:root {
  --bg: #070b14;
  --bg-gradient: radial-gradient(circle at 18% 12%, rgba(90, 178, 255, 0.24), transparent 42%),
    radial-gradient(circle at 80% 86%, rgba(255, 166, 64, 0.2), transparent 42%);
  --surface: rgba(9, 14, 26, 0.82);
  --surface-border: rgba(157, 188, 238, 0.26);
  --text: #eef5ff;
  --muted: #acc2dd;
  --canvas-bg: rgba(6, 10, 20, 0.92);
  --flow-dot: rgba(186, 214, 255, 0.22);
  --canvas-border: rgba(103, 156, 236, 0.32);
  --canvas-shadow: rgba(0, 0, 0, 0.65);
  --modal-shadow: rgba(3, 7, 16, 0.8);
  --ctrl-bg-a: rgba(18, 29, 45, 0.78);
  --ctrl-bg-b: rgba(11, 20, 33, 0.7);
  --ctrl-border: rgba(151, 188, 229, 0.33);
  --ctrl-edge: rgba(6, 12, 22, 0.42);
  --ctrl-shadow: rgba(1, 5, 14, 0.34);
  --ctrl-glow: rgba(130, 196, 255, 0.16);
  --ctrl-highlight: rgba(234, 246, 255, 0.3);
  --ctrl-text: #eaf5ff;
}

body[data-theme="light"] {
  --bg: #eff5ff;
  --bg-gradient: radial-gradient(circle at 22% 18%, rgba(98, 157, 255, 0.25), transparent 44%),
    radial-gradient(circle at 76% 82%, rgba(255, 183, 112, 0.22), transparent 48%);
  --surface: rgba(255, 255, 255, 0.85);
  --surface-border: rgba(75, 116, 185, 0.24);
  --text: #111f39;
  --muted: #375072;
  --canvas-bg: rgba(252, 254, 255, 0.95);
  --flow-dot: rgba(34, 73, 140, 0.2);
  --canvas-border: rgba(81, 124, 194, 0.33);
  --canvas-shadow: rgba(64, 84, 115, 0.35);
  --modal-shadow: rgba(73, 103, 147, 0.4);
  --ctrl-bg-a: rgba(255, 255, 255, 0.74);
  --ctrl-bg-b: rgba(230, 241, 255, 0.66);
  --ctrl-border: rgba(90, 126, 184, 0.31);
  --ctrl-edge: rgba(255, 255, 255, 0.48);
  --ctrl-shadow: rgba(78, 111, 156, 0.22);
  --ctrl-glow: rgba(120, 169, 238, 0.14);
  --ctrl-highlight: rgba(255, 255, 255, 0.85);
  --ctrl-text: #16355c;
}

* {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
  overflow-y: hidden;
}

html.needs-page-scroll {
  overflow-y: auto;
}

body {
  margin: 0;
  min-height: 100dvh;
  height: auto;
  font-family: "Sora", sans-serif;
  color: var(--text);
  background-color: var(--bg);
  background-image: var(--bg-gradient);
  background-size: 100% 100%;
  overflow: visible;
  overflow-x: hidden;
}

body.has-lab-cards {
  min-height: 100dvh;
  height: auto;
  overflow-y: visible;
  overflow-x: hidden;
}

.topbar {
  width: min(1240px, calc(100% - 3rem));
  margin: 0.85rem auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.03em;
  font-size: 1rem;
}

.top-controls {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.language-picker {
  position: relative;
}

.icon-btn {
  --btn-a: var(--ctrl-bg-a);
  --btn-b: var(--ctrl-bg-b);
  --btn-glow: var(--ctrl-glow);
  border: 1px solid var(--ctrl-border);
  background: linear-gradient(160deg, var(--btn-a) 0%, var(--btn-b) 100%);
  color: var(--ctrl-text);
  border-radius: 12px;
  width: 2.58rem;
  height: 2.28rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  box-shadow:
    0 7px 14px var(--ctrl-shadow),
    0 0 0 1px var(--ctrl-edge),
    inset 0 1px 0 var(--ctrl-highlight),
    inset 0 -1px 0 rgba(210, 233, 255, 0.08);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  transform: translateY(0);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.icon-btn::before {
  content: "";
  position: absolute;
  inset: 1px 1px auto;
  height: 42%;
  border-radius: 11px 11px 8px 8px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0));
  pointer-events: none;
}

.icon-btn::after {
  content: "";
  position: absolute;
  inset: auto -20% -34% -20%;
  height: 66%;
  background: radial-gradient(circle at 50% 0%, var(--btn-glow), transparent 72%);
  opacity: 0.25;
  pointer-events: none;
}

.icon-btn > * {
  position: relative;
  z-index: 1;
}

.icon-btn:hover {
  border-color: rgba(176, 218, 255, 0.74);
  transform: translateY(-1px);
  box-shadow:
    0 9px 16px var(--ctrl-shadow),
    0 0 0 1px var(--ctrl-edge),
    0 0 10px var(--btn-glow),
    inset 0 1px 0 var(--ctrl-highlight),
    inset 0 -1px 0 rgba(210, 233, 255, 0.1);
}

