/* ============================================================
   Network Toolbox - Dark Theme First CSS
   Inspired by Vercel / Linear design systems
   ============================================================ */

/* --- 1. CSS Variables -------------------------------------- */
:root {
  --bg: #0f172a;
  --bg-alt: #0c1322;
  --surface: #1e293b;
  --card: #1e293b;
  --card-hover: #253347;
  --border: #334155;
  --border-light: #475569;
  --text: #e2e8f0;
  --text2: #94a3b8;
  --text3: #64748b;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-glow: rgba(59, 130, 246, 0.25);
  --green: #22c55e;
  --green-bg: rgba(34, 197, 94, 0.12);
  --green-text: #4ade80;
  --red: #ef4444;
  --red-bg: rgba(239, 68, 68, 0.12);
  --red-text: #f87171;
  --yellow: #eab308;
  --yellow-bg: rgba(234, 179, 8, 0.12);
  --yellow-text: #facc15;
  --orange: #f97316;
  --orange-bg: rgba(249, 115, 22, 0.12);
  --orange-text: #fb923c;
  --purple: #8b5cf6;
  --purple-bg: rgba(139, 92, 246, 0.12);
  --purple-text: #a78bfa;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.4), 0 4px 8px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 20px var(--primary-glow);
  --transition: 0.2s ease;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
  --header-h: 64px;
  --container: 1200px;
  --nav-bg: rgba(15, 23, 42, 0.8);
}

html.light {
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --surface: #f1f5f9;
  --card: #ffffff;
  --card-hover: #f1f5f9;
  --border: #e2e8f0;
  --border-light: #cbd5e1;
  --text: #0f172a;
  --text2: #475569;
  --text3: #94a3b8;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.1), 0 4px 8px rgba(0,0,0,0.06);
  --nav-bg: rgba(255, 255, 255, 0.8);
  --green-bg: rgba(34, 197, 94, 0.08);
  --red-bg: rgba(239, 68, 68, 0.08);
  --yellow-bg: rgba(234, 179, 8, 0.08);
  --orange-bg: rgba(249, 115, 22, 0.08);
  --purple-bg: rgba(139, 92, 246, 0.08);
}

/* --- 2. Reset + Base --------------------------------------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--primary-hover);
}

img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; }
code, pre { font-family: var(--font-mono); }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- 3. Header --------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: var(--nav-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.logo svg, .logo img {
  width: 28px;
  height: 28px;
}

.nav-pills {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 9999px;
  padding: 4px;
}
.nav-pills a {
  padding: 6px 16px;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text2);
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-pills a:hover,
.nav-pills a.active {
  color: var(--text);
  background: var(--card-hover);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text2);
  transition: all var(--transition);
  font-size: 1rem;
}
.btn-icon:hover {
  color: var(--text);
  border-color: var(--border-light);
  background: var(--card-hover);
}
.btn-icon svg { width: 18px; height: 18px; }

.btn-run {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--primary);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all var(--transition);
  position: relative;
}
.btn-run:hover {
  background: var(--primary-hover);
  box-shadow: var(--shadow-glow);
}
.btn-run.running {
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 var(--primary-glow); }
  50% { box-shadow: 0 0 20px 4px var(--primary-glow); }
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- 4. Hero ----------------------------------------------- */
.hero {
  text-align: center;
  padding: 80px 0 48px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  margin-bottom: 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text2);
  font-size: 0.82rem;
  font-weight: 600;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--primary), var(--purple), var(--primary));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 6s ease infinite;
}

@keyframes gradient-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text2);
  max-width: 600px;
  margin: 0 auto 32px;
}

.ip-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 500px;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
}

.ip-card .ip-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.ip-card .ip-location {
  color: var(--text2);
  font-size: 0.95rem;
}

/* Skeleton loading shimmer */
.skeleton {
  position: relative;
  overflow: hidden;
  background: var(--surface) !important;
  border-radius: var(--radius-sm);
  color: transparent !important;
  -webkit-text-fill-color: transparent !important;
  user-select: none;
  pointer-events: none;
}
.skeleton * { visibility: hidden; }
.skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.04) 40%,
    rgba(255, 255, 255, 0.08) 50%,
    rgba(255, 255, 255, 0.04) 60%,
    transparent 100%
  );
  animation: shimmer 1.5s ease-in-out infinite;
}

html.light .skeleton::after {
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(0, 0, 0, 0.04) 40%,
    rgba(0, 0, 0, 0.08) 50%,
    rgba(0, 0, 0, 0.04) 60%,
    transparent 100%
  );
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* --- 5. Feature Cards Grid --------------------------------- */
.features {
  padding: 48px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.3s ease;
  cursor: pointer;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-light);
  box-shadow: var(--shadow-lg);
}

