:root {
  --bg: #10141d;
  --panel: rgba(12, 18, 31, 0.74);
  --panel-strong: rgba(16, 24, 41, 0.92);
  --line: rgba(255, 255, 255, 0.12);
  --text: #eff3f7;
  --muted: #a2acba;
  --accent: #f76d3c;
  --accent-soft: rgba(247, 109, 60, 0.15);
  --air: #7fd3ff;
  --land: #d7d37a;
  --road: #ffb45d;
  --rail: #a8ff90;
  --sea: #87b3ff;
  --space: #d0abff;
  --shadow: 0 24px 90px rgba(0, 0, 0, 0.34);
  --radius: 28px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background-color: #10141d;
}

body {
  background:
    radial-gradient(circle at 20% 20%, rgba(127, 211, 255, 0.18), transparent 28%),
    radial-gradient(circle at 80% 10%, rgba(247, 109, 60, 0.16), transparent 24%),
    radial-gradient(circle at 70% 80%, rgba(208, 171, 255, 0.16), transparent 24%),
    linear-gradient(180deg, #0d1118 0%, #10141d 42%, #0c1017 100%);
  color: var(--text);
  font-family: "Chakra Petch", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at center, black 55%, transparent 95%);
  pointer-events: none;
}

.backdrop {
  position: fixed;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.04), transparent 35%),
    linear-gradient(315deg, rgba(255, 255, 255, 0.02), transparent 35%);
  pointer-events: none;
}

.shell {
  width: min(1680px, calc(100% - 40px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.hero {
  position: relative;
  padding: 30px 8px 34px;
}

.eyebrow,
.panel-kicker {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1,
.panel h2,
.result-card h3 {
  margin: 0;
  font-family: "Instrument Serif", serif;
  font-weight: 400;
}

.hero h1 {
  max-width: 12ch;
  font-size: clamp(3.2rem, 7vw, 6.7rem);
  line-height: 0.96;
  letter-spacing: -0.03em;
}

.hero-copy {
  max-width: 62ch;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.stat-pill,
.chip,
.source-link,
.license-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  text-decoration: none;
}

.stat-pill {
  padding: 10px 14px;
  color: var(--muted);
  font-size: 0.9rem;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(420px, 0.95fr);
  grid-template-areas: "controls result";
  align-items: start;
  gap: 20px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.controls-panel,
.result-panel,
.source-panel {
  padding: 24px;
}

.controls-panel {
  grid-area: controls;
}

.result-panel {
  grid-area: result;
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.panel h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 0.95;
}

.panel-note {
  margin: 0;
  max-width: 20ch;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
  text-align: right;
}

.control-actions,
.generator-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.generator-actions {
  width: 100%;
  margin-top: 18px;
}

button {
  border: 0;
  font: inherit;
  cursor: pointer;
  transition:
    transform 140ms ease,
    background 140ms ease,
    border-color 140ms ease,
    opacity 140ms ease;
}

button:hover {
  transform: translateY(-1px);
}

.primary-button,
.secondary-button,
.ghost-button {
  border-radius: 999px;
  padding: 13px 18px;
  letter-spacing: 0.03em;
}

.primary-button {
  background: linear-gradient(135deg, #f76d3c 0%, #ffa566 100%);
  color: #170e0a;
  font-weight: 700;
}

.generator-actions .primary-button {
  width: 100%;
  justify-content: center;
}

.secondary-button,
.ghost-button {
  border: 1px solid var(--line);
  color: var(--text);
}

.secondary-button {
  background: rgba(255, 255, 255, 0.05);
}

.ghost-button {
  background: transparent;
}

.category-groups {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.group-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent),
    var(--panel-strong);
}

.group-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.group-heading h3 {
  margin: 0;
  font-size: 1.15rem;
}

.group-heading span {
  color: var(--muted);
  font-size: 0.85rem;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}

.category-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 92px;
  padding: 14px 14px 14px 44px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.025);
  cursor: pointer;
}

.category-tile input {
  position: absolute;
  left: 14px;
  top: 17px;
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.category-tile strong {
  font-size: 0.95rem;
  line-height: 1.25;
}

.category-tile span {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

.category-tile:hover,
.category-tile:has(input:checked) {
  border-color: rgba(247, 109, 60, 0.45);
  background: linear-gradient(180deg, var(--accent-soft), rgba(255, 255, 255, 0.03));
}

.result-card {
  position: relative;
  min-height: 380px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background:
    radial-gradient(circle at top right, rgba(247, 109, 60, 0.15), transparent 34%),
    radial-gradient(circle at bottom left, rgba(127, 211, 255, 0.12), transparent 30%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  overflow: hidden;
}

