/* ===========================
   InfraStatera — style.css
   =========================== */

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --red:        #FF3008;
  --red-dark:   #CC2005;
  --red-light:  #FFF0ED;

  --text-primary:   #191820;
  --text-secondary: #555555;
  --text-muted:     #999999;

  --bg-primary:   #ffffff;
  --bg-secondary: #F7F7F7;
  --icon-bg:      #E8F2F8;
  --border:       rgba(0,0,0,0.08);

  --radius-pill: 50px;
  --radius-md:   10px;
  --radius-lg:   18px;

  --max-w: 1160px;
  --px: clamp(1.25rem, 6vw, 4rem);
}

html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--bg-primary);
}

h1, h2, h3 { font-weight: 800; line-height: 1.2; }

/* ---------- Navbar ---------- */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--px);
  height: 64px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}

.nav-logo-img {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

.nav-logo-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.nav-logo-text span { color: var(--red); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 2px;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0 8px;
}

.lang-btn {
  background: none;
  border: none;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  padding: 5px 7px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
  line-height: 1;
}

.lang-btn.active {
  color: var(--red);
  background: var(--red-light);
}

.lang-btn:hover:not(.active) {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.lang-sep {
  font-size: 12px;
  color: var(--border);
  user-select: none;
}

.nav-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 7px 10px;
  border-radius: var(--radius-md);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.nav-link:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* ---------- Buttons ---------- */
.btn-primary {
  display: inline-block;
  background: var(--red);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  padding: 10px 24px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: opacity 0.15s;
  white-space: nowrap;
}

.btn-primary:hover { opacity: 0.88; }

.btn-lg {
  font-size: 17px;
  padding: 15px 40px;
}

/* ---------- Divider ---------- */
.divider {
  border: none;
  border-top: 1px solid var(--border);
}

/* ---------- Shared section wrapper ---------- */
.section {
  padding: clamp(3rem, 7vw, 6rem) var(--px);
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-label {
  display: block;
  font-size: 11px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--red);
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.section-title {
  font-size: clamp(26px, 3.5vw, 42px);
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: clamp(14px, 1.8vw, 16px);
  color: var(--text-secondary);
  margin-bottom: 3rem;
  max-width: 520px;
  line-height: 1.7;
}

/* ============================================================
   1. HERO
   ============================================================ */
.hero {
  min-height: 88vh;
  display: flex;
  align-items: flex-start;
  padding: clamp(3rem, 6vw, 5rem) var(--px) clamp(3rem, 6vw, 5rem);
  background:
    linear-gradient(135deg, rgba(10,8,16,0.78) 0%, rgba(20,10,8,0.72) 100%),
    url('../assets/hero.jpg') center/cover no-repeat;
  color: #fff;
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}

.hero .tagline {
  display: block;
  font-size: 11px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--red);
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(36px, 6.5vw, 76px);
  color: #fff;
  max-width: 820px;
  margin-bottom: 1.5rem;
  line-height: 1.08;
}

.hero-sub {
  font-size: clamp(15px, 2vw, 19px);
  color: rgba(255,255,255,0.68);
  max-width: 540px;
  margin-bottom: 2.75rem;
  font-weight: 400;
  line-height: 1.7;
}

/* ============================================================
   2. PROBLEM / SOLUTION
   ============================================================ */
.problem-solution {
  background: var(--bg-secondary);
  padding: clamp(3rem, 7vw, 6rem) var(--px);
}

.ps-container {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.ps-problems .section-desc { margin-bottom: 0; }

.pain-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
}

.pain-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.pain-icon {
  font-size: 22px;
  color: var(--red);
  flex-shrink: 0;
  margin-top: 2px;
}

.pain-item strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.pain-item span {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
}

.solution-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: clamp(1.75rem, 4vw, 2.75rem);
  border: 1px solid var(--border);
  box-shadow: 0 4px 32px rgba(0,0,0,0.05);
}

.solution-label {
  display: block;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--red);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.solution-title {
  font-size: clamp(19px, 2.5vw, 27px);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1.75rem;
  line-height: 1.25;
}

.solution-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.solution-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
}

.solution-check {
  color: var(--red);
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ============================================================
   3. SERVICES
   ============================================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

