:root {
  --bg: #071018;
  --bg-elevated: #0d1a24;
  --ink: #e8f1f4;
  --muted: #8aa3b0;
  --line: rgba(125, 211, 192, 0.18);
  --accent: #3ecfac;
  --accent-2: #5bb8e8;
  --warn: #e8b86d;
  --danger: #f07178;
  --gradient: linear-gradient(135deg, #3ecfac 0%, #5bb8e8 100%);
  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Source Serif 4", Georgia, serif;
  --font-ui: "DM Sans", system-ui, sans-serif;
  --radius: 14px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

/* Below-fold sections: skip layout work until near viewport */
.article-related,
.faq,
.article-coffee,
.guide-grid,
.curriculum {
  content-visibility: auto;
  contain-intrinsic-size: auto 320px;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  z-index: 10060;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: var(--accent);
  color: #042f2e;
  font: 600 0.85rem/1.2 var(--font-ui);
  text-decoration: none;
  transition: top 0.15s ease;
}
.skip-link:focus {
  top: 0.75rem;
  outline: 2px solid #fff;
  outline-offset: 2px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-ui);
  color: var(--ink);
  background:
    radial-gradient(ellipse 90% 55% at 70% -10%, rgba(62, 207, 172, 0.16), transparent 55%),
    radial-gradient(ellipse 70% 45% at 10% 20%, rgba(91, 184, 232, 0.1), transparent 50%),
    linear-gradient(180deg, #050c12 0%, var(--bg) 40%, #08141c 100%);
  line-height: 1.6;
}

img {
  max-width: 100%;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: #7ae7cd;
}

.container {
  width: min(1100px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(7, 16, 24, 0.78);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 0;
}

.brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
}

.brand span {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.7rem 1.25rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

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

.btn-primary {
  background: var(--gradient);
  color: #042018;
  box-shadow: 0 10px 28px rgba(62, 207, 172, 0.25);
}

.btn-primary:hover {
  color: #02140f;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: rgba(62, 207, 172, 0.45);
  background: rgba(62, 207, 172, 0.08);
  color: var(--ink);
}

.btn-block {
  width: 100%;
}

.hero {
  position: relative;
  min-height: calc(100vh - 72px);
  display: grid;
  align-items: center;
  padding: 4.5rem 0 5rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(5, 12, 18, 0.55), rgba(5, 12, 18, 0.82)),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%233ecfac' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E"),
    radial-gradient(ellipse at 80% 30%, rgba(91, 184, 232, 0.22), transparent 45%),
    radial-gradient(ellipse at 20% 80%, rgba(62, 207, 172, 0.18), transparent 40%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 720px;
}

.eyebrow {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.5rem, 6vw, 4.1rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin: 0 0 1.1rem;
}

.hero-lead {
  font-family: var(--font-body);
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  color: var(--muted);
  max-width: 34em;
  margin: 0 0 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.section {
  padding: 4.5rem 0;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  letter-spacing: -0.03em;
  margin: 0 0 0.85rem;
}

.section-lead {
  font-family: var(--font-body);
  color: var(--muted);
  max-width: 38em;
  margin: 0 0 2rem;
  font-size: 1.08rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature {
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}

.feature h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 0 0 0.5rem;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.cta-band {
  margin: 1rem 0 4rem;
  padding: 2.5rem;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(62, 207, 172, 0.18), rgba(91, 184, 232, 0.14));
  border: 1px solid var(--line);
  text-align: center;
}

.cta-band h2 {
  font-family: var(--font-display);
  margin: 0 0 0.5rem;
}

.cta-band p {
  color: var(--muted);
  margin: 0 0 1.4rem;
  font-family: var(--font-body);
}

.legal-page h1,
.article-page h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  margin: 0 0 0.75rem;
}

.article-page {
  max-width: 42rem;
  padding: 2.5rem 0 4rem;
}

.article-page .article-lead {
  font-family: var(--font-body);
  font-size: 1.12rem;
  color: var(--muted);
  line-height: 1.6;
  margin: 0 0 1rem;
}

.article-page .article-note {
  font-size: 0.9rem;
  color: var(--muted);
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(13, 26, 36, 0.55);
  margin: 0 0 2rem;
}

.article-page h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 2rem 0 0.75rem;
}

.article-page h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin: 1.25rem 0 0.4rem;
}

.article-page p,
.article-page li {
  font-family: var(--font-body);
  color: var(--muted);
  line-height: 1.6;
}

.article-page ul,
.article-page ol {
  margin: 0.5rem 0 1rem;
  padding-left: 1.25rem;
}

.article-page li {
  margin: 0.35rem 0;
}

.article-cta {
  margin: 2.5rem 0 0;
  padding: 1.35rem 1.4rem;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(62, 207, 172, 0.08);
}

.article-cta h2 {
  margin-top: 0;
}

.article-related ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.article-related__hint {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.92rem;
  font-family: var(--font-body);
}

.article-coffee {
  margin: 2.5rem 0 0;
  padding: 1.25rem 1.35rem;
  border-radius: 16px;
  border: 1px solid rgba(125, 211, 192, 0.28);
  background: rgba(13, 26, 36, 0.65);
}

.article-coffee h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.article-coffee > p {
  margin: 0 0 1rem;
}

.article-coffee__legal {
  margin: 0.85rem 0 0 !important;
  font-size: 0.75rem !important;
  opacity: 0.85;
}

.article-copyright {
  margin: 2rem 0 0;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.45;
}

.site-footer__copy {
  margin: 0.75rem auto 0;
  text-align: center;
  font-size: 0.78rem;
  color: var(--muted);
  max-width: 1100px;
  padding: 0 1rem 1.25rem;
}

.guide-grid {
  display: grid;
  gap: 0.75rem;
  margin: 1.25rem 0 0;
}

.guide-grid a {
  display: block;
  padding: 0.9rem 1.05rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(13, 26, 36, 0.55);
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
}

.guide-grid a:hover {
  border-color: rgba(62, 207, 172, 0.45);
  color: var(--accent);
}

.guide-grid a span {
  display: block;
  margin-top: 0.25rem;
  font-weight: 400;
  font-size: 0.88rem;
  color: var(--muted);
  font-family: var(--font-body);
}

.crumb {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 1rem;
}

.crumb a {
  color: var(--accent);
}

/* Ebook donation offer */
.ce-ebook-offer {
  margin: 1.5rem 0;
  padding: 1.35rem 1.4rem;
  border-radius: 18px;
  border: 1px solid rgba(125, 211, 192, 0.32);
  background:
    linear-gradient(145deg, rgba(62, 207, 172, 0.12), rgba(13, 26, 36, 0.92) 45%, rgba(91, 184, 232, 0.08));
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.22);
}
.ce-ebook-offer__eyebrow {
  margin: 0 0 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.ce-ebook-offer__title {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  font-weight: 800;
  line-height: 1.25;
}
.ce-ebook-offer__text {
  margin: 0 0 0.85rem;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
  max-width: 40rem;
}
.ce-ebook-offer__perks {
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.35rem;
  font-size: 0.88rem;
  color: var(--ink);
}
.ce-ebook-offer__perks li {
  display: flex;
  gap: 0.45rem;
  align-items: flex-start;
}
.ce-ebook-offer__perks li::before {
  content: "→";
  color: var(--accent);
  font-weight: 700;
  flex: 0 0 auto;
}
.ce-ebook-offer__cta-label {
  margin: 0 0 0.45rem;
  font-size: 0.82rem;
  font-weight: 600;
  opacity: 0.9;
}
.ce-ebook-offer__row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.ce-ebook-offer__btn {
  appearance: none;
  border: 1px solid rgba(125, 211, 192, 0.4);
  background: rgba(62, 207, 172, 0.16);
  color: inherit;
  border-radius: 999px;
  padding: 0.55rem 1rem;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  line-height: 1.2;
}
.ce-ebook-offer__btn:hover {
  background: rgba(62, 207, 172, 0.28);
}
.ce-ebook-offer__btn:disabled {
  opacity: 0.55;
  cursor: wait;
}
.ce-ebook-offer__btn--primary {
  background: var(--gradient);
  border-color: transparent;
  color: #041018;
}
.ce-ebook-offer__btn--primary:hover {
  filter: brightness(1.06);
  background: var(--gradient);
}
.ce-ebook-offer__msg {
  margin: 0.5rem 0 0;
  font-size: 0.78rem;
  color: var(--danger);
  min-height: 1em;
}
.ce-ebook-offer__fine {
  margin: 0.65rem 0 0;
  font-size: 0.75rem;
  color: var(--muted);
  opacity: 0.9;
}
@media (max-width: 560px) {
  .ce-ebook-offer {
    padding: 1.1rem 1rem;
  }
  .ce-ebook-offer__btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

