/* ═══════════════════════════════════════════════════
   PORTFOLIO — Système de design partagé
   Julien RIFFARD · Géomaticien
═══════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ── Design tokens ──────────────────────────────── */
:root {
  --bg:        #060e1c;
  --surf:      #0c1829;
  --surf2:     #112238;
  --surf3:     #1a2f48;
  --border:    rgba(255,255,255,0.06);
  --border-2:  rgba(255,255,255,0.10);

  --accent:    #00d4b4;
  --accent-d:  #00a88f;
  --accent-bg: rgba(0,212,180,0.08);
  --accent-bd: rgba(0,212,180,0.20);

  --blue:      #4580ff;
  --blue-bg:   rgba(69,128,255,0.08);
  --blue-bd:   rgba(69,128,255,0.20);

  --violet:    #818cf8;
  --violet-bg: rgba(129,140,248,0.08);
  --violet-bd: rgba(129,140,248,0.20);

  --amber:     #f59e0b;
  --amber-bg:  rgba(245,158,11,0.08);

  --green:     #22c55e;
  --green-bg:  rgba(34,197,94,0.08);
  --green-bd:  rgba(34,197,94,0.22);

  --text:      #dde8f4;
  --dim:       #7a96b0;
  --muted:     #3d5568;

  --font-h:    'Space Grotesk', sans-serif;
  --font-b:    'Inter', sans-serif;

  --r:         10px;
  --r-lg:      16px;
  --r-xl:      22px;
  --t:         0.2s ease;
  --shadow:    0 20px 50px rgba(0,0,0,0.45);
}

/* ── Reset ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-b);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

/* ── Typography ─────────────────────────────────── */
h1 { font-family: var(--font-h); font-size: clamp(2.4rem, 5vw, 4.2rem); font-weight: 700; line-height: 1.1; }
h2 { font-family: var(--font-h); font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 600; line-height: 1.2; }
h3 { font-family: var(--font-h); font-size: 1.2rem; font-weight: 600; line-height: 1.3; }
h4 { font-family: var(--font-h); font-size: 0.95rem; font-weight: 600; }

/* ── Navigation ─────────────────────────────────── */
.pf-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 3rem;
  background: rgba(6,14,28,0.55);
  backdrop-filter: blur(18px) saturate(1.4);
  border-bottom: 1px solid transparent;
  transition: background var(--t), border-color var(--t);
}
.pf-nav.scrolled {
  background: rgba(6,14,28,0.92);
  border-bottom-color: var(--border);
}
.pf-nav-logo {
  font-family: var(--font-h);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.03em;
  color: var(--text);
}
.pf-nav-logo em { color: var(--accent); font-style: normal; }
.pf-nav-links {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}
.pf-nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--dim);
  transition: color var(--t);
}
.pf-nav-links a:hover,
.pf-nav-links a.active { color: var(--text); }
.pf-nav-links a.pf-nav-cta {
  background: var(--accent);
  color: var(--bg);
  padding: 6px 18px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.8rem;
  color: #060e1c;
  transition: opacity var(--t), transform var(--t);
}
.pf-nav-cta:hover { opacity: 0.88; transform: translateY(-1px); }

/* ── Boutons ─────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #060e1c;
  font-family: var(--font-h);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 12px 26px;
  border-radius: 8px;
  border: none;
  transition: opacity var(--t), transform var(--t);
  letter-spacing: 0.02em;
}
.btn-primary:hover { opacity: 0.88; transform: translateY(-2px); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--dim);
  font-family: var(--font-h);
  font-weight: 500;
  font-size: 0.875rem;
  padding: 12px 20px;
  border-radius: 8px;
  border: 1px solid var(--border-2);
  transition: color var(--t), border-color var(--t);
}
.btn-ghost:hover { color: var(--text); border-color: var(--border-2); }

/* ── Section layout ─────────────────────────────── */
.pf-section {
  padding: 6rem 3rem;
  max-width: 1160px;
  margin: 0 auto;
}
.pf-section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 1rem;
}
.pf-section-label::before {
  content: '';
  display: block;
  width: 22px; height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.pf-section-sub {
  color: var(--dim);
  font-size: 0.95rem;
  max-width: 540px;
  margin-top: 0.5rem;
  margin-bottom: 3rem;
  line-height: 1.7;
}

/* ── Cards méthodologie ──────────────────────────── */
.pf-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}
.pf-card {
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 2rem 2rem 1.75rem;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
  text-decoration: none;
  color: inherit;
}
.pf-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 0%, rgba(0,212,180,0.05) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.pf-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,212,180,0.22);
  box-shadow: 0 20px 48px rgba(0,0,0,0.4), 0 0 0 1px rgba(0,212,180,0.08);
}
.pf-card:hover::after { opacity: 1; }

.pf-card-num {
  font-family: var(--font-h);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.25rem;
}
.pf-card-icon {
  width: 42px; height: 42px;
  border-radius: 11px;
  background: var(--accent-bg);
  border: 1px solid var(--accent-bd);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  flex-shrink: 0;
}
.pf-card-icon svg { width: 19px; height: 19px; color: var(--accent); }
.pf-card-icon.blue  { background: var(--blue-bg);   border-color: var(--blue-bd);   }
.pf-card-icon.blue svg  { color: var(--blue); }
.pf-card-icon.violet { background: var(--violet-bg); border-color: var(--violet-bd); }
.pf-card-icon.violet svg { color: var(--violet); }
.pf-card-icon.amber  { background: var(--amber-bg);  border-color: rgba(245,158,11,0.25); }
.pf-card-icon.amber svg  { color: var(--amber); }

