@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,600;9..144,700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --paper: #EEF0E7;
  --paper-raised: #F7F8F2;
  --ink: #1F2E27;
  --ink-soft: #4A584F;
  --line: #C9CDBF;
  --copper: #B5652C;
  --copper-dark: #8F4E20;
  --teal: #3F6659;
  --radius: 2px;
}

*{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1,h2,h3{
  font-family: 'Fraunces', serif;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin: 0 0 .4em;
}

a{ color: var(--copper-dark); }
a:focus-visible, button:focus-visible, input:focus-visible{
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.wrap{ max-width: 880px; margin: 0 auto; padding: 0 20px; }

header.site{
  border-bottom: 1px solid var(--line);
  background: var(--paper-raised);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding: 18px 0;
  flex-wrap: wrap; gap: 10px;
}
.brand{
  font-family:'Fraunces', serif; font-weight:700; font-size:1.3rem;
  display:flex; align-items:center; gap:8px; text-decoration:none; color: var(--ink);
}
.brand .mark{
  display:inline-block; width:10px; height:10px; background: var(--copper);
  border-radius: 50%;
}
.nav ul{ list-style:none; display:flex; gap:22px; margin:0; padding:0; flex-wrap:wrap; }
.nav a{ text-decoration:none; color: var(--ink-soft); font-size:.95rem; border-bottom: 1px solid transparent; }
.nav a:hover{ color: var(--ink); border-bottom-color: var(--copper); }

.hero{ padding: 56px 0 40px; border-bottom: 1px dashed var(--line); }
.eyebrow{
  font-family:'IBM Plex Mono', monospace; font-size:.78rem; letter-spacing:.12em;
  text-transform: uppercase; color: var(--teal); display:block; margin-bottom: 14px;
}
.hero h1{ font-size: 2.4rem; max-width: 14ch; }
.hero p.lead{ max-width: 52ch; color: var(--ink-soft); font-size: 1.05rem; }

.tools-grid{
  display:grid; grid-template-columns: repeat(auto-fit,minmax(220px,1fr));
  gap: 14px; margin: 32px 0 56px;
}
.tool-card{
  background: var(--paper-raised);
  border: 1px solid var(--line);
  padding: 20px;
  text-decoration:none; color: var(--ink);
  transition: transform .15s ease, border-color .15s ease;
}
.tool-card:hover{ transform: translateY(-2px); border-color: var(--copper); }
.tool-card .num{ font-family:'IBM Plex Mono',monospace; color: var(--copper-dark); font-size:.85rem; }
.tool-card h3{ margin: 8px 0 6px; font-size:1.15rem; }
.tool-card p{ margin:0; color: var(--ink-soft); font-size: .92rem; }

.calc{
  background: var(--paper-raised);
  border: 1px solid var(--line);
  padding: 28px;
  margin: 28px 0 40px;
}
.calc h2{ font-size: 1.5rem; margin-bottom: 4px; }
.calc .sub{ color: var(--ink-soft); font-size: .95rem; margin-bottom: 22px; }
.field{ margin-bottom: 16px; }
.field label{
  display:block; font-size: .85rem; color: var(--ink-soft); margin-bottom: 6px;
  font-family:'IBM Plex Mono', monospace;
}
.field input{
  width:100%; padding: 10px 12px; font-size: 1rem;
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  font-family:'IBM Plex Mono', monospace;
}
.calc-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 520px){ .calc-grid{ grid-template-columns: 1fr; } }

button.calc-btn{
  background: var(--ink); color: #fff; border:none; padding: 12px 24px;
  font-family:'IBM Plex Mono', monospace; font-size: .95rem; cursor:pointer;
  margin-top: 6px;
}
button.calc-btn:hover{ background: var(--copper-dark); }

.receipt{
  margin-top: 26px; background: #fff; border: 1px solid var(--line);
  padding: 22px 20px; font-family:'IBM Plex Mono', monospace;
  position: relative; display:none;
}
.receipt.show{ display:block; animation: tear .25s ease; }
@keyframes tear{ from{ opacity:0; transform: translateY(-6px);} to{opacity:1; transform:none;} }
.receipt::before{
  content:""; position:absolute; top:-1px; left:0; right:0; height:6px;
  background: repeating-linear-gradient(90deg, transparent 0 8px, var(--paper) 8px 10px);
}
.receipt-row{
  display:flex; justify-content:space-between; padding: 6px 0;
  border-bottom: 1px dotted var(--line); font-size: .92rem;
}
.receipt-row:last-child{ border-bottom:none; font-weight:600; padding-top:12px; }
.receipt-row .val{ color: var(--copper-dark); }

.page-content{ padding: 40px 0 60px; }
.page-content h1{ font-size: 2rem; }
.page-content h2{ font-size: 1.3rem; margin-top: 1.6em; }
.page-content p{ color: var(--ink-soft); }
.page-content ul{ color: var(--ink-soft); }

footer.site{
  border-top: 1px solid var(--line); padding: 30px 0; margin-top: 40px;
  font-size: .85rem; color: var(--ink-soft);
}
footer.site .wrap{ display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; }
footer.site a{ color: var(--ink-soft); margin-right: 14px; text-decoration:none; }
footer.site a:hover{ color: var(--copper-dark); }

.ad-slot{
  border: 1px dashed var(--line); background: var(--paper-raised);
  text-align:center; color: var(--ink-soft); font-size:.8rem;
  padding: 14px; margin: 30px 0; font-family:'IBM Plex Mono',monospace;
}