/* ==========================================================================
   PILOTIS AGENCY — Design system
   Navy #081239 · Violet #7B6EE8 · Teal #16AAA5 · Blanc #FFFFFF
   Display: Fraunces (serif, chic, architectural ball terminals)
   Body: Inter
   Signature: repères d'angle "plan d'architecte" + grille bleu-nuit qui se
   résout en trait plein — clin d'œil aux fondations / à la structure.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,500;0,9..144,600;1,9..144,500&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --navy: #081239;
  --navy-soft: #101c4d;
  --violet: #7B6EE8;
  --teal: #16AAA5;
  --white: #FFFFFF;
  --paper: #F6F5FB;
  --ink: #0E1430;
  --slate: #5B6178;
  --line: #E4E2F2;
  --violet-tint: #EFEDFC;
  --teal-tint: #E7F6F5;

  --serif: 'Fraunces', Georgia, serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --radius: 14px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, .display {
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.12;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.2rem, 4.4vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.5rem); }
h3 { font-size: 1.25rem; font-weight: 600; }

p { margin: 0 0 1em; color: var(--slate); }
.lede { font-size: 1.2rem; color: var(--ink); }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--violet);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--violet);
}

/* ---------- corner marks (signature detail) ---------- */
.corner-mark {
  position: relative;
}
.corner-mark::before,
.corner-mark::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--teal);
  opacity: 0.9;
}
.corner-mark::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.corner-mark::after { bottom: -1px; right: -1px; border-left: none; border-top: none; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn-primary {
  background: var(--navy);
  color: var(--white);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(8,18,57,0.25); }
.btn-secondary {
  background: transparent;
  color: var(--navy);
  border-color: var(--navy);
}
.btn-secondary:hover { background: var(--navy); color: var(--white); }
.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.4);
}
.btn-ghost:hover { border-color: var(--white); }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: linear-gradient(180deg, var(--violet-tint) 0%, #EFEDFC 100%);
  backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--teal);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 116px;
}
.logo {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.35rem;
  color: var(--navy);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.logo span { color: var(--teal); }
.nav {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav a {
  text-decoration: none;
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--ink);
  position: relative;
}
.nav a.active { color: var(--violet); }
.nav-links { display: flex; gap: 28px; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; }

.nav a.btn-primary,
.nav a.btn-primary:visited {
  color: var(--white) !important;
}
.logo {
  display: inline-flex;
  align-items: center;
}
.logo-img-header { height: 92px; width: auto; display: block; }

@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    inset: 116px 0 0 0;
    background: var(--white);
    flex-direction: column;
    padding: 30px 28px;
    gap: 22px;
    transform: translateY(-110%);
    transition: transform 0.25s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: block; }
  .nav .btn-primary { display: none; }
}

/* ---------- hero ---------- */
.hero {
  background: var(--navy);
  color: var(--white);
  position: relative;
  overflow: hidden;
  padding: 90px 0 100px;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, black, transparent 85%);
}
.hero-content { position: relative; max-width: 700px; }
.hero h1 { color: var(--white); }
.hero .lede { color: rgba(255,255,255,0.78); max-width: 560px; }
.hero-actions { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.hero-foundation {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--violet));
}

.page-hero {
  background: var(--navy);
  color: var(--white);
  padding: 64px 0 56px;
  position: relative;
  overflow: hidden;
}
.page-hero .eyebrow { color: var(--teal); }
.page-hero .eyebrow::before { background: var(--teal); }
.page-hero h1 { color: var(--white); }
.page-hero p { color: rgba(255,255,255,0.75); max-width: 640px; }

/* ---------- sections ---------- */
section { padding: 84px 0; }
.section-tight { padding: 56px 0; }
.section-alt { background: var(--paper); }
.section-navy { background: var(--navy); color: var(--white); }
.section-navy p { color: rgba(255,255,255,0.72); }
.section-navy h2 { color: var(--white); }

