:root {
  color-scheme: light dark;
  --bg: #0b1020;
  --card: rgba(17, 24, 39, 0.92);
  --text: #f3f4f6;
  --muted: #cbd5e1;
  --border: rgba(148, 163, 184, 0.25);
  --accent: #60a5fa;
  --success: #34d399;
  --error: #f87171;
  --pending: #fbbf24;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #172554 0%, var(--bg) 55%);
  color: var(--text);
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(720px, 100%);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: 32px;
  line-height: 1.1;
}

.subtitle {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.form {
  margin-top: 24px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.field span {
  font-size: 14px;
  color: var(--muted);
}

input[type="file"],
input[type="number"] {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.85);
  color: var(--text);
  padding: 12px 14px;
}

.checkbox-field {
  align-items: flex-start;
  justify-content: flex-end;
  padding-top: 30px;
}

.checkbox-field input {
  margin-right: 10px;
}

button {
  width: 100%;
  border: 0;
  border-radius: 14px;
  padding: 14px 18px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: white;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.status {
  min-height: 24px;
  margin-top: 18px;
  color: var(--muted);
}

.status[data-tone="success"] {
  color: var(--success);
}

.status[data-tone="error"] {
  color: var(--error);
}

.status[data-tone="pending"] {
  color: var(--pending);
}

.result {
  margin-top: 18px;
  padding: 16px;
  border-radius: 14px;
  border: 1px solid rgba(52, 211, 153, 0.25);
  background: rgba(6, 78, 59, 0.22);
}

.result-title {
  margin: 0 0 10px;
}

.download-link {
  color: white;
  font-weight: 700;
}

.hidden {
  display: none;
}

@media (max-width: 640px) {
  .card {
    padding: 20px;
  }

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

  .checkbox-field {
    padding-top: 0;
  }

  h1 {
    font-size: 28px;
  }
}