/* Reset & CSS Custom Variables */
:root {
  --bg-color: #f4f4f6;
  --text-color: #212529;
  --text-muted: #6c757d;
  --card-bg: #ffffff;
  --card-border: #e9ecef;
  --card-hover-border: #adb5bd;
  --accent-color: #2563eb;
  --accent-hover: #1d4ed8;
  --code-bg: #f8f9fa;
  --header-bg: rgba(244, 244, 246, 0.85);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --transition-speed: 0.3s;
}

[data-theme="dark"] {
  --bg-color: #0d1117;
  --text-color: #c9d1d9;
  --text-muted: #8b949e;
  --card-bg: #161b22;
  --card-border: #30363d;
  --card-hover-border: #6e7681;
  --accent-color: #58a6ff;
  --accent-hover: #79c0ff;
  --code-bg: #1f242c;
  --header-bg: rgba(13, 17, 23, 0.85);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(12px);
  background-color: var(--header-bg);
  transition: background-color var(--transition-speed) ease;
}

.nav-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-color);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-color);
}

.theme-toggle-btn {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-color);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  transform: scale(1.05);
}

/* Landing Hero Section */
.hero-section {
  min-height: calc(100vh - 70px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  text-align: center;
  position: relative;
}

.profile-avatar {
  width: 240px;
  height: 240px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease;
}

.profile-avatar:hover {
  transform: scale(1.02);
}

.hero-title {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  max-width: 650px;
  letter-spacing: -0.01em;
}

.title-word {
  color: var(--accent-color);
  display: inline-block;
  font-weight: 700;
  transition: opacity 0.32s cubic-bezier(0.4, 0, 0.2, 1), 
              transform 0.32s cubic-bezier(0.4, 0, 0.2, 1),
              filter 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

.title-word.fade-out {
  opacity: 0;
  transform: translateY(-8px);
  filter: blur(3px);
}

.title-word.fade-in-prepare {
  transition: none !important;
  opacity: 0;
  transform: translateY(8px);
  filter: blur(3px);
}

.social-icons {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 2.5rem 0;
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

.social-icons a {
  color: var(--text-muted);
  font-size: 1.5rem;
  transition: all 0.2s ease;
}

.social-icons a:hover {
  color: var(--accent-color);
  transform: translateY(-2px);
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.2s ease;
}

.scroll-indicator:hover {
  color: var(--accent-color);
}

.scroll-indicator i {
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-6px); }
  60% { transform: translateY(-3px); }
}

/* Main Container & Blog Section */
.content-wrapper {
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem 1.5rem;
}

.section-header {
  margin-bottom: 2.5rem;
  text-align: left;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
}

/* Blog Post List */
.posts-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.post-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1.75rem;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  overflow: hidden;
}

.post-card:hover {
  border-color: var(--card-hover-border);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.post-cover-thumb {
  width: 100%;
  max-height: 240px;
  overflow: hidden;
  border-radius: 8px;
  margin-bottom: 1.25rem;
}

.post-cover-thumb img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.post-card:hover .post-cover-thumb img {
  transform: scale(1.02);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.tag-pill {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-color);
  background-color: rgba(37, 99, 235, 0.08);
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
}

[data-theme="dark"] .tag-pill {
  background-color: rgba(88, 166, 255, 0.12);
}

.post-cover-image {
  width: 100%;
  max-height: 380px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 1.5rem;
  display: block;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.post-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 0.75rem;
  line-height: 1.35;
  transition: color 0.2s ease;
}

.post-card:hover .post-title {
  color: var(--accent-color);
}

.post-description {
  color: var(--text-muted);
  font-size: 0.98rem;
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.read-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-color);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
}

/* Expanded Post Container */
.post-expanded-view {
  display: none;
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.back-to-posts-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-color);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 2rem;
  transition: all 0.2s ease;
}

.back-to-posts-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* Markdown Formatted Body */
.markdown-body {
  line-height: 1.7;
  font-size: 1.05rem;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
  color: var(--text-color);
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.markdown-body p {
  margin-bottom: 1.25rem;
}

.markdown-body ul,
.markdown-body ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.markdown-body li {
  margin-bottom: 0.4rem;
}

.markdown-body blockquote {
  border-left: 4px solid var(--accent-color);
  padding-left: 1rem;
  margin: 1.5rem 0;
  color: var(--text-muted);
  font-style: italic;
}

