/* ── Fonts ────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Base ─────────────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
  background-color: var(--surface-canvas);
  color: var(--color-ink-black);
  font-family: var(--font-primary);
  font-size: var(--text-body-sm);
  line-height: var(--leading-body-sm);
  letter-spacing: var(--tracking-body-sm);
  font-weight: var(--font-weight-regular);
  -webkit-font-smoothing: antialiased;
}

body { overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
strong { font-weight: var(--font-weight-medium); }

/* ── Nav ──────────────────────────────────────────────────── */
.blog-nav {
  background-color: var(--surface-canvas);
  border-bottom: 1px solid var(--color-ink-black);
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.blog-nav-inner {
  max-width: var(--page-max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-24);
  display: flex;
  align-items: center;
  gap: var(--spacing-24);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  color: var(--color-ink-black);
  flex-shrink: 0;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-nav);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.logo-text {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--tracking-body-sm);
}

.blog-nav-links {
  display: flex;
  gap: var(--spacing-24);
  flex: 1;
  justify-content: center;
}

.blog-nav-link {
  font-size: var(--text-body-sm);
  letter-spacing: var(--tracking-body-sm);
  color: var(--color-ash-gray);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.blog-nav-link:hover,
.blog-nav-link.active {
  color: var(--color-ink-black);
  border-bottom-color: var(--color-ink-black);
}

.btn-back {
  flex-shrink: 0;
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-caption);
  color: var(--color-ink-black);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-buttons);
  padding: 6px 14px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.btn-back:hover {
  background-color: var(--color-ink-black);
  color: var(--color-paper-white);
}

/* ── Article Hero ─────────────────────────────────────────── */
.article-hero {
  background-color: var(--surface-fog-card);
  border-bottom: 1px solid var(--color-ink-black);
  padding: var(--spacing-96) var(--spacing-24);
}

.article-hero-inner {
  max-width: 780px;
  margin: 0 auto;
}

.article-meta-top {
  display: flex;
  gap: var(--spacing-6);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-24);
}

.meta-chip {
  display: inline-block;
  font-size: var(--text-caption);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.06em;
  color: var(--color-ink-black);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-buttons);
  padding: 4px 12px;
  text-transform: uppercase;
}

.meta-chip-yellow {
  background-color: var(--color-highlighter-yellow);
  border-color: var(--color-ink-black);
}

.article-heading {
  font-size: var(--text-heading);
  font-weight: var(--font-weight-medium);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink-black);
  margin-bottom: var(--spacing-24);
}

.article-subheading {
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-regular);
  line-height: var(--leading-subheading);
  letter-spacing: var(--tracking-subheading);
  color: var(--color-ash-gray);
  margin-bottom: var(--spacing-36);
  max-width: 640px;
}

.article-byline {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.06em;
  color: var(--color-ash-gray);
  text-transform: uppercase;
}

.byline-sep { opacity: 0.4; }

/* ── Offer Banner ─────────────────────────────────────────── */
.offer-banner-wrap {
  background-color: var(--surface-canvas);
  border-bottom: 1px solid var(--color-ink-black);
  padding: var(--section-gap) var(--spacing-24);
}

.offer-banner {
  max-width: 780px;
  margin: 0 auto;
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-cards);
  padding: var(--spacing-36);
  background-color: var(--surface-fog-card);
}

.offer-eyebrow {
  display: block;
  font-size: var(--text-caption);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.07em;
  color: var(--color-ink-black);
  text-transform: uppercase;
  margin-bottom: var(--spacing-12);
}

.offer-headline {
  font-size: var(--text-heading-sm);
  font-weight: var(--font-weight-medium);
  line-height: var(--leading-heading-sm);
  letter-spacing: var(--tracking-heading-sm);
  color: var(--color-ink-black);
  margin-bottom: var(--spacing-12);
}

.offer-body {
  font-size: var(--text-body-sm);
  letter-spacing: var(--tracking-body-sm);
  line-height: var(--leading-body-sm);
  color: var(--color-ash-gray);
  margin-bottom: var(--spacing-36);
}

/* ── Promo Code Reveal ────────────────────────────────────── */
.code-reveal-block {
  margin-bottom: var(--spacing-36);
}

