/* Base Styles */

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Typography */
/* ===== Section Title ===== */
.section-title {
  position: relative;
  margin: 0 0 clamp(20px, 3vw, 32px);
  text-align: center;
  font-size: clamp(20px, 4vw, 28px);
  font-weight: 700;
  color: var(--color-text, #333);
  line-height: 1.4;
}

/* 下線装飾 */
.section-title::after {
  content: "";
  display: block;
  width: 60px;                 /* ラインの長さ */
  height: 2px;                 /* ラインの太さ */
  background-color: var(--color-primary, #734E30);
  margin: 8px auto 0;          /* 上余白8px、中央寄せ */
  border-radius: 2px;
}
.treat-card__head .section-title::after {
  display: none;
}
.symptoms .section-title::after {
  background-color: var(--color-primary-light);
}

/* Image Placeholder */
.image-placeholder {
    background: linear-gradient(135deg, #e0e0e0 0%, #f0f0f0 100%);
    border: 2px dashed #ccc;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: var(--font-weight-medium);
    text-align: center;
    transition: var(--transition-normal);
    border-radius: var(--border-radius-md);
    min-height: 200px;
}

.image-placeholder:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center { text-align: center; }
.text-left   { text-align: left;   }
.text-right  { text-align: right;  }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}
.slide-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}
.slide-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Loading Animation */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}
.pulse { animation: pulse 0.3s ease; }

/* Ripple Effect */
@keyframes ripple {
    0% { transform: scale(0); opacity: 1; }
    100% { transform: scale(4); opacity: 0; }
}
.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.6);
    transform: scale(0);
    animation: ripple 0.6s linear;
    pointer-events: none;
}

/* ===== ステップ表示用：ステッガー（順番に出す） ===== */
.stagger > *{ opacity:0; transform: translateY(10px); }
.stagger.visible > *{ animation: staggerIn .6s ease forwards; }
.stagger.visible > *:nth-child(1){ animation-delay: .02s; }
.stagger.visible > *:nth-child(2){ animation-delay: .08s; }
.stagger.visible > *:nth-child(3){ animation-delay: .14s; }
.stagger.visible > *:nth-child(4){ animation-delay: .20s; }
.stagger.visible > *:nth-child(5){ animation-delay: .26s; }
@keyframes staggerIn{ to{ opacity:1; transform: translateY(0); } }

/* ボタン素材 */
:root{
  --btn-radius: 10px;
  --btn-fz: clamp(15px, 1.6vw, 18px);
  --btn-pad-y: 0.85em;
  --btn-pad-x: 1.4em;
  --btn-shadow: 0 2px 6px rgba(0,0,0,.12);
  --btn-shadow-active: 0 1px 3px rgba(0,0,0,.18);
  --btn-ring: 3px solid var(--color-primary);
  --btn-min-tap: 44px; /* アクセシビリティ（タップ領域） */
}

/* ===== Default target（既存のHTMLそのまま対応） ===== */
.button-wrap{display:inline-block}
.button-wrap > a{
  --_bg: var(--color-secondary-brown, #734E30);
  --_fg: #fff;
  --_bd: transparent;

  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55em;
  min-height:var(--btn-min-tap);
  padding:var(--btn-pad-y) var(--btn-pad-x);
  border:2px solid var(--_bd);
  border-radius:var(--btn-radius);
  background:var(--_bg);
  color:var(--_fg);
  font-weight:700;
  font-size:var(--btn-fz);
  line-height:1;
  box-shadow:var(--btn-shadow);
  text-decoration:none;
  transition:transform .06s ease, box-shadow .2s ease, background-color .2s ease, color .2s ease, border-color .2s ease;
  -webkit-tap-highlight-color: transparent;
}

/* Hover/Active（ポインタあり環境のみ） */
@media (hover:hover){
  .button-wrap > a:hover{transform:translateY(-1px); box-shadow:0 4px 12px rgba(0,0,0,.16)}
  .button-wrap > a:active{transform:translateY(0); box-shadow:var(--btn-shadow-active)}
}

/* Keyboard focus */
.button-wrap > a:focus-visible{
  outline:var(--btn-ring);
  outline-offset:3px;
  border-color:transparent;
}

