/* ==========================================================================
   BASE & COMMON STYLES
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
  width: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--current-font, var(--font-primary));
  background-color: var(--bg-main);
  color: var(--text-body);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: clip;
  position: relative;
}

/* Canvas background for matrix */
#matrix-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.22;
  display: none;
}

[data-template="matrix"] #matrix-canvas {
  display: block;
}

/* App container */
#app {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-wide {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-heading);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-sm);
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  font-size: 0.85rem;
  font-weight: 800;
  font-family: var(--font-mono);
}

.brand-logo-img {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent-primary);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
  flex-shrink: 0;
}

.brand:hover .brand-logo-img {
  transform: scale(1.08);
  border-color: var(--text-heading);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.4rem 0.2rem;
  position: relative;
  transition: color var(--transition-fast);
}

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

.nav-link.active {
  color: var(--nav-active);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--nav-active);
  border-radius: var(--radius-full);
}

.nav-divider-vertical {
  width: 1px;
  height: 1.25rem;
  background-color: var(--border-card);
  margin: 0 0.25rem;
}

.nav-section-link {
  font-size: 0.88rem;
  padding: 0.35rem 0.55rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-section-link:hover {
  color: var(--link-hover);
  background-color: var(--bg-alt);
}

.nav-section-link.active {
  color: var(--nav-active);
  font-weight: 700;
}

/* Nav controls (Template switcher & Theme toggle) */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Template Switcher */
.template-switcher {
  display: flex;
  align-items: center;
  background-color: var(--bg-alt);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.template-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: all var(--transition-fast);
}

.template-btn:hover {
  color: var(--text-heading);
}

.template-btn.active {
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  font-weight: 600;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  background-color: var(--bg-alt);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  transition: all var(--transition-fast);
  line-height: 1;
}

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

.lang-btn.active {
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  font-weight: 700;
}

.mobile-lang-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
  margin-top: 0.5rem;
}

/* Theme Toggle */
.theme-toggle-btn {
  background-color: var(--bg-alt);
  border: 1px solid var(--border-card);
  color: var(--text-heading);
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--text-heading);
}

.theme-toggle-btn svg {
  width: 1.15rem;
  height: 1.15rem;
  fill: currentColor;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  color: var(--text-heading);
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background-color: var(--bg-nav);
  border-bottom: 1px solid var(--border-card);
  max-height: calc(100vh - 4.25rem);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-menu.open {
  display: flex;
}

.mobile-template-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
  margin-top: 0.25rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  list-style: none;
}

/* ==========================================================================
   BUTTONS & COMMON UI
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border-color: var(--btn-primary-bg);
}

.btn-primary:hover {
  background-color: var(--btn-primary-hover);
  border-color: var(--btn-primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border-color: var(--btn-secondary-border);
}

.btn-secondary:hover {
  border-color: var(--text-heading);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
}

/* Dropdown for CV */
.cv-dropdown {
  position: relative;
  display: inline-block;
}

.cv-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.4rem;
  background-color: var(--bg-popover);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  min-width: 180px;
  padding: 0.4rem;
  display: none;
  flex-direction: column;
  gap: 0.2rem;
  z-index: 50;
}

.cv-menu.show {
  display: flex;
}

.cv-menu-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--text-heading);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: background-color var(--transition-fast);
}

.cv-menu-item:hover {
  background-color: var(--tag-bg);
}

/* Tags & Badges */
.tag {
  display: inline-flex;
  align-items: center;
  background-color: var(--tag-bg);
  color: var(--tag-text);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid var(--border-subtle);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-primary);
}

/* Section Header */
.section-header {
  margin-bottom: 2.5rem;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-muted);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.section-desc {
  margin-top: 0.75rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 650px;
}

/* Main Content Area */
main {
  flex: 1;
}

/* Footer */
.site-footer {
  background-color: var(--bg-alt);
  border-top: 1px solid var(--border-card);
  padding: 4rem 0 2.5rem;
  margin-top: 5rem;
  transition: background-color var(--transition-normal);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand h3 {
  color: var(--text-heading);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 380px;
}

