/* =========================================================
   Letit Algo — Minimal Fintech Landing + Docs
   Fonts: Ristretto Pro (headings), TT Norms (body)
   Brand colors from brandbook (page 36): #075066, #00AA9E, #E84F35, #F4A276
   ========================================================= */

:root{
  --bg: #ffffff;
  --ink: #0b1b1e;
  --muted: rgba(11,27,30,.70);
  --muted2: rgba(11,27,30,.55);

  --brand-blue: #075066;
  --brand-teal: #00AA9E;
  --brand-coral: #E84F35;
  --brand-peach: #F4A276;

  --line: rgba(7,80,102,.14);
  --card: rgba(7,80,102,.04);

  --shadow: 0 18px 50px rgba(7,80,102,.12);
  --radius: 18px;
  --radius2: 26px;

  --max: 1120px;
}

@font-face{
  font-family: "Ristretto Pro";
  src: url("../fonts/RistrettoPro/RistrettoPro-Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face{
  font-family: "Ristretto Pro";
  src: url("../fonts/RistrettoPro/RistrettoPro.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face{
  font-family: "TT Norms";
  src: url("../fonts/TTNorms/TTNorms-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face{
  font-family: "TT Norms";
  src: url("../fonts/TTNorms/TTNorms-Medium.ttf") format("truetype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face{
  font-family: "TT Norms";
  src: url("../fonts/TTNorms/TTNorms-Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* Base */
*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family:"TT Norms", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--ink);
  background: var(--bg);
  line-height:1.55;
}
a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }

.container{
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}
.section{
  padding: 80px 0;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding: 8px 12px;
  border:1px solid var(--line);
  border-radius: 999px;
  background: rgba(0,170,158,.06);
  color: var(--brand-blue);
  font-weight: 500;
  font-size: 14px;
}
.h1, h1{
  font-family:"Ristretto Pro", system-ui, sans-serif;
  letter-spacing: .2px;
  line-height: 1.02;
  font-weight: 700;
}
.h2, h2{
  font-family:"Ristretto Pro", system-ui, sans-serif;
  letter-spacing: .2px;
  line-height: 1.08;
  font-weight: 700;
}
h1{ font-size: 64px; margin: 14px 0 14px; }
h2{ font-size: 40px; margin: 0 0 14px; }
p{ margin: 0 0 12px; color: var(--muted); font-size: 18px; }

.kbd{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(7,80,102,.03);
  color: var(--brand-blue);
}

/* Buttons */
.btn-row{ display:flex; gap:12px; flex-wrap:wrap; }
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  font-weight: 700;
  transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease;
  user-select:none;
}
.btn:hover{ transform: translateY(-1px); box-shadow: var(--shadow); border-color: rgba(7,80,102,.22); }
.btn-primary{
  background: var(--brand-blue);
  color:#fff;
  border-color: rgba(7,80,102,.0);
}
.btn-primary:hover{ border-color: rgba(7,80,102,.0); }
.btn-accent{
  background: var(--brand-teal);
  color:#062a2c;
  border-color: rgba(0,170,158,.0);
}

/* Top nav */
.nav{
  position: sticky;
  top:0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,.78);
  border-bottom: 1px solid var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding: 12px 0;
}
.brand{
  display:flex; align-items:center; gap:12px;
}
.brand img{
  width:46px; height:46px; object-fit:contain;
}
.brand-name{
  display:flex; flex-direction:column; line-height:1.1;
}
.brand-name strong{
  font-family:"Ristretto Pro";
  font-size: 20px;
  color: var(--brand-blue);
}
.brand-name span{
  font-size: 13px;
  color: var(--muted2);
  font-weight: 500;
}
.nav-links{
  display:flex; gap:16px; align-items:center;
}
.nav-links a:not(.btn){
  font-weight:700;
  color: var(--brand-blue);
  padding: 10px 10px;
  border-radius: 12px;
}
.nav-links a:not(.btn):hover{
  background: rgba(0,170,158,.08);
}
.burger{
  display:none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 12px;
  padding: 10px 12px;
  font-weight: 800;
}
.mobile{
  display:none;
  padding: 10px 0 16px;
}
.mobile a{
  display:block;
  padding: 12px 12px;
  border-radius: 14px;
  border:1px solid var(--line);
  margin-top:10px;
  font-weight:800;
  color: var(--brand-blue);
  background: rgba(7,80,102,.02);
}

