/* ===========================================================
   Robert Maszkiewski — Data Analytics Portfolio
   Shared stylesheet. Light + professional + green data accent.
   =========================================================== */
:root{
  --ink:#15233f; --ink-soft:#4b5874; --muted:#8a93a7;
  --bg:#ffffff; --bg-soft:#f5f8fb; --line:#e6ebf2;
  --green:#1f8a5b; --green-d:#156b46; --green-soft:#e7f5ee;
  --indigo:#3b4ea0; --amber:#c98a17; --red:#c0392b;
  --radius:16px; --shadow:0 1px 2px rgba(20,35,63,.06),0 12px 30px -12px rgba(20,35,63,.18);
  --maxw:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--green-d);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.2;letter-spacing:-.02em;color:var(--ink);margin:0 0 .4em}
h1{font-size:clamp(2rem,5vw,3.3rem);font-weight:800}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:800}
h3{font-size:1.15rem;font-weight:700}
p{margin:0 0 1rem}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.muted{color:var(--muted)}
.center{text-align:center}

/* ---- nav ---- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:800;letter-spacing:-.02em;color:var(--ink);font-size:1.05rem}
.brand span{color:var(--green)}
.nav-links{display:flex;gap:26px;align-items:center}
.nav-links a{color:var(--ink-soft);font-weight:600;font-size:.95rem}
.nav-links a:hover{color:var(--green-d);text-decoration:none}
.nav-cta{background:var(--ink);color:#fff!important;padding:9px 16px;border-radius:999px;font-size:.9rem}
.nav-cta:hover{background:var(--green-d);text-decoration:none}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:.95rem;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;cursor:pointer;transition:.18s}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{background:var(--green-d);text-decoration:none;transform:translateY(-1px)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--green);color:var(--green-d);text-decoration:none}

/* ---- hero ---- */
.hero{position:relative;overflow:hidden;padding:84px 0 64px;background:
  radial-gradient(1100px 480px at 78% -8%,var(--green-soft),transparent 60%),
  radial-gradient(900px 420px at 0% 0%,#eef1fb,transparent 55%)}
.hero .eyebrow{display:inline-block;background:var(--green-soft);color:var(--green-d);
  font-weight:700;font-size:.8rem;letter-spacing:.04em;text-transform:uppercase;padding:6px 14px;border-radius:999px;margin-bottom:18px}
.hero p.lead{font-size:1.2rem;color:var(--ink-soft);max-width:640px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}

/* ---- sections ---- */
section{padding:64px 0}
.section-soft{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:640px;margin-bottom:36px}
.section-head .eyebrow{color:var(--green-d);font-weight:700;text-transform:uppercase;letter-spacing:.05em;font-size:.8rem}

/* ---- skills chips ---- */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-weight:600;font-size:.9rem;color:var(--ink-soft)}
.chip strong{color:var(--green-d)}

/* ---- case study cards ---- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:.2s;box-shadow:var(--shadow)}
.card.live:hover{transform:translateY(-4px);border-color:#cfe6da}
.card-top{padding:22px 22px 0;display:flex;justify-content:space-between;align-items:start;gap:12px}
.badge{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:5px 11px;border-radius:999px}
.badge-live{background:var(--green-soft);color:var(--green-d)}
.badge-soon{background:#f0f2f7;color:var(--muted)}
.card-body{padding:14px 22px 22px;flex:1;display:flex;flex-direction:column}
.card-body h3{margin-bottom:6px}
.card-metrics{display:flex;gap:18px;margin:14px 0 18px}
.card-metrics div{font-size:.85rem;color:var(--muted)}
.card-metrics b{display:block;font-size:1.3rem;color:var(--ink);font-weight:800}
.card-foot{margin-top:auto;display:flex;gap:14px;align-items:center}
.card.soon{opacity:.72}
.card.soon .card-foot{color:var(--muted)}
.spark{height:6px;border-radius:999px;background:linear-gradient(90deg,var(--green),#7fd1a8);margin-top:4px}

/* ---- case study page ---- */
.cs-hero{padding:54px 0 26px;background:radial-gradient(900px 360px at 85% -20%,var(--green-soft),transparent 60%)}
.cs-meta{display:flex;flex-wrap:wrap;gap:10px 22px;color:var(--ink-soft);font-size:.92rem;margin-top:8px}
.cs-meta b{color:var(--ink)}
.back{color:var(--ink-soft);font-weight:600;font-size:.9rem}
.phase{display:inline-block;font-size:.74rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  color:var(--green-d);background:var(--green-soft);padding:4px 12px;border-radius:999px;margin-bottom:10px}
.lede{font-size:1.12rem;color:var(--ink-soft);max-width:760px}
.callout{border-left:3px solid var(--green);background:var(--green-soft);padding:14px 18px;border-radius:0 12px 12px 0;margin:18px 0}

/* ---- KPI grid ---- */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin:8px 0 8px}
.kpi{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow)}
.kpi .v{font-size:1.7rem;font-weight:800;letter-spacing:-.02em}
.kpi .l{font-size:.82rem;color:var(--muted);margin-top:2px}
.kpi.good .v{color:var(--green-d)} .kpi.bad .v{color:var(--red)}

/* ---- chart blocks ---- */
.chart-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.panel h3{margin-bottom:2px}
.panel .sub{color:var(--muted);font-size:.88rem;margin-bottom:14px}
.panel.full{grid-column:1 / -1}
.chart-wrap{position:relative;height:300px}

/* ---- cohort heatmap ---- */
.cohort{width:100%;border-collapse:collapse;font-size:.78rem}
.cohort th,.cohort td{padding:6px 4px;text-align:center;border-radius:4px}
.cohort th{color:var(--muted);font-weight:600}
.cohort td.lab{text-align:left;color:var(--ink-soft);font-weight:600;white-space:nowrap;padding-right:10px}

/* ---- solutions ---- */
.sol{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.sol .panel.rec{border-color:#bfe3d0;box-shadow:0 0 0 2px var(--green-soft),var(--shadow)}
.pill{font-size:.7rem;font-weight:700;text-transform:uppercase;color:var(--green-d);background:var(--green-soft);padding:3px 9px;border-radius:999px}
.pro{color:var(--green-d)} .con{color:var(--ink-soft)}
.sol ul{margin:8px 0 0;padding-left:18px} .sol li{margin-bottom:5px}

/* ---- next steps ---- */
.steps{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.steps li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;display:flex;gap:14px}
.steps .n{flex:none;width:30px;height:30px;border-radius:999px;background:var(--ink);color:#fff;display:grid;place-items:center;font-weight:800;font-size:.9rem}

/* ---- footer ---- */
footer{background:var(--ink);color:#c9d2e4;padding:48px 0;margin-top:24px}
footer a{color:#fff;font-weight:600}
.foot-links{display:flex;flex-wrap:wrap;gap:20px;margin-top:10px}

@media(max-width:760px){
  .nav-links{gap:14px} .nav-links a.hide-sm{display:none}
  .chart-grid{grid-template-columns:1fr}
  section{padding:46px 0}
}