/* =========================================================
   PerfectLab - Feuille de style principale
   Design system : palette bleu nuit + accent ambre
   ========================================================= */

:root {
  --color-primary: #1F4E79;
  --color-primary-dark: #163A5C;
  --color-primary-light: #2E75B6;
  --color-accent: #F2A623;
  --color-accent-dark: #C8830F;
  --color-bg: #F8FAFC;
  --color-bg-alt: #FFFFFF;
  --color-bg-dark: #0F2942;
  --color-text: #1A202C;
  --color-text-muted: #5A6B7C;
  --color-text-light: #FFFFFF;
  --color-border: #E2E8F0;
  --color-success: #2F855A;

  --shadow-sm: 0 1px 3px rgba(15, 41, 66, 0.08);
  --shadow-md: 0 4px 12px rgba(15, 41, 66, 0.10);
  --shadow-lg: 0 12px 32px rgba(15, 41, 66, 0.14);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-accent);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* =========================================================
   NAVIGATION
   ========================================================= */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.5px;
}

.logo-text { color: var(--color-primary); }
.logo-accent { color: var(--color-accent); }

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--color-text);
  font-weight: 500;
  position: relative;
  padding: 0.4rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a.active {
  color: var(--color-primary);
}

.nav-cta {
  background: var(--color-accent);
  color: white !important;
  padding: 0.6rem 1.4rem !important;
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.nav-cta::after { display: none !important; }

.nav-cta:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: all var(--transition);
}

.menu-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(7px, -7px); }

/* =========================================================
   BOUTONS
   ========================================================= */
.btn {
  display: inline-block;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  border: none;
  letter-spacing: 0.3px;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.btn-outline:hover {
  background: white;
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--color-primary);
  color: white;
}

.btn-secondary:hover {
  background: var(--color-primary-dark);
  color: white;
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(15, 41, 66, 0.85) 0%, rgba(31, 78, 121, 0.75) 100%),
    url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?w=1920&q=80') center/cover;
  color: white;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(242, 166, 35, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  padding: 4rem 0;
}

.hero-badge {
  display: inline-block;
  background: rgba(242, 166, 35, 0.2);
  border: 1px solid rgba(242, 166, 35, 0.5);
  color: var(--color-accent);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  letter-spacing: 0.5px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: -0.5px;
}

.hero h1 .highlight {
  background: linear-gradient(120deg, var(--color-accent) 0%, #FFD166 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.15rem;
  margin-bottom: 2.5rem;
  opacity: 0.9;
  line-height: 1.7;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* =========================================================
   SECTIONS GENERIQUES
   ========================================================= */
section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-eyebrow {
  display: block;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  color: var(--color-primary);
  margin-bottom: 1rem;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.section-header p {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  max-width: 640px;
  margin: 0 auto;
}

/* =========================================================
   STATS
   ========================================================= */
.stats {
  background: var(--color-bg-dark);
  color: white;
  padding: 4rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
}

.stat-item {
  padding: 1rem;
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1rem;
  opacity: 0.8;
}

/* =========================================================
   SERVICES (cartes)
   ========================================================= */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--color-bg-alt);
  padding: 2.2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.service-card h3 {
  color: var(--color-primary);
  margin-bottom: 0.8rem;
  font-size: 1.3rem;
  font-weight: 700;
}

.service-card p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.service-card ul {
  list-style: none;
  margin-top: 1rem;
}

.service-card ul li {
  padding: 0.4rem 0 0.4rem 1.6rem;
  position: relative;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.service-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  transform: rotate(45deg);
}

/* =========================================================
   FEATURES (avec image)
   ========================================================= */
.features-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.features-block.reverse .features-image {
  order: 2;
}

.features-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.features-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.features-image:hover img {
  transform: scale(1.05);
}

.features-content h3 {
  color: var(--color-primary);
  font-size: 1.8rem;
  margin-bottom: 1.2rem;
  font-weight: 700;
}

.features-content p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
}

.features-list {
  list-style: none;
}

.features-list li {
  padding: 0.6rem 0 0.6rem 2.2rem;
  position: relative;
  color: var(--color-text);
}

.features-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 22px;
  height: 22px;
  background: var(--color-success);
  border-radius: 50%;
}

.features-list li::after {
  content: '';
  position: absolute;
  left: 6px;
  top: 1.05rem;
  width: 10px;
  height: 6px;
  border-left: 2px solid white;
  border-bottom: 2px solid white;
  transform: rotate(-45deg);
}

