/* ==============================================
   Variables
   ============================================== */
:root {
  --navy: #0a192f;
  --navy-dark: #060f1e;
  --blue: #00d4ff;
  --blue-dim: rgba(0, 212, 255, 0.12);
  --gray: #4a5568;
  --light-gray: #718096;
  --white: #ffffff;
  --off-white: #f8fafc;
  --border: #e2e8f0;
}

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

body {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  background: var(--white);
  color: var(--navy);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ==============================================
   Header / Nav
   ============================================== */
header {
  background: var(--navy);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 8%;
}

.logo {
  color: var(--blue);
  font-weight: 900;
  font-size: 1.3rem;
  letter-spacing: 3px;
}

nav ul { display: flex; list-style: none; gap: 30px; }

nav a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  transition: color 0.2s;
}

nav a:hover { color: var(--blue); }

/* ==============================================
   Hero
   ============================================== */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, #0d2545 100%);
  padding: 80px 8%;
  min-height: 600px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,212,255,0.07) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  gap: 60px;
}

.hero-text { flex: 1.2; }

.eyebrow {
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  margin-bottom: 18px;
  display: block;
}

h1 {
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.08;
  color: var(--white);
  margin-bottom: 25px;
  letter-spacing: -1px;
}

h1 .accent { color: var(--blue); }

.description {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.68);
  line-height: 1.75;
  max-width: 520px;
  margin-bottom: 38px;
}

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

.btn-primary {
  display: inline-block;
  padding: 14px 30px;
  background: var(--blue);
  color: var(--navy);
  text-decoration: none;
  font-weight: 800;
  font-size: 0.9rem;
  border-radius: 6px;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  letter-spacing: 0.3px;
}

.btn-primary:hover {
  background: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,212,255,0.3);
}

.btn-outline {
  display: inline-block;
  padding: 14px 30px;
  background: transparent;
  color: var(--white);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 6px;
  border: 1.5px solid rgba(255,255,255,0.3);
  transition: border-color 0.2s, color 0.2s, transform 0.2s;
  letter-spacing: 0.3px;
}

.btn-outline:hover {
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-2px);
}

/* --- Visuel orbital --- */
.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.orbit {
  position: relative;
  width: 340px;
  height: 340px;
}

.orbit-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(0,212,255,0.2);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}

.ring-1 { width: 260px; height: 260px; animation: spin 18s linear infinite; }
.ring-2 { width: 340px; height: 340px; border-color: rgba(0,212,255,0.1); animation: spin 28s linear infinite reverse; }

.center-node {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 90px; height: 90px;
  border-radius: 50%;
  background: rgba(0,212,255,0.15);
  border: 2px solid var(--blue);
  display: flex; align-items: center; justify-content: center;
  color: var(--blue);
  font-weight: 900; font-size: 1.1rem;
  z-index: 2;
  animation: pulse 3s ease-in-out infinite;
}

.sat-node {
  position: absolute;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.35);
  border-radius: 20px;
  padding: 6px 14px;
  color: var(--blue);
  font-weight: 700; font-size: 0.78rem;
  white-space: nowrap;
}

.s1 { top: 10%; left: 50%; transform: translateX(-50%); }
.s2 { top: 50%; right: 2%; transform: translateY(-50%); }
.s3 { bottom: 10%; left: 50%; transform: translateX(-50%); }
.s4 { top: 50%; left: 2%; transform: translateY(-50%); }

@keyframes spin { from { transform: translate(-50%,-50%) rotate(0deg); } to { transform: translate(-50%,-50%) rotate(360deg); } }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0,212,255,0); }
  50% { box-shadow: 0 0 20px rgba(0,212,255,0.25); }
}

/* ==============================================
   About
   ============================================== */
.about {
  padding: 90px 8%;
  background: var(--white);
}

.section-wrap { max-width: 1200px; margin: 0 auto; }

.section-header { text-align: center; margin-bottom: 55px; }

.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -0.5px;
}

.section-header.light h2 { color: var(--white); }
.section-header.light .label { color: var(--blue); }

.label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 12px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text p {
  font-size: 1.05rem;
  color: var(--gray);
  margin-bottom: 18px;
  line-height: 1.8;
}

