/* ===== CONVERGNY WEBSITE — MASTER STYLESHEET ===== */
:root {
  --olive: #6B6E3A;
  --olive-light: #8A8D5A;
  --olive-bg: #F4F5EE;
  --purple: #4A2D6B;
  --purple-light: #6B4D8B;
  --purple-dark: #2A1040;
  --grey-900: #1A1A2E;
  --grey-700: #3D3D5C;
  --grey-500: #6B6B7B;
  --grey-300: #B0B0BC;
  --grey-100: #F0F0F4;
  --white: #FFFFFF;
  --font-heading: 'DM Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--grey-700);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 { font-family: var(--font-heading); color: var(--grey-900); font-weight: 500; line-height: 1.25; }
h1 { font-size: 3rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; letter-spacing: -0.01em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }
p { margin-bottom: 1rem; }

a { color: var(--olive); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--purple); }

/* ===== LAYOUT ===== */
.container { max-width: 1140px; margin: 0 auto; padding: 0 2rem; }
.section { padding: 5rem 0; }
.section-sm { padding: 3rem 0; }

/* ===== NAVIGATION ===== */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.97); border-bottom: 1px solid rgba(107,110,58,0.12);
  backdrop-filter: blur(8px);
}
nav .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 80px;
}
nav .logo { display: flex; align-items: center; }
nav .logo img { height: 48px; }
nav ul { display: flex; gap: 2rem; align-items: center; margin: 0; }
nav ul { list-style: none; }
nav ul li a {
  font-size: 0.875rem; font-weight: 400; color: var(--grey-700);
  text-transform: uppercase; letter-spacing: 0.08em;
  padding: 0.5rem 0; border-bottom: 2px solid transparent;
  transition: all 0.2s;
}
nav ul li a:hover, nav ul li a.active {
  color: var(--olive); border-bottom-color: var(--olive);
}

/* Mobile hamburger */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--grey-700); margin: 5px 0; transition: 0.3s; }

/* ===== HERO ===== */
.hero {
  position: relative; min-height: 85vh; display: flex; align-items: center;
  background: linear-gradient(135deg, rgba(26,26,46,0.82), rgba(74,45,107,0.72)), url('images/hero_architecture.jpg') center/cover no-repeat;
  margin-top: 72px;
}
.hero-content { color: var(--white); max-width: 680px; }
.hero-content h1 { color: var(--white); font-size: 3.2rem; margin-bottom: 1.5rem; font-weight: 400; }
.hero-content p { font-size: 1.15rem; opacity: 0.9; margin-bottom: 2rem; line-height: 1.8; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 0.5rem 1.6rem; margin-bottom: 1rem; padding-top: 1.5rem; }
.hero-tags span { font-size: 0.8rem; text-transform: uppercase; font-weight: 600; letter-spacing: 0.12em; color: rgba(255,255,255,0.75); white-space: nowrap; }
.hero-cta {
  display: inline-block; padding: 0.9rem 2.2rem;
  background: var(--olive); color: var(--white);
  font-size: 0.875rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em;
  border: none; cursor: pointer; transition: background 0.2s;
}
.hero-cta:hover { background: var(--olive-light); color: var(--white); }

/* ===== PROPOSITIONS / SERVICE CARDS ===== */
.propositions-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 2rem;
}
.prop-card {
  padding: 2.5rem; background: var(--white); border: 1px solid var(--grey-100);
  transition: all 0.25s; position: relative;
}
.prop-card:hover { border-color: var(--olive); box-shadow: 0 8px 32px rgba(107,110,58,0.08); transform: translateY(-2px); }
.prop-card.anchor { border-left: 3px solid var(--olive); }
.prop-card.complementary { border-left: 3px solid var(--grey-300); }
.prop-num {
  font-size: 2.5rem; font-weight: 300; color: var(--olive); opacity: 0.35;
  font-family: var(--font-heading); margin-bottom: 0.75rem; line-height: 1;
}
.prop-card h3 { margin-bottom: 0.75rem; font-size: 1.15rem; }
.prop-card p { font-size: 0.9rem; color: var(--grey-500); margin-bottom: 1rem; }
.prop-card .learn-more {
  font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--olive); font-weight: 500;
}
.prop-label {
  font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--grey-300); margin-bottom: 0.5rem;
}

/* ===== APPROACH SECTION ===== */
.approach-phases {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem;
  margin-top: 2.5rem;
}
.phase-card {
  padding: 2rem; background: var(--olive-bg); border-top: 3px solid var(--olive);
}
.phase-card h4 { margin-bottom: 0.75rem; }
.phase-card p { font-size: 0.9rem; }
.phase-num {
  font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--olive); font-weight: 500; margin-bottom: 0.5rem;
}

