/* ============================================
   IMMOBILIER COMMERCES — Stylesheet
   Design: Premium / Corporate Transactionnel
   ============================================ */

/* ==============================
   Variables
============================== */
:root {
  --dark:         #0F1923;
  --dark-2:       #162030;
  --gold:         #B8975A;
  --gold-light:   #C9A96E;
  --gold-pale:    rgba(184, 151, 90, 0.08);
  --light:        #F7F6F3;
  --white:        #FFFFFF;
  --text:         #1A1A1A;
  --muted:        #6B7280;
  --border:       #E5E1DB;
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width:    1200px;
  --radius:       10px;
  --transition:   0.28s ease;
}

/* ==============================
   Reset & Base
============================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ==============================
   Typography
============================== */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.015em;
}
h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); }
h2 { font-size: clamp(1.9rem, 3.5vw, 3rem); }
h3 { font-size: clamp(1.35rem, 2.5vw, 1.9rem); }
h4 { font-size: 1.2rem; font-weight: 500; }

p { font-size: 1rem; line-height: 1.8; color: var(--muted); }
strong { color: var(--text); font-weight: 600; }

/* ==============================
   Layout Helpers
============================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.section       { padding: 96px 24px; }
.section-sm    { padding: 64px 24px; }
.section-light { background: var(--white); }
.section-muted { background: var(--light); }
.section-dark  { background: var(--dark); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* ==============================
   Label / Eyebrow
============================== */
.label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 20px;
}
.label::before {
  content: '';
  display: block;
  width: 28px;
  height: 1px;
  background: var(--gold);
  flex-shrink: 0;
}

/* ==============================
   Buttons
============================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 7px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  letter-spacing: 0.01em;
}
.btn-gold { background: var(--gold); color: var(--white); }
.btn-gold:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(184,151,90,0.3);
}
.btn-dark { background: var(--dark); color: var(--white); }
.btn-dark:hover {
  background: var(--dark-2);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(15,25,35,0.25);
}
.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.22);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.4);
}
.btn-outline {
  background: transparent;
  color: var(--dark);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  background: var(--dark);
  color: var(--white);
  border-color: var(--dark);
}
.btn-arrow::after  { content: '→'; transition: transform var(--transition); }
.btn-arrow:hover::after { transform: translateX(5px); }

/* ==============================
   Header & Navigation
============================== */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
#site-header.scrolled {
  box-shadow: 0 2px 24px rgba(0,0,0,0.07);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {
  width: 34px; height: 34px;
  background: var(--dark);
  border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
}
.brand-logo svg { width: 18px; height: 18px; }
.brand-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--dark);
  letter-spacing: 0.01em;
  line-height: 1.1;
}
.brand-sub {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gold);
  display: block;
  font-family: var(--font-body);
  font-weight: 600;
}

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  padding: 7px 13px;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--light); }
.nav-links .nav-cta {
  background: var(--dark);
  color: var(--white);
  padding: 9px 20px;
  margin-left: 8px;
  border-radius: 7px;
}
.nav-links .nav-cta:hover { background: var(--gold); color: var(--white); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--dark); border-radius: 2px;
  transition: all var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  background: var(--white);
  border-top: 1px solid var(--border);
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  font-size: 0.95rem; font-weight: 500;
  color: var(--text); padding: 15px 24px;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition), background var(--transition);
}
.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a:hover { color: var(--gold); background: var(--light); }