/* Hero */
.hero{
  padding: 46px 0 70px;
  background:
    radial-gradient(1200px 420px at 50% 0%, rgba(0,170,158,.10), transparent 60%),
    radial-gradient(1200px 420px at 85% 10%, rgba(232,79,53,.10), transparent 65%);
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 28px;
  align-items:center;
}
.hero-card{
  border: 1px solid var(--line);
  background: rgba(7,80,102,.02);
  border-radius: var(--radius2);
  padding: 18px;
  box-shadow: 0 20px 60px rgba(7,80,102,.08);
}
.hero-card .mini{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap: 12px;
}
.hero-card .mini span{
  font-size: 13px;
  color: var(--muted2);
  font-weight: 600;
}
.hero-card .eq{
  margin-top: 12px;
  border-radius: 16px;
  border: 1px solid var(--line);
  overflow:hidden;
}
.hero-card .eq img{
  width:100%;
  height:auto;
}
.sub{
  font-size: 19px;
  color: var(--muted);
  max-width: 60ch;
}
.hero-note{
  margin-top: 10px;
  font-size: 14px;
  color: var(--muted2);
}

/* Grid cards */
.grid-4{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.card{
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  padding: 18px;
}
.card h3{
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--brand-blue);
}
.card p{
  margin:0;
  font-size: 15px;
  color: var(--muted);
}
.icon-dot{
  width: 10px;
  height: 10px;
  border-radius: 99px;
  background: var(--brand-teal);
  display:inline-block;
  margin-right: 8px;
}

/* Metrics */
.metrics{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.metric{
  border: 1px solid var(--line);
  background: #fff;
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 18px 50px rgba(7,80,102,.06);
}
.metric .val{
  font-family: "Ristretto Pro";
  font-size: 40px;
  color: var(--brand-blue);
  line-height: 1;
}
.metric .lbl{
  margin-top: 6px;
  font-size: 14px;
  color: var(--muted2);
  font-weight: 700;
}

/* Steps */
.steps{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.step{
  border: 1px solid var(--line);
  background: rgba(0,170,158,.06);
  border-radius: var(--radius);
  padding: 18px;
}
.step .n{
  width: 34px; height: 34px;
  border-radius: 12px;
  background: var(--brand-blue);
  color:#fff;
  display:flex; align-items:center; justify-content:center;
  font-weight: 900;
  margin-bottom: 10px;
}
.step p{ margin:0; color: var(--muted); font-size: 16px; }

/* Split */
.split{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.list{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  background: #fff;
}
.list h3{
  margin:0 0 10px;
  font-size: 18px;
  color: var(--brand-blue);
}
.list ul{ margin:0; padding-left: 18px; color: var(--muted); }
.list li{ margin: 8px 0; }

/* Footer */
.footer{
  padding: 30px 0;
  border-top: 1px solid var(--line);
  color: var(--muted2);
  font-size: 14px;
}
.footer .row{
  display:flex;
  justify-content:space-between;
  gap: 12px;
  flex-wrap:wrap;
}
.small{
  font-size: 14px;
  color: var(--muted2);
}

