/* ===================================================
   YIYAME - Design system
   Palette ancree sur le logo (bleu -> vert, forme fluide)
   Typo : Space Grotesk (titres) + Public Sans (texte courant)
   =================================================== */

:root {
  --ink: #0e1a17;
  --ink-soft: #3c4a46;
  --slate: #5c6b66;
  --paper: #f6f8f7;
  --paper-raised: #ffffff;
  --line: #dce3e0;
  --blue: #2e6fe0;
  --green: #1fae6b;
  --gradient: linear-gradient(135deg, var(--blue), var(--green));
  --radius-sm: 6px;
  --radius-md: 14px;
  --max-w: 1180px;
  --pad: clamp(20px, 5vw, 64px);
  --ease-out: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Public Sans', -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', sans-serif;
  color: var(--ink);
  line-height: 1.15;
  margin: 0;
  letter-spacing: -0.01em;
}

p { margin: 0; color: var(--ink-soft); max-width: 62ch; }

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* ---------- Header ---------- */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 248, 247, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 30px; width: auto; }

nav.main-nav {
  display: flex;
  gap: 32px;
  align-items: center;
}

nav.main-nav a {
  font-size: 15px;
  color: var(--ink-soft);
  transition: color .2s ease, transform .2s var(--ease-out);
}
nav.main-nav a:hover { color: var(--ink); transform: translateY(-2px); }
nav.main-nav a.current { color: var(--ink); font-weight: 600; }

.mobile-nav { display: none; }

.header-actions { display: flex; align-items: center; gap: 18px; }

.lang-toggle {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 100px;
  overflow: hidden;
  font-size: 13px;
  font-family: 'Space Grotesk', sans-serif;
}
.lang-toggle button {
  border: 0;
  background: transparent;
  padding: 6px 13px;
  cursor: pointer;
  color: var(--slate);
  font-family: inherit;
  font-size: inherit;
  transition: background .2s ease, color .2s ease, transform .2s var(--ease-out);
}
.lang-toggle button:hover { transform: translateY(-1px); }
.lang-toggle button.active {
  background: var(--ink);
  color: var(--paper);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .25s var(--ease-out), background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(14, 26, 23, .14); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-2px); }
.btn-sm { padding: 9px 16px; font-size: 14px; }
.btn-paper { background: var(--paper); color: var(--ink); }

.logo-primary { height: 34px; object-fit: contain; object-position: left; }
.logo-footer { height: 28px; object-fit: contain; object-position: left; }
.content-measure { max-width: 34ch; }
.spotlight-subtitle { margin: 14px 0 20px; font-size: 18px; }
.project-eyebrow { color: #c7d6d1; }
.tags-compact { margin: 20px 0; }
.section-centered { align-items: center; }
.contact-intro { margin-top: 16px; font-size: 16.5px; }
.contact-heading { font-family: 'Space Grotesk', sans-serif; font-size: 14px; color: var(--slate); margin-bottom: 14px; }
.contact-link { display: block; margin-bottom: 8px; }
.contact-support { display: block; color: var(--slate); font-size: 14.5px; }
.expertise-row-detail { flex-direction: column; align-items: flex-start; gap: 8px; }
.project-upcoming-narrow { max-width: 520px; }

