/* ==========================================================================
   Custom Styles — Modern components, layout overrides, typography
   Loaded AFTER theme.css. Uses CSS variables defined there.
   ========================================================================== */

/* ---- Typography ---- */
body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
h1, h2, h3, h4, h5, h6 {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif !important;
  font-weight: 700;
  letter-spacing: -0.01em;
}
code, pre, kbd, samp {
  font-family: "JetBrains Mono", "Fira Code", "Consolas", monospace !important;
}

/* ---- Masthead enhancements ---- */
.masthead {
  position: sticky !important;
  top: 0;
  z-index: 1000;
}
.site-title-gradient {
  background: linear-gradient(
    135deg,
    var(--color-gradient-start),
    var(--color-gradient-end)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}
.theme-toggle-btn {
  background: none;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  width: 34px;
  height: 34px;
  cursor: pointer;
  color: var(--color-text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  padding: 0;
  font-size: 14px;
  vertical-align: middle;
  line-height: 1;
}
.theme-toggle-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent) !important;
  transform: rotate(20deg);
}
.masthead__menu-item--toggle {
  display: flex;
  align-items: center;
}

/* ---- Button variants ---- */
.btn--accent {
  background: linear-gradient(
    135deg,
    var(--color-gradient-start),
    var(--color-gradient-end)
  ) !important;
  color: #fff !important;
  border: none !important;
  border-radius: var(--border-radius-sm) !important;
  padding: 0.65em 1.6em !important;
  font-weight: 600 !important;
  font-size: 0.9rem !important;
  transition: all var(--transition-base) !important;
  box-shadow: 0 4px 15px rgba(108, 92, 231, 0.25);
  text-decoration: none !important;
  display: inline-block;
}
.btn--accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(108, 92, 231, 0.35);
  color: #fff !important;
}
.btn--outline {
  background: transparent !important;
  color: var(--color-text-primary) !important;
  border: 2px solid var(--color-border) !important;
  border-radius: var(--border-radius-sm) !important;
  padding: 0.55em 1.6em !important;
  font-weight: 600 !important;
  font-size: 0.9rem !important;
  transition: all var(--transition-base) !important;
  text-decoration: none !important;
  display: inline-block;
}
.btn--outline:hover {
  border-color: var(--color-accent) !important;
  color: var(--color-accent) !important;
  transform: translateY(-1px);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  padding: 3rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}
.hero__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 4rem;
}
.hero__text {
  flex: 1;
  max-width: 620px;
}
.hero__greeting {
  font-size: 0.95rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 3px;
}
.hero__name {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.08;
  margin: 0 0 0.6rem;
  background: linear-gradient(
    135deg,
    var(--color-gradient-start),
    var(--color-gradient-end)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  min-height: 2.2rem;
  font-weight: 400;
}
.hero__cursor {
  animation: blink 1s step-end infinite;
  color: var(--color-accent);
  font-weight: 300;
}
@keyframes blink {
  50% {
    opacity: 0;
  }
}
.hero__bio {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--color-text-secondary) !important;
  margin-bottom: 2rem;
  max-width: 540px;
}
.hero__actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.hero__social {
  display: flex;
  gap: 1.3rem;
}
.hero__social a {
  color: var(--color-text-muted) !important;
  font-size: 1.35rem;
  transition: all var(--transition-base);
  text-decoration: none !important;
}
.hero__social a:hover {
  color: var(--color-accent) !important;
  transform: translateY(-3px);
}
.hero__image {
  flex-shrink: 0;
}
.hero__avatar-wrapper {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  overflow: hidden;
  position: relative;
  padding: 4px;
  background: linear-gradient(
    135deg,
    var(--color-gradient-start),
    var(--color-gradient-end)
  );
  box-shadow: var(--shadow-lg);
}
.hero__avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: 2rem 1.2rem;
  }
  .hero__inner {
    flex-direction: column-reverse;
    text-align: center;
    gap: 2rem;
  }
  .hero__actions {
    justify-content: center;
  }
  .hero__social {
    justify-content: center;
  }
  .hero__avatar-wrapper {
    width: 180px;
    height: 180px;
  }
  .hero__bio {
    margin-left: auto;
    margin-right: auto;
  }
}

/* ==========================================================================
   HOME SECTIONS
   ========================================================================== */
.home-section {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}
.home-section--alt {
  background: var(--color-bg-secondary);
  max-width: 100%;
}
.home-section--alt .home-section__inner {
  max-width: 1200px;
  margin: 0 auto;
}
.section-heading {
  font-size: 1.7rem;
  font-weight: 700;
  margin-bottom: 2rem;
  border-bottom: none !important;
  padding-bottom: 0 !important;
  color: var(--color-text-primary) !important;
}
.section-heading__accent {
  color: var(--color-accent);
  margin-right: 0.5rem;
  font-weight: 800;
}
.section-cta {
  text-align: center;
  margin-top: 2.5rem;
}

/* ==========================================================================
   SKILL TAGS / CHIPS
   ========================================================================== */
.skills-group {
  margin-bottom: 1.8rem;
}
.skills-group__title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-text-muted) !important;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.8rem;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.skill-tag {
  display: inline-block;
  padding: 0.35em 0.95em;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 500;
  transition: all var(--transition-base);
  border: 1px solid transparent;
}
.skill-tag:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.skill-tag--ml {
  background: var(--color-tag-bg-ml);
  color: var(--color-tag-text-ml);
}
.skill-tag--astro {
  background: var(--color-tag-bg-astro);
  color: var(--color-tag-text-astro);
}

