/* account.css — accounts and the course spine.
   Self-contained: it reads base.css tokens but declares its own components, so the
   landing-page rework cannot break the login and the login cannot break it. Every
   token is read with a fallback for the same reason.

   Materiality: matte panels lit from above, one hairline, one shadow, and coral used
   exactly where an action is. Coral is the colour of a real flight recorder. */

:root {
  --ac-coral: var(--coral, #FF5F3E);
  --ac-on-coral: var(--coral-on, #180702);
  --ac-max: 1180px;
}
:root[data-theme="dark"]  { --ac-accent-text: var(--coral, #FF5F3E); --ac-coral-soft: rgba(255, 95, 62, .12); --ac-coral-line: rgba(255, 95, 62, .34); }
:root[data-theme="light"] { --ac-accent-text: var(--coral-ink, #C93C14); --ac-coral-soft: rgba(255, 95, 62, .10); --ac-coral-line: rgba(201, 60, 20, .30); }

/* ---------------------------------------------------------------- shell */
.ac-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(120% 80% at 50% -10%, color-mix(in srgb, var(--bg-2, #101318) 70%, transparent) 0%, transparent 60%),
    var(--bg, #07080a);
}

.ac-top {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: var(--s4, 16px);
  padding: var(--s3, 12px) var(--s5, 24px);
  border-bottom: 1px solid var(--line, #23282f);
  background: var(--glass, rgba(11, 13, 16, .82));
  backdrop-filter: saturate(140%) blur(10px);
}
.ac-brand { display: flex; align-items: center; gap: var(--s3, 12px); text-decoration: none; color: var(--ink, #e9edf1); }
.ac-brand svg { width: 148px; height: auto; }
.ac-brand svg .ac.ko { fill: var(--ac-accent-text); }
.ac-brand:hover { opacity: .86; }
.ac-brand .ac-badge-mark { display: none; width: 30px; height: 30px; }
.ac-top-right { margin-left: auto; display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: var(--s3, 12px); min-width: 0; }

.ac-icon {
  width: 32px; height: 32px; display: grid; place-items: center;
  border: 1px solid var(--line, #23282f); border-radius: var(--r, 7px);
  color: var(--ink-2, #a4b0bc); background: var(--bg-2, #101318);
  transition: color var(--dur-fast, 120ms) var(--ease, ease), border-color var(--dur-fast, 120ms) var(--ease, ease);
}
.ac-icon:hover { color: var(--ink, #e9edf1); border-color: var(--line-2, #2e343d); }

.ac-who {
  font-family: var(--font-mono, monospace);
  font-size: var(--text-xs, 11px); color: var(--ink-3, #6b7885);
  max-width: 46ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.ac-link {
  font-family: var(--font-mono, monospace); font-size: var(--text-xs, 11px);
  letter-spacing: .06em; text-transform: uppercase; color: var(--ink-2, #a4b0bc);
  text-decoration: none; border-bottom: 1px solid transparent;
}
.ac-link:hover { color: var(--ink, #e9edf1); border-bottom-color: var(--ac-coral-line); }

.ac-main { flex: 1; width: 100%; max-width: var(--ac-max); margin: 0 auto; padding: var(--s7, 48px) var(--s5, 24px) var(--s9, 96px); }
.ac-foot {
  border-top: 1px solid var(--line, #23282f); padding: var(--s5, 24px);
  font-family: var(--font-mono, monospace); font-size: var(--text-xs, 11px); color: var(--ink-4, #47525d);
  text-align: center;
}

/* ---------------------------------------------------------------- primitives */
.ac-eyebrow {
  font-family: var(--font-mono, monospace); font-size: 11px; font-weight: 600;
  letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3, #6b7885);
}
.ac-eyebrow.hot { color: var(--ac-accent-text); }

.ac-panel {
  border: 1px solid var(--line, #23282f); border-radius: var(--r-lg, 12px);
  background: var(--panel-grad, linear-gradient(180deg, #12161b, #0c0f13));
}

