/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  /* Núcleo — consola oscura, identidad única y deliberada (no conmuta con el tema del sistema) */
  --bg: #090a0f;
  --surface: #12141c;
  --surface-soft: #191c26;
  --surface-raised: #1f2330;
  --border: #262a37;
  --border-strong: #363c4d;
  --text: #f1f2f6;
  --text-soft: #9aa0b2;
  --text-faint: #656b7d;

  --accent: #3a5afb;
  --accent-dark: #2743d1;
  --accent-bright: #7d95ff;
  --accent-soft: rgba(58, 90, 251, 0.14);
  --accent-line: rgba(58, 90, 251, 0.4);
  --accent-contrast: #f1f2f6;

  --amber: #ffb020;
  --amber-soft: rgba(255, 176, 32, 0.12);

  --danger: #ff4d5e;
  --danger-soft: rgba(255, 77, 94, 0.12);
  --success: #2fe0a8;
  --success-soft: rgba(47, 224, 168, 0.12);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(58, 90, 251, 0.08);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.6);
  --glow-accent: 0 0 0 1px var(--accent-line), 0 0 24px rgba(58, 90, 251, 0.22);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);

  --sans: "Rajdhani", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --display: "Orbitron", "Rajdhani", sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  color-scheme: dark;
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; overflow-x: clip; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}

img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.15; letter-spacing: .01em; font-family: var(--sans); font-weight: 700; text-transform: uppercase; }
ul { list-style: none; padding: 0; }
::selection { background: var(--accent); color: #fff; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* =============================================================
   3. Utilities
   ============================================================= */
.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--accent); color: var(--accent-contrast);
  z-index: 9999; border-radius: var(--radius-sm); font-weight: 700;
}
.skip-link:focus { top: 1rem; }

.container { width: 100%; max-width: 1080px; margin-inline: auto; padding-inline: 1.25rem; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.section-head { max-width: 640px; margin-bottom: 2rem; }
.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--mono); font-size: .74rem; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent);
  margin-bottom: .9rem;
}
.eyebrow::before { content: "//"; color: var(--text-faint); }
.section-head h2 { font-family: var(--sans); font-weight: 700; font-size: clamp(1.5rem, 3vw, 2.1rem); margin-bottom: .5rem; text-transform: uppercase; letter-spacing: .01em; }
.section-head p { color: var(--text-soft); font-size: 1.02rem; }

/* =============================================================
   4. Buttons & form controls
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .8rem 1.4rem; border-radius: var(--radius-sm); font-family: var(--sans);
  font-weight: 700; font-size: 1rem; letter-spacing: .02em; text-transform: uppercase;
  transition: transform .18s var(--ease-out), box-shadow .18s var(--ease-out), background .18s var(--ease-out), border-color .18s var(--ease-out);
  white-space: nowrap; border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: var(--accent-contrast); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--accent-bright); transform: translateY(-1px); box-shadow: var(--glow-accent); }
.btn-ghost { background: var(--surface-soft); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--surface-raised); border-color: var(--border-strong); }
.btn-outline { background: transparent; border-color: var(--accent-line); color: var(--accent); }
.btn-outline:hover { background: var(--accent-soft); border-color: var(--accent); }
.btn:disabled { opacity: .4; cursor: not-allowed; transform: none !important; box-shadow: none !important; }
.btn-block { width: 100%; }
.btn-sm { padding: .5rem 1rem; font-size: .8rem; }

.field { display: flex; flex-direction: column; gap: .4rem; }
.field label { font-family: var(--mono); font-size: .78rem; font-weight: 500; letter-spacing: .03em; color: var(--text-soft); text-transform: uppercase; }
.field input[type="text"], .field select {
  padding: .75rem .9rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface-soft); color: var(--text); font-size: 1rem; font-family: var(--sans);
}
.field input[type="text"]:focus, .field select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }

