78,216,.18);
}
.btn.primary:hover{
transform: translateY(-2px);
box-shadow: 0 1px 0 rgba(18,24,38,.08), 0 26px 70px rgba(29,78,216,.24);
text-decoration: none;
}
.btn.primary:active{ transform: translateY(-1px); }

.btn.ghost{
color: var(--ink);
background: rgba(255,255,255,.72);
border-color: rgba(18,24,38,.14);
box-shadow: 0 1px 0 rgba(18,24,38,.05);
}
.btn.ghost:hover{
transform: translateY(-2px);
box-shadow: var(--shadow-sm);
border-color: rgba(18,24,38,.20);
text-decoration: none;
}

.btn:focus-visible{
outline: 3px solid rgba(29,78,216,.35);
outline-offset: 3px;
}

/* ================= */
/* Page head / crumbs */
/* ================= */
.page-head{
padding: var(--space-8) 0 var(--space-6);
}
.breadcrumb{
margin: 0 0 var(--space-3);
font-size: 13px;
color: var(--muted-2);
}
.breadcrumb a{
color: rgba(18,24,38,.78);
}
.breadcrumb a:hover{
color: var(--ink);
}
.page-head .sublead{
max-width: var(--measure);
}

/* ================= */
/* Hero               */
/* ================= */
.hero{
padding: clamp(44px, 5.5vw, 78px) 0;
position: relative;
}
.hero::before{
content:"";
position:absolute;
inset: 0;
background:
radial-gradient(900px 360px at 15% 20%, rgba(29,78,216,.14), transparent 60%),
radial-gradient(900px 420px at 90% 10%, rgba(29,78,216,.10), transparent 58%),
linear-gradient(180deg, rgba(18,24,38,.02), transparent 55%);
pointer-events: none;
}
.hero-grid{
position: relative;
display: grid;
grid-template-columns: 1.15fr .85fr;
gap: clamp(22px, 4vw, 44px);
align-items: start;
}
.hero-actions{
display: flex;
flex-wrap: wrap;
gap: 10px;
margin: var(--space-5) 0 var(--space-6);
}
.meta{
display: grid;
grid-template-columns: repeat(3, minmax(0,1fr));
gap: 12px;
padding-top: var(--space-4);
}
.meta > div{
padding: 14px 14px;
border-radius: var(--r-md);
border: 1px solid var(--line-2);
background: rgba(255,255,255,.70);
box-shadow: 0 1px 0 rgba(18,24,38,.05);
}
.meta strong{
display: inline-block;
margin-bottom: 4px;
}

.hero-visual{
border-radius: var(--r-lg);
background: rgba(255,255,255,.78);
border: 1px solid var(--line-2);
box-shadow: var(--shadow-md);
padding: var(--space-5);
position: sticky;
top: 88px;
}
.viz-title{
font-weight: 800;
color: var(--ink);
margin: 0 0 6px;
letter-spacing: -0.01em;
}
.viz{
border-radius: 14px;
overflow: hidden;
border: 1px solid rgba(18,24,38,.10);
background: #fff;
box-shadow: 0 1px 0 rgba(18,24,38,.05), 0 22px 60px rgba(18,24,38,.10);
transform: translateY(0);
transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease);
}
.hero-visual:hover .viz{
transform: translateY(-2px);
box-shadow: 0 1px 0 rgba(18,24,38,.06), 0 32px 80px rgba(18,24,38,.14);
}

@media (max-width: 980px){
.hero-grid{ grid-template-columns: 1fr; }
.meta{ grid-template-columns: 1fr; }
.hero-visual{ position: static; top: auto; }
}

/* ================= */
/* Content layout      */
/* ================= */
.columns{
display: grid;
grid-template-columns: 1.15fr .85fr;
gap: clamp(22px, 4vw, 44px);
align-items: start;
}
.editorial{
max-width: var(--measure);
}
.editorial > p{ max-width: var(--measure); }
.editorial ul{
margin: 0 0 1.1em;
padding-left: 1.1em;
color: var(--muted);
}
.editorial li{
padding: .2em 0;
}
.editorial li::marker{ color: rgba(29,78,216,.45); }

.aside{
border-radius: var(--r-lg);
border: 1px solid var(--line-2);
background: rgba(255,255,255,.72);
box-shadow: var(--shadow-sm);
padding: var(--space-5);
}
.aside p{ color: var(--muted); }

.note{
border-radius: var(--r-md);
border: 1px solid rgba(29,78,216,.18);
background: rgba(29,78,216,.06);
padding: 14px 14px;
box-shadow: 0 1px 0 rgba(18,24,38,.04);
}
.note p{ margin: 0 0 .55em; }
.note p:last-child{ margin-bottom: 0; }

.callout{
border-radius: calc(var(--r-lg) + 2px);
border: 1px solid rgba(18,24,38,.10);
background: linear-gradient(180deg, rgba(255,255,255,.86), rgba(255,255,255,.74));
box-shadow: var(--shadow-md);
padding: clamp(18px, 2.5vw, 28px);
}
.callout .sublead{ max-width: var(--measure); }

.proof{
display: grid;
grid-template-columns: repeat(2, minmax(0, 1fr));
gap: clamp(16px, 2vw, 24px);
}
.proof .block{
border-radius: var(--r-lg);
border: 1px solid var(--line-2);
background: rgba(255,255,255,.72);
box-shadow: var(--shadow-sm);
padding: var(--space-6);
}
.proof .block h3{ margin-bottom: .5em; }

