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

:root {
  --green-dark:  #1e4d2b;
  --green:       #2d6a3f;
  --green-light: #4a8c5c;
  --burgundy:    #7d2035;
  --gold:        #c9a84c;
  --black:       #1a1a1a;
  --bg:          #f7f5f0;
  --card-bg:     #ffffff;
  --text:        #1a2e1f;
  --text-light:  #7a8f7e;
  --card-radius: 12px;
  --card-gap:    16px;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ===== Header ===== */
.site-header {
  background-color: var(--green-dark);
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent 0px, transparent 18px,
      rgba(201,168,76,0.35) 18px, rgba(201,168,76,0.35) 20px,
      transparent 20px, transparent 38px,
      rgba(125,32,53,0.45) 38px, rgba(125,32,53,0.45) 41px,
      transparent 41px, transparent 58px,
      rgba(201,168,76,0.35) 58px, rgba(201,168,76,0.35) 60px
    ),
    repeating-linear-gradient(
      90deg,
      transparent 0px, transparent 18px,
      rgba(201,168,76,0.35) 18px, rgba(201,168,76,0.35) 20px,
      transparent 20px, transparent 38px,
      rgba(125,32,53,0.45) 38px, rgba(125,32,53,0.45) 41px,
      transparent 41px, transparent 58px,
      rgba(201,168,76,0.35) 58px, rgba(201,168,76,0.35) 60px
    );
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.site-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 68px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.site-title {
  font-family: 'Kiwi Maru', sans-serif;
  font-size: 30px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 2px;
  line-height: 1;
  text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.site-subtitle {
  font-size: 12px;
  color: rgba(255,255,255,0.75);
  font-weight: 400;
  padding-top: 4px;
  letter-spacing: 0.5px;
}

/* ===== Desktop Nav ===== */
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.site-nav a {
  color: rgba(255,255,255,0.88);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 6px;
  letter-spacing: 0.5px;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}

.site-nav a:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
}

/* ===== Hamburger (mobile only) ===== */
.nav-toggle { display: none; }

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  margin-left: auto;
  padding: 4px;
}

.hamburger span {
  display: block;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle:checked ~ .site-nav-mobile { display: flex; }
.nav-toggle:checked + label span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle:checked + label span:nth-child(2) { opacity: 0; }
.nav-toggle:checked + label span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Mobile Nav ===== */
.site-nav-mobile {
  display: none;
  flex-direction: column;
  background: rgba(0,0,0,0.25);
  padding: 8px 0;
}

.site-nav-mobile a {
  color: rgba(255,255,255,0.9);
  font-size: 14px;
  font-weight: 700;
  padding: 12px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background 0.2s;
}

.site-nav-mobile a:hover {
  background: rgba(255,255,255,0.1);
}

/* ===== Tartan accent bar ===== */
.tartan-bar {
  height: 5px;
  background: repeating-linear-gradient(
    90deg,
    var(--green-dark) 0px, var(--green-dark) 20px,
    var(--gold)       20px, var(--gold)       24px,
    var(--green-dark) 24px, var(--green-dark) 44px,
    var(--burgundy)   44px, var(--burgundy)   50px
  );
}

/* ===== Comic Gallery ===== */
.comic-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--card-gap);
  padding: 28px 24px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  flex: 1;
}

.comic-card {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: 0 2px 10px rgba(30,77,43,0.10);
  border: 1px solid rgba(30,77,43,0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.comic-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 28px rgba(30,77,43,0.18);
}

.comic-card img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.4s ease;
}

.comic-card:hover img {
  transform: scale(1.02);
}

.comic-card-overlay {
  padding: 10px 14px 13px;
  background: var(--card-bg);
  border-top: 3px solid var(--gold);
}

.comic-card-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 3px;
}

.comic-card-date {
  font-size: 11px;
  color: var(--text-light);
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 36px 16px;
}

.pagination-btn {
  background: var(--green-dark);
  color: #fff;
  padding: 10px 28px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  border-bottom: 3px solid var(--gold);
  transition: background 0.2s, transform 0.2s;
}

.pagination-btn:hover {
  background: var(--green);
  transform: translateY(-1px);
}

.pagination-info {
  font-size: 13px;
  color: var(--text-light);
  font-weight: 500;
}

/* ===== Single Post ===== */
.comic-single {
  max-width: 680px;
  margin: 48px auto;
  padding: 0 20px;
}

.comic-single-title {
  font-family: 'M PLUS 1p', sans-serif;
  font-size: 26px;
  font-weight: 900;
  line-height: 1.5;
  margin-bottom: 8px;
  color: var(--green-dark);
}