/* Docs layout */
.docs{
  padding: 28px 0 80px;
}
.docs-grid{
  display:grid;
  grid-template-columns: 290px 1fr;
  gap: 18px;
  align-items:start;
}
.sidebar{
  position: sticky;
  top: 86px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: rgba(7,80,102,.02);
}
.sidebar a{
  display:block;
  padding: 10px 12px;
  border-radius: 12px;
  font-weight: 800;
  color: var(--brand-blue);
}
.sidebar a:hover{ background: rgba(0,170,158,.08); }
.sidebar a.active{
  background: rgba(0,170,158,.14);
  border: 1px solid rgba(0,170,158,.20);
}
.doc{
  border: 1px solid var(--line);
  border-radius: var(--radius2);
  padding: 26px;
  background:#fff;
  box-shadow: 0 18px 50px rgba(7,80,102,.06);
}
.doc h2{ margin-top: 10px; }
.doc h3{
  margin: 18px 0 8px;
  font-size: 18px;
  color: var(--brand-blue);
}
.doc p{ font-size: 17px; }
.hr{
  height: 1px;
  background: var(--line);
  margin: 20px 0;
}
.callout{
  border: 1px solid rgba(0,170,158,.22);
  background: rgba(0,170,158,.06);
  border-radius: var(--radius);
  padding: 16px;
  margin: 16px 0;
}
.callout strong{ color: var(--brand-blue); }
.table{
  width:100%;
  border-collapse: collapse;
  overflow:hidden;
  border-radius: 14px;
  border:1px solid var(--line);
}
.table th, .table td{
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
  text-align:left;
  font-size: 15px;
}
.table th{
  background: rgba(7,80,102,.04);
  color: var(--brand-blue);
  font-weight: 900;
}
.table tr:last-child td{ border-bottom:none; }

/* Responsive */
@media (max-width: 980px){
  h1{ font-size: 52px; }
  .hero-grid{ grid-template-columns: 1fr; }
  .grid-4{ grid-template-columns: repeat(2,1fr); }
  .metrics{ grid-template-columns: repeat(2,1fr); }
  .steps{ grid-template-columns: 1fr; }
  .split{ grid-template-columns: 1fr; }
  .docs-grid{ grid-template-columns: 1fr; }
  .sidebar{ position: relative; top: 0; }
}
@media (max-width: 720px){
  .nav-links{ display:none; }
  .burger{ display:inline-flex; }
  .mobile{ display:none; }
  .mobile.open{ display:block; }
  h1{ font-size: 44px; }
}

.exchanges{
  display:flex;
  align-items:center;
  gap:10px;
}

.exchanges img{
  height:22px;
  width:auto;
  opacity:.85;
  object-fit:contain;
  display:block;
  transition: opacity .2s ease;
}

.exchanges img:hover{
  opacity:1;
}

/* Prevent header menu wrapping */
.nav-links a{ white-space: nowrap; }

/* =========================
   Text Panels (clean blocks)
   ========================= */
.text-panel{
  margin-top: 14px;
  border: 1px solid var(--line);
  background: rgba(7,80,102,.02);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.panel-points{
  margin-top: 12px;
  display: grid;
  gap: 10px;
}

.point{
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.45;
}

.point b{ color: var(--ink); }

.point .dot{
  width: 10px;
  height: 10px;
  border-radius: 99px;
  background: rgba(0,170,158,.9);
  margin-top: 6px;
  flex: 0 0 10px;
}

.panel-note{
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 16px;
  line-height: 1.45;
}

.metrics-note{
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);

  font-size: 15px;
  font-weight: 500;
  color: var(--muted);

  letter-spacing: .1px;
}

/* Sharpe explanation */
.metric-hint{
  margin-top:6px;
  font-size:14px;
  color: var(--muted);
  line-height:1.45;
}

.metric-level{
  margin-top:4px;
  font-size:13px;
  color: var(--brand-blue);
  font-weight:600;
}

.version-row{
  display:flex;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
}

.version-pill{
  display:inline-flex;
  align-items:center;
  padding:8px 12px;
  border-radius:999px;
  background: rgba(0,170,158,.08);
  border: 1px solid rgba(0,170,158,.16);
  color: var(--brand-blue);
  font-size:14px;
  font-weight:600;
  line-height:1;
}

.version-pill b{
  font-weight:700;
  color: var(--brand-blue);
  margin-left:4px;
}

.version-link{
  color: var(--brand-blue);
  font-size:14px;
  font-weight:700;
  line-height:1;
  opacity:.88;
  transition: opacity .15s ease, transform .15s ease;
}

.version-link:hover{
  opacity:1;
  transform: translateX(1px);
}