:root {
  --paper: #f7f5ef;
  --paper-soft: #fbfaf6;
  --ink: #171717;
  --muted: #5b626a;
  --line: #dedbd1;
  --panel: #ffffff;
  --green: #245c45;
  --green-2: #dbe8df;
  --blue: #244d8f;
  --amber: #91631d;
  --shadow: 0 24px 70px rgba(42, 38, 29, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, Arial, sans-serif;
  margin: 0;
}

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

.site-header {
  align-items: center;
  background: rgba(247, 245, 239, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 24px;
  justify-content: space-between;
  padding: 16px clamp(18px, 4vw, 58px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  align-items: center;
  display: inline-flex;
  font-weight: 800;
  gap: 10px;
  white-space: nowrap;
}

.brand-mark {
  align-items: center;
  background: var(--ink);
  border-radius: 5px;
  color: white;
  display: inline-flex;
  font-size: 12px;
  height: 34px;
  justify-content: center;
  width: 42px;
}

.nav {
  display: flex;
  gap: 24px;
}

.nav a,
.header-link {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.header-link {
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--ink);
  padding: 10px 14px;
}

.hero {
  align-items: center;
  display: grid;
  gap: 56px;
  grid-template-columns: minmax(0, 1fr) minmax(390px, 0.9fr);
  margin: 0 auto;
  max-width: 1220px;
  min-height: calc(100vh - 68px);
  padding: 74px clamp(18px, 4vw, 34px) 58px;
}

.eyebrow {
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 16px;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2 {
  font-family: "Source Serif 4", Georgia, serif;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(48px, 7.4vw, 86px);
  line-height: 0.92;
  margin-bottom: 28px;
  max-width: 850px;
}

h2 {
  font-size: clamp(32px, 4.2vw, 54px);
  line-height: 1;
  margin-bottom: 18px;
}

h3 {
  font-size: 20px;
  line-height: 1.25;
  margin-bottom: 10px;
}

p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.72;
}

.hero-text {
  font-size: 19px;
  max-width: 680px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  align-items: center;
  border-radius: 5px;
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
}

.button.primary {
  background: var(--ink);
  color: white;
}

.button.secondary {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
}

.hero-system {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 7px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.system-top {
  align-items: center;
  background: #151515;
  color: white;
  display: flex;
  justify-content: space-between;
  padding: 14px 18px;
}

.system-top span {
  color: #b9beb8;
  font-size: 13px;
  font-weight: 700;
}

.query-box,
.result-card,
.metadata-strip {
  margin: 16px;
}

.query-box {
  background: #f4f5f1;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 16px;
}

.query-label,
.tag {
  color: var(--green);
  display: block;
  font-size: 12px;
  font-weight: 800;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.query-box p,
.result-card p {
  margin-bottom: 0;
}

.result-card {
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: flex;
  gap: 20px;
  justify-content: space-between;
  padding: 18px;
}

.result-card.active {
  border-color: #8eaa94;
  box-shadow: inset 4px 0 0 var(--green);
}

.result-card h2 {
  font-family: Inter, Arial, sans-serif;
  font-size: 20px;
  margin-bottom: 5px;
}

.tag.muted,
.score.muted {
  color: var(--muted);
}

.score {
  align-items: center;
  background: var(--green-2);
  border-radius: 50%;
  color: var(--green);
  display: inline-flex;
  flex: 0 0 auto;
  font-weight: 900;
  height: 48px;
  justify-content: center;
  width: 48px;
}

.metadata-strip {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, 1fr);
  padding-top: 16px;
}

.metadata-strip span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.thesis {
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  margin: 0 auto;
  max-width: 1220px;
  padding: 38px clamp(18px, 4vw, 34px);
}

.thesis p {
  color: var(--ink);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(26px, 3.5vw, 40px);
  line-height: 1.15;
  margin-bottom: 0;
  max-width: 1040px;
}

.section {
  margin: 0 auto;
  max-width: 1220px;
  padding: 82px clamp(18px, 4vw, 34px);
}

.section-heading {
  max-width: 780px;
}

.section-heading.compact {
  max-width: 680px;
}

.index-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 34px;
}

.index-grid article,
.case-list article {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 24px;
}

