:root {
  --ink: #202122;
  --charcoal: #292a2b;
  --paper: #f7f7f6;
  --soft: #e9e9e9;
  --yellow: #f1f100;
  --pink: #d80b65;
  --pink-soft: #f4e3eb;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.site-header {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  color: var(--ink);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 34px 8px 14px;
  font-size: 1.06rem;
  letter-spacing: 0.01em;
}

.site-status {
  margin-left: auto;
  color: rgba(32, 33, 34, 0.52);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.site-mark {
  position: relative;
  width: 20px;
  height: 17px;
  border: 2px solid currentColor;
}

.site-mark i {
  position: absolute;
  width: 7px;
  height: 7px;
  border: 2px solid currentColor;
  background: #fff;
}

.site-mark i:first-child {
  top: -5px;
  left: 3px;
}

.site-mark i:last-child {
  right: -5px;
  bottom: -4px;
}

main {
  width: 100%;
}

.hero-shell,
.letter-shell {
  width: 100%;
  margin: 0 auto;
  padding: clamp(42px, 7vw, 82px) clamp(20px, 8vw, 104px);
  background: var(--yellow);
}

.hero-shell {
  padding-top: clamp(38px, 6vw, 68px);
  padding-bottom: clamp(52px, 8vw, 92px);
}

.poster,
.letter {
  position: relative;
  width: min(720px, 100%);
  margin: 0 auto;
  background: var(--paper);
  border: 3px solid var(--ink);
  box-shadow: 8px 8px 0 var(--ink);
}

.poster {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 820px;
  padding: 54px 56px 42px;
  overflow: hidden;
}

.corner-dot {
  position: absolute;
  top: -42px;
  right: -42px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--pink-soft);
}

.logo {
  display: block;
  width: 245px;
  height: auto;
}

h1 {
  margin: 42px 0 25px;
  font-size: clamp(2.25rem, 4.3vw, 3.15rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: 0.012em;
  text-align: center;
  text-transform: uppercase;
}

.date-sticker {
  margin: 0;
  padding: 12px 22px;
  color: #fff;
  background: var(--pink);
  border: 2px solid var(--ink);
  box-shadow: 5px 6px 0 var(--ink);
  font-size: clamp(0.95rem, 2vw, 1.2rem);
  font-weight: 800;
  transform: rotate(-1.7deg);
}

.tagline {
  margin: 38px 0 0;
  color: #bc0058;
  font-size: clamp(1.55rem, 3.4vw, 2.3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.035em;
  text-align: center;
}

.rule {
  width: 100%;
  margin: 44px 0 28px;
  border-top: 2px solid var(--ink);
}

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  width: 100%;
}

.detail-card {
  min-height: 162px;
  padding: 22px;
  background: var(--soft);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
}

.detail-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.5;
}

.detail-card p + p {
  margin-top: 5px;
}

.detail-label,
.overline {
  color: var(--pink);
  font-size: 0.7rem !important;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.detail-label {
  margin-bottom: 13px !important;
}

.detail-label span {
  margin-right: 7px;
  font-size: 0.9rem;
}

.pill {
  display: inline-block;
  margin-top: 14px;
  padding: 5px 12px;
  color: var(--yellow);
  background: var(--ink);
  border-radius: 999px;
  font-size: 0.73rem;
}

.flyer-link {
  margin-top: 30px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-underline-offset: 4px;
  text-transform: uppercase;
}

.letter-shell {
  margin-top: 0;
  padding-top: clamp(36px, 7vw, 80px);
  padding-bottom: clamp(36px, 7vw, 80px);
}

.letter {
  width: min(720px, 100%);
  padding: clamp(34px, 7vw, 76px);
}

.letter-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--ink);
}

.overline {
  margin: 0;
}

h2,
.salutation,
.closing,
.signature-name {
  font-family: Georgia, "Times New Roman", serif;
}

h2 {
  margin: 0 0 42px;
  color: var(--pink);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.045em;
}

.letter-date {
  margin: 0;
  color: rgba(32, 33, 34, 0.62);
  font-size: 0.78rem;
}

.letter-body {
  padding-top: 42px;
}

.letter-body > p {
  max-width: 38rem;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.05rem;
  line-height: 1.78;
}

.letter-body > p + p {
  margin-top: 20px;
}

.salutation {
  margin-bottom: 26px !important;
  font-size: 1.25rem !important;
  font-style: italic;
}

.letter-body a {
  font-weight: 700;
  text-underline-offset: 3px;
}

.letter-highlight {
  margin-top: 36px !important;
  padding-top: 28px;
  color: var(--pink);
  border-top: 1px solid var(--ink);
  font-size: 1.2rem !important;
  font-weight: 700;
  line-height: 1.55 !important;
}

.signature {
  margin-top: 38px;
  padding-top: 30px;
  border-top: 2px solid var(--ink);
}

.closing {
  margin: 0 0 27px;
  color: var(--pink);
  font-size: 1.55rem;
  font-style: italic;
}

.signature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.signature-grid p {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.45;
}

.signature-grid .signature-name {
  margin-bottom: 4px;
  font-size: 1rem;
  font-weight: 700;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 44px 8px 55px;
  color: rgba(32, 33, 34, 0.6);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-footer p {
  margin: 0;
}

.site-footer .credit {
  margin-left: auto;
}

.credit a {
  color: var(--ink);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

@media (max-width: 680px) {
  .site-header,
  .site-footer {
    width: min(100% - 22px, 1120px);
  }

  .site-status {
    display: none;
  }

  .hero-shell,
  .letter-shell {
    width: 100%;
    padding-right: 12px;
    padding-left: 12px;
  }

  .poster,
  .letter {
    box-shadow: 5px 5px 0 var(--ink);
  }

  .poster {
    min-height: 0;
    padding: 42px 22px 32px;
  }

  .logo {
    width: min(215px, 78%);
  }

  h1 {
    margin-top: 34px;
  }

  .date-sticker {
    padding: 10px 12px;
    text-align: center;
  }

  .detail-grid,
  .signature-grid {
    grid-template-columns: 1fr;
  }

  .detail-card {
    min-height: 0;
  }

  .letter-shell {
    margin-top: 0;
  }

  .letter {
    padding: 34px 24px;
  }

  .letter-heading {
    gap: 14px;
  }

  .site-footer {
    align-items: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}