/* ===== Hoffbrand Hotsite Styles ===== */

:root {
  --c-magenta: #a24191;
  --c-blue: #1f3f78;
  --c-gold: #d2a911;
  --c-bg: #f6f4ef;
  --c-bg-warm: #efeae0;
  --c-ink: #0e0e10;
  --c-ink-soft: #2a2a2e;
  --c-muted: #6a6a72;
  --c-line: #e6e1d5;
  --c-card: #0e0e10;
  --c-card-ink: #ffffff;
  --r-card: 22px;
  --r-pill: 999px;
  --container: 1280px;
  --header-h: 76px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body {
  margin: 0;
  font-family: 'Manrope', system-ui, -apple-system, sans-serif;
  background: var(--c-bg);
  color: var(--c-ink);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "ss02", "cv11";
  line-height: 1.5;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 28px; }

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(14, 14, 16, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: #fff;
}
.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.brand-logo img { width: 100%; height: 100%; object-fit: cover; }
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}
.brand-text .pub { font-size: 13px; opacity: 0.65; letter-spacing: 0.04em; text-transform: uppercase; }
.brand-text .title { font-size: 15px; font-weight: 600; }

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav a {
  color: #ddd;
  font-size: 14.5px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  transition: background .2s, color .2s;
}
.nav a:hover { background: rgba(255,255,255,0.08); color: #fff; }
.nav .cta {
  background: var(--c-gold);
  color: #1a1305;
  font-weight: 700;
  margin-left: 8px;
  padding: 9px 18px;
}
.nav .cta:hover { background: #e8bd1f; color: #1a1305; }

.menu-toggle { display: none; color: #fff; padding: 8px; }

/* ===== Hero ===== */
.hero {
  position: relative;
  margin-top: var(--header-h);
  min-height: calc(100vh - var(--header-h));
  background: var(--c-blue);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute; inset: 0;
  background-image: url('assets/hero_background.png');
  background-size: cover;
  background-position: center;
  opacity: 0.55;
  z-index: -1;
}
.hero-bg::after {
  content: '';
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(31,63,120,.55) 0%, rgba(31,63,120,.85) 70%, rgba(31,63,120,.95) 100%),
    radial-gradient(ellipse at 70% 30%, rgba(162,65,145,.25), transparent 60%);
}
.hero .container {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 48px;
  align-items: center;
  padding-top: 80px;
  padding-bottom: 80px;
  min-height: calc(100vh - var(--header-h));
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.18);
  padding: 6px 14px 6px 8px;
  border-radius: var(--r-pill);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 22px;
}
.hero-eyebrow .dot {
  width: 22px; height: 22px;
  background: var(--c-gold);
  border-radius: 50%;
  display: inline-block;
}
.hero h1 {
  font-size: clamp(40px, 5.4vw, 76px);
  line-height: 0.98;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  text-wrap: balance;
}
.hero h1 .accent { color: var(--c-gold); }
.hero h1 .edition {
  display: inline-block;
  font-size: 0.4em;
  vertical-align: top;
  background: var(--c-magenta);
  padding: 6px 14px;
  border-radius: 8px;
  margin-left: 12px;
  letter-spacing: 0.02em;
  font-weight: 700;
  transform: translateY(8px);
}
.hero p.lead {
  font-size: 17px;
  line-height: 1.6;
  color: rgba(255,255,255,0.88);
  max-width: 56ch;
  margin: 0 0 32px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: var(--r-pill);
  font-weight: 700;
  font-size: 15px;
  transition: transform .15s, background .2s, color .2s, border-color .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--c-gold); color: #1a1305; }
.btn-primary:hover { background: #ecbf26; }
.btn-secondary { background: rgba(255,255,255,0.1); color: #fff; border: 1px solid rgba(255,255,255,0.3); }
.btn-secondary:hover { background: rgba(255,255,255,0.18); }
.btn-dark { background: var(--c-card); color: #fff; }
.btn-dark:hover { background: #25252b; }

.hero-mockup {
  position: relative;
  display: grid;
  place-items: center;
}
.hero-mockup img {
  max-height: 720px;
  width: auto;
  filter: drop-shadow(0 40px 60px rgba(0,0,0,0.45));
  transform: rotate(-3deg);
}
.hero-tags {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 10px;
  bottom: 40px;
  left: 0;
}
.hero-tag {
  background: rgba(14,14,16,0.7);
  border: 1px solid rgba(255,255,255,0.14);
  padding: 8px 14px;
  border-radius: var(--r-pill);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  backdrop-filter: blur(8px);
}
.hero-tag .swatch {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}

