/* Site Layout */

.site-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 200px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 2rem 0;
  gap: 2rem;
  border-right: 1px solid var(--color-border);
}

.sidebar-photo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.sidebar-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sidebar-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sidebar-link {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-dim);
  transition: color var(--transition);
}

.sidebar-link:hover,
.sidebar-link.active {
  color: var(--color-accent);
}

/* Main Content */

.main-content {
  margin-left: 200px;
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  min-height: 100vh;
  padding: 4rem;
}

/* Landing Page */

.landing {
  display: flex;
  align-items: flex-start;
  gap: 4rem;
  max-width: 900px;
  width: 100%;
  padding-top: 2rem;
}

.landing-text {
  flex: 1;
}

.landing-name {
  font-size: var(--font-size-3xl);
  font-weight: 300;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.landing-tagline {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.landing-tagline p {
  margin-bottom: 1rem;
}

.landing-tagline p:last-child {
  margin-bottom: 0;
}

.landing-tagline a {
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.landing-tagline a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* Page Content (for sub-pages) */

.page-content {
  max-width: 640px;
  width: 100%;
}

.page-title {
  font-size: var(--font-size-xl);
  font-weight: 300;
  letter-spacing: -0.01em;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

/* Papers Page */

.papers-page .page-title {
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
}

.papers-page {
  max-width: 720px;
}

.main-content:has(.papers-page) {
  align-items: flex-start;
  padding-top: 2.5rem;
  padding-bottom: 2rem;
}

.papers-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.paper {
  padding: 0.4rem 0;
}

.paper-title {
  font-size: var(--font-size-sm);
  font-weight: 400;
}

.paper-title a {
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.paper-title a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.paper-meta {
  font-size: 0.65rem;
  color: var(--color-text-dim);
  margin-top: 0.1rem;
}

.paper-cites {
  color: var(--color-text-muted);
}

.pdf-link {
  font-size: 0.6rem;
  color: var(--color-text-dim);
  border-bottom: none !important;
  text-transform: lowercase;
  letter-spacing: 0.05em;
}

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

.paper-desc {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  margin-top: 0.15rem;
}

.papers-section-title {
  font-size: var(--font-size-sm);
  font-weight: 300;
  color: var(--color-text-dim);
  margin-top: 1.2rem;
  margin-bottom: 0.6rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--color-border);
}

/* Coding Page */

.coding-page {
  max-width: 720px;
}

.coding-page .page-title {
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
}

.main-content:has(.coding-page) {
  align-items: flex-start;
  padding-top: 2.5rem;
  padding-bottom: 2rem;
}

.coding-section-title {
  font-size: var(--font-size-sm);
  font-weight: 300;
  color: var(--color-text-dim);
  margin-top: 1.2rem;
  margin-bottom: 0.6rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--color-border);
}

.coding-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.coding-item {
  padding: 0.4rem 0;
}

.coding-item-title {
  font-size: var(--font-size-sm);
  font-weight: 400;
}

.coding-item-title a {
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.coding-item-title a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.coding-item-meta {
  font-size: 0.65rem;
  color: var(--color-text-dim);
  margin-top: 0.1rem;
}

.coding-cites {
  color: var(--color-text-muted);
}

.coding-item-desc {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  margin-top: 0.15rem;
}

/* Talks Page */

.talks-page {
  max-width: 720px;
}

.talks-page .page-title {
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
}

.main-content:has(.talks-page) {
  align-items: flex-start;
  padding-top: 2.5rem;
  padding-bottom: 2rem;
}

.talks-section-title {
  font-size: var(--font-size-sm);
  font-weight: 300;
  color: var(--color-text-dim);
  margin-top: 1.2rem;
  margin-bottom: 0.6rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--color-border);
}

.talks-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}

.talk-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.talk-title {
  font-size: var(--font-size-sm);
  font-weight: 400;
}

.talk-video {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  background: var(--color-bg);
}

.talk-video iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 1px solid var(--color-border);
  border-radius: 2px;
}

.talk-video-link {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: 2px;
}

.talk-video-link a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  color: var(--color-text-dim);
  transition: color var(--transition);
}

.talk-video-link a:hover {
  color: var(--color-accent);
}

.talk-video-link .play-icon {
  font-size: 1.5rem;
}

.talk-video-link .play-label {
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.talks-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.talk-item {
  padding: 0.3rem 0;
}

.talk-item-title {
  font-size: var(--font-size-sm);
  font-weight: 400;
}

.talk-item-desc {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  margin-top: 0.1rem;
}

/* PDF viewer overlay */

.pdf-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.85);
  z-index: 200;
  align-items: center;
  justify-content: center;
}

.pdf-overlay.active {
  display: flex;
}

.pdf-overlay iframe {
  width: 70%;
  height: 85%;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.pdf-close {
  position: fixed;
  top: 1rem;
  right: 1.5rem;
  font-size: 1.5rem;
  color: var(--color-text-muted);
  cursor: pointer;
  z-index: 201;
  background: none;
  border: none;
  font-family: var(--font-sans);
}

.pdf-close:hover {
  color: var(--color-accent);
}

/* Radio Page */

.radio-page {
  max-width: 720px;
}

.radio-page .page-title {
  margin-bottom: 0.4rem;
  padding-bottom: 0.5rem;
}

.main-content:has(.radio-page) {
  align-items: flex-start;
  padding-top: 2.5rem;
  padding-bottom: 2rem;
}

.radio-intro {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.radio-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
}

.radio-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.radio-video {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  background: var(--color-bg);
}

.radio-video iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 1px solid var(--color-border);
  border-radius: 2px;
}

.radio-info {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}

.radio-episode {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-dim);
}

/* Responsive */

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    bottom: 0;
    top: auto;
    left: 0;
    width: 100%;
    height: auto;
    padding: 0.75rem 2rem;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    border-right: none;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
    z-index: 100;
  }

  .sidebar-photo {
    width: 36px;
    height: 36px;
  }

  .sidebar-nav {
    flex-direction: row;
    gap: 2rem;
  }

  .main-content {
    margin-left: 0;
    padding: 3rem 2rem 5rem;
  }

  .landing {
    flex-direction: column;
    gap: 2rem;
    text-align: center;
  }

  .talks-grid,
  .radio-gallery {
    grid-template-columns: 1fr;
  }
}