.section-head { max-width: 680px; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- grids ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
}

/* ---------- cards ---------- */
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(8,18,57,0.08); }
.card .tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--violet);
  background: var(--violet-tint);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.card p { font-size: 0.95rem; }
.card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--navy);
  text-decoration: none;
  margin-top: 10px;
}
.card .card-link:hover { color: var(--violet); }

.offer-card { border-top: 3px solid var(--teal); }
.offer-card:nth-child(2) { border-top-color: var(--violet); }
.offer-card:nth-child(3) { border-top-color: var(--navy); }
.offer-card:nth-child(4) { border-top-color: var(--teal); }

/* ---------- problem list ---------- */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px 40px;
}
@media (max-width: 700px) { .problem-grid { grid-template-columns: 1fr; } }
.problem-item {
  display: flex;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.problem-item .mark {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border: 1.5px solid var(--violet);
  border-radius: 50%;
  margin-top: 2px;
}
.problem-item p { margin: 0; color: var(--ink); font-size: 0.98rem; }

/* ---------- image frame with corner marks ---------- */
.frame {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
}
.frame img { width: 100%; height: 100%; object-fit: cover; }
.frame-mark { position: relative; }
.frame-mark::before, .frame-mark::after {
  content: "";
  position: absolute;
  width: 22px; height: 22px;
  z-index: 2;
  pointer-events: none;
}
.frame-mark::before {
  top: 10px; left: 10px;
  border-top: 2px solid var(--white);
  border-left: 2px solid var(--white);
}
.frame-mark::after {
  bottom: 10px; right: 10px;
  border-bottom: 2px solid var(--white);
  border-right: 2px solid var(--white);
}

/* ---------- about split ---------- */
.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: center;
}
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.split.reverse .split-media { order: 2; }

/* ---------- quote ---------- */
.pull-quote {
  font-family: var(--serif);
  font-size: 1.5rem;
  color: var(--navy);
  border-left: 3px solid var(--teal);
  padding-left: 24px;
  margin: 30px 0;
}

/* ---------- steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.step {
  padding: 24px 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.step .num {
  font-family: var(--serif);
  font-size: 1.6rem;
  color: var(--teal);
  display: block;
  margin-bottom: 10px;
}

/* ---------- FAQ ---------- */
.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--ink);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--serif);
  font-size: 1.4rem;
  color: var(--violet);
  flex-shrink: 0;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p { margin-top: 12px; }

/* ---------- form ---------- */
.form-wrap {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 620px) { .form-row { grid-template-columns: 1fr; } }
.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--ink);
}
.field input, .field select, .field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--sans);
  font-size: 0.95rem;
  background: var(--paper);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--violet);
  outline-offset: 1px;
  background: var(--white);
}
.checkbox-row { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 22px; }
.checkbox-row input { width: 18px; height: 18px; margin-top: 3px; }
.checkbox-row label { font-size: 0.9rem; color: var(--slate); }
.form-note {
  font-size: 0.85rem;
  color: var(--slate);
  background: var(--teal-tint);
  border-radius: 8px;
  padding: 12px 16px;
  margin-top: 16px;
}

/* ---------- contact strip ---------- */
.contact-strip {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}
.contact-strip a {
  text-decoration: none;
  font-weight: 600;
  color: var(--white);
}

/* ---------- footer ---------- */
footer {
  background: var(--navy);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 40px;
}
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
footer .logo { color: var(--white); }
footer h4 {
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 16px;
}
footer ul { list-style: none; padding: 0; margin: 0; }
footer li { margin-bottom: 10px; }
footer a { text-decoration: none; font-size: 0.92rem; }
footer a:hover { color: var(--teal); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.82rem;
}

/* ---------- utility ---------- */
.mt-0 { margin-top: 0; }
.center { text-align: center; }
.badge-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.badge {
  font-size: 0.82rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--violet-tint);
  color: var(--violet);
}
[data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }