/* ============================================================
   GuTong — style.css
   Light theme: warm cream background, near-black text,
   purple-magenta accent. Solid hex colors only (no text
   transparency). body font-size is explicitly 16px.
   ============================================================ */

:root {
  --cream: #F7F5F0;
  --cream-deep: #EFEBE2;
  --paper: #FFFFFF;
  --ink: #1A1A1A;
  --ink-soft: #4A4657;
  --violet: #7C3AED;
  --violet-deep: #6D28D9;
  --violet-soft: #8B5CF6;
  --magenta: #C026D3;
  --lavender: #F0EAFD;
  --night: #17102B;
  --night-soft: #241A3F;
  --line: #E2DCCF;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background-color: var(--cream);
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-weight: 600;
  font-size: 16px;
  padding: 14px 26px;
  border-radius: 8px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn--primary {
  background-color: var(--violet);
  color: var(--paper);
}

.btn--primary:hover {
  background-color: var(--violet-deep);
  transform: translateY(-2px);
}

.btn--cream {
  background-color: var(--paper);
  color: var(--violet-deep);
}

.btn--cream:hover {
  background-color: var(--cream);
  transform: translateY(-2px);
}

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

.btn--ghost:hover {
  background-color: var(--paper);
  color: var(--violet-deep);
}

/* ---------- Section tag ---------- */
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--violet-deep);
  margin-bottom: 16px;
}

.section-tag--dark {
  color: var(--magenta);
}

/* ---------- Navigation (class selector, never bare nav) ---------- */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: var(--cream);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.2s ease;
}

.main-nav.scrolled {
  box-shadow: 0 8px 24px rgba(26, 26, 26, 0.08);
}

.main-nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--violet), var(--magenta));
  color: var(--paper);
  font-size: 20px;
  font-weight: 800;
}

.brand__name {
  font-size: 20px;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.brand--inverse .brand__name {
  color: var(--paper);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-weight: 600;
  color: var(--ink-soft);
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--violet-deep);
}

.nav-links__cta .btn {
  padding: 11px 20px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle__bar {
  display: block;
  width: 26px;
  height: 3px;
  border-radius: 2px;
  background-color: var(--ink);
}

/* ---------- Slanted hero ---------- */
.slant-hero {
  background: linear-gradient(135deg, var(--violet-deep) 0%, var(--violet) 45%, var(--magenta) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
  color: var(--paper);
  padding: 150px 0 120px;
}

.slant-hero__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cream);
  margin-bottom: 20px;
}

.slant-hero__title {
  font-size: 52px;
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.slant-hero__lead {
  font-size: 19px;
  line-height: 1.6;
  color: var(--cream);
  margin-bottom: 32px;
  max-width: 620px;
}

.slant-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.slant-hero__points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}

.slant-hero__points li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--cream);
}

.slant-hero__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--cream);
}

/* Blueprint visual panel */
.blueprint {
  background-color: var(--paper);
  color: var(--ink);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 24px 50px rgba(23, 16, 43, 0.35);
}

.blueprint__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 20px;
}

.blueprint__label {
  font-weight: 700;
  font-size: 15px;
}

.blueprint__status {
  font-size: 12px;
  font-weight: 700;
  color: #0F7B4D;
  background-color: #E2F5EC;
  padding: 4px 10px;
  border-radius: 999px;
}

.blueprint__body {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  min-height: 220px;
}

.blueprint__node {
  border: 2px solid var(--violet-soft);
  border-radius: 12px;
  padding: 18px 16px;
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-color: var(--lavender);
  color: var(--violet-deep);
}

.blueprint__node--core {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--violet), var(--magenta));
  color: var(--paper);
  border-color: transparent;
}

.blueprint__node--top {
  grid-column: 1 / 2;
}

.blueprint__node--mid {
  grid-column: 2 / 3;
}

.blueprint__node--bot {
  grid-column: 1 / -1;
}

.blueprint__foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-top: 16px;
  margin-top: 4px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
}

/* ---------- Commitment row (full-width statement) ---------- */
.commitment-row {
  padding: 110px 24px 90px;
}

.commitment-row__inner {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
}

.commitment-row__title {
  font-size: 40px;
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 28px;
}

.commitment-row__text {
  font-size: 18px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin-bottom: 52px;
}

.commitment-row__metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  border-top: 1px solid var(--line);
  padding-top: 44px;
}

.metric {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.metric__value {
  font-size: 54px;
  font-weight: 800;
  color: var(--violet-deep);
  line-height: 1;
}

.metric__unit {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.metric__label {
  font-size: 14px;
  color: var(--ink-soft);
}

/* ---------- Numerals grid ---------- */
.numerals-grid {
  background-color: var(--paper);
  border-top: 1px solid var(--line);
  padding: 100px 24px;
}

