/* #004480 主視覺顏色主題 */
:root {
  --md-primary-fg-color: #004480;
  --md-primary-fg-color--light: #0056a0;
  --md-primary-fg-color--dark: #003366;
  --md-accent-fg-color: #0066cc;
}

/* 背景色調整 - 淺色模式 */
[data-md-color-scheme="default"] body {
  background-color: #e8f2ff;
  background-image: linear-gradient(135deg, #e8f2ff 0%, #d1e7ff 100%);
}

[data-md-color-scheme="default"] .md-main__inner {
  background-color: transparent;
  margin-bottom: 1rem;
}

/* 背景色調整 - 深色模式 */
[data-md-color-scheme="slate"] body {
  background-color: #0a1121;
  background-image: linear-gradient(135deg, #0a1121 0%, #1a2332 100%);
}

[data-md-color-scheme="slate"] .md-main__inner {
  background-color: transparent;
  margin-bottom: 1rem;
}

/* 深色模式字體顏色調整 */
[data-md-color-scheme="slate"] .md-content {
  color: #d1d5db;
}

[data-md-color-scheme="slate"] .md-content h1,
[data-md-color-scheme="slate"] .md-content h2,
[data-md-color-scheme="slate"] .md-content h3,
[data-md-color-scheme="slate"] .md-content h4,
[data-md-color-scheme="slate"] .md-content h5,
[data-md-color-scheme="slate"] .md-content h6 {
  color: #e5e7eb;
}

[data-md-color-scheme="slate"] .md-content p,
[data-md-color-scheme="slate"] .md-content li,
[data-md-color-scheme="slate"] .md-content td {
  color: #c9cdd4;
}

[data-md-color-scheme="slate"] .md-content a {
  color: #60a5fa;
}

[data-md-color-scheme="slate"] .md-content a:hover {
  color: #93c5fd;
}

.md-content {
  background-color: transparent;
  /* 預留底部空間，避免被右下角章節導航按鈕遮擋 */
  padding-bottom: 80px;
}

/* 5G 相關的現代化樣式 */
.md-header {
  background: linear-gradient(135deg, #004480 0%, #0056a0 100%);
}

/* 自定義 Logo */
.md-header__button.md-logo {
  padding: 0;
  margin: 0.4rem;
}

.md-header__button.md-logo img {
  height: 2rem;
  width: auto;
}

.md-tabs {
  background: linear-gradient(135deg, #004480 0%, #0056a0 100%);
}

/* 自定義按鈕樣式 */
.md-button {
  background: linear-gradient(135deg, #0056a0 0%, #004480 100%);
  border: none;
  transition: all 0.3s ease;
}

.md-button:hover {
  background: linear-gradient(135deg, #004480 0%, #003366 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 68, 128, 0.3);
}

/* 5G 網路相關的圖示樣式 */
.md-nav__icon {
  filter: drop-shadow(0 2px 4px rgba(0, 68, 128, 0.2));
}

/* 圖片圓角效果 - 淺色模式 */
[data-md-color-scheme="default"] .md-content img {
  border-radius: 12px;
  box-shadow: 0 4px 8px rgba(0, 68, 128, 0.12);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(0, 68, 128, 0.08);
}

[data-md-color-scheme="default"] .md-content img:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 68, 128, 0.25);
  border-color: rgba(0, 68, 128, 0.15);
}

/* 圖片圓角效果 - 深色模式 */
[data-md-color-scheme="slate"] .md-content img {
  border-radius: 12px;
  box-shadow: 0 4px 8px rgba(0, 68, 128, 0.4);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(0, 68, 128, 0.2);
}

[data-md-color-scheme="slate"] .md-content img:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 68, 128, 0.6);
  border-color: rgba(0, 68, 128, 0.4);
}

/* Footer 樣式調整 - 淺色模式 */
[data-md-color-scheme="default"] .md-footer {
  background-color: #004480;
  color: #ffffff;
  border-top: 1px solid rgba(0, 68, 128, 0.15);
}

[data-md-color-scheme="default"] .md-footer-meta {
  background-color: #003366;
}

/* Footer 樣式調整 - 深色模式 */
[data-md-color-scheme="slate"] .md-footer {
  background-color: #004480;
  color: #ffffff;
  border-top: 1px solid rgba(0, 68, 128, 0.3);
}

[data-md-color-scheme="slate"] .md-footer-meta {
  background-color: #003366;
}

.md-footer__inner {
  padding: 1.5rem 0;
}

.md-footer__link {
  color: #ffffff;
  opacity: 0.8;
  transition: opacity 0.3s ease;
}

.md-footer__link:hover {
  opacity: 1;
}

/* 響應式設計 */
@media screen and (max-width: 768px) {
  .md-header__title {
    font-size: 1.2rem;
  }
}

/* 頁腳導覽按鈕 - 默認隱藏（加強優先級） */
.md-footer .md-footer__inner {
  display: none !important;
}

