@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100..900;1,100..900&display=swap');

:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --text-muted: #64748b;
  --primary: #0054b9;
  --primary-hover: #1f52e0;
  --success: #1DB954;
  --success-hover: #0bda54;
  --secondary: #475569;
  --secondary-hover: #334155;
  --border: #e2e8f0;
  --error: #dc2626;
  --error-bg: #fee2e2;
  --success-bg: #dcfce7;
  --warning: #d97706;
  --radius: 8px;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Roboto", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 2rem 1rem;
}

.container {
  max-width: 680px;
  width: 100%;
}

header { text-align: center; margin-bottom: 2rem; }
header h1 { font-size: 1.8rem; margin-bottom: 0.25rem; }
.subtitle { color: var(--text-muted); font-size: 0.95rem; }

.step { background: var(--card); padding: 1.5rem; border-radius: var(--radius); box-shadow: var(--shadow); }
.step.hidden { display: none; }

.form-group { margin-bottom: 1.25rem; }
label { display: block; font-weight: 500; margin-bottom: 0.4rem; font-size: 0.9rem; }
input[type="text"], input[type="password"] {
  width: 100%; padding: 0.75rem; border: 1px solid var(--border);
  border-radius: var(--radius); font-size: 1rem; transition: border-color 0.2s;
}
input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1); }

.checkbox-group { display: flex; align-items: flex-start; gap: 0.5rem; }
.checkbox-group input { margin-top: 0.25rem; }
.checkbox-group label { font-size: 0.85rem; color: var(--text-muted); font-weight: normal; }

.btn {
  display: inline-block; padding: 0.75rem 1.5rem; border: none; border-radius: var(--radius);
  font-weight: 500; cursor: pointer; transition: all 0.2s; font-size: 0.95rem; width: 100%;
}
.btn.primary { background: var(--primary); color: white; }
.btn.primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn.success { background: var(--success); color: white; }
.btn.success:hover:not(:disabled) { background: var(--success-hover); }
.btn.secondary { background: var(--secondary); color: white; margin-top: 1rem; }
.btn.secondary:hover { background: var(--secondary-hover); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.msg { margin-top: 1rem; padding: 0.75rem; border-radius: var(--radius); font-size: 0.9rem; }
.msg.error { background: var(--error-bg); color: var(--error); border: 1px solid var(--error); }
.msg.success { background: var(--success-bg); color: var(--success); border: 1px solid #4ade80; }
.msg.hidden { display: none; }

.status-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.25rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border); }
.status-verified { color: var(--success); font-weight: 500; }
.badge { padding: 0.25rem 0.6rem; border-radius: 99px; font-size: 0.8rem; background: #e0f2fe; color: #0369a1; font-weight: 500; }

.meta-info { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 0.75rem; margin-bottom: 1.25rem; font-size: 0.9rem; color: var(--text-muted); }
.meta-info strong { color: var(--text); }

.table-container { overflow-x: auto; margin-bottom: 1rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--border); }
th { background: #f1f5f9; font-weight: 600; }
.port-open .badge { background: #dcfce7; color: #16a34a; }
.port-closed .badge { background: #f1f5f9; color: #64748b; }
.port-filtered .badge { background: #fef3c7; color: #d97706; }

#loading-overlay {
  position: fixed; inset: 0; background: rgba(255,255,255,0.9);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  z-index: 1000; backdrop-filter: blur(2px);
}
#loading-overlay.hidden { display: none; }
.spinner {
  width: 40px; height: 40px; border: 4px solid var(--border);
  border-top-color: var(--primary); border-radius: 50%; animation: spin 1s linear infinite; margin-bottom: 1rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

footer { margin-top: 2rem; text-align: center; color: var(--text-muted); font-size: 0.8rem; border-top: 1px solid var(--border); padding-top: 1rem; }