.feature-card .icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text2);
  line-height: 1.5;
}

/* --- 6. Progress Bar --------------------------------------- */
.progress {
  width: 100%;
  height: 6px;
  background: var(--surface);
  border-radius: 9999px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  border-radius: 9999px;
  background: var(--primary);
  transition: width 0.6s ease;
  min-width: 0;
}
.progress-bar.fast { background: var(--green); }
.progress-bar.medium { background: var(--yellow); }
.progress-bar.slow { background: var(--red); }
.progress-bar.timeout { background: var(--text3); }

/* --- 7. Section Panels ------------------------------------- */
.section {
  padding: 32px 0;
  animation: fadeIn 0.4s ease both;
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.section-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.panel-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}
.badge-ok { background: var(--green-bg); color: var(--green-text); }
.badge-ok::before { background: var(--green); }
.badge-err { background: var(--red-bg); color: var(--red-text); }
.badge-err::before { background: var(--red); }
.badge-warn { background: var(--yellow-bg); color: var(--yellow-text); }
.badge-warn::before { background: var(--yellow); }
.badge-loading { background: var(--purple-bg); color: var(--purple-text); }
.badge-loading::before { background: var(--purple); animation: blink 1s step-end infinite; }

@keyframes blink {
  50% { opacity: 0; }
}

.panel-body {
  padding: 20px 24px;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.detail-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.detail-label {
  font-size: 0.8rem;
  color: var(--text3);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.detail-value {
  font-size: 0.95rem;
  color: var(--text);
  font-weight: 500;
  word-break: break-all;
}
.detail-value.mono {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

/* --- 8. Latency Table -------------------------------------- */
.latency-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.latency-row:last-child { border-bottom: none; }
.latency-row:hover { background: var(--card-hover); }

.latency-row .service-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  background: var(--surface);
  flex-shrink: 0;
}

.latency-row .service-name {
  width: 140px;
  font-size: 0.875rem;
  font-weight: 500;
  flex-shrink: 0;
}

.latency-row .progress {
  flex: 1;
  min-width: 80px;
}

.latency-row .latency-value {
  width: 70px;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  flex-shrink: 0;
}
.latency-row .latency-value.fast { color: var(--green-text); }
.latency-row .latency-value.medium { color: var(--yellow-text); }
.latency-row .latency-value.slow { color: var(--red-text); }
.latency-row .latency-value.timeout { color: var(--text3); }

.latency-row .status-icon {
  width: 24px;
  text-align: center;
  font-size: 1rem;
  flex-shrink: 0;
}

/* --- 9. DNS Table ------------------------------------------- */
.dns-row {
  display: grid;
  grid-template-columns: 2fr 3fr 100px 80px;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}
.dns-row:last-child { border-bottom: none; }
.dns-row:hover { background: var(--card-hover); }

.dns-row .domain {
  font-weight: 600;
  color: var(--text);
}
.dns-row .ips {
  font-family: var(--font-mono);
  color: var(--text2);
  font-size: 0.8rem;
  word-break: break-all;
}
.dns-row .time {
  text-align: right;
  font-family: var(--font-mono);
  color: var(--text3);
}
.dns-row .status {
  text-align: center;
}

/* --- 10. Leak Detection Grid -------------------------------- */
.leak-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding: 20px 24px;
}

.leak-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
}
.leak-card h4 {
  font-size: 0.95rem;
  margin-bottom: 8px;
  color: var(--text);
}
.leak-card p {
  font-size: 0.825rem;
  color: var(--text2);
  margin-bottom: 12px;
}

.result-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.result-safe { background: var(--green-bg); color: var(--green-text); }
.result-warn { background: var(--yellow-bg); color: var(--yellow-text); }
.result-danger { background: var(--red-bg); color: var(--red-text); }

/* --- 11. Fingerprint Table ---------------------------------- */
.fp-table {
  padding: 0;
}
.fp-row {
  display: flex;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}
.fp-row:last-child { border-bottom: none; }
.fp-row:hover { background: var(--card-hover); }
.fp-row .fp-label {
  width: 200px;
  padding: 12px 24px;
  color: var(--text3);
  font-weight: 500;
  flex-shrink: 0;
}
.fp-row .fp-value {
  flex: 1;
  padding: 12px 24px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.825rem;
  word-break: break-all;
}

/* --- 12. Summary Box ---------------------------------------- */
.summary-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}

.summary-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}
.summary-row:last-of-type { border-bottom: none; }
.summary-row .label {
  color: var(--text3);
  font-weight: 500;
}
.summary-row .value {
  color: var(--text);
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 0.825rem;
}

.copy-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text2);
  font-size: 0.8rem;
  font-weight: 500;
  transition: all var(--transition);
}
.copy-btn:hover {
  color: var(--text);
  border-color: var(--border-light);
  background: var(--card-hover);
}
.copy-btn.copied {
  color: var(--green-text);
  border-color: var(--green);
}

/* --- 13. Cards ---------------------------------------------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}
.card:hover {
  border-color: var(--border-light);
}

/* --- 14. Status Components ---------------------------------- */
.status-box {
  display: block;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  max-width: 100%;
  overflow-x: auto;
}
.status-box.loading {
  background: var(--purple-bg);
  color: var(--purple-text);
}
.status-box.ok {
  background: var(--green-bg);
  color: var(--green-text);
}
.status-box.err {
  background: var(--red-bg);
  color: var(--red-text);
}
.status-box.warn {
  background: var(--yellow-bg);
  color: var(--yellow-text);
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-bar {
  width: 100%;
  height: 4px;
  background: var(--surface);
  border-radius: 9999px;
  overflow: hidden;
  margin: 8px 0;
}
.loading-bar-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 9999px;
  transition: width .3s;
  width: 0%;
}
.loading-bar::after {
  content: '';
  display: block;
  width: 40%;
  height: 100%;
  background: var(--primary);
  border-radius: 9999px;
  animation: loading-slide 1.2s ease-in-out infinite;
}

@keyframes loading-slide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

/* --- 15. Tags ----------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
}
.tag-green { background: var(--green-bg); color: var(--green-text); }
.tag-red { background: var(--red-bg); color: var(--red-text); }
.tag-yellow { background: var(--yellow-bg); color: var(--yellow-text); }
.tag-blue { background: rgba(59,130,246,0.12); color: #60a5fa; }
.tag-orange { background: var(--orange-bg); color: var(--orange-text); }
.tag-purple { background: var(--purple-bg); color: var(--purple-text); }
.tag-ok,
.tag-info { background: var(--green-bg); color: var(--green-text); }
.tag-fail { background: var(--red-bg); color: var(--red-text); }
.tag-warn { background: var(--yellow-bg); color: var(--yellow-text); }

/* --- 16. Score Circle --------------------------------------- */
.score-circle {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  font-weight: 800;
  margin: 0 auto 12px;
  position: relative;
}
.score-circle::after {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--card);
}
.score-circle span {
  position: relative;
  z-index: 1;
}
.score-circle.low {
  background: conic-gradient(var(--green) 0%, var(--green) var(--pct), var(--border) var(--pct));
  color: var(--green-text);
}
.score-circle.mid {
  background: conic-gradient(var(--yellow) 0%, var(--yellow) var(--pct), var(--border) var(--pct));
  color: var(--yellow-text);
}
.score-circle.high {
  background: conic-gradient(var(--red) 0%, var(--red) var(--pct), var(--border) var(--pct));
  color: var(--red-text);
}

.score-label {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text2);
  font-weight: 500;
}

/* --- 17. Metric Cards --------------------------------------- */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
}

.metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 16px;
  text-align: center;
}
.metric-card .metric-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 4px;
}
.metric-card .metric-label {
  font-size: 0.8rem;
  color: var(--text3);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* --- 18. Tables --------------------------------------------- */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.table-wrap th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.table-wrap td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}

.table-wrap tr:last-child td { border-bottom: none; }
.table-wrap tr:hover td { background: var(--card-hover); }

.table-wrap .mono {
  font-family: var(--font-mono);
  font-size: 0.825rem;
}

.result-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.result-table th,
.result-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.result-table th {
  color: var(--text2);
  background: var(--surface);
  font-size: 0.78rem;
  font-weight: 700;
}