.icon-btn:active {
  transform: translateY(0);
}

.icon-btn:focus-visible {
  outline: 2px solid rgba(151, 206, 255, 0.84);
  outline-offset: 2px;
}

.icon-btn > svg,
.icon-btn > img {
  display: block;
  filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.22));
}

.flag-slot {
  width: 1.5rem;
  height: 1rem;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.22);
}

.flag-slot img,
.flag-slot svg {
  width: 100%;
  height: 100%;
  display: block;
}

.language-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  min-width: 132px;
  border: 1px solid var(--ctrl-border);
  background: rgba(12, 21, 35, 0.84);
  border-radius: 14px;
  padding: 0.36rem;
  display: grid;
  gap: 0.24rem;
  box-shadow:
    0 16px 28px rgba(5, 11, 22, 0.3),
    inset 0 1px 0 rgba(228, 245, 255, 0.14);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 12;
}

body[data-theme="light"] .language-menu {
  background: rgba(245, 251, 255, 0.9);
  box-shadow:
    0 16px 28px rgba(64, 97, 138, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.84);
}

.language-menu.hidden {
  display: none;
}

.language-option {
  border: 0;
  background: transparent;
  color: var(--text);
  width: 100%;
  border-radius: 8px;
  padding: 0.33rem 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.42rem;
  cursor: pointer;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.language-option:hover,
.language-option.active {
  background: rgba(109, 174, 255, 0.18);
}

.flag-svg {
  width: 1.35rem;
  height: 0.95rem;
  border-radius: 3px;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.14);
  display: block;
}

.theme-icon-static {
  display: block;
  width: 18px;
  height: 18px;
}

.about-icon {
  width: 18px;
  height: 18px;
}

.layout {
  width: min(1240px, calc(100% - 3rem));
  margin: 0.75rem auto 1rem;
  display: block;
}

.lab-section {
  margin-top: 1.1rem;
  padding: 0.9rem 0 0.4rem;
}

.lab-section.hidden {
  display: none;
}

.lab-section.lab-pending {
  opacity: 0;
  transform: translateY(56px) scale(0.97);
  filter: blur(2px);
  pointer-events: none;
}

.lab-section.lab-revealed {
  animation: labReveal 760ms cubic-bezier(0.16, 0.86, 0.22, 1.06) both;
}

.lab-head {
  margin-bottom: 0.72rem;
}

.lab-kicker {
  margin: 0 0 0.24rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.lab-title {
  margin: 0;
  font-size: clamp(1rem, 1.8vw, 1.26rem);
}

.lab-sub {
  margin: 0.32rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.lab-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.78rem;
}

.lab-card {
  border-radius: 14px;
  border: 1px solid var(--surface-border);
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.015));
  padding: 0.86rem 0.9rem 0.92rem;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.24);
}

body[data-theme="light"] .lab-card {
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.9), rgba(242, 248, 255, 0.82));
}

.lab-card h4 {
  margin: 0 0 0.2rem;
  font-size: 0.98rem;
}

.lab-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.42;
  font-size: 0.84rem;
}

.lab-meta {
  margin-top: 0.64rem;
  display: grid;
  gap: 0.35rem;
}

.lab-meta-row {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
}

.lab-meta-row .value {
  color: var(--text);
}

.lab-card-link {
  margin-top: 0.7rem;
  display: inline-block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in oklab, var(--text), transparent 55%);
}

.lab-card-link:hover {
  opacity: 0.86;
}

/* Hero / info bar above the diagram */
.hero-info {
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0.65rem 1rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border: 1px solid rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.43);
  backdrop-filter: blur(6px);
  border-radius: 12px;
}

.hero-kicker {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 0.18rem;
}

.hero-title {
  margin: 0;
  font-size: clamp(1rem, 1.7vw, 1.25rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--text);
}

.hero-sub {
  margin: 0.28rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
  opacity: 0.9;
}

@media (max-width: 640px) {
  .hero-info { padding: 0.5rem 0.6rem; margin: 0.5rem auto 0.6rem; }
  .hero-title { font-size: 1rem; }
  .hero-sub { font-size: 0.8rem; }
}

/* Dark-mode: keep hero block visually consistent with other surfaces */
body[data-theme="dark"] .hero-info {
  background: var(--surface);
  border: 1px solid var(--surface-border);
}

#canvas-container {
  position: relative;
  perspective: 2400px;
  perspective-origin: center top;
  border-radius: 0;
  padding: 0;
  background: transparent;
  border: 0;
  min-height: 0;
}

.camera-caption {
  position: absolute;
  top: 0.65rem;
  left: 1.2rem;
  z-index: 2;
  pointer-events: none;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  color: var(--muted);
  animation: captionFade 10s ease forwards;
}

