/* Google Fonts - Noto Sans TC */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;700&display=swap');

:root {
  --primary-color: #E87400;
  --secondary-color: #4CAF50;
  --accent-color: #FF6B35;
  --background-color: #FAF8F2;
  --text-color: #333;
  --light-gray: #f4f4f4;
  --white: #fff;
  --hover-shadow: 0 8px 24px rgba(0,0,0,0.12);
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans TC', sans-serif;
  font-size: 12px;
  line-height: 1.7;
  margin: 0;
  padding: 0;
  background: linear-gradient(135deg, var(--background-color) 0%, #F5F2E8 100%);
  color: var(--text-color);
  font-weight: 400;
}

.container {
  max-width: 1000px;
  margin: 2rem auto;
  padding: 2rem;
  background: var(--white);
  border-radius: var(--border-radius);
  position: relative;
  overflow: hidden;
}

.container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
   background: var(--primary-color);;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-color);
  font-weight: 700;
  margin-bottom: 0.5em;
}

h1 {
  font-size: 3em;
  text-align: center;
  color: var(--primary-color);
  margin-bottom: 1rem;
  letter-spacing: 3px;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
  position: relative;
}

h1::after {
  content: '';
  display: block;
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  margin: 1rem auto;
  border-radius: 2px;
}

h2 {
  font-size: 2.2em;
  color: var(--primary-color);
  border-bottom: 3px solid var(--primary-color);
  padding-bottom: 0.5em;
  margin: 3rem 0 1.5rem 0;
  display: flex;
  align-items: center;
  scroll-margin-top: 20px;
  position: relative;
}

h2::before {
  content: '';
  position: absolute;
  left: -1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 40px;
  background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
  border-radius: 3px;
}

h3 {
  font-size: 1.6em;
  color: var(--text-color);
  border-left: 5px solid var(--secondary-color);
  padding-left: 1rem;
  margin: 2.5rem 0 1.2rem 0;
  scroll-margin-top: 20px;
  background: linear-gradient(90deg, rgba(76,175,80,0.05) 0%, transparent 100%);
  padding: 0.5rem 1rem;
  border-radius: 0 8px 8px 0;
}

h4 {
  font-size: 1.3em;
  margin-top: 2rem;
  font-weight: 600;
  color: var(--accent-color);
}

/* Alert boxes */
.custom-block, .warning-box {
  padding: 1.5rem;
  margin: 2rem 0;
  border-radius: var(--border-radius);
  font-size: 1em;
  line-height: 1.7;
  position: relative;
  overflow: hidden;
}

.custom-block { 
  background: linear-gradient(135deg, #F0FFF0 0%, #E8F5E8 100%);
  color: #2E8B57;
  border-left: 5px solid var(--secondary-color);
}

.warning-box { 
  background: linear-gradient(135deg, #FFF8E1 0%, #FFF3C4 100%);
  color: #F57C00;
  border: 1px solid #FFECB3;
  display: flex;
  align-items: center;
}

.warning-box .icon { 
  font-size: 1.5em;
  margin-right: 0.7em;
}

/* Restaurant list styling */
ul { 
  list-style-type: none;
  padding-left: 0;
  margin: 1.5rem 0;
}

ul > li {
    background-color: var(--white);
    border: 1px solid var(--light-gray);
    border-radius: 8px;
    padding: 1em 1.5em;
    margin-bottom: 1em;
    box-shadow: none;
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

ul > li:hover {
  transform: translateY(-3px);
  border-color: var(--primary-color);
}

ul > li:hover::before {
  transform: scaleY(1);
}

ul li a {
  color: var(--text-color);
  text-decoration: none;
  font-size: 1.1em;
  font-weight: 600;
  transition: var(--transition);
  display: inline-block;
}

ul li a:hover {
  color: var(--primary-color);
  transform: translateX(8px);
}

blockquote {
  margin: 0.8rem 0 0 0;
  padding: 1rem;
  border-left: 4px solid var(--light-gray);
  background: linear-gradient(90deg, #f9f9f9 0%, transparent 100%);
  color: #666;
  border-radius: 0 8px 8px 0;
  font-size: 0.95em;
  font-style: normal;
}

