/* FineTuners prototype — shared styles */
:root {
  color-scheme: light;
  --canvas: #edf0ee;      /* cool grey-green page ground */
  --paper: #ffffff;
  --ink: #13211b;         /* deep green-black */
  --muted: #56645d;
  --line: #d3dad6;
  --green: #00d492;       /* brand green: buttons, handles */
  --green-ink: #00764f;   /* green for text on light */
  --on-green: #06291c;
  --check-a: #ffffff;
  --check-b: #e1e6e3;
  --logo-dark: inline-block;
  --logo-light: none;
  --display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --body: "Schibsted Grotesk", "Segoe UI", system-ui, sans-serif;
  --wrap: 1180px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --canvas: #0e1512; --paper: #16201b; --ink: #e6eee9; --muted: #95a59c; --line: #26332d;
    --green-ink: #3be3a8; --check-a: #1a2520; --check-b: #141d19;
    --logo-dark: none; --logo-light: inline-block;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --canvas: #0e1512; --paper: #16201b; --ink: #e6eee9; --muted: #95a59c; --line: #26332d;
  --green-ink: #3be3a8; --check-a: #1a2520; --check-b: #141d19;
  --logo-dark: none; --logo-light: inline-block;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--canvas); color: var(--ink);
  font: 400 17px/1.55 var(--body);
  padding-inline: 20px;
}
img { max-width: 100%; display: block; }
a { color: var(--green-ink); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--green); outline-offset: 2px;
}
.wrap { max-width: var(--wrap); margin-inline: auto; }
h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1; letter-spacing: -0.01em; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(48px, 7vw, 92px); font-weight: 800; }
h2 { font-size: clamp(36px, 4.4vw, 56px); }
h3 { font-size: 28px; font-weight: 600; }
p { margin: 0; }
.lede { font-size: 20px; color: var(--muted); max-width: 34ch; }

/* Header */
.top {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: color-mix(in srgb, var(--canvas) 88%, transparent);
  backdrop-filter: blur(10px);
  margin-inline: -20px; padding-inline: 20px;
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; gap: 28px; height: 68px; }
.logo img { height: 30px; width: auto; }
.logo .l-dark { display: var(--logo-dark); }
.logo .l-light { display: var(--logo-light); }
.nav { display: flex; gap: 24px; margin-left: 12px; }
.nav a { color: var(--ink); text-decoration: none; font-weight: 500; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--green-ink); }
.top .actions { margin-left: auto; display: flex; gap: 16px; align-items: center; }
.top .login { color: var(--muted); text-decoration: none; font-weight: 500; }
@media (max-width: 760px) { .nav, .top .login { display: none; } }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 600 16px/1 var(--body); padding: 15px 22px; border-radius: 6px;
  text-decoration: none; cursor: pointer; border: 2px solid transparent;
}
.btn-main { background: var(--green); color: var(--on-green); }
.btn-main:hover { background: #00bd82; }
.btn-ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--ink); color: var(--canvas); }
.btn-small { padding: 10px 16px; font-size: 15px; }
.btns { display: flex; flex-wrap: wrap; gap: 12px; }

/* Sections */
section { padding-block: 96px; }
.sec-head { display: grid; gap: 14px; margin-bottom: 44px; max-width: 640px; }
.sec-head p { color: var(--muted); font-size: 19px; }

/* Placeholder marker for content still to supply */
.todo {
  border: 2px dashed var(--muted); color: var(--muted); border-radius: 8px;
  display: grid; place-items: center; text-align: center; padding: 24px;
  font-size: 15px; background: repeating-linear-gradient(45deg, transparent 0 12px, color-mix(in srgb, var(--line) 45%, transparent) 12px 24px);
}
mark.todo-inline { background: none; color: inherit; border-bottom: 2px dashed var(--muted); }

/* Footer */
footer { border-top: 1px solid var(--line); padding-block: 48px 64px; color: var(--muted); font-size: 15px; }
footer .wrap { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 32px; }
footer h4 { color: var(--ink); font: 600 15px var(--body); margin: 0 0 10px; }
footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--green-ink); }
footer .about { max-width: 36ch; display: grid; gap: 14px; }
@media (max-width: 760px) { footer .wrap { grid-template-columns: 1fr 1fr; } footer .about { grid-column: 1 / -1; } }

/* Long-form (guides, notes) */
.article { max-width: 720px; margin-inline: auto; padding-block: 64px 96px; }
.article h1 { font-size: clamp(42px, 6vw, 68px); margin-bottom: 20px; }
.article h2 { font-size: 36px; margin: 48px 0 14px; }
.article h3 { font-size: 24px; margin: 28px 0 8px; }
.article p, .article li { font-size: 18px; }
.article p + p { margin-top: 14px; }
.article ul, .article ol { padding-left: 22px; display: grid; gap: 8px; }
.article .meta { color: var(--muted); font-size: 15px; display: flex; flex-wrap: wrap; gap: 6px 18px; margin-bottom: 28px; }
.answer { background: var(--paper); border-left: 4px solid var(--green); padding: 20px 24px; border-radius: 0 8px 8px 0; font-size: 19px; }
.crumbs { font-size: 14px; color: var(--muted); margin-bottom: 18px; }
.crumbs a { color: var(--muted); }
.tbl { overflow-x: auto; margin: 18px 0; }
.tbl table { border-collapse: collapse; width: 100%; font-size: 16px; font-variant-numeric: tabular-nums; }
.tbl th, .tbl td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl th { font-weight: 600; background: var(--paper); }
details { border-bottom: 1px solid var(--line); padding-block: 14px; }
summary { font-weight: 600; cursor: pointer; font-size: 18px; }
details p { margin-top: 10px; color: var(--muted); }
.article figure { margin: 24px 0; }
.article figcaption { font-size: 14px; color: var(--muted); margin-top: 8px; }