/* Base */
:root {
  --bg: #0b1220;
  --panel: #0f172a;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --brand: #6366f1;
  --brand-2: #22d3ee;
  --ok: #10b981;
  --warn: #f59e0b;
  --danger: #ef4444;
  --radius: 12px;
  --shadow: 0 10px 25px rgba(0,0,0,0.35);
}

* { box-sizing: border-box }
html, body { height: 100% }
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 800px at 20% -10%, rgba(99,102,241,0.15), transparent 60%),
              radial-gradient(900px 600px at 110% 10%, rgba(34,211,238,0.12), transparent 60%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container { width: min(1100px, 92%); margin: 0 auto }

/* Bouton Retour Portfolio */
.back-to-portfolio {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 2000;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 10px 20px;
    background: rgba(102, 126, 234, 0.95);
    backdrop-filter: blur(10px);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
}

.back-to-portfolio:hover {
    background: rgba(102, 126, 234, 1);
    transform: translateX(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.back-to-portfolio i {
    font-size: 0.9rem;
}

.back-to-portfolio span {
    display: inline-block;
}

@media (max-width: 768px) {
    .back-to-portfolio {
        top: 15px;
        left: 15px;
        padding: 8px 15px;
        font-size: 0.85rem;
    }
    
    .back-to-portfolio span {
        display: none;
    }
    
    .back-to-portfolio i {
        font-size: 1rem;
    }
}

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(11,18,32,0.7); backdrop-filter: blur(8px); border-bottom: 1px solid rgba(255,255,255,0.06) }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0 }
.brand { color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: 0.2px }
.nav { display: flex; gap: 20px; align-items: center }
.nav a { color: var(--text); text-decoration: none; opacity: 0.9 }
.nav a:hover { color: white }
.nav .btn { margin-left: 6px }
.nav-toggle { display: none; background: transparent; color: var(--text); border: 1px solid rgba(255,255,255,0.15); padding: 6px 10px; border-radius: 8px }

/* Hero */
.hero { padding: 64px 0 24px }
.hero h1 { font-size: clamp(28px, 4vw, 44px); line-height: 1.15; margin: 10px 0 8px }
.subtitle { color: var(--muted); margin: 0 0 20px }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap }

/* Sections */
.section { padding: 40px 0 }
.section h2 { font-size: clamp(22px, 3vw, 32px); margin: 0 0 12px }
.muted { color: var(--muted) }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 16px; border-radius: 10px; text-decoration: none; font-weight: 600; border: 1px solid transparent }
.btn-primary { background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: white; box-shadow: var(--shadow) }
.btn-outline { border-color: rgba(255,255,255,0.25); color: var(--text) }
.btn-ghost { background: transparent; color: var(--text) }
.btn:hover { filter: brightness(1.05) }

/* Cards & Grids */
.grid { display: grid; gap: 16px }
.cards { grid-template-columns: repeat(3, minmax(0, 1fr)) }
.card { 
  background: var(--panel); 
  border: 1px solid rgba(255,255,255,0.06); 
  border-radius: var(--radius); 
  padding: 16px; 
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(99,102,241,0.1), transparent);
  transition: left 0.6s;
}

.card:hover::before {
  left: 100%;
}

.card:hover {
  transform: translateY(-5px) scale(1.02);
  border-color: rgba(99,102,241,0.3);
  box-shadow: 0 15px 35px rgba(99,102,241,0.25);
}

.card h3 { margin-top: 0 }
.price-chip { display: inline-block; margin-top: 8px; padding: 6px 10px; border-radius: 999px; border: 1px solid rgba(255,255,255,0.14); color: white; background: linear-gradient(135deg, rgba(99,102,241,0.35), rgba(34,211,238,0.25)) }

.pricing { grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: stretch }
.pricing.alt { grid-template-columns: repeat(2, minmax(0, 1fr)) }
.price-card { 
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02)); 
  border: 1px solid rgba(255,255,255,0.08); 
  border-radius: var(--radius); 
  padding: 18px; 
  box-shadow: var(--shadow);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.price-card:hover {
  transform: translateY(-10px) scale(1.03);
  box-shadow: 0 25px 50px rgba(99,102,241,0.3);
}

.price-card h3 { margin-top: 0 }
.price-card .price { font-size: 22px; margin: 4px 0 10px }
.price-card ul { margin: 0 0 14px 18px }
.price-card.featured { 
  border-color: rgba(99,102,241,0.5); 
  box-shadow: 0 20px 40px rgba(99,102,241,0.18);
  animation: glow-pulse 2s ease-in-out infinite alternate;
}

@keyframes glow-pulse {
  from {
    box-shadow: 0 20px 40px rgba(99,102,241,0.18), 0 0 30px rgba(99,102,241,0.2);
  }
  to {
    box-shadow: 0 20px 40px rgba(99,102,241,0.25), 0 0 40px rgba(99,102,241,0.35);
  }
}

.price-note { background: var(--panel); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); padding: 16px }

/* Steps */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; padding-left: 0; list-style: none }
.steps li { background: var(--panel); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); padding: 14px 14px 14px 14px; position: relative }

/* Form */
.contact-form { background: var(--panel); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow) }
.contact-form label { display: grid; gap: 6px }
.form-grid { grid-template-columns: repeat(2, 1fr) }
input, textarea { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.12); color: var(--text); border-radius: 10px; padding: 10px 12px; width: 100% }
input:focus, textarea:focus { outline: 2px solid rgba(99,102,241,0.4); border-color: rgba(99,102,241,0.5) }
.form-status { margin-top: 8px; color: var(--muted) }

/* Footer */
.site-footer { border-top: 1px solid rgba(255,255,255,0.06); padding: 16px 0; margin-top: 28px; background: rgba(0,0,0,0.25) }
.footer-inner { display: flex; align-items: center; justify-content: space-between }

/* Responsive */
@media (max-width: 980px) {
  .cards, .pricing { grid-template-columns: repeat(2, 1fr) }
  .steps { grid-template-columns: repeat(2, 1fr) }
}
@media (max-width: 640px) {
  .nav { display: none }
  .nav.open { display: flex; position: absolute; right: 4%; top: 56px; background: var(--panel); padding: 10px; border-radius: 10px; box-shadow: var(--shadow) }
  .nav-toggle { display: inline-block }
  .cards, .pricing, .pricing.alt { grid-template-columns: 1fr }
  .form-grid { grid-template-columns: 1fr }
}