/* Profil refrakcji z radiosondażu: styl spójny z resztą OGraf.pl (czcionki systemowe, bez pobierania) */
:root {
    --text: #1f2933; --muted: #5b6770; --head: #14304a; --accent: #1b6ca8; --accent-2: #4fd1e5;
    --rule: #d5dce3; --panel: #f3f6f9; --bg: #ffffff; --navy: #0f2438; --navy-2: #17415f; --warn: #b45309;
    --sans: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Roboto, "Noto Sans", "DejaVu Sans", Arial, sans-serif;
    --mono: "Cascadia Mono", "Cascadia Code", Consolas, "SF Mono", Menlo, "DejaVu Sans Mono", monospace;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: var(--sans); font-size: 16px; line-height: 1.65; color: var(--text); background: var(--bg); }
a { color: var(--accent); }
a:focus-visible, button:focus-visible { outline: 3px solid #ffd166; outline-offset: 2px; }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }

/* Menu i nagłówek strony */
.topbar { background: var(--navy); }
.menu { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 24px; margin: 0; padding: 12px 0; font-size: 0.95rem; }
.menu a { color: #cfe3f1; text-decoration: none; font-weight: 600; }
.menu a:hover, .menu a[aria-current] { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.pagehead { background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%); color: #fff; }
.pagehead .wrap { padding-top: 34px; padding-bottom: 34px; }
.pagehead h1 { margin: 0 0 4px; font-size: 2.1rem; letter-spacing: -0.01em; line-height: 1.15; }
.pagehead p { margin: 0; color: #a9c8de; }

/* Treść */
main section { padding: 36px 0 4px; }
h2 { font-size: 1.3rem; color: var(--head); margin: 0 0 14px; padding-bottom: 6px; border-bottom: 1px solid var(--rule); }
h3 { font-size: 1.05rem; color: var(--accent); margin: 1.4em 0 0.4em; }
p { margin: 0 0 12px; }
ol, ul { padding-left: 1.4em; }
li { margin: 0.35em 0; }
code { font-family: var(--mono); font-size: 0.9em; background: var(--panel); border: 1px solid var(--rule); padding: 1px 5px; border-radius: 2px; }

/* Kalkulator */
.calc { background: var(--panel); border: 1px solid var(--rule); border-top: 3px solid var(--accent); padding: 18px 20px; }
.calc .row { display: flex; flex-wrap: wrap; gap: 16px 24px; align-items: flex-end; }
.calc .field { flex: 1 1 220px; }
.calc label { display: block; font-weight: 600; color: var(--head); margin-bottom: 4px; font-size: 0.95rem; }
.calc select, .calc input[type="number"] { width: 100%; font: inherit; padding: 8px 10px; border: 1px solid #b9c4cf; background: #fff; color: var(--text); border-radius: 2px; }
.calc select:focus, .calc input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.calc button { font: inherit; font-weight: 600; padding: 9px 22px; background: var(--accent); color: #fff; border: 1px solid var(--accent); border-radius: 2px; cursor: pointer; }
.calc button:hover { background: #155a8c; }
.result { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--rule); }
.result .label { color: var(--muted); font-size: 0.9rem; }
.result .value { font-size: 1.9rem; font-weight: 600; color: var(--head); font-variant-numeric: tabular-nums; }
.result .eq { color: var(--muted); font-size: 1rem; font-weight: 400; }
.result.error .value { color: #b3261e; }
.eq-formula { background: var(--panel); border-left: 3px solid var(--accent); padding: 10px 14px; margin: 12px 0; font-family: var(--mono); font-size: 0.95rem; overflow-x: auto; }
.note { background: #fdf6e3; border-left: 3px solid #c9971c; padding: 10px 16px; margin: 22px 0 6px; font-size: 0.95rem; }

.footer { margin-top: 56px; background: var(--navy); color: #a9c8de; font-size: 0.88rem; }
.footer .wrap { padding-top: 18px; padding-bottom: 18px; }
.footer p { margin: 0; }
.footer a { color: #cfe3f1; }

@media (max-width: 760px) { .pagehead h1 { font-size: 1.6rem; } }

/* Wczytywanie pliku */
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); border: 0; white-space: nowrap; }
.upload { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; margin: 14px 0; }
.upload-btn { display: inline-block; font-weight: 600; padding: 9px 22px; background: var(--accent); color: #fff; border: 1px solid var(--accent); border-radius: 2px; cursor: pointer; }
.upload-btn:hover { background: #155a8c; }
.sr-only:focus-visible + .upload-name, .upload:focus-within .upload-btn { outline: 3px solid #ffd166; outline-offset: 2px; }
.upload-name { color: var(--muted); font-size: 0.95rem; overflow-wrap: anywhere; }
.status { margin: 0 0 14px; padding: 10px 14px; border-left: 3px solid var(--accent); background: var(--panel); font-weight: 600; }
.status.ok { border-left-color: #2f855a; background: #eaf6ee; color: #1e5a3a; }
.status.err { border-left-color: #b3261e; background: #fdecea; color: #8c1d18; }
.status[hidden] { display: none; }
.calc { margin-top: 10px; }
.calc .field { flex: 1 1 160px; }

/* Wykresy i tabela */
.grid-charts { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-charts > div { min-width: 0; }
.chart-card { border: 1px solid var(--rule); border-top: 3px solid var(--accent); padding: 4px 14px 14px; background: #fff; }
.chart-card h3 { margin: 10px 0 8px; text-align: center; }
.chart-box { position: relative; height: 420px; width: 100%; }
.table-box { max-height: 320px; overflow: auto; border: 1px solid var(--rule); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; font-variant-numeric: tabular-nums; }
th, td { padding: 6px 12px; text-align: right; border-bottom: 1px solid #edf1f4; white-space: nowrap; }
th { background: var(--panel); position: sticky; top: 0; color: var(--head); }
td.center { text-align: center; color: var(--muted); }
td.k-wysokie { font-weight: 700; color: #155a8c; }
td.k-niskie { font-weight: 700; color: #b91c1c; }
@media (max-width: 850px) { .grid-charts { grid-template-columns: 1fr; } .chart-box { height: 340px; } }