/* =============================================================
   5. Header
   ============================================================= */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 var(--accent-line);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: .6rem; font-weight: 700; font-size: 1.05rem; }
.brand .mascot-mini { width: 20px; height: auto; }
.brand-name { font-family: var(--display); text-transform: uppercase; letter-spacing: .03em; }
.header-actions { display: flex; align-items: center; gap: .6rem; }
.header-nav { display: none; }
@media (min-width: 720px) {
  .header-nav { display: flex; gap: 1.4rem; font-family: var(--mono); font-size: .82rem; font-weight: 500; letter-spacing: .02em; text-transform: uppercase; color: var(--text-soft); }
  .header-nav a:hover { color: var(--accent); }
}

.account-area { display: flex; align-items: center; }
.account-logged-out, .account-logged-in { display: flex; align-items: center; gap: .5rem; }
.account-logged-out[hidden], .account-logged-in[hidden] { display: none; }
.account-chip {
  display: flex; align-items: center; gap: .4rem; padding: .5rem .8rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface-soft); color: var(--text);
  font-family: var(--mono); font-size: .78rem; font-weight: 600; cursor: pointer; max-width: 96px;
}
.account-chip:hover { border-color: var(--accent); color: var(--accent); }
.account-chip-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account-icon-btn {
  display: none; align-items: center; justify-content: center; width: 34px; height: 34px;
  border-radius: 50%; border: 1px solid var(--border); background: var(--surface-soft); color: var(--text);
  cursor: pointer; flex-shrink: 0;
}
.account-icon-btn svg { width: 17px; height: 17px; }
.account-icon-btn:hover { border-color: var(--accent); color: var(--accent); }
@media (max-width: 719px) {
  .brand-name { display: none; }
  .account-btn-full { display: none; }
  .account-icon-btn { display: flex; }
  .account-logged-in .btn[data-logout] { display: none; }
  .account-chip { max-width: 82px; padding: .5rem .6rem; }
}

/* =============================================================
   6. Hero / Tool
   ============================================================= */
.hero { padding-block: clamp(1.2rem, 5vw, 3rem) 1rem; }
.hero-top { display: grid; gap: .8rem; align-items: end; }
.hero-copy h1 {
  font-family: var(--sans); font-weight: 700; text-transform: uppercase; letter-spacing: .01em;
  font-size: clamp(1.7rem, 4.6vw, 3.2rem);
  max-width: 17ch;
}
.hero-copy .accent-word { color: var(--accent); }
.hero-copy p.lead { color: var(--text-soft); font-size: 1.05rem; margin-top: .6rem; max-width: 52ch; }
.trust-row { display: flex; flex-wrap: wrap; gap: .4rem 1.2rem; margin-top: .8rem; }
@media (max-width: 539px) { .trust-row { display: none; } }
.trust-item { display: flex; align-items: center; gap: .4rem; font-family: var(--mono); font-size: .78rem; color: var(--text-soft); font-weight: 500; letter-spacing: .02em; }
.trust-item svg { width: 14px; height: 14px; color: var(--accent); flex-shrink: 0; }

/* ---- Tool card (consola) ---- */
.tool-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
  padding: clamp(1.1rem, 3vw, 2rem); margin-top: 1.2rem; position: relative;
}
.tool-card::before, .tool-card::after {
  content: ""; position: absolute; width: 18px; height: 18px; pointer-events: none;
  border-color: var(--accent-line); opacity: .8;
}
.tool-card::before { top: -1px; left: -1px; border-top: 2px solid; border-left: 2px solid; border-top-left-radius: var(--radius-lg); }
.tool-card::after { bottom: -1px; right: -1px; border-bottom: 2px solid; border-right: 2px solid; border-bottom-right-radius: var(--radius-lg); }
.tool-card-head { display: flex; align-items: center; gap: .7rem; margin-bottom: 1rem; }
.tool-card-head .mascot-mini { width: 24px; height: auto; flex-shrink: 0; }
.tool-card-head h2 { font-family: var(--sans); font-weight: 700; text-transform: uppercase; letter-spacing: .02em; font-size: 1.2rem; }
.tool-card-head p { color: var(--text-soft); font-size: .92rem; }

/* config panel */
.config-grid { display: grid; gap: 1.4rem; }
@media (min-width: 720px) { .config-grid { grid-template-columns: 1.3fr 1fr; } }

.qty-label { font-family: var(--mono); font-weight: 500; font-size: .8rem; letter-spacing: .04em; text-transform: uppercase; color: var(--text-soft); margin-bottom: .7rem; display: block; }
.qty-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: .55rem; }
.qty-btn {
  padding: .8rem .4rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface-soft); text-align: center; font-family: var(--mono); font-weight: 700; font-size: 1.15rem;
  color: var(--text); transition: all .18s var(--ease-out);
}
.qty-btn small { display: block; font-weight: 500; font-size: .64rem; letter-spacing: .04em; text-transform: uppercase; color: var(--text-faint); margin-top: .2rem; font-family: var(--sans); }
.qty-btn:hover { border-color: var(--accent); color: var(--accent); }
.qty-btn.is-active { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.qty-btn.is-active small { color: var(--accent-bright); }

.area-select-wrap { display: flex; flex-direction: column; gap: .6rem; }

/* specialty trigger button (opens dialog) */
.specialty-trigger {
  display: flex; align-items: center; justify-content: space-between; gap: .6rem; width: 100%;
  padding: .75rem .9rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface-soft); color: var(--text); font-size: 1rem; font-family: var(--sans); text-align: left;
  transition: all .18s var(--ease-out);
}
.specialty-trigger:hover { border-color: var(--accent); }
.specialty-trigger svg { width: 16px; height: 16px; color: var(--text-faint); flex-shrink: 0; }

.specialty-warning { color: var(--danger); font-family: var(--mono); font-size: .82rem; margin: .3rem 0 0; }

/* specialty dialog */
.specialty-dialog {
  border: 1px solid var(--border-strong); border-radius: var(--radius-lg); background: var(--surface);
  color: var(--text); padding: 0; width: min(720px, 92vw); max-height: 86vh; box-shadow: var(--shadow-lg);
}
.specialty-dialog::backdrop { background: rgba(4, 5, 9, 0.72); backdrop-filter: blur(2px); }
.specialty-dialog-inner { display: flex; flex-direction: column; max-height: 86vh; }
.specialty-dialog-head {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1.2rem 1.4rem; border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.specialty-dialog-head h3 { font-family: var(--sans); font-weight: 700; text-transform: uppercase; letter-spacing: .02em; font-size: 1.05rem; }
.specialty-dialog-close {
  width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--border); background: var(--surface-soft);
  color: var(--text-soft); font-size: .9rem; line-height: 1; cursor: pointer; flex-shrink: 0;
}
.specialty-dialog-close:hover { border-color: var(--accent); color: var(--accent); }

.specialty-tabs { display: flex; gap: .4rem; padding: 1rem 1.4rem 0; flex-shrink: 0; }
.specialty-tab {
  padding: .5rem 1rem; border-radius: var(--radius-sm) var(--radius-sm) 0 0; border: 1px solid transparent;
  background: transparent; color: var(--text-soft); font-family: var(--mono); font-size: .78rem;
  font-weight: 600; letter-spacing: .02em; text-transform: uppercase; cursor: pointer;
}
.specialty-tab.is-active { color: var(--accent); border-color: var(--border); border-bottom-color: var(--surface); background: var(--surface-soft); }

.specialty-toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: .6rem;
  padding: .9rem 1.4rem; border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.specialty-counter { font-family: var(--mono); font-size: .78rem; color: var(--text-soft); margin-left: auto; }

