@font-face {
  font-family: "Inter";
  src: url("assets/fonts/Inter-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --blue: #0058be;
  --blue-dark: #004da6;
  --blue-soft: rgba(0, 88, 190, 0.08);
  --ink: #1b1b1d;
  --nav: #0f172a;
  --text: #45464d;
  --muted: #76777d;
  --line: #e4e2e4;
  --paper: #fcf8fa;
  --panel: #ffffff;
  --soft: #f0edef;
  --red: #ba1a1a;
  --green: #16a34a;
  --shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
  --max: 1232px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--blue);
}

button,
input {
  font: inherit;
}

sup {
  line-height: 0;
}

.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;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 65px;
  display: grid;
  grid-template-columns: 170px 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(252, 248, 250, 0.86);
  backdrop-filter: blur(6px);
}

.brand {
  color: var(--nav);
  font-size: 24px;
  line-height: 36px;
  font-weight: 800;
}

.nav-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  line-height: 22.5px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.signin {
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: 0;
  border-radius: 9999px;
  background: var(--blue);
  color: #fff;
  font-weight: 650;
  letter-spacing: 0;
  cursor: pointer;
  white-space: nowrap;
}

.button:hover {
  background: var(--blue-dark);
  color: #fff;
}

.button-small {
  min-height: 36px;
  padding: 0 20px;
  font-size: 14px;
  line-height: 20px;
}

.hero {
  width: min(var(--max), calc(100% - 48px));
  min-height: 658px;
  margin: 0 auto;
  padding: 67px 0 96px;
  display: grid;
  grid-template-columns: 584px 584px;
  gap: 64px;
  align-items: start;
}

.hero-copy {
  min-width: 0;
  padding-top: 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  margin: 0;
  padding: 4px 12px;
  border-radius: 9999px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 12px;
  line-height: 18px;
  font-weight: 750;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 16px 0 0;
  color: var(--ink);
  font-size: 60px;
  line-height: 60px;
  font-weight: 760;
  letter-spacing: 0;
}

.hero h1 span,
.section-heading h2 span,
.coverage-intro h2 span,
.guide-card h2 span,
.final-cta h2 span {
  color: var(--blue);
}

.hero-lead {
  max-width: 584px;
  margin: 24px 0 0;
  color: var(--ink);
  font-size: 18px;
  line-height: 28px;
  font-weight: 650;
}

.hero-lead strong {
  color: var(--blue);
  font-weight: 650;
}

.hero-body {
  max-width: 512px;
  margin: 16px 0 0;
  color: var(--text);
  font-size: 16px;
  line-height: 26px;
}

.hero-button {
  min-width: 386px;
  min-height: 60px;
  margin-top: 40px;
  padding: 0 32px;
  font-size: 18px;
  line-height: 28px;
}

.microcopy {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 16px;
}

.microcopy a,
.price a,
.guide-card a,
.course-card a,
.cookie-bar a,
.site-footer a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.study-card {
  position: relative;
  min-width: 0;
  min-height: 404px;
  margin-top: 79px;
  padding: 25px;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.study-card-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--blue);
}

.study-title {
  margin: 0 0 16px;
  color: var(--blue);
  font-size: 10.4px;
  line-height: 15.6px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.study-warning {
  margin: 0 0 16px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 10.4px;
  line-height: 15.6px;
}

.file-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  min-height: 54px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
  color: var(--ink);
  font-size: 14px;
}

.file-icon {
  font-size: 20px;
  line-height: 28px;
}

.file-row strong {
  overflow: hidden;
  font-weight: 650;
  line-height: 20px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-count {
  color: var(--green);
  font-size: 11.2px;
  font-weight: 760;
  line-height: 16.8px;
  white-space: nowrap;
}

.question-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.question-card {
  min-height: 79.5px;
  display: flex;
  align-items: center;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--paper);
  color: var(--ink);
  font-size: 14px;
  line-height: 22.75px;
}

.question-card p {
  margin: 0;
}

.blank {
  display: inline-block;
  width: 60px;
  height: 16.8px;
  margin: 0 4px -4px;
  border-bottom: 2px solid var(--blue);
  border-radius: 9999px;
  background: rgba(0, 88, 190, 0.08);
}

.blank-wide {
  width: 128px;
}

.study-foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 16px;
  padding-top: 8px;
  color: var(--muted);
  font-size: 10.4px;
  line-height: 15.6px;
}

.study-foot strong {
  color: var(--blue);
  font-weight: 750;
}

.stats-band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.stats-inner {
  width: min(var(--max), calc(100% - 48px));
  min-height: 138.8px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
  gap: 32px;
}

.stat {
  text-align: center;
}

.stat strong {
  display: block;
  color: var(--blue);
  font-size: 30px;
  line-height: 36px;
  font-weight: 760;
}

.stat span {
  display: block;
  max-width: 301px;
  margin: 4px auto 0;
  color: var(--muted);
  font-size: 10.4px;
  line-height: 16.8px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.problem-section {
  padding: 96px 24px 40px;
  background: #fff;
}

.retrieval-section {
  padding: 96px 24px 23px;
  background: var(--paper);
}

.section-shell {
  width: min(1024px, 100%);
  margin: 0 auto;
}

.section-heading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.section-heading h2,
.coverage-intro h2,
.course-card h2,
.guide-card h2,
.final-cta h2 {
  margin: 0;
  color: var(--ink);
  font-weight: 760;
  letter-spacing: 0;
}

.section-heading h2 {
  font-size: 48px;
  line-height: 48px;
}

.section-heading > p:not(.eyebrow) {
  max-width: 876px;
  margin: 8px 0 0;
  color: var(--text);
  font-size: 18px;
  line-height: 28px;
}

.comparison-grid {
  margin-top: 64px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.compare-card {
  min-width: 0;
  min-height: 258px;
  padding: 25px;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 4px 10px rgba(15, 23, 42, 0.05);
}

.compare-card.without {
  border: 1px solid rgba(186, 26, 26, 0.2);
}

.compare-card.with {
  border: 1px solid rgba(0, 88, 190, 0.2);
}

.retrieval-card {
  min-height: 238px;
}

.compare-card h3 {
  margin: 0 0 24px;
  font-size: 10.4px;
  line-height: 15.6px;
  font-weight: 760;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.without h3,
.without li span {
  color: var(--red);
}

.with h3,
.with li span {
  color: var(--blue);
}

.compare-card ul {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--text);
  font-size: 14px;
  line-height: 20px;
}

.compare-card li {
  display: grid;
  grid-template-columns: 12px 1fr;
  gap: 12px;
}

.compare-card li span {
  font-size: 18px;
  font-weight: 800;
  line-height: 18px;
}

.coverage-section {
  min-height: 488px;
  padding: 97px 24px 96px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.coverage-intro {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

.coverage-intro h2 {
  margin-top: 16px;
  font-size: 38px;
  line-height: 40px;
}

.coverage-intro p {
  max-width: 1024px;
  margin: 16px 0 0;
  color: var(--text);
  font-size: 16px;
  line-height: 24px;
}

.subject-grid {
  width: min(var(--max), calc(100% - 48px));
  margin: 48px auto 0;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.subject-grid a {
  min-height: 54px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  font-weight: 650;
  line-height: 20px;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.05);
}

.subject-grid a span {
  flex: 0 0 auto;
}

.course-section {
  padding: 56px 24px 46px;
  background: var(--paper);
}

.course-card {
  min-width: 0;
  max-width: 896px;
  min-height: 248px;
  margin: 0 auto;
  padding: 25px;
  border: 1px solid rgba(0, 88, 190, 0.2);
  border-radius: 12px;
  background: rgba(0, 88, 190, 0.05);
  text-align: center;
  box-shadow: var(--shadow);
}

.small-label {
  margin: 0;
  color: var(--blue);
  font-size: 10.4px;
  font-weight: 760;
  line-height: 15.6px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.course-card h2 {
  margin-top: 12px;
  font-size: 24px;
  line-height: 32px;
}

.course-card > p:not(.small-label) {
  margin: 12px 0 0;
  color: var(--text);
  font-size: 14px;
  line-height: 20px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 32px 0 0;
}

.chips span {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  padding: 5px 13px;
  border: 1px solid var(--line);
  border-radius: 9999px;
  background: #fff;
  color: var(--text);
  font-size: 11.2px;
  font-weight: 650;
  line-height: 16.8px;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.05);
}

.course-card a {
  display: inline-block;
  margin-top: 12px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 760;
  line-height: 20px;
  text-decoration: none;
}

.guide-section {
  min-height: 368px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 24px;
  background: var(--soft);
}

.guide-card {
  width: min(768px, 100%);
  min-width: 0;
  min-height: 240px;
  padding: 40px;
  border: 0;
  border-radius: 12px;
  background: #fff;
  text-align: center;
  box-shadow: 0 4px 10px rgba(15, 23, 42, 0.05);
}

.guide-card h2 {
  font-size: 18px;
  line-height: 28px;
  font-weight: 650;
}

.email-row {
  display: grid;
  grid-template-columns: 1fr 160px;
  align-items: end;
  gap: 12px;
  margin: 16px 0;
  padding-top: 8px;
}

.email-row input {
  min-height: 48px;
  width: 100%;
  padding: 0 25px;
  border: 1px solid var(--line);
  border-radius: 9999px;
  background: #fff;
  color: var(--ink);
  outline: none;
}

.email-row input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(0, 88, 190, 0.12);
}

.email-row input::placeholder {
  color: #6b7280;
}

.email-row .button {
  width: 100%;
  font-size: 16px;
  line-height: 24px;
}

.guide-card > p {
  margin: 0;
  color: var(--muted);
  font-size: 10.4px;
  line-height: 15.6px;
}

.final-cta {
  min-height: 520px;
  padding: 86px 24px;
  background: var(--paper);
  text-align: center;
}