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 88px;
  position: relative;
  overflow: hidden;
}
.hero .wrap { position: relative; z-index: 1; }
.hero-content { max-width: 680px; }
.hero-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .72fr); gap: clamp(36px, 7vw, 92px); align-items: center; }
.hero-visual { display: grid; place-items: center; min-height: 360px; perspective: 900px; }
.hero-placeholder {
  position: relative;
  width: min(100%, 480px);
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  border: 1px solid rgba(46, 111, 224, .22);
  border-radius: 30px;
  background: linear-gradient(145deg, rgba(255,255,255,.98), rgba(226,238,255,.82));
  box-shadow: 0 28px 70px rgba(46, 111, 224, .16), inset 0 0 0 14px rgba(255,255,255,.38);
  animation: placeholder-float 7s ease-in-out infinite;
  transform-style: preserve-3d;
}
.hero-placeholder::before, .hero-placeholder::after { content: ''; position: absolute; border-radius: 50%; pointer-events: none; }
.hero-placeholder::before { width: 58%; height: 58%; background: linear-gradient(135deg, rgba(46,111,224,.9), rgba(31,174,107,.72)); filter: blur(1px); transform: translate3d(-12px, 8px, 24px); opacity: .9; }
.hero-placeholder::after { width: 72%; height: 72%; border: 1px solid rgba(46,111,224,.24); transform: translate3d(22px, -20px, 42px); }
.placeholder-label { position: relative; z-index: 2; padding: 10px 16px; border: 1px solid rgba(14,26,23,.12); border-radius: 100px; background: rgba(255,255,255,.78); color: var(--ink-soft); font: 600 13px 'Space Grotesk', sans-serif; letter-spacing: .02em; box-shadow: 0 8px 18px rgba(14,26,23,.08); }
.hero-badge { position: absolute; z-index: 3; padding: 9px 13px; border: 1px solid rgba(46,111,224,.16); border-radius: 100px; background: rgba(255,255,255,.88); color: var(--ink-soft); font: 600 12px 'Space Grotesk', sans-serif; box-shadow: 0 12px 24px rgba(46,111,224,.12); animation: badge-drift 5s ease-in-out infinite; }
.hero-badge:nth-child(2) { top: 12%; right: -4%; animation-delay: -.8s; }
.hero-badge:nth-child(3) { bottom: 15%; left: -8%; animation-delay: -1.8s; }
.hero-badge:nth-child(4) { bottom: 4%; right: 12%; animation-delay: -2.7s; }
.hero-label {
  font-size: 15px;
  color: var(--slate);
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(38px, 6vw, 68px);
  max-width: 16ch;
  margin-bottom: 26px;
}
.hero p.lead {
  font-size: 19px;
  max-width: 52ch;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-wave {
  position: absolute;
  right: -120px;
  top: -80px;
  width: 520px;
  opacity: 0.35;
  z-index: -1;
  pointer-events: none;
}

/* ---------- Generic section ---------- */
section { padding: 88px 0; }
.section-border-top { border-top: 1px solid var(--line); }
section:nth-of-type(odd) { background: linear-gradient(180deg, rgba(255,255,255,.42), rgba(231,241,255,.3)); }
section:nth-of-type(even) { background: var(--paper); }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: 52px;
  flex-wrap: wrap;
}
.section-head h2 {
  font-size: clamp(28px, 3.6vw, 40px);
  max-width: 20ch;
}
.eyebrow {
  font-size: 14px;
  color: var(--slate);
  margin-bottom: 14px;
  display: inline-block;
}

/* ---------- Mission pillars ---------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 48px;
}
.pillar h3 {
  font-size: 20px;
  margin-bottom: 10px;
}
.pillar p { font-size: 15.5px; }

/* ---------- SafeDeal spotlight ---------- */
.spotlight {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius-md);
  padding: clamp(32px, 5vw, 64px);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  transition: transform .45s var(--ease-out), box-shadow .45s ease;
  position: relative;
  overflow: hidden;
}
.project-showcase::before { content: ''; position: absolute; inset: 0; background-image: linear-gradient(90deg, rgba(14,26,23,.97) 0%, rgba(14,26,23,.88) 48%, rgba(14,26,23,.5) 100%), var(--project-background); background-position: center; background-size: cover; opacity: .22; filter: saturate(.7) blur(2px); transform: scale(1.04); transition: opacity .45s ease, transform .8s var(--ease-out); pointer-events: none; }
.project-showcase:hover::before { opacity: .34; transform: scale(1.08); }
.project-showcase > * { position: relative; z-index: 1; }
.spotlight:hover { transform: translateY(-5px); box-shadow: 0 20px 44px rgba(14,26,23,.16); }
.spotlight p, .spotlight .eyebrow { color: #c7d6d1; }
.spotlight h3 { color: var(--paper); font-size: clamp(30px, 4vw, 44px); }
.spotlight-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 22px 0 28px;
}
.tag {
  border: 1px solid rgba(246,248,247,0.25);
  color: #c7d6d1;
  font-size: 13px;
  padding: 5px 12px;
  border-radius: 100px;
}
.spotlight-visual {
  background: var(--paper-raised);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.spotlight-visual img { max-height: 260px; }
.spotlight-visual { transition: transform .45s var(--ease-out); }
.spotlight:hover .spotlight-visual { transform: translateY(-5px) rotate(1deg); }
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #c7d6d1;
  margin-bottom: 18px;
}
.status-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--green);
}

/* ---------- Approach steps (real sequence -> numbering ok) ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: 48px;
}
.step {
  background: var(--paper-raised);
  padding: 32px 26px;
  transition: background .3s ease, transform .3s var(--ease-out), box-shadow .3s ease;
}
.step:hover { background: #f7fbff; transform: translateY(-5px); box-shadow: 0 12px 24px rgba(46,111,224,.1); position: relative; z-index: 1; }
.step .num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14px;
  color: var(--green);
  margin-bottom: 18px;
  display: block;
}
.step h3 { font-size: 18px; margin-bottom: 10px; }
.step p { font-size: 14.5px; }