/* ==============================
   Hero (homepage)
============================== */
.hero {
  background: var(--dark);
  padding: 162px 24px 120px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: -120px; right: -120px;
  width: 560px; height: 560px; border-radius: 50%;
  border: 1px solid rgba(184,151,90,0.09);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute; bottom: -200px; left: -150px;
  width: 600px; height: 600px; border-radius: 50%;
  border: 1px solid rgba(184,151,90,0.06);
  pointer-events: none;
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative; z-index: 1;
}
.hero h1 {
  color: var(--white);
  max-width: 780px;
  margin-bottom: 28px;
  font-weight: 300;
  line-height: 1.08;
}
.hero h1 em { font-style: italic; color: var(--gold-light); }
.hero-sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.55);
  max-width: 540px;
  margin-bottom: 52px;
  line-height: 1.75;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ==============================
   Page Hero (inner pages)
============================== */
.page-hero {
  background: var(--dark);
  padding: 144px 24px 80px;
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; top: -80px; right: -100px;
  width: 450px; height: 450px; border-radius: 50%;
  border: 1px solid rgba(184,151,90,0.07);
}
.page-hero-inner {
  max-width: var(--max-width);
  margin: 0 auto; position: relative; z-index: 1;
}
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.8rem; color: rgba(255,255,255,0.35);
  margin-bottom: 28px;
}
.breadcrumb a { color: rgba(255,255,255,0.35); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb .sep { color: rgba(255,255,255,0.2); }
.page-hero h1 { color: var(--white); font-weight: 300; max-width: 680px; margin-bottom: 20px; }
.page-hero .page-hero-sub {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.5);
  max-width: 540px; line-height: 1.75;
}

/* ==============================
   Cards
============================== */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 40px 36px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.card:hover {
  border-color: var(--gold);
  box-shadow: 0 10px 48px rgba(0,0,0,0.07);
  transform: translateY(-5px);
}
.card-icon {
  width: 46px; height: 46px;
  background: var(--gold-pale);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 24px; color: var(--gold);
}
.card-icon svg { width: 22px; height: 22px; }
.card h3 { font-size: 1.4rem; color: var(--dark); margin-bottom: 12px; }
.card p { font-size: 0.935rem; line-height: 1.75; }
.card-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.85rem; font-weight: 600; color: var(--gold);
  margin-top: 24px; transition: gap var(--transition);
}
.card-link:hover { gap: 10px; }

/* ==============================
   Feature / Split blocks
============================== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
}
.feature-grid.reverse { direction: rtl; }
.feature-grid.reverse > * { direction: ltr; }

.feature-content h2 { color: var(--dark); margin-bottom: 20px; }
.feature-content p { margin-bottom: 28px; }

.feature-visual {
  background: var(--light);
  border-radius: 16px;
  padding: 64px 40px;
  text-align: center;
  position: relative; overflow: hidden;
}
.feature-visual::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--gold-pale), transparent);
  pointer-events: none;
}
.feature-big-number {
  font-family: var(--font-display);
  font-size: clamp(5rem, 10vw, 9rem);
  font-weight: 300;
  color: rgba(15,25,35,0.05);
  line-height: 1;
  user-select: none;
  position: relative; z-index: 1;
}
.feature-big-label {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--dark);
  margin-top: 8px;
  position: relative; z-index: 1;
}

/* ==============================
   Check list
============================== */
.check-list { display: flex; flex-direction: column; gap: 14px; }
.check-list li {
  display: flex; align-items: flex-start; gap: 12px;
  font-size: 0.935rem; color: var(--text); line-height: 1.6;
}
.check-list li::before {
  content: '';
  display: block; width: 20px; height: 20px; min-width: 20px;
  background: var(--gold-pale) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%23B8975A'%3E%3Cpath fill-rule='evenodd' d='M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z' clip-rule='evenodd'/%3E%3C/svg%3E") center/12px no-repeat;
  border-radius: 50%; margin-top: 1px;
}

/* ==============================
   Steps / Process
============================== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.steps-grid::before {
  content: '';
  position: absolute;
  top: 23px; left: 12.5%; right: 12.5%;
  height: 1px; background: var(--border); z-index: 0;
}
.step { text-align: center; padding: 0 12px; position: relative; z-index: 1; }
.step-num {
  width: 46px; height: 46px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 1.1rem;
  color: var(--dark); margin: 0 auto 22px;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.step:hover .step-num { background: var(--gold); border-color: var(--gold); color: var(--white); }
.step h4 { color: var(--dark); margin-bottom: 10px; font-size: 1.05rem; }
.step p { font-size: 0.875rem; line-height: 1.65; }

/* ==============================
   Highlight box
============================== */
.highlight-box {
  background: var(--gold-pale);
  border-left: 3px solid var(--gold);
  border-radius: 0 10px 10px 0;
  padding: 22px 26px; margin: 32px 0;
}
.highlight-box p {
  font-size: 0.975rem;
  color: var(--text); font-style: italic; line-height: 1.7;
}