.final-cta h2 {
  max-width: 896px;
  margin: 0 auto;
  font-size: 48px;
  line-height: 48px;
}

.final-cta p {
  margin: 24px 0 0;
  color: var(--text);
  font-size: 18px;
  line-height: 28px;
}

.final-button {
  min-width: 464px;
  min-height: 68px;
  margin-top: 40px;
  padding: 0 48px;
  font-size: 20px;
  line-height: 28px;
}

.benefits {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
  line-height: 16px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.final-cta .price {
  margin-top: 24px;
  color: var(--text);
  font-size: 14px;
  line-height: 20px;
}

.site-footer {
  min-height: 322px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding: 65px 24px 64px;
  border-top: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

.site-footer > div {
  min-width: 0;
}

.site-footer p {
  margin: 0;
  font-size: 11.2px;
  line-height: 18.2px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 16px 0;
}

.site-footer nav a {
  color: var(--text);
  font-size: 11.2px;
  font-weight: 650;
  line-height: 18.2px;
}

.site-footer .privacy-choice,
.site-footer .disclaimer {
  color: var(--muted);
}

.footer-right h2 {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 11.2px;
  font-weight: 760;
  line-height: 18.2px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-right p {
  opacity: 0.8;
}

.footer-right p + p {
  margin-top: 8px;
}

.cookie-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
  min-height: 67px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 16px 48px;
  background: var(--ink);
  color: #fff;
}

.cookie-bar.is-hidden {
  display: none;
}

.cookie-bar p {
  max-width: 672px;
  margin: 0;
  font-size: 12px;
  line-height: 16px;
}

.cookie-actions {
  display: flex;
  gap: 8px;
}

.cookie-actions button {
  min-height: 35px;
  padding: 0 17px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: transparent;
  color: #fff;
  font-size: 11.2px;
  font-weight: 760;
  line-height: 16.8px;
  cursor: pointer;
}

.cookie-actions button:last-child {
  border-color: var(--blue);
  background: var(--blue);
}

@media (max-width: 1279px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (max-width: 1040px) {
  .site-header {
    grid-template-columns: auto 1fr;
  }

  .nav-links,
  .signin {
    display: none;
  }

  .header-actions {
    justify-content: end;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 72px 0 80px;
  }

  .study-card {
    margin-top: 0;
  }

  .subject-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 760px) {
  .site-header {
    display: flex;
    justify-content: space-between;
    height: 61px;
    padding: 0 16px;
  }

  .brand {
    font-size: 21px;
  }

  .button-small {
    min-height: 36px;
    padding: 0 16px;
    font-size: 13px;
  }

  .hero,
  .stats-inner,
  .coverage-intro,
  .subject-grid {
    width: calc(100% - 36px);
  }

  .hero {
    padding: 56px 0 64px;
  }

  .hero h1 {
    font-size: 44px;
    line-height: 46px;
  }

  .hero-lead,
  .hero-body {
    font-size: 16px;
    line-height: 25px;
  }

  .hero-button,
  .final-button {
    width: 100%;
    min-width: 0;
    padding-inline: 18px;
    font-size: 16px;
    text-align: center;
    white-space: normal;
  }

  .study-card {
    padding: 25px 18px;
  }

  .file-row {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .file-count {
    grid-column: 2;
  }

  .stats-inner {
    grid-template-columns: 1fr 1fr;
    gap: 34px 18px;
    padding: 40px 0;
  }

  .problem-section,
  .retrieval-section,
  .coverage-section,
  .course-section,
  .guide-section,
  .final-cta {
    padding-left: 18px;
    padding-right: 18px;
  }

  .section-heading h2,
  .final-cta h2 {
    font-size: 36px;
    line-height: 38px;
  }

  .section-heading > p:not(.eyebrow) {
    font-size: 16px;
    line-height: 25px;
  }

  .comparison-grid,
  .email-row {
    grid-template-columns: 1fr;
  }

  .compare-card {
    min-height: 0;
  }

  .coverage-intro h2 {
    font-size: 32px;
    line-height: 36px;
  }

  .subject-grid {
    grid-template-columns: 1fr 1fr;
  }

  .course-card {
    padding: 28px 18px;
  }

  .course-card h2 {
    font-size: 23px;
    line-height: 30px;
  }

  .guide-card {
    padding: 40px 18px;
  }

  .final-cta {
    min-height: auto;
  }

  .benefits {
    gap: 14px 24px;
  }

  .site-footer {
    padding: 51px 18px 106px;
  }

  .cookie-bar {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px 16px;
  }

  .cookie-actions {
    justify-content: space-between;
  }
}

@media (max-width: 460px) {
  .button-small {
    padding: 0 13px;
  }

  .hero h1 {
    font-size: 42px;
    line-height: 44px;
  }

  .study-foot {
    flex-direction: column;
    gap: 8px;
  }

  .stats-inner,
  .subject-grid {
    grid-template-columns: 1fr;
  }

  .site-footer nav {
    flex-direction: column;
    gap: 12px;
  }
}