.code-reveal-label {
  display: block;
  font-size: var(--text-caption);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-ink-black);
  margin-bottom: var(--spacing-6);
}

.code-reveal-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-6);
}

.code-box {
  flex: 1;
  min-width: 200px;
  background-color: var(--surface-canvas);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-inputs);
  padding: 12px var(--spacing-24);
  font-family: var(--font-mono);
  font-size: var(--text-body-sm);
  letter-spacing: 0.12em;
  font-weight: 500;
  color: var(--color-ink-black);
  min-height: 46px;
  display: flex;
  align-items: center;
  user-select: none;
}

.code-dots {
  color: var(--color-ash-gray);
  letter-spacing: 0.05em;
  font-size: 10px;
}

.code-value {
  color: var(--color-ink-black);
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  font-size: var(--text-body-sm);
  font-weight: 500;
  user-select: text;
}

.btn-reveal {
  flex-shrink: 0;
  height: 46px;
  background-color: var(--color-highlighter-yellow);
  color: var(--color-ink-black);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-buttons);
  padding: 0 var(--spacing-24);
  font-family: var(--font-primary);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.07em;
  cursor: pointer;
  transition: opacity 0.15s ease;
  white-space: nowrap;
}

.btn-reveal:hover { opacity: 0.85; }

.btn-copy {
  flex-shrink: 0;
  height: 46px;
  background-color: var(--surface-canvas);
  color: var(--color-ink-black);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-buttons);
  padding: 0 var(--spacing-24);
  font-family: var(--font-primary);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.07em;
  cursor: pointer;
  display: none;
  align-items: center;
  gap: 6px;
  transition: background-color 0.2s ease;
}

.btn-copy:hover { background-color: var(--surface-fog-card); }

.code-hint {
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-caption);
  color: var(--color-ash-gray);
  line-height: var(--leading-caption);
}

/* ── Claim Button ─────────────────────────────────────────── */
.claim-block {
  margin-top: var(--spacing-12);
}

.btn-claim {
  display: inline-block;
  background-color: var(--color-ink-black);
  color: var(--color-paper-white);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-buttons);
  padding: 12px var(--spacing-36);
  font-family: var(--font-primary);
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--tracking-body-sm);
  cursor: pointer;
  transition: opacity 0.15s ease;
  margin-bottom: var(--spacing-6);
}

.btn-claim:hover { opacity: 0.8; }

.btn-claim-live {
  background-color: var(--color-highlighter-yellow);
  color: var(--color-ink-black);
  border-color: var(--color-ink-black);
}

.btn-claim-live:hover { opacity: 0.88; }

.claim-note {
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-caption);
  color: var(--color-ash-gray);
  margin-top: var(--spacing-6);
}

/* ── Article Body ─────────────────────────────────────────── */
.article-body-wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: var(--section-gap) var(--spacing-24);
}

/* Disclaimer */
.disclaimer-box {
  background-color: #fffde7;
  border: 1px solid var(--color-ink-black);
  border-left: 4px solid var(--color-highlighter-yellow);
  border-radius: var(--radius-cards);
  padding: var(--spacing-24);
  margin-bottom: var(--spacing-48);
  font-size: var(--text-body-sm);
  letter-spacing: var(--tracking-body-sm);
  line-height: var(--leading-body-sm);
  color: var(--color-ink-black);
}

/* Sections */
.article-section {
  margin-bottom: var(--spacing-48);
}

.article-section h2 {
  font-size: var(--text-heading-sm);
  font-weight: var(--font-weight-medium);
  line-height: var(--leading-heading-sm);
  letter-spacing: var(--tracking-heading-sm);
  color: var(--color-ink-black);
  margin-bottom: var(--spacing-24);
  padding-bottom: var(--spacing-12);
  border-bottom: 1px solid var(--color-ink-black);
}

.article-section p {
  font-size: var(--text-body-sm);
  letter-spacing: var(--tracking-body-sm);
  line-height: var(--leading-body-sm);
  color: var(--color-ash-gray);
  margin-bottom: var(--spacing-12);
}

.article-section p:last-child { margin-bottom: 0; }

.article-section ul,
.article-section ol {
  padding-left: var(--spacing-24);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-12);
}

.article-section li {
  font-size: var(--text-body-sm);
  letter-spacing: var(--tracking-body-sm);
  line-height: var(--leading-body-sm);
  color: var(--color-ash-gray);
}

.article-section li strong {
  color: var(--color-ink-black);
}

.note-text {
  font-size: var(--text-caption) !important;
  letter-spacing: var(--tracking-caption) !important;
  background-color: var(--surface-fog-card);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-inputs);
  padding: var(--spacing-12) var(--spacing-24) !important;
  color: var(--color-ink-black) !important;
  margin-top: var(--spacing-12);
}

/* Short Banner */
.short-banner {
  background-color: var(--color-ink-black);
  color: var(--color-paper-white);
  border-radius: var(--radius-cards);
  padding: var(--spacing-24) var(--spacing-36);
}

.short-banner p {
  font-size: var(--text-body-sm) !important;
  letter-spacing: var(--tracking-body-sm) !important;
  line-height: var(--leading-body-sm) !important;
  color: var(--color-paper-white) !important;
  margin: 0 !important;
}

.short-banner strong { color: var(--color-highlighter-yellow); }

/* ── Exam Table ───────────────────────────────────────────── */
.exam-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-cards);
  overflow: hidden;
}

.exam-table tr {
  border-bottom: 1px solid var(--color-ink-black);
}

.exam-table tr:last-child {
  border-bottom: none;
}

.exam-table tr:nth-child(even) td {
  background-color: var(--surface-fog-card);
}

.exam-label {
  font-size: var(--text-caption);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ash-gray);
  padding: var(--spacing-12) var(--spacing-24);
  width: 180px;
  vertical-align: top;
  border-right: 1px solid var(--color-ink-black);
}

.exam-value {
  font-size: var(--text-body-sm);
  letter-spacing: var(--tracking-body-sm);
  color: var(--color-ink-black);
  padding: var(--spacing-12) var(--spacing-24);
  vertical-align: top;
}

.exam-highlight {
  font-family: var(--font-mono);
  font-size: var(--text-heading-sm);
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--color-ink-black);
}

.exam-note {
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-caption);
  color: var(--color-ash-gray);
}

.exam-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  padding-top: 10px;
  padding-bottom: 10px;
}

.etag {
  display: inline-block;
  font-size: 11px;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.04em;
  color: var(--color-ink-black);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-buttons);
  padding: 2px 10px;
}

/* ── Domain List ──────────────────────────────────────────── */
.domain-list {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-cards);
  overflow: hidden;
}

.domain-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-24);
  padding: var(--spacing-24);
  border-bottom: 1px solid var(--color-ink-black);
  transition: background-color 0.15s ease;
}

.domain-item:last-child {
  border-bottom: none;
}

.domain-item:hover {
  background-color: var(--surface-fog-card);
}

.domain-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-nav);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 500;
  letter-spacing: 0;
  color: var(--color-ink-black);
  background-color: var(--surface-fog-card);
}

.domain-body {
  flex: 1;
}

.domain-title {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--tracking-body-sm);
  color: var(--color-ink-black);
  margin-bottom: var(--spacing-6);
}

.domain-desc {
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-caption);
  line-height: var(--leading-caption);
  color: var(--color-ash-gray);
}

/* ── Who Grid ─────────────────────────────────────────────── */
.who-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-12);
}

.who-card {
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-cards);
  padding: var(--spacing-24);
  background-color: var(--surface-fog-card);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
  transition: transform 0.15s ease;
}

.who-card:hover {
  transform: translateY(-2px);
}

.who-icon {
  font-size: 22px;
  margin-bottom: var(--spacing-6);
}

.who-card h4 {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--tracking-body-sm);
  color: var(--color-ink-black);
}

.who-card p {
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-caption);
  line-height: var(--leading-caption);
  color: var(--color-ash-gray);
}

/* ── What Makes It Different ──────────────────────────────── */
.diff-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.diff-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-24);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-cards);
  padding: var(--spacing-24);
  background-color: var(--surface-canvas);
}

.diff-badge {
  flex-shrink: 0;
  display: inline-block;
  font-size: 11px;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-ink-black);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-buttons);
  padding: 4px 12px;
  white-space: nowrap;
  align-self: center;
  min-width: 180px;
  text-align: center;
}

