/* nocera.dev: a bouldering wall. No external requests: system fonts, CSS-only textures. */
:root {
  --rock: #e9e4dc;
  --rock-2: #ddd6cb;
  --ink: #1f1d1a;
  --muted: #5a554d;
  --chalk: rgba(255, 255, 255, 0.55);
  --line: #c9c0b2;
  --card: #f7f4ef;
  --accent: #b5452a;
  --hold-1: #d9482b; /* red */
  --hold-2: #2f6fd6; /* blue */
  --hold-3: #2e9a5a; /* green */
  --hold-4: #e0a31a; /* yellow */
  --hold-5: #8a4fd1; /* purple */
  --focus: #0b57d0;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --rock: #1d1c1a;
    --rock-2: #262421;
    --ink: #eeeae4;
    --muted: #b4ada3;
    --chalk: rgba(255, 255, 255, 0.06);
    --line: #3a3732;
    --card: #23211e;
    --accent: #f08a6c;
    --focus: #8ab4f8;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  color: var(--ink);
  background-color: var(--rock);
  /* plywood wall: bolt-hole grid + chalk smudges */
  background-image:
    radial-gradient(circle at 12px 12px, var(--line) 2px, transparent 2.5px),
    radial-gradient(ellipse at 20% 15%, var(--chalk), transparent 40%),
    radial-gradient(ellipse at 85% 60%, var(--chalk), transparent 35%);
  background-size: 48px 48px, 100% 100%, 100% 100%;
  font: 1.0625rem/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--accent); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }

.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; background: var(--card); padding: 8px 12px; z-index: 10; }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }

header.site {
  padding: 28px 0 8px;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px;
}
.logo { font-weight: 800; letter-spacing: -0.02em; font-size: 1.25rem; color: var(--ink); text-decoration: none; }
.logo span { color: var(--accent); }

/* Navigation as climbing holds */
nav.holds ul { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; }
nav.holds a {
  display: inline-block; padding: 8px 16px; color: #fff; text-decoration: none; font-weight: 700; font-size: 0.95rem;
  border-radius: 46% 54% 42% 58% / 55% 45% 55% 45%;
  box-shadow: inset -4px -5px 0 rgba(0, 0, 0, 0.22), 0 2px 0 rgba(0, 0, 0, 0.15);
  transition: transform 0.15s ease;
}
nav.holds li:nth-child(1) a { background: var(--hold-1); }
nav.holds li:nth-child(2) a { background: var(--hold-2); }
nav.holds li:nth-child(3) a { background: var(--hold-3); color: #08200f; }
nav.holds li:nth-child(4) a { background: var(--hold-4); color: #2a1d00; }
nav.holds a:hover { transform: translateY(-2px) rotate(-2deg); }

.hero { padding: 56px 0 40px; }
.hero h1 { font-size: clamp(2.2rem, 6vw, 3.6rem); line-height: 1.05; letter-spacing: -0.03em; margin: 0 0 16px; }
.hero p { font-size: 1.2rem; color: var(--muted); max-width: 40em; margin: 0; }
.tape {
  display: inline-block; background: var(--hold-4); color: #2a1d00; font-weight: 700; font-size: 0.85rem;
  padding: 2px 10px; transform: rotate(-2deg); margin-bottom: 14px; letter-spacing: 0.04em; text-transform: uppercase;
}

section { padding: 32px 0; }
h2 { font-size: 1.6rem; letter-spacing: -0.02em; margin: 0 0 6px; }
.lead { color: var(--muted); margin: 0 0 22px; }

/* Problems (projects) as route cards with a coloured start tag */
.problems { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.problem {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px 20px 18px;
  position: relative; overflow: hidden;
}
.problem::before {
  content: ""; position: absolute; top: 0; left: 0; width: 6px; height: 100%; background: var(--c, var(--hold-1));
}
.problem h3 { margin: 0 0 4px; font-size: 1.2rem; }
.grade {
  display: inline-block; font: 700 0.8rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  padding: 4px 8px; border-radius: 6px; background: var(--c, var(--hold-1)); color: #fff; margin-bottom: 10px;
}
.problem p { margin: 0 0 10px; }
.problem ul.beta { margin: 0 0 10px; padding-left: 18px; color: var(--muted); font-size: 0.95rem; }
.problem .links a { font-weight: 600; margin-right: 14px; }

/* Skills as a grade ladder */
.ladder { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.ladder li { display: grid; grid-template-columns: 4.5rem 1fr; gap: 14px; align-items: center; }
.ladder .v { font: 700 0.95rem ui-monospace, SFMono-Regular, Menlo, monospace; text-align: right; color: var(--accent); }
.ladder .bar { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; }

.about p { max-width: 42em; }

footer.site {
  margin-top: 48px; padding: 24px 0 40px; border-top: 2px dashed var(--line); color: var(--muted); font-size: 0.95rem;
}
footer.site nav a { margin-right: 18px; }

/* Legal pages */
.doc { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 28px; margin: 24px 0; }
.doc h1 { margin-top: 0; letter-spacing: -0.02em; }
.doc h2 { font-size: 1.25rem; margin-top: 28px; }
.c1 { --c: var(--hold-1); }
.c2 { --c: var(--hold-2); }
.c3 { --c: var(--hold-3); }
.problem.c3 .grade { color: #08200f; }