/* JadeRegent Theme - Portfolio Website */

:root {
  /* Background layers */
  --void: #080a08;
  --surface: #0b0d0b;
  --elevated: #0e100e;

  /* Border */
  --line: rgba(255, 255, 255, 0.12);
  --line-hover: rgba(255, 255, 255, 0.2);

  /* Jade green - core visual element */
  --jade: #1a2e1a;
  --jade-light: #243824;
  --jade-bright: #39ff14;

  /* Dark gold - accent */
  --accent: #a08c5b;

  /* Text layers */
  --text-primary: #f5f5f5;
  --text-secondary: #b8b8b8;
  --text-tertiary: #7a7a7a;
  --text-quaternary: #4a4a4a;

  /* Typography */
  --font-sans: "Avenir Next", "Avenir", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Palatino", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --font-mono: "Menlo", "SF Mono", "Fira Code", monospace;

  /* Spacing */
  --radius: 3px;
}

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

/* Base */
body {
  font-family: var(--font-sans);
  background: var(--void);
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

/* ==================== Layout ==================== */
.layout {
  display: flex;
  min-height: 100vh;
}

/* ==================== Navigator (3D Tilted Sidebar) ==================== */
.navigator {
  position: fixed;
  left: calc(32px + 10%);
  top: 50%;
  transform: translateY(-50%) perspective(800px) rotateY(8deg) scale(1.25);
  transform-origin: left center;
  width: 180px;

  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);

  padding: 28px 0;

  box-shadow:
    0 0 0 1px rgba(0,0,0,0.5),
    0 20px 50px -20px rgba(0,0,0,0.5),
    8px 0 24px -8px rgba(0,0,0,0.3);

  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
  z-index: 1000;
}

.nav-section {
  padding: 0 24px;
}

.nav-section + .nav-section {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.nav-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  margin: 0 -14px;

  color: var(--text-tertiary);
  text-decoration: none;
  font-size: 14px;
  border-radius: var(--radius);

  transition: all 0.15s ease;
}

.nav-link:hover {
  color: var(--text-secondary);
  background: rgba(255,255,255,0.03);
}

.nav-link.active {
  color: var(--text-primary);
}

.nav-icon {
  width: 20px;
  text-align: center;
  font-size: 15px;
  opacity: 0.5;
}

.nav-link:hover .nav-icon,
.nav-link.active .nav-icon {
  opacity: 0.8;
}

/* Language Switcher */
.nav-lang {
  display: flex;
  gap: 2px;
  flex-wrap: wrap;
  justify-content: center;
}

.lang-btn {
  padding: 6px 8px;
  background: transparent;
  border: none;
  color: var(--text-quaternary);
  font-size: 11px;
  font-family: var(--font-sans);
  cursor: pointer;
  border-radius: var(--radius);
  transition: all 0.15s;
  min-width: 24px;
  position: relative;
}

.lang-btn:hover {
  color: var(--text-tertiary);
}

.lang-btn.active {
  color: var(--text-secondary);
  background: rgba(255,255,255,0.04);
}

/* Language tooltip */
.lang-tooltip {
  position: absolute;
  left: 50%;
  bottom: -32px;
  transform: translateX(-50%);
  background: #1a1c1a;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 400;
  color: #ccc;
  white-space: nowrap;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s, visibility 0.15s;
  z-index: 10000;
  pointer-events: none;
}

.lang-btn:hover .lang-tooltip {
  opacity: 1;
  visibility: visible;
}

/* History Navigation */
.nav-history {
  display: flex;
  gap: 10px;
}

.history-btn {
  flex: 1;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text-quaternary);
  font-size: 14px;
  cursor: pointer;
  border-radius: var(--radius);
  transition: all 0.15s;
}

.history-btn:hover {
  color: var(--text-tertiary);
  border-color: var(--line-hover);
}

/* ==================== Main Content ==================== */
.main {
  margin-left: auto;
  margin-right: 10%;
  padding: 72px 64px;
  padding-top: 120px; /* Extra top padding to accommodate avatar overflow (-24px) */
  max-width: 900px;
  width: 100%;
}

/* ==================== About Section ==================== */
.about {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px;
  padding-left: 140px;
  padding-bottom: 48px;
  margin-bottom: 56px;
  margin-left: 40px;
  overflow: visible;
}

/* Jade underline - glows on hover */
.about::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--jade-light);
  transition: background 0.3s ease;
}

.about:hover::after {
  background: var(--jade-bright);
  animation: cosine-fade 8s ease-out forwards;
}