.auth-shell {
  min-height: calc(100vh - 72px);
  display: grid;
  place-items: center;
  padding: 3rem 0;
}

.auth-panel {
  width: min(440px, 100%);
  background: rgba(13, 26, 36, 0.88);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.auth-panel h1 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  margin: 0 0 0.35rem;
}

.auth-panel .sub {
  color: var(--muted);
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
}

.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: #c5d7e0;
}

.field input {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(5, 12, 18, 0.75);
  color: var(--ink);
  border-radius: 12px;
  padding: 0.8rem 0.95rem;
  font: inherit;
}

.field input:focus {
  outline: 2px solid rgba(62, 207, 172, 0.45);
  border-color: var(--accent);
}

.form-msg {
  display: none;
  margin-bottom: 1rem;
  padding: 0.75rem 0.9rem;
  border-radius: 12px;
  font-size: 0.9rem;
}

.form-msg.show {
  display: block;
}

.form-msg.error {
  background: rgba(240, 113, 120, 0.12);
  border: 1px solid rgba(240, 113, 120, 0.35);
  color: #ffc0c4;
}

.form-msg.ok,
.form-msg.success {
  background: rgba(62, 207, 172, 0.12);
  border: 1px solid rgba(62, 207, 172, 0.35);
  color: #b8f5e4;
}

.auth-foot {
  margin-top: 1.25rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0 3rem;
  margin-top: 2rem;
}

.footer-grid {
  display: grid;
  gap: 1.5rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 800;
  margin: 0 0 0.5rem;
}

.legal-box {
  font-size: 0.86rem;
  color: var(--muted);
  background: rgba(13, 26, 36, 0.6);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}

.legal-box strong {
  color: var(--warn);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
  font-size: 0.9rem;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent);
}

.disclaimer-strip {
  text-align: center;
  font-size: 0.82rem;
  color: rgba(232, 241, 244, 0.82);
  background: rgba(8, 18, 26, 0.92);
  border-bottom: 1px solid var(--line);
  padding: 0.65rem 1rem;
}

.disclaimer-strip strong {
  color: var(--warn);
}

.edu-hero {
  padding: 2.5rem 0 1rem;
}

.edu-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  letter-spacing: -0.03em;
  margin: 0 0 0.6rem;
}

.edu-grid {
  display: grid;
  gap: 1.25rem;
  padding-bottom: 3rem;
}

.edu-block {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 0.5rem;
}

.edu-block h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 0 0 0.6rem;
}

.edu-block p,
.edu-block li {
  color: var(--muted);
  font-family: var(--font-body);
}

.edu-block ul {
  padding-left: 1.15rem;
}

.affiliate-note {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  border: 1px solid rgba(232, 184, 109, 0.28);
  background: rgba(232, 184, 109, 0.08);
  font-size: 0.9rem;
  color: #e8d7b5;
}

.affiliate-note a {
  color: var(--accent);
  font-weight: 600;
  font-family: var(--font-ui);
}

.user-chip {
  font-size: 0.88rem;
  color: var(--muted);
}

.legal-page {
  padding: 3rem 0 4rem;
  max-width: 720px;
}

.legal-page h1 {
  font-family: var(--font-display);
  margin-bottom: 1rem;
}

.legal-page h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-top: 2rem;
}

.legal-page p,
.legal-page li {
  color: var(--muted);
  font-family: var(--font-body);
}

@media (max-width: 860px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  html, body {
    overflow-x: clip;
  }

  .container {
    width: calc(100% - 1.5rem);
  }

  .site-header .nav {
    flex-wrap: wrap;
    row-gap: 0.45rem;
    align-items: center;
  }

  .site-header .brand {
    font-size: 1.15rem;
  }

  .site-header .nav-actions {
    width: 100%;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  .nav-actions .btn {
    padding: 0.5rem 0.8rem;
    font-size: 0.84rem;
  }

  .hero {
    padding: 2.25rem 0 2rem;
  }

  .hero h1 {
    font-size: clamp(1.65rem, 7vw, 2.1rem);
    line-height: 1.15;
  }

  .hero-lead {
    font-size: 1rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
  }

  .hero-cta .btn {
    width: 100%;
    justify-content: center;
  }

  .cta-band {
    padding: 1.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn:hover {
    transform: none;
  }
}