/* ---------- Expertise list ---------- */
.expertise-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: 40px;
  border-top: 1px solid var(--line);
}
.expertise-row {
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  padding-right: 24px;
}
.expertise-row:nth-child(odd) { padding-right: 40px; }
.expertise-row h3 { font-size: 18px; font-weight: 600; }
.expertise-row p { font-size: 14.5px; margin: 0; }

/* ---------- Projects ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
  margin-top: 48px;
}
.project-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 36px;
  background: var(--paper-raised);
  transition: transform .35s var(--ease-out), box-shadow .35s ease, border-color .35s ease;
}
.project-card:hover { transform: translateY(-7px); box-shadow: 0 18px 34px rgba(46,111,224,.13); border-color: rgba(46,111,224,.32); }
.project-card.flagship {
  background: var(--ink);
  color: var(--paper);
  border: none;
}
.project-card.flagship:hover { box-shadow: 0 20px 40px rgba(14,26,23,.22); }
.project-card.flagship p { color: #c7d6d1; }
.project-card h3 { font-size: 26px; margin: 14px 0 12px; }
.project-card.flagship h3 { color: var(--paper); }
.project-card.upcoming {
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-style: dashed;
}
.project-card.upcoming h3 { color: var(--slate); font-size: 20px; }
.project-card.upcoming p { color: var(--slate); }

/* ---------- Why + founder ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.split h2 { font-size: clamp(26px, 3.4vw, 36px); margin-bottom: 22px; max-width: 16ch; }
.split p { font-size: 16px; margin-bottom: 14px; }

.founder-card {
  border-top: 1px solid var(--line);
  padding-top: 28px;
  margin-top: 28px;
}
.founder-name { font-family: 'Space Grotesk', sans-serif; font-size: 19px; margin-bottom: 4px; }
.founder-role { font-size: 14px; color: var(--slate); margin-bottom: 10px; }
.founder-tags { font-size: 14px; color: var(--slate); }

/* ---------- Contact ---------- */
.contact-block {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
}
.contact-block h2 { font-size: clamp(26px, 3.6vw, 38px); margin-bottom: 18px; max-width: 14ch; }
.field { margin-bottom: 20px; }
.field label {
  display: block;
  font-size: 13px;
  color: var(--slate);
  margin-bottom: 7px;
  font-family: 'Space Grotesk', sans-serif;
}
.field input, .field textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--paper-raised);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: 'Public Sans', sans-serif;
  font-size: 15px;
  color: var(--ink);
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field textarea:focus {
  outline: 2px solid var(--blue);
  outline-offset: 1px;
}

/* ---------- Scroll reveal and project details ---------- */
[data-reveal] { opacity: 1; transform: translateY(24px); transition: opacity .7s ease, transform .7s var(--ease-out); }
[data-reveal].is-visible { opacity: 1 !important; transform: none !important; }
.reveal-stagger > [data-reveal]:nth-child(2) { transition-delay: .08s; }
.reveal-stagger > [data-reveal]:nth-child(3) { transition-delay: .16s; }
.reveal-stagger > [data-reveal]:nth-child(4) { transition-delay: .24s; }
.project-card.is-clickable { cursor: pointer; }
.project-card.is-clickable:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }
.project-card .card-action { margin-top: 24px; }
.project-modal[hidden] { display: none; }
.project-modal { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 24px; background: rgba(14,26,23,.46); backdrop-filter: blur(8px); animation: modal-fade .25s ease both; }
.project-dialog { position: relative; width: min(100%, 680px); max-height: min(720px, 90vh); overflow: auto; padding: clamp(28px, 5vw, 52px); border-radius: var(--radius-md); background: var(--paper-raised); box-shadow: 0 28px 80px rgba(14,26,23,.24); animation: modal-rise .4s var(--ease-out) both; }
.project-dialog h2 { margin-bottom: 16px; font-size: clamp(28px, 5vw, 44px); }
.project-dialog p { margin-bottom: 18px; }
.project-dialog .tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0; }
.project-dialog .tag { color: var(--ink-soft); border-color: var(--line); background: #f7fbff; }
.modal-close { position: absolute; top: 18px; right: 18px; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--ink); cursor: pointer; font-size: 24px; line-height: 1; transition: transform .2s var(--ease-out), background .2s ease; }
.modal-close:hover { transform: rotate(90deg); background: #edf5ff; }
body.modal-open { overflow: hidden; }