.result-card::after {
  content: "";
  position: absolute;
  inset: auto -40px -40px auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.result-media {
  position: relative;
  min-height: clamp(280px, 28vw, 340px);
  margin-bottom: 20px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02)),
    rgba(7, 10, 16, 0.7);
}

.image-skeleton {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      110deg,
      rgba(255, 255, 255, 0.04) 8%,
      rgba(255, 255, 255, 0.12) 18%,
      rgba(255, 255, 255, 0.04) 33%
    ),
    linear-gradient(180deg, rgba(127, 211, 255, 0.08), rgba(247, 109, 60, 0.08));
  background-size: 200% 100%, 100% 100%;
  pointer-events: none;
  opacity: 0;
  transition: opacity 180ms ease;
}

.result-media[data-loading="true"] .image-skeleton {
  opacity: 1;
  animation: image-shimmer 1.35s linear infinite;
}

.image-open-link {
  position: relative;
  display: block;
  min-height: inherit;
  color: inherit;
  text-decoration: none;
}

.vehicle-image {
  display: block;
  width: 100%;
  height: clamp(280px, 28vw, 340px);
  object-fit: cover;
  object-position: center;
  opacity: 1;
  transition:
    opacity 180ms ease,
    transform 180ms ease,
    filter 180ms ease;
}

.result-media[data-loading="true"] .vehicle-image {
  opacity: 0;
}

.image-open-link:hover .vehicle-image {
  transform: scale(1.02);
  filter: brightness(1.03);
}

.image-open-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(11, 16, 28, 0.78);
  color: var(--text);
  font-size: 0.74rem;
  line-height: 1;
  backdrop-filter: blur(10px);
}

.image-credit {
  position: absolute;
  right: 14px;
  bottom: 14px;
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(11, 16, 28, 0.78);
  color: var(--text);
  font-size: 0.76rem;
  text-decoration: none;
  backdrop-filter: blur(10px);
}

.result-hint {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.92rem;
}

.result-card h3 {
  max-width: 14ch;
  font-size: clamp(2.5rem, 5vw, 4.6rem);
  line-height: 0.96;
}

.vehicle-description {
  max-width: 58ch;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.65;
}

.tag-row,
.source-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.source-row {
  margin-top: 14px;
}

.chip,
.source-link,
.license-link {
  padding: 9px 12px;
  font-size: 0.82rem;
}

.chip.air {
  border-color: rgba(127, 211, 255, 0.45);
  color: var(--air);
}

.chip.land {
  border-color: rgba(215, 211, 122, 0.45);
  color: var(--land);
}

.chip.road {
  border-color: rgba(255, 180, 93, 0.45);
  color: var(--road);
}

.chip.rail {
  border-color: rgba(168, 255, 144, 0.45);
  color: var(--rail);
}

.chip.sea {
  border-color: rgba(135, 179, 255, 0.45);
  color: var(--sea);
}

.chip.space {
  border-color: rgba(208, 171, 255, 0.45);
  color: var(--space);
}

.source-panel {
  margin-top: 18px;
}

.source-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.source-card {
  display: grid;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.025);
}

.source-card strong {
  font-size: 1rem;
}

.source-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.55;
}

a:hover {
  border-color: rgba(247, 109, 60, 0.45);
  color: var(--text);
}

@keyframes image-shimmer {
  from {
    background-position: 200% 0, 0 0;
  }

  to {
    background-position: -200% 0, 0 0;
  }
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "result"
      "controls";
  }

  .panel-head {
    flex-direction: column;
  }

  .panel-note {
    max-width: none;
    text-align: left;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 16px, 100%);
    padding-top: 18px;
  }

  .controls-panel,
  .result-panel,
  .source-panel {
    padding: 18px;
  }

  .checkbox-grid {
    grid-template-columns: 1fr;
  }

  .result-card {
    min-height: 320px;
    padding: 18px;
  }

  .hero {
    padding: 18px 6px 22px;
  }

  .hero-copy {
    font-size: 0.98rem;
    line-height: 1.6;
  }

  .hero-stats,
  .control-actions,
  .generator-actions {
    gap: 10px;
  }

  .vehicle-image {
    height: 240px;
  }

  .result-media {
    min-height: 240px;
  }

  .image-credit {
    right: 10px;
    bottom: 10px;
    padding: 7px 10px;
    font-size: 0.72rem;
  }

  .image-open-badge {
    top: 10px;
    right: 10px;
    padding: 7px 10px;
    font-size: 0.7rem;
  }
}

@media (min-width: 1500px) {
  .shell {
    width: min(1840px, calc(100% - 56px));
  }

  .layout {
    grid-template-columns: minmax(0, 1.3fr) minmax(500px, 1fr);
    gap: 24px;
  }

  .hero-copy {
    max-width: 70ch;
  }
}