/* ETF web: tokens, layout and shared pieces (contract 4 "Style"; docs/web.md "CSS").
   Tokens (docs/interfaces.md): --bg --fg --muted --line --accent --up --down, plus --surface
   (cards, inputs), --accent-fg (text on accent), --ok --warn --bad (notices), --focus.
   Light and dark follow prefers-color-scheme. One column under 768 px. Page CSS (search.css,
   etf.css) builds on these; no inline styles anywhere (CSP style-src 'self'). */
:root {
  color-scheme: light dark;
  --bg: #f6f7f9; --surface: #ffffff; --fg: #1b2230; --muted: #5b6676; --line: #dde2e9;
  --accent: #1f5fbf; --accent-fg: #ffffff; --up: #157a42; --down: #b42318;
  --ok: #157a42; --warn: #8f5600; --bad: #b42318; --focus: #1f5fbf;
  --ok-bg: #edf7f1; --warn-bg: #fff6e5; --bad-bg: #fdf0ef;
  --radius: 8px; --gap: 16px; --maxw: 1200px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141b; --surface: #171d26; --fg: #e4e8ee; --muted: #9aa5b4; --line: #2b3441;
    --accent: #6ea8ff; --accent-fg: #0b1220; --up: #4cc38a; --down: #ff7b72;
    --ok: #4cc38a; --warn: #e3a541; --bad: #ff7b72; --focus: #6ea8ff;
    --ok-bg: #12261c; --warn-bg: #2a2111; --bad-bg: #2c1615;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; display: flex; flex-direction: column;
  font: 15px/1.5 var(--font); background: var(--bg); color: var(--fg);
}
a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
h1 { font-size: 1.45rem; line-height: 1.25; margin: 0 0 0.75rem; }
h2 { font-size: 1.1rem; margin: 0 0 0.5rem; }
p { margin: 0 0 0.75rem; }
code { font: 0.9em/1.4 var(--mono); overflow-wrap: anywhere; }
.skip { position: absolute; left: -9999px; top: 0; }
.skip:focus { left: 8px; top: 8px; z-index: 10; padding: 6px 10px; background: var(--surface); border-radius: var(--radius); }

/* header and footer */
.top {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; padding: 10px var(--gap);
  background: var(--surface); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; font-size: 1.05rem; color: var(--fg); text-decoration: none; }
.brand-sub { font-weight: 400; color: var(--muted); }
.nav { display: flex; flex-wrap: wrap; gap: 4px 14px; }
.nav a { color: var(--fg); text-decoration: none; padding: 2px 0; }
.nav a:hover { color: var(--accent); }
.nav a.on { color: var(--accent); font-weight: 600; box-shadow: inset 0 -2px 0 var(--accent); }
.who { margin-left: auto; display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 0.875rem; min-width: 0; }
.who-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 22ch; }
form.logout { display: inline; margin: 0; }
main { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 20px var(--gap); flex: 1 0 auto; }
.foot { max-width: var(--maxw); width: 100%; margin: 0 auto; padding: 8px var(--gap) 20px; color: var(--muted); font-size: 0.8rem; }

/* text helpers */
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.nowrap { white-space: nowrap; }
.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.up { color: var(--up); }
.down { color: var(--down); }

/* cards and tables */
.panel, .card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin: 0 0 var(--gap); }
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; }
th, td { padding: 6px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { font-size: 0.8rem; font-weight: 600; color: var(--muted); }
.badge {
  display: inline-block; padding: 1px 7px; border: 1px solid var(--line); border-radius: 999px;
  font-size: 0.75rem; font-weight: 600; color: var(--muted); white-space: nowrap; vertical-align: middle;
}

/* forms and buttons */
input, select, textarea, button { font: inherit; color: inherit; }
input:not([type=checkbox]):not([type=radio]):not([type=hidden]), select, textarea {
  max-width: 100%; padding: 7px 10px; background: var(--surface); color: var(--fg);
  border: 1px solid var(--line); border-radius: 6px;
}
button, .btn {
  display: inline-block; padding: 7px 14px; border: 1px solid var(--accent); border-radius: 6px;
  background: var(--accent); color: var(--accent-fg); cursor: pointer; text-decoration: none; line-height: 1.4;
}
button:hover, .btn:hover { filter: brightness(1.08); }
button.link { background: none; border: 0; padding: 0; color: var(--accent); font-size: inherit; text-decoration: underline; text-underline-offset: 2px; }
button.link:hover { filter: none; text-decoration-thickness: 2px; }

/* notices */
.flash { padding: 8px 12px; border-radius: 6px; border: 1px solid var(--line); background: var(--surface); }
.flash.ok { color: var(--ok); background: var(--ok-bg); border-color: color-mix(in srgb, var(--ok) 40%, transparent); }
.flash.warn { color: var(--warn); background: var(--warn-bg); border-color: color-mix(in srgb, var(--warn) 40%, transparent); }
.flash.bad { color: var(--bad); background: var(--bad-bg); border-color: color-mix(in srgb, var(--bad) 40%, transparent); }

/* sign-in, setup and error pages */
.auth-box, .error-page {
  max-width: 440px; margin: 32px auto; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px 24px;
}
.error-page { max-width: 600px; }
.error-code { margin: 0; font-size: 0.85rem; font-weight: 700; color: var(--muted); letter-spacing: 0.05em; }
.stack-form { display: flex; flex-direction: column; gap: 12px; margin: 0 0 12px; }
.stack-form label { display: flex; flex-direction: column; gap: 4px; font-size: 0.9rem; color: var(--muted); }
.stack-form input:not([type=hidden]) { width: 100%; padding: 9px 11px; font-size: 1rem; color: var(--fg); }
.stack-form .btn, .stack-form button { align-self: flex-start; padding: 9px 18px; }

.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--gap); }

/* one column under 768 px; bigger touch targets */
@media (max-width: 767px) {
  :root { --gap: 16px; }
  main { padding: 14px var(--gap); }
  .top { padding: 8px var(--gap); }
  .who { margin-left: 0; width: 100%; justify-content: space-between; }
  .who-name { max-width: 60vw; }
  .auth-box, .error-page { margin: 12px auto; padding: 18px 16px; }
  .stack-form .btn, .stack-form button { align-self: stretch; padding: 11px 18px; }
  button.link { padding: 6px 0; }
  .grid-2 { grid-template-columns: 1fr; }
}