@keyframes placeholder-float { 0%, 100% { transform: translate3d(0, 0, 0) rotate(-2deg); } 50% { transform: translate3d(0, -12px, 0) rotate(2deg); } }
@keyframes badge-drift { 0%, 100% { transform: translateY(0) rotate(-1deg); } 50% { transform: translateY(-7px) rotate(1deg); } }
@keyframes modal-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes modal-rise { from { opacity: 0; transform: translateY(18px) scale(.98); } to { opacity: 1; transform: none; } }

/* ---------- Footer ---------- */
footer.site-footer {
  border-top: 1px solid var(--line);
  padding: 56px 0 32px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-top img { height: 26px; margin-bottom: 14px; }
.footer-top p { font-size: 14.5px; }
.footer-col h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14px;
  margin-bottom: 14px;
  color: var(--slate);
}
.footer-col a, .footer-col span {
  display: block;
  font-size: 14.5px;
  color: var(--ink-soft);
  margin-bottom: 9px;
}
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  font-size: 13.5px;
  color: var(--slate);
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Inner page hero (about/projects/expertise/contact) ---------- */
.page-hero { padding: 64px 0 48px; }
.page-hero .eyebrow { margin-bottom: 18px; }
.page-hero h1 { font-size: clamp(32px, 5vw, 52px); max-width: 18ch; }
.page-hero p.lead { font-size: 18px; max-width: 55ch; margin-top: 22px; }

.prose { max-width: 68ch; }
.prose p { font-size: 16.5px; margin-bottom: 18px; }
.prose h2 { font-size: 24px; margin: 40px 0 14px; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  nav.main-nav { display: none; }
  .pillars, .expertise-list, .split, .contact-block, .footer-top { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .spotlight { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .expertise-row:nth-child(odd) { padding-right: 0; }
  .hero-layout { grid-template-columns: 1fr; gap: 20px; }
  .hero-visual { min-height: 280px; }
  .hero-placeholder { width: min(68vw, 320px); }
  section { padding: 68px 0; }
}

@media (max-width: 520px) {
  .site-header .wrap { padding-top: 14px; padding-bottom: 14px; }
  .header-actions { gap: 8px; }
  .lang-toggle button { padding: 5px 9px; }
  .header-actions .btn { padding: 8px 11px; font-size: 12px; }
  .hero { padding: 64px 0 58px; }
  .hero h1 { font-size: clamp(34px, 12vw, 48px); }
  .hero p.lead { font-size: 17px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .steps { grid-template-columns: 1fr; }
  .project-card { padding: 28px; }
}

@media (max-width: 860px) {
  body { padding-bottom: 92px; }
  .mobile-nav { position: fixed; left: 12px; right: 12px; bottom: max(12px, env(safe-area-inset-bottom)); z-index: 80; display: flex; align-items: center; justify-content: space-around; gap: 4px; padding: 8px; border: 1px solid rgba(220,227,224,.9); border-radius: 20px; background: rgba(255,255,255,.9); box-shadow: 0 16px 38px rgba(14,26,23,.18); backdrop-filter: blur(16px); }
  .mobile-nav a, .mobile-nav button { min-width: 58px; display: grid; justify-items: center; gap: 2px; padding: 7px 8px; border: 0; border-radius: 13px; background: transparent; color: var(--slate); font: 600 11px 'Public Sans', sans-serif; cursor: pointer; transition: background .2s ease, color .2s ease, transform .2s var(--ease-out); }
  .mobile-nav a[aria-current="page"] { background: #edf5ff; color: var(--blue); }
  .mobile-nav a:hover, .mobile-nav button:hover, .mobile-nav button[aria-expanded="true"] { background: #edf5ff; color: var(--blue); transform: translateY(-2px); }
  .mobile-nav-icon { font: 20px/1 'Space Grotesk', sans-serif; }
  .mobile-submenu { position: absolute; right: 8px; bottom: calc(100% + 10px); display: grid; min-width: 160px; padding: 7px; border: 1px solid var(--line); border-radius: 15px; background: rgba(255,255,255,.96); box-shadow: 0 14px 32px rgba(14,26,23,.16); opacity: 0; visibility: hidden; transform: translateY(8px); transition: opacity .2s ease, transform .2s var(--ease-out), visibility .2s ease; }
  .mobile-submenu.is-open { opacity: 1; visibility: visible; transform: none; }
  .mobile-submenu a { display: block; min-width: 0; text-align: left; padding: 10px 12px; border-radius: 9px; font-size: 13px; }
  .mobile-submenu a:hover { background: #edf5ff; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: .01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}