/* StreamWell design tokens and components. No framework, no build step. */
:root {
  --bg: #f4f8f9;
  --surface: #ffffff;
  --surface-2: #eef4f6;
  --line: #d9e4e8;
  --text: #11303d;
  --muted: #557080;
  --brand: #0d6e86;
  --brand-ink: #ffffff;
  --brand-soft: #dff1f5;
  --accent: #1f9d7a;
  --good: #2f9e44;
  --good-soft: #e3f4e6;
  --moderate: #d08b12;
  --moderate-soft: #fbf0d9;
  --poor: #d9480f;
  --poor-soft: #fde5da;
  --info: #3b5bdb;
  --info-soft: #e5ebff;
  /* text on the soft fills: >= 4.5:1 (WCAG AA) */
  --good-ink: #1b6b2c;
  --moderate-ink: #7a4f00;
  --poor-ink: #a8380b;
  --shadow: 0 1px 2px rgba(17, 48, 61, 0.06), 0 4px 16px rgba(17, 48, 61, 0.06);
  --radius: 14px;
  --radius-sm: 10px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c1a20;
    --surface: #12252d;
    --surface-2: #183039;
    --line: #26424d;
    --text: #e3eff3;
    --muted: #9db6c0;
    --brand: #4cc0d8;
    --brand-ink: #062027;
    --brand-soft: #143943;
    --accent: #43c79d;
    --good: #5bc46f;
    --good-soft: #17352085;
    --moderate: #f0b44a;
    --moderate-soft: #3a2e1585;
    --poor: #ff7b47;
    --poor-soft: #3d1f1485;
    --info: #8ea6ff;
    --info-soft: #1e264785;
    --good-ink: #5bc46f;
    --moderate-ink: #f0b44a;
    --poor-ink: #ff7b47;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0c1a20; --surface: #12252d; --surface-2: #183039; --line: #26424d; --text: #e3eff3; --muted: #9db6c0;
  --brand: #4cc0d8; --brand-ink: #062027; --brand-soft: #143943; --accent: #43c79d; --good: #5bc46f; --good-soft: #17352085;
  --moderate: #f0b44a; --moderate-soft: #3a2e1585; --poor: #ff7b47; --poor-soft: #3d1f1485; --info: #8ea6ff; --info-soft: #1e264785;
  --good-ink: #5bc46f; --moderate-ink: #f0b44a; --poor-ink: #ff7b47;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.25); color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.5 var(--font); }
a { color: var(--brand); }
img, svg { max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--brand) 60%, transparent); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- shell ---------- */
.topbar { position: sticky; top: 0; z-index: 1000; background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.topbar-inner { max-width: 1200px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
.logo svg { width: 30px; height: 30px; }
.nav { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.nav a { text-decoration: none; color: var(--muted); padding: 8px 12px; border-radius: 999px; font-weight: 600; font-size: 14px; }
.nav a:hover { background: var(--surface-2); color: var(--text); }
.nav a[aria-current="page"] { background: var(--brand-soft); color: var(--brand); }
main { max-width: 1200px; margin: 0 auto; padding: 24px 16px 64px; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
footer .inner { max-width: 1200px; margin: 0 auto; padding: 20px 16px 40px; display: grid; gap: 8px; }
.banner { background: var(--moderate-soft); border: 1px solid color-mix(in srgb, var(--moderate) 40%, transparent); border-radius: var(--radius-sm); padding: 10px 14px; font-size: 14px; }
.banner.info { background: var(--info-soft); border-color: color-mix(in srgb, var(--info) 35%, transparent); }

/* ---------- type ---------- */
h1, h2, h3, h4 { line-height: 1.2; letter-spacing: -0.015em; margin: 0 0 8px; }
h1 { font-size: clamp(28px, 4.2vw, 46px); }
h2 { font-size: clamp(22px, 2.6vw, 28px); }
h3 { font-size: 18px; }
h4 { font-size: 15px; }
p { margin: 0 0 12px; }
.lead { font-size: clamp(17px, 1.6vw, 20px); color: var(--muted); max-width: 60ch; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.tiny { font-size: 12px; }
.mono { font-family: var(--mono); font-size: 13px; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.08em; font-size: 12px; font-weight: 700; color: var(--brand); }

/* ---------- layout ---------- */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }
.stack > * + * { margin-top: 12px; }
.section { margin-top: 32px; }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: minmax(0, 1fr); } .nav a { padding: 6px 9px; font-size: 13px; } }
@media (max-width: 480px) { .topbar-inner { gap: 6px; padding: 8px 12px; } .logo { font-size: 16px; gap: 6px; } .logo svg { width: 26px; height: 26px; } .nav { flex-wrap: nowrap; gap: 0; } .nav a { padding: 6px 7px; } }

/* ---------- cards ---------- */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); min-width: 0; }
.card.flat { box-shadow: none; }
.card h3 { margin-bottom: 6px; }
.card .card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 10px; flex-wrap: wrap; }
.kpi { display: grid; gap: 2px; }
.kpi .v { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; }
.kpi .l { color: var(--muted); font-size: 13px; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid var(--line); background: var(--surface); color: var(--text); border-radius: 999px; padding: 10px 18px; font-weight: 600; cursor: pointer; text-decoration: none; min-height: 44px; }
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--brand); color: var(--brand-ink); border-color: var(--brand); }
.btn.primary:hover { filter: brightness(1.06); }
.btn.ghost { background: transparent; }
.btn.small { padding: 6px 12px; min-height: 34px; font-size: 14px; }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; }
.btn svg { width: 18px; height: 18px; }

/* ---------- chips, badges ---------- */
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--line); font-size: 13px; font-weight: 600; color: var(--muted); }
.badge { display: inline-flex; align-items: center; gap: 6px; border-radius: 999px; padding: 3px 10px; font-size: 12px; font-weight: 700; }
.badge.good, .lvl-0 { background: var(--good-soft); color: var(--good-ink); }
.badge.moderate, .lvl-1 { background: var(--moderate-soft); color: var(--moderate-ink); }
.badge.poor, .lvl-2 { background: var(--poor-soft); color: var(--poor-ink); }
.badge.info { background: var(--info-soft); color: var(--info); }
.badge.neutral { background: var(--surface-2); color: var(--muted); }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }

/* ---------- hero ---------- */
.hero { display: grid; grid-template-columns: 1.2fr 1fr; gap: 32px; align-items: center; padding: 16px 0 8px; }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.hero-art { background: linear-gradient(160deg, var(--brand-soft), var(--surface)); border: 1px solid var(--line); border-radius: 22px; padding: 18px; box-shadow: var(--shadow); }
@media (max-width: 900px) { .hero { grid-template-columns: 1fr; } }
.steps { counter-reset: step; display: grid; gap: 14px; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.steps .card { position: relative; padding-top: 38px; }
.steps .card::before { counter-increment: step; content: counter(step); position: absolute; top: 12px; left: 18px; width: 22px; height: 22px; border-radius: 50%; background: var(--brand); color: var(--brand-ink); font-size: 13px; font-weight: 700; display: grid; place-items: center; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }

/* ---------- visit flow ---------- */
.flow { max-width: 620px; margin: 0 auto; }
.progress { height: 6px; border-radius: 99px; background: var(--surface-2); overflow: hidden; margin: 8px 0 18px; }
.progress > span { display: block; height: 100%; background: var(--brand); border-radius: 99px; transition: width 0.25s ease; }
.q { margin: 22px 0; }
.q h3 { font-size: 19px; }
.q .science { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }
.q .help { color: var(--muted); font-size: 14px; margin: 2px 0 10px; }
.opts { display: grid; grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); gap: 10px; }
.opt { position: relative; display: grid; gap: 6px; align-content: start; justify-items: start; text-align: left; border: 2px solid var(--line); background: var(--surface); border-radius: var(--radius-sm); padding: 12px; cursor: pointer; min-height: 64px; transition: border-color 0.12s, background 0.12s; }
.opt:hover { border-color: color-mix(in srgb, var(--brand) 50%, var(--line)); }
.opt[aria-pressed="true"] { border-color: var(--brand); background: var(--brand-soft); }
.opt .t { font-weight: 700; }
.opt .d { font-size: 13px; color: var(--muted); line-height: 1.3; }
.opt svg.ic { width: 40px; height: 40px; color: var(--brand); }
.opt .sw { width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--line); }
.opt.unsure { border-style: dashed; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; background: var(--surface); }
.seg button { border: 0; background: transparent; padding: 8px 14px; cursor: pointer; font-weight: 600; min-height: 40px; color: var(--muted); }
.seg button + button { border-left: 1px solid var(--line); }
.seg button[aria-pressed="true"] { background: var(--brand); color: var(--brand-ink); }
.sides { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.sides .side { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 10px; background: var(--surface); }
.sides .side h4 { font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
@media (max-width: 520px) { .sides { grid-template-columns: 1fr; } }
.flow-nav { display: flex; justify-content: space-between; gap: 12px; padding: 14px 0; }
.flow-nav.sticky { position: sticky; bottom: 0; z-index: 500; background: linear-gradient(to top, var(--bg) 70%, transparent); }
.feel { display: grid; gap: 16px; }
.feel .item { display: grid; gap: 8px; }
.scale { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.scale button { border: 2px solid var(--line); background: var(--surface); border-radius: 10px; padding: 8px 2px; font-weight: 700; cursor: pointer; min-height: 52px; display: grid; gap: 2px; }
.scale button small { font-weight: 500; font-size: 11px; color: var(--muted); }
.scale button[aria-checked="true"] { border-color: var(--brand); background: var(--brand-soft); color: var(--brand); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { border: 1.5px solid var(--line); background: var(--surface); border-radius: 999px; padding: 8px 14px; cursor: pointer; font-weight: 600; font-size: 14px; }
.tag[aria-pressed="true"].pos { border-color: var(--good); background: var(--good-soft); color: var(--good-ink); }
.tag[aria-pressed="true"].neg { border-color: var(--poor); background: var(--poor-soft); color: var(--poor-ink); }
.flag { border: 1px solid var(--line); border-left-width: 5px; border-radius: var(--radius-sm); padding: 14px; background: var(--surface); }
.flag.check { border-left-color: var(--moderate); }
.flag.safety { border-left-color: var(--poor); background: color-mix(in srgb, var(--poor-soft) 50%, var(--surface)); }
.flag.info { border-left-color: var(--info); }
.flag .src { font-size: 12px; color: var(--muted); margin-top: 6px; }
.flag .uses { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
.result-tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 560px) { .result-tiles { grid-template-columns: 1fr; } }
.big { font-size: 34px; font-weight: 800; letter-spacing: -0.02em; line-height: 1.1; }
.bar { height: 8px; background: var(--surface-2); border-radius: 99px; overflow: hidden; }
.bar > span { display: block; height: 100%; border-radius: 99px; background: var(--brand); }
.note { display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: start; padding: 10px 0; border-top: 1px solid var(--line); }
.note:first-child { border-top: 0; }
.toggle { display: flex; gap: 12px; align-items: flex-start; padding: 10px 0; }
.toggle input { width: 20px; height: 20px; margin-top: 3px; accent-color: var(--brand); }

