:root {
  --ink: #172232;
  --ink-soft: #4a5a6d;
  --muted: #6b7a8d;
  --line: #dbe2ea;
  --paper: #ffffff;
  --wash: #f4f7fa;
  --accent: #0f766e;
  --accent-dark: #0b5f59;
  --accent-soft: #e3f4f0;
  --warn: #9a5b00;
  --warn-soft: #fff5df;
  --danger: #b42318;
  --danger-soft: #fef1ef;
  --ok: #166534;
  --ok-soft: #e9f8ee;
  --radius: 18px;
  --shadow: 0 18px 50px rgba(23, 34, 50, 0.08);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1100px 520px at 82% -120px, rgba(15, 118, 110, 0.16), transparent 70%),
    radial-gradient(900px 420px at -10% 10%, rgba(28, 88, 160, 0.09), transparent 65%),
    var(--wash);
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.status-banner {
  background: var(--warn-soft);
  color: var(--warn);
  border-bottom: 1px solid #f0d8a8;
  padding: 0.6rem 1.25rem;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
}

.status-banner.test-mode {
  background: #1d4ed8;
  color: #fff;
  border-color: #1d4ed8;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 3.5rem);
  max-width: 1180px;
  width: 100%;
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 750;
  letter-spacing: -0.01em;
  font-size: 1.12rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.92rem;
}

.site-nav a,
.site-footer a {
  color: var(--ink-soft);
  text-decoration: none;
}

.site-nav a:hover,
.site-footer a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.app {
  flex: 1;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2.5rem) clamp(1rem, 4vw, 2rem) 4rem;
}

.loading {
  color: var(--muted);
  padding: 3rem 0;
  text-align: center;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  padding: clamp(1rem, 2vw, 2rem) 0 2.5rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  margin: 0 0 1rem;
}

.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin: 0 0 1rem;
}

.hero h1 em {
  color: var(--accent);
  font-style: normal;
}

.hero-lead {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--ink-soft);
  max-width: 40rem;
  margin: 0 0 1.5rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.hero-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.hero-card h2 {
  margin: 0 0 1rem;
  font-size: 1.05rem;
}

.price-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.price {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.price-note {
  color: var(--muted);
  font-size: 0.9rem;
}

.checklist {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.55rem;
  font-size: 0.94rem;
  color: var(--ink-soft);
}

.checklist li {
  display: flex;
  gap: 0.55rem;
  align-items: flex-start;
}

.checklist li::before {
  content: "✓";
  color: var(--accent);
  font-weight: 800;
  line-height: 1.5;
}

.facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
  margin: 0.5rem 0 3rem;
}

.fact {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.9rem 1rem;
}

.fact strong {
  display: block;
  font-size: 1.15rem;
}

.fact span {
  color: var(--muted);
  font-size: 0.86rem;
}

.section {
  margin: 3rem 0;
}

.section-head {
  max-width: 44rem;
  margin-bottom: 1.4rem;
}

.section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.section p {
  color: var(--ink-soft);
  margin-top: 0;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  counter-reset: step;
}

.step {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.3rem;
}

.step::before {
  counter-increment: step;
  content: counter(step) ".";
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 800;
  margin-bottom: 0.7rem;
}

.step h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.step p {
  margin: 0;
  font-size: 0.92rem;
}

.notice {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  border-radius: 14px;
  padding: 0.95rem 1.1rem;
  font-size: 0.91rem;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink-soft);
}

.notice strong {
  color: var(--ink);
}

.notice.info {
  background: #f2f7ff;
  border-color: #cfdffb;
}

.notice.warn {
  background: var(--warn-soft);
  border-color: #f0d8a8;
  color: #6d4300;
}

.notice.success {
  background: var(--ok-soft);
  border-color: #bce7c9;
  color: #14532d;
}

.notice.error {
  background: var(--danger-soft);
  border-color: #f6c9c4;
  color: var(--danger);
}