.ac-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--font-mono, monospace); font-size: var(--text-sm, 13px); font-weight: 600;
  letter-spacing: .04em; padding: 11px 18px;
  border: 1px solid var(--line-2, #2e343d); border-radius: var(--r, 7px);
  background: var(--bg-3, #171b21); color: var(--ink, #e9edf1);
  text-decoration: none; cursor: pointer;
  transition: background var(--dur-fast, 120ms) var(--ease, ease), border-color var(--dur-fast, 120ms) var(--ease, ease), transform var(--dur-fast, 120ms) var(--ease, ease);
}
.ac-btn:hover { background: var(--bg-4, #1f242c); }
.ac-btn:active { transform: translateY(1px); }
.ac-btn[disabled], .ac-btn[aria-disabled="true"] { opacity: .45; cursor: not-allowed; transform: none; }

.ac-btn.coral {
  background: var(--ac-coral); border-color: var(--ac-coral); color: var(--ac-on-coral);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .22) inset;
}
.ac-btn.coral:hover { filter: brightness(1.06); background: var(--ac-coral); }
.ac-btn.ghost { background: transparent; color: var(--ink-2, #a4b0bc); }
.ac-btn.ghost:hover { color: var(--ink, #e9edf1); background: var(--bg-2, #101318); }
.ac-btn.big { font-size: var(--text-md, 17px); padding: 15px 26px; letter-spacing: .01em; }
.ac-btn.wide { width: 100%; }

.ac-spin {
  width: 14px; height: 14px; flex: none;
  border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%;
  animation: ac-rot .6s linear infinite; display: none;
}
.ac-btn.loading .ac-spin { display: block; }
@keyframes ac-rot { to { transform: rotate(360deg); } }

/* ---------------------------------------------------------------- account page */
.ac-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  grid-template-areas: "hero form" "facts form";
  grid-template-rows: auto 1fr;
  column-gap: var(--s8, 64px); row-gap: var(--s6, 32px); align-items: start;
}
.ac-grid > .ac-hero { grid-area: hero; }
.ac-grid > .ac-facts-wrap { grid-area: facts; }
.ac-grid > .ac-card { grid-area: form; }
.ac-hero h1 {
  font-size: clamp(2.1rem, 4.6vw, 3.2rem); line-height: 1.03; letter-spacing: -.035em;
  margin: var(--s4, 16px) 0 var(--s4, 16px);
}
.ac-hero h1 em { font-style: normal; color: var(--ac-accent-text); }
.ac-lede { color: var(--ink-2, #a4b0bc); font-size: var(--text-md, 17px); max-width: 52ch; }

.ac-facts { list-style: none; padding: 0; margin: var(--s6, 32px) 0 0; display: grid; gap: var(--s3, 12px); }
.ac-facts li { display: grid; grid-template-columns: 62px 1fr; gap: var(--s4, 16px); align-items: baseline; }
.ac-facts b {
  font-family: var(--font-mono, monospace); font-size: var(--text-lg, 22px); font-weight: 700;
  color: var(--ink, #e9edf1); font-variant-numeric: tabular-nums; text-align: right;
}
.ac-facts span { color: var(--ink-3, #6b7885); font-size: var(--text-sm, 13px); }

.ac-card { padding: var(--s6, 32px); }
.ac-tabs {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 4px;
  background: var(--bg-2, #101318); border: 1px solid var(--line, #23282f);
  border-radius: var(--r, 7px); margin-bottom: var(--s5, 24px);
}
.ac-tab {
  font-family: var(--font-mono, monospace); font-size: var(--text-xs, 11px); font-weight: 600;
  letter-spacing: .04em; padding: 9px 8px;
  border-radius: var(--r-sm, 4px); color: var(--ink-3, #6b7885); background: transparent;
}
.ac-tab[aria-selected="true"] { background: var(--bg-4, #1f242c); color: var(--ink, #e9edf1); box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05); }