/* ===== Section Common ===== */
section { padding: 110px 0; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--c-magenta);
  margin-bottom: 16px;
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 28px; height: 2px;
  background: currentColor;
}
.section-title {
  font-size: clamp(32px, 3.8vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0 0 18px;
  text-wrap: balance;
}
.section-lead {
  font-size: 18px;
  color: var(--c-ink-soft);
  max-width: 64ch;
  margin: 0 0 50px;
  line-height: 1.55;
}

/* ===== About ===== */
#sobre { background: var(--c-bg); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.about-copy p {
  font-size: 17px;
  color: var(--c-ink-soft);
  line-height: 1.7;
  margin: 0 0 18px;
}
.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 36px;
}
.stat-card {
  background: var(--c-card);
  color: #fff;
  border-radius: var(--r-card);
  padding: 24px;
}
.stat-card .num {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
}
.stat-card .num .accent { color: var(--c-gold); }
.stat-card .label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 10px;
  color: rgba(255,255,255,0.7);
}
.about-feature {
  background: var(--c-card);
  color: #fff;
  border-radius: var(--r-card);
  padding: 36px;
  position: relative;
  overflow: hidden;
}
.about-feature::before {
  content: '';
  position: absolute;
  top: -100px; right: -100px;
  width: 280px; height: 280px;
  background: var(--c-magenta);
  border-radius: 50%;
  opacity: 0.5;
  filter: blur(40px);
}
.about-feature h3 {
  font-size: 24px;
  margin: 0 0 14px;
  font-weight: 700;
  position: relative;
}
.about-feature ul {
  list-style: none;
  padding: 0; margin: 0;
  position: relative;
}
.about-feature li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 15.5px;
  color: rgba(255,255,255,0.88);
}
.about-feature li:first-child { border-top: 0; }
.about-feature li .check {
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--c-gold);
  color: #1a1305;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 13px;
  margin-top: 1px;
}

/* ===== Authors ===== */
#autores {
  background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-bg-warm) 100%);
}
.authors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.author-card {
  background: var(--c-card);
  color: #fff;
  border-radius: var(--r-card);
  padding: 28px;
  position: relative;
  overflow: hidden;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform .25s;
}
.author-card:hover { transform: translateY(-4px); }
.author-card .initials {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-magenta), var(--c-blue));
  display: grid;
  place-items: center;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.02em;
  border: 2px solid rgba(255,255,255,0.1);
}
.author-card:nth-child(2) .initials { background: linear-gradient(135deg, var(--c-blue), var(--c-gold)); }
.author-card:nth-child(3) .initials { background: linear-gradient(135deg, var(--c-gold), var(--c-magenta)); color: #1a1305; }
.author-card:nth-child(4) .initials { background: linear-gradient(135deg, var(--c-magenta), var(--c-gold)); }
.author-card .name {
  font-size: 20px;
  font-weight: 700;
  margin: 18px 0 6px;
  line-height: 1.15;
}
.author-card .role {
  font-size: 13.5px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 14px;
  line-height: 1.4;
}
.author-card .bio {
  font-size: 13.5px;
  color: rgba(255,255,255,0.78);
  line-height: 1.5;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 14px;
}
.author-credits {
  margin-top: 28px;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--c-muted);
}
.author-credits strong { color: var(--c-ink); font-weight: 700; }

/* ===== Summary ===== */
#sumario { background: var(--c-bg); }
.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.chapter-card {
  background: var(--c-card);
  color: #fff;
  border-radius: var(--r-card);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 160px;
  position: relative;
  overflow: hidden;
  transition: transform .25s;
  cursor: default;
}
.chapter-card:hover { transform: translateY(-3px); }
.chapter-card .num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-gold);
}
.chapter-card h4 {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.25;
  flex-grow: 1;
}
.chapter-card .meta {
  font-size: 12.5px;
  color: rgba(255,255,255,0.55);
  display: flex;
  gap: 14px;
  align-items: center;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 12px;
}
.chapter-card .meta .badge {
  background: rgba(162,65,145,0.25);
  color: #f0c4e7;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  font-weight: 600;
}