/* 只在 5G Core Book 下顯示頁腳導覽 */
body.show-footer-nav .md-footer .md-footer__inner {
  display: block !important;
}

/* 章節導航 - 右下角固定按鈕 */
.chapter-nav {
  position: fixed;
  right: 2rem;
  bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 50;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.chapter-nav.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: white;
  color: #004480 !important;
  text-decoration: none !important;
  border-radius: 50%;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
  transition: all 0.2s ease;
  font-size: 1.2rem;
}

.nav-btn:hover {
  background: #004480;
  color: white !important;
  box-shadow: 0 4px 20px rgba(0, 68, 128, 0.3);
  transform: scale(1.05);
}

[data-md-color-scheme="slate"] .nav-btn {
  background: #1e293b;
  color: #60a5fa !important;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

[data-md-color-scheme="slate"] .nav-btn:hover {
  background: #004480;
  color: white !important;
}

/* Tooltip 彈窗 - 加強動畫效果 */
.nav-btn::before {
  content: attr(title);
  position: absolute;
  right: calc(100% + 1rem);
  top: 50%;
  transform: translateY(-50%) translateX(20px) scale(0.9);
  background: #1f2937;
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.nav-btn::after {
  content: "";
  position: absolute;
  right: calc(100% + 0.5rem);
  top: 50%;
  transform: translateY(-50%) translateX(10px);
  border: 6px solid transparent;
  border-left-color: #1f2937;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.nav-btn:hover::before {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0) scale(1);
}

.nav-btn:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

[data-md-color-scheme="slate"] .nav-btn::before {
  background: #374151;
}

[data-md-color-scheme="slate"] .nav-btn::after {
  border-left-color: #374151;
}

/* 按鈕內的箭頭 */
.nav-btn .arrow {
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-prev .arrow::before {
  content: "↑";
}

.nav-next .arrow::before {
  content: "→";
}

/* 手機版調整 */
@media screen and (max-width: 768px) {
  .chapter-nav {
    right: 1rem;
    bottom: 1rem;
  }
  
  .nav-btn {
    width: 44px;
    height: 44px;
  }
  
  /* 手機版隱藏 tooltip，避免版面問題 */
  .nav-btn::before,
  .nav-btn::after {
    display: none;
  }
}

/* 作者介紹樣式 */
.author-intro {
  margin: 2rem 0;
  padding: 2rem;
  background: linear-gradient(135deg, rgba(0, 68, 128, 0.03) 0%, rgba(0, 86, 160, 0.03) 100%);
  border-radius: 16px;
  border: 1px solid rgba(0, 68, 128, 0.1);
  box-shadow: 0 4px 16px rgba(0, 68, 128, 0.08);
}

[data-md-color-scheme="slate"] .author-intro {
  background: linear-gradient(135deg, rgba(0, 68, 128, 0.15) 0%, rgba(0, 86, 160, 0.1) 100%);
  border-color: rgba(0, 68, 128, 0.2);
}

/* 頭像和基本資訊區域 */
.author-intro > div:first-of-type {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 1.5rem;
}

.author-intro img {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 4px solid #004480;
  box-shadow: 0 8px 24px rgba(0, 68, 128, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.author-intro img:hover {
  transform: scale(1.05);
  box-shadow: 0 12px 32px rgba(0, 68, 128, 0.3);
}

.author-info {
  flex: 1;
}

.author-info h2 {
  margin: 0 0 1rem;
  font-size: 1.8rem;
  color: #004480;
  font-weight: 700;
}

[data-md-color-scheme="slate"] .author-info h2 {
  color: #60a5fa;
}

/* 經歷列表 */
.author-info .exp {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.author-info .exp p {
  margin: 0;
  padding: 0.5rem 1rem;
  background: white;
  border-radius: 8px;
  color: #374151;
  font-size: 0.9rem;
  font-weight: 500;
  border-left: 3px solid #004480;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  white-space: nowrap;
  flex-shrink: 0;
}

[data-md-color-scheme="slate"] .author-info .exp p {
  background: rgba(30, 41, 59, 0.6);
  color: #e2e8f0;
}

/* 描述區域 */
.description {
  padding-top: 1.5rem;
  border-top: 2px solid rgba(0, 68, 128, 0.1);
}

[data-md-color-scheme="slate"] .description {
  border-top-color: rgba(0, 68, 128, 0.2);
}

.description p {
  margin: 0.75rem 0;
  color: #4b5563;
  font-size: 1rem;
  line-height: 1.7;
}

[data-md-color-scheme="slate"] .description p {
  color: #d1d5db;
}

/* 手機版響應式 */
@media screen and (max-width: 768px) {
  .author-intro {
    padding: 1.5rem;
  }
  
  .author-intro > div:first-of-type {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
  }
  
  .author-intro img {
    width: 120px;
    height: 120px;
  }
  
  .author-info .exp {
    justify-content: center;
  }
}