/* ============================================================
   custom.css — Site-wide additions for nvnsthapa.github.io
   Dark mode · Scroll-reveal · Fieldwork map · Teaching section
   ============================================================ */

/* ----------------------------------------------------------
   1. CSS CUSTOM PROPERTIES (Light & Dark themes)
   ---------------------------------------------------------- */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-card: #ffffff;
  --bg-navbar: #f5f5f5;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #868e96;
  --border-color: #dee2e6;
  --accent-color: #0062cc;
  --accent-hover: #004fa3;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.07);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
  --transition-speed: 0.3s;
}

[data-theme="dark"] {
  --bg-primary: #121212;
  --bg-secondary: #1e1e1e;
  --bg-card: #1e1e1e;
  --bg-navbar: #1a1a1a;
  --text-primary: #e8e8e8;
  --text-secondary: #aaaaaa;
  --text-muted: #777777;
  --border-color: #333333;
  --accent-color: #4ea8ff;
  --accent-hover: #80c1ff;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.55);
}

/* ----------------------------------------------------------
   2. GLOBAL DARK-MODE OVERRIDES
   ---------------------------------------------------------- */
[data-theme="dark"] body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

[data-theme="dark"] .navbar {
  background-color: var(--bg-navbar) !important;
  border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .navbar-brand,
[data-theme="dark"] .nav-link {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .nav-link:hover {
  color: var(--accent-color) !important;
}

[data-theme="dark"] .content,
[data-theme="dark"] main {
  background-color: var(--bg-primary);
}

[data-theme="dark"] footer {
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
}

[data-theme="dark"] .card {
  background-color: var(--bg-card);
  border-color: var(--border-color);
  color: var(--text-primary);
}

[data-theme="dark"] .card-title,
[data-theme="dark"] .card-text {
  color: var(--text-primary);
}

[data-theme="dark"] h1, [data-theme="dark"] h2,
[data-theme="dark"] h3, [data-theme="dark"] h4,
[data-theme="dark"] h5, [data-theme="dark"] h6 {
  color: var(--text-primary);
}

[data-theme="dark"] p,
[data-theme="dark"] li {
  color: var(--text-secondary);
}

[data-theme="dark"] a {
  color: var(--accent-color);
}

[data-theme="dark"] a:hover {
  color: var(--accent-hover);
}

[data-theme="dark"] .academic-kicker,
[data-theme="dark"] .eyebrow {
  color: var(--text-muted);
}

[data-theme="dark"] .academic-hero {
  background-color: var(--bg-primary);
}

[data-theme="dark"] .academic-hero__profile > div {
  color: var(--text-secondary);
}

[data-theme="dark"] .research-focus {
  background-color: var(--bg-secondary);
}

[data-theme="dark"] .research-focus article {
  background-color: var(--bg-card);
  border-color: var(--border-color);
}

[data-theme="dark"] .research-focus article h3 {
  color: var(--text-primary);
}

/* ----------------------------------------------------------
   RESEARCH FOCUS TABS
   ---------------------------------------------------------- */
.research-focus__tabs {
  margin-top: 0.5rem;
}

.research-focus__nav {
  flex-wrap: wrap;
  gap: 0.35rem;
  border-bottom: 1px solid var(--border-color, var(--academic-line));
  margin-bottom: 0;
}

.research-focus__nav .nav-item {
  margin-bottom: -1px;
}

.research-focus__nav .nav-link {
  border: 1px solid transparent;
  border-radius: 8px 8px 0 0;
  padding: 0.7rem 1rem;
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-secondary, var(--academic-muted));
  background: transparent;
  transition: color 0.2s, border-color 0.2s, background-color 0.2s;
}

.research-focus__nav .nav-link:hover,
.research-focus__nav .nav-link:focus {
  color: var(--accent-color, #8f1d1d);
  border-color: transparent;
  background: rgba(143, 29, 29, 0.04);
}

.research-focus__nav .nav-link.active {
  color: var(--accent-color, #8f1d1d);
  border-color: var(--border-color, var(--academic-line));
  border-bottom-color: var(--bg-secondary, var(--academic-surface));
  background: var(--bg-secondary, var(--academic-surface));
}

