/* Shared shell for the masterclass student tools.
   Dark amber palette lifted from the decks so the tools feel like the session. */

:root {
  --bg: #0b0a09;
  --panel: #16130f;
  --panel-2: #1d1915;
  --line: #322a22;
  --ink: #f4efe9;
  --dim: #a89b8c;
  --faint: #6f6355;
  --orange: #fc8902;
  --green: #3fbf7f;
  --red: #ef5a5a;
  --blue: #4a9fe0;
  --radius: 14px;
  --mono: "SF Mono", "Cascadia Mono", "Roboto Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background:
    radial-gradient(120% 90% at 12% -10%, #2a1c0d 0%, rgba(42, 28, 13, 0) 55%),
    radial-gradient(90% 70% at 100% 108%, #47290a 0%, rgba(71, 41, 10, 0) 60%),
    var(--bg);
  background-attachment: fixed;
  color: var(--ink);
  font: 400 16px/1.55 "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  min-height: 100vh;
}

a { color: var(--orange); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 28px 20px 72px; }

/* ---------------------------------------------------------------- masthead */

header.bar {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.mark {
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--orange);
}

.bar nav { margin-left: auto; display: flex; gap: 6px; flex-wrap: wrap; }

.bar nav a {
  color: var(--dim);
  text-decoration: none;
  font-size: 13px;
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid transparent;
}

.bar nav a:hover { color: var(--ink); border-color: var(--line); }
.bar nav a[aria-current="page"] { color: var(--ink); border-color: var(--orange); }

h1 {
  font-size: clamp(26px, 4.2vw, 40px);
  line-height: 1.12;
  margin: 30px 0 10px;
  letter-spacing: -0.02em;
}

.lede { color: var(--dim); max-width: 68ch; margin: 0 0 26px; font-size: 17px; }

h2 {
  font-size: 13px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--orange);
  margin: 0 0 14px;
}

h3 { font-size: 17px; margin: 0 0 8px; }

/* ------------------------------------------------------------------ layout */

.grid { display: grid; gap: 18px; }
.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 22px; align-items: start; }

@media (max-width: 860px) {
  .cols-2, .cols-3, .split { grid-template-columns: minmax(0, 1fr); }
}

.card {
  background: linear-gradient(160deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.card.tight { padding: 16px 18px; }

/* ------------------------------------------------------------------ inputs */

.field { margin-bottom: 16px; }

.field label {
  display: block;
  font-size: 13px;
  color: var(--dim);
  margin-bottom: 6px;
}

.field .hint { display: block; color: var(--faint); font-size: 12px; margin-top: 5px; }

.inputwrap { position: relative; display: flex; align-items: center; }

.inputwrap .pre,
.inputwrap .post {
  position: absolute;
  color: var(--faint);
  font-size: 14px;
  pointer-events: none;
}

.inputwrap .pre { left: 13px; }
.inputwrap .post { right: 13px; }
.inputwrap.has-pre input { padding-left: 30px; }
.inputwrap.has-post input { padding-right: 40px; }

input[type="number"], input[type="text"], select {
  width: 100%;
  background: #100d0a;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--ink);
  font: 600 17px/1 var(--mono);
  padding: 12px 13px;
  outline: none;
}

input:focus, select:focus { border-color: var(--orange); }

input[type="range"] { width: 100%; accent-color: var(--orange); }

/* ----------------------------------------------------------------- results */

.readout {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line);
}

.readout:last-child { border-bottom: 0; }
.readout .k { color: var(--dim); font-size: 14px; }
.readout .v { font: 700 19px/1 var(--mono); }

.hero {
  text-align: center;
  padding: 26px 18px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #100d0a;
}

.hero .big { font: 700 clamp(34px, 7vw, 52px)/1 var(--mono); letter-spacing: -0.02em; }
.hero .cap { color: var(--dim); font-size: 13px; margin-top: 9px; }

.good { color: var(--green); }
.bad { color: var(--red); }
.warn { color: var(--orange); }
.info { color: var(--blue); }

.verdict {
  border-radius: var(--radius);
  padding: 18px 20px;
  border: 1px solid var(--line);
  font-size: 16px;
}

.verdict.ok { border-color: rgba(63, 191, 127, 0.5); background: rgba(63, 191, 127, 0.09); }
.verdict.no { border-color: rgba(239, 90, 90, 0.5); background: rgba(239, 90, 90, 0.09); }
.verdict.mid { border-color: rgba(252, 137, 2, 0.5); background: rgba(252, 137, 2, 0.09); }
.verdict strong { display: block; font-size: 19px; margin-bottom: 5px; }

/* -------------------------------------------------------------------- bars */

.bar-row { margin: 13px 0; }
.bar-row .lab { display: flex; justify-content: space-between; font-size: 13px; color: var(--dim); margin-bottom: 5px; }
.track { height: 11px; border-radius: 999px; background: #0d0b09; border: 1px solid var(--line); overflow: hidden; }
.fill { height: 100%; border-radius: 999px; transition: width 0.25s ease; }

/* ----------------------------------------------------------------- buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--orange);
  color: #1a1206;
  border: 0;
  border-radius: 9px;
  font: 600 14px/1 inherit;
  padding: 12px 17px;
  cursor: pointer;
}

.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn.ghost:hover { border-color: var(--orange); }
.btn.sm { padding: 8px 12px; font-size: 13px; }

.btnrow { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }

/* -------------------------------------------------------------------- misc */

.note {
  color: var(--faint);
  font-size: 12.5px;
  line-height: 1.5;
  border-left: 2px solid var(--line);
  padding-left: 12px;
  margin: 18px 0 0;
}

.pill {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--orange);
  border: 1px solid rgba(252, 137, 2, 0.4);
  border-radius: 999px;
  padding: 4px 10px;
}

ul.plain { margin: 0; padding-left: 18px; color: var(--dim); font-size: 14.5px; }
ul.plain li { margin-bottom: 7px; }
ul.plain b { color: var(--ink); font-weight: 600; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--dim); font-weight: 500; font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; }
td.num { font-family: var(--mono); text-align: right; }

footer.legal {
  margin-top: 46px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 12px;
  line-height: 1.6;
}

/* --------------------------------------------------------------- home tiles */

a.tile {
  display: block;
  text-decoration: none;
  color: inherit;
  background: linear-gradient(160deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

a.tile:hover { border-color: var(--orange); transform: translateY(-2px); }
a.tile .n { font: 700 13px/1 var(--mono); color: var(--orange); }
a.tile h3 { margin: 12px 0 7px; font-size: 20px; }
a.tile p { margin: 0; color: var(--dim); font-size: 14.5px; }
a.tile .go { margin-top: 15px; font-size: 13px; color: var(--orange); }

/* ------------------------------------------------------------------- print */

@media print {
  body { background: #fff; color: #000; }
  .bar nav, .btnrow { display: none; }
  .card, .hero, .verdict { border-color: #ccc; background: #fff; }
  .lede, .note, footer.legal, .readout .k { color: #444; }
}