/* Theme system: default dark, optional light */
:root {
  --bg: #0f1115;
  --panel: #151a22;
  --panel-2: #1b2230;
  --text: #e6e6e6;
  --muted: #a0a7b4;
  --primary: #4da3ff;
  --border: #2a2f3a;
}

/* Light theme variables */
.theme-light {
  --bg: #f0f6ff; /* keep a soft light background */
  --panel: #ffffff;
  --panel-2: #f9f9fb;
  --text: #222;
  --muted: #666;
  --primary: #007ced; /* matches original accent */
  --border: #e5e5e5;
}

/* Dark theme base */
.theme-dark body,
.theme-dark html {
  background-color: var(--bg) !important;
}
.theme-dark .lm-animated-bg { opacity: 0.12; }

/* Panels and containers */
.theme-dark .page-container,
.theme-dark .page-title,
.theme-dark .site-footer,
.theme-dark .header,
.theme-dark .header.fixed,
.theme-dark .header .header-content,
.theme-dark .blog-sidebar,
.theme-dark .lm-info-block,
.theme-dark .testimonial-content,
.theme-dark .project-description,
.theme-dark .certificate-item,
.theme-dark .blog-card .post-info,
.theme-dark .blog-card .post-without-f-image {
  background-color: var(--panel) !important;
  color: var(--text) !important;
  border-color: var(--border) !important;
}

/* Text colors */
.theme-dark body,
.theme-dark p,
.theme-dark .ci-text p,
.theme-dark .timeline-item p,
.theme-dark .service-details p,
.theme-dark .entry-content,
.theme-dark .page-content {
  color: var(--text) !important;
}
.theme-dark h1,
.theme-dark h2,
.theme-dark h3,
.theme-dark h4,
.theme-dark h5,
.theme-dark h6,
.theme-dark .block-title h2,
.theme-dark .home-text h1 {
  color: var(--text) !important;
}

/* Links */
.theme-dark a { color: var(--primary) !important; }
.theme-dark a:hover { color: #79b8ff !important; }

/* Borders and separators */
.theme-dark .border-top,
.theme-dark .border-bottom,
.theme-dark .timeline-item:before,
.theme-dark .timeline-item:after,
.theme-dark .page-title {
  border-color: var(--border) !important;
}

/* Remove footer top border */
.theme-dark .site-footer,
.theme-light .site-footer {
  border-top: none !important;
}

/* Ranking Grid */
.ranking-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.ranking-item {
  background: linear-gradient(135deg, var(--panel) 0%, var(--panel-2) 100%);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 12px;
  text-align: center;
  transition: all 0.3s ease;
}

.ranking-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(77, 163, 255, 0.15);
  border-color: var(--primary);
}

.ranking-rank {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  line-height: 1.2;
}

.ranking-category {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
  font-weight: 500;
}

.ranking-item:hover .ranking-category {
  color: var(--text);
}

@media (max-width: 768px) {
  .ranking-grid {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 12px;
  }
  
  .ranking-item {
    padding: 12px 10px;
  }
  
  .ranking-rank {
    font-size: 16px;
  }
  
  .ranking-category {
    font-size: 11px;
  }
}

/* Skill Cards */
.skill-card {
  background: linear-gradient(135deg, var(--panel) 0%, var(--panel-2) 100%);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 24px;
  margin-bottom: 24px;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(77, 163, 255, 0.15);
  border-color: var(--primary);
}

.skill-card-icon {
  font-size: 48px;
  color: var(--primary);
  margin-bottom: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 60px;
}

.skill-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 20px 0;
  line-height: 1.4;
  letter-spacing: 0.5px;
}

.skill-card-list {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.skill-card-list li {
  font-size: 14px;
  color: var(--muted);
  padding: 8px 0;
  position: relative;
  padding-left: 20px;
  line-height: 1.6;
  transition: color 0.3s ease;
}

.skill-card-list li:before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
}

.skill-card:hover .skill-card-list li {
  color: var(--text);
}

@media (max-width: 768px) {
  .skill-card {
    padding: 24px 18px;
  }
  
  .skill-card-icon {
    font-size: 40px;
    height: 50px;
  }
  
  .skill-card-title {
    font-size: 15px;
    margin-bottom: 16px;
  }
  
  .skill-card-list li {
    font-size: 13px;
    padding: 6px 0;
  }
}

/* Nav */
.theme-dark .site-nav,
.theme-dark .header-content {
  background-color: var(--panel) !important;
}
.theme-dark .site-main-menu li a {
  color: var(--text) !important;
  opacity: 0.85;
}
.theme-dark .site-main-menu li.current-menu-item > a,
.theme-dark .site-main-menu li:hover > a {
  opacity: 1;
}

/* Buttons */
.theme-dark .btn-primary,
.theme-dark .btn-secondary,
.theme-dark button,
.theme-dark input[type="button"],
.theme-dark input[type="submit"] {
  background-color: var(--panel-2) !important;
  border-color: var(--primary) !important;
  color: var(--text) !important;
}
.theme-dark .btn-primary:hover,
.theme-dark .btn-secondary:hover,
.theme-dark button:hover,
.theme-dark input[type="button"]:hover,
.theme-dark input[type="submit"]:hover {
  background-color: var(--primary) !important;
  color: #0b1220 !important;
}

