/* ============================================
   BACKGROUND DECORATION
   ============================================ */
.page-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1200px;
  z-index: 0;
  pointer-events: none;
  
  background-image: url("../assets/skyline.png");
  background-repeat: no-repeat;
  background-position: center top;
  background-size: 1600px auto;
  
  opacity: 0.05;
  
  mask-image: linear-gradient(
    to bottom,
    rgba(0,0,0,1) 0%,
    rgba(0,0,0,1) 70%,
    rgba(0,0,0,0.3) 90%,
    rgba(0,0,0,0) 100%
  );
  -webkit-mask-image: linear-gradient(
    to bottom,
    rgba(0,0,0,1) 0%,
    rgba(0,0,0,1) 70%,
    rgba(0,0,0,0.3) 90%,
    rgba(0,0,0,0) 100%
  );
}

.theme-dark .page-bg {
  filter: invert(1) grayscale(1);
}

@media (max-width: 768px) {
  .page-bg {
    height: 800px;
    background-size: 1000px auto;
    opacity: 0.06;
  }
}

.page {
  position: relative;
  z-index: 1;
}


/* ============================================
   HEADER
   ============================================ */
.header {
  margin-bottom: var(--space-2xl);
  position: relative;
}

.theme-toggle {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 10;
  
  background: none;
  border: 1px solid var(--surface-border);
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--fg);
  
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--surface);
  border-color: var(--muted);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.header-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.header-image {
  position: relative;
}

.header-image img {
  width: 100%;
  height: auto;
  min-height: 280px;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

.header-image img:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.16);
}

.theme-dark .header-image img:hover {
  box-shadow: 0 12px 32px rgba(0,0,0,0.6);
}

.header-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.tagline {
  font-weight: 500;
  font-size: 1.05rem;
  color: var(--muted);
}

.summary {
  color: var(--muted);
  max-width: 640px;
  line-height: 1.7;
}

.links {
  display: flex;
  gap: var(--space-lg);
  margin-top: var(--space-sm);
}

.links a {
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
}

.links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-base);
}

.links a:hover::after {
  width: 100%;
}

@media (max-width: 768px) {
  .header-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .header-image img {
    min-height: 200px;
  }
  
  .theme-toggle {
    top: -0.5rem;
    right: -0.5rem;
  }
}


/* ============================================
   CARD SYSTEM (Base)
   ============================================ */
.card {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-lg);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  margin-bottom: var(--space-xl);
  
  transition: background var(--transition-base), border-color var(--transition-base), 
              transform var(--transition-base);
}

.card:hover {
  background: var(--surface-hover);
  border-color: rgba(0, 0, 0, 0.12);
}

.theme-dark .card:hover {
  border-color: rgba(255, 255, 255, 0.18);
}

/* Card Media - Research Cards (default) */
.card-media {
  width: 140px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.card-media a {
  display: block;
  width: 100%;
  cursor: zoom-in;
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
  
  transition: transform var(--transition-base);
}

.card-media a:hover {
  transform: scale(1.02);
}

/* Research Card Images - Fill container completely */
.research-card .card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.research-card .card-media img.rotate-90 {
  position: absolute;
  top: 50%;
  left: 50%;
  width: auto;
  height: 140px;
  min-width: 140px;
  transform: translate(-50%, -50%) rotate(90deg);
  transform-origin: center center;
}

/* Research Card - Collapsed state: first image fills entire height */
.research-card .card-media:not(.expanded) a {
  height: 100%;
}

.research-card .card-media:not(.expanded) a:not(:first-child) {
  display: none;
}

/* Research Card - Expanded state: all images share space equally */
.research-card .card-media.expanded {
  gap: var(--space-sm);
}

.research-card .card-media.expanded a {
  flex: 1;
  height: auto;
  min-height: 100px;
}

/* Card Content */
.card-content {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.card-content h3 {
  margin-top: 0;
}

.subtitle {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: var(--space-sm);
}

.card-description {
  position: relative;
  /* margin-bottom: var(--space-md); */
}

.card-description p {
  margin: 0;
  line-height: 1.65;
  
  display: -webkit-box;
  line-clamp: 5;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-description.expanded p {
  display: block;
  line-clamp: unset;
  -webkit-line-clamp: unset;
}

/* Expand Button */
.expand-btn {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
  
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  
  font-size: 0.85rem;
  font-family: inherit;
  font-weight: 500;
  
  align-self: flex-end;
  margin-bottom: var(--space-sm);
  
  transition: color var(--transition-fast);
}

.expand-btn:hover {
  color: var(--fg);
}

.expand-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.expand-text {
  line-height: 1;
}

.expand-btn svg {
  transition: transform var(--transition-base);
  flex-shrink: 0;
  display: block;
}

.expand-btn.expanded svg {
  transform: rotate(180deg);
}

/* Card Links */
.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: auto;
}

.card-links a {
  font-size: 0.9rem;
  font-weight: 500;
}

@media (max-width: 600px) {
  .card {
    grid-template-columns: 1fr;
  }
  
  .card-media {
    width: 100%;
  }
  
  .card-media a {
    max-height: 200px;
  }
}


/* ============================================
   CARD VARIANTS
   ============================================ */

/* Research Card - Default styling already defined above */

/* Industry/Applied Card */
.industry-card {
  grid-template-columns: 180px 1fr;
}

