:root {
  --cream: #f0f6fb;
  --sky: #9dd4f0;
  --lavender: #cfc2f5;
  --mist: #b8d9f4;
  --mint: #9ee4c5;
  --ink: #2d3142;
  --ink-soft: #5c6178;
  --accent: #8b9ef0;
  --accent-2: #5fc9d8;
  --card: #ffffff;
  --shadow: rgba(45, 49, 66, 0.12);
  --radius: 20px;
  --radius-sm: 14px;
  --max: 720px;
  --section-gap: 1.15rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Nunito", system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--cream);
  background-image:
    radial-gradient(circle at 12% 18%, var(--sky) 0%, transparent 44%),
    radial-gradient(circle at 88% 12%, var(--lavender) 0%, transparent 40%),
    radial-gradient(circle at 70% 88%, var(--mist) 0%, transparent 38%),
    radial-gradient(circle at 20% 80%, var(--mint) 0%, transparent 36%);
  background-attachment: fixed;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0.75rem;
  padding: 0.5rem 1rem;
  background: var(--ink);
  color: #fff;
  border-radius: 999px;
  z-index: 100;
  font-weight: 700;
}

.skip-link:focus {
  left: 0.75rem;
}

.site-header {
  position: relative;
  padding: 1.5rem 1.25rem 1.75rem;
  text-align: center;
  overflow: hidden;
}

.header-inner {
  position: relative;
  z-index: 1;
  max-width: 34rem;
  margin: 0 auto;
}

.header-blobs {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 120%, var(--mint) 0%, transparent 55%),
    radial-gradient(circle at 0% 50%, var(--lavender) 0%, transparent 30%),
    radial-gradient(circle at 100% 40%, var(--sky) 0%, transparent 32%);
  opacity: 0.35;
}

.eyebrow {
  font-family: "Fredoka", sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin: 0 0 0.5rem;
}

.title {
  font-family: "Fredoka", sans-serif;
  font-weight: 700;
  font-size: clamp(2.25rem, 6vw, 3.25rem);
  line-height: 1.1;
  margin: 0 0 0.25rem;
  color: var(--ink);
  text-shadow: 3px 3px 0 var(--sky);
}

.title-term {
  margin: 0 0 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
}

.tagline {
  margin: 0;
  font-size: 1rem;
  color: var(--ink-soft);
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem 4.75rem;
}

.page-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: flex-end;
  margin-bottom: 1rem;
}

.tool-btn {
  font-family: "Fredoka", sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 2px solid #dde3f0;
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
  cursor: pointer;
  box-shadow: 0 2px 0 var(--shadow);
}

.tool-btn:hover {
  background: var(--lavender);
  border-color: transparent;
}

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

.collapse-panel {
  margin-bottom: var(--section-gap);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: 0 4px 0 var(--shadow);
  border: 2px solid rgba(255, 255, 255, 0.75);
  overflow: hidden;
}

.collapse-panel--alt {
  background: linear-gradient(180deg, #f2f5fe 0%, #fff 55%);
}

.collapse-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
  padding: 0.85rem 1.1rem;
  cursor: pointer;
  list-style: none;
}

.collapse-summary::-webkit-details-marker {
  display: none;
}

.collapse-summary::marker {
  content: "";
}

.collapse-summary-main {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
  text-align: left;
}

.section-icon {
  font-family: "Fredoka", sans-serif;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 50%;
  box-shadow: 0 3px 0 var(--shadow);
  font-size: 0.95rem;
  line-height: 1;
}

.collapse-heading {
  font-family: "Fredoka", sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  margin: 0;
  line-height: 1.2;
}

.collapse-chevron {
  flex-shrink: 0;
  width: 0.5rem;
  height: 0.5rem;
  border-right: 3px solid var(--ink-soft);
  border-bottom: 3px solid var(--ink-soft);
  transform: rotate(45deg);
  margin-bottom: 0.15rem;
  opacity: 0.85;
  transition: transform 0.2s ease;
}

.collapse-panel[open] > .collapse-summary .collapse-chevron {
  transform: rotate(-135deg);
  margin-bottom: -0.1rem;
}

.collapse-summary:hover {
  background: rgba(184, 232, 245, 0.2);
}

.collapse-body {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 0.85rem 1.1rem 1.2rem;
  border-top: 1px solid rgba(45, 49, 66, 0.07);
}

.card {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 1.15rem 1.2rem;
  box-shadow: 0 4px 0 var(--shadow);
  border: 2px solid rgba(255, 255, 255, 0.7);
}

.prose p {
  margin: 0 0 1rem;
}

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

.problem-statement {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.95) 0%, rgba(240, 246, 251, 0.88) 100%);
  border: 2px solid rgba(255, 255, 255, 0.85);
  box-shadow:
    0 4px 0 var(--shadow),
    0 0 0 1px rgba(157, 212, 240, 0.35);
}

.problem-block {
  margin: 0;
  padding: 1rem 1rem 1rem 1.15rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(45, 49, 66, 0.08);
  position: relative;
  overflow: hidden;
}

.problem-block::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  border-radius: 5px 0 0 5px;
}

.problem-block p {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--ink);
}

.problem-block-label {
  display: block;
  font-family: "Fredoka", sans-serif;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.55rem;
}

.problem-block--context {
  background: linear-gradient(135deg, rgba(157, 212, 240, 0.22) 0%, rgba(255, 255, 255, 0.65) 100%);
}

.problem-block--context::before {
  background: linear-gradient(180deg, var(--sky) 0%, var(--accent) 100%);
}

.problem-block--overload {
  background: linear-gradient(135deg, rgba(207, 194, 245, 0.2) 0%, rgba(255, 255, 255, 0.65) 100%);
}

.problem-block--overload::before {
  background: linear-gradient(180deg, var(--lavender) 0%, #a89ae8 100%);
}

.problem-block--vision {
  background: linear-gradient(135deg, rgba(158, 228, 197, 0.28) 0%, rgba(255, 255, 255, 0.75) 100%);
  border-color: rgba(95, 201, 216, 0.25);
}

.problem-block--vision::before {
  background: linear-gradient(180deg, var(--mint) 0%, var(--accent-2) 100%);
}

.problem-block--vision .problem-block-label {
  color: var(--ink);
}

.team-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.2rem;
}

@media (min-width: 560px) {
  .team-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.person {
  text-align: center;
  padding-top: 1.15rem;
}

.person h3 {
  font-family: "Fredoka", sans-serif;
  font-size: 1.15rem;
  margin: 0.65rem 0 0.35rem;
}

.person .bio {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.avatar {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: "Fredoka", sans-serif;
  font-weight: 700;
  font-size: 1.35rem;
  color: #fff;
  background: hsl(var(--hue, 200), 70%, 62%);
  box-shadow: 0 4px 0 var(--shadow);
  border: 3px solid #fff;
}

.avatar.avatar--emoji {
  width: 4rem;
  height: 4rem;
  font-family: "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji", sans-serif;
  font-size: 2.15rem;
  font-weight: 400;
  line-height: 1;
  color: unset;
  background: linear-gradient(160deg, hsl(var(--hue, 200), 72%, 70%) 0%, hsl(var(--hue, 200), 65%, 56%) 100%);
}

.concept-intro {
  border-left: 4px solid var(--accent-2);
}

.concept-visuals {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  padding: 1.1rem 1.15rem 1.2rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.92) 0%, rgba(184, 217, 244, 0.2) 45%, rgba(207, 194, 245, 0.18) 100%);
  border: 2px solid rgba(255, 255, 255, 0.85);
  box-shadow: 0 4px 0 var(--shadow);
}

.concept-gallery {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  margin: 0 auto;
  width: fit-content;
  max-width: 100%;
}

.concept-gallery-top {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  max-width: 100%;
}

