/* Pearl Hedge — storm-chart trading desk theme.
 * Deep teal storm sky, chartreuse candlesticks, ticker-tape chrome.
 * Pearl dark-luminous family, its own personality. */
:root {
  --storm-0: #041417;
  --storm-1: #062226;
  --storm-2: #0a3038;
  --storm-3: #0e3d47;
  --chartreuse: #c8f542;
  --chartreuse-dim: #9dc22e;
  --chartreuse-glow: rgba(200, 245, 66, 0.16);
  --bear: #ff5d5d;
  --ink: #e9f5ee;
  --ink-dim: #9db8b0;
  --ink-faint: #a6b6b1;
  --line: #14424b;
  --panel: rgba(10, 48, 56, 0.72);
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background:
    radial-gradient(1200px 500px at 15% -5%, rgba(200, 245, 66, 0.06), transparent 60%),
    radial-gradient(900px 600px at 90% 10%, rgba(14, 61, 71, 0.9), transparent 55%),
    linear-gradient(180deg, var(--storm-0), var(--storm-1) 40%, var(--storm-0));
  color: var(--ink);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  min-height: 100vh;
}
h1, h2, h3, h4 { letter-spacing: 0.01em; }
h2 { color: var(--chartreuse); font-size: 1.35rem; margin: 0 0 0.5rem; }
h3 { color: var(--ink); font-size: 1.05rem; margin: 1.4rem 0 0.5rem; }
h4 { color: var(--ink-dim); font-size: 0.9rem; margin: 1rem 0 0.4rem; text-transform: uppercase; letter-spacing: 0.08em; }
.lede { color: var(--ink-dim); max-width: 70ch; }
.lede strong { color: var(--ink); }
.mono, code { font-family: var(--mono); }
a { color: var(--chartreuse); }

/* top bar */
.topbar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(6, 34, 38, 0.95), rgba(4, 20, 23, 0.9));
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(6px);
}
.brand { display: flex; align-items: center; gap: 0.9rem; }
.brand h1 { margin: 0; font-size: 1.6rem; color: var(--chartreuse); text-shadow: 0 0 18px var(--chartreuse-glow); }
.tagline { margin: 0.15rem 0 0; color: var(--ink-dim); font-size: 0.85rem; }
.seal { width: 64px; height: 40px; }
.seal .c-up { fill: var(--chartreuse); opacity: 0.9; }
.seal .c-down { fill: var(--bear); opacity: 0.85; }
.seal .wick { stroke: var(--ink-dim); stroke-width: 1.4; }
.seal .trend { stroke: var(--chartreuse); stroke-width: 2; opacity: 0.9; filter: drop-shadow(0 0 4px var(--chartreuse)); }

/* ticker tape */
.ticker { overflow: hidden; border-bottom: 1px solid var(--line); background: rgba(4, 20, 23, 0.8); }
.ticker-inner {
  display: inline-block; white-space: nowrap; padding: 0.35rem 0;
  font-family: var(--mono); font-size: 0.78rem; color: var(--ink-dim);
  animation: tape 60s linear infinite;
}
.ticker-inner b.up { color: var(--chartreuse); }
.ticker-inner b.down { color: var(--bear); }
@keyframes tape { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* step nav */
.steps { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.steps button {
  background: transparent; color: var(--ink-dim); border: 1px solid var(--line);
  border-radius: 6px; padding: 0.5rem 0.85rem; font-size: 0.85rem; cursor: pointer;
  font-family: var(--mono);
}
.steps button:hover { border-color: var(--chartreuse-dim); color: var(--ink); }
.steps button.active {
  background: var(--chartreuse-glow); color: var(--chartreuse);
  border-color: var(--chartreuse-dim);
  box-shadow: 0 0 12px rgba(200, 245, 66, 0.25);
}

/* panels */
main { max-width: 1020px; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
.panel {
  display: none; background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; padding: 1.5rem; margin-bottom: 1.25rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
}
.panel.active { display: block; }
.panel.limits { display: block; border-color: var(--chartreuse-dim); }
.limits h2 { color: var(--chartreuse); }
.limits li { margin-bottom: 0.5rem; color: var(--ink-dim); }
.limits li strong { color: var(--ink); }