/* ==============================
   Two-column content
============================== */
.two-col {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: start;
}

/* ==============================
   CTA Block
============================== */
.cta-block {
  background: var(--dark);
  border-radius: 16px;
  padding: 80px 64px;
  text-align: center;
  position: relative; overflow: hidden;
}
.cta-block::before {
  content: '';
  position: absolute; top: -180px; right: -180px;
  width: 500px; height: 500px; border-radius: 50%;
  border: 1px solid rgba(184,151,90,0.1);
  pointer-events: none;
}
.cta-block h2 { color: var(--white); margin-bottom: 16px; position: relative; z-index: 1; }
.cta-block p { color: rgba(255,255,255,0.55); margin-bottom: 40px; font-size: 1.05rem; position: relative; z-index: 1; }
.cta-block .btn, .cta-block .label { position: relative; z-index: 1; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ==============================
   Contact
============================== */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.6fr;
  gap: 80px; align-items: start;
  max-width: var(--max-width); margin: 0 auto;
  padding: 0 24px;
}
.contact-item {
  display: flex; align-items: flex-start; gap: 16px;
  margin-bottom: 28px;
}
.contact-item-icon {
  width: 40px; height: 40px; min-width: 40px;
  background: var(--gold-pale);
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  color: var(--gold);
}
.contact-item-icon svg { width: 18px; height: 18px; }
.contact-item-label {
  font-size: 0.75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--dark); display: block; margin-bottom: 3px;
}
.contact-item-value {
  font-size: 0.93rem; color: var(--muted);
  transition: color var(--transition);
}
a.contact-item-value:hover { color: var(--gold); }

/* Form */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 20px; }
label {
  display: block;
  font-size: 0.75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--dark); margin-bottom: 8px;
}
input, select, textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--font-body); font-size: 0.925rem;
  color: var(--text); background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(184,151,90,0.1);
}
input::placeholder, textarea::placeholder { color: #BCBAB6; }
textarea { resize: vertical; min-height: 130px; }
select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%236B7280'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 15px;
  padding-right: 42px;
  cursor: pointer;
}
.form-footer { display: flex; justify-content: flex-end; margin-top: 4px; }
.form-success {
  display: none;
  background: rgba(184,151,90,0.07);
  border: 1px solid var(--gold);
  border-radius: 10px;
  padding: 24px 28px; text-align: center; margin-top: 20px;
}
.form-success p { color: var(--dark); font-size: 0.935rem; }

/* ==============================
   Footer
============================== */
#site-footer { background: var(--dark); padding: 72px 24px 0; }
.footer-grid {
  max-width: var(--max-width); margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr;
  gap: 64px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.footer-brand-name {
  font-family: var(--font-display);
  font-size: 1.2rem; color: var(--white);
  display: block; margin-bottom: 14px;
}
.footer-brand p {
  font-size: 0.875rem; color: rgba(255,255,255,0.38);
  line-height: 1.75; max-width: 290px;
}
.footer-col h5 {
  font-family: var(--font-body);
  font-size: 0.7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: rgba(255,255,255,0.3);
  margin-bottom: 20px;
}
.footer-col a {
  display: block; font-size: 0.875rem;
  color: rgba(255,255,255,0.55);
  margin-bottom: 12px;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--gold); }
.footer-bottom {
  max-width: var(--max-width); margin: 0 auto;
  padding: 22px 0;
  display: flex; align-items: center; justify-content: space-between;
}
.footer-bottom p { font-size: 0.8rem; color: rgba(255,255,255,0.22); }

/* ==============================
   Animations
============================== */
.fade-in {
  opacity: 0; transform: translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* ==============================
   Responsive
============================== */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: 1fr; gap: 40px; }
  .feature-grid.reverse { direction: ltr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .steps-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .steps-grid::before { display: none; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.8rem; }
  .section { padding: 64px 20px; }
  .section-sm { padding: 48px 20px; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .hero { padding: 128px 20px 80px; }
  .page-hero { padding: 128px 20px 60px; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 1fr; gap: 36px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-block { padding: 52px 24px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { justify-content: center; }
  .cta-actions { flex-direction: column; align-items: center; }
  .contact-grid { padding: 0 20px; }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}