.diff-badge-yellow {
  background-color: var(--color-highlighter-yellow);
}

.diff-item p {
  font-size: var(--text-body-sm);
  letter-spacing: var(--tracking-body-sm);
  line-height: var(--leading-body-sm);
  color: var(--color-ash-gray);
  margin: 0;
}

/* ── Footer ───────────────────────────────────────────────── */
.blog-footer {
  background-color: var(--color-ink-black);
  color: var(--color-paper-white);
  border-top: 1px solid var(--color-ink-black);
  padding: var(--spacing-48) var(--spacing-24);
}

.blog-footer-inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.blog-footer .logo { color: var(--color-paper-white); }
.blog-footer .logo-icon {
  border-color: rgba(255,255,255,0.3);
  color: var(--color-paper-white);
}
.blog-footer .logo-text { color: var(--color-paper-white); }

.footer-note {
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-caption);
  line-height: var(--leading-caption);
  color: var(--color-ash-gray);
  max-width: 680px;
}

.footer-copy {
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-caption);
  color: var(--color-ash-gray);
}

/* ── Responsive ───────────────────────────────────────────── */
/* Checkbox Hack Toggle Styles */
.nav-toggle-cb {
  display: none !important;
}

.nav-toggle-btn {
  display: none;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-nav);
  color: var(--color-ink-black);
  z-index: 2001;
  transition: all 0.15s ease;
}

.nav-toggle-btn:hover {
  background-color: var(--surface-fog-card);
}

.nav-toggle-cb:checked ~ .nav-toggle-btn {
  background-color: var(--color-ink-black);
  color: var(--color-paper-white);
  border-color: var(--color-ink-black);
}

.nav-toggle-cb:checked ~ .nav-toggle-btn .menu-open-icon {
  display: none !important;
}

.nav-toggle-cb:checked ~ .nav-toggle-btn .menu-close-icon {
  display: block !important;
}

@media (max-width: 768px) {
  .nav-toggle-btn {
    display: flex;
    order: 3;
  }

  .blog-nav {
    height: 64px !important;
  }

  .blog-nav-inner {
    height: 100% !important;
    flex-direction: row !important;
    justify-content: space-between !important;
    align-items: center !important;
    padding: 0 var(--spacing-16) !important;
    gap: var(--spacing-12) !important;
    flex-wrap: nowrap !important;
  }

  .blog-nav-links {
    position: fixed !important;
    top: 0 !important;
    right: -300px !important;
    width: 280px !important;
    height: 100vh !important;
    background-color: var(--surface-canvas) !important;
    border-left: 1px solid var(--color-ink-black) !important;
    flex-direction: column !important;
    justify-content: flex-start !important;
    align-items: stretch !important;
    padding: 80px 24px 24px 24px !important;
    gap: 8px !important;
    z-index: 2000 !important;
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1) !important;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.08) !important;
    margin: 0 !important;
  }

  .nav-toggle-cb:checked ~ .blog-nav-links {
    transform: translateX(-300px) !important;
  }

  .blog-nav-link {
    font-size: 15px !important;
    padding: 12px 16px !important;
    border-bottom: none !important;
    border-left: 3px solid transparent !important;
    width: 100% !important;
    display: block !important;
    color: var(--color-ash-gray) !important;
    transition: all 0.15s ease;
    text-align: left !important;
    white-space: normal !important;
  }

  .blog-nav-link:hover,
  .blog-nav-link.active {
    border-left-color: var(--color-ink-black) !important;
    background-color: var(--surface-fog-card) !important;
    color: var(--color-ink-black) !important;
  }

  .btn-back {
    font-size: 11px !important;
    padding: 4px 10px !important;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .article-heading { font-size: 32px; }
  .article-hero { padding: var(--spacing-48) var(--spacing-24); }
  .offer-banner { padding: var(--spacing-24); }
  .offer-headline { font-size: var(--text-body-sm); }
  .code-box { min-width: 140px; }
  .article-body-wrap { padding: var(--spacing-48) var(--spacing-24); }
  .who-grid { grid-template-columns: 1fr 1fr; }
  .diff-item { flex-direction: column; gap: var(--spacing-12); }
  .diff-badge { min-width: unset; align-self: flex-start; }
  .exam-label { width: 120px; }
}