/* =============================================
   Wing Theme — Components
   ============================================= */

/* --- Section base --- */
.section {
  padding: var(--sp-8) 0;
  position: relative;
  overflow: hidden;
}
.section__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  position: relative;
  z-index: var(--z-content);
}
.section__inner--narrow { max-width: var(--container-narrow); }

/* セクション番号 + ラベル(編集デザイン的) */
.section__chapter {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  margin-bottom: var(--sp-5);
}
.section__chapter--center {
  justify-content: center;
}
.section__chapter-num {
  font-family: var(--font-numeric);
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  color: var(--color-ink-mute);
}
.section__chapter-num::after {
  content: '';
  display: inline-block;
  width: 60px;
  height: 1px;
  background: var(--color-ink-mute);
  margin-left: var(--sp-2);
  vertical-align: middle;
}
.section__chapter-label {
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: lowercase;
  color: var(--color-ink-mute);
}

.section__label {
  display: inline-block;
  font-size: var(--fs-section);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-ink);
  margin-bottom: var(--sp-3);
  text-transform: lowercase;
}
.section__label--white {
  color: var(--color-white);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-3) var(--sp-6);
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: transform var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
  cursor: pointer;
}
.btn--primary {
  background: var(--color-ink);
  color: var(--color-white);
  border: none;
}
.btn--primary:hover {
  background: #1a1a1a;
  transform: translateY(-2px);
  opacity: 1;
}
.btn--ghost {
  background: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-ink);
}
.btn--ghost:hover {
  background: var(--color-ink);
  color: var(--color-white);
  opacity: 1;
}

/* --- Decoration shapes (4色楕円) --- */
.shape {
  position: absolute;
  z-index: var(--z-shape);
  pointer-events: none;
  user-select: none;
}
.shape--orange {
  background-image: url('../images/shape-orange.png');
  background-size: contain;
  background-repeat: no-repeat;
}
.shape--yellow {
  background-image: url('../images/shape-yellow.png');
  background-size: contain;
  background-repeat: no-repeat;
}
.shape--green {
  background-image: url('../images/shape-green.png');
  background-size: contain;
  background-repeat: no-repeat;
}
.shape--blue {
  background-image: url('../images/shape-blue.png');
  background-size: contain;
  background-repeat: no-repeat;
}

/* --- Page content (固定ページ・投稿) --- */
.page-content {
  padding: calc(var(--header-h) + var(--sp-7)) 0 var(--sp-7);
  background: var(--bg-day);
  position: relative;
  z-index: var(--z-content);
}
.page-content__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}
.page-content__inner--narrow {
  max-width: var(--container-narrow);
}

.page-header {
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--color-line);
}
.page-header__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.04em;
}
.page-header__date {
  display: inline-block;
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-ink-mute);
  margin-bottom: var(--sp-2);
}
.page-header__meta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
}
.page-header__category {
  display: inline-block;
  font-size: var(--fs-xsmall);
  letter-spacing: 0.15em;
  color: var(--wing-blue);
  border: 1px solid var(--wing-blue);
  padding: 2px var(--sp-2);
  border-radius: 999px;
  font-weight: 700;
}

.page-thumbnail { margin: 0 0 var(--sp-5); }

.page-body {
  font-size: var(--fs-body);
  line-height: 2;
  color: var(--color-ink);
}
.page-body p { margin-bottom: var(--sp-3); }
.page-body h2 {
  font-size: 1.5rem;
  margin: var(--sp-5) 0 var(--sp-3);
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--color-line);
}
.page-body h3 {
  font-size: 1.25rem;
  margin: var(--sp-4) 0 var(--sp-2);
}
.page-body a {
  color: var(--wing-blue);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.page-body ul, .page-body ol { margin: 0 0 var(--sp-3) var(--sp-3); }
.page-body ul { list-style: disc; }
.page-body ol { list-style: decimal; }
.page-body img { margin: var(--sp-3) 0; }

.page-nav {
  margin-top: var(--sp-6);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--color-line);
}

/* --- Pagination --- */
.pagination {
  margin-top: var(--sp-5);
  display: flex;
  justify-content: center;
}
.pagination .nav-links {
  display: flex;
  gap: var(--sp-2);
}
.pagination a, .pagination .current {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-size: var(--fs-small);
  font-weight: 700;
  border: 1px solid var(--color-line);
  border-radius: 50%;
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
}
.pagination a:hover {
  background: var(--color-ink);
  color: var(--color-white);
  opacity: 1;
}
.pagination .current {
  background: var(--color-ink);
  color: var(--color-white);
}

/* --- Reveal animation --- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}