@font-face {
  font-family: "Higure Gothic";
  src: url("/assets/fonts/HigureGothic-Medium.ttf") format("truetype");
  font-weight: 500;
  font-style: normal;
}

@font-face {
  font-family: "Higure Gothic";
  src: url("/assets/fonts/HigureGothic-Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
}

:root {
  color-scheme: light;
  --ehtia-ink: #433e3f;
  --ehtia-gray: #7a7265;
  --ehtia-canvas: #f0ede8;
  --ehtia-midnight: #080c25;
  --line-soft: rgba(122, 114, 101, 0.14);
  --dust-soft: rgba(192, 183, 177, 0.5);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background:
    radial-gradient(circle at 50% 10%, rgba(255, 255, 255, 0.74), rgba(255, 255, 255, 0) 38%),
    radial-gradient(circle at 20% 0%, rgba(255, 255, 255, 0.52), rgba(255, 255, 255, 0) 28%),
    var(--ehtia-canvas);
}

body {
  margin: 0;
  min-height: 100dvh;
  color: var(--ehtia-ink);
  font-family: "Higure Gothic", "Hiragino Sans", "Yu Gothic", sans-serif;
  letter-spacing: 0.03em;
  -webkit-font-smoothing: antialiased;
  line-height: 1.8;
  background-image: radial-gradient(var(--dust-soft) 1.5px, transparent 1.5px);
  background-size: 60px 60px;
  background-position: 60px 60px;
}

a {
  color: var(--ehtia-midnight);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

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

.page {
  width: min(820px, calc(100vw - 48px));
  margin: 0 auto;
  padding: 24px 0 56px;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--ehtia-midnight);
  text-decoration: none;
}

.brand-symbol-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  object-fit: contain;
  transform: rotate(-6deg);
}

.panel {
  border-top: 1px solid var(--line-soft);
  padding-top: 28px;
}

.page-title {
  margin: 0 0 14px;
  color: var(--ehtia-midnight);
  line-height: 1.24;
  font-weight: 700;
  font-size: clamp(1.9rem, 4vw, 3rem);
}

.lead {
  margin: 0;
  color: var(--ehtia-gray);
  font-size: 1rem;
  letter-spacing: 0.03em;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button-row-tight {
  margin-top: 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  text-decoration: none;
  font-size: 0.92rem;
  letter-spacing: 0.05em;
}

.button.primary {
  background: var(--ehtia-midnight);
  color: var(--ehtia-canvas);
  width: min(100%, 320px);
  min-height: 44px;
  padding: 0 22px;
}

.button.secondary {
  color: var(--ehtia-gray);
  background: transparent;
}

.button.secondary:hover {
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.3em;
  text-decoration-color: var(--ehtia-gray);
}

.section + .section {
  margin-top: 28px;
}

.section h2 {
  margin: 0 0 18px;
  color: var(--ehtia-midnight);
  font-size: clamp(1.4rem, 2.8vw, 2.1rem);
  letter-spacing: 0.04em;
}

.section h3 {
  margin: 18px 0 10px;
  color: var(--ehtia-midnight);
  font-size: 1rem;
  letter-spacing: 0.03em;
}

.section p,
.section li {
  color: var(--ehtia-gray);
  margin: 0 0 10px;
}

.section ul {
  padding-left: 1.1rem;
  margin: 0;
}

.meta {
  color: var(--ehtia-gray);
  font-size: 0.92rem;
  margin: 0 0 10px;
}

.embed {
  border: 1px solid var(--line-soft);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.5);
}

.embed-simple {
  margin-top: 4px;
}

.embed iframe {
  width: 100%;
  min-height: 1240px;
  border: 0;
}

.welcome-shell {
  min-height: calc(100vh - 120px);
  display: grid;
  grid-template-rows: auto auto auto;
  justify-items: center;
  align-content: center;
  row-gap: 38px;
  text-align: center;
  padding: 16px 0 8px;
}

.brand-block {
  display: grid;
  justify-items: center;
  row-gap: 4px;
}

.welcome-icon {
  width: 120px;
  height: 120px;
  object-fit: contain;
  transform: rotate(-6deg);
}

.welcome-brand {
  display: grid;
  margin-top: 0;
}

.welcome-title {
  margin: 0;
  color: var(--ehtia-midnight);
  font-size: var(--brand-title-size, 0.92rem);
  font-weight: 700;
  letter-spacing: 0.12em;
}

.welcome-kana {
  margin: 0;
  color: var(--ehtia-midnight);
  font-size: calc(var(--brand-title-size, 1rem) * 13 / 16);
}

.welcome-copy {
  margin: 0;
  color: var(--ehtia-gray);
  font-size: 0.82rem;
  line-height: 1.95;
  letter-spacing: 0.08em;
}

.welcome-actions {
  width: min(100%, 320px);
  margin-top: 0;
  display: grid;
  row-gap: 22px;
}

.welcome-secondary-actions {
  display: grid;
  gap: 12px;
}

.welcome-actions .button {
  width: 100%;
}

.invite-shell {
  min-height: calc(100vh - 120px);
  display: grid;
  grid-template-rows: auto auto auto;
  justify-items: center;
  align-content: center;
  row-gap: 40px;
}

.invite-shell-error .invite-title {
  margin-top: 0;
}

.brand-block,
.invite-copy-block,
.invite-actions-block {
  display: grid;
  justify-items: center;
  width: 100%;
}

.invite-copy-block {
  row-gap: 12px;
}

.invite-actions-block {
  row-gap: 0;
}

.invite-shell-error .invite-copy-block {
  row-gap: 16px;
}

.invite-shell .welcome-actions {
  row-gap: 12px;
}

.invite-shell .button {
  font-size: 0.88rem;
}

.invite-meta {
  margin: 0;
  color: var(--ehtia-gray);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.invite-title {
  margin: 0;
  color: var(--ehtia-midnight);
  line-height: 1.35;
  font-weight: 700;
  font-size: clamp(1rem, 1.6vw, 1.28rem);
  letter-spacing: 0.06em;
}

.invite-hint,
.invite-error {
  margin: 0;
  color: var(--ehtia-gray);
  font-size: 0.75rem;
  line-height: 1.9;
  letter-spacing: 0.05em;
  text-align: center;
}

.hidden {
  display: none;
}

@media (max-width: 720px) {
  .page {
    width: min(100vw - 48px, 100%);
    padding-top: 18px;
  }

  .invite-title {
    font-size: 0.92rem;
  }
}