.numerals-grid__inner {
  max-width: 1200px;
  margin: 0 auto;
}

.numerals-grid__intro {
  max-width: 720px;
  margin-bottom: 60px;
}

.numerals-grid__title {
  font-size: 38px;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.numerals-grid__lead {
  font-size: 18px;
  color: var(--ink-soft);
}

.numerals-grid__list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.numeral {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 34px 30px;
  background-color: var(--cream);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.numeral:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 36px rgba(124, 58, 237, 0.12);
  border-color: var(--violet-soft);
}

.numeral__index {
  display: inline-block;
  font-size: 44px;
  font-weight: 800;
  line-height: 1;
  color: var(--violet);
  margin-bottom: 18px;
}

.numeral__title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--ink);
}

.numeral__text {
  font-size: 16px;
  color: var(--ink-soft);
  line-height: 1.65;
}

/* ---------- Field list ---------- */
.field-list {
  padding: 110px 24px;
}

.field-list__inner {
  max-width: 1200px;
  margin: 0 auto;
}

.field-list__header {
  max-width: 760px;
  margin-bottom: 60px;
}

.field-list__title {
  font-size: 38px;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.field-list__lead {
  font-size: 18px;
  color: var(--ink-soft);
}

.field-list__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.field {
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px 24px;
}

.field__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background-color: var(--lavender);
  color: var(--violet-deep);
  font-size: 16px;
  margin-bottom: 16px;
}

.field__title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.field__text {
  font-size: 15px;
  color: var(--ink-soft);
}

/* ---------- Connect section ---------- */
.connect-section {
  background-color: var(--lavender);
  border-top: 1px solid var(--line);
  padding: 100px 24px;
}

.connect-section__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.connect-section__title {
  font-size: 36px;
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.connect-section__text {
  font-size: 18px;
  color: var(--ink-soft);
  margin-bottom: 36px;
}

.connect-section__details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.connect-section__details li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.connect-section__detail-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--magenta);
}

.connect-section__details a,
.connect-section__details span {
  font-size: 16px;
  color: var(--ink);
  font-weight: 500;
}

.connect-section__details a:hover {
  color: var(--violet-deep);
}

.connect-form {
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.connect-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.connect-form__field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.connect-form__field input,
.connect-form__field textarea {
  font-family: inherit;
  font-size: 16px;
  color: var(--ink);
  background-color: var(--cream);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  width: 100%;
}

.connect-form__field input:focus,
.connect-form__field textarea:focus {
  outline: 2px solid var(--violet);
  outline-offset: 1px;
  border-color: transparent;
}

.connect-form__note {
  font-size: 14px;
  font-weight: 600;
  color: #0F7B4D;
  min-height: 20px;
}

/* ---------- Footer (split dark / light) ---------- */
.site-footer {
  background-color: var(--night);
}

.footer-dark {
  padding: 64px 24px 56px;
}

.footer-dark__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
}

.footer-dark__blurb {
  color: #CBC4DE;
  font-size: 15px;
  line-height: 1.6;
  margin-top: 18px;
  max-width: 320px;
}

.footer-dark__heading {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--violet-soft);
  margin-bottom: 18px;
}

.footer-dark__col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-dark__col a {
  color: #E4DFF2;
  font-size: 15px;
  transition: color 0.15s ease;
}

.footer-dark__col a:hover {
  color: var(--paper);
}

.footer-dark__col span {
  color: #CBC4DE;
  font-size: 15px;
}

.footer-light {
  background-color: var(--cream-deep);
  border-top: 1px solid #2A1F47;
  padding: 22px 24px;
}

.footer-light__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-light p {
  font-size: 14px;
  color: var(--ink-soft);
}

/* ---------- Scroll reveal ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .slant-hero__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .slant-hero__title {
    font-size: 42px;
  }

  .numerals-grid__list {
    grid-template-columns: 1fr;
  }

  .field-list__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .connect-section__inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .footer-dark__inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 680px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background-color: var(--cream);
    border-bottom: 1px solid var(--line);
    padding: 8px 0;
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    padding: 14px 24px;
  }

  .nav-links__cta {
    padding: 16px 24px 20px;
  }

  .slant-hero {
    padding: 130px 0 90px;
    clip-path: polygon(0 0, 100% 0, 100% 94%, 0 100%);
  }

  .slant-hero__title {
    font-size: 34px;
  }

  .commitment-row__title {
    font-size: 30px;
  }

  .commitment-row__metrics {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .numerals-grid__title,
  .field-list__title {
    font-size: 30px;
  }

  .field-list__grid {
    grid-template-columns: 1fr;
  }

  .connect-form__row {
    grid-template-columns: 1fr;
  }

  .footer-dark__inner {
    grid-template-columns: 1fr;
  }

  .footer-light__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}