/* yourbiorhythm.com — retro 1970s nod: warm sun yellow, burnt orange, teal and olive on a soft paper ground.
   Layout: single centred column, tool first, explanation below. */
:root {
  --bg: #FBF6EC;
  --surface: #FFFFFF;
  --ink: #2B2118;
  --muted: #6B5D4F;
  --line: #E5DACA;
  --sun: #E9A23B;
  --rain: #5E8FA8;
  --phys: #C9531F;
  --emo: #2C7A8C;
  --int: #5F7A24;
  --accent: #C9531F;
  --accent-ink: #FFFFFF;
  --good: #3F7A3A;
  --warn: #B4511C;
  --font-display: "Righteous", "Arial Rounded MT Bold", "Trebuchet MS", sans-serif;
  --font-body: "Work Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1E1A16; --surface: #29231D; --ink: #F3EADB; --muted: #B7A897; --line: #3E352C;
    --sun: #F2B54F; --rain: #7FB0C8; --phys: #F07A45; --emo: #4FB3C6; --int: #A3C25A;
    --accent: #F07A45; --accent-ink: #1E1A16; --good: #8CC97F; --warn: #F2955F;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1E1A16; --surface: #29231D; --ink: #F3EADB; --muted: #B7A897; --line: #3E352C;
  --sun: #F2B54F; --rain: #7FB0C8; --phys: #F07A45; --emo: #4FB3C6; --int: #A3C25A;
  --accent: #F07A45; --accent-ink: #1E1A16; --good: #8CC97F; --warn: #F2955F;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
}
a { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid var(--sun); outline-offset: 2px; }

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}

/* Header */
.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-block: 14px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand { gap: 12px; }
.brand svg { width: 100px; height: 56px; flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-family: var(--font-display); font-size: 1.6rem; letter-spacing: 0.01em; }
.brand-sub { font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-top: 3px; }
@media (max-width: 420px) { .brand svg { width: 76px; height: 43px; } .brand-name { font-size: 1.3rem; } }
.site-nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.site-nav a[aria-current="page"], .site-nav a:hover { color: var(--ink); }

/* Hero */
.hero { padding-block: 36px 12px; }
.hero h1 { font-family: var(--font-display); font-weight: 400; font-size: clamp(2rem, 5vw, 3rem); line-height: 1.1; margin: 0 0 10px; text-wrap: balance; }
.hero p { margin: 0; color: var(--muted); max-width: 60ch; }
.est { display: inline-block; margin-top: 14px; font-size: 0.85rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }

/* Cards and forms */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin-block: 20px;
}
.form-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; flex: 1 1 200px; }
label { font-weight: 600; font-size: 0.95rem; }
input[type="date"] {
  font: inherit; color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; width: 100%;
}
.btn {
  font: inherit; font-weight: 600; cursor: pointer;
  background: var(--accent); color: var(--accent-ink);
  border: 0; border-radius: 999px; padding: 11px 22px;
}
.btn:hover { filter: brightness(1.06); }
.hint { color: var(--muted); font-size: 0.9rem; margin: 10px 0 0; }
.error { color: var(--warn); font-weight: 600; margin: 10px 0 0; }

/* Chart */
.chart-box { overflow-x: auto; }
.chart-box svg { display: block; width: 100%; min-width: 560px; height: auto; }
.legend { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 10px; font-size: 0.95rem; }
.legend span { display: inline-flex; align-items: center; gap: 8px; }
.legend i { width: 18px; height: 4px; border-radius: 2px; display: inline-block; }

/* Readings */
.reading-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.reading { border: 1px solid var(--line); border-radius: 12px; padding: 16px; background: var(--bg); min-width: 0; }
.reading h3 { margin: 0 0 4px; font-size: 1.05rem; display: flex; align-items: center; gap: 8px; }
.reading .dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; flex: none; }
.reading .pct { font-family: var(--font-display); font-size: 1.8rem; font-variant-numeric: tabular-nums; }
.reading p { margin: 6px 0 0; font-size: 0.95rem; }
.pill { display: inline-block; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; padding: 2px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
.pill.critical { color: var(--warn); border-color: var(--warn); }
.weather { font-size: 1.4rem; line-height: 1; }

.born { font-size: 1.1rem; }
.born strong { font-family: var(--font-display); font-weight: 400; font-size: 1.5rem; }

.critical-list { margin: 8px 0 0; padding-left: 20px; }

/* Article */
.article h2 { font-family: var(--font-display); font-weight: 400; font-size: 1.6rem; margin: 40px 0 8px; text-wrap: balance; }
.article h3 { margin: 24px 0 6px; font-size: 1.1rem; }
.article p, .article li { max-width: 68ch; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { font-size: 0.9rem; color: var(--muted); font-weight: 600; }
.note { border-left: 4px solid var(--sun); padding: 10px 14px; background: var(--surface); border-radius: 0 10px 10px 0; color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); margin-top: 48px; padding-block: 24px 40px; color: var(--muted); font-size: 0.9rem; }
.site-footer .wrap { display: flex; flex-direction: column; gap: 8px; }
.site-footer nav { display: flex; gap: 16px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }

[hidden] { display: none !important; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }