:root {
  color-scheme: light;
  --ground: #f1f1ed;
  --paper: #fffefa;
  --ink: #18304e;
  --muted: #51647b;
  --blue: #006cea;
  --blue-deep: #075cce;
}

* { box-sizing: border-box; }
html { min-height: 100%; }
body { margin: 0; min-width: 320px; background: var(--ground); color: var(--ink); font-family: "DM Sans", Arial, sans-serif; }
button, input { font: inherit; }

.page-frame { width: min(100% - 48px, 1420px); min-height: 100svh; margin: auto; display: grid; grid-template-rows: auto minmax(0, 1fr); gap: clamp(12px, 2vh, 20px); padding: clamp(18px, 2.8vh, 30px) 0 14px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font: 700 24px/1 "Outfit", Arial, sans-serif; letter-spacing: -.055em; white-space: nowrap; }
.brand img { display: block; width: 42px; height: auto; }
.brand-period { color: var(--blue); }
.site-address { color: var(--muted); font-size: 14px; font-weight: 600; }

.card { min-height: 0; display: grid; grid-template-columns: 1fr .91fr; background: var(--paper); }
.card-front { min-width: 0; display: flex; flex-direction: column; justify-content: space-between; padding: clamp(34px, 5.5vw, 84px); }
.card-front__content { margin: auto 0; }
h1 { max-width: 700px; margin: 0; color: var(--ink); font: 600 clamp(52px, 5.7vw, 91px)/.98 "Outfit", Arial, sans-serif; letter-spacing: -.065em; }
.introduction { max-width: 520px; margin: 27px 0 0; color: var(--muted); font-size: clamp(16px, 1.25vw, 18px); line-height: 1.58; }
.name-demo { max-width: 380px; margin-top: clamp(28px, 4.2vh, 40px); }
.name-demo label { display: block; margin-bottom: 9px; font-size: 14px; font-weight: 700; }
.name-demo input { display: block; width: 100%; height: 52px; border: 0; border-radius: 0; padding: 0 15px; outline: 2px solid #d4dfeb; outline-offset: -2px; background: #f2f6fa; color: var(--ink); font-size: 16px; transition: outline-color .18s ease, background-color .18s ease; }
.name-demo input::placeholder { color: #5c6d82; opacity: 1; }
.name-demo input:focus-visible { outline: 3px solid var(--blue-deep); outline-offset: 2px; background: #fff; }
.name-demo p { margin: 8px 0 0; color: var(--muted); font-size: 13px; line-height: 1.35; }
.order-link { min-height: 54px; width: fit-content; display: inline-flex; align-items: center; justify-content: center; margin-top: 27px; padding: 0 23px; background: var(--blue); color: #fff; font: 600 16px/1 "Outfit", Arial, sans-serif; text-align: center; text-decoration: none; transition: background-color .18s ease, transform .18s ease; }
.order-link:hover { background: var(--blue-deep); }
.order-link:active { transform: translateY(2px); }
.order-link:focus-visible { outline: 3px solid var(--ink); outline-offset: 4px; }

.card-back { min-width: 0; display: flex; flex-direction: column; align-items: center; gap: 14px; padding: clamp(26px, 3.2vw, 48px); background: var(--blue); color: #fff; }
.card-back__top { width: 100%; display: flex; justify-content: space-between; gap: 16px; font-size: 14px; font-weight: 600; }
.sample { width: min(100%, 390px); min-height: 0; aspect-ratio: 5 / 6.7; display: flex; flex-direction: column; justify-content: space-between; margin: auto 0; padding: clamp(25px, 3vw, 41px); background: var(--paper); color: var(--ink); }
.sample__address { margin: 0; overflow-wrap: anywhere; color: var(--blue-deep); font-size: clamp(13px, 1.1vw, 15px); font-weight: 700; }
.sample__message { margin: auto 0; }
.sample__to { margin: 0 0 12px; overflow: hidden; color: var(--muted); font-size: clamp(16px, 1.5vw, 20px); white-space: nowrap; text-overflow: ellipsis; }
.sample h2 { margin: 0; font: 600 clamp(34px, 3.4vw, 50px)/1 "Outfit", Arial, sans-serif; letter-spacing: -.055em; }
.sample__wish { max-width: 31ch; margin: 19px 0 0; color: var(--muted); font-size: clamp(14px, 1.1vw, 16px); line-height: 1.5; }
.sample__signoff { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; font-size: 14px; }
.sample__signoff span:last-child { color: var(--blue-deep); font: 600 19px/1 "Outfit", Arial, sans-serif; letter-spacing: -.04em; }