/* ===== LEADERSHIP TEASER ===== */
.leadership-teaser {
  display: grid; grid-template-columns: 280px 1fr; gap: 3rem; align-items: center;
}
.leadership-photo {
  width: 280px; height: 280px; object-fit: cover; filter: grayscale(15%);
}
.leadership-info h3 { margin-bottom: 0.5rem; }
.leadership-info .title { font-size: 0.9rem; color: var(--olive); margin-bottom: 1rem; font-weight: 500; }
.leadership-info p { font-size: 0.95rem; }
.credentials-row {
  display: flex; flex-wrap: wrap; gap: 1.5rem; margin-top: 1.5rem;
  padding-top: 1.5rem; border-top: 1px solid var(--grey-100);
}
.credential-item { font-size: 0.8rem; color: var(--grey-500); }
.credential-item strong { color: var(--grey-900); display: block; font-size: 0.85rem; }

/* ===== EXPERIENCE / CASE STUDIES ===== */
.case-study-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.case-study {
  padding: 2rem; border: 1px solid var(--grey-100); transition: all 0.2s;
}
.case-study:hover { border-color: var(--olive); }
.case-study .cs-type {
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--olive); font-weight: 500; margin-bottom: 0.5rem;
}
.case-study h4 { font-size: 1rem; margin-bottom: 0.5rem; }
.case-study p { font-size: 0.85rem; color: var(--grey-500); }
.case-study .cs-meta {
  font-size: 0.75rem; color: var(--grey-300); margin-top: 0.75rem;
  padding-top: 0.75rem; border-top: 1px solid var(--grey-100);
}

/* ===== SERVICE PAGE ===== */
.service-hero {
  padding: 8rem 0 4rem; background: var(--grey-900); color: var(--white); margin-top: 72px;
}
.service-hero .prop-num { color: var(--olive-light); font-size: 4rem; opacity: 0.5; }
.service-hero h1 { color: var(--white); font-size: 2.4rem; margin-bottom: 1rem; }
.service-hero p { opacity: 0.8; max-width: 600px; }

.what-we-do-list { list-style: none; }
.what-we-do-list li {
  padding: 1rem 0; border-bottom: 1px solid var(--grey-100);
  font-size: 0.95rem; padding-left: 1.5rem; position: relative;
}
.what-we-do-list li::before {
  content: ''; position: absolute; left: 0; top: 1.35rem;
  width: 6px; height: 6px; background: var(--olive); border-radius: 50%;
}

.credential-card {
  padding: 1.5rem; background: var(--olive-bg); margin-bottom: 1rem;
}
.credential-card h4 { font-size: 0.95rem; margin-bottom: 0.5rem; }
.credential-card p { font-size: 0.85rem; margin-bottom: 0; }

/* ===== CONTACT ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.contact-item h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--olive); margin-bottom: 0.5rem; }
.contact-item p { font-size: 1rem; }
.contact-item a { color: var(--grey-900); font-weight: 500; }
.locations {
  display: flex; gap: 2rem; margin-top: 2rem; padding-top: 2rem;
  border-top: 1px solid var(--grey-100);
}
.location { text-align: center; }
.location .dot { width: 8px; height: 8px; background: var(--olive); border-radius: 50%; margin: 0 auto 0.5rem; }
.location span { font-size: 0.85rem; color: var(--grey-500); }

/* ===== FOOTER ===== */
footer {
  padding: 3rem 0; background: var(--grey-900); color: rgba(255,255,255,0.5);
  font-size: 0.8rem;
}
footer .container { display: flex; justify-content: space-between; align-items: center; }
footer a { color: rgba(255,255,255,0.7); }
footer a:hover { color: var(--white); }

/* ===== UTILITY ===== */
.text-olive { color: var(--olive); }
.text-purple { color: var(--purple); }
.bg-light { background: var(--grey-100); }
.bg-olive-light { background: var(--olive-bg); }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }
.text-center { text-align: center; }
.divider { width: 48px; height: 2px; background: var(--olive); margin: 1.5rem 0; }
.section-intro { max-width: 640px; color: var(--grey-500); font-size: 1.05rem; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  .hero { min-height: 70vh; }
  .hero-content h1 { font-size: 2.2rem; }
  .propositions-grid { grid-template-columns: 1fr; }
  .approach-phases { grid-template-columns: 1fr; }
  .leadership-teaser { grid-template-columns: 1fr; text-align: center; }
  .leadership-photo { margin: 0 auto; }
  .case-study-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-tags span { font-size: 0.72rem; letter-spacing: 0.1em; }
  nav ul { display: none; }
  .nav-toggle { display: block; }
  nav ul.open { display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: var(--white); padding: 1rem 2rem; border-bottom: 1px solid var(--grey-100); }
}