/* =============================================================
   Milligan Grid Solutions — modern energy theme
   Shared stylesheet for all pages. Structure/content unchanged.
   ============================================================= */

:root {
  --navy-900: #0b1b2b;
  --navy-800: #0f2438;
  --navy-700: #163049;
  --ink:      #1b2a3a;   /* body text on light */
  --muted:    #5b6b7d;
  --line:     #e2e8f0;
  --paper:    #ffffff;
  --paper-2:  #f5f8fb;
  --teal:     #12b3a0;
  --teal-dk:  #0e9384;
  --green:    #35c08a;
  --amber:    #f4b23e;
  --on-dark:  #e9f1f8;
  --on-dark-muted: #9db4c8;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(9, 24, 40, 0.10);
  --shadow-lg: 0 18px 50px rgba(9, 24, 40, 0.18);
  --wrap: 1080px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--teal-dk); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

/* ---------- Top navigation ---------- */
.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 27, 43, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.site-nav .wrap {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 66px; gap: 16px;
}
.brand {
  color: #fff; font-weight: 700; font-size: 1.05rem; letter-spacing: .2px;
  display: flex; align-items: center; gap: 10px;
}
.brand .spark {
  width: 12px; height: 12px; border-radius: 3px;
  background: linear-gradient(135deg, var(--teal), var(--green));
  box-shadow: 0 0 14px var(--teal);
}
.brand small { display:block; color: var(--on-dark-muted); font-weight: 500; font-size:.72rem; letter-spacing:.4px; }
.nav-links { display: flex; gap: 4px; flex-wrap: wrap; }
.nav-links a {
  color: var(--on-dark); font-weight: 500; font-size: .93rem;
  padding: 8px 14px; border-radius: 8px; transition: background .15s, color .15s;
}
.nav-links a:hover { background: rgba(255,255,255,0.08); text-decoration: none; }
.nav-links a.active { color: #fff; background: linear-gradient(135deg, var(--teal-dk), var(--teal)); }

/* ---------- Hero ---------- */
.hero {
  position: relative; color: var(--on-dark);
  background:
    linear-gradient(180deg, rgba(11,27,43,.72), rgba(11,27,43,.92)),
    linear-gradient(120deg, #0b1b2b 0%, #123049 60%, #0e3a3a 100%);
  background-size: cover; background-position: center;
  overflow: hidden;
}
.hero::after { /* subtle grid line texture */
  content:""; position:absolute; inset:0; pointer-events:none; opacity:.14;
  background-image:
    linear-gradient(rgba(255,255,255,.25) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.25) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(180deg, transparent, #000 30%, #000 70%, transparent);
}
.hero .wrap { position: relative; z-index: 1; padding: 78px 24px 84px; }
.hero .eyebrow {
  text-transform: uppercase; letter-spacing: 2.5px; font-size: .78rem;
  color: var(--teal); font-weight: 700; margin: 0 0 14px;
}
.hero h1 {
  margin: 0 0 16px; font-size: clamp(2rem, 4.4vw, 3.25rem); line-height: 1.08;
  font-weight: 800; color: #fff; letter-spacing: -.5px; max-width: 18ch;
}
.hero p.lead { margin: 0 0 26px; font-size: 1.16rem; color: var(--on-dark-muted); max-width: 58ch; }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 12px 22px; border-radius: 10px;
  font-weight: 600; font-size: .96rem; transition: transform .12s, box-shadow .12s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--teal-dk), var(--teal)); color: #fff; box-shadow: 0 8px 22px rgba(18,179,160,.34); }
.btn-ghost { border: 1px solid rgba(255,255,255,.3); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.08); }

/* Hero photo variant (set --hero-img inline on .hero) */
.hero.photo {
  background:
    linear-gradient(180deg, rgba(11,27,43,.55), rgba(11,27,43,.9)),
    var(--hero-img, none), linear-gradient(120deg,#0b1b2b,#0e3a3a);
  background-size: cover; background-position: center;
}

