:root {
  color-scheme: dark;
  --bg: #0a0f1d;
  --panel: #101827;
  --panel-2: #152033;
  --card: #f8fafc;
  --card-text: #172033;
  --line: rgba(217, 226, 240, 0.14);
  --line-strong: rgba(217, 226, 240, 0.28);
  --text: #edf4ff;
  --muted: #aebbd0;
  --soft: #7f8ea6;
  --accent: #4fd1c5;
  --accent-2: #f5c451;
  --danger: #ff8a8a;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(79, 209, 197, 0.12), transparent 26%),
    linear-gradient(160deg, #080d18 0%, #101827 60%, #0d1320 100%);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: transparent;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.shell {
  width: min(1280px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 18px;
  align-items: stretch;
}

.hero-copy,
.upload-panel,
.control-panel,
.preview-panel,
.summary-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(16, 24, 39, 0.92);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 28px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  line-height: 0.95;
}

.lede {
  max-width: 700px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.upload-panel {
  padding: 22px;
  display: grid;
  align-content: center;
  gap: 16px;
  border-style: dashed;
}

.upload-panel.is-active {
  border-color: rgba(79, 209, 197, 0.75);
  background: rgba(79, 209, 197, 0.08);
}

.upload-panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.primary-button,
.secondary-button,
.ghost-button,
.download-link {
  min-height: 42px;
  border-radius: 8px;
  border: 1px solid transparent;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
}

.primary-button {
  background: var(--accent);
  color: #06211f;
  font-weight: 800;
}

.secondary-button {
  background: rgba(245, 196, 81, 0.14);
  border-color: rgba(245, 196, 81, 0.34);
}

.ghost-button,
.download-link {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--line);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.wide {
  width: 100%;
}

.download-link {
  width: 100%;
  margin-top: 10px;
}

.file-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--soft);
  font-size: 0.92rem;
}

.file-meta span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.summary-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.summary-card {
  padding: 16px;
  box-shadow: none;
}

.summary-card span {
  display: block;
  color: var(--soft);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.summary-card strong {
  display: block;
  margin-top: 8px;
  font-size: 1.45rem;
}

.workspace {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.control-panel,
.preview-panel {
  padding: 18px;
}

.control-panel {
  position: sticky;
  top: 16px;
}

.section-title {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 14px;
}

.section-title h2 {
  margin: 0;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.section-title p {
  margin: 6px 0 0;
  color: var(--muted);
  line-height: 1.55;
  font-size: 0.92rem;
}

.range-field {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.range-field input {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  background: #0b1220;
  padding: 0 12px;
  outline: none;
}

.range-field input:focus {
  border-color: rgba(79, 209, 197, 0.75);
  box-shadow: 0 0 0 3px rgba(79, 209, 197, 0.12);
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

.button-row .secondary-button {
  grid-column: 1 / -1;
}

.feedback {
  min-height: 46px;
  margin: 14px 0 22px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.035);
  line-height: 1.45;
}

.feedback.is-error {
  color: #ffe1e1;
  border-color: rgba(255, 138, 138, 0.42);
  background: rgba(255, 138, 138, 0.08);
}

.details-list {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
}

.details-list div {
  display: grid;
  gap: 5px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.details-list dt {
  color: var(--soft);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.details-list dd {
  margin: 0;
  color: var(--text);
  overflow-wrap: anywhere;
}

.panel-title {
  align-items: start;
}

.page-grid {
  min-height: 340px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}

.empty-state {
  grid-column: 1 / -1;
  min-height: 320px;
  display: grid;
  place-content: center;
  gap: 8px;
  text-align: center;
  color: var(--muted);
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
}

.empty-state strong {
  color: var(--text);
}

.empty-state p {
  margin: 0;
}

.page-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.035);
  overflow: hidden;
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease, transform 140ms ease;
}

.page-card:hover {
  border-color: rgba(79, 209, 197, 0.45);
}

.page-card.is-selected {
  border-color: rgba(79, 209, 197, 0.9);
  background: rgba(79, 209, 197, 0.08);
}

.page-card-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 12px;
}

.page-card-header label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
}

.page-card-header input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.page-size {
  color: var(--soft);
  font-size: 0.82rem;
}

.canvas-frame {
  min-height: 230px;
  display: grid;
  place-items: center;
  padding: 12px;
  background: #d8dee8;
}

.canvas-frame canvas {
  max-width: 100%;
  height: auto;
  background: white;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.26);
}

.page-report {
  display: grid;
  gap: 8px;
  padding: 12px;
  color: var(--muted);
  font-size: 0.88rem;
}

.report-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding-bottom: 7px;
}

.report-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.report-row strong {
  color: var(--text);
  text-align: right;
}

.image-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.image-list li + li {
  margin-top: 4px;
}

@media (max-width: 920px) {
  .hero,
  .workspace,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .control-panel {
    position: static;
  }
}

@media (max-width: 560px) {
  .shell {
    width: min(100% - 24px, 1280px);
    padding-top: 20px;
  }

  .hero-copy,
  .upload-panel,
  .control-panel,
  .preview-panel {
    padding: 14px;
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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