.pf-card h3 { margin-bottom: 0.65rem; }
.pf-card p  { font-size: 0.875rem; color: var(--dim); line-height: 1.7; flex: 1; }

.pf-card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 1.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  transition: gap var(--t);
}
.pf-card:hover .pf-card-arrow { gap: 12px; }

/* ── Tags / Pills ────────────────────────────────── */
.pf-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 1rem;
}
.pf-tag {
  font-size: 0.7rem;
  font-weight: 500;
  padding: 3px 9px;
  border-radius: 20px;
  background: var(--blue-bg);
  border: 1px solid var(--blue-bd);
  color: #7da8ff;
  letter-spacing: 0.02em;
}
.pf-tag.teal   { background: var(--accent-bg); border-color: var(--accent-bd); color: var(--accent); }
.pf-tag.blue   { background: var(--blue-bg);   border-color: var(--blue-bd);   color: var(--blue); }
.pf-tag.violet { background: var(--violet-bg); border-color: var(--violet-bd); color: var(--violet); }
.pf-tag.amber  { background: var(--amber-bg);  border-color: rgba(245,158,11,0.25); color: var(--amber); }
.pf-tag.green  { background: var(--green-bg);  border-color: var(--green-bd);  color: var(--green); }

/* ── Formulaire contact ──────────────────────────── */
.pf-contact-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 3rem;
  align-items: start;
}
.pf-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.pf-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.pf-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.pf-form-group label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--dim);
  letter-spacing: 0.04em;
}
.pf-form-group input,
.pf-form-group textarea {
  background: var(--surf);
  border: 1px solid var(--border-2);
  border-radius: var(--r);
  color: var(--text);
  font-family: var(--font-b);
  font-size: 0.875rem;
  padding: 11px 14px;
  outline: none;
  transition: border-color var(--t), background var(--t);
  resize: vertical;
}
.pf-form-group input::placeholder,
.pf-form-group textarea::placeholder { color: var(--muted); }
.pf-form-group input:focus,
.pf-form-group textarea:focus {
  border-color: var(--accent);
  background: var(--surf2);
}
.pf-contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.pf-contact-link a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  transition: border-color var(--t), transform var(--t);
}
.pf-contact-link a:hover {
  border-color: var(--accent-bd);
  transform: translateX(3px);
}
.pf-contact-link-icon {
  width: 38px; height: 38px;
  border-radius: 9px;
  background: var(--surf2);
  border: 1px solid var(--border-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}
.pf-contact-link-label {
  display: block;
  font-size: 0.72rem;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.pf-contact-link-val {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
}
.pf-avail {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(0,212,180,0.06);
  border: 1px solid var(--accent-bd);
  border-radius: var(--r);
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
}
.pf-avail-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  box-shadow: 0 0 0 3px rgba(0,212,180,0.25);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(0,212,180,0.25); }
  50%       { box-shadow: 0 0 0 6px rgba(0,212,180,0.10); }
}

/* ── Footer ──────────────────────────────────────── */
.pf-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--muted);
  max-width: 100%;
}
.pf-footer-stack {
  display: flex;
  gap: 1.25rem;
  color: var(--muted);
  font-size: 0.75rem;
}

/* ── Divider ─────────────────────────────────────── */
.pf-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0 3rem;
}

/* ── Dot-grid helper ─────────────────────────────── */
.dot-grid {
  background-image: radial-gradient(circle, rgba(255,255,255,0.055) 1px, transparent 1px);
  background-size: 30px 30px;
}

/* ── Nav back link (sub-pages) ───────────────────── */
.pf-nav-left {
  display: flex;
  align-items: center;
}
.pf-nav-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--dim);
  transition: color var(--t);
  padding-right: 1rem;
  white-space: nowrap;
}
.pf-nav-back:hover { color: var(--text); }
.pf-nav-sep {
  width: 1px;
  height: 18px;
  background: var(--border-2);
  margin-right: 1rem;
  flex-shrink: 0;
}

/* ── Card heading (icon + title side by side) ────── */
.pf-card-heading {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.9rem;
}
.pf-card-heading .pf-card-icon { margin-bottom: 0; }
.pf-card-heading h3 { font-size: 1.35rem; margin-bottom: 0; }

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 900px) {
  .pf-nav { padding: 0 1.5rem; }
  .pf-nav-links { gap: 1.5rem; }
  .pf-section { padding: 4rem 1.5rem; }
  .pf-card-grid { grid-template-columns: 1fr; }
  .pf-contact-grid { grid-template-columns: 1fr; }
  .pf-footer { flex-direction: column; gap: 0.5rem; text-align: center; padding: 1.5rem; }
}
@media (max-width: 600px) {
  .pf-nav-links { display: none; }
  .pf-form-row { grid-template-columns: 1fr; }
  .pf-section { padding: 3.5rem 1.25rem; }
}