/* Custom styles */

:root {
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-text: #212529;
  --color-heading: #212529;
  --color-muted: #6c757d;
  --color-accent: #0076df;
  --color-accent-dark: #0056b3;
  --color-border: #dee2e6;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --radius: 8px;
  --font-sans: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --nav-height: 57px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
}

body.fixed-top-nav {
  padding-top: var(--nav-height);
}

h1, h2, h3, h4, h5, h6,
.section-title h3 {
  color: var(--color-heading);
  font-weight: 600;
}

a {
  color: var(--color-accent);
}

a:hover {
  color: var(--color-accent-dark);
}

/* Navbar */
#mainNav {
  background: var(--color-bg) !important;
  box-shadow: none !important;
  border-bottom: 1px solid var(--color-border);
  padding: 0.5rem 0;
  min-height: var(--nav-height);
}

#mainNav.navbar-shrink {
  background: var(--color-bg) !important;
  box-shadow: none !important;
}

#mainNav .nav-link {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text) !important;
  padding: 0.5rem 0.75rem !important;
}

#mainNav .nav-link.active,
#mainNav .nav-link:hover {
  color: var(--color-text) !important;
}

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

#mainNav .navbar-toggler {
  border-color: var(--color-border);
}

/* About / intro */
.page-main,
.page-main p,
.page-main h1,
.about-intro,
.intro-text,
.intro-text p {
  color: var(--color-text) !important;
}

.page-main {
  max-width: 800px;
  margin-top: 2.5rem;
  margin-bottom: 3rem;
}

.post-header {
  margin-bottom: 1.5rem;
  background: transparent !important;
}

.post-header .desc,
.page-main .desc {
  background: transparent !important;
  border: none !important;
  padding: 0 !important;
  position: static !important;
}

.desc {
  font-size: 1.05rem;
  color: var(--color-muted);
  margin: 0;
}

.post-title {
  font-size: 2.25rem;
  font-weight: 400;
  color: var(--color-heading);
  margin-bottom: 0.35rem;
}

.post-title .font-weight-bold {
  font-weight: 700 !important;
}

.post-header .desc a,
.page-main .desc a {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-color: rgba(0, 0, 0, 0.25);
}

.post-header .desc a:hover,
.page-main .desc a:hover {
  color: var(--color-accent);
}

.about-intro {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-text);
}

.intro-text p {
  margin-bottom: 1rem;
  color: var(--color-text);
}

.profile {
  width: 100%;
  max-width: 270px;
  margin-left: 1.5rem;
  margin-bottom: 1rem;
  text-align: center;
}

.profile-photo {
  width: 100%;
  max-width: 270px;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.more-info {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.more-info p {
  margin: 0.15rem 0;
}

.social {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.contact-icons a {
  font-size: 1.35rem;
  color: var(--color-muted);
  margin-right: 0.65rem;
  transition: color 0.2s ease;
}

.contact-icons a:hover {
  color: var(--color-text);
}

.contact-note {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* Sections */
.section.wb,
#about,
#services,
#achievement,
#portfolio,
#contact {
  padding: 3rem 0;
}

.section-title h3 {
  font-size: 1.75rem;
  margin-bottom: 2rem;
}

.section-title h3::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  background: var(--color-accent);
  margin: 0.75rem auto 0;
  border-radius: 2px;
}

/* Experience cards */
.experience-row {
  margin-bottom: 2rem;
}

.experience-row:last-child {
  margin-bottom: 0;
}

.experience-media {
  height: 100%;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem;
  margin-bottom: 1rem;
}

.experience-photo {
  width: 100%;
  height: 100%;
  max-height: 340px;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.experience-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 2rem;
  height: 100%;
  border: 1px solid var(--color-border);
}

.experience-card h2 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
  color: var(--color-heading);
}

.experience-card img,
.education-block img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.education-block {
  display: flex;
  align-items: stretch;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.education-block--reverse {
  flex-direction: row-reverse;
}

.education-media {
  flex: 0 0 38%;
  max-width: 38%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background: #f8f9fa;
  border-right: 1px solid var(--color-border);
}

.education-block--reverse .education-media {
  border-right: none;
  border-left: 1px solid var(--color-border);
}

.education-media img {
  width: 100%;
  height: auto;
  max-height: 260px;
  object-fit: contain;
  object-position: center;
  box-shadow: none;
}

.education-block .edu-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.5rem 2rem;
}

.education-block h2 {
  font-size: 1.35rem;
  color: var(--color-heading);
}

/* Achievements */
.collapsible {
  background: var(--color-surface);
  color: var(--color-heading);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.collapsible:hover,
.collapsible.active {
  background: #f8f9fa;
}

.collapsible + .content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  margin-top: -0.75rem;
  margin-bottom: 0.75rem;
  padding: 0 1.25rem;
}

.collapsible.active + .content {
  padding: 1rem 1.25rem;
}

/* Publication cards */
.publication-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.publication-card:hover {
  box-shadow: var(--shadow-sm);
  border-color: #b6d4fe;
}

.pub-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.pub-year,
.pub-venue {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

.pub-year {
  background: #e7f1ff;
  color: #0056b3;
}

.pub-venue {
  background: #f8f9fa;
  color: var(--color-muted);
}

.pub-title {
  font-size: 0.95rem;
  line-height: 1.45;
  margin-bottom: 0.65rem;
  flex-grow: 1;
}

.pub-title a {
  color: var(--color-heading);
  text-decoration: none;
}

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

.pub-authors {
  font-size: 0.8rem;
  color: var(--color-muted);
  line-height: 1.5;
  margin: 0;
}

#portfolio .row {
  row-gap: 1.25rem;
}

#contact.section.db,
.section.db,
#contact {
  background: #ffffff !important;
  background-image: none !important;
}

#contact.contact-section {
  background: #ffffff;
  border-top: 1px solid var(--color-border);
  padding: 3rem 0 4rem;
}

#contact .section-title h3,
#contact .big-icons,
#contact .custom-div a,
#contact .horizontal-icons,
#contact .horizontal-icons a {
  color: var(--color-heading) !important;
}

#contact .horizontal-icons i {
  color: var(--color-muted);
}

#contact.section.db {
  background: #ffffff;
}

.horizontal-icons {
  display: inline-block;
  margin: 0 1rem 0.5rem;
}

.dmtop.global-radius {
  background: var(--color-accent) !important;
}

@media (max-width: 768px) {
  .profile {
    float: none !important;
    margin: 0 auto 1.5rem;
  }

  .page-main {
    margin-top: 1.5rem;
  }

  .post-title {
    font-size: 1.85rem;
  }

  .experience-media {
    min-height: auto;
    margin-bottom: 1rem;
  }

  .experience-photo {
    max-height: 240px;
  }

  .education-block,
  .education-block--reverse {
    flex-direction: column;
  }

  .education-media {
    flex: none;
    max-width: 100%;
    border-right: none !important;
    border-left: none !important;
    border-bottom: 1px solid var(--color-border);
    padding: 1rem;
  }

  .education-media img {
    max-height: 220px;
  }

  .education-block img {
    width: 100% !important;
  }
}

@media (max-width: 991px) {
  #mainNav,
  #mainNav.navbar-shrink {
    background: var(--color-bg) !important;
  }

  #mainNav .navbar-collapse {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    margin-top: 0.5rem;
    padding-bottom: 0.5rem;
  }
}