.notice + .notice {
  margin-top: 0.8rem;
}

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 0.8rem 1.2rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
  transition:
    background 0.15s ease,
    transform 0.1s ease,
    border-color 0.15s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.22);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-dark);
}

.btn-secondary {
  background: var(--paper);
  border-color: var(--line);
  color: var(--ink);
}

.btn-secondary:hover:not(:disabled) {
  border-color: #b9c6d4;
  background: #f8fafc;
}

.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
  padding-inline: 0.6rem;
}

.btn-ghost:hover {
  color: var(--accent);
}

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 0.95rem 1.4rem;
  font-size: 1.02rem;
}

.link {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.link:hover {
  text-decoration: underline;
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(1.2rem, 3vw, 2rem);
}

.card + .card {
  margin-top: 1rem;
}

.card h1,
.card h2 {
  margin-top: 0;
  letter-spacing: -0.02em;
}

.test-shell {
  max-width: 760px;
  margin: 0 auto;
}

.test-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.8rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.progress {
  height: 8px;
  background: var(--line);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.progress > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #2aa79b);
  border-radius: 999px;
  transition: width 0.25s ease;
}

.question-category {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.question-prompt {
  font-size: clamp(1.2rem, 2.6vw, 1.5rem);
  line-height: 1.4;
  margin: 0 0 1.4rem;
  white-space: pre-line;
}

.options {
  display: grid;
  gap: 0.65rem;
  margin: 0 0 1.5rem;
  padding: 0;
  border: 0;
}

.option {
  position: relative;
  display: flex;
  gap: 0.8rem;
  align-items: center;
  border: 1px solid var(--line);
  background: #fbfcfd;
  border-radius: 13px;
  padding: 0.85rem 1rem;
  cursor: pointer;
  transition:
    border-color 0.15s ease,
    background 0.15s ease;
}

.option:hover {
  border-color: #a9bccd;
  background: #fff;
}

.option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.option-key {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: #fff;
  font-weight: 700;
  font-size: 0.86rem;
  color: var(--ink-soft);
}

.option:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.option:has(input:checked) .option-key {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.option input:focus-visible + .option-key {
  outline: 3px solid rgba(15, 118, 110, 0.35);
  outline-offset: 2px;
}

.test-actions {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.review-list {
  display: grid;
  gap: 0.7rem;
  margin: 1.2rem 0 1.5rem;
  padding: 0;
  list-style: none;
}

.review-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.8rem 1rem;
  background: #fbfcfd;
}

.review-item .review-text {
  font-size: 0.93rem;
}

.review-item .review-meta {
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 0.2rem;
}

.review-item.missing {
  border-color: #f0c9a8;
  background: #fff9f2;
}

.attempt-hero {
  text-align: center;
  padding: 1rem 0 0.5rem;
}

.big-code {
  display: inline-block;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  font-weight: 700;
  letter-spacing: 0.16em;
  background: var(--wash);
  border: 1px dashed #b9c6d4;
  border-radius: 12px;
  padding: 0.6rem 1rem;
  margin: 0.5rem 0;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin: 1.2rem 0;
}

.meta-box {
  background: var(--wash);
  border-radius: 12px;
  padding: 0.8rem 1rem;
}

.meta-box span {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
}

.meta-box strong {
  font-size: 1.05rem;
}

.lock-box {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
  background: var(--wash);
  border-radius: 14px;
  padding: 1rem 1.1rem;
  margin: 1rem 0;
}

.lock-icon {
  display: grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 1.3rem;
}

.pay-box {
  border-top: 1px solid var(--line);
  margin-top: 1.4rem;
  padding-top: 1.2rem;
}

.pay-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.8rem;
}

.pay-price {
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.consent {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  font-size: 0.86rem;
  color: var(--ink-soft);
  margin: 0.9rem 0 1.1rem;
}

.consent input {
  margin-top: 0.2rem;
  width: 1.05rem;
  height: 1.05rem;
  accent-color: var(--accent);
  flex: 0 0 auto;
}

