/* ── Reset & Base ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:           #f5f4f0;
  --surface:      #ffffff;
  --border:       #dddbd5;
  --text:         #1e1c1a;
  --muted:        #6b6863;
  --accent:       #5c3fa3;
  --accent-hover: #4a3185;
  --max-width:    860px;
  --radius:       8px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Lora', Georgia, serif;
  font-size: 1rem;
  line-height: 1.75;
  font-weight: 400;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* ── Navigation ── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--accent);
  border-bottom: 1px solid var(--accent-hover);
}

nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 600;
  font-size: 1.1rem;
  color: #fff;
  font-style: italic;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
}

nav ul a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
  transition: color 0.2s;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

nav ul a:hover,
nav ul a.active {
  color: #fff;
  text-decoration: none;
  border-bottom-color: #fff;
}

/* ── Dropdown ── */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  min-width: 110px;
  list-style: none;
  padding: 6px 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s, visibility 0.15s;
  transition-delay: 0.15s;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}

.dropdown-menu a {
  display: block;
  padding: 8px 16px;
  color: var(--muted);
  font-size: 0.875rem;
  border-bottom: none !important;
  white-space: nowrap;
  transition: color 0.15s, background 0.15s;
}

.dropdown-menu a:hover {
  color: var(--accent);
  background: var(--bg);
  text-decoration: none;
}

/* ── Pages (tab switching) ── */
.page {
  display: none;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 72px 24px 80px;
}

.page.active {
  display: block;
}

/* ── Hero ── */
#hero.page {
  min-height: calc(100vh - 60px);
  display: none;
  flex-direction: column;
  justify-content: center;
  padding-top: 0;
  padding-bottom: 0;
}

#hero.page.active {
  display: flex;
}

#hero h1 {
  font-size: clamp(3rem, 8vw, 4.5rem);
  font-weight: 600;
  color: var(--text);
  line-height: 1.25;
  margin-bottom: 20px;
}

#hero .btn {
  padding: 14px 34px;
  font-size: 1.05rem;
}

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

.tagline {
  font-size: 1.35rem;
  color: var(--muted);
  margin-bottom: 40px;
  max-width: 560px;
}

/* ── Hero contact links ── */
.hero-contact {
  list-style: none;
  display: flex;
  gap: 28px;
  margin-top: 32px;
  padding: 0;
  flex-wrap: wrap;
}

.hero-contact a {
  font-size: 1.1rem;
  color: var(--muted);
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.hero-contact a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

/* ── Section headings ── */
h2 {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 32px;
  color: var(--text);
}

h2::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--accent);
  margin-top: 8px;
  border-radius: 2px;
}

/* ── Button ── */
.btn {
  display: inline-block;
  padding: 11px 26px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  font-family: 'Lora', Georgia, serif;
  font-weight: 500;
  font-size: 0.95rem;
  transition: background 0.2s;
  text-decoration: none;
}

.btn:hover {
  background: var(--accent-hover);
  color: #fff;
  text-decoration: none;
}

/* ── Section content ── */
.section-content {
  max-width: 760px;
  margin: 0 auto;
}

.section-content p {
  color: var(--muted);
  margin-bottom: 16px;
}

/* ── Project Cards ── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(92, 63, 163, 0.1);
}

.card h3 {
  font-size: 1rem;
  color: var(--text);
}

.card p {
  font-size: 0.9rem;
  color: var(--muted);
  flex: 1;
}

.card-links {
  display: flex;
  gap: 16px;
  font-size: 0.875rem;
  margin-top: 4px;
}

/* ── Button outline variant ── */
.btn-outline {
  display: inline-block;
  padding: 11px 26px;
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  font-family: 'Lora', Georgia, serif;
  font-weight: 500;
  font-size: 0.95rem;
  transition: background 0.2s, color 0.2s;
  text-decoration: none;
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
  text-decoration: none;
}

/* ── Resume PDF viewer ── */
.resume-pdf-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.resume-pdf-viewer {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.resume-pdf-viewer iframe {
  width: 100%;
  height: calc(100vh - 260px);
  min-height: 600px;
  display: block;
  border: none;
}

/* ── Resume (legacy, unused) ── */
.resume-block {
  margin-bottom: 40px;
}

.resume-block h3 {
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  color: var(--muted);
}

.resume-entry {
  margin-bottom: 20px;
}

.resume-entry-header {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 4px;
}

.resume-entry-header strong {
  color: var(--text);
}

.date {
  font-size: 0.85rem;
  color: var(--muted);
}

.resume-entry em {
  font-size: 0.9rem;
  color: var(--accent);
  font-style: normal;
}

.resume-entry ul {
  margin-top: 8px;
  padding-left: 20px;
  color: var(--muted);
  font-size: 0.9rem;
}

.resume-entry ul li {
  margin-bottom: 4px;
}

.skills-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin-bottom: 32px;
}

.skills-list li {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 12px;
  font-size: 0.85rem;
  color: var(--text);
}

