/* onoprienko.uk - editorial personal site. Shared across all 5 pages. */
:root {
  --ink: #1b1a17;
  --muted: #6b665c;
  --line: #e7e1d6;
  --paper: #faf7f2;
  --card: #ffffff;
  --accent: #c2410c;
  --accent-soft: #fdece2;
  --max: 960px;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

h1, h2, h3, h4 { font-family: var(--serif); line-height: 1.15; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); margin: 0 0 0.4em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin: 0 0 0.5em; }
h3 { font-size: 1.2rem; margin: 0 0 0.4em; }

p { margin: 0 0 1em; color: var(--ink); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* Navigation */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 247, 242, 0.85);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; gap: 20px; height: 68px; }
.brand { font-family: var(--serif); font-weight: 600; font-size: 1.15rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; gap: 22px; margin-left: auto; flex-wrap: wrap; }
.nav-links a { color: var(--muted); font-size: 0.95rem; }
.nav-links a.active, .nav-links a:hover { color: var(--ink); text-decoration: none; }
.nav .call {
  border: 1px solid var(--accent); color: var(--accent);
  padding: 7px 14px; border-radius: 999px; font-size: 0.9rem;
}
.nav .call:hover { background: var(--accent); color: #fff; text-decoration: none; }

/* Buttons */
.btn {
  display: inline-block; cursor: pointer; border: 0; font: inherit;
  padding: 12px 22px; border-radius: 10px; font-weight: 600; font-size: 1rem;
  transition: transform 0.06s ease, background 0.15s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #a8360a; }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { border-color: var(--ink); }

/* Hero */
.hero { padding: 80px 0 40px; }
.hero .lead { font-size: 1.25rem; color: var(--muted); max-width: 44ch; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.78rem; font-weight: 700; color: var(--accent); margin-bottom: 14px; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; align-items: center; }

/* Sections */
section.block { padding: 56px 0; border-top: 1px solid var(--line); }
.grid { display: grid; gap: 22px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 24px;
}
.card h3 { margin-top: 0; }
.card p { color: var(--muted); margin-bottom: 0; }
.pill { display: inline-block; background: var(--accent-soft); color: var(--accent); font-size: 0.8rem; font-weight: 600; padding: 3px 10px; border-radius: 999px; }

.two-col { display: grid; gap: 40px; grid-template-columns: 1.2fr 1fr; align-items: start; }
@media (max-width: 720px) { .two-col { grid-template-columns: 1fr; } }

.metric { font-family: var(--serif); font-size: 2.6rem; color: var(--accent); line-height: 1; }
.metric + p { color: var(--muted); margin-top: 6px; }

.prose { max-width: 68ch; }
.prose p, .prose li { color: #2a2822; }
.prose ul { padding-left: 1.2em; }
.prose li { margin-bottom: 0.4em; }

/* Forms */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; color: var(--muted); }
input, textarea {
  width: 100%; font: inherit; padding: 12px 14px;
  border: 1px solid var(--line); border-radius: 10px; background: #fff; color: var(--ink);
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
textarea { min-height: 120px; resize: vertical; }
.ok-msg { color: #15803d; font-weight: 600; margin-top: 10px; }

/* Pseudo-form card */
.pseudo { background: var(--accent-soft); border: 1px solid #f6d3bf; border-radius: 14px; padding: 24px; }
.pseudo .row { display: flex; gap: 10px; flex-wrap: wrap; }
.pseudo input { flex: 1 1 200px; }
.pseudo .status { margin: 12px 0 0; font-weight: 600; color: var(--accent); min-height: 1.2em; }

/* SPA demo */
.spa-demo { background: #fff; border: 1px dashed var(--line); border-radius: 14px; padding: 22px; }
.spa-demo .btns { display: flex; gap: 10px; flex-wrap: wrap; margin: 12px 0; }
.spa-demo code { background: var(--accent-soft); padding: 2px 8px; border-radius: 6px; color: var(--accent); }

.aa-flash { display: inline-block; margin-left: 12px; color: #15803d; font-weight: 600; font-size: 0.9rem; }

/* Footer */
footer.site {
  border-top: 1px solid var(--line); background: #f3eee5;
  padding: 48px 0; margin-top: 40px; color: var(--muted); font-size: 0.95rem;
}
footer.site .cols { display: flex; gap: 40px; flex-wrap: wrap; justify-content: space-between; }
footer.site a { color: var(--muted); }
footer.site a:hover { color: var(--ink); }
footer.site .brand { color: var(--ink); display: block; margin-bottom: 8px; }

.spacer-lg { height: 900px; background: linear-gradient(var(--paper), #f1ebe0); border-radius: 16px; display: flex; align-items: center; justify-content: center; color: var(--muted); }