/* ===== Quiz ===== */
#quiz {
  background: linear-gradient(180deg, var(--c-bg-warm) 0%, var(--c-bg) 100%);
}
.quiz-shell {
  background: var(--c-card);
  color: #fff;
  border-radius: 32px;
  overflow: hidden;
  position: relative;
}
.quiz-header {
  padding: 32px 40px 20px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: end;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.quiz-header h3 {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.quiz-header .sub {
  color: rgba(255,255,255,0.65);
  font-size: 14.5px;
}
.quiz-stats {
  display: flex;
  gap: 12px;
  align-items: stretch;
}
.stat-pill {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 12px 16px;
  min-width: 150px;
}
.stat-pill-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  font-weight: 700;
  margin-bottom: 4px;
}
.stat-pill-value {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.01em;
  line-height: 1.1;
}
.stat-pill-value .hit { color: var(--c-gold); }
.stat-pill-value .of { color: rgba(255,255,255,0.4); font-weight: 600; font-size: 18px; }
.quiz-progress {
  height: 4px;
  background: rgba(255,255,255,0.1);
  border-radius: var(--r-pill);
  overflow: hidden;
  margin-top: 8px;
}
.quiz-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--c-magenta), var(--c-gold));
  width: 0%;
  transition: width .4s;
}
.chip.done {
  background: rgba(210,169,17,0.15);
  color: var(--c-gold);
  border-color: rgba(210,169,17,0.3);
}
.chip.active.done { background: var(--c-gold); color: #1a1305; }
.result-table {
  margin: 28px auto 0;
  max-width: 720px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}
.result-row {
  display: grid;
  grid-template-columns: 70px 1fr 110px 60px;
  gap: 12px;
  align-items: center;
  padding: 10px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  font-size: 13px;
}
.result-row .rr-num { color: var(--c-gold); font-weight: 700; font-size: 12px; letter-spacing: 0.04em; }
.result-row .rr-title { color: rgba(255,255,255,0.85); font-weight: 500; }
.result-row .rr-bar { height: 6px; background: rgba(255,255,255,0.1); border-radius: 3px; overflow: hidden; }
.result-row .rr-bar-fill { height: 100%; background: linear-gradient(90deg, var(--c-magenta), var(--c-gold)); }
.result-row .rr-score { font-weight: 700; color: #fff; text-align: right; font-variant-numeric: tabular-nums; }
@media (max-width: 600px) {
  .result-row { grid-template-columns: 60px 1fr 50px; }
  .result-row .rr-bar { display: none; }
}

.quiz-chapter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 18px 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.chip {
  padding: 7px 14px;
  border-radius: var(--r-pill);
  background: rgba(255,255,255,0.06);
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .2s;
}
.chip:hover { background: rgba(255,255,255,0.12); color: #fff; }
.chip.active {
  background: var(--c-gold);
  color: #1a1305;
  border-color: var(--c-gold);
}

.quiz-body {
  padding: 36px 40px 40px;
  min-height: 380px;
}
.q-num {
  font-size: 12.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-gold);
  font-weight: 700;
  margin-bottom: 12px;
}
.q-text {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.35;
  margin: 0 0 28px;
  color: #fff;
  text-wrap: pretty;
}
.q-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}
.opt {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  border-radius: 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  cursor: pointer;
  transition: all .2s;
  text-align: left;
  width: 100%;
}
.opt:hover:not(.locked) { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.18); }
.opt .letter {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  margin-top: 1px;
  transition: all .2s;
}
.opt .text {
  font-size: 15.5px;
  line-height: 1.5;
  color: rgba(255,255,255,0.92);
}
.opt.correct {
  background: rgba(48, 142, 84, 0.15);
  border-color: #4ea872;
}
.opt.correct .letter { background: #4ea872; color: #fff; }
.opt.incorrect {
  background: rgba(196, 60, 60, 0.15);
  border-color: #c44545;
}
.opt.incorrect .letter { background: #c44545; color: #fff; }
.opt.locked { cursor: default; }
.opt.locked.dim { opacity: 0.45; }

.q-feedback {
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 24px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  font-size: 14.5px;
  line-height: 1.55;
}
.q-feedback.correct {
  background: rgba(48, 142, 84, 0.12);
  border: 1px solid rgba(78, 168, 114, 0.4);
  color: #c2eccf;
}
.q-feedback.incorrect {
  background: rgba(196, 60, 60, 0.12);
  border: 1px solid rgba(196, 69, 69, 0.4);
  color: #f0c8c8;
}
.q-feedback .ico {
  flex-shrink: 0;
  width: 24px; height: 24px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 14px;
  margin-top: 1px;
}
.q-feedback.correct .ico { background: #4ea872; color: #fff; }
.q-feedback.incorrect .ico { background: #c44545; color: #fff; }
.q-feedback strong { display: block; margin-bottom: 4px; color: #fff; font-size: 15px; }