@media (max-width: 1100px) {
  .card { grid-template-columns: 1fr .9fr; }
  .card-front { padding: clamp(28px, 4vw, 50px); }
  h1 { font-size: clamp(46px, 5.8vw, 70px); }
  .card-back { padding: 28px; }
  .sample { width: min(100%, 360px); aspect-ratio: 5 / 6.5; padding: 28px; }
  .sample h2 { font-size: clamp(31px, 3.7vw, 43px); }
}

@media (max-width: 720px) {
  .page-frame { width: min(100% - 26px, 540px); gap: 10px; padding: 12px 0 9px; }
  .brand { gap: 7px; font-size: 20px; }
  .brand img { width: 34px; }
  .site-address { font-size: 11px; }
  .card { display: flex; flex-direction: column; }
  .card-front { flex: 1 1 auto; padding: clamp(21px, 4vw, 30px); }
  .card-front__content { margin: auto 0; }
  h1 { font-size: clamp(37px, 10.3vw, 55px); }
  .introduction { margin-top: 13px; font-size: 14px; line-height: 1.48; }
  .name-demo { margin-top: 19px; }
  .name-demo label { margin-bottom: 6px; font-size: 13px; }
  .name-demo input { height: 45px; font-size: 14px; }
  .name-demo p { margin-top: 5px; font-size: 13px; }
  .order-link { min-height: 47px; margin-top: 18px; padding: 0 17px; font-size: 14px; }
  .card-back { flex: 0 0 240px; gap: 7px; padding: 14px 20px; }
  .card-back__top { font-size: 12px; }
  .sample { width: min(100%, 310px); height: 175px; aspect-ratio: auto; padding: 15px 19px; }
  .sample__address { font-size: 13px; }
  .sample__to { margin-bottom: 2px; font-size: 14px; }
  .sample h2 { font-size: 28px; }
  .sample__wish { display: none; }
  .sample__signoff { display: none; }
}

@media (max-width: 390px) and (max-height: 720px) {
  .page-frame { gap: 7px; }
  .card-front { padding: 17px 20px; }
  h1 { font-size: 37px; }
  .introduction { margin-top: 9px; font-size: 14px; line-height: 1.4; }
  .name-demo { margin-top: 12px; }
  .name-demo input { height: 44px; }
  .order-link { min-height: 44px; margin-top: 12px; }
  .card-back { flex-basis: 218px; padding: 11px 17px; }
  .sample { height: 158px; }
  .sample h2 { font-size: 25px; }
}

@media (max-width: 350px) and (max-height: 700px) {
  .card-back { flex-basis: 190px; gap: 5px; padding: 8px 12px; }
  .sample { height: 140px; padding: 10px 14px; }
  .sample h2 { font-size: 23px; }
}

@media (max-height: 570px) and (min-width: 721px) {
  .page-frame { gap: 7px; padding-top: 9px; padding-bottom: 6px; }
  .card-front { padding-top: 20px; padding-bottom: 20px; }
  h1 { font-size: clamp(40px, 5vw, 63px); }
  .introduction { margin-top: 12px; font-size: 14px; line-height: 1.4; }
  .name-demo { margin-top: 15px; }
  .order-link { margin-top: 16px; min-height: 45px; }
  .card-back { padding: 16px; gap: 5px; }
  .sample { width: min(100%, 320px); height: min(100%, 355px); aspect-ratio: auto; padding: 19px; }
  .sample__wish { margin-top: 10px; }
}

@media (max-height: 500px) and (max-width: 720px) and (orientation: landscape) {
  .page-frame { width: min(100% - 20px, 780px); gap: 6px; padding: 7px 0 5px; }
  .brand { font-size: 17px; }
  .brand img { width: 26px; }
  .card { display: grid; grid-template-columns: 1fr .82fr; }
  .card-front { padding: 15px 19px; }
  h1 { font-size: clamp(31px, 5vw, 42px); }
  .introduction { margin-top: 6px; font-size: 11px; line-height: 1.35; }
  .name-demo { margin-top: 9px; }
  .name-demo label { margin-bottom: 4px; font-size: 11px; }
  .name-demo input { height: 44px; font-size: 12px; }
  .name-demo p { display: none; }
  .order-link { min-height: 44px; margin-top: 9px; font-size: 12px; }
  .card-back { padding: 12px; }
  .card-back__top { font-size: 10px; }
  .sample { width: min(100%, 230px); height: 215px; padding: 14px; }
  .sample h2 { font-size: 26px; }
  .sample__wish { font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}