:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #657086;
  --accent: #3859ff;
  --accent-dark: #263fc5;
  --border: #dbe1ee;
  --success: #146c43;
  --danger: #b42318;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
}

.hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  padding: 4rem clamp(1rem, 5vw, 5rem) 2rem;
  background: linear-gradient(135deg, #172033, #314aa8);
  color: #ffffff;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: #b9c7ff;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 1rem;
  font-size: clamp(2.25rem, 6vw, 5rem);
  line-height: 0.95;
}

h2 {
  margin-bottom: 1rem;
  font-size: 1.15rem;
}

.hero-text {
  max-width: 720px;
  margin-bottom: 0;
  color: #dfe6ff;
  font-size: 1.1rem;
}

.privacy-card {
  display: grid;
  min-width: 260px;
  gap: 0.35rem;
  padding: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 1.25rem;
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.2);
}

.privacy-card span {
  color: #dfe6ff;
}

.layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding: 1rem clamp(1rem, 5vw, 5rem) 2rem;
}

.panel {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  background: var(--panel);
  box-shadow: 0 0.75rem 2rem rgba(23, 32, 51, 0.08);
}

.preview-panel {
  grid-column: 1 / -1;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.drop-zone {
  display: grid;
  gap: 0.35rem;
  padding: 1.5rem;
  border: 2px dashed var(--border);
  border-radius: 1rem;
  background: #f9fbff;
  cursor: pointer;
}

.drop-zone span {
  font-weight: 800;
}

.drop-zone small,
.hint,
.status,
footer {
  color: var(--muted);
}

input,
select,
button {
  width: 100%;
  border-radius: 0.75rem;
  font: inherit;
}

input,
select {
  margin-top: 0.4rem;
  padding: 0.85rem 0.9rem;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--ink);
}

input[type="file"] {
  margin-top: 0.75rem;
}

label {
  display: block;
  color: var(--ink);
  font-weight: 700;
}

button {
  margin-top: 0.75rem;
  padding: 0.9rem 1rem;
  border: 0;
  background: var(--accent);
  color: #ffffff;
  font-weight: 800;
  cursor: pointer;
}

button:hover:not(:disabled) {
  background: var(--accent-dark);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 0.85rem;
}

.status {
  margin: 0.85rem 0 0;
}

.status.ok {
  color: var(--success);
}

.status.error {
  color: var(--danger);
}

#previewFrame {
  width: 100%;
  height: min(72vh, 820px);
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: #f9fbff;
}

footer {
  padding: 0 1rem 2rem;
  text-align: center;
}

@media (max-width: 820px) {
  .hero,
  .preview-header {
    align-items: stretch;
    flex-direction: column;
  }

  .layout,
  .grid {
    grid-template-columns: 1fr;
  }
}