.specialty-body { padding: 1.1rem 1.4rem; overflow-y: auto; flex: 1 1 auto; }
.specialty-group { margin-bottom: 1.3rem; }
.specialty-group:last-child { margin-bottom: 0; }
.specialty-group-label {
  font-family: var(--mono); font-size: .74rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
  color: var(--text-faint); margin-bottom: .6rem; display: block;
}
.specialty-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: .5rem; }
.specialty-card {
  display: flex; align-items: center; gap: .5rem; padding: .65rem .7rem; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface-soft); color: var(--text);
  font-size: .84rem; font-weight: 500; text-align: left; line-height: 1.25; cursor: pointer;
  transition: all .15s var(--ease-out);
}
.specialty-card:hover { border-color: var(--accent-line); }
.specialty-card.is-selected { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-bright); box-shadow: 0 0 0 1px var(--accent) inset; }
.specialty-card .chk {
  width: 16px; height: 16px; border-radius: 4px; border: 1px solid var(--border-strong); flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.specialty-card.is-selected .chk { background: var(--accent); border-color: var(--accent); }
.specialty-card .chk svg { width: 11px; height: 11px; color: var(--bg); opacity: 0; }
.specialty-card.is-selected .chk svg { opacity: 1; }

.specialty-chips { display: flex; flex-wrap: wrap; gap: .5rem; }
.specialty-chip {
  display: flex; align-items: center; gap: .4rem; padding: .4rem .5rem .4rem .8rem; border-radius: 999px;
  background: var(--accent-soft); border: 1px solid var(--accent-line); color: var(--accent-bright); font-size: .8rem; font-weight: 500;
}
.specialty-chip button {
  width: 18px; height: 18px; border-radius: 50%; border: none; background: transparent; color: var(--accent-bright);
  font-size: .85rem; line-height: 1; cursor: pointer;
}
.specialty-chip button:hover { color: var(--danger); }
.specialty-empty { color: var(--text-faint); font-size: .88rem; padding: .5rem 0; }

.specialty-dialog-foot { padding: 1.1rem 1.4rem; border-top: 1px solid var(--border); flex-shrink: 0; }
.specialty-dialog-foot .btn { width: 100%; }

/* auth dialog */
.auth-dialog { width: min(420px, 92vw); }
.auth-note { color: var(--text-soft); font-size: .86rem; margin-bottom: 1.1rem; }
.auth-form { display: flex; flex-direction: column; gap: .9rem; }
.auth-form[hidden] { display: none; }
.auth-form .btn { width: 100%; }
.auth-error { color: var(--danger); font-size: .84rem; margin: -.3rem 0 0; }
.auth-error.is-success { color: var(--success); }
.auth-link { background: none; border: none; color: var(--accent); font-size: .82rem; cursor: pointer; padding: 0; text-align: center; }
.auth-link:hover { text-decoration: underline; }

/* progress dialog */
.progress-dialog { width: min(560px, 92vw); }
.progress-summary { margin-bottom: 1.4rem; }
.progress-global {
  display: flex; flex-direction: column; align-items: center; gap: .2rem;
  padding: 1.2rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface-soft); margin-bottom: 1rem; text-align: center;
}
.progress-global-pct { font-family: var(--display); font-size: 2.2rem; font-weight: 700; color: var(--accent); }
.progress-global-label { font-family: var(--mono); font-size: .78rem; color: var(--text-soft); text-transform: uppercase; letter-spacing: .03em; }
.progress-core-list { display: flex; flex-direction: column; gap: .6rem; }
.progress-core-row { display: grid; grid-template-columns: 1fr auto; gap: .3rem 1rem; align-items: center; font-size: .88rem; }
.progress-core-row .b-track { grid-column: 1 / -1; height: 5px; background: var(--surface-soft); border-radius: var(--radius-sm); overflow: hidden; }
.progress-core-row .b-fill { height: 100%; background: var(--accent); }
.progress-core-row .b-name { font-weight: 600; }
.progress-core-row .b-score { font-family: var(--mono); color: var(--text-soft); font-variant-numeric: tabular-nums; }
.progress-history-title { font-family: var(--mono); font-size: .74rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--text-faint); margin: 1.2rem 0 .6rem; }
.progress-history { display: flex; flex-direction: column; gap: .5rem; }
.progress-history-row {
  display: flex; align-items: center; justify-content: space-between; gap: .8rem;
  padding: .6rem .7rem; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: .86rem;
}
.progress-history-row .ph-pct { font-family: var(--mono); font-weight: 700; color: var(--accent); }
.progress-history-row .ph-meta { color: var(--text-faint); font-size: .78rem; }
.progress-logout { margin-top: 1.3rem; width: 100%; }

