/* ==========================================================================
   display cards site — dark minimal, space mono
   ========================================================================== */

:root {
  --bg: #09090b;
  --card-bg: rgba(24, 24, 27, 0.7);
  --card-bg-solid: rgba(24, 24, 27, 1);
  --border: rgba(63, 63, 70, 0.5);
  --border-hover: rgba(255, 255, 255, 0.2);
  --text: #fafafa;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;
  --accent: #60a5fa;
  --accent-bg: #1e3a8a;
  --radius: 0.75rem;
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: "Space Mono", monospace;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  text-transform: lowercase;
  line-height: 1.6;
  overflow-x: hidden;
  animation: pageIn 400ms ease-out;
}

@keyframes pageIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

body.page-exit {
  animation: pageOut 250ms ease-in forwards;
}

@keyframes pageOut {
  to { opacity: 0; transform: translateY(-6px); }
}

/* dotted surface background — main page only */
.dotted-surface {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.dotted-surface canvas {
  display: block;
  width: 100%;
  height: 100%;
}

main {
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   hero (homepage)
   ========================================================================== */

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 6rem 1.5rem 2rem;
}

.headshot {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  border: 2px solid var(--border);
  overflow: hidden;
  margin-bottom: 1.5rem;
  background: rgba(24, 24, 27, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.headshot-initials {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  user-select: none;
}

h1 {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.tagline {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-dim);
}

/* ==========================================================================
   display cards — stacking layout from cards.md
   z-index hierarchy is FIXED: cards never change layer on hover
   ========================================================================== */

.cards-section {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2rem 2rem 6rem;
  min-height: 360px;
}

.cards-stack {
  display: grid;
  grid-template-areas: "stack";
  place-items: center;
  transform: translateX(-5.25rem) translateY(-1.5rem);
  animation: stackIn 700ms ease-out;
}

@keyframes stackIn {
  from {
    opacity: 0;
    transform: translateX(-5.25rem) translateY(1rem);
  }
  to {
    opacity: 1;
    transform: translateX(-5.25rem) translateY(-1.5rem);
  }
}

.display-card {
  grid-area: stack;
  position: relative;
  display: flex;
  height: 9rem;
  width: 22rem;
  user-select: none;
  flex-direction: column;
  justify-content: space-between;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--card-bg);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  padding: 1rem 1.25rem;
  transition: all 700ms;
  cursor: pointer;
  outline: none;
  text-decoration: none;
  color: inherit;
}

/* gradient fade on right edge */
.display-card::after {
  content: "";
  position: absolute;
  right: -1px;
  top: -5%;
  height: 110%;
  width: 20rem;
  background: linear-gradient(to left, var(--bg), transparent);
  pointer-events: none;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.display-card:hover,
.display-card:focus-visible {
  border-color: var(--border-hover);
  background: var(--card-bg-solid);
}

.display-card:focus-visible {
  box-shadow: 0 0 0 2px var(--accent);
}

/* --- card positions — z-index is PERMANENT, never changes on hover --- */

.display-card:nth-child(1) {
  z-index: 1;
  transform: skewY(-8deg);
}
.display-card:nth-child(2) {
  z-index: 2;
  transform: translateX(3.5rem) translateY(2.5rem) skewY(-8deg);
}
.display-card:nth-child(3) {
  z-index: 3;
  transform: translateX(7rem) translateY(5rem) skewY(-8deg);
}
.display-card:nth-child(4) {
  z-index: 4;
  transform: translateX(10.5rem) translateY(7.5rem) skewY(-8deg);
}

/* --- grayscale + overlay on all cards --- */

.display-card:nth-child(1),
.display-card:nth-child(2),
.display-card:nth-child(3),
.display-card:nth-child(4) {
  filter: grayscale(100%);
}

.display-card:nth-child(1)::before,
.display-card:nth-child(2)::before,
.display-card:nth-child(3)::before,
.display-card:nth-child(4)::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  outline: 1px solid var(--border);
  background: rgba(9, 9, 11, 0.5);
  background-blend-mode: overlay;
  transition: opacity 700ms;
  pointer-events: none;
  z-index: 1;
}

/* --- hover lift — z-index stays constant, cards never phase through --- */

.display-card:nth-child(1):hover,
.display-card:nth-child(1):focus-visible {
  transform: translateY(-2.5rem) skewY(-8deg);
  filter: grayscale(0);
}
.display-card:nth-child(1):hover::before,
.display-card:nth-child(1):focus-visible::before {
  opacity: 0;
}

.display-card:nth-child(2):hover,
.display-card:nth-child(2):focus-visible {
  transform: translateX(3.5rem) translateY(0) skewY(-8deg);
  filter: grayscale(0);
}
.display-card:nth-child(2):hover::before,
.display-card:nth-child(2):focus-visible::before {
  opacity: 0;
}

.display-card:nth-child(3):hover,
.display-card:nth-child(3):focus-visible {
  transform: translateX(7rem) translateY(2.5rem) skewY(-8deg);
  filter: grayscale(0);
}
.display-card:nth-child(3):hover::before,
.display-card:nth-child(3):focus-visible::before {
  opacity: 0;
}

.display-card:nth-child(4):hover,
.display-card:nth-child(4):focus-visible {
  transform: translateX(10.5rem) translateY(5rem) skewY(-8deg);
  filter: grayscale(0);
}
.display-card:nth-child(4):hover::before,
.display-card:nth-child(4):focus-visible::before {
  opacity: 0;
}

/* --- card inner elements --- */

.dc-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  position: relative;
  z-index: 2;
}

