:root {
  --mint: #14b58c;
  --mint-deep: #0d8f6e;
  --mint-soft: #e6f7f2;
  --ink: #10241f;
  --ink-soft: #3d524c;
  --paper: #f7fbf9;
  --line: rgba(16, 36, 31, 0.1);
  --shadow: 0 24px 60px rgba(16, 36, 31, 0.12);
  --radius: 18px;
  --max: 1080px;
  --font-display: "Fraunces", "Noto Serif JP", "Noto Serif TC", "Noto Serif KR", serif;
  --font-body: "Manrope", "Noto Sans JP", "Noto Sans TC", "Noto Sans KR", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(20, 181, 140, 0.22), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(20, 181, 140, 0.12), transparent 50%),
    linear-gradient(180deg, #edf8f4 0%, var(--paper) 42%, #ffffff 100%);
  font-family: var(--font-body);
  line-height: 1.65;
  min-height: 100vh;
}

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

a {
  color: var(--mint-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

.wrap {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(247, 251, 249, 0.82);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: inherit;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.brand-mark span {
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
}

.lang-switch {
  display: inline-flex;
  gap: 0.25rem;
  padding: 0.2rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
}

.lang-switch button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  cursor: pointer;
}

.lang-switch button[aria-pressed="true"] {
  background: var(--ink);
  color: #fff;
}

.hero {
  min-height: calc(100svh - 72px);
  display: grid;
  align-items: end;
  padding: 2.5rem 0 3.5rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 8% -10% auto auto;
  width: min(62vw, 620px);
  aspect-ratio: 1;
  background:
    radial-gradient(circle at 40% 40%, rgba(20, 181, 140, 0.35), transparent 62%),
    url("../assets/brand.png") center / cover no-repeat;
  border-radius: 40% 60% 55% 45%;
  filter: saturate(1.05);
  opacity: 0.95;
  pointer-events: none;
  animation: drift 14s ease-in-out infinite alternate;
}

@keyframes drift {
  from {
    transform: translate3d(0, 0, 0) rotate(-2deg);
  }
  to {
    transform: translate3d(-18px, 24px, 0) rotate(3deg);
  }
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 34rem;
  padding-bottom: 1rem;
}

.hero-brand {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 9vw, 5.6rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  font-weight: 700;
}

.hero-title {
  margin: 0 0 0.85rem;
  font-size: clamp(1.35rem, 3.2vw, 1.85rem);
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-lead {
  margin: 0 0 1.6rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 32rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 48px;
  padding: 0.75rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease;
}

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

.btn-primary {
  background: var(--ink);
  color: #fff;
}

.btn-primary:hover {
  background: var(--mint-deep);
  color: #fff;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.72);
  border-color: var(--line);
  color: var(--ink);
}

.section {
  padding: 4.5rem 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.3rem);
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.section-lead {
  margin: 0 0 2rem;
  color: var(--ink-soft);
  max-width: 38rem;
}

.feature-list {
  display: grid;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  display: grid;
  gap: 0.35rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
}

.feature-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.feature-list strong {
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.feature-list span {
  color: var(--ink-soft);
}

.privacy-band {
  background: linear-gradient(135deg, #10241f 0%, #16483c 55%, #0d8f6e 100%);
  color: #f4fffb;
  border-radius: calc(var(--radius) + 8px);
  padding: clamp(1.75rem, 4vw, 2.75rem);
  box-shadow: var(--shadow);
  animation: rise-in 0.8s ease both;
}

.privacy-band h2 {
  color: inherit;
  margin-bottom: 0.6rem;
}

.privacy-band p {
  margin: 0;
  max-width: 40rem;
  color: rgba(244, 255, 251, 0.88);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-hero {
  padding: 3rem 0 1.5rem;
}

.page-hero h1 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.page-hero .meta {
  color: var(--ink-soft);
  margin: 0;
}

.legal {
  padding-bottom: 4rem;
}

.legal article {
  display: grid;
  gap: 1.5rem;
}

.legal section {
  padding: 0;
  border: 0;
}

.legal h2 {
  margin: 0 0 0.55rem;
  font-size: 1.2rem;
  font-family: var(--font-body);
  letter-spacing: -0.01em;
}

.legal p,
.legal li {
  color: var(--ink-soft);
  margin: 0 0 0.7rem;
}

.pre-line {
  white-space: pre-line;
}

.support-card {
  display: grid;
  gap: 0.85rem;
  padding: 1.4rem 0 0;
}

.support-row {
  display: grid;
  grid-template-columns: minmax(7rem, 10rem) 1fr;
  gap: 0.75rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
}

.support-row:last-child {
  border-bottom: 1px solid var(--line);
}

.support-row dt {
  margin: 0;
  font-weight: 700;
  color: var(--ink);
}

.support-row dd {
  margin: 0;
  color: var(--ink-soft);
}

.legal ul {
  margin: 0;
  padding-left: 1.2rem;
}

.legal li {
  margin-bottom: 0.45rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 2.75rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: flex-start;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.2rem;
}

.footer-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 600;
}

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

@media (max-width: 820px) {
  .hero::before {
    inset: auto auto -8% 42%;
    width: min(78vw, 420px);
    opacity: 0.55;
  }

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

  .nav-links {
    width: 100%;
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}