#flow {
  aspect-ratio: 1360 / 840;
  width: min(100%, calc((100dvh - 220px) * 1.619));
  height: auto;
  margin: 0 auto;
  max-height: calc(100dvh - 220px);
  display: block;
  border-radius: 12px;
  background: var(--canvas-bg);
  border: 1px solid var(--canvas-border);
  box-shadow: 0 30px 80px var(--canvas-shadow);
  transform-origin: center 70%;
  transform: rotateX(66deg) rotateZ(-14deg) translateY(170px) scale(0.5);
  animation: introCamera 1s linear forwards;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 10, 20, 0.58);
  --modal-anchor-y: 50vh;
  padding: 1rem;
  z-index: 20;
  transition: opacity 220ms ease;
}

.modal-backdrop.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal-backdrop.hidden .modal {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.98);
}

.modal {
  width: min(720px, 100%);
  max-height: calc(100vh - 2rem);
  overflow: auto;
  border-radius: 16px;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  box-shadow: 0 24px 60px var(--modal-shadow);
  padding: 1.3rem 1.35rem 1.25rem;
  position: fixed;
  left: 50%;
  top: var(--modal-anchor-y);
  transform: translate(-50%, -50%);
  opacity: 1;
  will-change: transform, opacity;
}

.modal-backdrop.enter .modal {
  animation: modalSlideIn 620ms cubic-bezier(0.19, 0.95, 0.2, 1.08) both;
}

.modal-backdrop.exit .modal {
  animation: modalSlideOut 620ms cubic-bezier(0.26, 0.1, 0.24, 1) both;
}

.modal-close {
  position: absolute;
  right: 0.9rem;
  top: 0.8rem;
  border: 1px solid var(--surface-border);
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  cursor: pointer;
  background: transparent;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
}

.modal-kicker {
  margin: 0;
  font-family: "IBM Plex Mono", monospace;
  color: var(--muted);
  font-size: 0.78rem;
}

.modal h2 {
  margin: 0.45rem 0 0.55rem;
  font-size: clamp(1.25rem, 2vw, 1.65rem);
}

.modal p {
  margin: 0 0 0.8rem;
  color: var(--muted);
  line-height: 1.55;
}

.modal-media {
  margin: 0 0 0.85rem;
}

.modal-media.hidden {
  display: none;
}

.modal-photo {
  width: min(240px, 100%);
/*  aspect-ratio: 4 / 5; */
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--surface-border);
  box-shadow: 0 12px 24px rgba(12, 18, 28, 0.22);
  display: block;
  float: right;
}

#modal-points {
  margin: 0;
  padding-left: 1rem;
  display: grid;
  gap: 0.48rem;
  color: var(--text);
}

@keyframes introCamera {
  0% {
    transform: rotateX(66deg) rotateZ(-14deg) translateY(170px) scale(0.5);
    opacity: 0.12;
  }
  100% {
    transform: rotateX(0deg) rotateZ(0deg) translateY(0) scale(1);
    opacity: 1;
  }
}

@keyframes captionFade {
  0% { opacity: 0; }
  12% { opacity: 1; }
  66% { opacity: 1; }
  100% { opacity: 0; }
}

@keyframes labReveal {
  0% {
    opacity: 0;
    transform: translateY(56px) scale(0.97);
    filter: blur(2px);
  }
  68% {
    opacity: 1;
    transform: translateY(-6px) scale(1.008);
    filter: blur(0);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}

@keyframes modalSlideIn {
  0% {
    transform: translate(calc(-50% + 46vw), -50%) scale(0.92);
    opacity: 0;
  }
  65% {
    transform: translate(calc(-50% - 2.5vw), -50%) scale(1.015);
    opacity: 1;
  }
  82% {
    transform: translate(calc(-50% + 0.9vw), -50%) scale(0.996);
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
  }
}

@keyframes modalSlideOut {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
  }
  100% {
    transform: translate(calc(-50% - 42vw), -50%) scale(0.965);
    opacity: 0;
  }
}

@media (max-width: 1080px) {
  #canvas-container {
    padding: 0;
  }

  #flow {
    animation-duration: 5.4s;
  }
}

@media (max-height: 820px) {
  #flow {
    width: min(100%, calc((100dvh - 180px) * 1.619));
    max-height: calc(100dvh - 180px);
  }
}

@media (max-width: 980px) {
  .lab-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .topbar,
  .layout {
    width: calc(100% - 1.4rem);
  }

  .topbar {
    margin-top: 0.75rem;
    align-items: flex-start;
    gap: 0.55rem;
  }

  .top-controls {
    display: flex;
    gap: 0.4rem;
    justify-items: end;
  }

  .icon-btn {
    width: 2.38rem;
    height: 2.14rem;
  }

  .camera-caption {
    left: 0.8rem;
    right: 0.8rem;
    font-size: 0.69rem;
  }

  .lab-cards {
    grid-template-columns: 1fr;
  }
}