.quiz-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 8px;
}
.quiz-nav .pager-info {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
}
.quiz-nav .actions { display: flex; gap: 10px; }
.q-btn {
  padding: 11px 20px;
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: 600;
  background: rgba(255,255,255,0.08);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.15);
  transition: all .2s;
}
.q-btn:hover:not(:disabled) { background: rgba(255,255,255,0.16); }
.q-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.q-btn.primary {
  background: var(--c-gold);
  color: #1a1305;
  border-color: var(--c-gold);
}
.q-btn.primary:hover:not(:disabled) { background: #ecbf26; }

/* Quiz results */
.quiz-result {
  padding: 50px 40px;
  text-align: center;
}
.quiz-result .badge-result {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  background: rgba(210,169,17,0.18);
  color: var(--c-gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.quiz-result h3 {
  font-size: 36px;
  font-weight: 800;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}
.quiz-result .ring {
  width: 180px; height: 180px;
  margin: 24px auto 28px;
  position: relative;
}
.quiz-result .ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.quiz-result .ring .track { fill: none; stroke: rgba(255,255,255,0.08); stroke-width: 14; }
.quiz-result .ring .fill { fill: none; stroke: url(#ring-grad); stroke-width: 14; stroke-linecap: round; transition: stroke-dashoffset 1s ease; }
.quiz-result .ring-label {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
}
.quiz-result .ring-label .pct { font-size: 44px; font-weight: 800; letter-spacing: -0.02em; line-height: 1; }
.quiz-result .ring-label .of { font-size: 13px; color: rgba(255,255,255,0.55); margin-top: 6px; letter-spacing: 0.06em; text-transform: uppercase; }
.quiz-result .summary-row {
  display: flex; justify-content: center; gap: 32px;
  margin-bottom: 28px; flex-wrap: wrap;
}
.quiz-result .summary-row .stat .v { font-size: 24px; font-weight: 800; }
.quiz-result .summary-row .stat .l { font-size: 12px; color: rgba(255,255,255,0.55); text-transform: uppercase; letter-spacing: 0.08em; }
.quiz-result .summary-row .stat .v.ok { color: #82d39b; }
.quiz-result .summary-row .stat .v.no { color: #e89090; }

/* ===== Chapter summary (between chapters) ===== */
.quiz-body.chap-summary {
  padding: 36px 32px 28px;
}
.cs-head {
  text-align: center;
  margin-bottom: 28px;
}
.cs-eyebrow {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-gold);
  font-weight: 700;
  margin-bottom: 10px;
}
.cs-title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
  color: #fff;
}
.cs-msg {
  color: rgba(255,255,255,0.7);
  font-size: 15px;
  line-height: 1.6;
  max-width: 52ch;
  margin: 0 auto;
}
.cs-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 36px;
  align-items: center;
  padding: 24px 0 8px;
  border-top: 1px solid rgba(255,255,255,0.08);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 8px;
}
.cs-ring-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.cs-ring {
  width: 160px; height: 160px;
  position: relative;
}
.cs-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.cs-ring .track { fill: none; stroke: rgba(255,255,255,0.08); stroke-width: 12; }
.cs-ring .fill { fill: none; stroke: var(--c-gold); stroke-width: 12; stroke-linecap: round; transition: stroke-dashoffset 1s ease; }
.cs-ring-label {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
}
.cs-ring-label .pct { font-size: 36px; font-weight: 800; letter-spacing: -0.02em; line-height: 1; color: #fff; }
.cs-ring-label .of { font-size: 11px; color: rgba(255,255,255,0.55); margin-top: 6px; letter-spacing: 0.08em; text-transform: uppercase; }
.cs-score-line {
  text-align: center;
  font-size: 15px;
  color: rgba(255,255,255,0.85);
  line-height: 1.5;
}
.cs-score-line strong { color: var(--c-gold); font-weight: 800; }
.cs-skipped { color: rgba(255,255,255,0.55); }
.cs-questions-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  font-weight: 700;
  margin-bottom: 14px;
}
.cs-dots {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  gap: 8px;
  margin-bottom: 18px;
}
.cs-dot {
  aspect-ratio: 1;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .15s ease;
  border: 2px solid transparent;
  font-variant-numeric: tabular-nums;
}
.cs-dot:hover { transform: scale(1.1); }
.cs-dot.correct { background: rgba(99,189,128,0.18); border-color: #63bd80; color: #c8efd4; }
.cs-dot.incorrect { background: rgba(232,144,144,0.16); border-color: #e89090; color: #f5cccc; }
.cs-dot.skipped { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.18); color: rgba(255,255,255,0.5); }
.cs-legend {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 12px;
  color: rgba(255,255,255,0.6);
}
.cs-legend span { display: inline-flex; align-items: center; gap: 6px; }
.cs-legend i.dot {
  width: 10px; height: 10px; border-radius: 50%;
  border: 2px solid;
  display: inline-block;
}
.cs-legend i.dot.correct { background: rgba(99,189,128,0.3); border-color: #63bd80; }
.cs-legend i.dot.incorrect { background: rgba(232,144,144,0.3); border-color: #e89090; }
.cs-legend i.dot.skipped { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.25); }
@media (max-width: 720px) {
  .cs-grid { grid-template-columns: 1fr; gap: 24px; }
  .cs-title { font-size: 22px; }
  .quiz-body.chap-summary { padding: 28px 20px 20px; }
}