.about-text strong { color: var(--navy); }

.stats {
  display: flex;
  gap: 35px;
  margin-top: 35px;
  padding-top: 30px;
  border-top: 1px solid var(--border);
}

.stat { display: flex; flex-direction: column; }

.stat-n {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--blue);
  line-height: 1;
}

.stat-l {
  font-size: 0.78rem;
  color: var(--light-gray);
  margin-top: 5px;
  font-weight: 600;
}

.highlights { display: flex; flex-direction: column; gap: 20px; }

.hl-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  background: var(--off-white);
  border-radius: 10px;
  border-left: 3px solid var(--blue);
  transition: transform 0.2s, box-shadow 0.2s;
}

.hl-item:hover {
  transform: translateX(5px);
  box-shadow: 0 4px 18px rgba(0,0,0,0.06);
}

.hl-icon { font-size: 1.4rem; flex-shrink: 0; margin-top: 2px; }

.hl-item strong {
  display: block;
  font-size: 0.95rem;
  color: var(--navy);
  margin-bottom: 4px;
  font-weight: 700;
}

.hl-item p {
  font-size: 0.86rem;
  color: var(--gray);
  margin: 0;
  line-height: 1.6;
}

/* ==============================================
   Expertise
   ============================================== */
.expertise {
  padding: 90px 8%;
  background: var(--navy);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
}

.card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.09);
  border-radius: 12px;
  padding: 30px 24px;
  transition: background 0.25s, border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.card:hover {
  background: rgba(0,212,255,0.07);
  border-color: rgba(0,212,255,0.3);
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0,0,0,0.35);
}

.card-ico { font-size: 1.9rem; margin-bottom: 14px; }

.card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
  line-height: 1.3;
}

.card p {
  font-size: 0.86rem;
  color: rgba(255,255,255,0.57);
  line-height: 1.7;
  margin-bottom: 18px;
}

.tags { display: flex; flex-wrap: wrap; gap: 7px; }

.tags span {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--blue);
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.22);
  padding: 3px 10px;
  border-radius: 20px;
  letter-spacing: 0.4px;
}

/* ==============================================
   Footer
   ============================================== */
footer {
  background: var(--navy-dark);
  color: var(--white);
  padding: 65px 8% 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  padding-bottom: 45px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-wrap: wrap;
}

.footer-brand strong {
  display: block;
  font-size: 1.5rem;
  font-weight: 900;
  margin-bottom: 5px;
  letter-spacing: -0.3px;
}

.footer-brand p {
  color: var(--blue);
  font-size: 0.86rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.footer-brand em {
  color: rgba(255,255,255,0.4);
  font-size: 0.83rem;
  font-style: italic;
  max-width: 300px;
  display: block;
}

.contact-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  margin-bottom: 14px;
}

.footer-email {
  display: block;
  color: var(--white);
  text-decoration: none;
  font-size: 0.92rem;
  margin-bottom: 16px;
  transition: color 0.2s;
}

.footer-email:hover { color: var(--blue); }

.linkedin-btn {
  display: inline-block;
  padding: 9px 20px;
  border: 1.5px solid rgba(255,255,255,0.2);
  border-radius: 6px;
  color: var(--white);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 600;
  transition: border-color 0.2s, color 0.2s;
}

.linkedin-btn:hover { border-color: var(--blue); color: var(--blue); }

.copyright {
  font-size: 0.76rem;
  color: rgba(255,255,255,0.28);
  padding: 18px 0;
}

/* ==============================================
   Responsive
   ============================================== */
@media (max-width: 1024px) {
  .hero-inner { flex-direction: column; text-align: center; }
  .description { margin: 0 auto 38px; }
  .hero-cta { justify-content: center; }
  .hero-visual { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  nav { padding: 15px 5%; }
  nav ul { gap: 18px; }
  .hero { padding: 60px 6%; }
  .about, .expertise { padding: 65px 6%; }
  .stats { flex-direction: column; gap: 18px; }
  .cards { grid-template-columns: 1fr; }
  footer { padding: 50px 6% 0; }
  .footer-inner { flex-direction: column; }
}