/* Hapin — minimal site
   Brand source: Hapin Visual Style Guidelines V02 (June 2026)
   Dark background #111111, blue→green gradient #4A89FF → #38FCA3, Fredoka typeface */

:root {
  --bg: #111111;
  --bg-elevated: #1a1a1a;
  --text: #ffffff;
  --text-muted: #a3a3a3;
  --hairline: #2a2a2a;
  --blue: #4a89ff;
  --green: #38fca3;
  --gradient: linear-gradient(90deg, var(--blue) 0%, var(--green) 100%);
  --focus: #38fca3;
  --max-width: 720px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Fredoka', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--green);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px clamp(20px, 5vw, 48px);
  position: relative;
  z-index: 20;
}

.site-header__logo img {
  height: 28px;
  display: block;
}

.menu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  align-items: flex-end;
}

.menu-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease, width 0.25s ease;
}

.menu-toggle span:nth-child(1) { width: 24px; }
.menu-toggle span:nth-child(2) { width: 18px; }
.menu-toggle span:nth-child(3) { width: 24px; }

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  width: 24px;
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  width: 24px;
}

.nav-panel {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease;
}

.nav-panel.is-open {
  opacity: 1;
  visibility: visible;
}

.nav-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  text-align: center;
}

.nav-panel__list li {
  margin: 0 0 28px;
}

.nav-panel__list li:last-child {
  margin-bottom: 0;
}

.nav-panel__list a {
  color: var(--text);
  font-size: 28px;
  font-weight: 500;
}

.nav-panel__list a.is-current {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px 80px;
}

.hero {
  text-align: center;
  max-width: 560px;
}

.hero__mark {
  width: clamp(64px, 14vw, 96px);
  margin: 0 auto 28px;
  display: block;
}

.hero__tagline {
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 16px;
}

.hero__tagline .accent {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 15px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 8px;
}

.hero__status::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gradient);
}

.doc {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 8px 24px 96px;
  width: 100%;
}

.doc__eyebrow {
  color: var(--text-muted);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 8px;
}

.doc h1 {
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 600;
  margin: 0 0 6px;
}

.doc__updated {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0 0 40px;
}

.accordion {
  border-top: 1px solid var(--hairline);
}

.accordion-item {
  border-bottom: 1px solid var(--hairline);
}

.accordion-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 17px;
  font-weight: 500;
}

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

.accordion-item summary .plus {
  font-size: 20px;
  color: var(--green);
  transition: transform 0.2s ease;
  flex-shrink: 0;
  margin-left: 16px;
}

.accordion-item[open] summary .plus {
  transform: rotate(45deg);
}

.accordion-item__body {
  padding: 0 4px 24px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.7;
}

.accordion-item__body p {
  margin: 0 0 14px;
}

.accordion-item__body ul {
  margin: 0 0 14px;
  padding-left: 20px;
}

.accordion-item__body li {
  margin-bottom: 8px;
}

.draft-notice {
  background: var(--bg-elevated);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 16px 20px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 40px;
  line-height: 1.6;
}

.draft-notice strong {
  color: var(--text);
}

.contact-list {
  list-style: none;
  margin: 0 0 40px;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 4px;
  border-bottom: 1px solid var(--hairline);
  font-size: 16px;
}

.contact-list__icon {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  flex-shrink: 0;
  color: var(--text-muted);
}

.contact-list a {
  color: var(--text);
}

.contact-list address {
  font-style: normal;
  color: var(--text);
}

.site-footer {
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 13px;
}

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