:root {
  --bg: #ffffff;
  --ink: #18181b;
  --muted: #71717a;
  --soft: #f4f4f5;
  --line: #e4e4e7;
  --green: #22c55e;
  --green-dark: #16a34a;
  --green-soft: #dcfce7;
  --navy: #111827;
  --navy-soft: #1f2937;
  --max: 1160px;
  --radius: 16px;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(24, 24, 27, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 24, 27, 0.045) 1px, transparent 1px),
    var(--bg);
  background-size: 40px 40px;
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Segoe UI", sans-serif;
  line-height: 1.65;
  word-break: keep-all;
}

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

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

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 100;
  transform: translateY(-160%);
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(228, 228, 231, 0.8);
  backdrop-filter: blur(16px);
}

.nav-shell {
  width: min(calc(100% - 32px), var(--max));
  height: 58px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
}

.nav-links a {
  padding: 8px 12px;
  border-radius: 8px;
}

.nav-links a:hover {
  background: var(--soft);
  color: var(--ink);
}

.nav-cta {
  justify-self: end;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--green);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(34, 197, 94, 0.22);
}

.section-grid,
.metrics,
.content-section,
.split-section,
.final-cta,
.site-footer {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}

.hero {
  min-height: calc(100svh - 58px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.78fr);
  align-items: center;
  gap: 48px;
  padding: 56px 0 52px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 32px;
  margin: 0 0 18px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--green-soft);
  color: #087a37;
  font-size: 14px;
  font-weight: 800;
}

.hero h1,
.section-heading h2,
.final-card h2 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.08;
}

.hero h1 {
  font-size: clamp(40px, 5.4vw, 68px);
  max-width: 820px;
}

.hero-lead {
  max-width: 690px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2.2vw, 23px);
  font-weight: 500;
}

.hero-lead strong {
  color: var(--ink);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: var(--green);
  color: #fff;
  box-shadow: 0 18px 40px rgba(34, 197, 94, 0.26);
}

.button.primary:hover {
  background: var(--green-dark);
}

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

.microcopy {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.hero-visual {
  position: relative;
  min-width: 0;
}

.phone-frame,
.image-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.phone-frame {
  transform: rotate(1.5deg);
}

.phone-frame img {
  width: 100%;
}

.floating-note {
  position: absolute;
  right: 18px;
  bottom: 38px;
  display: grid;
  gap: 0;
  min-width: 146px;
  padding: 16px 18px;
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.16);
  backdrop-filter: blur(10px);
}

.floating-note span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.floating-note strong {
  font-size: 34px;
  line-height: 1;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 36px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metric {
  padding: 10px 24px;
  border-left: 1px solid var(--line);
  text-align: center;
}

.metric:first-child {
  border-left: 0;
}

.metric strong {
  display: block;
  margin-bottom: 6px;
  font-size: 24px;
  line-height: 1.2;
}

.metric span {
  color: var(--muted);
  font-size: 15px;
}

.content-section,
.split-section {
  padding: 112px 0;
}

.soft-band {
  width: 100%;
  max-width: none;
  padding-inline: max(16px, calc((100vw - var(--max)) / 2));
  background: #f4f4f5;
}

.section-heading {
  max-width: 810px;
  margin-bottom: 42px;
}

.section-heading.center {
  margin-inline: auto;
  text-align: center;
}

.section-heading h2 {
  font-size: clamp(34px, 4.2vw, 54px);
}

.section-heading p:not(.eyebrow) {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
  font-weight: 500;
}

.reason-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.reason-card {
  min-height: 316px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
}

.reason-card span {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  margin-bottom: 48px;
  border-radius: 50%;
  background: var(--green-soft);
  color: #087a37;
  font-weight: 900;
}

.reason-card h3,
.benefit-grid h3 {
  margin: 0 0 12px;
  line-height: 1.32;
  font-size: 22px;
}

.reason-card p,
.benefit-grid p,
.image-card figcaption,
.site-footer p {
  margin: 0;
  color: var(--muted);
}

.split-section {
  display: grid;
  grid-template-columns: 0.72fr 1fr;
  align-items: center;
  gap: 56px;
}

.image-card {
  padding: 14px;
}

.image-card img {
  width: 100%;
  border-radius: 10px;
}

.image-card figcaption {
  padding: 14px 4px 2px;
  font-size: 14px;
  font-weight: 600;
}

.image-card.wide {
  transform: rotate(-1deg);
}

.proof-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

.proof-layout .span {
  grid-column: 1 / -1;
  background: var(--navy);
  border-color: rgba(255, 255, 255, 0.12);
}

.proof-layout .span figcaption {
  color: #cbd5e1;
}

.dark-band {
  width: 100%;
  max-width: none;
  padding-inline: max(16px, calc((100vw - var(--max)) / 2));
  background:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    var(--navy);
  background-size: 40px 40px;
  color: #fff;
}

.dark-band .section-heading p:not(.eyebrow) {
  color: #cbd5e1;
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.benefit-grid article {
  min-height: 220px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
}

.benefit-grid p {
  color: #cbd5e1;
}

.decision-section .section-heading {
  max-width: 940px;
  margin-bottom: 30px;
}

.decision-section .section-heading p:not(.eyebrow) {
  max-width: 900px;
  margin-inline: auto;
}

.decision-grid {
  max-width: 980px;
  margin-inline: auto;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.decision-section .reason-card {
  min-height: 300px;
  text-align: left;
}

.decision-section .reason-card span {
  margin-bottom: 26px;
}

.decision-section .reason-card p {
  font-size: 17px;
  line-height: 1.72;
}

.decision-action {
  display: flex;
  justify-content: center;
  margin-top: 28px;
}

.community-section {
  padding-bottom: 72px;
}

.social-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.social-row a {
  display: inline-flex;
  min-width: 154px;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  text-align: center;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.12);
  transition: transform 180ms ease, box-shadow 180ms ease, filter 180ms ease;
}

.social-row a:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.18);
  filter: saturate(1.08);
}

.platform-link::before {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  font-size: 14px;
  font-weight: 900;
  line-height: 1;
}

.platform-link.threads {
  background: #101010;
}

.platform-link.threads::before {
  content: "@";
  border: 1px solid rgba(255, 255, 255, 0.36);
}

.platform-link.x {
  background: #000;
}

.platform-link.x::before {
  content: "X";
}

.platform-link.telegram {
  background: #229ed9;
}

.platform-link.telegram::before {
  content: ">";
  transform: rotate(-35deg);
}

.platform-link.youtube {
  background: #ff0033;
}

.platform-link.youtube::before {
  content: "▶";
  font-size: 12px;
}

.final-cta {
  padding: 0 0 112px;
}

.final-card {
  padding: clamp(32px, 6vw, 70px);
  border-radius: 24px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    var(--navy-soft);
  background-size: 34px 34px;
  color: #fff;
  text-align: center;
  box-shadow: var(--shadow);
}

.final-card h2 {
  max-width: 820px;
  margin: 0 auto;
  font-size: clamp(34px, 4.8vw, 58px);
}

.final-card p:not(.eyebrow) {
  max-width: 720px;
  margin: 18px auto 28px;
  color: #cbd5e1;
  font-size: 18px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  padding: 30px 0 54px;
  border-top: 1px solid var(--line);
}

.site-footer strong {
  display: block;
  margin-bottom: 6px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
  color: var(--muted);
  font-weight: 700;
}

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

.footer-premium {
  padding: 6px 11px;
  border-radius: 999px;
  background: #03c75a;
  color: #fff;
  box-shadow: 0 8px 20px rgba(3, 199, 90, 0.18);
}

.footer-links .footer-premium:hover {
  color: #fff;
  filter: brightness(0.94);
}

.footer-platform {
  padding: 6px 10px;
  border-radius: 999px;
  color: #fff;
}

.footer-platform.threads,
.footer-platform.x {
  background: #111;
}

.footer-platform.telegram {
  background: #229ed9;
}

.footer-platform.youtube {
  background: #ff0033;
}

.footer-links .footer-platform:hover {
  color: #fff;
  filter: brightness(0.94);
}

@media (max-width: 960px) {
  .nav-shell {
    grid-template-columns: 1fr auto;
  }

  .nav-links {
    display: none;
  }

  .hero,
  .split-section {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 58px;
  }

  .metrics,
  .reason-grid,
  .benefit-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .metric:nth-child(3) {
    border-left: 0;
  }

  .floating-note {
    right: 14px;
  }
}

@media (max-width: 640px) {
  body {
    background-size: 30px 30px;
  }

  .nav-shell {
    width: min(calc(100% - 24px), var(--max));
    height: 62px;
  }

  .brand span:last-child {
    font-size: 15px;
  }

  .nav-cta {
    padding: 9px 12px;
    font-size: 14px;
  }

  .section-grid,
  .metrics,
  .content-section,
  .split-section,
  .final-cta,
  .site-footer {
    width: min(calc(100% - 24px), var(--max));
  }

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

  .hero-actions,
  .button {
    width: 100%;
  }

  .metrics,
  .reason-grid,
  .proof-layout,
  .benefit-grid {
    grid-template-columns: 1fr;
  }

  .metric,
  .metric:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .metric:first-child {
    border-top: 0;
  }

  .content-section,
  .split-section {
    padding: 78px 0;
  }

  .soft-band,
  .dark-band {
    width: 100%;
    padding-inline: 12px;
  }

  .reason-card {
    min-height: auto;
  }

  .decision-section .reason-card {
    min-height: auto;
  }

  .reason-card span {
    margin-bottom: 30px;
  }

  .proof-layout .span {
    grid-column: auto;
  }

  .site-footer {
    display: block;
  }

  .footer-links {
    justify-content: flex-start;
    margin-top: 18px;
  }
}