.ac-field { display: grid; gap: 6px; margin-bottom: var(--s4, 16px); }
.ac-field label {
  font-family: var(--font-mono, monospace); font-size: var(--text-sm, 13px); font-weight: 500;
  letter-spacing: 0; color: var(--ink-2, #a4b0bc);
}
.ac-field input {
  width: 100%; padding: 12px 13px;
  border: 1px solid var(--line-2, #2e343d); border-radius: var(--r, 7px);
  background: var(--bg, #07080a); color: var(--ink, #e9edf1);
  font-size: var(--text-base, 15px);
  transition: border-color var(--dur-fast, 120ms) var(--ease, ease), box-shadow var(--dur-fast, 120ms) var(--ease, ease);
}
.ac-field input::placeholder { color: var(--ink-4, #47525d); }
.ac-field input:focus {
  outline: none; border-color: var(--ac-coral);
  outline: 2px solid var(--ac-coral); outline-offset: 1px;
}
.ac-field input[aria-invalid="true"] { border-color: var(--crit, #ff4d4d); }
.ac-hint { font-size: var(--text-xs, 11px); color: var(--ink-4, #47525d); }
.ac-fielderr { font-size: var(--text-xs, 11px); color: var(--crit, #ff4d4d); min-height: 14px; }

.ac-alert {
  display: none; gap: 10px; align-items: flex-start;
  padding: 11px 13px; margin-bottom: var(--s4, 16px);
  border: 1px solid var(--crit, #ff4d4d); border-radius: var(--r, 7px);
  background: color-mix(in srgb, var(--crit, #ff4d4d) 12%, transparent);
  color: var(--ink, #e9edf1); font-size: var(--text-sm, 13px);
}
.ac-alert.on { display: flex; }
.ac-alert.ok { border-color: var(--phos, #3ddc84); background: color-mix(in srgb, var(--phos, #3ddc84) 12%, transparent); }
.ac-alert b { font-family: var(--font-mono, monospace); font-size: var(--text-xs, 11px); letter-spacing: .1em; text-transform: uppercase; }

.ac-small { font-size: var(--text-xs, 11px); color: var(--ink-4, #47525d); margin-top: var(--s4, 16px); line-height: 1.6; }
.ac-small a { color: var(--ink-2, #a4b0bc); }

/* ---------------------------------------------------------------- course page */
.co-strip {
  display: flex; flex-wrap: wrap; gap: var(--s2, 8px) var(--s5, 24px); align-items: center;
  font-family: var(--font-mono, monospace); font-size: var(--text-xs, 11px);
  color: var(--ink-3, #6b7885); margin-bottom: var(--s4, 16px);
}
.co-strip b { color: var(--ink, #e9edf1); font-weight: 600; }
.co-strip .sep { color: var(--ink-4, #47525d); }

.co-now {
  position: relative; overflow: hidden;
  padding: var(--s7, 48px); border-radius: var(--r-xl, 18px);
  border: 1px solid var(--ac-coral-line);
  background:
    radial-gradient(90% 120% at 100% 0%, var(--ac-coral-soft) 0%, transparent 55%),
    var(--panel-grad, linear-gradient(180deg, #12161b, #0c0f13));
}
.co-now h1 {
  font-size: clamp(1.9rem, 4vw, 2.9rem); line-height: 1.05; letter-spacing: -.03em;
  margin: var(--s3, 12px) 0 var(--s4, 16px); text-wrap: balance;
}
.co-why { font-size: var(--text-md, 17px); color: var(--ink-2, #a4b0bc); max-width: 62ch; }
.co-cue {
  margin: var(--s5, 24px) 0 0; padding: var(--s4, 16px) var(--s5, 24px);
  border: 1px solid var(--line, #23282f); background: var(--bg-2, #101318);
  border-radius: var(--r, 7px);
}
.co-cue .ac-eyebrow { display: block; margin-bottom: 6px; }
.co-cue p { font-family: var(--font-mono, monospace); font-size: var(--text-sm, 13px); color: var(--ink, #e9edf1); }

.co-teaches { list-style: none; padding: 0; margin: var(--s5, 24px) 0 0; display: grid; gap: 8px; }
.co-teaches li {
  display: grid; grid-template-columns: 16px 1fr; gap: 10px; align-items: start;
  font-size: var(--text-sm, 13px); color: var(--ink-2, #a4b0bc);
}
.co-teaches li::before { content: "→"; color: var(--ac-accent-text); font-family: var(--font-mono, monospace); }
.co-teaches b { color: var(--ink, #e9edf1); font-weight: 600; }

