/* Northfield Works — public site */
:root{
  --bg:#f7f6f3; --bg2:#ffffff; --fg:#17181c; --fg-dim:#54575f;
  --accent:#3a3aff; --accent2:#7b5cff; --border:rgba(0,0,0,.08);
  --card:#ffffff; --shadow:0 10px 30px rgba(20,20,40,.08);
  --radius:16px;
}
:root[data-theme="dark"]{
  --bg:#0c0d10; --bg2:#121318; --fg:#f2f2f4; --fg-dim:#a7a9b3;
  --accent:#8b8bff; --accent2:#b89bff; --border:rgba(255,255,255,.1);
  --card:#17181f; --shadow:0 10px 30px rgba(0,0,0,.4);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--fg);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased; overflow-x:hidden; transition:background .3s ease,color .3s ease;
}
a{color:inherit}
.container{max-width:1100px; margin:0 auto; padding:0 20px}
img{max-width:100%}

/* nav */
nav.site-nav{
  position:sticky; top:0; z-index:50; display:flex; align-items:center; justify-content:space-between;
  padding:16px 20px; background:color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter:blur(10px); border-bottom:1px solid var(--border);
}
.brand{font-weight:700; font-size:1.05rem; letter-spacing:-.01em; text-decoration:none; display:flex; align-items:center; gap:8px}
.brand .dot{width:9px;height:9px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));display:inline-block}
.nav-links{display:flex; gap:22px; align-items:center}
.nav-links a{text-decoration:none; font-size:.92rem; font-weight:500; color:var(--fg-dim); min-height:44px; display:flex; align-items:center}
.nav-links a:hover{color:var(--fg)}
.theme-btn{
  border:1px solid var(--border); background:var(--card); color:var(--fg);
  width:40px; height:40px; min-height:44px; border-radius:50%; cursor:pointer;
  display:flex; align-items:center; justify-content:center; font-size:1rem;
}

/* hero */
.hero{position:relative; padding:96px 20px 80px; text-align:center; overflow:hidden}
#heroCanvas{position:absolute; inset:0; width:100%; height:100%; z-index:0; opacity:.55}
.hero-inner{position:relative; z-index:1; max-width:760px; margin:0 auto}
.eyebrow{
  display:inline-block; font-size:.78rem; font-weight:600; letter-spacing:.08em; text-transform:uppercase;
  color:var(--accent); background:color-mix(in srgb, var(--accent) 12%, transparent);
  padding:6px 14px; border-radius:999px; margin-bottom:22px;
}
.hero h1{
  font-size:clamp(2.1rem,6vw,3.6rem); line-height:1.08; margin:0 0 18px; font-weight:800; letter-spacing:-.02em;
}
.hero h1 .grad{background:linear-gradient(120deg,var(--accent),var(--accent2)); -webkit-background-clip:text; background-clip:text; color:transparent}
.hero p.lead{font-size:clamp(1.02rem,2vw,1.2rem); color:var(--fg-dim); max-width:560px; margin:0 auto 34px; line-height:1.55}
.hero-ctas{display:flex; gap:14px; justify-content:center; flex-wrap:wrap}
.btn{
  display:inline-flex; align-items:center; justify-content:center; min-height:44px; padding:0 22px;
  border-radius:12px; font-weight:600; font-size:.95rem; text-decoration:none; border:1px solid transparent;
  cursor:pointer; transition:transform .15s ease, box-shadow .15s ease;
}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--fg); color:var(--bg); box-shadow:var(--shadow)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{background:transparent; border-color:var(--border); color:var(--fg)}
.btn-ghost:hover{background:var(--card)}

/* sections */
section{padding:72px 0}
.section-head{max-width:640px; margin:0 auto 44px; text-align:center}
.section-head .kicker{font-size:.78rem; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--accent); margin-bottom:10px}
.section-head h2{font-size:clamp(1.6rem,3.4vw,2.3rem); margin:0 0 12px; letter-spacing:-.01em}
.section-head p{color:var(--fg-dim); margin:0; line-height:1.6}

.reveal{opacity:0; transform:translateY(22px); transition:opacity .6s ease, transform .6s ease}
.reveal.in{opacity:1; transform:none}

/* build cards */
.grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:20px}
.card{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius);
  padding:26px 24px; box-shadow:var(--shadow); position:relative; will-change:transform;
  transition:box-shadow .2s ease;
}
.card:hover{box-shadow:0 18px 40px rgba(20,20,40,.14)}
.card .icon{
  width:42px; height:42px; border-radius:11px; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg,var(--accent),var(--accent2)); color:#fff; font-size:1.1rem; margin-bottom:16px;
}
.card h3{margin:0 0 8px; font-size:1.12rem; letter-spacing:-.005em}
.card p{margin:0 0 14px; color:var(--fg-dim); font-size:.92rem; line-height:1.55}
.card a.card-link{
  font-size:.86rem; font-weight:600; color:var(--accent); text-decoration:none; display:inline-flex; align-items:center; gap:4px;
  min-height:44px; align-items:center;
}
.card a.card-link:hover{text-decoration:underline}

/* approach */
.principles{display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:28px; max-width:900px; margin:0 auto}
.principle{text-align:left}
.principle .num{font-size:.78rem; font-weight:700; color:var(--accent); letter-spacing:.06em; margin-bottom:8px}
.principle h4{margin:0 0 8px; font-size:1.02rem}
.principle p{margin:0; color:var(--fg-dim); font-size:.9rem; line-height:1.55}

/* timeline */
.timeline{max-width:640px; margin:44px auto 0; position:relative; padding-left:26px; border-left:2px solid var(--border)}
.tl-item{position:relative; padding-bottom:28px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute; left:-31px; top:3px; width:10px;height:10px;border-radius:50%;background:var(--accent)}
.tl-item h5{margin:0 0 4px; font-size:.98rem}
.tl-item p{margin:0; color:var(--fg-dim); font-size:.88rem; line-height:1.5}

/* contact */
#contact{background:var(--bg2); border-top:1px solid var(--border); border-bottom:1px solid var(--border)}
form#contactForm{max-width:560px; margin:0 auto; display:flex; flex-direction:column; gap:14px}
.field{display:flex; flex-direction:column; gap:6px}
.field label{font-size:.82rem; font-weight:600; color:var(--fg-dim)}
.field input, .field textarea{
  padding:13px 14px; min-height:44px; border-radius:10px; border:1px solid var(--border);
  background:var(--card); color:var(--fg); font-size:.95rem; font-family:inherit; resize:vertical;
}
.field input:focus, .field textarea:focus{outline:2px solid var(--accent); outline-offset:1px}
.hp-field{position:absolute; left:-9999px; top:-9999px; opacity:0; height:0; width:0}
#contactMsg{font-size:.88rem; min-height:20px}
#contactMsg.ok{color:#1a8a4a}
#contactMsg.err{color:#c4433a}

footer{padding:40px 20px 56px; text-align:center; color:var(--fg-dim); font-size:.85rem}
footer .foot-row{display:flex; align-items:center; justify-content:center; gap:10px}
.hq-dot{
  width:7px; height:7px; border-radius:50%; background:transparent; border:none; cursor:pointer;
  display:inline-block; padding:14px; margin:-14px; opacity:.35;
}
.hq-dot::after{content:""; display:block; width:7px; height:7px; border-radius:50%; background:var(--fg-dim)}
.hq-dot:hover{opacity:.9}

@media (max-width:480px){
  .hero{padding:72px 16px 56px}
  section{padding:56px 0}
  .nav-links{gap:14px}
  .nav-links a span{display:none}
}