/* =========================================================================
   NextPartner × Ormail — Design System
   Moderne/startup : violet/bleu profond, typo système, zéro dépendance externe
   ========================================================================= */

/* --- Reset minimal ----------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; min-height: 100vh; line-height: 1.6; -webkit-font-smoothing: antialiased; }
img, svg, video { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; }

/* --- Design tokens ----------------------------------------------------- */
:root {
  /* Palette : violet/bleu startup moderne */
  --c-bg: #0a0a0f;
  --c-bg-soft: #11111a;
  --c-surface: #181826;
  --c-surface-hi: #1f1f30;
  --c-border: #2a2a3e;
  --c-text: #f5f5fa;
  --c-text-muted: #9a9ab0;
  --c-text-dim: #6a6a82;

  --c-primary: #7c5cff;        /* violet signature */
  --c-primary-hi: #9d83ff;
  --c-primary-lo: #5a3cd9;
  --c-accent: #00d4ff;          /* cyan accent */
  --c-success: #00e676;
  --c-warning: #ffb74d;
  --c-danger: #ff5252;

  /* Gradient signature */
  --grad-hero: linear-gradient(135deg, #7c5cff 0%, #00d4ff 100%);
  --grad-card: linear-gradient(145deg, rgba(124,92,255,0.08), rgba(0,212,255,0.04));

  /* Typo : Inter (police corporate pro — Linear, Vercel, Stripe) */
  --ff-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  --ff-mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Consolas, monospace;

  /* Tracking serré pro pour les titres courts (logo, nav) */
  --tracking-tight: -0.03em;
  --tracking-snug: -0.02em;
  --tracking-normal: 0;

  /* Échelle typo */
  --fs-xs: 0.8125rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.375rem;
  --fs-2xl: 1.875rem;
  --fs-3xl: 2.5rem;
  --fs-4xl: 3.5rem;

  /* Espacement (échelle 4) */
  --sp-1: 0.25rem; --sp-2: 0.5rem; --sp-3: 0.75rem;
  --sp-4: 1rem; --sp-5: 1.5rem; --sp-6: 2rem;
  --sp-7: 3rem; --sp-8: 4rem; --sp-9: 6rem;

  /* Radius */
  --r-sm: 6px; --r-md: 10px; --r-lg: 16px; --r-xl: 24px;

  /* Ombres */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 40px rgba(124,92,255,0.15);
  --shadow-glow: 0 0 40px rgba(124,92,255,0.25);

  /* Transitions */
  --t-fast: 150ms ease;
  --t-base: 250ms ease;

  /* Container */
  --container: 1200px;
  --container-narrow: 800px;
}

/* Base -------------------------------------------------------------- */
body {
  font-family: var(--ff-sans);
  font-size: var(--fs-base);
  font-feature-settings: "ss01", "cv11", "cv05";  /* Inter stylistic sets */
  color: var(--c-text);
  background: var(--c-bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(124,92,255,0.15), transparent),
    radial-gradient(ellipse 60% 50% at 80% 100%, rgba(0,212,255,0.08), transparent);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 { margin: 0 0 var(--sp-4); line-height: 1.2; font-weight: 700; letter-spacing: -0.02em; }
h1 { font-size: var(--fs-4xl); }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-2xl); }
h4 { font-size: var(--fs-xl); }
p { margin: 0 0 var(--sp-4); color: var(--c-text-muted); }

a { text-decoration: none; transition: color var(--t-fast); }
a:hover, a:focus-visible { color: var(--c-primary-hi); }

:focus-visible {
  outline: 2px solid var(--c-primary-hi);
  outline-offset: 3px;
  border-radius: 3px;
}

/* Skip-link a11y */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--sp-4);
  background: var(--c-primary);
  color: white;
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--r-md);
  z-index: 1000;
  font-weight: 600;
}
.skip-link:focus { top: var(--sp-4); }

/* --- Layout ------------------------------------------------------------ */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--sp-5); }
.container--narrow { max-width: var(--container-narrow); }
.section { padding: var(--sp-9) 0; }
.section--sm { padding: var(--sp-7) 0; }

