:root {
  --bg: #f3f6fa;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --text: #19212f;
  --text-strong: #101722;
  --muted: #596373;
  --subtle: #7e8795;
  --line: #dde3eb;
  --line-strong: #cdd5df;
  --accent: #315fda;
  --accent-dark: #254db5;
  --accent-soft: #edf3ff;
  --night: #182235;
  --night-line: #344158;
  --max: 1180px;
  --radius: 16px;
  --font: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, "Helvetica Neue", Arial, "Malgun Gothic", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  letter-spacing: -0.014em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

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

.section-shell {
  position: relative;
}

/* Header */
.site-header {
  position: relative;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 13px;
  text-decoration: none;
}

.brand-name {
  font-size: 23px;
  font-weight: 760;
  letter-spacing: -0.035em;
  color: var(--text-strong);
}

.brand-tagline {
  padding-left: 13px;
  border-left: 1px solid var(--line-strong);
  color: var(--subtle);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.005em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 34px;
}

.main-nav a {
  position: relative;
  padding: 4px 0;
  color: #3f4856;
  text-decoration: none;
  font-size: 14px;
  font-weight: 560;
  letter-spacing: -0.015em;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -5px;
  height: 1px;
  background: var(--accent);
  transition: right 160ms ease;
}

.main-nav a:hover {
  color: var(--accent);
}

.main-nav a:hover::after {
  right: 0;
}

/* Shared typography */
.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 760;
  line-height: 1;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.eyebrow {
  padding: 0 10px;
  margin-bottom: 25px;
  border: 1px solid #cfdaf5;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
}

.section-heading h2,
.proof-copy h2,
.beta-copy h2,
.contact-inner h2 {
  margin: 14px 0 0;
  color: var(--text-strong);
  font-size: clamp(31px, 3vw, 43px);
  line-height: 1.3;
  font-weight: 720;
  letter-spacing: -0.04em;
}

.section-heading > p,
.proof-copy > p {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 430;
}

/* Hero */
.hero {
  padding: 84px 0 92px;
  border-bottom: 1px solid var(--line);
}

.hero::before {
  content: "";
  position: absolute;
  top: 38px;
  bottom: 38px;
  left: calc(50% + 20px);
  width: 1px;
  background: #e3e8ef;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  gap: 74px;
  align-items: center;
}

.hero-copy {
  min-width: 0;
  padding: 8px 0;
}

.hero-copy h1 {
  margin: 0;
  color: var(--text-strong);
  font-size: clamp(34px, 3.25vw, 49px);
  line-height: 1.29;
  font-weight: 735;
  letter-spacing: -0.045em;
}

.headline-line {
  display: block;
  white-space: nowrap;
}

.hero-subline {
  margin: 22px 0 0;
  color: #303a49;
  font-size: 18px;
  line-height: 1.55;
  font-weight: 610;
  letter-spacing: -0.025em;
}

.hero-description {
  max-width: 590px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
  font-weight: 420;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 31px;
}

.btn {
  min-height: 48px;
  padding: 0 21px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 650;
  letter-spacing: -0.018em;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

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

.btn-primary {
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--accent);
}

.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.btn-secondary {
  color: #26303e;
  background: #fff;
  border: 1px solid var(--line-strong);
}

.btn-secondary:hover {
  border-color: #aeb9c8;
}

.btn-static {
  cursor: default;
  user-select: none;
}

.btn-static:hover {
  transform: none;
  background: var(--accent);
  border-color: var(--accent);
}

.hero-flow {
  margin-top: 31px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--subtle);
  font-size: 11.5px;
  font-weight: 620;
  letter-spacing: 0.015em;
}

.hero-flow i {
  width: 14px;
  height: 1px;
  background: #bdc6d3;
}

.hero-product {
  min-width: 0;
  padding-left: 4px;
}

.product-frame {
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: 0 14px 34px rgba(25, 36, 55, 0.07);
}

.product-frame-hero {
  min-height: 386px;
}

.product-frame-bar {
  min-height: 44px;
  padding: 0 17px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: var(--subtle);
  background: #f8fafc;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  font-weight: 560;
  letter-spacing: 0.01em;
}