/* Motion配慮 */
@media (prefers-reduced-motion: reduce){
  .button-wrap > a{transition:none}
}

/* ===== BEM-style utility（任意。a 要素に .btn を付けると拡張が楽） ===== */
.btn{}

/* バリエーション */
.btn--wood{   --_bg: var(--color-secondary-brown, #734E30); --_fg:#fff; --_bd:transparent; }
.btn--primary{--_bg: var(--color-primary, #00A4AC); --_fg:#fff; --_bd:transparent; }
.btn--green{  --_bg: var(--color-secondary-green, #008249); --_fg:#fff; --_bd:transparent; }
.btn--outline{--_bg: transparent; --_fg: var(--color-secondary-brown, #734E30); --_bd: currentColor; box-shadow:none; }
.btn--light{  --_bg: var(--color-bg-alt, #FAF4EF); --_fg: var(--color-secondary-brown, #734E30); --_bd: var(--color-secondary-brown, #734E30); }

/* サイズ */
.btn--sm{ --btn-fz: clamp(14px, 1.4vw, 16px); --btn-pad-y:.7em; --btn-pad-x:1.1em }
.btn--lg{ --btn-fz: clamp(16px, 1.9vw, 20px); --btn-pad-y:1.0em; --btn-pad-x:1.6em }

/* 矢印・アイコン（装飾） */
.btn--arrow::after{
  content: "›";
  font-size: 1.1em;
  transform: translateY(-1px);
  transition: transform .15s ease;
}
@media (hover:hover){
  .button-wrap > a.btn--arrow:hover::after{ transform: translate(2px, -1px); }
}

/* 無効化 */
.button-wrap > a[aria-disabled="true"],
.button-wrap > a.is-disabled{
  opacity:.55; pointer-events:none; filter:grayscale(.1);
}

/* “押したくなる” 微アレンジ（オプション） */
.btn--pop{
  background:linear-gradient(180deg, color-mix(in srgb, var(--_bg) 96%, #fff 4%), var(--_bg));
}
@media (hover:hover){
  .btn--pulse{ animation: btnPulse 2.2s ease-in-out infinite }
  @keyframes btnPulse{
    0%,100%{ box-shadow: var(--btn-shadow) }
    50%{    box-shadow: 0 6px 18px rgba(0,164,172,.25) }
  }
}

/* 症状ページのセクションタイトル用アンダーライン */
.u-underline-primary{
  text-decoration: underline;
  text-decoration-color: var(--color-primary, #00A4AC);
  text-underline-offset: .35em;
  text-decoration-thickness: 2px;
  text-decoration-skip-ink: auto;
}
@supports not (text-decoration-thickness: 3px){
  .u-underline-primary{
    text-decoration: none;
    position: relative;
  }
  .u-underline-primary::after{
    content:"";
    position:absolute;
    left:0;
    bottom:-.25em;
    width: 7.5em;
    height: 3px;
    background: var(--color-primary, #00A4AC);
    border-radius: 2px;
  }
}

/* ナビリンクは常にクリックできるようにする */
.nav__link { position: relative; pointer-events: auto; }
.nav__link::before,
.nav__link::after { pointer-events: none; }  /* 疑似要素はクリックを拾わない */

/* ===== News (cards) ===== */
.news { padding: clamp(48px, 7vw, 88px) 0; }
.news__grid{
  display:grid; gap: clamp(16px, 2.8vw, 28px);
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.news-card{
  background:#fff; border:1px solid var(--color-border,#E5E7EB);
  border-radius: 16px; overflow: clip;
  box-shadow: 0 6px 16px rgba(0,0,0,.05);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.news-card:hover{
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0,0,0,.08);
  border-color: color-mix(in srgb, var(--color-primary,#00A4AC) 30%, #E5E7EB 70%);
}

.news-card__inner{ display:block; height:100%; color:inherit; text-decoration:none; }