.tool-card-footer {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 1rem; margin-top: 1.6rem; padding-top: 1.4rem; border-top: 1px dashed var(--border);
}
.est-time { font-size: .88rem; color: var(--text-soft); display: flex; align-items: center; gap: .4rem; }
.est-time strong { color: var(--text); }

.privacy-badge {
  display: flex; align-items: flex-start; gap: .5rem; font-size: .84rem; color: var(--text-soft);
  background: var(--surface-soft); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .7rem .9rem; margin-top: 1.1rem;
}
.privacy-badge svg { width: 18px; height: 18px; flex-shrink: 0; color: var(--accent); margin-top: 1px; }

/* =============================================================
   7. Exam runner
   ============================================================= */
.tool-card[data-state="idle"] .exam-shell,
.tool-card[data-state="idle"] .results-shell { display: none; }
.tool-card[data-state="running"] .config-shell,
.tool-card[data-state="running"] .results-shell { display: none; }
.tool-card[data-state="done"] .config-shell,
.tool-card[data-state="done"] .exam-shell { display: none; }

.exam-topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  margin-bottom: 1.2rem;
}
.exam-progress { flex: 1 1 220px; }
.progress-track { height: 6px; background: var(--surface-soft); border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); box-shadow: 0 0 8px var(--accent); transition: width .3s var(--ease-out); width: 0%; }
.progress-label { font-family: var(--mono); font-size: .78rem; color: var(--text-soft); margin-top: .5rem; font-weight: 500; letter-spacing: .02em; }

.timer {
  display: flex; align-items: center; gap: .45rem; font-family: var(--mono); font-weight: 700; font-size: 1.2rem;
  padding: .45rem 1rem; border-radius: var(--radius-sm); background: var(--surface-soft); border: 1px solid var(--border-strong);
  font-variant-numeric: tabular-nums; color: var(--text);
}
.timer svg { width: 17px; height: 17px; color: var(--accent); }
.timer.is-low { background: var(--danger-soft); color: var(--danger); border-color: var(--danger); }
.timer.is-low svg { color: var(--danger); }

.case-tags { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; margin-bottom: .9rem; }

.area-tag {
  display: inline-flex; align-items: center; gap: .3rem; font-family: var(--mono); font-size: .72rem; font-weight: 500; letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent); background: var(--accent-soft); border: 1px solid var(--accent-line); padding: .25rem .6rem; border-radius: var(--radius-sm); margin-bottom: 0;
}

.difficulty-tag {
  display: inline-flex; align-items: center; gap: .3rem; font-family: var(--mono); font-size: .72rem; font-weight: 500; letter-spacing: .04em; text-transform: uppercase;
  padding: .25rem .6rem; border-radius: var(--radius-sm); border: 1px solid transparent;
}
.difficulty-tag.is-facil { color: var(--success); background: var(--success-soft); border-color: rgba(47, 224, 168, 0.4); }
.difficulty-tag.is-medio { color: var(--amber); background: var(--amber-soft); border-color: rgba(255, 176, 32, 0.4); }
.difficulty-tag.is-dificil { color: var(--danger); background: var(--danger-soft); border-color: rgba(255, 77, 94, 0.4); }