.frame-brand {
  color: #343d4b;
  font-size: 12px;
  font-weight: 730;
  letter-spacing: -0.02em;
}

.product-placeholder {
  min-height: 340px;
  margin: 18px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px dashed #c9d1dc;
  border-radius: 10px;
  text-align: center;
  background: #fbfcfe;
}

.product-placeholder strong {
  color: #4d5868;
  font-size: 14px;
  font-weight: 650;
}

.product-placeholder span {
  color: #8a93a0;
  font-size: 12px;
  font-weight: 450;
}

.product-caption {
  margin: 12px 2px 0;
  color: #8b94a1;
  font-size: 11px;
  line-height: 1.55;
}

/* Problem */
.problem-section {
  padding: 116px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.section-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 94px;
}

.sticky-heading {
  align-self: start;
}

.problem-list {
  border-top: 1px solid var(--line-strong);
}

.problem-row {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 25px;
  padding: 31px 0 34px;
  border-bottom: 1px solid var(--line);
}

.row-index {
  color: var(--accent);
  font-size: 11px;
  font-weight: 720;
  letter-spacing: 0.06em;
}

.problem-row h3 {
  margin: -4px 0 8px;
  color: #202a38;
  font-size: 19px;
  line-height: 1.4;
  font-weight: 670;
  letter-spacing: -0.025em;
}

.problem-row p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
}

/* Connected flow */
.flow-section {
  padding: 116px 0 124px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.centered-heading {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.flow-track {
  margin-top: 65px;
  display: grid;
  grid-template-columns: 1fr 34px 1fr 34px 1fr 34px 1fr;
  align-items: stretch;
}

.flow-step {
  min-width: 0;
  padding: 26px 22px 30px;
  background: var(--surface);
  border-top: 2px solid #b8c8ec;
  border-bottom: 1px solid var(--line);
}

.flow-step:first-child {
  border-left: 1px solid var(--line);
  border-radius: 12px 0 0 12px;
}

.flow-step:nth-last-child(1) {
  border-right: 1px solid var(--line);
  border-radius: 0 12px 12px 0;
}

.flow-number {
  display: block;
  color: #9aa3b0;
  font-size: 10px;
  font-weight: 720;
  letter-spacing: 0.08em;
}

.flow-step > strong {
  display: block;
  margin-top: 19px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 730;
  letter-spacing: 0.015em;
}

.flow-step h3 {
  margin: 8px 0 0;
  color: #202937;
  font-size: 16px;
  line-height: 1.45;
  font-weight: 680;
  letter-spacing: -0.025em;
}

.flow-step p {
  margin: 11px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.flow-connector {
  position: relative;
  align-self: center;
  height: 1px;
  background: #bfc9d7;
}

.flow-connector::after {
  content: "";
  position: absolute;
  right: 0;
  top: -3px;
  width: 6px;
  height: 6px;
  border-top: 1px solid #9aa8ba;
  border-right: 1px solid #9aa8ba;
  transform: rotate(45deg);
}

/* Capabilities */
.capability-section {
  padding: 118px 0 124px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.capability-heading {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 80px;
  align-items: end;
}

.capability-heading .section-kicker {
  grid-column: 1 / -1;
}

.capability-heading h2 {
  max-width: 550px;
}

.capability-heading p {
  max-width: 500px;
  margin-bottom: 3px;
}

.capability-layout {
  margin-top: 61px;
  display: grid;
  grid-template-columns: 0.84fr 1.16fr;
  gap: 34px;
}

.capability-primary {
  min-height: 410px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: #eef3fb;
  border: 1px solid #d9e2f1;
  border-radius: 14px;
}

.capability-label {
  color: var(--accent);
  font-size: 11px;
  font-weight: 730;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.capability-primary h3 {
  margin: 12px 0 0;
  color: #1d2736;
  font-size: 28px;
  line-height: 1.32;
  font-weight: 710;
  letter-spacing: -0.035em;
}

.capability-primary p {
  max-width: 430px;
  margin: 14px 0 0;
  color: #596577;
  font-size: 14.5px;
  line-height: 1.75;
}

.capability-detail-list {
  border-top: 1px solid var(--line-strong);
}

.capability-detail-list article {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 20px;
  padding: 21px 5px 23px 0;
  border-bottom: 1px solid var(--line);
}