.co-actions { display: flex; flex-wrap: wrap; gap: var(--s3, 12px); margin-top: var(--s6, 32px); align-items: center; }

.co-sec-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--s4, 16px);
  margin: var(--s9, 96px) 0 var(--s5, 24px); padding-bottom: var(--s3, 12px);
  border-bottom: 1px solid var(--line, #23282f);
}
.co-sec-head h2 { font-size: var(--text-lg, 22px); }
.co-sec-head p { font-size: var(--text-sm, 13px); color: var(--ink-3, #6b7885); max-width: 46ch; }

.co-ladder { display: grid; gap: var(--s3, 12px); }
.co-stage {
  display: grid; grid-template-columns: 34px minmax(0, 1fr) 132px; gap: var(--s4, 16px);
  align-items: start; padding: var(--s5, 24px);
  border: 1px solid var(--line, #23282f); border-radius: var(--r-lg, 12px);
  background: var(--bg-1, #0b0d10);
}
.co-stage.is-current { border-color: var(--ac-coral-line); background: var(--panel-grad, #0c0f13); }
.co-stage.is-complete .co-num { color: var(--phos, #3ddc84); border-color: var(--phos-dim, #1f7a4a); }
.co-num {
  width: 34px; height: 34px; display: grid; place-items: center;
  border: 1px solid var(--line-2, #2e343d); border-radius: 50%;
  font-family: var(--font-mono, monospace); font-size: var(--text-xs, 11px); font-weight: 700;
  color: var(--ink-3, #6b7885);
}
.co-stage.is-current .co-num { color: var(--ac-accent-text); border-color: var(--ac-coral); }
.co-stage h3 { font-size: var(--text-md, 17px); margin-bottom: 4px; }
.co-stage .co-aim { font-size: var(--text-sm, 13px); color: var(--ink-2, #a4b0bc); max-width: 62ch; }
.co-stage .co-meta {
  font-family: var(--font-mono, monospace); font-size: 11px; letter-spacing: .1em;
  color: var(--ink-4, #47525d); margin-top: 10px;
}
.co-side { display: grid; gap: 8px; justify-items: stretch; }
.co-badge {
  font-family: var(--font-mono, monospace); font-size: 11px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; text-align: center;
  padding: 5px 8px; border-radius: 99px; border: 1px solid var(--line-2, #2e343d);
  color: var(--ink-3, #6b7885);
}
.co-badge.done { color: var(--phos, #3ddc84); border-color: var(--phos-dim, #1f7a4a); }
.co-badge.now { color: var(--ac-on-coral); background: var(--ac-coral); border-color: var(--ac-coral); }

.co-bar { height: 6px; border-radius: 99px; background: var(--bg-3, #171b21); overflow: hidden; }
.co-bar i { display: block; height: 100%; border-radius: 99px; background: var(--ac-coral); }
.co-stage.is-complete .co-bar i { background: var(--phos, #3ddc84); }
.co-pct {
  font-family: var(--font-mono, monospace); font-size: var(--text-xs, 11px);
  color: var(--ink-3, #6b7885); text-align: right; font-variant-numeric: tabular-nums;
}

.co-cols { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: var(--s5, 24px); align-items: start; }
.co-block { padding: var(--s5, 24px); }
.co-block h3 { margin-bottom: var(--s3, 12px); }
.co-kv { display: grid; gap: 10px; margin-top: var(--s4, 16px); }
.co-kv div { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s4, 16px); border-bottom: 1px dashed var(--line, #23282f); padding-bottom: 8px; }
.co-kv span { font-size: var(--text-sm, 13px); color: var(--ink-3, #6b7885); }
.co-kv b { font-family: var(--font-mono, monospace); font-size: var(--text-sm, 13px); color: var(--ink, #e9edf1); font-variant-numeric: tabular-nums; }