.index-grid span {
  color: var(--amber);
  display: block;
  font-size: 12px;
  font-weight: 900;
  margin-bottom: 36px;
}

.platform,
.research,
.contact {
  align-items: start;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 48px;
  grid-template-columns: 0.9fr 1.1fr;
}

.architecture-card {
  background: #151515;
  border-radius: 7px;
  color: white;
  padding: 8px;
}

.flow-row {
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  display: grid;
  gap: 18px;
  grid-template-columns: 130px 1fr;
  padding: 18px;
}

.flow-row:last-child {
  border-bottom: 0;
}

.flow-row strong {
  color: #f6f0df;
}

.flow-row span {
  color: #c5c8c2;
  line-height: 1.55;
}

.table-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 7px;
  margin-top: 34px;
  overflow: hidden;
}

.table-row {
  display: grid;
  grid-template-columns: 0.7fr 1.4fr 1fr;
}

.table-row span {
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  padding: 17px 18px;
}

.table-row span:first-child {
  color: var(--ink);
  font-weight: 800;
}

.table-row.head {
  background: #ebe8dd;
}

.table-row.head span {
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.case-list {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 34px;
}

.research-notes {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 28px;
}

.research-notes ul {
  color: var(--ink);
  line-height: 1.7;
  margin: 20px 0 0;
  padding-left: 20px;
}

.research-notes li {
  margin-bottom: 10px;
}

.contact {
  background: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: 7px;
  margin-bottom: 72px;
}

.contact-form {
  background: white;
  border: 1px solid var(--line);
  border-radius: 7px;
  display: grid;
  gap: 16px;
  padding: 22px;
}

.form-note {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
  margin: -2px 0 0;
}

label {
  color: var(--ink);
  display: grid;
  font-size: 14px;
  font-weight: 800;
  gap: 8px;
}

input,
select,
textarea {
  background: white;
  border: 1px solid #cbc7bc;
  border-radius: 5px;
  color: var(--ink);
  font: inherit;
  padding: 13px 14px;
  width: 100%;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--green);
  outline: 3px solid rgba(36, 92, 69, 0.14);
}

.site-footer {
  align-items: flex-start;
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: grid;
  gap: 18px;
  grid-template-columns: 0.8fr 1.5fr 0.6fr;
  padding: 24px clamp(18px, 4vw, 58px);
}

.thank-you-page {
  align-items: center;
  display: flex;
  min-height: 100vh;
  padding: 24px;
}

.thank-you-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 7px;
  box-shadow: var(--shadow);
  margin: 0 auto;
  max-width: 720px;
  padding: clamp(32px, 6vw, 64px);
}

.thank-you-card h1 {
  font-size: clamp(44px, 7vw, 70px);
}

.thank-you-card .button {
  margin-top: 18px;
}

.site-footer div {
  display: grid;
  gap: 7px;
}

.site-footer strong {
  color: var(--ink);
  font-weight: 900;
}

.site-footer span,
.site-footer a {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.site-footer > span:last-child {
  border-top: 1px solid var(--line);
  grid-column: 1 / -1;
  padding-top: 16px;
}

@media (max-width: 960px) {
  .nav {
    display: none;
  }

  .hero,
  .platform,
  .research,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .index-grid,
  .case-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .brand span:last-child {
    display: none;
  }

  .header-link {
    padding-inline: 10px;
  }

  .hero,
  .section {
    padding: 54px 16px;
  }

  h1 {
    font-size: 46px;
  }

  .metadata-strip,
  .index-grid,
  .case-list,
  .table-row {
    grid-template-columns: 1fr;
  }

  .flow-row {
    grid-template-columns: 1fr;
  }

  .table-row span {
    border-bottom: 0;
    padding: 10px 16px;
  }

  .table-row {
    border-bottom: 1px solid var(--line);
    padding: 8px 0;
  }

  .contact {
    margin-inline: 16px;
  }

  .site-footer {
    align-items: flex-start;
    grid-template-columns: 1fr;
  }

  .site-footer > span:last-child {
    grid-column: auto;
  }
}