.case-tag {
  display: inline-flex; align-items: center; gap: .3rem; font-family: var(--mono); font-size: .72rem; font-weight: 500; letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent-bright); background: var(--surface-soft); border: 1px solid var(--border-strong); padding: .25rem .6rem; border-radius: var(--radius-sm);
}

.case-stem { font-size: 1.04rem; line-height: 1.65; margin-bottom: .9rem; }
.case-question { font-weight: 700; font-size: 1.08rem; margin-bottom: 1.1rem; }

.options-list { display: flex; flex-direction: column; gap: .6rem; }
.option-btn {
  display: flex; align-items: flex-start; gap: .75rem; text-align: left;
  padding: .85rem 1rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface-soft); transition: all .14s var(--ease-out);
}
.option-btn:hover:not(:disabled) { border-color: var(--accent); background: var(--accent-soft); }
.option-letter {
  flex-shrink: 0; width: 26px; height: 26px; border-radius: var(--radius-sm); background: var(--surface-raised);
  display: flex; align-items: center; justify-content: center; font-family: var(--mono); font-weight: 700; font-size: .82rem; color: var(--text-soft);
}
.option-btn.is-correct { border-color: var(--success); background: var(--success-soft); }
.option-btn.is-correct .option-letter { background: var(--success); color: #06120d; }
.option-btn.is-wrong { border-color: var(--danger); background: var(--danger-soft); }
.option-btn.is-wrong .option-letter { background: var(--danger); color: #1a0708; }
.option-btn:disabled { cursor: default; }
.option-btn:disabled:not(.is-correct):not(.is-wrong) { opacity: .5; }

.feedback-panel {
  margin-top: 1.2rem; padding: 1rem 1.1rem; border-radius: var(--radius-sm);
  background: var(--surface-soft); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  display: none; gap: .7rem;
}
.feedback-panel.is-visible { display: flex; }
.feedback-panel.is-wrong { border-left-color: var(--danger); }
.feedback-panel .mascot-mini { width: 20px; height: auto; flex-shrink: 0; }
.feedback-panel h4 { font-family: var(--sans); font-weight: 700; text-transform: uppercase; letter-spacing: .02em; font-size: .92rem; margin-bottom: .3rem; }
.feedback-panel p { font-size: .92rem; color: var(--text-soft); }

.exam-nav { display: flex; justify-content: flex-end; margin-top: 1.3rem; }

.exit-exam-btn { font-family: var(--mono); font-size: .78rem; color: var(--text-faint); font-weight: 500; text-transform: uppercase; letter-spacing: .03em; }
.exit-exam-btn:hover { color: var(--danger); }

/* =============================================================
   8. Results
   ============================================================= */
.results-hero { display: flex; flex-wrap: wrap; align-items: center; gap: 1.4rem; margin-bottom: 1.6rem; }
.score-ring {
  width: 128px; height: 128px; border-radius: 50%; flex-shrink: 0;
  background: conic-gradient(var(--accent) calc(var(--pct, 0) * 1%), var(--surface-soft) 0);
  display: flex; align-items: center; justify-content: center; position: relative;
  box-shadow: 0 0 0 1px var(--border);
}
.score-ring::before { content: ""; position: absolute; inset: 10px; border-radius: 50%; background: var(--surface); }
.score-ring span { position: relative; font-family: var(--display); font-size: 1.6rem; font-weight: 700; color: var(--accent); }
.results-summary h3 { font-family: var(--sans); font-weight: 700; text-transform: uppercase; letter-spacing: .01em; font-size: 1.35rem; margin-bottom: .3rem; }
.results-summary p { color: var(--text-soft); }
.results-mascot { width: 28px; height: auto; margin-left: auto; align-self: flex-start; }