.footer-col h4 {
  color: var(--text-heading);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--link-hover);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--divider);
  padding-top: 2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Toast notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background-color: var(--tooltip-bg);
  color: var(--tooltip-text);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  animation: toastIn 0.25s ease;
}

@keyframes toastIn {
  from {
    transform: translateY(1rem);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Responsive */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }
  .mobile-nav-toggle {
    display: inline-flex;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  .footer-bottom > div:last-child {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
  }
}

@media (max-width: 768px) {
  .container,
  .container-wide {
    padding: 0 1rem;
  }

  .nav-inner {
    height: 3.75rem;
    gap: 0.5rem;
  }

  .brand {
    font-size: 1.05rem;
    gap: 0.5rem;
  }

  .brand-logo-img {
    width: 2.1rem;
    height: 2.1rem;
  }

  .site-nav .nav-controls {
    gap: 0.45rem;
  }

  .back-to-top-btn {
    bottom: 1.25rem;
    right: 1.25rem;
    width: 2.65rem;
    height: 2.65rem;
  }

  .back-to-top-btn svg {
    width: 17px;
    height: 17px;
  }
}

/* Mobile Navigation Template Bar (Always visible in sticky header on mobile/tablet) */
.mobile-nav-template-bar {
  display: none;
  padding: 0.35rem 0.75rem 0.55rem;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-nav);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.mobile-nav-template-bar::-webkit-scrollbar {
  display: none;
}

.mobile-header-template-switcher {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
}

.mobile-header-template-switcher .template-btn {
  flex: 1;
  justify-content: center;
  white-space: nowrap;
  font-size: 0.78rem;
  padding: 0.35rem 0.5rem;
}

@media (max-width: 768px) {
  /* On mobile/tablet, show template switcher in the dedicated header bar */
  .mobile-nav-template-bar {
    display: flex;
  }

  /* Hide the top-row desktop template switcher on mobile to avoid overcrowding */
  .site-nav .desktop-template-switcher {
    display: none;
  }

  /* Keep language switcher in the header row on mobile */
  .site-nav .nav-controls .lang-switcher {
    display: flex !important;
  }

  .site-nav .nav-controls {
    gap: 0.4rem;
  }
}

@media (max-width: 600px) {
  .site-nav .desktop-template-switcher {
    display: none;
  }
  .mobile-menu .template-btn span.label {
    display: inline;
  }
}

@media (max-width: 480px) {
  .brand {
    font-size: 0.95rem;
    gap: 0.45rem;
  }

  .brand-logo-img {
    width: 1.95rem;
    height: 1.95rem;
  }

  .site-nav .nav-controls {
    gap: 0.35rem;
  }

  .lang-btn {
    padding: 0.25rem 0.45rem;
    font-size: 0.72rem;
  }

  .mobile-nav-toggle {
    width: 2.25rem;
    height: 2.25rem;
  }

  .theme-toggle-btn {
    width: 2.1rem;
    height: 2.1rem;
  }

  .mobile-menu {
    padding: 1rem 0.85rem;
  }
}

@media (max-width: 375px) {
  .container,
  .container-wide {
    padding: 0 0.75rem;
  }

  .brand span {
    max-width: 110px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

/* ==========================================================================
   FLOATING BACK TO TOP BUTTON
   ========================================================================== */
.back-to-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3.1rem;
  height: 3.1rem;
  border-radius: 50%;
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border: 1px solid var(--border-card);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.22);
  cursor: pointer;
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease, background-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.back-to-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.back-to-top-btn:hover {
  background-color: var(--btn-primary-hover);
  transform: translateY(-3px) scale(1.06);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.3);
}

.back-to-top-btn:active {
  transform: translateY(0) scale(0.96);
}

/* ==========================================================================
   EDUCATION & VOLUNTEERING CARD LOGOS
   ========================================================================== */
.edu-card-logo {
  width: 3.25rem;
  height: 3.25rem;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  padding: 0.25rem;
  border: 1px solid var(--border-card);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  flex-shrink: 0;
  display: block;
}