@font-face {
  font-family: "IBM Plex Serif";
  src: url("../fonts/ibm-plex-serif-latin-400-normal.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Serif";
  src: url("../fonts/ibm-plex-serif-latin-600-normal.woff2") format("woff2");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

:root {
  --olive-950: #1f2a1c;
  --olive-800: #34452b;
  --olive-600: #617347;
  --olive-200: #d9dec8;
  --paper: #f7f3e9;
  --paper-deep: #ebe4d4;
  --ink: #24251f;
  --bs-primary: var(--olive-800);
  --bs-primary-rgb: 52, 69, 43;
  --bs-body-font-family: "IBM Plex Serif", Georgia, serif;
  --bs-body-color: var(--ink);
  --bs-body-bg: var(--paper);
  --bs-border-radius: .25rem;
  --bs-border-radius-lg: .35rem;
}

html, body { min-height: 100%; }
body { background: var(--paper); }

.app-frame {
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.app-header,
.app-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .8rem clamp(1rem, 4vw, 2rem);
  border-color: rgba(36, 37, 31, .18);
}
.app-header { border-bottom: 1px solid; }
.app-footer { border-top: 1px solid; }

.brand { color: var(--ink); font-weight: 600; text-decoration: none; }
.language-switch, .meta-label, .eyebrow, .app-footer, .progress-meta, .metric span, .metric small, .status-badge, .session-code {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  text-transform: uppercase;
  letter-spacing: .1em;
}
.language-switch { display: flex; gap: .4rem; font-size: .78rem; }
.language-switch a { color: var(--ink); text-decoration: none; opacity: .55; }
.language-switch a[aria-current="page"] { opacity: 1; text-decoration: underline; text-underline-offset: .25rem; }
.meta-label, .eyebrow { font-size: .72rem; color: var(--olive-600); margin: 0 0 .35rem; }
.app-footer { font-size: .63rem; color: #5e6255; }

.app-main { width: 100%; padding: clamp(1.25rem, 4vw, 3rem); }
.narrow-panel { width: min(100%, 38rem); margin: 0 auto; }
.wide-panel { width: min(100%, 68rem); margin: 0 auto; }
.intro-panel { padding-top: clamp(2rem, 9vh, 6rem); }
h1, h2 { color: var(--olive-950); font-weight: 600; }
h1 { font-size: clamp(2rem, 7vw, 3.6rem); line-height: .98; margin-bottom: 1.2rem; }
h2 { margin-top: 2.5rem; }

.stack-form { display: grid; gap: 1.35rem; margin-top: 2rem; }
.form-control, .form-select { border-color: #8c917f; background-color: rgba(255,255,255,.55); min-height: 3rem; }
.form-control:focus, .form-select:focus, .form-range:focus { border-color: var(--olive-600); box-shadow: 0 0 0 .25rem rgba(97,115,71,.2); }
.form-label, legend { font-weight: 600; }
.code-input { font-family: "IBM Plex Mono", monospace; font-size: 1.5rem; letter-spacing: .18em; text-transform: uppercase; }
.btn { min-height: 2.9rem; font-weight: 600; }
.btn-primary { --bs-btn-bg: var(--olive-800); --bs-btn-border-color: var(--olive-800); --bs-btn-hover-bg: var(--olive-950); --bs-btn-hover-border-color: var(--olive-950); }
.btn-outline-primary { --bs-btn-color: var(--olive-800); --bs-btn-border-color: var(--olive-800); }
.small-link { font-size: .85rem; color: var(--olive-800); }

.choice-grid { display: grid; gap: .65rem; }
.choice-grid.two { grid-template-columns: repeat(2, 1fr); }
.choice-grid.three { grid-template-columns: repeat(3, 1fr); }
.choice-stack { display: grid; gap: .55rem; }
.choice-card {
  display: flex; align-items: center; gap: .65rem; min-height: 3rem;
  padding: .7rem .8rem; border: 1px solid #a4a895; background: rgba(255,255,255,.4); cursor: pointer;
}
.choice-card:has(input:checked) { border-color: var(--olive-800); background: var(--olive-200); }
.choice-card input { inline-size: 1.15rem; block-size: 1.15rem; accent-color: var(--olive-800); flex: 0 0 auto; }

