:root, [data-theme="light"] {
  --bg: #ffffff;
  --panel-bg: #f6f8fa;
  --border: #d0d7de;
  --text: #24292f;
  --text-muted: #57606a;
  --accent: #1a7f37;
  --radius: 6px;
}

[data-theme="dark"] {
  --bg: #0d1117;
  --panel-bg: #161b22;
  --border: #30363d;
  --text: #c9d1d9;
  --text-muted: #8b949e;
  --accent: #238636;
  --radius: 6px;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'JetBrains Mono', monospace; }
body { background: var(--bg); color: var(--text); padding: 40px 20px; display: flex; justify-content: center; }
.app-container { width: 100%; max-width: 650px; display: flex; flex-direction: column; gap: 24px; }
.navbar { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--border); padding-bottom: 14px; }
.logo { font-size: 1.15rem; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.header-controls { display: flex; gap: 8px; align-items: center; }
.theme-btn, .lang-select { background: var(--panel-bg); color: var(--text); border: 1px solid var(--border); border-radius: var(--radius); padding: 5px 10px; font-size: 0.8rem; outline: none; cursor: pointer; display: flex; align-items: center; }

.main-card { border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel-bg); padding: 24px; display: flex; flex-direction: column; gap: 20px; }
.hero-header h1 { font-size: 1.2rem; margin-bottom: 4px; }
.hero-header p { font-size: 0.85rem; color: var(--text-muted); }

.ip-display-box { border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg); padding: 20px; display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center; }
.ip-label { font-size: 0.75rem; color: var(--text-muted); letter-spacing: 1px; }
.ip-value { font-size: 1.8rem; color: var(--accent); }

.metrics-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.metric-box { border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg); padding: 12px; display: flex; flex-direction: column; gap: 4px; }
.metric-lbl { font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; }
.metric-val { font-size: 0.95rem; word-break: break-all; }

.privacy-card { border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg); padding: 16px; display: flex; flex-direction: column; gap: 6px; }
.privacy-text h3 { font-size: 0.9rem; font-weight: 700; color: var(--text); }
.privacy-text p { font-size: 0.82rem; color: var(--text-muted); line-height: 1.4; }

.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; font-size: 0.85rem; font-weight: 600; border-radius: var(--radius); border: 1px solid var(--border); background: var(--panel-bg); color: var(--text); cursor: pointer; }
.btn:hover { background: var(--border); }

.ads-container { width: 100%; min-height: 90px; background: var(--panel-bg); border: 1px dashed var(--border); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; }
.footer { text-align: center; font-size: 0.78rem; color: var(--text-muted); padding: 15px 0; border-top: 1px solid var(--border); }

/* Mobile Responsive */
@media (max-width: 600px) {
  body { padding: 16px 12px; }
  .main-card { padding: 16px; }
  .metrics-grid { grid-template-columns: 1fr; }
  .ip-value { font-size: 1.4rem; }
}