/* forms */
.form-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; margin: 1rem 0;
}
.form-grid label.wide { grid-column: 1 / -1; }
/* grid items must be allowed to shrink below content min-width, or a long
   <select> option (e.g. the put description) forces the track wider than a
   phone viewport */
.form-grid > * { min-width: 0; }
input, select, textarea { min-width: 0; max-width: 100%; }
label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.88rem; color: var(--ink-dim); }
input, select, textarea {
  background: var(--storm-0); border: 1px solid var(--line); color: var(--ink);
  border-radius: 6px; padding: 0.55rem 0.7rem; font-size: 0.92rem; font-family: inherit;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--chartreuse-dim);
  box-shadow: 0 0 0 2px var(--chartreuse-glow);
}
input[type="password"] { font-family: var(--mono); }
label.check { flex-direction: row; align-items: flex-start; gap: .6rem; border: 1px solid var(--line); border-radius: 8px; padding: .7rem .8rem; color: var(--ink); line-height: 1.5; cursor: pointer; }
label.check input { width: auto; margin-top: .15rem; }
label.check code { word-break: break-all; }
textarea { font-family: var(--mono); font-size: 0.82rem; resize: vertical; }
.hint { color: var(--ink-faint); font-size: 0.82rem; }
.hint-inline { color: var(--ink-faint); font-size: 0.78rem; }
.row { display: flex; gap: 0.6rem; flex-wrap: wrap; align-items: center; margin: 0.8rem 0; }
button {
  font-family: inherit; font-size: 0.9rem; border-radius: 6px; cursor: pointer;
  padding: 0.55rem 1rem; border: 1px solid var(--line);
  background: var(--storm-2); color: var(--ink);
}
button:hover { border-color: var(--chartreuse-dim); }
button.primary {
  background: var(--chartreuse); color: #0a1a05; border-color: var(--chartreuse);
  font-weight: 700; box-shadow: 0 0 16px rgba(200, 245, 66, 0.35);
}
button.primary:hover { background: #d8ff5e; }
button.ghost { background: transparent; color: var(--ink-dim); }
button.copy-btn { font-size: 0.78rem; padding: 0.35rem 0.7rem; }
button:disabled { opacity: 0.45; cursor: not-allowed; }
.err {
  background: rgba(255, 93, 93, 0.1); border: 1px solid rgba(255, 93, 93, 0.5);
  color: #ffb3b3; border-radius: 6px; padding: 0.7rem 0.9rem; font-size: 0.88rem;
}
.ok {
  background: rgba(200, 245, 66, 0.08); border: 1px solid var(--chartreuse-dim);
  color: var(--chartreuse); border-radius: 6px; padding: 0.7rem 0.9rem; font-size: 0.88rem;
}
.note {
  background: rgba(200, 245, 66, 0.05); border: 1px dashed var(--chartreuse-dim);
  border-radius: 6px; padding: 0.8rem 1rem; margin: 0.8rem 0; font-size: 0.88rem; color: var(--ink-dim);
}
.note code { word-break: break-all; color: var(--chartreuse); }
.addr code { word-break: break-all; color: var(--chartreuse); font-size: 0.95rem; }

/* review tables */
.review { display: grid; grid-template-columns: auto 1fr; gap: 0.35rem 1rem; margin: 0.8rem 0; }
.review dt { color: var(--ink-faint); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; }
.review dd { margin: 0; font-family: var(--mono); font-size: 0.85rem; word-break: break-all; color: var(--ink); }
.asm {
  background: var(--storm-0); border: 1px solid var(--line); border-radius: 6px;
  padding: 0.7rem 0.9rem; font-family: var(--mono); font-size: 0.8rem;
  color: var(--chartreuse); overflow-x: auto; white-space: pre-wrap; word-break: break-all;
}
.qr { margin: 1rem 0; }
.qr canvas, .qr img { border: 6px solid #fff; border-radius: 6px; }

/* exercise columns */
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; margin-top: 1rem; }
.col { border: 1px solid var(--line); border-radius: 8px; padding: 1rem; background: rgba(4, 20, 23, 0.5); }
.col h3 { margin-top: 0; }
@media (max-width: 760px) { .cols, .form-grid { grid-template-columns: 1fr; } }

/* countdown + verdict */
.countdown {
  font-family: var(--mono); font-size: 1.05rem; color: var(--chartreuse);
  border: 1px solid var(--chartreuse-dim); border-radius: 8px;
  padding: 0.9rem 1.1rem; margin-top: 1rem; background: var(--chartreuse-glow);
}
.verdict {
  font-size: 1.4rem; font-weight: 800; font-family: var(--mono);
  padding: 1rem; border-radius: 8px; text-align: center; margin-bottom: 1rem;
}
.verdict.proven { color: var(--chartreuse); border: 2px solid var(--chartreuse-dim); background: var(--chartreuse-glow); }
.verdict.notproven { color: #ffb3b3; border: 2px solid rgba(255, 93, 93, 0.6); background: rgba(255, 93, 93, 0.08); }

/* footer */
footer {
  border-top: 1px solid var(--line); padding: 1.5rem; text-align: center;
  color: var(--ink-faint); font-size: 0.85rem;
}
footer code { color: var(--chartreuse); word-break: break-all; }

/* Keyboard focus: a visible ring in this app's accent on every interactive element (fleet focus-visible pass). */
:focus-visible { outline: 2px solid var(--chartreuse); outline-offset: 2px; }

/* Skip link: the first Tab stop on the page — parked off-screen until keyboard focus reveals it (fleet skip-link pass). */
.skip-link { position: absolute; left: 12px; top: -64px; z-index: 1000; padding: 10px 16px; border: 2px solid var(--chartreuse); border-radius: 8px; background: #0b0e14; color: var(--chartreuse); font-weight: 700; text-decoration: none; transition: top .15s ease; }
.skip-link:focus-visible { top: 12px; }
main:focus { outline: none; }

/* Reduced motion: when the OS asks for reduced motion, animations and transitions finish near-instantly and scrolling is not smoothed (fleet reduced-motion pass). Near-zero durations — not animation: none — so fade-ins still land on their end state and no content can be stranded invisible. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}