.concept-gallery-bottom {
  display: flex;
  justify-content: center;
  align-items: center;
  width: min(720px, 100%);
  max-width: 100%;
}

.concept-shot {
  margin: 0;
}

.concept-shot--thumb {
  flex: 0 1 auto;
  width: min(300px, calc(50% - 0.5rem));
  max-width: 320px;
}

.concept-shot--hero {
  width: 100%;
  max-width: min(720px, 100%);
}

@media (max-width: 420px) {
  .concept-gallery-top {
    flex-direction: column;
    align-items: center;
  }

  .concept-shot--thumb {
    width: min(300px, 100%);
    max-width: 100%;
  }
}

.concept-shot-frame {
  position: relative;
  border-radius: 14px;
  padding: 0.45rem;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(240, 246, 251, 0.65));
  border: 1px solid rgba(45, 49, 66, 0.08);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 3px 12px rgba(45, 49, 66, 0.08);
}

.concept-shot-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 14px;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(157, 212, 240, 0.35);
}

.concept-shot img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  background: #fff;
}

.diagram {
  margin: 0;
}

.diagram figcaption {
  font-family: "Fredoka", sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.65rem;
  color: var(--ink-soft);
}

.diagram svg {
  width: 100%;
  height: auto;
  display: block;
}

.panel-bg {
  fill: #f4f6fb;
  stroke: #dde3f0;
  stroke-width: 2;
}

.svg-caption {
  font-family: "Fredoka", sans-serif;
  font-size: 11px;
  fill: var(--ink-soft);
}

.flow-box {
  fill: #fff;
  stroke: #c5cee0;
  stroke-width: 2;
}

.flow-arrow {
  stroke: var(--ink-soft);
  stroke-width: 3;
  fill: none;
}

.svg-label {
  font-family: "Fredoka", sans-serif;
  font-size: 12px;
  fill: var(--ink);
}

.novelty h3 {
  font-family: "Fredoka", sans-serif;
  font-size: 1.1rem;
  margin: 0 0 0.6rem;
}

.novelty ul {
  margin: 0;
  padding-left: 1.2rem;
}

.novelty li {
  margin-bottom: 0.5rem;
}

.novelty li:last-child {
  margin-bottom: 0;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.timeline-item {
  position: relative;
}

.timeline-item h3 {
  font-family: "Fredoka", sans-serif;
  font-size: 1.15rem;
  margin: 0 0 0.35rem;
}

.timeline-item p {
  margin: 0 0 0.85rem;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.timeline-item:has(.process-media) p {
  margin-bottom: 0.5rem;
}

.process-media {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.15rem;
  width: 100%;
}

.process-media-frame {
  position: relative;
  width: 100%;
  max-width: min(480px, 100%);
  border-radius: 14px;
  padding: 0.4rem;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(240, 246, 251, 0.65));
  border: 1px solid rgba(45, 49, 66, 0.08);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 3px 12px rgba(45, 49, 66, 0.08);
}

.process-media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 14px;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(157, 212, 240, 0.35);
}

.process-media-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  background: #fff;
}

.process-media--compact .process-media-frame {
  max-width: min(380px, 100%);
}

.process-media--final .process-media-frame {
  max-width: min(560px, 100%);
}

.artifact {
  height: 72px;
  border-radius: var(--radius-sm);
  border: 2px dashed #c5cee0;
}

.phony-sketch {
  background: repeating-linear-gradient(
      90deg,
      transparent,
      transparent 10px,
      rgba(126, 200, 227, 0.15) 10px,
      rgba(126, 200, 227, 0.15) 11px
    ),
    linear-gradient(160deg, #fff 0%, #f0f4ff 100%);
}

.phony-whiteboard {
  background: linear-gradient(135deg, #f7f9fc 0%, #eef2ff 100%);
  background-image: radial-gradient(circle at 30% 40%, rgba(167, 139, 250, 0.32) 0%, transparent 35%),
    radial-gradient(circle at 70% 60%, rgba(126, 200, 227, 0.38) 0%, transparent 40%);
}