/* Light theme buttons: ensure label visibility */
.theme-light .btn-primary,
.theme-light .btn-secondary,
.theme-light button,
.theme-light input[type="button"],
.theme-light input[type="submit"] {
  background-color: var(--panel) !important;
  border-color: var(--primary) !important;
  color: var(--primary) !important;
}
.theme-light .btn-primary:hover,
.theme-light .btn-secondary:hover,
.theme-light button:hover,
.theme-light input[type="button"]:hover,
.theme-light input[type="submit"]:hover {
  background-color: var(--primary) !important;
  color: #fff !important;
}

/* Widgets, blocks */
.theme-dark .lm-info-block,
.theme-dark .info-block-w-icon .ci-text {
  color: var(--text) !important;
}
.theme-dark .info-block-w-icon i { color: var(--primary) !important; }

/* Timeline chips */
.theme-dark .timeline-item {
  position: relative;
}
.theme-dark .timeline-item:before,
.theme-dark .timeline-item:after {
  background-color: var(--border) !important;
  z-index: 0;
}
.theme-dark .timeline-item h5.item-period {
  border-color: var(--primary) !important;
  color: var(--text) !important;
  background-color: var(--panel) !important; /* ensure chip sits over the line */
  position: relative;
  z-index: 1;
}

/* Research interests grid */
.ri-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 10px;
  margin-bottom: 40px;
}
.ri-card {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
  color: var(--text);
  font-weight: 600;
  text-align: center;
}

/* Section spacing helper */
.section-gap {
  margin-bottom: 36px;
}
@media (max-width: 991px) {
  .section-gap {
    margin-bottom: 44px;
  }
}

/* Override page-title negative margins to align with rest of page */
.theme-dark .page-title,
.theme-light .page-title {
  margin-left: 0 !important;
  margin-right: 0 !important;
  padding: 40px 32px 36px !important;
  width: 100% !important;
}

/* Ensure full-width for nested containers */
.page-title > div,
.page-title > div > div,
.page-title > div > div > div {
  width: 100% !important;
  max-width: 100% !important;
}

.content-area .row {
  width: 100% !important;
  margin-left: 0 !important;
  margin-right: 0 !important;
}

/* Column stacking gap on mobile/tablet */
.mobile-gap {
  margin-top: 0;
}
@media (max-width: 991px) {
  .mobile-gap {
    margin-top: 36px;
  }
}

/* Teaching assistant cards */
.ta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 10px;
}
.ta-card {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 6px 14px -10px rgba(0,0,0,0.4);
}
.ta-role {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--primary);
}
.ta-course {
  font-size: 15px;
  font-weight: 700;
  margin-top: 4px;
  margin-bottom: 2px;
}
.ta-prof {
  font-size: 13px;
  color: var(--muted);
}
.ta-term {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
}

/* Academic service cards */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 10px;
}
.service-card {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 6px 14px -10px rgba(0,0,0,0.4);
}
.service-role {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--primary);
}
.service-event {
  font-size: 15px;
  font-weight: 700;
  margin-top: 4px;
  margin-bottom: 2px;
}
.service-meta {
  font-size: 13px;
  color: var(--muted);
}

/* Management skills tags */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin-top: 14px;
}
.skill-tag {
  padding: 9px 13px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--panel);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
}

/* Projects grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 14px;
}
.project-card {
  padding: 15px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 6px 14px -10px rgba(0,0,0,0.4);
  display: flex;
  flex-direction: column;
}
.project-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
}
.project-tech {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 10px;
  flex-grow: 1;
}
.project-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  margin-top: auto;
}
.project-link:hover {
  text-decoration: underline;
}

/* Certifications grid */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 14px;
}
.cert-card {
  padding: 15px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 6px 14px -10px rgba(0,0,0,0.4);
}
.cert-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
}
.cert-hours {
  font-size: 12px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 4px;
}
.cert-academy {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}
.cert-id {
  font-size: 11px;
  color: var(--muted);
  opacity: 0.8;
}

/* Scroll-to-top */
.theme-dark .lmpixels-scroll-to-top {
  background-color: var(--panel) !important;
  border-color: var(--border) !important;
  color: var(--text) !important;
}

/* Light theme structural overrides (keep original feel) */
.theme-light .page-container,
.theme-light .header-content,
.theme-light .site-footer,
.theme-light .page-title {
  background-color: var(--panel) !important;
  color: var(--text) !important;
  border-color: var(--border) !important;
}
.theme-light .site-main-menu li a { color: var(--text) !important; }
.theme-light a { color: var(--primary) !important; }

/* Theme toggle placement */
.theme-toggle-container {
  float: right;
}
#theme-toggle {
  padding: 6px 10px;
  line-height: 1;
}