/* --- Header ------------------------------------------------------------ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--sp-4) 0;
}
.brand {
  display: flex; align-items: center; gap: var(--sp-3);
  font-weight: 700; font-size: var(--fs-lg);
  letter-spacing: var(--tracking-tight);
  color: var(--c-text);
  text-decoration: none;
}
.brand__mark {
  width: 32px; height: 32px;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, #7c5cff 0%, #5a3cd9 100%);
  display: grid; place-items: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(124, 92, 255, 0.25);
}
.brand__mark svg {
  width: 20px; height: 20px;
}
.nav { display: flex; align-items: center; gap: var(--sp-6); }
.nav a { color: var(--c-text-muted); font-weight: 500; font-size: var(--fs-sm); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--c-text); }
.nav__lang { display: flex; gap: var(--sp-2); margin-left: var(--sp-3); padding-left: var(--sp-5); border-left: 1px solid var(--c-border); }
.nav__lang a { font-size: var(--fs-xs); padding: var(--sp-1) var(--sp-2); border-radius: var(--r-sm); font-weight: 600; }
.nav__lang a[aria-current="true"] { background: var(--c-surface); color: var(--c-primary-hi); }

@media (max-width: 768px) {
  .site-footer .container { grid-template-columns: 1fr; gap: var(--sp-4); }
  .site-footer__legal { flex-direction: column; gap: var(--sp-2); text-align: center; }
}

/* Mobile */
@media (max-width: 720px) {
  .nav a:not(.btn):not(.nav__lang a) { display: none; }
  .nav { gap: var(--sp-3); }
  .nav__lang { padding-left: var(--sp-3); }
  .hero { min-height: 85vh; padding: var(--sp-8) 0; }
  .hero h1 { font-size: 2.25rem; }
  .hero__cta { flex-direction: column; align-items: stretch; width: 100%; }
  .hero__cta .btn { width: 100%; justify-content: center; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: var(--sp-4); }
  .grid--3, .grid--2 { grid-template-columns: 1fr; }
  .container { padding: 0 var(--sp-4); }
  .section { padding: var(--sp-8) 0; }
  .section--sm { padding: var(--sp-6) 0; }
  .card { padding: var(--sp-5); }
  h2 { font-size: var(--fs-2xl); }
  h3 { font-size: var(--fs-xl); }
  .brand { font-size: var(--fs-base); }
  .brand__mark { width: 28px; height: 28px; }
}

@media (max-width: 480px) {
  .hero { min-height: 80vh; }
  .hero h1 { font-size: 1.875rem; }
  .stat__value { font-size: var(--fs-2xl); }
  .stats { gap: var(--sp-3); }
  .eyebrow { font-size: 0.7rem; }
}

@media (max-width: 360px) {
  .brand { gap: var(--sp-2); }
  .nav__lang { padding-left: var(--sp-2); }
}

/* --- Buttons ----------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--r-md);
  font-weight: 600; font-size: var(--fs-sm);
  border: 1px solid transparent;
  transition: all var(--t-base);
  white-space: nowrap;
}
.btn__arrow {
  transition: transform var(--t-base);
  flex-shrink: 0;
}
.btn:hover .btn__arrow {
  transform: translateX(3px);
}
.btn--primary {
  background: rgba(255, 255, 255, 0.95);
  color: #0a0a0f;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(0,0,0,0.15), 0 0 0 1px rgba(255,255,255,0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
}
.btn--primary:hover {
  background: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2), 0 0 0 1px rgba(255,255,255,0.3);
  color: #0a0a0f;
}
.btn--ghost { background: transparent; color: var(--c-text); border-color: var(--c-border); }
.btn--ghost:hover { background: var(--c-surface); border-color: var(--c-primary); color: var(--c-text); }
.btn--sm { padding: var(--sp-2) var(--sp-3); font-size: var(--fs-xs); }

/* --- Hero -------------------------------------------------------------- */
.hero { padding: var(--sp-9) 0 var(--sp-8); text-align: center; position: relative; }
.hero__badge {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4); border-radius: 999px;
  background: var(--c-surface); border: 1px solid var(--c-border);
  font-size: var(--fs-xs); font-weight: 600; color: var(--c-text-muted);
  margin-bottom: var(--sp-5);
}
.hero__badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--c-success); box-shadow: 0 0 8px var(--c-success); }
.hero h1 {
  font-size: clamp(2.25rem, 5vw + 1rem, var(--fs-4xl));
  background: linear-gradient(180deg, #fff 30%, #a8a8c5);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--sp-5);
}
.hero h1 em { font-style: normal; background: var(--grad-hero); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero p.lead { font-size: var(--fs-lg); max-width: 640px; margin: 0 auto var(--sp-6); color: var(--c-text-muted); }
.hero__cta { display: flex; gap: var(--sp-3); justify-content: center; flex-wrap: wrap; }

