/* =========================================
 *  FONT FAMILY
 * ========================================= */

/* @font-face 定義 */
@font-face {
  font-family: "Bebas Neue";
  src: url("../fonts/BebasNeue-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "DM Serif Text";
  src: url("../fonts/DMSerifText-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "DM Serif Text";
  src: url("../fonts/DMSerifText-Italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Shippori Mincho";
  src: url("../fonts/ShipporiMincho-Regular-sub.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Shippori Mincho";
  src: url("../fonts/ShipporiMincho-Bold-sub.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* =========================================
 *  CSS変数
 * ========================================= */
:root {
  --font-hero-en: "Bebas Neue", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body-en: "DM Serif Text", "Times New Roman", serif;
  --font-ja: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  
  --color-bg-main: #f7f3eb;
  --color-bg-sidebar: #f9f4eb;
  --color-border: #e4dfd7;
  --color-text-main: #333333;
  --color-bg-transition: #ede8df;
  
  /* Primary グラデーションカラー */
  --color-primary-start: #d97757;
  --color-primary-end: #c4624a;
}

/* =========================================
 *  ベーススタイル
 * ========================================= */
body {
  font-family: var(--font-body-en);
  font-weight: 400;
  padding-top: 0;
  color: var(--color-text-main);
  background: var(--color-bg-main);
  letter-spacing: 0.02em;
  animation: fadein 0.15s ease-in-out forwards;
  opacity: 0;
}

@keyframes fadein {
  0% {
    opacity: 0;
    background: var(--color-bg-transition);
  }
  50% {
    opacity: 0.3;
    background: var(--color-bg-transition);
  }
  100% {
    opacity: 1;
    background: var(--color-bg-main);
  }
}

@keyframes fadeout {
  0% {
    opacity: 1;
    background: var(--color-bg-main);
  }
  50% {
    opacity: 0.3;
    background: var(--color-bg-transition);
  }
  100% {
    opacity: 0;
    background: var(--color-bg-transition);
  }
}

/* =========================================
 *  ユーティリティクラス
 * ========================================= */
.u-font-hero {
  font-family: var(--font-hero-en);
  font-weight: 400;
  letter-spacing: 0.04em;
}

.u-font-ja {
  font-family: var(--font-ja);
  font-weight: 400;
}

.u-font-ja-bold {
  font-family: var(--font-ja);
  font-weight: 700;
}

/* =========================================
 *  見出し
 * ========================================= */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-hero-en);
  font-weight: 400;
  margin-top: 0;
  margin-bottom: 1rem;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 3vw, 3rem);
}

h2 {
  font-size: clamp(1.5rem, 2vw, 1.8rem);
}

h3 {
  font-size: clamp(1.3rem, 1.8vw, 1.5rem);
}

h4 {
  font-size: clamp(1.1rem, 1.5vw, 1.3rem);
}

h5 {
  font-size: clamp(1rem, 1.3vw, 1.2rem);
}

h6 {
  font-size: clamp(0.9rem, 1.1vw, 1rem);
}

/* =========================================
 *  箇条書き
 * ========================================= */
ul, ol {
  margin: 0 0 1.5rem 0;
  padding-left: 2rem;
}

ul {
  list-style: disc;
}

ol {
  list-style: decimal;
}

li {
  margin-bottom: 0.5rem;
  font-weight: 400;
  letter-spacing: 0.02em;
}

ul ul, ol ol, ul ol, ol ul {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

/* =========================================
 *  テーブル
 * ========================================= */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-weight: 400;
}

th, td {
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

th {
  font-weight: 400;
  background: var(--color-bg-sidebar);
  font-family: var(--font-hero-en);
}

/* =========================================
 *  リンク
 * ========================================= */
a {
  color: var(--color-text-main);
  text-decoration: none;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

a:hover {
  text-decoration: none;
  background: linear-gradient(to right, var(--color-primary-start), var(--color-primary-end));
  background-size: 200% 100%;
  background-position: 100% 0;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradient-slide 0.5s ease forwards;
}

@keyframes gradient-slide {
  to {
    background-position: 0% 0;
  }
}

a:focus {
  outline: none;
}

/* クリック時の水滴エフェクト（ripple） */
a .ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(125, 184, 200, 0.5);
  transform: scale(0);
  pointer-events: none;
  opacity: 0.8;
}

@keyframes ripple-animation {
  0% {
    transform: scale(0);
    opacity: 0.8;
  }
  50% {
    opacity: 0.4;
  }
  100% {
    transform: scale(4);
    opacity: 0;
  }
}

/* カテゴリとタグボタンはグラデーションアニメーションを除外 */
.post-category,
.post-tag {
  background-image: none !important;
  -webkit-background-clip: unset !important;
  background-clip: unset !important;
  -webkit-text-fill-color: inherit !important;
  color: inherit !important;
}

.post-category:hover,
.post-tag:hover {
  background-image: none !important;
  -webkit-background-clip: unset !important;
  background-clip: unset !important;
  -webkit-text-fill-color: inherit !important;
  color: inherit !important;
  animation: none !important;
}

/* 記事カード内のリンクはグラデーションアニメーションを除外 */
.post-card a,
.post-card-title,
.post-card-title-ja {
  background-image: none !important;
  -webkit-background-clip: unset !important;
  background-clip: unset !important;
  -webkit-text-fill-color: inherit !important;
  color: inherit !important;
}

.post-card a:hover,
.post-card-title:hover,
.post-card-title-ja:hover {
  background-image: none !important;
  -webkit-background-clip: unset !important;
  background-clip: unset !important;
  -webkit-text-fill-color: inherit !important;
  color: inherit !important;
  animation: none !important;
  opacity: 0.8;
}

/* カテゴリとタグボタンは水滴エフェクトを除外 */
.post-category::after,
.post-tag::after {
  display: none;
}

/* =========================================
 *  その他のベース要素
 * ========================================= */
p {
  margin-bottom: 1.5rem;
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0.02em;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

strong, b {
  font-weight: 700;
}

em, i {
  font-style: italic;
}

code {
  background: var(--color-bg-sidebar);
  padding: 0.2rem 0.4rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
}

blockquote {
  margin: 1.5rem 0;
  padding-left: 1.5rem;
  border-left: 3px solid var(--color-border);
  font-style: italic;
  color: var(--color-text-main);
  opacity: 0.8;
}

/* =========================================
 *  レイアウト（共通）
 * ========================================= */
.front-page-wrap {
  display: grid;
  grid-template-columns: minmax(16rem, 20rem) minmax(0, 1fr);
  background: var(--color-bg-main);
}

.single-page-wrap {
  display: grid;
  grid-template-columns: minmax(16rem, 20rem) minmax(0, 1fr) minmax(16rem, 20rem);
  background: var(--color-bg-main);
}

/* =========================================
 *  モバイル対応（共通）
 * ========================================= */
@media (max-width: 768px) {
  body {
    padding-top: 3.5rem;
  }

  .front-page-wrap {
    display: block;
  }

  .single-page-wrap {
    display: block;
  }

  .u-hide-sm {
    display: none !important;
  }
}