:root { --hero1:#0c0c0b; --hero2:#1d1c18; --gold:#f4c430; --bg:#f5f2ea; --ink:#131311; --muted:#5f5b50; --line:#d9d4c6; --card:#fffdf8; --bad:#b3261e; --warn:#7a5200; }
@media (prefers-color-scheme: dark) { :root { --bg:#0c0c0b; --ink:#f4f1e8; --muted:#a8a396; --line:#2b2a26; --card:#151513; --bad:#ff8a80; --warn:#f4c430; } }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin:0; font:16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background:var(--bg); color:var(--ink); padding-bottom: env(safe-area-inset-bottom); }
.hero { background:linear-gradient(160deg,var(--hero1),var(--hero2)); color:#f4f1e8; border-bottom:3px solid var(--gold); padding:28px 18px 34px; }
.hero > * { max-width:640px; margin-inline:auto; }
.kicker { text-transform:uppercase; letter-spacing:.14em; font-size:12px; color:var(--gold); margin:0 auto 6px; font-weight:700; }
h1 { margin:0 auto 8px; font-size:clamp(26px,7vw,38px); line-height:1.1; }
.sub { margin:0 auto; opacity:.92; }
main { max-width:640px; margin:-18px auto 0; padding:0 12px 24px; display:grid; gap:14px; }
.card { background:var(--card); border:1px solid var(--line); border-radius:16px; padding:16px; box-shadow:0 2px 10px rgba(20,18,10,.06); }
h2 { font-size:15px; text-transform:uppercase; letter-spacing:.08em; color:var(--muted); margin:4px 0 10px; }
h2:not(:first-child) { margin-top:18px; }
.grid { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
label { display:flex; flex-direction:column; gap:4px; font-weight:600; font-size:14px; min-width:0; }
label small { font-weight:400; color:var(--muted); font-size:12px; }
input, select, textarea { font:inherit; font-weight:400; color:inherit; background:var(--bg); border:1px solid var(--line); border-radius:10px; padding:12px; min-height:46px; width:100%; }
input:focus, select:focus, textarea:focus, button:focus-visible { outline:3px solid var(--gold); outline-offset:1px; }
#custom-wrap { grid-column:1 / -1; }
#custom-wrap[hidden], #strength-wrap[hidden] { display:none; }
@media (max-width:420px) { .grid { grid-template-columns:1fr; } }
.profile-note { color:var(--muted); font-size:13px; margin:10px 0 0; }
button { font:inherit; font-weight:700; border-radius:12px; border:1px solid var(--line); background:var(--card); color:var(--ink); padding:13px 16px; min-height:48px; cursor:pointer; }
button.primary { background:var(--hero1); color:#f4f1e8; border-color:var(--hero1); }
@media (prefers-color-scheme: dark) { button.primary { background:var(--gold); color:#1a1500; border-color:var(--gold); } }
form button.primary { width:100%; margin-top:14px; }
.msg { border-radius:10px; padding:10px 12px; margin-top:12px; font-size:14px; }
.msg.error { border:1px solid var(--bad); color:var(--bad); }
.msg.warn { border:1px solid var(--warn); color:var(--warn); }
.msg ul { margin:0; padding-left:18px; }
.grades { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.grade { border:1px solid var(--line); border-radius:12px; padding:12px; display:flex; flex-direction:column; }
.grade .label { font-size:12px; color:var(--muted); text-transform:uppercase; letter-spacing:.08em; }
.grade .big { font-size:34px; font-weight:800; line-height:1.1; }
.grade .band { font-size:13px; color:var(--muted); }
.grade.muted .big { color:var(--muted); }
.detail { color:var(--muted); font-size:13px; margin:8px 0 0; }
.table-wrap { overflow-x:auto; }
table { width:100%; border-collapse:collapse; font-variant-numeric:tabular-nums; }
th, td { text-align:right; white-space:nowrap; padding:10px 6px; border-bottom:1px solid var(--line); }
th:first-child, td:first-child { text-align:left; }
th { font-size:12px; color:var(--muted); text-transform:uppercase; letter-spacing:.06em; }
td.elev, th.elev { color:var(--muted); }
tbody tr:last-child td { font-weight:800; }
canvas { width:100%; height:auto; border-radius:12px; border:1px solid var(--line); display:block; }
.actions { display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-top:12px; }
textarea { margin-top:10px; font-family:ui-monospace, Menlo, Consolas, monospace; font-size:13px; resize:vertical; }
.about ul { padding-left:18px; margin:0 0 10px; }
.about li { margin-bottom:6px; font-size:14px; }
.source, .disclaimer { font-size:13px; color:var(--muted); }
a { color:var(--ink); text-decoration-color:var(--gold); text-decoration-thickness:2px; text-underline-offset:3px; } @media (prefers-color-scheme: dark) { a { color:var(--gold); } }
footer { text-align:center; color:var(--muted); font-size:13px; padding:8px 12px 28px; }
@media (prefers-reduced-motion: no-preference) { button { transition: transform .08s; } button:active { transform:scale(.98); } }

/* Input card: white so it stands out from the near-black page. Same in light and dark themes. */
#form { --card:#ffffff; --ink:#131311; --muted:#4f4b40; --line:#77725f; color:var(--ink); color-scheme:light;
  background:#ffffff; border:1px solid #cfc9b8; border-top:4px solid var(--gold); box-shadow:0 8px 28px rgba(0,0,0,.35), 0 1px 0 rgba(255,255,255,.6) inset; }
@media (prefers-color-scheme: light) { #form { box-shadow:0 6px 22px rgba(20,18,10,.14); border-color:#cfc9b8; } }
#form h2 { color:#3d3a31; }
#form input, #form select { background:#ffffff; color:#131311; border:1.5px solid #77725f; }
#form input::placeholder { color:#6b6657; opacity:1; }
#form input:hover, #form select:hover { border-color:#131311; }
#form input:focus, #form select:focus { border-color:#131311; outline:3px solid var(--gold); outline-offset:1px; box-shadow:0 0 0 1px #131311; }
#form button:focus-visible { outline:3px solid #131311; outline-offset:2px; box-shadow:0 0 0 5px var(--gold); }
#form button.primary { background:#131311; color:var(--gold); border-color:#131311; }
#form .msg.error { color:#a3201a; border-color:#a3201a; }