.comic-single-date {
  font-size: 13px;
  color: var(--text-light);
  display: block;
  margin-bottom: 28px;
}

.comic-single-content img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(30,77,43,0.12);
}

.comic-single-nav {
  margin-top: 48px;
}

.btn {
  display: inline-block;
  background: var(--green-dark);
  color: #fff;
  padding: 10px 28px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  border-bottom: 3px solid var(--gold);
  transition: background 0.2s, transform 0.2s;
}

.btn:hover {
  background: var(--green);
  transform: translateY(-1px);
}

/* ===== Footer ===== */
.site-footer {
  background-color: var(--green-dark);
  background-image:
    repeating-linear-gradient(
      90deg,
      transparent 0px, transparent 18px,
      rgba(201,168,76,0.25) 18px, rgba(201,168,76,0.25) 20px,
      transparent 20px, transparent 38px,
      rgba(125,32,53,0.3) 38px, rgba(125,32,53,0.3) 41px
    );
  color: rgba(255,255,255,0.8);
  text-align: center;
  padding: 20px;
  font-size: 13px;
  margin-top: auto;
}

/* ===== Content Pages (授業資料・記事) ===== */
.content-page {
  max-width: 860px;
  margin: 48px auto;
  padding: 0 28px;
}

.content-title {
  font-family: 'M PLUS 1p', sans-serif;
  font-size: 28px;
  color: var(--green-dark);
  line-height: 1.5;
  margin-bottom: 8px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--gold);
}

.content-date {
  display: block;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 36px;
}

/* Body typography */
.content-body {
  font-size: 17px;
  line-height: 1.9;
  color: var(--text);
}

.content-body p {
  margin-bottom: 1.4em;
}

.content-body h1,
.content-body h2,
.content-body h3,
.content-body h4 {
  font-family: 'M PLUS 1p', sans-serif;
  color: var(--green-dark);
  line-height: 1.4;
  margin-top: 2em;
  margin-bottom: 0.6em;
}

.content-body h2 {
  font-size: 22px;
  padding-left: 12px;
  border-left: 4px solid var(--green);
}

.content-body h3 {
  font-size: 19px;
  padding-left: 10px;
  border-left: 3px solid var(--gold);
}

.content-body h4 {
  font-size: 17px;
}

.content-body ul,
.content-body ol {
  padding-left: 1.8em;
  margin-bottom: 1.4em;
}

.content-body li {
  margin-bottom: 0.5em;
  line-height: 1.8;
}

.content-body a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.content-body a:hover {
  color: var(--green-dark);
}

.content-body img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.6em auto;
  border-radius: 8px;
  box-shadow: 0 3px 16px rgba(30,77,43,0.12);
}

.content-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 15px;
}

.content-body th {
  background: var(--green-dark);
  color: #fff;
  padding: 10px 14px;
  text-align: left;
  font-weight: 700;
}

.content-body td {
  padding: 9px 14px;
  border-bottom: 1px solid #e0e0d8;
}

.content-body tr:nth-child(even) td {
  background: #f3f7f4;
}

.content-body code {
  background: #f0f4f1;
  color: var(--burgundy);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
  font-family: 'Courier New', monospace;
}

.content-body pre {
  background: #1e2e22;
  color: #d4e8d0;
  padding: 20px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.6em 0;
  font-size: 14px;
  line-height: 1.7;
}

.content-body pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

.content-body blockquote {
  border-left: 4px solid var(--gold);
  background: #faf7ee;
  padding: 14px 20px;
  margin: 1.6em 0;
  border-radius: 0 8px 8px 0;
  color: #555;
}

/* Content list (章一覧) */
.content-list {
  list-style: none;
  padding: 0;
  margin-top: 24px;
}

.content-list li {
  border-bottom: 1px solid #e8e4dc;
}

.content-list li a {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 14px 8px;
  transition: background 0.2s, padding-left 0.2s;
  border-radius: 6px;
}

.content-list li a:hover {
  background: #f0f7f2;
  padding-left: 16px;
}

.content-list-date {
  font-size: 12px;
  color: var(--text-light);
  white-space: nowrap;
}

.content-list-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--green-dark);
}

/* Nav buttons */
.content-nav {
  display: flex;
  gap: 12px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid #e0ddd6;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .site-nav { display: none; }
  .hamburger { display: flex; }
}

@media (max-width: 600px) {
  .comic-gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    padding: 12px;
  }

  .site-subtitle { display: none; }
  .site-title { font-size: 26px; }
}

@media (max-width: 360px) {
  .comic-gallery {
    grid-template-columns: 1fr;
  }
}