/* ==============================
   Theme Colors (日高本線版)
   ============================== */
:root {
  --color-main: #CA4F3C;   /* 雪の中の錆 */
  --color-accent: #7A8077; /* 冬枯れの原野 */
  --color-hover: #9A9287;  /* 凍土・枕木 */
  --color-bg: #F1F2F0;     /* 雪原と曇天 */
  --color-text: #2C2F2E;   /* 冷たい可読性 */
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 
    "BIZ UDPGothic",
    "Yu Gothic",
    "Hiragino Kaku Gothic Pro",
    "Hiragino Kaku Gothic ProN",
    "Noto Sans JP",
    sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  font-size: 16px;
}

/* ==============================
   Header
   ============================== */
.site-header {
  background-color: var(--color-main);
  color: #fff;
}

.header-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 16px;
}

.site-title {
  margin: 0;
  font-size: 1.5rem;
}

.site-title a {
  color: #fff;
  text-decoration: none;
}

.global-nav ul {
  list-style: none;
  display: flex;
  gap: 16px;
  margin-top: 8px;
}

.global-nav a {
  color: #ccc;
  text-decoration: none;
}

.global-nav a:hover {
  color: var(--color-hover);
}

/* ==============================
   Footer
   ============================== */
.site-footer {
  background-color: var(--color-main);
  color: #FFFFFF;
  text-align: center;
  padding: 16px;
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

/* ==============================
   Page Content
   ============================== */
.container {
  max-width: 1000px;
  margin: 24px auto;
  padding: 0 16px;
}

h1, h2 {
  margin-bottom: 16px;
}

h2 {
  border-left: 4px solid var(--color-main);
  padding-left: 8px;
  margin-top: 24px;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  color: var(--color-hover);
}

.button {
  display: inline-block;
  background-color: var(--color-main);
  color: #fff;
  padding: 8px 16px;
  text-decoration: none;
  border-radius: 4px;
  margin-top: 12px;
}

.button:hover {
  background-color: var(--color-hover);
}

.screenshot {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 16px 0;
}

/* ==============================
   Responsive (スマホ対応)
   ============================== */
@media screen and (max-width: 600px) {
  .site-title {
    font-size: 1.2rem;
  }

  .header-inner {
    padding: 12px 16px;
  }

  .global-nav ul {
    flex-direction: column;
    gap: 8px;
  }

  .global-nav a {
    display: block;
    padding: 8px 0;
  }

  h2 {
    font-size: 1.1rem;
  }

  .button {
    width: 100%;
    text-align: center;
  }

  .container {
    padding: 0 12px;
  }
}

/* ==============================
   ハンバーガーメニュー
   ============================== */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1000;
}

.nav-toggle span {
  display: block;
  height: 3px;
  background-color: #fff;
  border-radius: 2px;
  transition: all 0.3s;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media screen and (max-width: 600px) {
  .nav-toggle {
    display: flex;
  }

  .global-nav {
    position: fixed;
    top: 0;
    right: -220px;
    width: 220px;
    height: 100%;
    background-color: var(--color-main);
    padding-top: 64px; /* ヘッダー分 */
    transition: right 0.3s ease;
    z-index: 999;
  }

  .global-nav.open {
    right: 0;
  }

  .global-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .global-nav li a {
    display: block;
    padding: 16px;
    color: #fff;
  }

  .global-nav li a:hover {
    background-color: var(--color-hover);
  }
}

/* ==============================
   オーバーレイ
   ============================== */
.nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.5);
  z-index: 998;
  transition: opacity 0.3s ease;
}

.nav-overlay.active {
  display: block;
  opacity: 1;
}

/* ==============================
   トップ画像
   ============================== */
.top-image {
  width: 100%;
  height: auto;
  display: block;
  margin-bottom: 24px;
}

/* ==============================
   制作日誌/記事
   ============================== */
main.container article {
  background-color: #fff;
  border-left: 4px solid var(--color-main);
  padding: 16px;
  margin-bottom: 24px;
  color: var(--color-text);
}

main.container article time {
  display: block;
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 8px;
}

main.container article p {
  margin-bottom: 12px;
}

main.container article img.screenshot {
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid #ccc;
  border-radius: 4px;
}

/* 制作日誌2段構成 */
article.diary-entry {
  background-color: #fff;
  border-left: 4px solid var(--color-main);
  padding: 16px;
  margin-bottom: 24px;
}

/* タイトル + 日付 */
.diary-header h3 {
  margin-bottom: 4px;
  font-size: 1.2rem;
}

.diary-header time {
  font-size: 0.9rem;
  color: #666;
  display: block;
  margin-bottom: 12px;
}

/* 本文と画像の横並び（PC） */
.diary-body {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.diary-body .diary-image {
  flex: 1 1 40%;
}

.diary-body .diary-image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
  border: 1px solid #ccc;
}

.diary-body .diary-text {
  flex: 1 1 60%;
}

.diary-body .diary-text p {
  margin: 0;
}

/* ==============================
   スマホ対応
   ============================== */
@media screen and (max-width: 600px) {
  .diary-body {
    flex-direction: column;
  }

  .diary-body .diary-image,
  .diary-body .diary-text {
    flex: 1 1 100%;
  }
}

/* ==============================
   モーダル背景
   ============================== */
.image-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.8);
  justify-content: center;
  align-items: center;
  z-index: 2000;
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.image-modal.active {
  display: flex;
  opacity: 1;
}

.image-modal img {
  max-width: 90%;
  max-height: 90%;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

/* スクリーンショット最大2列レイアウト */
.screenshot-wrapper {
  display: flex;
  flex-wrap: wrap;       /* 狭い画面で折り返す */
  gap: 20px;             /* 画像間の余白 */
  margin-bottom: 40px;   /* セクション下の余白 */
}

.screenshot-item {
  flex: 1 1 calc(50% - 10px); /* 最大2列、余白を考慮 */
  box-sizing: border-box;
}

.screenshot-item img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
  border: 1px solid #ccc;
}

/* スマホ対応: 1列に折り返す */
@media screen and (max-width: 600px) {
  .screenshot-item {
    flex: 1 1 100%;
  }
}