.about:has(.avatar:hover)::after {
  background: var(--jade-light);
  animation: none;
}

.about-inner {
  display: flex;
  gap: 32px;
}

/* Avatar - Thinking Outside the Box */
.avatar {
  position: absolute;
  left: -40px;
  top: -24px;
  width: 140px;
  height: 140px;
  background: var(--elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: 48px;
  font-weight: 300;
  flex-shrink: 0;
  box-shadow: 0 8px 32px -8px rgba(0,0,0,0.5);
  z-index: 1;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

/* Avatar jade underline */
.avatar::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--jade-light);
  transition: background 0.3s ease;
}

.avatar:hover::after {
  background: var(--jade-bright);
  animation: cosine-fade 8s ease-out forwards;
}

/* Cosine annealing: bright -> dim (but still visible) */
@keyframes cosine-fade {
  0% { background: var(--jade-bright); }
  100% { background: #2a5a2a; } /* 介于 jade-light 和 jade-bright 之间 */
}

.about-content {
  flex: 1;
  min-width: 0;
}

.label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-quaternary);
  margin-bottom: 8px;
}

.name {
  font-size: 26px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.tagline {
  font-size: 15px;
  color: var(--text-tertiary);
  margin-bottom: 20px;
}

.bio {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-family: var(--font-sans);
}

.bio a {
  color: var(--jade-bright);
  text-decoration: none;
  opacity: 0.6;
  transition: opacity 0.15s;
}

.bio a:hover {
  opacity: 1;
}

.links {
  display: flex;
  gap: 20px;
}

.links a {
  font-size: 14px;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color 0.15s, transform 0.15s;
}

.links a:hover {
  color: var(--text-primary);
}

.links .email-link {
  cursor: pointer;
  position: relative;
}

.links .email-link:active {
  transform: scale(0.95);
}

/* ==================== Search Section ==================== */
.search-section {
  margin-bottom: 48px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 14px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 15px;
  font-family: var(--font-sans);
  transition: border-color 0.15s;
}

.search-input::placeholder {
  color: var(--text-quaternary);
}

.search-input:focus {
  outline: none;
  border-color: var(--line-hover);
}

/* Tag dropdown autocomplete */
.tag-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  max-height: 240px;
  overflow-y: auto;
  z-index: 100;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.tag-suggestion {
  padding: 10px 16px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  font-size: 14px;
}

.tag-suggestion:hover {
  background: var(--surface);
  color: var(--text-primary);
}

.tag-suggestion.selected {
  background: var(--jade);
  color: var(--text-primary);
}

.tag-suggestion:first-child {
  border-radius: var(--radius) var(--radius) 0 0;
}

.tag-suggestion:last-child {
  border-radius: 0 0 var(--radius) var(--radius);
}

/* Tags */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tag {
  padding: 8px 14px;
  background: transparent;
  border: none;
  color: var(--text-quaternary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}

.tag:hover {
  color: var(--text-tertiary);
}

.tag.active {
  color: var(--text-secondary);
}

/* ==================== Posts Section ==================== */
.posts-header {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-quaternary);
  margin-bottom: 20px;
}

.posts-list {
  display: flex;
  flex-direction: column;
}

/* Post Card - breathing design, no box borders */
.post {
  display: block;
  text-decoration: none;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  transition: all 0.15s, border-bottom-color 0.3s ease;
}

.post:first-child {
  border-top: 1px solid var(--line);
}

.post:hover {
  background: linear-gradient(90deg, rgba(255,255,255,0.015), transparent 50%);
  padding-left: 20px;
  margin-left: -20px;
  padding-right: 20px;
  margin-right: -20px;
  border-bottom-color: var(--jade-bright);
  animation: cosine-fade-border 8s ease-out forwards;
}

@keyframes cosine-fade-border {
  0% { border-bottom-color: var(--jade-bright); }
  100% { border-bottom-color: #2a5a2a; }
}

.post-title {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
  transition: color 0.15s;
}

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

.post-meta {
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--text-quaternary);
  margin-bottom: 10px;
}

.post-meta.status-ongoing {
  color: var(--jade-bright);
  opacity: 0.6;
}

.post-summary {
  font-size: 15px;
  color: var(--text-tertiary);
  line-height: 1.65;
  font-family: var(--font-sans);
}

.post-tags {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.post-tag {
  font-size: 12px;
  color: var(--text-quaternary);
}

/* ==================== Blog Link ==================== */
.blog-link-section {
  margin-top: 56px;
}

.blog-link-text {
  font-size: 14px;
  color: var(--text-tertiary);
  font-family: var(--font-sans);
}