.research-focus__panels {
  border: 1px solid var(--border-color, var(--academic-line));
  border-top: 0;
  border-radius: 0 0 8px 8px;
  background: var(--bg-secondary, var(--academic-surface));
  box-shadow: 0 12px 30px rgba(32, 42, 51, 0.05);
}

.research-focus__panels article {
  padding: 1.5rem 1.35rem;
}

.research-focus__panels h3 {
  margin-bottom: 0.35rem;
  color: var(--text-primary, var(--academic-ink));
  font-size: 1.15rem;
  line-height: 1.35;
}

.research-focus__tagline {
  margin: 0 0 0.85rem;
  color: var(--accent-color, #8f1d1d);
  font-size: 0.92rem;
  font-weight: 500;
  font-style: italic;
  line-height: 1.45;
}

.research-focus__panels p:not(.research-focus__tagline) {
  margin: 0;
  color: var(--text-secondary, var(--academic-muted));
  line-height: 1.75;
}

[data-theme="dark"] .research-focus__tagline {
  color: var(--accent-color);
}

[data-theme="dark"] .research-focus__nav .nav-link.active {
  border-bottom-color: var(--bg-secondary);
  background: var(--bg-secondary);
}

[data-theme="dark"] .research-focus__panels {
  background: var(--bg-card);
  border-color: var(--border-color);
}

@media (max-width: 767px) {
  .research-focus__nav .nav-link {
    border-radius: 8px;
    font-size: 0.82rem;
    padding: 0.6rem 0.75rem;
  }

  .research-focus__nav .nav-link.active {
    border-radius: 8px;
    border-bottom-color: var(--border-color, var(--academic-line));
  }

  .research-focus__panels {
    border-top: 1px solid var(--border-color, var(--academic-line));
    margin-top: 0.75rem;
    border-radius: 8px;
  }
}

/* ----------------------------------------------------------
   9. ORCID & GITHUB HERO LINK STYLES
   ---------------------------------------------------------- */

[data-theme="dark"] .academic-narrative {
  background-color: var(--bg-primary);
}

[data-theme="dark"] .selected-publications {
  background-color: var(--bg-secondary);
}

[data-theme="dark"] .selected-publications article {
  background-color: var(--bg-card);
  border-color: var(--border-color);
}

[data-theme="dark"] .publication-grid article span {
  color: var(--text-muted);
}

[data-theme="dark"] .highlight-grid article {
  background-color: var(--bg-card);
}

[data-theme="dark"] .home-section {
  background-color: var(--bg-primary);
}

[data-theme="dark"] .badge.primary-color {
  background-color: #004fa3 !important;
  color: #fff !important;
}

[data-theme="dark"] .project-portfolio-card {
  background-color: var(--bg-card);
  border-color: var(--border-color);
}

[data-theme="dark"] .publication-item {
  border-color: var(--border-color);
}

[data-theme="dark"] .publication-year {
  color: var(--text-muted);
}

[data-theme="dark"] .activity-event {
  border-color: var(--border-color);
  background-color: var(--bg-card);
}

[data-theme="dark"] .activity-date {
  color: var(--text-muted);
}

[data-theme="dark"] .btn-primary {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
}

/* ----------------------------------------------------------
   3. DARK MODE TOGGLE BUTTON
   ---------------------------------------------------------- */
#dark-mode-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  background: transparent;
  transition: background var(--transition-speed), transform 0.2s;
  margin-left: 8px;
  color: var(--text-primary);
  font-size: 1.1rem;
  vertical-align: middle;
}

#dark-mode-toggle:hover {
  background-color: rgba(128,128,128,0.15);
  transform: rotate(20deg);
}

#dark-mode-toggle .icon-sun,
#dark-mode-toggle .icon-moon {
  display: none;
  line-height: 1;
}

[data-theme="light"] #dark-mode-toggle .icon-moon,
:root:not([data-theme]) #dark-mode-toggle .icon-moon {
  display: inline;
}

[data-theme="dark"] #dark-mode-toggle .icon-sun {
  display: inline;
}

/* ----------------------------------------------------------
   4. SCROLL-REVEAL ANIMATIONS
   ---------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.reveal--left {
  transform: translateX(-28px);
}