.co-skills { display: grid; grid-template-columns: repeat(auto-fill, minmax(238px, 1fr)); gap: var(--s3, 12px); }
.co-skill {
  padding: var(--s4, 16px); border: 1px solid var(--line, #23282f);
  border-radius: var(--r, 7px); background: var(--bg-1, #0b0d10);
}
.co-skill .top { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s3, 12px); margin-bottom: 4px; }
.co-skill h4 { font-size: var(--text-sm, 13px); font-weight: 600; }
.co-skill .lvl { font-family: var(--font-mono, monospace); font-size: var(--text-sm, 13px); color: var(--ink, #e9edf1); font-variant-numeric: tabular-nums; }
.co-skill .lvl.none { color: var(--ink-4, #47525d); }
.co-skill p { font-size: var(--text-xs, 11px); color: var(--ink-3, #6b7885); margin: 8px 0 10px; }

.co-gate {
  max-width: 520px; margin: var(--s8, 64px) auto; padding: var(--s7, 48px);
  text-align: center;
}
.co-gate h1 { font-size: var(--text-xl, 30px); margin-bottom: var(--s3, 12px); }
.co-gate p { color: var(--ink-2, #a4b0bc); margin-bottom: var(--s5, 24px); }
.co-gate .ac-btn { margin-bottom: var(--s3, 12px); }

.ac-banner {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--s3, 12px);
  padding: 11px var(--s4, 16px); margin-bottom: var(--s6, 32px);
  border: 1px solid var(--amber-dim, #8a5f10); border-radius: var(--r, 7px);
  background: color-mix(in srgb, var(--amber, #ffb020) 10%, transparent);
  font-size: var(--text-sm, 13px); color: var(--ink, #e9edf1);
}
.ac-banner .ac-btn { margin-left: auto; }

.ac-skeleton { color: var(--ink-4, #47525d); font-family: var(--font-mono, monospace); font-size: var(--text-sm, 13px); }
[hidden] { display: none !important; }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 900px) {
  .ac-grid, .co-cols { grid-template-columns: minmax(0, 1fr); gap: var(--s6, 32px); }
  .ac-main { padding: var(--s6, 32px) var(--s4, 16px) var(--s8, 64px); }
  .co-now { padding: var(--s5, 24px); border-radius: var(--r-lg, 12px); }
  .co-sec-head { margin-top: var(--s7, 48px); flex-direction: column; }
  .co-stage { grid-template-columns: 28px minmax(0, 1fr); }
  .co-num { width: 28px; height: 28px; }
  .co-side { grid-column: 1 / -1; grid-template-columns: auto 1fr auto; align-items: center; gap: var(--s3, 12px); }
  .ac-top { padding: var(--s3, 12px) var(--s4, 16px); flex-wrap: wrap; }
  /* the signed-in address is the first thing to go: it is confirmation, not navigation */
  .ac-who { display: none; }
  .ac-brand svg { width: 146px; }
  .ac-who { max-width: 100%; }
  .ac-card { padding: var(--s5, 24px); }
  /* one column, and the form jumps ahead of the supporting numbers */
  .ac-grid { grid-template-columns: 1fr; grid-template-areas: "hero" "form" "facts"; grid-template-rows: auto auto auto; }
  .co-actions .ac-btn { width: 100%; }
}
@media (max-width: 360px) {
  .ac-brand svg { display: none; }
  .ac-brand .ac-badge-mark { display: block; }
}

/* ---------------------------------------------------------------- labels after the fact
   Labels live below or inside the thing they describe, never as a tracked chip above a
   heading. The heading carries the weight; these carry the metadata. */
.ac-optional { color: var(--ink-4, #47525d); font-weight: 400; }
.co-nowline {
  font-family: var(--font-mono, monospace); font-size: var(--text-sm, 13px);
  color: var(--ink-3, #6b7885); margin: 0 0 var(--s4, 16px);
}
.co-nowline b { color: var(--ac-accent-text); font-weight: 600; }
.co-cue-label {
  display: block; margin-bottom: 6px;
  font-family: var(--font-mono, monospace); font-size: var(--text-xs, 11px);
  color: var(--ink-3, #6b7885);
}
.co-block h3 { font-size: var(--text-lg, 21px); line-height: 1.15; letter-spacing: -.02em; }
.co-block h3 span.big { display: block; font-size: clamp(1.6rem, 3vw, 2.1rem); }