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

:root {
  --kakao: #FEE500;
  --kakao-text: #191919;
  --accent: #ffd9a8;
  --font: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-en: 'Geist', sans-serif;
  --spring: cubic-bezier(0.16, 1, 0.3, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: #fff;
  background-color: var(--grad-0);
  background-image: var(--grad-stops);
  background-repeat: no-repeat;
  background-size: 100% 100vh;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: calc(84px + env(safe-area-inset-bottom, 0px));
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  word-break: keep-all;
  overflow-x: hidden;
}

@supports (background-size: 100dvh) {
  body {
    background-size: 100% 100dvh;
  }
}

@supports (min-height: 100dvh) {
  body {
    min-height: 100dvh;
  }
}

body::before {
  content: '';
  position: fixed;
  top: -25%;
  right: -20%;
  width: 720px;
  height: 720px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--blob-1) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  bottom: -30%;
  left: -20%;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--blob-2) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

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

header {
  padding: 22px 28px;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2;
}

header .logo {
  height: 22px;
  width: auto;
  display: block;
}

.tab-nav {
  position: fixed;
  bottom: calc(14px + env(safe-area-inset-bottom, 0px));
  left: 50%;
  transform: translateX(-50%);
  max-width: calc(100% - 24px);
  display: flex;
  gap: 4px;
  padding: 6px;
  background: rgba(0, 0, 0, .55);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, .15);
  border-radius: 22px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, .4);
  z-index: 10;
}

.tab-link {
  flex: 0 0 auto;
  text-align: center;
  padding: 11px 18px;
  font-size: 13px;
  font-weight: 700;
  color: rgba(255, 255, 255, .7);
  border-radius: 16px;
  letter-spacing: -.2px;
  transition: background .2s, color .2s;
  white-space: nowrap;
}

.tab-link[aria-current="page"] {
  background: rgba(255, 255, 255, .18);
  color: #fff;
}

.tab-link:hover:not([aria-current="page"]) {
  color: rgba(255, 255, 255, .92);
}


main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 24px;
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

@supports (min-height: 100dvh) {
  main {
    min-height: 100dvh;
  }
}

.hero-inner {
  max-width: 560px;
  width: 100%;
  text-align: center;
  position: relative;
}

.sub-segmented {
  position: absolute;
  top: -90px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  width: fit-content;
  gap: 4px;
  padding: 0;
  margin: 0;
  background: transparent;
  border: none;
}

.sub-seg-link {
  position: relative;
  padding: 8px 14px;
  font-size: 12.5px;
  font-weight: 700;
  color: rgba(255, 255, 255, .5);
  letter-spacing: -.2px;
  transition: color .2s;
  white-space: nowrap;
}

.sub-seg-link[aria-current="page"] {
  color: var(--accent);
}

.sub-seg-link[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.sub-seg-link:hover:not([aria-current="page"]) {
  color: rgba(255, 255, 255, .85);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-radius: 100px;
  padding: 7px 18px;
  font-size: 12px;
  font-weight: 600;
  color: rgba(255, 255, 255, .88);
  margin-bottom: 30px;
  letter-spacing: .3px;
}

.hero-badge::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 0 3px rgba(74, 222, 128, .22);
  animation: blink 2s infinite;
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: .35;
  }
}

h1 {
  font-size: clamp(30px, 5.4vw, 48px);
  font-weight: 900;
  color: #fff;
  line-height: 1.22;
  letter-spacing: -1.6px;
  margin-bottom: 22px;
}

h1 em {
  color: var(--accent);
  font-style: normal;
}

.metric-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin: 0 0 34px;
}

.metric-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .2);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  padding: 7px 14px;
  border-radius: 100px;
  font-size: 12.5px;
  font-weight: 700;
  color: rgba(255, 255, 255, .92);
  letter-spacing: .2px;
  white-space: nowrap;
}

.metric-chip svg,
.metric-chip iconify-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  opacity: .88;
}

.metric-chip iconify-icon {
  display: inline-block;
}

.hero-sub {
  font-size: clamp(15px, 1.9vw, 17px);
  color: rgba(255, 255, 255, .72);
  line-height: 1.6;
  margin-bottom: 42px;
  font-weight: 500;
}

.hero-sub em {
  color: #fff;
  font-style: normal;
  font-weight: 700;
}

.kakao-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--kakao);
  color: var(--kakao-text);
  border: none;
  border-radius: 14px;
  padding: 18px 40px;
  font-size: 17px;
  font-weight: 800;
  cursor: pointer;
  font-family: var(--font);
  transition: transform .4s var(--spring), box-shadow .4s var(--spring);
  box-shadow: 0 12px 32px rgba(254, 229, 0, .28);
  min-width: 264px;
}

.kakao-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 44px rgba(254, 229, 0, .42);
}

.kakao-btn:active {
  transform: translateY(0) scale(.98);
}

.kakao-btn svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.micro-copy {
  margin-top: 18px;
  font-size: 13px;
  color: rgba(255, 255, 255, .55);
  font-weight: 500;
  letter-spacing: .1px;
}

footer {
  padding: 24px 24px 28px;
  text-align: center;
  font-size: 11px;
  color: rgba(255, 255, 255, .38);
  line-height: 1.8;
  position: relative;
  z-index: 1;
}

footer strong {
  color: rgba(255, 255, 255, .55);
  font-weight: 600;
}

.fade-in {
  animation: fadeIn .7s var(--spring) both;
}

.fade-in.d1 {
  animation-delay: .08s;
}

.fade-in.d2 {
  animation-delay: .16s;
}

.fade-in.d3 {
  animation-delay: .28s;
}

.fade-in.d4 {
  animation-delay: .4s;
}

.fade-in.d5 {
  animation-delay: .52s;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.ext-section {
  padding: 72px 24px;
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255, 255, 255, .08);
}

.section-inner {
  max-width: 720px;
  margin: 0 auto;
}

.section-title {
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 900;
  color: #fff;
  text-align: center;
  margin-bottom: 36px;
  letter-spacing: -1px;
}

.persona-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
}

.persona-card {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 14px;
  padding: 22px 20px;
  text-align: center;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.persona-icon {
  margin-bottom: 12px;
  line-height: 1;
  color: var(--accent);
}

.persona-icon iconify-icon {
  display: inline-block;
  vertical-align: middle;
}

.persona-card h3 {
  font-size: 15px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}

.persona-card p {
  font-size: 13px;
  color: rgba(255, 255, 255, .72);
  line-height: 1.6;
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.process-step {
  display: flex;
  gap: 18px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 14px;
  padding: 20px 22px;
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .15);
  color: #fff;
  font-weight: 900;
  font-family: var(--font-en);
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-body h3 {
  font-size: 15px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}

.step-body p {
  font-size: 13px;
  color: rgba(255, 255, 255, .72);
  line-height: 1.6;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 12px;
  padding: 16px 20px;
}

.faq-item summary {
  font-size: 14.5px;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 28px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 300;
  color: rgba(255, 255, 255, .55);
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item p {
  margin-top: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, .75);
  line-height: 1.7;
}

.about-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, .78);
  line-height: 1.8;
  margin-bottom: 12px;
  text-align: center;
}

.about-desc:last-of-type {
  margin-bottom: 30px;
}

.about-desc strong {
  color: #fff;
  font-weight: 700;
}

.cta-section .section-inner {
  text-align: center;
}

.cta-section .section-title {
  margin-bottom: 12px;
}

.cta-sub {
  font-size: 14px;
  color: rgba(255, 255, 255, .72);
  line-height: 1.6;
  margin-bottom: 28px;
}

.cta-micro {
  margin-top: 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, .55);
  font-weight: 500;
  letter-spacing: .1px;
}

.about-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.about-stat {
  text-align: center;
}

.stat-num {
  font-family: var(--font-en);
  font-size: 22px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -.5px;
}

.stat-num span {
  font-family: var(--font);
  font-size: 14px;
  margin-left: 2px;
  font-weight: 700;
}

.stat-label {
  font-size: 12px;
  color: rgba(255, 255, 255, .55);
  margin-top: 4px;
}

@media (max-width: 480px) {
  header {
    padding: 16px 20px;
  }

  main {
    padding: 20px;
  }

  .hero-badge {
    font-size: 11px;
    padding: 6px 14px;
    margin-bottom: 24px;
  }

  h1 {
    letter-spacing: -1px;
    margin-bottom: 18px;
  }

  .hero-sub {
    margin-bottom: 34px;
  }

  .kakao-btn {
    width: 100%;
    min-width: 0;
    padding: 18px 24px;
    font-size: 16px;
  }

  footer {
    padding: 18px 20px 22px;
    font-size: 10.5px;
  }

  .ext-section {
    padding: 56px 20px;
  }

  .section-title {
    margin-bottom: 24px;
  }

  .process-step {
    gap: 12px;
    padding: 16px 18px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    animation: none;
  }

  .hero-badge::before {
    animation: none;
  }
}