:root { --bg: #0f141a; --panel: #171e26; --line: #232d38; --ink: #dbe3ec; --muted: #8493a3; --cyan: #4fc3d9; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
       font: 15px/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.wrap { max-width: 820px; margin: 0 auto; padding: 0 20px; }
header { padding: 34px 0 20px; border-bottom: 1px solid var(--line); }
h1 { margin: 0; font-size: 20px; font-weight: 600; letter-spacing: .04em; }
.sub { color: var(--muted); font-size: 13px; margin-top: 5px; }
.readings { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 24px 0; }
.cell { background: var(--panel); border: 1px solid var(--line); border-radius: 5px; padding: 14px 16px; }
.cell .k { color: var(--muted); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; }
.cell .v { font-size: 25px; margin-top: 6px; color: var(--cyan); }
.cell .n { color: var(--muted); font-size: 12px; margin-top: 2px; }
h2 { font-size: 14px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted);
     margin: 30px 0 10px; font-weight: 600; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: right; padding: 7px 8px; border-bottom: 1px solid var(--line); }
th:first-child, td:first-child { text-align: left; }
th { color: var(--muted); font-weight: 500; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
p { color: #b9c4d0; }
footer { border-top: 1px solid var(--line); margin-top: 34px; padding: 18px 0 40px;
         color: var(--muted); font-size: 12px; }

/* Illustrations scale down rather than overflowing a phone. */
.figure { display: block; width: 100%; height: auto; margin: 18px 0 24px; border-radius: 6px; }