.blog-link-text a {
  color: var(--jade-bright);
  text-decoration: none;
  opacity: 0.6;
  transition: opacity 0.15s;
}

.blog-link-text a:hover {
  opacity: 1;
}

/* ==================== Blog Page Disclaimer ==================== */
.blog-disclaimer {
  font-size: 15px;
  color: var(--text-tertiary);
  font-style: italic;
  margin-bottom: 40px;
  line-height: 1.65;
  font-family: var(--font-sans);
}

/* ==================== Footer ==================== */
.footer {
  margin-top: 56px;
  padding-top: 28px;
  font-size: 13px;
  color: var(--text-quaternary);
}

/* ==================== Empty State ==================== */
.empty-state {
  text-align: center;
  padding: 48px;
  color: var(--text-tertiary);
}

/* ==================== Post Page ==================== */
.post-page {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 48px;
}

/* Top decorative line */
.post-page::before {
  content: '';
  position: absolute;
  top: 0;
  left: 48px;
  right: 48px;
  height: 1px;
  background: linear-gradient(90deg,
    var(--accent),
    var(--jade-light) 50%,
    transparent
  );
}

.post-page-header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 32px;
  margin-bottom: 32px;
}

.post-page-title {
  font-size: 28px;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.post-page-meta {
  font-size: 14px;
  color: var(--text-quaternary);
  font-family: var(--font-mono);
  margin-bottom: 12px;
}

.post-page-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Post page language switcher */
.post-lang-switcher {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.lang-link {
  color: var(--text-quaternary);
  text-decoration: none;
  font-size: 13px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all 0.15s;
}

.lang-link:hover {
  border-color: var(--line-hover);
  color: var(--text-tertiary);
}

.lang-link.active {
  border-color: var(--accent);
  color: var(--accent);
}

/* ==================== Post Content ==================== */
.post-content {
  color: var(--text-secondary);
  font-family: var(--font-sans);
}

.post-content h1 {
  font-size: 24px;
  font-weight: 500;
  color: var(--text-primary);
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.post-content h2 {
  font-size: 20px;
  font-weight: 500;
  color: var(--text-primary);
  margin: 36px 0 16px;
}

.post-content h3 {
  font-size: 17px;
  font-weight: 500;
  color: var(--text-secondary);
  margin: 28px 0 12px;
}

.post-content p {
  margin-bottom: 16px;
}

.post-content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}

.post-content a:hover {
  border-bottom-color: var(--accent);
}

.post-content ul,
.post-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

.post-content li {
  margin-bottom: 6px;
}

.post-content blockquote {
  position: relative;
  border-left: 2px solid var(--accent);
  padding-left: 20px;
  margin: 24px 0;
  color: var(--text-tertiary);
  font-style: italic;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background-color: var(--elevated);
  padding: 2px 6px;
  border-radius: 2px;
  color: #69db7c;
}

.post-content pre {
  background-color: var(--void);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  margin: 20px 0;
  overflow-x: auto;
}

.post-content pre code {
  background: none;
  padding: 0;
  color: var(--text-secondary);
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 768px) {
  .post-content table {
    font-size: 13px;
  }

  .post-content th,
  .post-content td {
    padding: 10px 12px;
  }
}

.post-content th,
.post-content td {
  border: 1px solid var(--line);
  padding: 12px 16px;
  text-align: left;
}

.post-content th {
  background-color: var(--elevated);
  color: var(--text-tertiary);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.05em;
}

.post-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.post-content img {
  max-width: 100%;
  border-radius: var(--radius);
}

/* ==================== Mobile Menu Toggle ==================== */
.menu-toggle {
  display: none;
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 1001;
  width: 44px;
  height: 44px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.menu-icon {
  width: 18px;
  height: 2px;
  background: var(--text-secondary);
  position: relative;
  transition: all 0.3s;
  display: block;
}

.menu-icon::before,
.menu-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--text-secondary);
  transition: all 0.3s;
}

.menu-icon::before {
  top: -6px;
}

.menu-icon::after {
  top: 6px;
}

/* Menu open state */
.menu-toggle.active .menu-icon {
  background: transparent;
}

.menu-toggle.active .menu-icon::before {
  transform: rotate(45deg);
  top: 0;
}

.menu-toggle.active .menu-icon::after {
  transform: rotate(-45deg);
  top: 0;
}

/* Overlay */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s;
}

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

/* ==================== Responsive ==================== */

/* Breakpoint: Reduce navigator size and increase content margin */
@media (max-width: 1200px) {
  .navigator {
    left: 24px;
    transform: translateY(-50%) perspective(800px) rotateY(6deg) scale(1.05);
    width: 160px;
  }