.phony-3d {
  background: linear-gradient(145deg, #dce6ff, #fff);
  box-shadow: inset 0 -6px 0 rgba(45, 49, 66, 0.06);
}

.phony-photo {
  background: linear-gradient(90deg, #b8d4f4, #d4ccf7, #a8e6cf);
  opacity: 0.95;
}

.video-shell {
  padding: 0;
  overflow: hidden;
  border-radius: var(--radius);
}

.video-shell iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  display: block;
}

.video-drive-help {
  margin: 0.65rem 0 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
  text-align: center;
  line-height: 1.45;
}

.video-drive-help a {
  font-weight: 700;
  color: var(--accent);
}

.video-placeholder {
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #d4ecfc, #e4e0fc);
  border: 3px dashed #b8c5e0;
  box-shadow: none;
}

.video-placeholder-inner {
  text-align: center;
  padding: 1rem 1.5rem;
  max-width: 22rem;
}

.video-placeholder-inner p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.video-placeholder-inner code {
  font-size: 0.88em;
  background: rgba(255, 255, 255, 0.8);
  padding: 0.1em 0.35em;
  border-radius: 6px;
}

.play-fake {
  display: inline-grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
  color: #fff;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 4px 0 var(--shadow);
  border: 3px solid #fff;
}

.demo-notes {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.demo-notes li {
  margin-bottom: 0.55rem;
}

.demo-notes li:last-child {
  margin-bottom: 0;
}

.repo-card {
  text-align: center;
}

.repo-card p {
  margin: 0 0 0.9rem;
  color: var(--ink-soft);
}

.repo-link {
  display: inline-block;
  font-family: "Fredoka", sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  background: var(--sky);
  border: 2px solid #fff;
  box-shadow: 0 4px 0 var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.repo-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 var(--shadow);
}

.repo-link:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.fab-nav {
  position: fixed;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem;
  max-width: calc(100% - 2rem);
  padding: 0.45rem 0.55rem;
  background: rgba(240, 246, 251, 0.94);
  backdrop-filter: blur(8px);
  border-radius: 999px;
  box-shadow: 0 8px 24px var(--shadow);
  border: 2px solid #fff;
  z-index: 50;
}

.fab-nav a {
  font-family: "Fredoka", sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  background: transparent;
}

.fab-nav a:hover {
  background: var(--lavender);
}

.fab-nav a:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .collapse-chevron {
    transition: none;
  }

  .repo-link {
    transition: none;
  }

  .repo-link:hover {
    transform: none;
  }
}

/* -------------------------------------------------------------------------- */
/* Vertical / horizontal prototype gallery (own frame class — no 480px cap) */
/* Breaks out of timeline card padding + collapse-body padding for max width */

.process-media.proto-dual {
  --proto-bleed: calc(1.2rem + 1.1rem);

  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.65rem;
  width: calc(100% + 2 * var(--proto-bleed));
  max-width: none;
  margin-top: 0.35rem;
  margin-left: calc(-1 * var(--proto-bleed));
  margin-right: calc(-1 * var(--proto-bleed));
  box-sizing: border-box;
}

.proto-dual__figure {
  margin: 0;
  width: 100%;
  max-width: none;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.18rem;
}

.proto-dual__frame {
  position: relative;
  width: 100%;
  max-width: none;
  padding: 0.38rem;
  border-radius: 14px;
  box-sizing: border-box;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(240, 246, 251, 0.65));
  border: 1px solid rgba(45, 49, 66, 0.08);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 3px 12px rgba(45, 49, 66, 0.08);
}

.proto-dual__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 14px;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(157, 212, 240, 0.35);
}

.proto-dual__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  background: #fff;
}

.proto-dual__cap {
  margin: 0;
  font-family: "Fredoka", sans-serif;
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.055em;
  line-height: 1.25;
  color: var(--ink-soft);
  text-align: center;
}