.score-head {
  text-align: center;
  padding: 0.5rem 0 1.5rem;
}

.score-value {
  font-size: clamp(3rem, 10vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--accent);
}

.score-value small {
  font-size: 0.32em;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0;
}

.score-band {
  display: inline-block;
  margin: 0.8rem 0 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-weight: 700;
  font-size: 0.9rem;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin: 1.2rem 0;
}

.category {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.8rem 1rem;
}

.category-top {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  margin-bottom: 0.45rem;
}

.bar {
  height: 7px;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
}

.bar > span {
  display: block;
  height: 100%;
  background: var(--accent);
}

details {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.8rem 1rem;
  background: #fbfcfd;
  margin-top: 0.7rem;
}

details summary {
  cursor: pointer;
  font-weight: 650;
}

details p {
  margin: 0.7rem 0 0;
  font-size: 0.9rem;
}

.answer-line {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.3rem;
}

.legal h2 {
  margin-top: 2rem;
}

.legal h3 {
  margin: 1.4rem 0 0.3rem;
  font-size: 1rem;
}

.legal p,
.legal li {
  font-size: 0.93rem;
  color: var(--ink-soft);
}

.legal ul {
  padding-left: 1.2rem;
}

.form-row {
  display: grid;
  gap: 0.4rem;
  margin: 1rem 0;
}

.form-row label {
  font-weight: 650;
  font-size: 0.9rem;
}

input[type="text"] {
  font: inherit;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fff;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  max-width: 18rem;
}

input[type="text"]:focus {
  outline: 2px solid rgba(15, 118, 110, 0.35);
  border-color: var(--accent);
}

.spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.45);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner.dark {
  border-color: rgba(15, 118, 110, 0.25);
  border-top-color: var(--accent);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 0.84rem;
}

.center {
  text-align: center;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  padding: 1.5rem clamp(1rem, 4vw, 3.5rem);
  font-size: 0.86rem;
  color: var(--muted);
}

.site-footer > * {
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
}

.footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.4rem;
}

.footer-note {
  margin: 0.6rem auto 0;
  font-size: 0.8rem;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%);
  background: var(--ink);
  color: #fff;
  border-radius: 999px;
  padding: 0.6rem 1.1rem;
  font-size: 0.88rem;
  box-shadow: var(--shadow);
  z-index: 50;
}

.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;
}

@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .steps {
    grid-template-columns: 1fr;
  }
  .site-nav {
    display: none;
  }
}

@media (max-width: 560px) {
  .facts,
  .meta-grid,
  .category-grid {
    grid-template-columns: 1fr;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
  .option {
    padding: 0.8rem;
  }
  .test-actions .btn {
    flex: 1;
  }
  .lock-box {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }
  .site-header {
    padding: 0.8rem 1rem;
  }
}


/* Utility classes (kept inline-style free for a strict CSP) */
.mt-0-8 { margin-top: 0.8rem; }
.mt-1 { margin-top: 1rem; }
.mt-1-2 { margin-top: 1.2rem; }
.mt-1-5 { margin-top: 1.5rem; }
.mt-2 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 1rem; }
.m-0 { margin: 0; }
.justify-center { justify-content: center; }
.h3-small { font-size: 1.15rem; }
.w-0 { width: 0%; }
.w-5 { width: 5%; }
.w-10 { width: 10%; }
.w-15 { width: 15%; }
.w-20 { width: 20%; }
.w-25 { width: 25%; }
.w-30 { width: 30%; }
.w-35 { width: 35%; }
.w-40 { width: 40%; }
.w-45 { width: 45%; }
.w-50 { width: 50%; }
.w-55 { width: 55%; }
.w-60 { width: 60%; }
.w-65 { width: 65%; }
.w-70 { width: 70%; }
.w-75 { width: 75%; }
.w-80 { width: 80%; }
.w-85 { width: 85%; }
.w-90 { width: 90%; }
.w-95 { width: 95%; }
.w-100 { width: 100%; }