:root {
  --accent: #2563eb;
  --accent-dark: #1e40af;
  --bg: #f5f7fa;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --success-bg: #ecfdf5;
  --success-border: #6ee7b7;
  --error-bg: #fef2f2;
  --error-border: #fca5a5;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
}

.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

h1 {
  font-size: 1.6rem;
  margin-bottom: 4px;
}

.subtitle {
  color: var(--text-muted);
  margin-top: 0;
  margin-bottom: 28px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
  margin-top: 18px;
}

label:first-of-type { margin-top: 0; }

input[type="text"], input[type="number"], input[type="file"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  background: #fff;
}

.hint {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 4px;
}

button, .btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 12px 22px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 22px;
  text-decoration: none;
}

button:hover, .btn:hover { background: var(--accent-dark); }

.btn-secondary {
  background: #fff;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-secondary:hover { background: #eff6ff; }

.alert {
  padding: 14px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 0.9rem;
}
.alert-error {
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  color: #991b1b;
}
.alert-success {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: #065f46;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}
th { color: var(--text-muted); font-weight: 600; }
tr:hover td { background: #fafbfc; }

.badge {
  display: inline-block;
  background: #eff6ff;
  color: var(--accent-dark);
  font-family: monospace;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.85rem;
}

.muted { color: var(--text-muted); font-size: 0.85rem; }

.preview-scroll {
  overflow-x: auto;
  max-height: 320px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}