.step-main { min-height: 0; padding: 0; overflow: hidden; }
.step-shell { height: 100%; min-height: 0; display: grid; grid-template-rows: auto 1fr; width: min(100%, 48rem); margin: 0 auto; }
.step-heading { padding: 1.1rem clamp(1rem, 4vw, 2rem) .75rem; }
.step-heading h1 { font-size: clamp(1.9rem, 6vw, 3rem); margin: .8rem 0 .45rem; }
.step-heading p { margin: 0; color: #5e6255; }
.progress-meta { display: flex; justify-content: space-between; font-size: .66rem; margin-bottom: .4rem; }
.progress { height: .25rem; background: var(--paper-deep); }
.progress-bar { background: var(--olive-600); }
.progress-33 { width: 33%; }
.progress-66 { width: 66%; }
.progress-100 { width: 100%; }
.step-form { min-height: 0; display: grid; grid-template-rows: 1fr auto; }
.step-fields { min-height: 0; overflow-y: auto; padding: .75rem clamp(1rem, 4vw, 2rem) 1.5rem; }
.step-actions {
  display: flex; align-items: center; justify-content: flex-end; gap: .75rem;
  padding: .8rem clamp(1rem, 4vw, 2rem) max(.8rem, env(safe-area-inset-bottom));
  border-top: 1px solid rgba(36, 37, 31, .18); background: rgba(247,243,233,.96);
}
.step-actions .btn:first-child { margin-right: auto; }
.question-block { border: 0; padding: 0 0 1.4rem; margin: 0 0 1.4rem; border-bottom: 1px solid rgba(36,37,31,.15); }
.question-block:last-child { border-bottom: 0; }
.question-block legend { font-size: clamp(1.05rem, 3vw, 1.3rem); margin-bottom: .75rem; }
.question-block.has-error { border-left: .25rem solid #9f302b; padding-left: .8rem; }
.range-row { display: grid; grid-template-columns: 1fr 3.2rem; gap: 1rem; align-items: center; }
.range-row output { font-family: "IBM Plex Mono", monospace; font-size: 1.45rem; text-align: center; }
.form-range { accent-color: var(--olive-800); }
.scale-anchors { font-size: .78rem; color: #62675a; margin-top: .15rem; }
.unknown-toggle { display: inline-flex; gap: .5rem; align-items: center; min-height: 2.75rem; margin-top: .3rem; }
.unknown-toggle input { inline-size: 1.1rem; block-size: 1.1rem; accent-color: var(--olive-800); }
.details-choice-mark { font-size: 7rem; line-height: 1; text-align: center; color: var(--olive-600); padding-top: 5vh; }

.title-row, .result-card header, .action-row { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.status-badge { font-size: .7rem; border: 1px solid; padding: .45rem .65rem; }
.join-box { display: grid; gap: .35rem; padding: 1rem; background: var(--paper-deep); margin: 1.4rem 0; overflow-wrap: anywhere; }
.session-code { font-size: 1.7rem; }
.action-row { justify-content: flex-start; flex-wrap: wrap; margin: 1rem 0; }
.summary-strip { display: grid; grid-template-columns: repeat(3, 1fr); margin: 2rem 0; border-block: 1px solid rgba(36,37,31,.2); }
.summary-strip div { padding: 1rem; border-right: 1px solid rgba(36,37,31,.2); }
.summary-strip div:last-child { border-right: 0; }
.summary-strip span { display: block; font: 500 .65rem/1.4 "IBM Plex Mono", monospace; letter-spacing: .08em; }
.summary-strip strong { font-size: 1.8rem; }
.sample-results { display: grid; gap: 1rem; }
.result-card { padding: 1rem; border: 1px solid rgba(36,37,31,.25); background: rgba(255,255,255,.32); }
.result-card header strong { display: block; font-size: 1.4rem; }
.identity { text-align: right; }
.metric-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: .5rem; margin: 1rem 0; }
.metric { min-width: 0; }
.metric span, .metric small { display: block; font-size: .58rem; overflow-wrap: anywhere; }
.metric strong { display: block; font-size: 1.55rem; }
.notice-box { margin-top: 2rem; padding: 1rem; border-left: .25rem solid var(--olive-600); background: var(--paper-deep); }
.rank-grid { display: grid; gap: .65rem; }
.rank-grid label { display: grid; grid-template-columns: 1fr 6rem; align-items: center; gap: 1rem; }

@media (max-width: 600px) {
  .choice-grid.three { grid-template-columns: 1fr; }
  .metric-grid { grid-template-columns: repeat(3, 1fr); }
  .summary-strip { grid-template-columns: 1fr; }
  .summary-strip div { border-right: 0; border-bottom: 1px solid rgba(36,37,31,.2); }
  .summary-strip div:last-child { border-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}