/* ── About Me Photos ── */
.about-intro p {
  color: var(--muted);
  margin-bottom: 16px;
}

.photo-hint {
  font-size: 0.82rem;
  color: var(--muted);
  font-style: italic;
  margin-bottom: 12px;
}

.about-photo-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 4px 0 28px;
}

.about-photo-item {
  flex: 0 0 185px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 1;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.about-photo-item.wide {
  flex: 0 0 380px; /* two item widths + one gap */
  aspect-ratio: 16 / 9;
}

.about-photo-item:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(92, 63, 163, 0.1);
}

.about-photo-item img,
.about-photo-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Photo cluster (album covers, TTR group) */
.photo-cluster {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 16px 12px;
  margin: 28px auto;
  max-width: 100%;
}

.photo-cluster-label {
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: lowercase;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.photo-cluster .about-photo-grid {
  margin: 0;
}

/* Modal media wrapper + nav arrows */
.photo-modal-media {
  position: relative;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  padding: 0;
  font-family: inherit;
}

.modal-nav:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.modal-prev { left: 10px; }
.modal-next { right: 10px; }

/* Photo modal / lightbox */
.photo-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  z-index: 500;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.photo-modal-overlay.open {
  display: flex;
}

.photo-modal {
  background: var(--surface);
  border-radius: var(--radius);
  max-width: min(680px, 90vw);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}

.photo-modal-close-row {
  display: flex;
  justify-content: flex-end;
  padding: 8px 10px 0;
}

.photo-modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
  padding: 2px 8px;
  border-radius: 4px;
  transition: color 0.15s;
  font-family: inherit;
}

.photo-modal-close:hover {
  color: var(--text);
}

#photo-modal-img {
  width: 100%;
  max-height: 62vh;
  object-fit: contain;
  display: block;
  background: var(--bg);
}

#photo-modal-video {
  width: 100%;
  max-height: 62vh;
  background: var(--bg);
  display: none;
}

.photo-modal-caption {
  padding: 12px 20px 18px;
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.6;
}

/* Sub-page link banners ("get to know me better") */
.subpage-links-label {
  margin-top: 52px;
  margin-bottom: 16px;
  font-size: 0.9rem;
  color: var(--muted);
  font-style: italic;
}

.subpage-links {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.subpage-link-card {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.subpage-link-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(92, 63, 163, 0.08);
  text-decoration: none;
}

.subpage-link-img {
  width: 120px;
  height: 120px;
  flex-shrink: 0;
  overflow: hidden;
}

.subpage-link-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.subpage-link-text {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.subpage-link-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
}

.subpage-link-desc {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
}

/* ── Education page ── */
.edu-block {
  margin-bottom: 52px;
}

.edu-split {
  display: flex;
  gap: 36px;
  align-items: flex-start;
  margin-bottom: 28px;
}

.edu-split-flip {
  flex-direction: row-reverse;
}

.edu-split-img {
  flex: 0 0 300px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.edu-split-img img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.edu-split-text {
  flex: 1;
  min-width: 0;
}

.edu-tag {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 0.72rem;
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}

.edu-school {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 4px;
}

.edu-degree {
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 4px;
}

.edu-meta {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 14px;
}

.edu-split-text p {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 12px;
  line-height: 1.7;
}

.edu-bullets {
  padding-left: 18px;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

.edu-bullets li {
  margin-bottom: 3px;
}

.edu-research-slides {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.edu-research-slide img {
  width: 100%;
  display: block;
}

.edu-snapshots-label {
  font-size: 0.75rem;
  color: var(--muted);
  font-style: italic;
  margin-bottom: 10px;
}

.edu-snapshots {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.edu-snapshot {
  flex: 1;
  min-width: 130px;
  max-width: 190px;
}

.edu-snapshot img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
}

.edu-snapshot-label {
  font-size: 0.73rem;
  color: var(--muted);
  text-align: center;
  padding: 4px 6px 6px;
  font-style: italic;
}

.edu-photo-item {
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.edu-photo-item:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(92, 63, 163, 0.1);
}

.edu-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0 0 52px;
}

.edu-photo-row {
  display: flex;
  gap: 12px;
}

.edu-photo-row-item {
  flex: 1;
  min-width: 0;
}

.edu-photo-row-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.edu-photo-row-label {
  font-size: 0.73rem;
  color: var(--muted);
  text-align: center;
  padding: 4px 6px 6px;
  font-style: italic;
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
  background: var(--surface);
}

/* ── Responsive ── */
@media (max-width: 600px) {
  nav ul {
    gap: 16px;
  }

  .resume-entry-header {
    flex-direction: column;
  }

  .edu-split,
  .edu-split.edu-split-flip {
    flex-direction: column;
  }

  .edu-split-img {
    flex: none;
    width: 100%;
  }

  .edu-photo-row {
    flex-direction: column;
  }
}