.industry-card .card-media {
  width: 180px;
  margin-top: 1.5rem;
}

/* Industry Card Images - Maintain aspect ratio */
.industry-media a {
  height: auto;
}

.industry-media img {
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: center;
  display: block;
}

/* Industry Card - Collapsed state: first image at natural size */
.industry-media:not(.expanded) {
  justify-content: flex-start;
}

.industry-media:not(.expanded) a:not(:first-child) {
  display: none;
}

/* Industry Card - Expanded state: all images stacked, centered vertically */
.industry-media.expanded {
  gap: var(--space-sm);
  justify-content: flex-start;
}

.industry-media.expanded a {
  height: auto;
}

@media (max-width: 600px) {
  .industry-card {
    grid-template-columns: 1fr;
  }
  
  .industry-card .card-media {
    width: 100%;
  }
}

/* Card with background overlay */
.with-bg {
  position: relative;
  padding: var(--space-lg);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.with-bg .bg-overlay {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.04;
  z-index: 0;
}

.theme-dark .with-bg .bg-overlay {
  opacity: 0.06;
}

.with-bg > * {
  position: relative;
  z-index: 1;
}

/* Tech List (used in industry cards) */
.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin: var(--space-md) 0;
  padding: 0;
  list-style: none;
}

.tech-list li {
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.05);
  color: var(--muted);
  
  transition: background var(--transition-fast);
}

.theme-dark .tech-list li {
  background: rgba(255, 255, 255, 0.08);
}

.tech-list li:hover {
  background: rgba(0, 0, 0, 0.08);
}

.theme-dark .tech-list li:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* Talk Card */
.talk-card {
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-xl);
}

.talk-meta h3 {
  margin-bottom: var(--space-xs);
}

.talk-meta .location {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0.2rem 0;
}

.talk-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.talk-links a {
  font-size: 0.9rem;
  white-space: nowrap;
}

@media (max-width: 600px) {
  .talk-card {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  
  .talk-links {
    flex-direction: row;
  }
}


/* ============================================
   HONORS & DISTINCTIONS
   ============================================ */
.honors-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.honor-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-xl);
  
  padding: var(--space-lg) var(--space-xl);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  
  transition: background var(--transition-base), border-color var(--transition-base),
              transform var(--transition-base);
}

.honor-item:hover {
  background: var(--surface-hover);
  transform: translateX(4px);
}

.honor-content {
  flex: 1;
  min-width: 0;
}

.honor-content p {
  margin: 0;
  line-height: 1.6;
}

.honor-year {
  flex-shrink: 0;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--accent);
  padding-top: 0.1rem;
}

@media (max-width: 600px) {
  .honor-item {
    flex-direction: column;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
  }
  
  .honor-year {
    align-self: flex-end;
    font-size: 0.85rem;
  }
}


/* ============================================
   CONTACT FORM
   ============================================ */
.section-bleed {
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  width: 100vw;
  
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.015),
    rgba(0, 0, 0, 0.025)
  );
}

.theme-dark .section-bleed {
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.02),
    rgba(255, 255, 255, 0.035)
  );
}

.section-bleed > section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

.contact-form {
  max-width: 100%;
}

.contact-form label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: var(--space-md);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  margin-top: 0.35rem;
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form.show-errors input:invalid,
.contact-form.show-errors textarea:invalid {
  border-color: rgba(220, 38, 38, 0.5);
}

.contact-form.show-errors input:focus:invalid,
.contact-form.show-errors textarea:focus:invalid {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.form-row label {
  margin-bottom: 0;
}

.contact-form button {
  margin-top: var(--space-sm);
  margin-bottom: var(--space-xl);
  padding: 0.7rem 1.6rem;
  border-radius: 999px;
  border: none;
  
  background: var(--accent);
  color: #fff;
  
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.contact-form button:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.contact-form button:active {
  transform: translateY(0);
}

.contact-form button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.form-status {
  font-size: 0.9rem;
  font-family: var(--font-body);
  color: var(--muted);
  margin: var(--space-xs) 0 var(--space-sm);
}

.form-status.success {
  color: #16a34a;
}

.form-status.error {
  color: #dc2626;
}

/* Honeypot field */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}


/* ============================================
   FOOTER
   ============================================ */
.footer {
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--surface-border);
  text-align: center;
}

.footer p {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0;
}


/* ============================================
   MINI-MAP NAVIGATION
   ============================================ */
.mini-map {
  position: fixed;
  left: 2rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mini-map-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  padding: 0.4rem 0;
  transition: all var(--transition-base);
}

.mini-map-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--surface-border);
  border: 1px solid var(--surface-border);
  transition: all var(--transition-base);
}

.mini-map-item.active .mini-map-dot {
  width: 10px;
  height: 10px;
  background: var(--muted);
  border-color: var(--muted);
  box-shadow: 0 0 8px rgba(37, 99, 235, 0.4);
}

.mini-map-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--muted);
  opacity: 0.2;
  pointer-events: none;
  white-space: nowrap;
  transition: opacity var(--transition-base);
}

.mini-map-item:hover .mini-map-label,
.mini-map-item.active .mini-map-label {
  opacity: 1;
}

.mini-map-item.active .mini-map-label {
  color: var(--muted);
}

.mini-map-item:hover .mini-map-dot {
  background: var(--muted);
  border-color: var(--muted);
  transform: scale(1.2);
}

/* Hide mini-map on tablets and mobile */
@media (max-width: 1024px) {
  .mini-map {
    display: none;
  }
}