:root {
  --sl-next-color-bg: #f7f7f2;
  --sl-next-color-text: #1b1f23;
  --sl-next-color-accent: #0080c8;
  --sl-next-color-border: #d5d9dd;
  --sl-next-space-md: 24px;
  --sl-next-space-lg: 48px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--sl-next-color-text);
  background: linear-gradient(180deg, #ffffff 0%, var(--sl-next-color-bg) 100%);
  font-family: "Hiragino Sans", "Noto Sans JP", sans-serif;
}

a {
  color: var(--sl-next-color-accent);
}

a:focus-visible {
  outline: 2px solid var(--sl-next-color-accent);
  outline-offset: 2px;
}

.sl-next-site-header,
.sl-next-site-footer,
.sl-next-main {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.sl-next-site-header__inner,
.sl-next-site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: var(--sl-next-space-md) 0;
}

.sl-next-site-header__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.sl-next-main {
  padding: var(--sl-next-space-lg) 0 72px;
}

.sl-next-entry {
  padding: 32px;
  border: 1px solid var(--sl-next-color-border);
  background: #ffffff;
  border-radius: 20px;
}

.sl-next-entry__title {
  margin: 0 0 24px;
}

.l-container {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.l-container--archive,
.l-container--page,
.p-single {
  padding: 40px 0 72px;
}

.p-page,
.p-single__content {
  background: #ffffff;
  border: 1px solid var(--sl-next-color-border);
  border-radius: 20px;
  padding: 32px;
}

.p-page__content,
.p-single__body {
  line-height: 1.8;
}

.p-archive__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.c-card {
  background: #ffffff;
  border: 1px solid var(--sl-next-color-border);
  border-radius: 16px;
  overflow: hidden;
}

.c-card__link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.c-card__thumbnail {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #eef2f5;
}

.c-card__thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.c-card__body {
  padding: 20px;
}

.c-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.c-card__tag {
  border: 1px solid var(--sl-next-color-border);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.875rem;
  text-decoration: none;
}

.c-card__overlay,
.p-single__thumbnail-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
}

.c-card__expired-text,
.p-single__expired-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #ffffff;
  font-weight: 700;
}

.p-single__thumbnail {
  position: relative;
  margin: 24px 0;
}

.p-single__thumbnail img,
.p-page__content img,
.p-single__body img {
  max-width: 100%;
  height: auto;
}

.p-case-single__meta,
.p-seminar-single__summary {
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
}

.c-page-title {
  margin-bottom: 32px;
}

.c-page-title__label {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--sl-next-color-accent);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.c-page-title__main {
  margin: 0;
}

.center {
  text-align: center;
}

.primary {
  color: var(--sl-next-color-accent);
}

.bold {
  font-weight: 700;
}

@media (max-width: 768px) {
  .sl-next-site-header__inner,
  .sl-next-site-footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .sl-next-entry {
    padding: 24px;
  }
}