/* =========================================================
   helenehedin.fr – proposition v1 (nature/forêt)
   Auteur: ChatGPT (modif libre)
   ========================================================= */

:root{
  --bg: #0b1510;
  --bg2:#0f2118;
  --card:#12261c;
  --text:#eef6f0;
  --muted:#cfe0d6;
  --accent:#7ccf9a;
  --accent2:#3aa06b;
  --border: rgba(255,255,255,.10);
  --shadow: 0 18px 55px rgba(0,0,0,.35);
  --radius: 18px;
  --max: 1100px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 20% 10%, rgba(124,207,154,.18), transparent 60%),
              radial-gradient(900px 500px at 80% 0%, rgba(58,160,107,.12), transparent 55%),
              linear-gradient(180deg, var(--bg), var(--bg2));
  line-height:1.6;
}

/* Utilities */
.container{ width: min(var(--max), calc(100% - 40px)); margin-inline:auto; }
a{ color: inherit; text-decoration: none; }
a:hover{ color: var(--accent); }
.small{ font-size:.92rem; color: var(--muted); }
.badge{
  display:inline-flex; align-items:center; gap:.5rem;
  padding:.35rem .65rem;
  border:1px solid var(--border);
  border-radius:999px;
  background: rgba(255,255,255,.04);
}
hr.sep{
  border:0; height:1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.18), transparent);
  margin: 28px 0;
}

/* Header */
header{
  position: sticky;
  top:0;
  z-index:50;
  backdrop-filter: blur(12px);
  background: rgba(11,21,16,.55);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding: 14px 0;
}
.brand{
  display:flex; flex-direction:column; gap:2px;
}
.brand strong{ font-size:1.15rem; letter-spacing:.3px; }
.brand span{ font-size:.9rem; color: var(--muted); }

nav{
  display:flex; align-items:center; gap: 14px;
}
nav a{
  padding: 10px 10px;
  border-radius: 12px;
  color: var(--muted);
}
nav a.active, nav a:hover{
  color: var(--text);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
}

/* Mobile menu */
.menu-btn{
  display:none;
  border:1px solid var(--border);
  background: rgba(255,255,255,.04);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  cursor:pointer;
}
.mobile-nav{
  display:none;
  padding: 0 0 14px 0;
}
.mobile-nav a{
  display:block;
  padding: 10px 12px;
  border-radius: 12px;
  margin-top: 8px;
  color: var(--muted);
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.03);
}

/* Hero */
.hero{
  position:relative;
  padding: 64px 0 26px 0;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute; inset:-2px;
  background:
    linear-gradient(180deg, rgba(0,0,0,.55), rgba(0,0,0,.70)),
    url("../img/forest-hero.jpg");
  background-size: cover;
  background-position: center;
  filter: saturate(1.05) contrast(1.05);
  opacity: .55;
}
.hero > .container{ position:relative; }
.hero-grid{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 26px;
  align-items: start;
}
h1{
  margin:0 0 10px 0;
  font-size: clamp(1.9rem, 3.6vw, 3.0rem);
  line-height:1.12;
  letter-spacing:.2px;
}
.lead{
  font-size: 1.08rem;
  color: var(--muted);
  max-width: 55ch;
  margin: 0 0 20px 0;
}
.actions{ display:flex; gap: 12px; flex-wrap: wrap; }
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding: 12px 16px;
  border-radius: 14px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color: var(--text);
  cursor:pointer;
  transition: transform .08s ease, background .15s ease;
}
.btn:hover{ background: rgba(255,255,255,.10); transform: translateY(-1px); }
.btn.primary{
  background: linear-gradient(135deg, rgba(124,207,154,.95), rgba(58,160,107,.95));
  border:0;
  color: #062014;
}
.btn.primary:hover{ transform: translateY(-1px); }

.hero-card{
  border:1px solid var(--border);
  background: rgba(18,38,28,.70);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.hero-card h3{ margin:0 0 8px 0; }
.hero-card ul{ margin:10px 0 0 18px; color: var(--muted); }

/* Sections */
.section{ padding: 22px 0 52px; }
.section h2{
  font-size: clamp(1.35rem, 2.4vw, 2.0rem);
  margin: 0 0 10px 0;
}
.cards{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 16px;
}
.card{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 12px 35px rgba(0,0,0,.25);
}
.card h3{ margin: 0 0 6px 0; font-size:1.05rem; }
.card p{ margin:0; color: var(--muted); }

/* Content page header */
.page-head{
  padding: 40px 0 10px;
}
.page-head h1{ font-size: clamp(1.6rem, 3.0vw, 2.4rem); }
.page{
  padding: 10px 0 54px;
}
.prose{
  border:1px solid var(--border);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius);
  padding: 18px;
}
.prose p{ color: var(--muted); margin-top: 0; }
.prose h2{ margin-top: 26px; }
.prose ul{ color: var(--muted); }

/* Contact */
.form{
  display:grid;
  gap: 12px;
  margin-top: 10px;
}
.field{
  display:grid;
  gap: 6px;
}
label{ color: var(--muted); font-size:.95rem; }
input, textarea{
  width:100%;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(0,0,0,.22);
  color: var(--text);
  outline: none;
}
input:focus, textarea:focus{
  border-color: rgba(124,207,154,.65);
  box-shadow: 0 0 0 3px rgba(124,207,154,.15);
}
textarea{ min-height: 160px; resize: vertical; }

.notice{
  border:1px solid rgba(124,207,154,.35);
  background: rgba(124,207,154,.10);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 14px;
}
.error{
  border:1px solid rgba(255,120,120,.30);
  background: rgba(255,120,120,.10);
  padding: 12px 14px;
  border-radius: 14px;
}

/* Footer */
footer{
  border-top: 1px solid var(--border);
  background: rgba(0,0,0,.18);
  padding: 22px 0;
}
.footer-grid{
  display:flex; align-items:flex-start; justify-content:space-between;
  gap: 18px;
  flex-wrap: wrap;
}
.footer-grid .small a{ text-decoration: underline; }

/* Responsive */
@media (max-width: 900px){
  .hero-grid{ grid-template-columns: 1fr; }
  .cards{ grid-template-columns: 1fr; }
  nav{ display:none; }
  .menu-btn{ display:inline-flex; }
  .mobile-nav{ display:block; }
}

@media (prefers-reduced-motion: reduce){
  .btn{ transition:none; }
}