.breakdown-list { display: flex; flex-direction: column; gap: .6rem; margin-bottom: 1.6rem; }
.breakdown-row { display: grid; grid-template-columns: 1fr auto; gap: .3rem 1rem; align-items: center; font-size: .88rem; }
.breakdown-row .b-track { grid-column: 1 / -1; height: 5px; background: var(--surface-soft); border-radius: var(--radius-sm); overflow: hidden; }
.breakdown-row .b-fill { height: 100%; background: var(--accent); }
.breakdown-row .b-name { font-weight: 600; }
.breakdown-row .b-score { font-family: var(--mono); color: var(--text-soft); font-variant-numeric: tabular-nums; }

.results-actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-bottom: 1.6rem; }

.save-score-box {
  background: var(--surface-soft); border-radius: var(--radius-sm); padding: 1rem 1.1rem;
  margin-bottom: 1.8rem;
}
.save-score-box.is-saved { background: var(--success-soft); }
.save-score-guest p, .save-score-auth p { margin-bottom: .7rem; color: var(--text-soft); font-size: .92rem; }
.save-score-guest-actions { display: flex; flex-wrap: wrap; gap: .6rem; }
.save-score-auth strong { color: var(--text); }

.review-toggle { margin-bottom: 1rem; }
.review-list { display: none; flex-direction: column; gap: 1rem; }
.review-list.is-open { display: flex; }
.review-item { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 1rem; }
.review-item .rev-q { font-weight: 700; margin-bottom: .5rem; font-size: .95rem; }
.review-item .rev-ans { font-size: .88rem; margin-bottom: .3rem; }
.review-item .rev-ans.correct { color: var(--success); }
.review-item .rev-ans.wrong { color: var(--danger); }
.review-item .rev-fb { font-size: .86rem; color: var(--text-soft); margin-top: .5rem; padding-top: .5rem; border-top: 1px dashed var(--border); }

/* =============================================================
   9. Ranking
   ============================================================= */
.ranking-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.ranking-table th { text-align: left; font-family: var(--mono); color: var(--text-faint); font-size: .72rem; font-weight: 500; text-transform: uppercase; letter-spacing: .06em; padding-bottom: .6rem; border-bottom: 1px solid var(--border); }
.ranking-table td { padding: .7rem 0; border-bottom: 1px solid var(--border); }
.ranking-table td:nth-child(3), .ranking-table td:nth-child(4) { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.ranking-table tr:last-child td { border-bottom: none; }
.rank-pos { font-family: var(--mono); font-weight: 700; color: var(--text-faint); width: 2rem; }
.rank-pos.top { color: var(--accent); }
.rank-empty { text-align: center; padding: 2rem 1rem; color: var(--text-faint); font-size: .92rem; }

/* =============================================================
   10. Ad slots
   ============================================================= */
.ad-slot {
  display: flex; align-items: center; justify-content: center; flex-direction: column; gap: .3rem;
  border: 1px dashed var(--border-strong); border-radius: var(--radius-sm); background: var(--surface-soft);
  color: var(--text-faint); font-family: var(--mono); font-size: .78rem; font-weight: 500; letter-spacing: .1em; text-transform: uppercase;
}
.ad-slot span.ad-sub { font-size: .68rem; font-weight: 400; letter-spacing: 0; text-transform: none; font-family: var(--sans); }
.ad-banner { min-height: 100px; margin-block: 1.6rem; }
.ad-banner.wide { min-height: 120px; }
.ad-incontent { min-height: 250px; max-width: 336px; margin: 2rem auto; }

.corner-toast {
  position: fixed; bottom: 1rem; right: 1rem; z-index: 60;
  max-width: 260px; background: var(--surface); border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-lg);
  padding: .8rem .9rem; display: none; align-items: flex-start; gap: .6rem;
}
.corner-toast.is-visible { display: flex; }
.corner-toast .ct-close { flex-shrink: 0; color: var(--text-faint); font-size: 1.1rem; line-height: 1; padding: .1rem; }
.corner-toast .ct-body strong { display: block; font-family: var(--mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint); }
.corner-toast .ct-body span { font-size: .8rem; color: var(--text-soft); }