.service-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1rem;
}

.service-icon-wrap {
  width: 96px;
  height: 96px;
  background: var(--icon-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  flex-shrink: 0;
}

.service-icon {
  font-size: 34px;
  color: var(--red);
}

.service-num {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--red);
  background: var(--red-light);
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 0.75rem;
}

.service-card .service-title {
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.service-card .service-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1rem;
  max-width: 230px;
}

.service-link {
  color: var(--red);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: opacity 0.15s;
}

.service-link:hover { opacity: 0.72; }

/* ============================================================
   4. CAS D'USAGE
   ============================================================ */
.cas-usage {
  background: var(--bg-secondary);
}

.cas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.cas-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: clamp(1.75rem, 4vw, 2.75rem);
  border-top: 4px solid var(--red);
  box-shadow: 0 4px 32px rgba(0,0,0,0.05);
}

.cas-stat {
  font-size: clamp(52px, 9vw, 88px);
  font-weight: 800;
  color: var(--red);
  line-height: 1;
  margin-bottom: 0.75rem;
  letter-spacing: -2px;
}

.cas-title {
  font-size: clamp(18px, 2.5vw, 24px);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.cas-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.cas-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cas-tag {
  font-size: 12px;
  font-weight: 700;
  background: var(--red-light);
  color: var(--red);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
}

/* ============================================================
   5. TRUST BAROMETER
   ============================================================ */
.trust {
  padding: clamp(3rem, 7vw, 6rem) var(--px);
  background: var(--bg-primary);
}

.trust-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.partners-carousel {
  overflow: hidden;
  margin: 2.5rem 0 3rem;
  -webkit-mask: linear-gradient(to right, transparent 0%, black 12%, black 88%, transparent 100%);
  mask:         linear-gradient(to right, transparent 0%, black 12%, black 88%, transparent 100%);
}

.partners-track {
  display: flex;
  align-items: center;
  gap: 3.5rem;
  width: max-content;
  animation: scroll-partners 22s linear infinite;
}

.partners-track:hover {
  animation-play-state: paused;
}

@keyframes scroll-partners {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.partner {
  font-size: clamp(18px, 2.5vw, 26px);
  font-weight: 800;
  color: #CCCCCC;
  letter-spacing: -0.3px;
  white-space: nowrap;
  user-select: none;
  transition: color 0.2s;
  padding: 0.5rem 1.5rem;
  border: 1.5px solid #E8E8E8;
  border-radius: 8px;
}

.partner:hover { color: var(--text-primary); border-color: #CCCCCC; }

.certs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.cert-icon {
  font-size: 22px;
  color: var(--red);
}

/* ============================================================
   6. MÉTHODOLOGIE
   ============================================================ */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  position: relative;
}

/* Connecting line across the top bubbles */
.steps::before {
  content: '';
  position: absolute;
  top: 23px;
  left: calc(12.5% + 4px);
  right: calc(12.5% + 4px);
  height: 2px;
  background: var(--red);
  opacity: 0.2;
}

.step { text-align: center; }

.step-bubble {
  width: 48px;
  height: 48px;
  background: var(--red);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 1.5rem;
  position: relative;
  z-index: 1;
}

.step-icon {
  font-size: 30px;
  color: var(--red);
  display: block;
  margin-bottom: 0.75rem;
}

.step-title {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.step-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: clamp(1.5rem, 4vw, 2.5rem) var(--px);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.footer-logo {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.footer-logo span { color: var(--red); }

.footer-slogan {
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 960px) {
  .ps-container { grid-template-columns: 1fr; gap: 2.5rem; }
  .steps {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
  .steps::before { display: none; }
}

@media (max-width: 1024px) {
  .nav-link { font-size: 12px; padding: 6px 7px; }
}

@media (max-width: 768px) {
  .services-grid { grid-template-columns: 1fr 1fr; }
  .cas-grid      { grid-template-columns: 1fr; }
  .footer        { flex-direction: column; align-items: flex-start; }
  .nav-link      { display: none; }
}

@media (max-width: 520px) {
  .services-grid { grid-template-columns: 1fr; }
  .steps         { grid-template-columns: 1fr; }
  .btn-lg        { width: 100%; text-align: center; }
}