.dc-date {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-muted);
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   footer links (homepage)
   ========================================================================== */

.footer-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem 3rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 400;
  transition: color 250ms;
}

.footer-links a:hover {
  color: var(--accent);
}

.dot {
  color: var(--text-dim);
  opacity: 0.4;
  user-select: none;
}

/* ==========================================================================
   section pages — nav, title, entries
   ========================================================================== */

.section-nav {
  padding: 2rem 2.5rem;
}

.nav-name {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: -0.01em;
  transition: color 250ms;
}

.nav-name:hover {
  color: var(--accent);
}

.section-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem 2rem 6rem;
}

.page-title {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 3.5rem;
  color: var(--text);
  line-height: 1.1;
}

/* --- entries --- */

.entries {
  display: flex;
  flex-direction: column;
}

.entries-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.entries-label:first-child {
  margin-top: 0;
}

.entry {
  padding: 1.75rem 0;
  border-bottom: 1px solid rgba(63, 63, 70, 0.25);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.entry.visible {
  opacity: 1;
  transform: translateY(0);
}

.entry-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.35rem;
}

.entry h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}

.entry-date {
  font-size: 0.7rem;
  color: var(--text-dim);
  white-space: nowrap;
  flex-shrink: 0;
}

.entry-org {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.entry-desc {
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.entry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.entry-tags span {
  padding: 0.15rem 0.5rem;
  font-size: 0.65rem;
  font-weight: 400;
  border: 1px solid var(--border);
  border-radius: 0.2rem;
  color: var(--text-dim);
}

.entry-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.75rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
  transition: opacity 200ms;
}

.entry-link:hover {
  opacity: 0.7;
}

.entry-compact {
  padding: 1rem 0;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(63, 63, 70, 0.25);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.entry-compact.visible {
  opacity: 1;
  transform: translateY(0);
}

a.entry-compact {
  text-decoration: none;
  color: inherit;
  transition: opacity 600ms ease, transform 600ms ease, border-color 200ms;
}

a.entry-compact:hover {
  border-color: rgba(63, 63, 70, 0.6);
}

.entry-compact .media-badge {
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}

/* interest tags row at bottom of research page */
.interests-section {
  margin-top: 3rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.interests-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.interests-section .entries-label {
  margin-top: 0;
}

.interests-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.interests-row span {
  padding: 0.2rem 0.6rem;
  font-size: 0.7rem;
  border: 1px solid var(--border);
  border-radius: 0.2rem;
  color: var(--text-dim);
}

/* ==========================================================================
   responsive
   ========================================================================== */

@media (max-width: 768px) {
  .hero {
    padding: 4rem 1.25rem 1.5rem;
  }

  .cards-section {
    padding: 1.5rem 10vw 4rem;
    min-height: auto;
  }

  /* dynamic stacked cards — 80% viewport width, 10% margin each side */
  .cards-stack {
    width: 80vw;
    transform: translateX(-8vw) translateY(-1.5vw);
  }

  .display-card {
    height: 5.5rem;
    width: 58vw;
    padding: 0.5rem 0.75rem;
  }

  .display-card::after {
    width: 45vw;
  }

  .display-card:nth-child(1) {
    transform: skewY(-8deg);
  }
  .display-card:nth-child(2) {
    transform: translateX(7vw) translateY(6vw) skewY(-8deg);
  }
  .display-card:nth-child(3) {
    transform: translateX(14vw) translateY(12vw) skewY(-8deg);
  }
  .display-card:nth-child(4) {
    transform: translateX(21vw) translateY(18vw) skewY(-8deg);
  }

  .display-card:nth-child(1):hover,
  .display-card:nth-child(1):focus-visible {
    transform: translateY(-3vw) skewY(-8deg);
  }
  .display-card:nth-child(2):hover,
  .display-card:nth-child(2):focus-visible {
    transform: translateX(7vw) translateY(0) skewY(-8deg);
  }
  .display-card:nth-child(3):hover,
  .display-card:nth-child(3):focus-visible {
    transform: translateX(14vw) translateY(6vw) skewY(-8deg);
  }
  .display-card:nth-child(4):hover,
  .display-card:nth-child(4):focus-visible {
    transform: translateX(21vw) translateY(12vw) skewY(-8deg);
  }

  .dc-title {
    font-size: clamp(0.7rem, 2.2vw, 0.9rem);
  }

  .dc-date {
    font-size: clamp(0.5rem, 1.5vw, 0.65rem);
  }

  .section-nav {
    padding: 1.5rem 1.25rem;
  }

  .section-content {
    padding: 1rem 1.25rem 4rem;
  }

  .entry-header {
    flex-direction: column;
    gap: 0.25rem;
  }

  .entry-date {
    order: -1;
  }

  .footer-links {
    padding-top: 2.5rem;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.5rem;
  }

  .tagline {
    font-size: 0.8rem;
  }

  .headshot {
    width: 90px;
    height: 90px;
  }

  .headshot-initials {
    font-size: 2rem;
  }

  .footer-links {
    gap: 0.5rem;
  }

  .footer-links a {
    font-size: 0.75rem;
  }

  .page-title {
    font-size: 2.5rem;
  }

}

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  body {
    animation: none;
  }

  body.page-exit {
    animation: none;
  }

  .cards-stack {
    animation: none;
  }

  .display-card,
  .footer-links a {
    transition: none;
  }

  .entry,
  .entry-compact,
  .interests-section {
    opacity: 1;
    transform: none;
    transition: none;
  }
}