.capability-detail-list article > span {
  color: #9aa3b0;
  font-size: 10px;
  font-weight: 720;
  letter-spacing: 0.06em;
}

.capability-detail-list h3 {
  margin: -3px 0 5px;
  color: #25303f;
  font-size: 16px;
  font-weight: 680;
  letter-spacing: -0.02em;
}

.capability-detail-list p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.7;
}

/* Product proof */
.proof-section {
  padding: 122px 0;
  background: var(--surface-soft);
  border-bottom: 1px solid var(--line);
}

.proof-grid {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 64px;
  align-items: center;
}

.proof-copy h2 {
  font-size: clamp(30px, 2.8vw, 41px);
}

.proof-note {
  margin-top: 31px;
  padding-top: 18px;
  border-top: 1px solid var(--line-strong);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.proof-note strong {
  color: #344050;
  font-size: 12px;
  font-weight: 700;
}

.proof-note span {
  color: var(--subtle);
  font-size: 12px;
  line-height: 1.65;
}

.product-frame-proof {
  min-height: 500px;
}

.product-placeholder-large {
  min-height: 420px;
}

.proof-secondary-grid {
  margin-top: 76px;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 64px;
  align-items: center;
}

.product-frame-secondary .product-placeholder {
  min-height: 265px;
}

.compact-bar {
  justify-content: flex-end;
}

.proof-secondary-copy h3 {
  margin: 14px 0 0;
  color: var(--text-strong);
  font-size: 28px;
  line-height: 1.35;
  font-weight: 710;
  letter-spacing: -0.035em;
}

.proof-secondary-copy p {
  margin: 15px 0 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
}

/* Beta */
.beta-section {
  padding: 92px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.beta-panel {
  padding: 55px 58px;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 78px;
  color: #fff;
  background: var(--night);
  border-radius: 16px;
}

.light-kicker {
  color: #a9bdf8;
}

.beta-copy h2 {
  color: #fff;
  font-size: clamp(29px, 2.8vw, 40px);
}

.beta-detail > p {
  margin: 4px 0 27px;
  color: #c6ceda;
  font-size: 14.5px;
  line-height: 1.75;
}

.beta-detail dl {
  margin: 0;
  border-top: 1px solid var(--night-line);
}

.beta-detail dl > div {
  padding: 13px 0;
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 18px;
  border-bottom: 1px solid var(--night-line);
}

.beta-detail dt {
  color: #8f9aae;
  font-size: 11px;
  font-weight: 650;
}

.beta-detail dd {
  margin: 0;
  color: #e6eaf0;
  font-size: 12.5px;
  font-weight: 520;
}

/* Contact */
.contact-section {
  padding: 112px 0 116px;
  background: var(--bg);
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 0.7fr;
  gap: 96px;
  align-items: end;
}

.contact-inner h2 {
  max-width: 700px;
}

.contact-action {
  padding-bottom: 5px;
}

.contact-action p {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.contact-note {
  display: block;
  margin-top: 11px;
  color: #8a93a0;
  font-size: 10.5px;
}

/* Footer */
.site-footer {
  padding: 36px 0 39px;
  color: #657080;
  background: #fff;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px 54px;
  align-items: center;
}

.footer-brand {
  display: flex;
  align-items: baseline;
  gap: 9px;
}

.footer-brand strong {
  color: #202a38;
  font-size: 16px;
  letter-spacing: -0.025em;
}

.footer-brand span {
  color: #9aa2ae;
  font-size: 10.5px;
}

.footer-links {
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 9px 21px;
  font-size: 11px;
}

.footer-links span {
  white-space: nowrap;
}

.footer-status {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid #edf0f4;
  color: #9aa2ad;
  font-size: 10.5px;
  letter-spacing: 0.01em;
}

/* Medium desktop */
@media (max-width: 1080px) {
  .hero {
    padding-top: 72px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 48px;
  }

