:root {
  color-scheme: light;
  --bg: #f3f6fb;
  --surface: #ffffff;
  --surface-hover: #f6f9ff;
  --border: #d8e1ef;
  --text: #1b2b4d;
  --muted: #5f7090;
  --accent: #2f6fdd;
  --accent-hover: #255ec2;
  --danger: #d63b46;
  --ok: #1f9d62;
  --radius: 14px;
  --font: Inter, "Segoe UI", system-ui, -apple-system, sans-serif;
  --shadow-sm: 0 4px 14px rgba(33, 55, 99, 0.06);
  --shadow-lg: 0 10px 30px rgba(33, 55, 99, 0.1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background:
    radial-gradient(circle at top left, #eaf0ff 0%, transparent 42%),
    radial-gradient(circle at bottom right, #eaf7ff 0%, transparent 38%),
    var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.page {
  max-width: 780px;
  margin: 0 auto;
  padding: 2.25rem 1.25rem 3rem;
}

.header {
  margin-bottom: 1.9rem;
}

.title {
  margin: 0 0 0.5rem;
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  max-width: 66ch;
}

.main {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem 1.4rem;
  box-shadow: var(--shadow-sm);
}

.card--result {
  border-style: solid;
}

.card__title {
  margin: 0 0 1rem;
  font-size: 1.08rem;
  font-weight: 700;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.label {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.input-file {
  padding: 0.7rem 0.85rem;
  font-size: 0.9rem;
  color: var(--text);
  border: 1px dashed var(--border);
  border-radius: 10px;
  background: #fcfdff;
}

.textarea {
  width: 100%;
  padding: 0.75rem 0.85rem;
  font-family: ui-monospace, "Cascadia Code", "SFMono-Regular", Menlo, monospace;
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--text);
  background: #fbfdff;
  border: 1px solid var(--border);
  border-radius: 10px;
  resize: vertical;
  min-height: 200px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
}

.actions--spaced {
  margin-bottom: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.62rem 1.12rem;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease, opacity 0.15s ease, transform 0.1s ease;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 16px rgba(47, 111, 221, 0.28);
}

.btn--primary:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn--secondary {
  background: #f4f8ff;
  color: var(--text);
  border-color: var(--border);
}

.btn--secondary:hover:not(:disabled) {
  background: #ecf3ff;
  border-color: #b9c8e4;
}

.status {
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  box-shadow: var(--shadow-sm);
}

.status--loading {
  border-color: var(--accent);
  color: #365889;
  background: #f4f8ff;
}

.status--error {
  border-color: color-mix(in srgb, var(--danger) 45%, var(--border));
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 8%, transparent);
}

.status--ok {
  border-color: color-mix(in srgb, var(--ok) 45%, var(--border));
  color: var(--ok);
  background: color-mix(in srgb, var(--ok) 8%, #ffffff);
}

.result-summary {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
}

.warnings {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
  color: #5f6d86;
  font-size: 0.85rem;
}

.warnings li {
  margin-bottom: 0.25rem;
}

.footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.footer__hint {
  font-size: 0.8rem;
  color: var(--muted);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

code {
  font-family: ui-monospace, Menlo, monospace;
  font-size: 0.85em;
}