/* Sidebar styles */
#toc-sidebar {
  position: fixed;
  left: -320px; 
  top: 50%;
  transform: translateY(-50%);
  width: 280px;
  max-height: 90vh;
  overflow-y: auto;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 1em;
  border-radius: 12px;
  z-index: 1000;
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.2);
  opacity: 0;
  visibility: hidden;
}

#toc-sidebar.open {
  left: 0;
}

#toc-sidebar h4 {
  margin-top: 0;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  font-size: 1.4em;
  text-align: center;
  color: var(--primary-color);
  border-bottom: 2px solid var(--primary-color);
  position: relative;
}

#toc-sidebar h4::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 2px;
  background: var(--accent-color);
}

#toc-sidebar h4 a {
  color: inherit;
  text-decoration: none;
  display: block;
  transition: var(--transition);
}

#toc-sidebar h4 a:hover {
  opacity: 0.8;
  transform: scale(1.02);
}

#toc-sidebar ul { 
  padding-left: 0;
  margin: 0;
}

#toc-sidebar ul.main-menu > li > a {
  display: block;
  padding: 0.8rem 1rem;
  color: #333;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  margin-bottom: 0.3rem;
}

#toc-sidebar a.has-submenu::after {
  content: '▸';
  position: absolute;
  right: 15px;
  transition: var(--transition);
  font-size: 0.9em;
}

#toc-sidebar li.open > a.has-submenu::after {
  transform: rotate(90deg);
}

#toc-sidebar ul li a:hover,
#toc-sidebar ul li a.active {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: var(--white);
  transform: translateX(8px);
}

#toc-sidebar ul li a.active {
  font-weight: 700;
}

.submenu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  background: linear-gradient(135deg, rgba(0,0,0,0.03) 0%, transparent 100%);
  border-radius: 8px;
  margin: 4px 0 8px 0;
}

li.open > .submenu {
  max-height: 1000px;
}

.submenu li a {
  padding: 0.6rem 1rem 0.6rem 2rem;
  display: block;
  font-size: 0.9em;
  font-weight: 400;
  color: #555;
  border-radius: 6px;
  transition: var(--transition);
  margin-bottom: 0.2rem;
}

.submenu li a:hover, 
.submenu li a.active {
  background: linear-gradient(135deg, var(--secondary-color), #66BB6A);
  color: var(--white);
  transform: translateX(5px);
}


/* Mobile menu */
#mobile-menu-toggle {
    /* --- 修改 --- */
    /* 讓漢堡按鈕在所有尺寸下都顯示 */
    display: block; 
    position: fixed;
    bottom: 20px;
    left: 20px;
    width: 55px;
    height: 55px;
    background-color: var(--primary-color);
    border: none;
    border-radius: 50%;
    z-index: 9999; 
    cursor: pointer;
}

#mobile-menu-toggle span {
  display: block;
  position: absolute;
  height: 3px;
  width: 50%;
  background: white;
  border-radius: 3px;
  left: 25%;
  transition: var(--transition);
}

#mobile-menu-toggle span:nth-child(1) { top: 30%; }
#mobile-menu-toggle span:nth-child(2) { top: 48%; }
#mobile-menu-toggle span:nth-child(3) { top: 66%; }

#toc-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(4px);
}

.mobile-menu-open #toc-overlay {
  display: block;
  opacity: 1;
}

/* --- 將原本在 @media 中的邏輯移到外面，讓所有尺寸通用 --- */
.mobile-menu-open #toc-sidebar {
  left: 0;
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}

.mobile-menu-open #mobile-menu-toggle span:nth-child(1) {
  top: 48%;
  transform: rotate(135deg);
}
.mobile-menu-open #mobile-menu-toggle span:nth-child(2) {
  opacity: 0;
  left: -50%;
}
.mobile-menu-open #mobile-menu-toggle span:nth-child(3) {
  top: 48%;
  transform: rotate(-135deg);
}


/* Responsive design */
@media (max-width: 1400px) {
  /* 此處現在是空的，因為主要邏輯已經移到外面了。 */
  /* 您可以保留這個空區塊，未來若有平板專屬樣式可以寫在這裡。 */
}