  .main {
    margin-left: 220px;
    margin-right: 5%;
    padding: 56px 48px;
  }

  .about {
    padding-left: 0;
  }

  .avatar {
    width: 110px;
    height: 110px;
    left: -20px;
  }
}

/* Breakpoint: Further reduce for medium tablets */
@media (max-width: 1100px) {
  .navigator {
    left: 16px;
    transform: translateY(-50%) perspective(600px) rotateY(4deg) scale(0.95);
    width: 150px;
  }

  .main {
    margin-left: 190px;
    padding: 48px 40px;
  }

  .avatar {
    width: 100px;
    height: 100px;
    left: -16px;
  }
}

@media (max-width: 1000px) {
  /* Show mobile menu toggle */
  .menu-toggle {
    display: flex;
  }

  /* Hide navigator by default */
  .navigator {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    width: 240px;
    border-radius: 0;
    padding: 80px 0 28px;
  }

  .navigator.active {
    transform: translateX(0);
  }

  /* Show overlay when navigator is open */
  .nav-overlay {
    display: block;
    pointer-events: none;
  }

  .nav-overlay.active {
    pointer-events: auto;
  }

  /* Full width content */
  .main {
    margin-left: 0;
    margin-right: 0;
    padding: 80px 32px 48px;
    max-width: 100%;
  }

  .about {
    margin-left: 0;
    padding-left: 20px;
    padding-right: 140px;
  }

  .avatar {
    width: 100px;
    height: 100px;
    left: auto;
    right: 20px;
    top: -16px;
    font-size: 36px;
  }
}

@media (max-width: 600px) {
  .main {
    padding: 72px 20px 40px;
  }

  .about {
    padding: 32px 20px 40px;
    padding-top: 80px;
    padding-right: 20px;
  }

  .avatar {
    position: relative;
    left: auto;
    right: auto;
    top: auto;
    margin: -60px auto 20px;
    width: 80px;
    height: 80px;
    font-size: 28px;
  }

  .about-content {
    text-align: center;
  }

  .name {
    font-size: 22px;
  }

  .links {
    justify-content: center;
    flex-wrap: wrap;
  }

  .post-page {
    padding: 32px 20px;
  }

  .post-page-title {
    font-size: 22px;
  }
}

/* Chart styles */
.chart-group {
  margin: 1.5rem 0;
}

.charts-container {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  padding-top: 3rem;
}

.chart-scale-toggle {
  position: absolute !important;
  top: 12px !important;
  right: 12px !important;
  z-index: 10 !important;

  display: flex !important;
  gap: 2px !important;

  background: var(--surface) !important;
  border: 1px solid var(--line) !important;
  border-radius: var(--radius) !important;
  padding: 4px !important;
  margin: 0 !important;

  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3) !important;
}

.chart-scale-toggle .toggle-option {
  padding: 6px 12px !important;
  font-size: 12px !important;
  font-family: var(--font-mono) !important;
  color: var(--text-quaternary) !important;
  cursor: pointer !important;
  transition: all 0.15s !important;
  user-select: none !important;
  background: transparent !important;
  border: none !important;
  border-radius: 2px !important;
  margin: 0 !important;
  text-decoration: none !important;
}

.chart-scale-toggle .toggle-option:hover {
  color: var(--text-tertiary) !important;
  background: rgba(255, 255, 255, 0.03) !important;
}

.chart-scale-toggle .toggle-option.active {
  color: var(--text-primary) !important;
  background: rgba(255, 255, 255, 0.08) !important;
}

.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.chart-wrapper {
  min-height: 200px;
}

.chart-error {
  color: #ff6b6b;
  font-style: italic;
  text-align: center;
  padding: 2rem;
}

/* Reference citation button */
.ref-cite {
  display: inline-block;
  color: var(--accent);
  background: rgba(160, 140, 91, 0.1);
  border: 1px solid rgba(160, 140, 91, 0.3);
  border-radius: 3px;
  padding: 1px 6px;
  font-size: 0.85em;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  vertical-align: baseline;
}

.ref-cite:hover {
  color: var(--text-primary);
  background: rgba(160, 140, 91, 0.2);
  border-color: var(--accent);
}

/* Reference tooltip (real DOM element) */
.ref-tooltip {
  position: fixed;
  z-index: 10000;
  background: var(--elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-secondary);
  max-width: 400px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s, visibility 0.15s;
}

.ref-tooltip.visible {
  opacity: 1;
  visibility: visible;
}