/* ==========================================================================
   PROJECT CARDS
   ========================================================================== */
.project-cards,
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 1.8rem;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}
.project-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}
.project-card__icon {
  width: 46px;
  height: 46px;
  border-radius: var(--border-radius-sm);
  background: linear-gradient(
    135deg,
    var(--color-gradient-start),
    var(--color-gradient-end)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.15rem;
  flex-shrink: 0;
}
.project-card__category {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--color-accent);
}
.project-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.7rem;
  color: var(--color-text-primary) !important;
}
.project-card__desc {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--color-text-secondary) !important;
  flex-grow: 1;
  margin-bottom: 0;
}
.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1rem 0;
}
.project-card__tag {
  padding: 0.2em 0.7em;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  border-radius: 12px;
  font-size: 0.72rem;
  font-weight: 600;
}
.project-card__links {
  display: flex;
  gap: 1.2rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}
.project-card__link {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--color-accent) !important;
  text-decoration: none !important;
  transition: all var(--transition-base);
}
.project-card__link:hover {
  opacity: 0.75;
}
.project-card__link i {
  margin-right: 0.3rem;
}

/* ==========================================================================
   PUBLICATION LIST (homepage)
   ========================================================================== */
.pub-list {
  display: flex;
  flex-direction: column;
}
.pub-item {
  display: flex;
  gap: 1.5rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}
.pub-item:last-child {
  border-bottom: none;
}
.pub-item__year {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-accent);
  min-width: 48px;
  padding-top: 2px;
  flex-shrink: 0;
}
.pub-item__content {
  flex: 1;
}
.pub-item__title {
  font-weight: 600;
  font-size: 0.95rem;
  display: block;
  margin-bottom: 0.25rem;
  text-decoration: none !important;
  color: var(--color-text-primary) !important;
}
.pub-item__title:hover {
  color: var(--color-accent) !important;
}
.pub-item__venue {
  font-size: 0.82rem;
  color: var(--color-text-muted) !important;
  font-style: italic;
  margin: 0;
}

/* ==========================================================================
   CV TIMELINE
   ========================================================================== */
.cv-download {
  margin-bottom: 2.5rem;
}
.cv-timeline {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 1rem;
}
.cv-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--color-gradient-start),
    var(--color-gradient-end)
  );
  border-radius: 2px;
}
.timeline-item {
  position: relative;
  padding-bottom: 2rem;
  padding-left: 1.2rem;
}
.timeline-item:last-child {
  padding-bottom: 0;
}
.timeline-item__marker {
  position: absolute;
  left: -1.55rem;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg-primary);
  box-shadow: 0 0 0 2px var(--color-accent);
  transition: background var(--transition-base), border-color var(--transition-base),
    box-shadow var(--transition-base);
}
.timeline-item__date {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  display: block;
  margin-bottom: 0.2rem;
}
.timeline-item__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0.2rem 0 0.15rem;
  color: var(--color-text-primary) !important;
}
.timeline-item__org {
  color: var(--color-text-secondary) !important;
  font-size: 0.92rem;
  margin: 0;
}
.timeline-item__desc {
  font-size: 0.85rem;
  color: var(--color-text-muted) !important;
  margin: 0.3rem 0 0;
  line-height: 1.6;
}

/* CV Skills grid */
.cv-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.2rem;
  margin-bottom: 2rem;
}
.cv-skill-category {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 1.4rem;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.cv-skill-category:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}
.cv-skill-category h4 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-text-muted) !important;
  margin: 0 0 0.9rem;
  font-weight: 700;
}

/* ==========================================================================
   FOOTER MODERN
   ========================================================================== */
.page__footer-follow { display: none !important; }
.page__footer-copyright { display: none !important; }

.footer-modern {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}
.footer-modern__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 0;
  border-bottom: 1px solid var(--color-border);
}
.footer-modern__name {
  font-size: 1.15rem;
  margin: 0 0 0.25rem;
  background: linear-gradient(
    135deg,
    var(--color-gradient-start),
    var(--color-gradient-end)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}
.footer-modern__tagline {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin: 0;
}
.footer-modern__social {
  display: flex;
  gap: 1.3rem;
}
.footer-modern__social a {
  color: var(--color-text-muted) !important;
  font-size: 1.15rem;
  transition: all var(--transition-base);
  text-decoration: none !important;
}
.footer-modern__social a:hover {
  color: var(--color-accent) !important;
  transform: translateY(-2px);
}
.footer-modern__bottom {
  padding: 1.5rem 0;
  text-align: center;
}
.footer-modern__bottom p {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin: 0;
}
.footer-modern__bottom a {
  color: var(--color-accent) !important;
  text-decoration: none !important;
}

@media (max-width: 600px) {
  .footer-modern__inner {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
  }
}

/* ==========================================================================
   ARCHIVE / EXISTING PAGE ENHANCEMENTS
   ========================================================================== */
.archive__item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}
.archive__item:last-child {
  border-bottom: none;
}
.archive__item-title {
  font-size: 1.05rem;
}
.archive__item-title a {
  text-decoration: none !important;
}

/* Smooth scroll */
html {
  scroll-behavior: smooth;
}

/* Selection color */
::selection {
  background: var(--color-accent);
  color: #fff;
}

/* Better focus styles */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Scrollbar styling for dark mode */
[data-theme="dark"] ::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
[data-theme="dark"] ::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
}
[data-theme="dark"] ::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}
[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* Page entrance animation */
#main {
  animation: fadeInUp 0.5s ease both !important;
  animation-delay: 0.1s !important;
}
.hero {
  animation: fadeInUp 0.6s ease both;
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}