/* ---------- Sections ---------- */
section { padding: 64px 0; }
section.alt { background: var(--paper-2); }
.section-head { max-width: 62ch; margin-bottom: 34px; }
.section-head .kicker {
  text-transform: uppercase; letter-spacing: 2px; font-size: .74rem;
  color: var(--teal-dk); font-weight: 700; margin: 0 0 8px;
}
.section-head h2 { margin: 0 0 10px; font-size: clamp(1.5rem,2.6vw,2rem); color: var(--navy-900); letter-spacing: -.3px; }
.section-head p { margin: 0; color: var(--muted); font-size: 1.05rem; }

h2, h3 { line-height: 1.25; }

/* ---------- Cards & grids ---------- */
.grid { display: grid; gap: 20px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 22px; box-shadow: var(--shadow); position: relative;
  transition: transform .14s, box-shadow .14s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.card .ico {
  width: 40px; height: 40px; border-radius: 10px; margin-bottom: 14px;
  background: linear-gradient(135deg, rgba(18,179,160,.15), rgba(53,192,138,.15));
  display: grid; place-items: center; color: var(--teal-dk); font-size: 1.2rem;
  border: 1px solid rgba(18,179,160,.25);
}
.card h3 { margin: 0 0 8px; font-size: 1.12rem; color: var(--navy-800); }
.card p { margin: 0; color: var(--muted); font-size: .96rem; }

/* Expertise / bullet chips */
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; list-style: none; }
.chips li {
  background: var(--paper); border: 1px solid var(--line); border-radius: 999px;
  padding: 8px 16px; font-size: .92rem; color: var(--navy-800); box-shadow: var(--shadow);
}
.chips li::before { content: "▪"; color: var(--teal); margin-right: 8px; }

/* Feature row with media */
.feature { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; }
.feature .media {
  border-radius: var(--radius); min-height: 300px; box-shadow: var(--shadow-lg);
  background: var(--img, linear-gradient(135deg,#123049,#0e3a3a));
  background-size: cover; background-position: center;
  border: 1px solid var(--line);
}
.prose p { margin: 0 0 16px; }
.prose ul { margin: 0 0 16px; padding-left: 20px; }
.prose li { margin: 6px 0; }
.prose a { font-weight: 500; }

/* Stat band */
.stats { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; text-align: center; }
.stats .num { font-size: 2.4rem; font-weight: 800; color: #fff; letter-spacing: -1px; }
.stats .num span { color: var(--teal); }
.stats .lbl { color: var(--on-dark-muted); font-size: .95rem; margin-top: 4px; }
.band-dark { background: linear-gradient(120deg, var(--navy-900), var(--navy-700)); color: var(--on-dark); }

/* ---------- Publications list ---------- */
.pub-tools { display:flex; gap:12px; flex-wrap:wrap; align-items:center; margin-bottom: 26px; }
.pub-search {
  flex: 1 1 260px; padding: 11px 15px; border: 1px solid var(--line); border-radius: 10px;
  font-size: .96rem; font-family: var(--font); background: var(--paper);
}
.pub-search:focus { outline: 2px solid var(--teal); border-color: var(--teal); }
.pub-count { color: var(--muted); font-size: .92rem; white-space: nowrap; }

.pub-list { list-style: none; margin: 0; padding: 0; counter-reset: none; }
.pub-list li {
  display: grid; grid-template-columns: 52px 1fr; gap: 16px; align-items: start;
  padding: 16px 4px; border-bottom: 1px solid var(--line);
}
.pub-list li:hover { background: var(--paper-2); }
.pub-list .n {
  font-variant-numeric: tabular-nums; font-weight: 700; color: var(--teal-dk);
  background: rgba(18,179,160,.10); border: 1px solid rgba(18,179,160,.22);
  border-radius: 8px; text-align: center; padding: 4px 0; font-size: .82rem;
}
.pub-list .cite { color: var(--ink); font-size: .99rem; }
.pub-list .cite a { font-weight: 500; }
.pub-list .cite .doc-tag {
  display:inline-block; margin-left:6px; font-size:.72rem; font-weight:600;
  color: var(--teal-dk); border:1px solid rgba(18,179,160,.3); border-radius:6px;
  padding:1px 7px; vertical-align: middle;
}

/* ---------- Footer ---------- */
.site-foot { background: var(--navy-900); color: var(--on-dark-muted); padding: 46px 0 40px; }
.site-foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; }
.site-foot .brand { color:#fff; margin-bottom: 8px; }
.site-foot a { color: var(--on-dark); }
.site-foot .cols { display: flex; gap: 54px; flex-wrap: wrap; }
.site-foot h4 { color:#fff; font-size:.86rem; text-transform:uppercase; letter-spacing:1.4px; margin:0 0 12px; }
.site-foot ul { list-style:none; margin:0; padding:0; }
.site-foot li { margin: 6px 0; }
.site-foot .fine { width:100%; border-top:1px solid rgba(255,255,255,.08); margin-top: 18px; padding-top: 18px; font-size:.82rem; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .feature { grid-template-columns: 1fr; }
  .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; gap: 30px; }
  .site-nav .wrap { flex-direction: column; align-items: flex-start; min-height: 0; padding-top:12px; padding-bottom:12px; }
}