.reveal.reveal--right {
  transform: translateX(28px);
}

.reveal.is-visible {
  opacity: 1;
  transform: translate(0, 0);
}

/* Stagger children inside a reveal container */
.reveal-group > * {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal-group.is-visible > *:nth-child(1) { transition-delay: 0.05s; opacity:1; transform:none; }
.reveal-group.is-visible > *:nth-child(2) { transition-delay: 0.15s; opacity:1; transform:none; }
.reveal-group.is-visible > *:nth-child(3) { transition-delay: 0.25s; opacity:1; transform:none; }
.reveal-group.is-visible > *:nth-child(4) { transition-delay: 0.35s; opacity:1; transform:none; }
.reveal-group.is-visible > *:nth-child(5) { transition-delay: 0.45s; opacity:1; transform:none; }
.reveal-group.is-visible > *:nth-child(6) { transition-delay: 0.55s; opacity:1; transform:none; }

/* ----------------------------------------------------------
   5. FIELDWORK MAP SECTION
   ---------------------------------------------------------- */
.fieldwork-map-section {
  padding: 4rem 0;
  background-color: var(--bg-secondary);
}

[data-theme="dark"] .fieldwork-map-section {
  background-color: #161616;
}

.fieldwork-map-section .academic-section__heading {
  margin-bottom: 2rem;
}

#fieldwork-map {
  width: 100%;
  height: 380px;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.fieldwork-map-section .map-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-top: 1.25rem;
  justify-content: center;
}

.fieldwork-map-section .map-legend-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.fieldwork-map-section .map-legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.map-legend-dot--institution { background-color: #2563eb; }
.map-legend-dot--fieldwork   { background-color: #16a34a; }
.map-legend-dot--origin      { background-color: #dc2626; }
.map-legend-dot--workshop    { background-color: #d97706; }

/* Leaflet dark-mode adjustments */
[data-theme="dark"] .leaflet-tile-pane {
  filter: invert(1) hue-rotate(180deg) brightness(0.85) saturate(0.9);
}

[data-theme="dark"] .leaflet-container {
  background: #242424;
}

[data-theme="dark"] .leaflet-popup-content-wrapper,
[data-theme="dark"] .leaflet-popup-tip {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
}

/* ----------------------------------------------------------
   6. TEACHING / MENTORING SECTION
   ---------------------------------------------------------- */
.teaching-section {
  padding: 4rem 0;
  background-color: var(--bg-primary);
}

[data-theme="dark"] .teaching-section {
  background-color: var(--bg-primary);
}

.teaching-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.teaching-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.6rem 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s, box-shadow 0.25s;
  position: relative;
  overflow: hidden;
}

.teaching-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent-color);
  border-radius: 4px 0 0 4px;
}

.teaching-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.teaching-card__role {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}

.teaching-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 0.3rem;
}

.teaching-card__meta {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.teaching-card p {
  font-size: 0.87rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

/* ----------------------------------------------------------
   7. FOOTER ENHANCEMENTS
   ---------------------------------------------------------- */
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1.25rem 2rem;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent-color);
}

.footer-back-top {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-decoration: none;
  transition: color 0.2s;
}

.footer-back-top:hover {
  color: var(--accent-color);
}

/* ----------------------------------------------------------
   8. HOMEPAGE SELECTED PUBLICATIONS — Dimensions badges
   ---------------------------------------------------------- */
.pub-card-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

.pub-card-actions a {
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--accent-color);
  transition: color 0.2s;
}

.pub-card-actions a:hover {
  color: var(--accent-hover);
}

/* ----------------------------------------------------------
   9. ORCID & GITHUB HERO LINK STYLES
   ---------------------------------------------------------- */
.academic-actions a[href*="orcid"],
.academic-actions a[href*="github"] {
  /* these inherit the existing .academic-actions styles */
}

/* ensure SVG icons in hero links size properly */
.academic-actions a svg {
  width: 1em;
  height: 1em;
  vertical-align: -0.125em;
  margin-right: 0.2em;
}

/* ----------------------------------------------------------
   10. SITE-WIDE LAYOUT WIDTH
   Keep a consistent page frame across the site while preserving
   narrower text measures inside content-heavy sections.
   ---------------------------------------------------------- */
@media (min-width: 1200px) {
  #navbar.navbar .container-fluid,
  .navbar .container-fluid,
  .content,
  .container-fluid,
  .academic-home,
  body:not(.home-page) .content,
  .publication-page,
  .projects-page,
  .activities-page {
    max-width: 1380px;
  }

  .academic-home {
    padding-right: 1.75rem;
    padding-left: 1.75rem;
  }

  .academic-hero {
    grid-template-columns: minmax(0, 1.12fr) 380px;
    gap: 4rem;
  }

  .academic-hero__copy p:not(.academic-kicker) {
    max-width: 860px;
  }

  .academic-section {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 3rem;
  }

  body:not(.home-page) .content > h6,
  .page-intro h6,
  .activities-hero__content,
  .academic-narrative__body {
    max-width: 820px;
  }
}

/* ----------------------------------------------------------
   11. GLASS NAVBAR
   ---------------------------------------------------------- */
#navbar.navbar {
  min-height: 78px;
  padding: 0.7rem 0;
  border-bottom: 0 !important;
  background: rgba(20, 31, 42, 0.68) !important;
  backdrop-filter: blur(18px) saturate(170%);
  -webkit-backdrop-filter: blur(18px) saturate(170%);
  box-shadow: 0 18px 42px rgba(12, 20, 28, 0.16) !important;
}

#navbar.navbar::after {
  display: none;
}

#navbar.navbar .container-fluid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  column-gap: 1rem;
  min-height: 0;
  padding-right: 1.25rem !important;
  padding-left: 1.25rem !important;
}

#navbar .navbar-brand {
  display: none !important;
}

#navbar .navbar-toggler {
  grid-column: 1;
  justify-self: start;
  align-self: center;
  margin-left: 0;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

#navbar .navbar-toggler:hover,
#navbar .navbar-toggler:focus {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.28);
}

#navbar .navbar-toggler-icon {
  filter: invert(1) grayscale(1) brightness(1.85);
}

#navbar .navbar-collapse {
  grid-column: 2;
  align-items: center;
  justify-content: center;
}

#navbar .navbar-nav {
  margin: 0;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
}

#navbar .navbar-nav .nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0.45rem 0.92rem;
  border: 1px solid transparent;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.82) !important;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0;
}

#navbar .navbar-nav .nav-link:hover,
#navbar .navbar-nav .nav-link:focus {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff !important;
  text-decoration: none;
}

#navbar .navbar-active .nav-link {
  border-color: rgba(255, 255, 255, 0.88);
  background: rgba(255, 248, 240, 0.96);
  color: #17212b !important;
  box-shadow: 0 10px 24px rgba(10, 18, 24, 0.14);
}

#navbar .navbar-active .nav-link::after {
  display: none !important;
}

#dark-mode-toggle {
  grid-column: 3;
  justify-self: end;
  width: 40px;
  height: 40px;
  margin-left: 0;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

#dark-mode-toggle:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: rotate(16deg);
}

body {
  padding-top: 96px;
}

#progress,
.progress-container {
  top: 78px;
}

[data-theme="dark"] #navbar.navbar {
  background: rgba(10, 16, 23, 0.78) !important;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.3) !important;
}

@media (max-width: 767.98px) {
  #navbar.navbar {
    min-height: 72px;
    padding: 0.5rem 0;
  }

  #navbar.navbar .container-fluid {
    grid-template-columns: auto 1fr auto;
    row-gap: 0.55rem;
  }

  #navbar .navbar-collapse {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    padding-top: 0.15rem;
    justify-content: flex-start;
  }

  #navbar .navbar-nav {
    align-items: stretch;
    gap: 0.35rem;
    padding: 0.65rem;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 18px;
    background: rgba(11, 19, 28, 0.68);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }

  #navbar .navbar-nav .nav-link {
    justify-content: flex-start;
    width: 100%;
    border-radius: 12px;
    padding: 0.62rem 0.9rem;
  }

  #dark-mode-toggle {
    width: 38px;
    height: 38px;
  }

  body {
    padding-top: 90px;
  }

  #progress,
  .progress-container {
    top: 72px;
  }
}