/* =========================================================
   PROCESS (étapes)
   ========================================================= */
.process {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.process-step {
  text-align: center;
  position: relative;
  padding: 1.5rem;
}

.process-number {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 auto 1.2rem;
  box-shadow: var(--shadow-md);
}

.process-step h4 {
  color: var(--color-primary);
  margin-bottom: 0.6rem;
  font-size: 1.15rem;
}

.process-step p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* =========================================================
   TESTIMONIALS
   ========================================================= */
.testimonials {
  background: var(--color-bg-alt);
}

.testimonial-card {
  background: var(--color-bg);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-accent);
}

.testimonial-text {
  font-style: italic;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
  line-height: 1.7;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.testimonial-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1.2rem;
}

.testimonial-name {
  font-weight: 600;
  color: var(--color-primary);
}

.testimonial-role {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* =========================================================
   CTA BAND
   ========================================================= */
.cta-band {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: 4rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(242, 166, 35, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.cta-band h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 1rem;
  position: relative;
  font-weight: 700;
}

.cta-band p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}

/* =========================================================
   FORMULAIRE CONTACT
   ========================================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 3rem;
  align-items: start;
}

.contact-info {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.contact-info::before {
  content: '';
  position: absolute;
  bottom: -30%;
  right: -10%;
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(242, 166, 35, 0.2) 0%, transparent 70%);
}

.contact-info h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.contact-info p {
  opacity: 0.9;
  margin-bottom: 2rem;
  position: relative;
  line-height: 1.7;
}

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.contact-detail-icon {
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-accent);
  font-size: 1.1rem;
}

.contact-detail-content h4 {
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.contact-detail-content p {
  margin: 0;
  font-size: 0.95rem;
  opacity: 0.85;
}

.contact-form {
  background: var(--color-bg-alt);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.form-group {
  margin-bottom: 1.4rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--color-primary);
  font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: all var(--transition);
  background: var(--color-bg-alt);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(46, 117, 182, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

.form-message {
  padding: 1rem;
  border-radius: var(--radius-md);
  margin-top: 1rem;
  display: none;
  font-weight: 500;
}

.form-message.success {
  background: #D1FAE5;
  color: var(--color-success);
  border-left: 4px solid var(--color-success);
  display: block;
}

.form-message.error {
  background: #FEE2E2;
  color: #B91C1C;
  border-left: 4px solid #B91C1C;
  display: block;
}

/* =========================================================
   FAQ
   ========================================================= */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item.open {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.faq-question {
  width: 100%;
  padding: 1.3rem 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--color-primary);
  font-size: 1.05rem;
  text-align: left;
  font-family: inherit;
  transition: background var(--transition);
}

.faq-question:hover {
  background: var(--color-bg);
}

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  position: relative;
  margin-left: 1rem;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-accent);
  transition: transform var(--transition);
}

.faq-icon::before { width: 14px; height: 2px; }
.faq-icon::after { width: 2px; height: 14px; }

.faq-item.open .faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
}

.faq-answer-inner {
  padding: 0 1.5rem 1.4rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.faq-item.open .faq-answer { max-height: 300px; }

/* =========================================================
   FOOTER
   ========================================================= */
footer {
  background: var(--color-bg-dark);
  color: white;
  padding: 3.5rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-col h4 {
  color: var(--color-accent);
  margin-bottom: 1.2rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-col p,
.footer-col li {
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  font-size: 0.95rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--color-accent);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: white;
}

.footer-brand .logo-icon {
  background: linear-gradient(135deg, var(--color-accent) 0%, #FFD166 100%);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.9rem;
}

/* =========================================================
   PAGE BANNER
   ========================================================= */
.page-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: 5rem 0 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(242, 166, 35, 0.15) 0%, transparent 70%);
}

.page-banner h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 0.8rem;
  position: relative;
  font-weight: 700;
}

.page-banner p {
  font-size: 1.1rem;
  opacity: 0.9;
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  position: relative;
  margin-top: 1rem;
  opacity: 0.8;
  font-size: 0.95rem;
}

.breadcrumb a {
  color: var(--color-accent);
}

/* =========================================================
   ANIMATIONS
   ========================================================= */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 968px) {
  .features-block,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .features-block.reverse .features-image { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  section { padding: 3.5rem 0; }
  .menu-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.2rem;
    box-shadow: var(--shadow-md);
    transform: translateY(-200%);
    transition: transform var(--transition);
  }
  .nav-links.open { transform: translateY(0); }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .hero { min-height: 70vh; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-number { font-size: 2.2rem; }
}