:root {
  --bg: #0f1219;
  --surface: #171b24;
  --border: #2a3142;
  --text: #e8eaef;
  --muted: #8b93a7;
  --accent: #5b8def;
  --accent-dim: #3d6ec9;
  --danger: #e85d6c;
  --radius: 12px;
  --font: "DM Sans", system-ui, -apple-system, sans-serif;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(1200px 600px at 10% -10%, #1a2440 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #1a3028 0%, transparent 50%), var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: 560px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

header {
  margin-bottom: 2rem;
}
header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
}
header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-top {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.drop {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2.25rem 1.25rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.drop:hover,
.drop.dragover {
  border-color: var(--accent);
  background: rgba(91, 141, 239, 0.06);
}
.drop p {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}
.drop strong {
  color: var(--text);
}

input[type="file"] {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.15rem;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-dim);
}
.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover:not(:disabled) {
  color: var(--text);
  border-color: var(--muted);
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-top: 1.25rem;
}

.status {
  margin-top: 1rem;
  font-size: 0.9rem;
  min-height: 1.35em;
}
.status.err {
  color: var(--danger);
}
.status.ok {
  color: #6bc98a;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.field {
  margin-bottom: 1.1rem;
}
input[type="number"],
input[type="password"],
input[type="text"] {
  width: 100%;
  max-width: 280px;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
}
input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--accent);
}
.check-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.check-row label {
  margin: 0;
  color: var(--text);
  font-size: 0.95rem;
}

.hint {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.35rem;
}

footer {
  margin-top: 2rem;
  font-size: 0.8rem;
  color: var(--muted);
}