/* ============================================================
   Al-folio inspired stylesheet
   ============================================================ */

/* ---------- Base ---------- */
:root {
  --af-accent: #0076df;
  --af-accent-hover: #0056a3;
  --af-text: #212529;
  --af-muted: #6c757d;
  --af-border: #dee2e6;
  --af-bg: #ffffff;
  --af-bg-secondary: #f8f9fa;
  --af-shadow: rgba(0, 0, 0, 0.08);
  --af-profile-size: 180px;
}

[data-bs-theme="dark"] {
  --af-text: #d3d3d3;
  --af-muted: #9a9a9a;
  --af-border: #333333;
  --af-bg: #1a1a2e;
  --af-bg-secondary: #16213e;
  --af-shadow: rgba(0, 0, 0, 0.3);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Roboto', Helvetica, Arial, sans-serif;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--af-text);
  background-color: var(--af-bg);
  padding-bottom: 4rem;
}

/* ---------- Links ---------- */
a {
  color: var(--af-accent);
  text-decoration: none;
}
a:hover {
  color: var(--af-accent-hover);
  text-decoration: underline;
}

/* ---------- Headings ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--af-text);
}

/* ---------- Navbar ---------- */
#navbar {
  background-color: var(--af-bg);
  border-bottom: 1px solid var(--af-border);
  box-shadow: 0 1px 8px var(--af-shadow);
  padding: 0.6rem 0;
  transition: background-color 0.2s, border-color 0.2s;
}

#navbar .navbar-brand {
  font-size: 1.05rem;
  color: var(--af-text) !important;
  letter-spacing: 0.01em;
}
#navbar .navbar-brand:hover {
  text-decoration: none;
  color: var(--af-accent) !important;
}

#navbar .nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--af-text) !important;
  padding: 0.4rem 0.8rem;
  border-radius: 0.25rem;
  transition: color 0.15s, background 0.15s;
}
#navbar .nav-link:hover,
#navbar .nav-link.active {
  color: var(--af-accent) !important;
  background-color: transparent;
  text-decoration: none;
}
#navbar .nav-link.active {
  font-weight: 700;
}

#theme-toggle {
  background: none;
  border: none;
  color: var(--af-muted);
  font-size: 1rem;
  padding: 0.4rem 0.5rem;
  transition: color 0.15s;
}
#theme-toggle:hover {
  color: var(--af-accent);
}

/* ---------- Profile column ---------- */
.profile-container {
  text-align: center;
}

.profile-img {
  width: 100%;
  max-width: 240px;
  height: auto;
  border-radius: 8px;
  border: 3px solid var(--af-border);
  box-shadow: 0 2px 12px var(--af-shadow);
}

.profile-img-placeholder {
  width: var(--af-profile-size);
  height: var(--af-profile-size);
  border-radius: 8px;
  border: 3px solid var(--af-border);
  background-color: var(--af-bg-secondary);
}

.profile-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0;
}

.profile-position {
  font-size: 0.82rem;
  color: var(--af-muted);
}

.more-info {
  font-size: 0.8rem;
  color: var(--af-muted);
}
.more-info p {
  margin-bottom: 0.2rem;
}

/* ---------- Social icons ---------- */
.social-icons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.1rem;
  margin-top: 0.75rem;
}

.social-icons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  font-size: 1.1rem;
  color: var(--af-muted);
  border-radius: 50%;
  transition: color 0.15s, background 0.15s;
}

.social-icons a:hover {
  color: var(--af-accent);
  background-color: var(--af-bg-secondary);
  text-decoration: none;
}

/* ---------- About / page content ---------- */
.about-text {
  font-size: 1rem;
  line-height: 1.75;
}

.about-text h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
}

.section-heading {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.section-hr {
  border-color: var(--af-border);
  opacity: 1;
  margin: 0.5rem 0 1.5rem;
}

/* ---------- Page titles ---------- */
.page-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.page-description {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ---------- News ---------- */
.news-table {
  width: 100%;
  border-collapse: collapse;
}
.news-table tr {
  border-bottom: 1px solid var(--af-border);
}
.news-table tr:last-child {
  border-bottom: none;
}
.news-table td {
  padding: 0.5rem 0;
  vertical-align: top;
}
.news-date {
  width: 130px;
  min-width: 130px;
}

.news-list {
  list-style: none;
  padding: 0;
}
.news-item {
  border-bottom: 1px solid var(--af-border);
}
.news-item:last-child {
  border-bottom: none;
}

/* ---------- Project cards ---------- */
.project-card {
  border: 1px solid var(--af-border);
  border-radius: 0.5rem;
  overflow: hidden;
  background-color: var(--af-bg);
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s;
  display: flex;
  flex-direction: column;
  position: relative;
}

.project-card:hover {
  box-shadow: 0 6px 24px var(--af-shadow);
  transform: translateY(-3px);
  border-color: var(--af-accent);
}

.project-card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.project-card-icon {
  height: 120px;
  background: linear-gradient(135deg, var(--af-bg-secondary), var(--af-bg));
  border-bottom: 1px solid var(--af-border);
}

.project-card-body {
  padding: 1.1rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-card-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.project-card-title a {
  color: var(--af-text) !important;
}
.project-card-title a:hover {
  color: var(--af-accent) !important;
  text-decoration: none;
}

.project-card-text {
  font-size: 0.875rem;
  color: var(--af-muted);
  line-height: 1.55;
  margin-bottom: 0.5rem;
}

/* ---------- Skill badges ---------- */
.skill-badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  margin: 0.2rem 0.15rem;
  border: 1px solid var(--af-border);
  border-radius: 2rem;
  font-size: 0.8rem;
  color: var(--af-muted);
  background-color: var(--af-bg-secondary);
  transition: border-color 0.15s, color 0.15s;
}

.skill-badge:hover {
  border-color: var(--af-accent);
  color: var(--af-accent);
}

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0.35rem;
  top: 0.6rem;
  bottom: 0;
  width: 2px;
  background: var(--af-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 1.75rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.72rem;
  top: 0.45rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--af-accent);
  border: 2px solid var(--af-bg);
  box-shadow: 0 0 0 2px var(--af-border);
}

.timeline-date {
  display: block;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--af-muted);
}

/* ---------- Publications ---------- */
.publication-item {
  margin-bottom: 1.75rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--af-border);
}
.publication-item:last-child {
  border-bottom: none;
}
.publication-title {
  font-weight: 600;
  color: var(--af-text);
  font-size: 0.95rem;
}
.publication-venue {
  color: var(--af-accent);
  font-style: italic;
  font-size: 0.85rem;
}

/* ---------- Project detail ---------- */
.project-title {
  font-size: 1.75rem;
  font-weight: 700;
}
.project-content {
  font-size: 0.95rem;
  line-height: 1.75;
}

/* ---------- Footer ---------- */
.fixed-bottom-footer {
  border-top: 1px solid var(--af-border);
  background-color: var(--af-bg);
  transition: background-color 0.2s, border-color 0.2s;
}

/* ---------- Code ---------- */
code {
  font-size: 0.85em;
  color: #d63384;
  background: var(--af-bg-secondary);
  padding: 0.1em 0.35em;
  border-radius: 0.2rem;
}

pre code {
  color: inherit;
  background: none;
  padding: 0;
}

pre {
  background: var(--af-bg-secondary);
  border: 1px solid var(--af-border);
  border-radius: 0.4rem;
  padding: 1rem;
  overflow-x: auto;
}

/* ---------- Responsive tweaks ---------- */
@media (max-width: 767px) {
  .profile-col {
    margin-bottom: 1.5rem;
  }
}