/* ---------- map ---------- */
.map { height: 420px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: var(--surface-2); }
.map.short { height: 300px; }
.leaflet-container { font: inherit; background: var(--surface-2); }
/* OpenStreetMap tiles in calm greys (inverted in dark mode) so the coloured site markers carry the meaning */
.basemap { filter: grayscale(1) brightness(1.05) contrast(0.88); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .basemap { filter: grayscale(1) invert(1) brightness(0.78) contrast(0.9); } }
:root[data-theme="dark"] .basemap { filter: grayscale(1) invert(1) brightness(0.78) contrast(0.9); }
.leaflet-popup-content { margin: 12px 14px; font-size: 14px; line-height: 1.45; }
.leaflet-popup-content h4 { margin: 0 0 4px; }
.map-legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 13px; color: var(--muted); margin-top: 8px; }
.sitelist { display: grid; gap: 8px; max-height: 340px; overflow: auto; }
.siteitem { display: flex; justify-content: space-between; align-items: center; gap: 10px; border: 1px solid var(--line); background: var(--surface); padding: 10px 12px; border-radius: var(--radius-sm); cursor: pointer; text-align: left; width: 100%; }
.siteitem[aria-pressed="true"] { border-color: var(--brand); background: var(--brand-soft); }

/* ---------- tables ---------- */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.table th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.table-wrap { overflow-x: auto; }

/* ---------- charts ---------- */
.chart { width: 100%; height: auto; display: block; }
.chart text { fill: var(--muted); font-size: 11px; font-family: var(--font); }
.chart .axis { stroke: var(--line); }
.chart .grid-line { stroke: var(--line); stroke-dasharray: 2 3; }
.chart .zero { stroke: var(--muted); stroke-width: 1; }

/* ---------- tabs & code ---------- */
.tabs { display: flex; gap: 6px; flex-wrap: wrap; border-bottom: 1px solid var(--line); margin-bottom: 14px; }
.tabs button { border: 0; background: transparent; padding: 10px 14px; font-weight: 600; color: var(--muted); border-bottom: 3px solid transparent; cursor: pointer; }
.tabs button[aria-selected="true"] { color: var(--brand); border-bottom-color: var(--brand); }
pre.code { background: #0f2129; color: #d6e7ee; border-radius: var(--radius-sm); padding: 14px; overflow: auto; max-height: 520px; font: 12.5px/1.5 var(--mono); margin: 0; }
pre.code .k { color: #8fd3ff; }
pre.code .s { color: #b5e48c; }
pre.code .n { color: #ffd166; }
pre.code .b { color: #ff9f80; }
.checklist { display: grid; gap: 4px; max-height: 300px; overflow: auto; font-size: 13px; }
.checklist .okk { color: var(--good); }
.checklist .bad { color: var(--poor); }

/* ---------- misc ---------- */
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 999px; font-weight: 600; z-index: 2000; box-shadow: var(--shadow); }
.legend-swatch { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; margin-right: 4px; }
.story { background: linear-gradient(135deg, var(--brand), var(--accent)); color: #fff; border-radius: 18px; padding: 20px; }
.story .big { color: #fff; }
.story .muted { color: rgba(255, 255, 255, 0.85); }
.empty { text-align: center; padding: 28px; color: var(--muted); }
hr.sep { border: 0; border-top: 1px solid var(--line); margin: 18px 0; }
.photo-preview { width: 100%; max-height: 220px; object-fit: cover; border-radius: var(--radius-sm); border: 1px solid var(--line); }
details summary { cursor: pointer; font-weight: 600; }
.pill-row { display: flex; gap: 8px; flex-wrap: wrap; }
svg.inline { width: 16px; height: 16px; vertical-align: -3px; display: inline-block; }