/* =============================================================
   11. How it works / FAQ / footer
   ============================================================= */
.steps-grid { display: grid; gap: 1.2rem; }
@media (min-width: 720px) { .steps-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .steps-grid { grid-template-columns: repeat(4, 1fr); } }
.step-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 1.3rem; }
.step-card .step-num {
  width: 32px; height: 32px; border-radius: var(--radius-sm); background: var(--accent-soft); color: var(--accent);
  border: 1px solid var(--accent-line);
  display: flex; align-items: center; justify-content: center; font-family: var(--mono); font-weight: 700; margin-bottom: .8rem;
}
.step-card h3 { font-family: var(--sans); font-weight: 700; text-transform: uppercase; letter-spacing: .01em; font-size: 1.02rem; margin-bottom: .4rem; }
.step-card p { font-size: .9rem; color: var(--text-soft); }

.seo-copy { max-width: 760px; }
.seo-copy p { margin-bottom: 1rem; color: var(--text-soft); }
.seo-copy h3 { font-family: var(--sans); font-weight: 700; text-transform: uppercase; letter-spacing: .01em; font-size: 1.15rem; margin: 1.4rem 0 .5rem; color: var(--text); }

.faq-list { max-width: 760px; display: flex; flex-direction: column; gap: .6rem; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); overflow: hidden; }
.faq-item summary {
  padding: 1rem 1.1rem; font-weight: 700; cursor: pointer; list-style: none; display: flex;
  justify-content: space-between; align-items: center; gap: 1rem; font-size: .96rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-family: var(--mono); font-size: 1.3rem; color: var(--accent); flex-shrink: 0; transition: transform .2s var(--ease-out); }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-a { padding: 0 1.1rem 1.1rem; color: var(--text-soft); font-size: .92rem; }

.site-footer { border-top: 1px solid var(--border); padding-block: 2.2rem; margin-top: 2rem; background: var(--surface); }
.footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1.5rem; }
.footer-brand { display: flex; align-items: center; gap: .5rem; font-family: var(--display); text-transform: uppercase; letter-spacing: .03em; font-weight: 700; }
.footer-brand .mascot-mini { width: 18px; height: auto; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem 1.4rem; font-family: var(--mono); font-size: .82rem; text-transform: uppercase; letter-spacing: .02em; color: var(--text-soft); }
.footer-links a:hover { color: var(--accent); }
.footer-note { font-size: .78rem; color: var(--text-faint); margin-top: 1.2rem; max-width: 760px; }

/* =============================================================
   12. Legal pages
   ============================================================= */
.legal-page { padding-block: 3rem; }
.legal-page .container { max-width: 760px; }
.legal-page h1 { font-family: var(--sans); font-weight: 700; text-transform: uppercase; font-size: 2rem; margin-bottom: 1.2rem; }
.legal-page h2 { font-family: var(--sans); font-weight: 700; text-transform: uppercase; font-size: 1.2rem; margin: 1.6rem 0 .6rem; }
.legal-page p, .legal-page li { color: var(--text-soft); margin-bottom: .7rem; }
.legal-page li { list-style: disc; margin-left: 1.4rem; }

/* =============================================================
   13. No-JS fallback
   ============================================================= */
.no-js-note { display: none; padding: 1rem; background: var(--amber-soft); border: 1px solid var(--amber); color: var(--text); border-radius: var(--radius-sm); font-size: .9rem; }
html.no-js .no-js-note { display: block; }
html.no-js .config-shell .btn-primary { display: none; }

/* =============================================================
   14. Reduced motion (intrusive only) + mascot motion
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .mascot-bob { animation: none !important; }
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}
.mascot-bob { animation: bob 3.6s ease-in-out infinite; transform-origin: center; }