  .hero-copy h1 {
    font-size: clamp(32px, 3.25vw, 37px);
  }

  .hero-description {
    font-size: 14px;
  }

  .product-frame-hero {
    min-height: 340px;
  }

  .product-frame-hero .product-placeholder {
    min-height: 294px;
  }

  .section-grid,
  .proof-grid,
  .proof-secondary-grid {
    gap: 58px;
  }

  .flow-track {
    grid-template-columns: 1fr 24px 1fr 24px 1fr 24px 1fr;
  }

  .flow-step {
    padding-left: 17px;
    padding-right: 17px;
  }

  .capability-heading {
    column-gap: 50px;
  }
}

/* Tablet / stacked */
@media (max-width: 880px) {
  .container {
    width: min(var(--max), calc(100% - 36px));
  }

  .main-nav {
    gap: 20px;
  }

  .hero::before {
    display: none;
  }

  .hero-grid,
  .section-grid,
  .capability-heading,
  .capability-layout,
  .proof-grid,
  .proof-secondary-grid,
  .beta-panel,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 49px;
  }

  .hero-copy h1 {
    font-size: clamp(33px, 5.7vw, 44px);
  }

  .headline-line {
    white-space: normal;
  }

  .hero-product {
    padding-left: 0;
  }

  .problem-section,
  .flow-section,
  .capability-section,
  .proof-section,
  .contact-section {
    padding-top: 88px;
    padding-bottom: 92px;
  }

  .section-grid,
  .proof-grid,
  .proof-secondary-grid,
  .contact-inner {
    gap: 42px;
  }

  .flow-track {
    margin-top: 48px;
    grid-template-columns: 1fr;
  }

  .flow-step {
    border: 1px solid var(--line);
    border-top: 2px solid #b8c8ec;
    border-radius: 10px !important;
  }

  .flow-connector {
    width: 1px;
    height: 24px;
    justify-self: center;
  }

  .flow-connector::after {
    right: -3px;
    top: auto;
    bottom: 0;
    transform: rotate(135deg);
  }

  .capability-heading h2,
  .capability-heading p {
    max-width: none;
  }

  .capability-heading p {
    margin-top: 17px;
  }

  .capability-layout {
    gap: 28px;
  }

  .capability-primary {
    min-height: 310px;
  }

  .proof-secondary-grid {
    margin-top: 50px;
  }

  .proof-secondary-copy {
    order: -1;
  }

  .beta-panel {
    gap: 36px;
    padding: 45px 40px;
  }

  .contact-action {
    max-width: 500px;
  }
}

/* Mobile */
@media (max-width: 640px) {
  .container {
    width: min(var(--max), calc(100% - 28px));
  }

  .header-inner {
    height: auto;
    min-height: 70px;
    align-items: center;
  }

  .brand-tagline {
    display: none;
  }

  .brand-name {
    font-size: 21px;
  }

  .main-nav {
    gap: 13px;
  }

  .main-nav a {
    font-size: 12px;
  }

  .hero {
    padding: 62px 0 70px;
  }

  .hero-copy h1 {
    font-size: clamp(31px, 9.1vw, 39px);
    line-height: 1.3;
  }

  .hero-subline {
    font-size: 16px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .btn {
    width: 100%;
  }

  .hero-flow {
    flex-wrap: wrap;
    gap: 7px;
  }

  .hero-flow i {
    width: 9px;
  }

  .product-frame-hero,
  .product-frame-proof {
    min-height: 0;
  }

  .product-placeholder,
  .product-frame-hero .product-placeholder,
  .product-placeholder-large,
  .product-frame-secondary .product-placeholder {
    min-height: 230px;
    margin: 12px;
  }

  .section-heading h2,
  .proof-copy h2,
  .beta-copy h2,
  .contact-inner h2 {
    font-size: 29px;
  }

  .problem-row {
    grid-template-columns: 38px 1fr;
    gap: 12px;
  }

  .capability-primary {
    min-height: 280px;
    padding: 28px;
  }

  .capability-primary h3 {
    font-size: 24px;
  }

  .beta-section {
    padding: 58px 0;
  }

  .beta-panel {
    padding: 34px 26px;
    border-radius: 13px;
  }

  .beta-detail dl > div {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 19px;
  }

  .footer-links {
    justify-content: flex-start;
    gap: 8px 15px;
  }

  .footer-status {
    grid-column: 1;
  }
}