.definition{
margin: 0;
display: grid;
gap: 12px;
}
.definition dt{
font-weight: 800;
color: var(--ink);
margin: 0;
}
.definition dd{
margin: 0;
color: var(--muted);
padding-left: 12px;
border-left: 2px solid rgba(29,78,216,.25);
}

@media (max-width: 980px){
.columns{ grid-template-columns: 1fr; }
.proof{ grid-template-columns: 1fr; }
}

/* ================= */
/* FAQ (details)      */
/* ================= */
.faq details{
border-radius: var(--r-md);
border: 1px solid var(--line-2);
background: rgba(255,255,255,.72);
box-shadow: 0 1px 0 rgba(18,24,38,.05);
padding: 14px 14px;
margin: 0 0 12px;
transition: box-shadow var(--dur-2) var(--ease), transform var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease);
}
.faq details[open]{
border-color: rgba(29,78,216,.20);
box-shadow: var(--shadow-sm);
}
.faq summary{
cursor: pointer;
list-style: none;
font-weight: 800;
color: var(--ink);
letter-spacing: -0.01em;
display: flex;
align-items: baseline;
justify-content: space-between;
gap: 10px;
}
.faq summary::-webkit-details-marker{ display:none; }
.faq summary::after{
content:"+";
font-weight: 800;
color: rgba(18,24,38,.55);
transition: transform var(--dur-2) var(--ease), color var(--dur-2) var(--ease);
}
.faq details[open] summary::after{
content:"–";
color: rgba(29,78,216,.85);
}
.faq details p{
margin: 10px 0 0;
color: var(--muted);
}

/* ================= */
/* Forms              */
/* ================= */
.form{
border-radius: var(--r-lg);
border: 1px solid var(--line-2);
background: rgba(255,255,255,.78);
box-shadow: var(--shadow-md);
padding: clamp(18px, 2.5vw, 28px);
}

.field{ margin-bottom: 14px; }
.field.inline{
display: grid;
grid-template-columns: repeat(2, minmax(0, 1fr));
gap: 12px;
}
@media (max-width: 680px){
.field.inline{ grid-template-columns: 1fr; }
}

label{
display: inline-block;
margin-bottom: 7px;
font-weight: 800;
font-size: 13px;
letter-spacing: .02em;
color: rgba(18,24,38,.86);
text-transform: uppercase;
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select{
width: 100%;
border-radius: 14px;
border: 1px solid rgba(18,24,38,.16);
background: rgba(255,255,255,.92);
padding: 12px 12px;
color: var(--ink);
box-shadow: inset 0 1px 0 rgba(18,24,38,.04);
transition:
border-color var(--dur-2) var(--ease),
box-shadow var(--dur-2) var(--ease),
transform var(--dur-2) var(--ease),
background-color var(--dur-2) var(--ease);
}

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

select{
appearance: none;
background-image:
linear-gradient(45deg, transparent 50%, rgba(18,24,38,.55) 50%),
linear-gradient(135deg, rgba(18,24,38,.55) 50%, transparent 50%);
background-position:
calc(100% - 18px) 54%,
calc(100% - 12px) 54%;
background-size: 6px 6px, 6px 6px;
background-repeat: no-repeat;
padding-right: 34px;
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible{
border-color: rgba(29,78,216,.55);
box-shadow:
0 0 0 4px rgba(29,78,216,.18),
inset 0 1px 0 rgba(18,24,38,.04);
}

input:invalid,
textarea:invalid{
border-color: rgba(220,38,38,.45);
}

.hint{
margin-top: 6px;
line-height: 1.35;
}

.form-actions{
display: flex;
flex-wrap: wrap;
gap: 10px;
margin-top: 12px;
}

.form .small{
margin-top: 12px;
}

/* ================= */
/* Footer             */
/* ================= */
.site-footer{
padding: var(--space-7) 0;
border-top: 1px solid var(--line-2);
background:
radial-gradient(900px 260px at 12% 30%, rgba(29,78,216,.08), transparent 55%),
linear-gradient(180deg, rgba(18,24,38,.02), transparent 70%);
}
.footer-grid{
display: grid;
grid-template-columns: 1.2fr 1fr 1fr;
gap: clamp(18px, 3vw, 32px);
align-items: start;
}
.footer-title{
font-family: var(--font-serif);
font-weight: 600;
letter-spacing: -0.01em;
color: var(--ink);
margin: 0 0 10px;
}
.footer-links a{
display: block;
padding: 6px 0;
color: rgba(18,24,38,.78);
}
.footer-links a:hover{
color: var(--ink);
}
@media (max-width: 980px){
.footer-grid{ grid-template-columns: 1fr; }
}

/* ================= */
/* Accessibility      */
/* ================= */
a:focus-visible,
summary:focus-visible{
outline: 3px solid rgba(29,78,216,.35);
outline-offset: 3px;
border-radius: 10px;
}

/* ================= */
/* Reduced motion     */
/* ================= */
@media (prefers-reduced-motion: reduce){
*, *::before, *::after{
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
scroll-behavior: auto !important;
}
.reveal{ transform: none !important; opacity: 1 !important; }
}