:root{
  --bg:#ffffff;
  --surface:#ffffff;
  --surface-soft:#f8fafc;
  --text:#0f172a;
  --muted:#475569;
  --border:#e2e8f0;
  --brand:#0f766e;
  --brand-strong:#115e59;
  --brand-soft:#ecfeff;
  --shadow:0 12px 30px rgba(15,23,42,.06);
  --shadow-hover:0 20px 40px rgba(15,23,42,.10);
  --radius:18px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--text);
  font-family:Inter, Arial, sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}

.container{
  width:min(1180px, calc(100% - 32px));
  margin:0 auto;
  padding:24px 0 56px;
}

.hdd-topbar{
  display:flex;
  flex-wrap:wrap;
  gap:10px 14px;
  align-items:center;
  margin-bottom:18px;
  padding:14px 0 16px;
  border-bottom:1px solid var(--border);
}
.hdd-topbar a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border-radius:999px;
  border:1px solid var(--border);
  background:var(--surface);
  color:var(--text);
  font-weight:700;
  transition:border-color .15s ease, transform .15s ease, box-shadow .15s ease, color .15s ease;
}
.hdd-topbar a:hover{
  transform:translateY(-1px);
  border-color:#cbd5e1;
  box-shadow:0 8px 18px rgba(15,23,42,.05);
  text-decoration:none;
}
.hdd-topbar a.secondary{
  color:var(--brand);
  border-color:#dbeafe;
  background:#f8fafc;
}
.hdd-topbar a.secondary:hover{
  border-color:var(--brand);
}

.hdd-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 12px;
  border-radius:999px;
  background:var(--brand-soft);
  border:1px solid #a5f3fc;
  color:var(--brand);
  font-size:.82rem;
  font-weight:800;
  letter-spacing:.02em;
  margin-bottom:14px;
}

.hdd-hero{
  padding:28px 0 20px;
}
.hdd-hero-grid{
  display:grid;
  grid-template-columns:1.35fr .95fr;
  gap:28px;
  align-items:start;
}

.hdd-title{
  font-size:clamp(2.1rem, 4vw, 3.75rem);
  line-height:1.02;
  letter-spacing:-.04em;
  margin:0 0 12px;
}

.hdd-subtitle,
.hdd-copy,
.hdd-muted{
  color:var(--muted);
}
.hdd-subtitle{
  font-size:1.06rem;
  max-width:68ch;
  margin:0 0 22px;
}

.hdd-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-bottom:18px;
}

.hdd-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:12px 18px;
  border-radius:14px;
  font-weight:800;
  border:1px solid transparent;
  transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease, background .15s ease;
}
.hdd-btn:hover{
  transform:translateY(-1px);
  text-decoration:none;
}
.hdd-btn-primary{
  background:var(--brand);
  color:#fff;
  box-shadow:0 10px 24px rgba(15,118,110,.16);
}
.hdd-btn-primary:hover{
  background:var(--brand-strong);
  color:#fff;
}
.hdd-btn-secondary{
  background:#fff;
  color:var(--brand);
  border-color:#cbd5e1;
}
.hdd-btn-secondary:hover{
  border-color:var(--brand);
  color:var(--brand);
}

.hdd-panel,
.hdd-card,
.hdd-step,
.hdd-box{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}

.hdd-panel{
  padding:22px;
  background:linear-gradient(180deg,#ffffff 0%,#f8fafc 100%);
}
.hdd-panel h2,
.hdd-box h2{
  margin:0 0 10px;
  font-size:1.08rem;
  letter-spacing:-.01em;
}

.hdd-stat-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:12px;
  margin-top:16px;
}
.hdd-stat{
  background:#fff;
  border:1px solid var(--border);
  border-radius:14px;
  padding:14px;
}
.hdd-stat strong{
  display:block;
  margin-bottom:4px;
  color:var(--text);
}
.hdd-stat span{
  color:#64748b;
  font-size:.92rem;
}

.hdd-section{
  padding:18px 0 8px;
}
.hdd-section h2{
  margin:0 0 12px;
  font-size:1.4rem;
  letter-spacing:-.02em;
}
.hdd-section-copy{
  max-width:72ch;
  color:var(--muted);
  margin:0 0 18px;
}

.hdd-card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
}
.hdd-card{
  display:flex;
  flex-direction:column;
  gap:12px;
  min-height:190px;
  padding:20px;
  transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.hdd-card:hover{
  transform:translateY(-2px);
  border-color:#cbd5e1;
  box-shadow:var(--shadow-hover);
}
.hdd-card-badge{
  display:inline-flex;
  align-self:flex-start;
  padding:5px 10px;
  border-radius:999px;
  background:#f0fdfa;
  color:var(--brand);
  font-size:.72rem;
  font-weight:800;
  text-transform:uppercase;
  letter-spacing:.04em;
}
.hdd-card h3{
  margin:0;
  font-size:1.12rem;
}
.hdd-card p{
  margin:0;
  color:var(--muted);
  flex:1;
}

.hdd-steps{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
}
.hdd-step{
  padding:20px;
  transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.hdd-step:hover{
  transform:translateY(-2px);
  border-color:#cbd5e1;
  box-shadow:var(--shadow-hover);
}
.hdd-step-number{
  display:inline-flex;
  width:34px;
  height:34px;
  border-radius:999px;
  align-items:center;
  justify-content:center;
  background:var(--brand);
  color:#fff;
  font-weight:800;
  margin-bottom:14px;
}
.hdd-step h3{
  margin:0 0 8px;
}
.hdd-step p{
  margin:0;
  color:var(--muted);
}

.hdd-quicklinks,
.hdd-chiplist{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.hdd-pill,
.hdd-chip{
  display:inline-flex;
  padding:10px 14px;
  border-radius:999px;
  border:1px solid #d1d5db;
  background:#fff;
  color:var(--text);
  font-weight:700;
  transition:border-color .15s ease, transform .15s ease, box-shadow .15s ease, color .15s ease;
}
.hdd-pill:hover,
.hdd-chip:hover{
  transform:translateY(-1px);
  text-decoration:none;
  border-color:var(--brand);
  color:var(--brand);
  box-shadow:0 8px 18px rgba(15,23,42,.05);
}

.hdd-facts{
  margin:0;
  padding-left:18px;
  color:#334155;
}

@media (max-width: 980px){
  .hdd-hero-grid,
  .hdd-card-grid,
  .hdd-steps,
  .hdd-stat-grid{
    grid-template-columns:1fr;
  }
}