/* --- Cards / Grid ------------------------------------------------------ */
.grid { display: grid; gap: var(--sp-5); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: ''; position: absolute; inset: 0;
  background: var(--grad-card);
  opacity: 0; transition: opacity var(--t-base);
  pointer-events: none;
}
.card:hover { transform: translateY(-3px); border-color: var(--c-primary); }
.card:hover::before { opacity: 1; }
.card > * { position: relative; }
.card__icon {
  width: 48px; height: 48px; border-radius: var(--r-md);
  background: var(--grad-card); border: 1px solid var(--c-border);
  display: grid; place-items: center;
  font-size: 24px; margin-bottom: var(--sp-4);
  color: var(--c-primary-hi);
}
.card h3 { font-size: var(--fs-xl); margin-bottom: var(--sp-2); color: var(--c-text); }
.card p { margin: 0; font-size: var(--fs-sm); }

/* --- Features list (checkmarks) --------------------------------------- */
.feature-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--sp-3); }
.feature-list li { display: flex; gap: var(--sp-3); align-items: flex-start; color: var(--c-text-muted); font-size: var(--fs-sm); }
.feature-list li::before {
  content: '✓'; flex-shrink: 0;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--grad-hero);
  color: white; font-weight: 800;
  display: grid; place-items: center;
  font-size: 12px;
}

/* --- Sections (split) -------------------------------------------------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-7); align-items: center; }
@media (max-width: 880px) { .split { grid-template-columns: 1fr; } }
.split__visual {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  font-family: var(--ff-mono);
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  position: relative;
  overflow: hidden;
}
.split__visual::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 28px;
  background: var(--c-bg-soft);
  border-bottom: 1px solid var(--c-border);
}
.split__visual pre { margin: 28px 0 0; white-space: pre-wrap; word-wrap: break-word; }
.split__visual .dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; }
.split__visual .dot--r { background: #ff5f56; }
.split__visual .dot--y { background: #ffbd2e; }
.split__visual .dot--g { background: #27c93f; }
.split__visual .window { position: absolute; top: 8px; left: 12px; }

/* --- Stats / KPI ------------------------------------------------------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--sp-5); margin-top: var(--sp-6); }
.stat { text-align: center; }
.stat__value {
  font-size: var(--fs-3xl); font-weight: 800;
  background: var(--grad-hero); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.stat__label { font-size: var(--fs-sm); color: var(--c-text-muted); margin-top: var(--sp-2); }

/* --- Contact ----------------------------------------------------------- */
.contact-form { max-width: 560px; margin: 0 auto; }
.contact-form label { display: block; font-size: var(--fs-sm); font-weight: 600; margin-bottom: var(--sp-2); color: var(--c-text); }
.contact-form input, .contact-form textarea, .contact-form select {
  width: 100%; padding: var(--sp-3) var(--sp-4);
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--r-md); color: var(--c-text);
  transition: border-color var(--t-fast);
  margin-bottom: var(--sp-4);
  font-family: inherit;
}
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus {
  outline: none; border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(124,92,255,0.15);
}
.contact-form textarea { min-height: 140px; resize: vertical; }
.contact-form .btn { width: 100%; justify-content: center; padding: var(--sp-4); margin-top: var(--sp-2); }
.contact-info { display: grid; gap: var(--sp-3); margin-top: var(--sp-6); font-size: var(--fs-sm); color: var(--c-text-muted); }
.contact-info a { color: var(--c-primary-hi); }

/* --- Footer ------------------------------------------------------------ */
.site-footer {
  margin-top: var(--sp-9);
  padding: var(--sp-7) 0 var(--sp-5);
  border-top: 1px solid var(--c-border);
  background: var(--c-bg-soft);
}
.site-footer .container { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--sp-6); }
@media (max-width: 720px) { .site-footer .container { grid-template-columns: 1fr; } }
.site-footer h4 { font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: 0.1em; color: var(--c-text); margin-bottom: var(--sp-3); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: var(--sp-2); }
.site-footer li a { color: var(--c-text-muted); font-size: var(--fs-sm); }
.site-footer li a:hover { color: var(--c-text); }
.site-footer__legal {
  margin-top: var(--sp-6); padding-top: var(--sp-5);
  border-top: 1px solid var(--c-border);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--sp-3);
  font-size: var(--fs-xs); color: var(--c-text-dim);
}

/* --- Misc utility ------------------------------------------------------ */
.eyebrow {
  display: inline-block; font-size: var(--fs-xs); font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.15em;
  color: var(--c-primary-hi);
  margin-bottom: var(--sp-3);
}
.text-center { text-align: center; }
.mt-6 { margin-top: var(--sp-6); }
.mt-7 { margin-top: var(--sp-7); }

/* --- Print (économie d'encre si imprimé) ------------------------------- */
@media print {
  body { background: white; color: black; }
  .site-header, .site-footer, .btn, .skip-link { display: none; }
  a::after { content: " (" attr(href) ")"; font-size: 0.8em; }
}

/* --- Reduced motion ---------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}