.markdown-body code {
  background-color: var(--code-bg);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: 'JetBrains Mono', Consolas, Monaco, monospace;
  font-size: 0.9em;
}

.markdown-body pre {
  background-color: var(--code-bg);
  padding: 1.25rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--card-border);
}

.markdown-body pre code {
  background-color: transparent;
  padding: 0;
}

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
  width: 0%;
  z-index: 1001;
  transition: width 0.1s ease-out;
}

/* Search & Tag Filter Wrapper */
.search-filter-wrapper {
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.search-input-box {
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  pointer-events: none;
}

#search-input {
  width: 100%;
  padding: 0.85rem 2.75rem;
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  color: var(--text-color);
  font-size: 0.95rem;
  font-family: inherit;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

#search-input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

[data-theme="dark"] #search-input:focus {
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.2);
}

.clear-search-btn {
  position: absolute;
  right: 0.85rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.35rem 0.5rem;
  border-radius: 50%;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.clear-search-btn:hover {
  color: var(--text-color);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.tag-filter-pill {
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--text-muted);
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.tag-filter-pill:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.tag-filter-pill.active {
  background-color: var(--accent-color);
  color: #ffffff;
  border-color: var(--accent-color);
  font-weight: 600;
}

/* Post Navigation & Action Bar */
.post-nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.post-nav-bar .back-to-posts-btn {
  margin-bottom: 0;
}

.post-share-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.action-icon-btn {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

.action-icon-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  transform: translateY(-1px);
}

/* Table of Contents (ToC) */
.article-toc {
  background-color: var(--code-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
}

.toc-header {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;

  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.toc-item {
  font-size: 0.9rem;
}

.toc-item.level-3 {
  padding-left: 1.25rem;
  font-size: 0.85rem;
}

.toc-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.toc-link:hover {
  color: var(--accent-color);
  text-decoration: underline;
}

/* Code Snippet Wrapper & Copy Button */
.code-block-wrapper {
  position: relative;
  margin: 1.5rem 0;
}

.code-block-wrapper pre {
  margin: 0 !important;
}

.copy-code-btn {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  background-color: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #e6edf3;
  padding: 0.25rem 0.6rem;
  border-radius: 5px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.2s ease;
  z-index: 5;
}

.copy-code-btn:hover {
  background-color: rgba(255, 255, 255, 0.28);
  color: #ffffff;
}

.copy-code-btn.copied {
  background-color: #238636;
  border-color: #2ea043;
  color: #ffffff;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: var(--text-color);
  color: var(--bg-color);
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
  z-index: 2000;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* /now Dashboard Styles */
.now-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-color);
  background-color: rgba(37, 99, 235, 0.1);
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  margin-left: 0.5rem;
  vertical-align: middle;
}

[data-theme="dark"] .now-badge {
  background-color: rgba(88, 166, 255, 0.15);
}

.now-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.now-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.now-card:hover {
  border-color: var(--card-hover-border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.now-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--accent-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
}

[data-theme="dark"] .now-card-icon {
  background-color: rgba(88, 166, 255, 0.12);
}

.now-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 0.5rem;
}

.now-card-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.now-card-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.now-card-list li {
  font-size: 0.9rem;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.now-card-list li i {
  color: var(--accent-color);
  font-size: 0.85rem;
}

/* Map Section Styles */
.map-container-box {
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.expeditions-map {
  width: 100%;
  height: 520px;
  background-color: var(--card-bg);
  z-index: 1;
}

.map-popup-card {
  padding: 0.25rem 0;
}

.map-popup-title {
  font-size: 1rem;
  font-weight: 700;
  color: #111827;
  margin-bottom: 0.25rem;
}

.map-popup-meta {
  font-size: 0.8rem;
  color: #4b5563;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.map-popup-desc {
  font-size: 0.85rem;
  color: #374151;
  line-height: 1.4;
}

/* Custom Leaflet Dark Mode Popup Styling */
.leaflet-popup-content-wrapper {
  border-radius: 10px !important;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15) !important;
}

/* Footer */
.footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--card-border);
  margin-top: auto;
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .hero-title {
    font-size: 1.4rem;
  }
  .profile-avatar {
    width: 180px;
    height: 180px;
  }
  .post-expanded-view {
    padding: 1.5rem;
  }
  .post-nav-bar {
    flex-direction: column;
    align-items: flex-start;
  }
  .toast {
    left: 1rem;
    right: 1rem;
    text-align: center;
  }
  .expeditions-map {
    height: 380px;
  }
}