/* ===== FAQ ===== */
#faq { background: var(--c-card); color: #fff; }
#faq .section-title { color: #fff; }
#faq .eyebrow { color: var(--c-gold); }
#faq .section-lead { color: rgba(255,255,255,0.7); }
.faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  max-width: 920px;
  margin: 0 auto;
}
.faq-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 18px;
  overflow: hidden;
  transition: background .2s;
}
.faq-item[open] { background: rgba(255,255,255,0.07); border-color: rgba(255,255,255,0.18); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 17px;
  font-weight: 600;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 24px;
  font-weight: 300;
  color: var(--c-gold);
  transition: transform .25s;
  line-height: 1;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .answer {
  padding: 0 26px 24px;
  color: rgba(255,255,255,0.78);
  font-size: 15.5px;
  line-height: 1.65;
}

/* ===== Footer ===== */
.site-footer {
  background: #060607;
  color: #fff;
  padding: 70px 0 30px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}
.footer-brand .brand-logo { background: #fff; }
.footer-brand .footer-tag {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.55);
  text-transform: uppercase;
}
.footer-brand .footer-name { font-weight: 700; font-size: 16px; }
.footer-about p {
  color: rgba(255,255,255,0.7);
  font-size: 14.5px;
  line-height: 1.6;
  max-width: 42ch;
}
.footer-col h5 {
  margin: 0 0 16px;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  font-weight: 700;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { color: rgba(255,255,255,0.85); font-size: 15px; transition: color .2s; }
.footer-col a:hover { color: var(--c-gold); }

.social-row { display: flex; gap: 10px; flex-wrap: wrap; }
.social-row a {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: grid;
  place-items: center;
  transition: background .2s, transform .2s;
}
.social-row a:hover { background: var(--c-gold); transform: translateY(-2px); }
.social-row a:hover svg { fill: #1a1305; }
.social-row svg { width: 18px; height: 18px; fill: #fff; transition: fill .2s; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}
.footer-bottom .legal-links { display: flex; gap: 18px; }
.footer-bottom a:hover { color: #fff; }

/* ===== Responsive ===== */
@media (max-width: 980px) {
  .nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; flex-direction: column; background: #0e0e10; padding: 12px; gap: 4px; align-items: stretch; border-top: 1px solid rgba(255,255,255,0.08); }
  .nav.open { display: flex; }
  .nav a { padding: 12px 16px; }
  .nav .cta { margin: 8px 0 0; text-align: center; }
  .menu-toggle { display: block; }
  .hero .container { grid-template-columns: 1fr; gap: 32px; }
  .hero-mockup { order: -1; }
  .hero-mockup img { max-height: 460px; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .authors-grid { grid-template-columns: repeat(2, 1fr); }
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  section { padding: 80px 0; }
  .quiz-header { padding: 24px; grid-template-columns: 1fr; }
.quiz-progress-wrap { display: none; }
  .quiz-body { padding: 24px; }
  .quiz-chapter-bar { padding: 14px 24px; }
}
@media (max-width: 600px) {
  .container { padding: 0 18px; }
  .authors-grid { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: 1fr; }
  .hero h1 .edition { display: block; margin: 12px 0 0; }
  .quiz-result h3 { font-size: 26px; }
  .brand-text .pub { display: none; }
}