.news-card__thumb{
  position:relative; aspect-ratio: 16/9; background:#F3F4F6;
  display:flex; align-items:center; justify-content:center;
}
.news-card__thumb img{ width:100%; height:100%; object-fit:cover; display:block; }
.news-card__ph{
  font-weight:800; letter-spacing:.08em; opacity:.4; display: none;
}
.news-card__cat{
  position:absolute; left:12px; top:12px;
  display:inline-block; font-size:12px; font-weight:700; color:#fff;
  background: color-mix(in srgb, var(--color-primary,#00A4AC) 90%, #000 10%);
  padding:.3em .6em; border-radius:9999px;
  box-shadow:0 4px 10px rgba(0,0,0,.12);
}

.news-card__body{ padding: 16px 18px 18px; display:grid; gap:10px; }
.news-card__date{
  font-size:12px; color: var(--color-text-light,#666);
}
.news-card__title{
  margin:0; font-size: clamp(16px, 2.2vw, 18px); line-height:1.5;
}
.news-card__excerpt{
  margin:0; color: var(--color-text,#333);
  font-size: 14px; line-height:1.8;
}
.news-card__meta{
  margin-top: 4px; display:flex; align-items:center; justify-content:space-between;
  gap: 8px; font-size:12px; color: var(--color-text-light,#666);
}
.news-card__more{
  display:inline-flex; align-items:center; gap:6px; font-weight:700;
  color: var(--color-primary,#00A4AC);
}
.news-card__more::after{
  content:"→"; transform: translateX(0); transition: transform .2s ease;
}
.news-card:hover .news-card__more::after{ transform: translateX(2px); }

/* “もっと見る” ボタンのセンター */
.u-center{ text-align:center; }
.mt-4{ margin-top: 1.5rem; }

/* ===== Single Post ===== */
.post-hero__media{
  position:relative; aspect-ratio: 16/9; background:#F3F4F6;
  display:flex; align-items:center; justify-content:center;
}
.post-hero__media img{ width:100%; height:100%; object-fit:cover; display:block; }
.post-hero__ph{ font-weight:800; letter-spacing:.08em; opacity:.35; display: none;}
.post-hero__cat{
  position:absolute; left:18px; top:18px; font-size:12px; font-weight:700; color:#fff;
  background: color-mix(in srgb, var(--color-primary,#00A4AC) 90%, #000 10%);
  padding:.35em .7em; border-radius:9999px; box-shadow:0 4px 12px rgba(0,0,0,.14);
}
.post-title{
  margin: clamp(16px, 2.6vw, 24px) 0 4px;
  font-size: clamp(22px, 3.4vw, 34px); line-height:1.35;
}
.post-meta{ color: var(--color-text-light,#666); font-size: 14px; }
.post-meta .sep{ margin: 0 .5em; opacity:.5; }

.post-body{ 
  padding: clamp(32px, 6vw, 72px) 0;
  padding-top: 0;
 }
.entry-content{
  max-width: 760px; margin: 0 auto;
  font-size: 16px; line-height: 1.9; color: var(--color-text,#333);
}
.entry-content p{ margin: 1.1em 0; }
.entry-content h2{ margin: 1.6em 0 .6em; font-size: 1.6em; border-left: 4px solid var(--color-primary,#00A4AC); padding-left: .6em; }
.entry-content h3{ margin: 1.4em 0 .5em; font-size: 1.25em; }
.entry-content ul, .entry-content ol{ padding-left: 1.2em; margin: 1em 0; }
.entry-content img{ max-width:100%; height:auto; border-radius: 12px; }
.entry-content blockquote{
  margin: 1.2em 0; padding: 1em 1.2em; background:#FAFAFA; border-left: 3px solid var(--color-secondary-brown,#734E30);
}

.post-share{ max-width:760px; margin: 28px auto 0; display:flex; gap:10px; flex-wrap:wrap; }
.btn--ghost{
  display:inline-flex; align-items:center; gap:8px; padding:.65em 1em;
  border:1px solid var(--color-border,#E5E7EB); border-radius:9999px; background:#fff;
  transition:.2s; font-weight:700;
}
.btn--ghost:hover{ border-color: var(--color-primary,#00A4AC); color: var(--color-primary,#00A4AC); }

.post-pager{ max-width:760px; margin: 28px auto 0; display:flex; justify-content:space-between; gap:10px; }
.post-pager a{ color: var(--color-primary,#00A4AC); font-weight:700; }


.article-height {
  min-height: 800px;
}