:root {
  --bg: #080d23;
  --panel: rgba(10, 20, 48, 0.86);
  --panel-strong: #101b3f;
  --text: #f7fbff;
  --muted: #9db7c8;
  --accent: #ff3ea5;
  --accent-2: #22f4ff;
  --accent-3: #ffd36a;
  --line: rgba(34, 244, 255, 0.22);
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.36), 0 0 36px rgba(255, 62, 165, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  position: relative;
  min-height: 100vh;
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background:
    linear-gradient(115deg, rgba(255, 62, 165, 0.2), transparent 28%),
    linear-gradient(245deg, rgba(34, 244, 255, 0.18), transparent 30%),
    linear-gradient(180deg, #151048 0%, #081126 46%, #050818 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 48% -12% -24%;
  z-index: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(90deg, rgba(34, 244, 255, 0.16) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(255, 62, 165, 0.16) 0 1px, transparent 1px 44px);
  transform: perspective(420px) rotateX(58deg);
  transform-origin: top;
  opacity: 0.58;
}

.page-shell {
  position: relative;
  z-index: 1;
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.hero {
  display: block;
  margin-bottom: 24px;
}

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

.hero-copy {
  padding: 34px;
  background:
    linear-gradient(135deg, rgba(255, 62, 165, 0.22), transparent 36%),
    linear-gradient(235deg, rgba(34, 244, 255, 0.2), transparent 38%),
    var(--panel);
}

.eyebrow,
.meta-label,
.panel-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
  text-shadow: 0 0 16px rgba(34, 244, 255, 0.42);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.4rem, 4vw, 4.5rem);
  line-height: 0.96;
  margin-bottom: 16px;
  max-width: 14ch;
  color: var(--text);
  text-shadow:
    0 0 22px rgba(34, 244, 255, 0.36),
    0 0 34px rgba(255, 62, 165, 0.28);
}

.lead {
  max-width: 58ch;
  color: var(--muted);
  font-size: 1.05rem;
}

.workflow {
  display: grid;
  gap: 18px;
  margin-bottom: 24px;
}

.stage-pane {
  display: none;
}

.stage-pane.active {
  display: block;
}

.stage-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: 18px;
  align-items: start;
}

.stage-column {
  min-width: 0;
}

.stage-preview-column {
  align-self: stretch;
}

.load-stack {
  display: grid;
  gap: 14px;
}

.stage-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.hero-points {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 22px;
}

.hero-points span,
.ghost-btn,
.primary-btn {
  border-radius: 8px;
  padding: 11px 16px;
  border: 1px solid var(--line);
}

.hero-points span {
  background: rgba(7, 14, 34, 0.72);
  color: var(--text);
  box-shadow: inset 0 0 18px rgba(34, 244, 255, 0.08);
}

.preview-shell {
  margin-bottom: 18px;
}

.source-video {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #050818;
  display: block;
  margin-bottom: 12px;
  max-height: 420px;
  box-shadow: 0 0 28px rgba(34, 244, 255, 0.1);
}

#source-video[hidden] {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

#annotated-video[hidden],
.stage-pane[hidden] {
  display: none !important;
}

.load-stack .source-video {
  margin-bottom: 0;
}

.drop-zone {
  min-height: 180px;
  border: 2px dashed rgba(34, 244, 255, 0.52);
  border-radius: 14px;
  padding: 30px 24px;
  text-align: center;
  background:
    linear-gradient(135deg, rgba(255, 62, 165, 0.18), transparent 42%),
    linear-gradient(225deg, rgba(34, 244, 255, 0.16), transparent 46%),
    rgba(5, 11, 30, 0.76);
  display: grid;
  gap: 8px;
  place-items: center;
  cursor: pointer;
  touch-action: manipulation;
  box-shadow: inset 0 0 32px rgba(34, 244, 255, 0.09), 0 0 26px rgba(255, 62, 165, 0.1);
}

.drop-zone strong {
  color: var(--text);
  text-shadow: 0 0 16px rgba(255, 62, 165, 0.38);
}

.drop-zone span {
  color: var(--muted);
}

.drop-zone.dragover {
  border-color: var(--accent);
  background:
    linear-gradient(135deg, rgba(255, 62, 165, 0.28), transparent 42%),
    linear-gradient(225deg, rgba(34, 244, 255, 0.2), transparent 46%),
    rgba(9, 18, 43, 0.86);
}

.load-stack .primary-btn {
  width: 100%;
  min-height: 50px;
  font-size: 1.02rem;
}

.load-meta {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(5, 11, 30, 0.62);
  padding: 14px 16px;
}

#preview-canvas,
#rectified-canvas {
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(34, 244, 255, 0.14), rgba(255, 62, 165, 0.08));
  display: block;
  box-shadow: 0 0 28px rgba(34, 244, 255, 0.1);
}

.preview-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 12px;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
}

.card {
  padding: 28px;
}

.section-head {
  margin-bottom: 18px;
}

.section-head.compact {
  margin-top: 18px;
}

label {
  display: block;
}

label span {
  display: block;
  margin-bottom: 8px;
  font-size: 0.92rem;
  color: var(--muted);
}

input,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 13px 14px;
  font: inherit;
  background: rgba(5, 11, 30, 0.78);
  color: var(--text);
}

.file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.primary-btn,
.ghost-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-weight: 700;
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.primary-btn {
  background: linear-gradient(135deg, var(--accent), #ff7bd1);
  color: #fff;
  border: 0;
  box-shadow: 0 0 24px rgba(255, 62, 165, 0.28);
}

.ghost-btn {
  background: rgba(5, 11, 30, 0.7);
  color: var(--text);
  box-shadow: inset 0 0 18px rgba(34, 244, 255, 0.07);
}

.primary-btn:hover,
.ghost-btn:hover {
  transform: translateY(-1px);
}

.primary-btn:disabled,
.ghost-btn.disabled {
  opacity: 0.45;
  pointer-events: none;
}

.results-card {
  overflow: hidden;
}

.result-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 16px;
}

.actions {
  display: flex;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.progress-track {
  height: 10px;
  background: rgba(247, 251, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 18px;
}

#progress-bar {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  transition: width 180ms ease;
  box-shadow: 0 0 18px rgba(34, 244, 255, 0.45);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.metric-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(5, 11, 30, 0.7);
  padding: 16px 18px;
  box-shadow: inset 0 0 22px rgba(255, 62, 165, 0.06);
}

.metric-card strong {
  display: block;
  font-size: 1.7rem;
  margin-top: 6px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(5, 11, 30, 0.72);
}

.results-media {
  margin-bottom: 18px;
}

.advanced-panel {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(5, 11, 30, 0.62);
  overflow: hidden;
}

.advanced-panel summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 18px;
  font-weight: 700;
}

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

.advanced-panel[open] summary {
  border-bottom: 1px solid var(--line);
}

.advanced-panel-body {
  padding: 16px 18px 18px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

th {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-2);
}

tbody tr.flagged {
  background: rgba(255, 62, 165, 0.12);
}

@media (max-width: 900px) {
  .hero,
  .result-meta,
  .metric-grid,
  .stage-grid {
    grid-template-columns: 1fr;
  }

  .page-shell {
    width: min(100% - 20px, 1200px);
    padding-top: 18px;
  }

  h1 {
    max-width: none;
  }
}