:root {
  --c-main: #000;
  --c-sub: #636363;
  --c-blue: #0061aa;
  --c-line: #d4dbe1;
  --c-bg-sub: #f4f4f4;
  --c-white: #fff;
  --font: "Hiragino Kaku Gothic ProN", "ヒラギノ角ゴ ProN W3", "游ゴシック", YuGothic, Meiryo, メイリオ, sans-serif;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--c-white);
  color: var(--c-main);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: bottom;
}

a {
  color: inherit;
}

h1,
h2,
h3,
p,
ul,
dl,
dd {
  margin: 0;
  padding: 0;
}

ul {
  list-style: none;
}

/* header */
.header {
  padding: 10px 16px;
  text-align: center;
}

.header__title {
  line-height: 0;
}

.header__logo {
  display: inline-block;
  width: 130px;
}

.header__logo img {
  width: 100%;
}

/* main */
.main {
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px 80px;
}

.section {
  padding-top: 60px;
}

.section__title {
  margin-bottom: 40px;
  color: var(--c-blue);
  font-size: clamp(1.625rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
}

.section__title-sub {
  display: block;
  margin-top: 6px;
  color: var(--c-sub);
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.1em;
}

/* campaign list */
.campaign-list {
  display: grid;
  gap: 24px;
}

.campaign {
  display: block;
  height: 100%;
  border: 1px solid var(--c-line);
  text-decoration: none;
}

a.campaign {
  transition: border-color 0.2s, box-shadow 0.2s;
}

a.campaign:hover,
a.campaign:focus-visible {
  border-color: var(--c-blue);
  box-shadow: 0 4px 16px rgba(0, 97, 170, 0.15);
}

.campaign__image img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.campaign__body {
  padding: 20px 24px 24px;
}

.campaign__title {
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.6;
}

.campaign__lead {
  margin-top: 8px;
  font-weight: 700;
}

.campaign__period {
  margin: 8px 0 16px;
  color: var(--c-sub);
  font-size: 0.875rem;
}

.campaign-list--closed .campaign__period {
  margin-bottom: 0;
}

.campaign__note {
  margin-top: 8px;
  padding-left: 1em;
  text-indent: -1em;
  font-size: 0.875rem;
}

.campaign-list--open .campaign {
  display: flex;
  flex-direction: column;
}

.campaign-list--open .campaign__body {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.campaign__button {
  display: block;
  margin-top: auto;
  padding: 12px 16px;
  background: var(--c-blue);
  color: var(--c-white);
  font-weight: 700;
  text-align: center;
}

.campaign-list--closed .campaign {
  background: var(--c-bg-sub);
  border-color: var(--c-bg-sub);
}

.campaign-list--closed .campaign__title {
  font-size: 1rem;
}

/* contact */
.lead {
  text-align: center;
}

.faq {
  margin-top: 60px;
}

.faq__title,
.mail__title {
  margin-bottom: 24px;
  padding-bottom: 6px;
  border-bottom: 3px double var(--c-main);
  font-size: 1.25rem;
  font-weight: 700;
}

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

.faq__q,
.faq__a-head {
  font-weight: 700;
}

.faq__q {
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--c-main);
}

.faq__a {
  margin-top: 10px;
}

.faq__a p + p {
  margin-top: 8px;
}

.faq__env {
  margin-top: 8px;
  padding: 12px 16px;
  background: var(--c-bg-sub);
  font-size: 0.875rem;
}

.mail {
  margin-top: 60px;
}

.mail p + p,
.mail p + ul,
.mail p + .mail__fields {
  margin-top: 12px;
}

.mail__fields {
  display: inline-block;
  padding: 12px 24px;
  background: var(--c-bg-sub);
}

.mail__button {
  display: block;
  width: 100%;
  max-width: 360px;
  margin: 32px auto 0;
  padding: 16px;
  background: var(--c-blue);
  color: var(--c-white);
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  transition: opacity 0.2s;
}

.mail__button:hover,
.mail__button:focus-visible {
  opacity: 0.8;
}

/* footer */
.footer {
  padding: 40px 16px;
  background: var(--c-main);
  color: var(--c-white);
  text-align: center;
}

.footer__nav li {
  display: inline-block;
  padding: 5px 10px;
}

.footer__nav a {
  color: var(--c-white);
  text-decoration: none;
  border-bottom: 1px solid #888;
}

.footer__copy {
  margin-top: 20px;
  font-size: 0.75rem;
}

@media (min-width: 768px) {
  .campaign-list--open {
    grid-template-columns: repeat(2, 1fr);
  }

  .campaign-list__wide {
    grid-column: 1 / -1;
  }

  .campaign-list--open .campaign--with-image {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .campaign--with-image .campaign__image img {
    height: 100%;
  }

  .campaign--with-image .campaign__body {
    justify-content: center;
  }

  .campaign--with-image .campaign__button {
    margin-top: 0;
  }
}

@media (max-width: 767px) {
  body {
    font-size: 14px;
  }

  .header__logo {
    width: 100px;
  }

  .section {
    padding-top: 40px;
  }

  .section__title {
    margin-bottom: 28px;
  }

  .campaign__body {
    padding: 16px;
  }

  .footer {
    padding: 30px 16px;
    font-size: 13px;
  }
}