.result-table tr:last-child td {
  border-bottom: 0;
}

.status-error { border-color: var(--red); color: var(--red-text); }
.status-loading { border-color: var(--purple); color: var(--purple-text); }
.status-warn { border-color: var(--yellow); color: var(--yellow-text); }
.status-ok { border-color: var(--green); color: var(--green-text); }
.toast.fade-out { opacity: 0; transform: translateY(8px); }

/* --- 19. Inputs --------------------------------------------- */
input[type="text"],
input[type="url"],
input[type="email"],
input[type="search"],
select,
textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.875rem;
  transition: all var(--transition);
  outline: none;
}
input::placeholder,
textarea::placeholder {
  color: var(--text3);
}
input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}
select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

.input-group {
  display: flex;
  gap: 8px;
}
.input-group input,
.input-group select {
  flex: 1;
}

/* --- 20. Buttons -------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  user-select: none;
}
.btn:hover {
  border-color: var(--border-light);
  background: var(--card-hover);
}
.btn:active {
  transform: scale(0.97);
}
.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  box-shadow: var(--shadow-glow);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
}
.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

/* --- 21. Toast Notifications -------------------------------- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  color: var(--text);
  pointer-events: auto;
  animation: toast-in 0.35s ease both;
  min-width: 280px;
  max-width: 420px;
}
.toast.removing {
  animation: toast-out 0.3s ease both;
}
.toast-success { border-left: 3px solid var(--green); }
.toast-error { border-left: 3px solid var(--red); }
.toast-warning { border-left: 3px solid var(--yellow); }
.toast-info { border-left: 3px solid var(--primary); }

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(40px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}
@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateX(40px) scale(0.96);
  }
}

/* --- Extra utilities --------------------------------------- */

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

.metric { text-align: center; padding: 16px; }
.metric-value { font-size: 2rem; font-weight: 800; font-family: var(--mono); }
.metric-label { font-size: .8rem; color: var(--text-secondary); margin-top: 4px; }
.metric-value.green { color: var(--green); }
.metric-value.yellow { color: var(--yellow); }
.metric-value.red { color: var(--red); }

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}
.tool-card { transition: box-shadow var(--transition-md), transform var(--transition-md); }
.tool-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

footer {
  text-align: center;
  padding: 24px 0;
  color: var(--text-muted);
  font-size: .8rem;
  border-top: 1px solid var(--border);
  margin-top: 48px;
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

@media(max-width:768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .tools-grid { grid-template-columns: 1fr; }
  .metric-value { font-size: 1.5rem; }
}

/* --- 22. Footer --------------------------------------------- */
.footer {
  padding: 32px 0;
  margin-top: 48px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.825rem;
  color: var(--text3);
}
.footer a {
  color: var(--text2);
}
.footer a:hover {
  color: var(--primary);
}

/* --- 23. Responsive ----------------------------------------- */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .leak-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .dns-row {
    grid-template-columns: 1.5fr 2.5fr 80px 60px;
  }
}

@media (max-width: 768px) {
  :root { --header-h: 56px; }

  .nav-pills {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg);
    border: none;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
    padding: 16px 24px;
    gap: 4px;
    z-index: 99;
  }
  .nav-pills.open {
    display: flex;
  }
  .nav-pills a {
    padding: 10px 16px;
    border-radius: var(--radius-sm);
  }

  .hamburger {
    display: flex;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .leak-grid {
    grid-template-columns: 1fr;
  }

  .detail-grid {
    grid-template-columns: 1fr 1fr;
  }

  .dns-row {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 14px 24px;
  }

  .fp-row {
    flex-direction: column;
    gap: 0;
  }
  .fp-row .fp-label {
    width: auto;
    padding-bottom: 2px;
  }
  .fp-row .fp-value {
    padding-top: 2px;
    padding-bottom: 12px;
  }

  .latency-row {
    flex-wrap: wrap;
    gap: 8px;
  }
  .latency-row .progress {
    order: 10;
    width: 100%;
    flex: auto;
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    padding: 48px 0 32px;
  }
  .hero-title {
    font-size: 1.75rem;
  }

  .ip-card { padding: 24px; }
  .ip-card .ip-value { font-size: 1.5rem; }

  .summary-box { position: static; }
  .copy-btn { position: static; margin-top: 12px; }

  .toast-container {
    bottom: 16px;
    right: 16px;
    left: 16px;
  }
  .toast { min-width: auto; max-width: 100%; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .features-grid { grid-template-columns: 1fr; }
  .leak-grid { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: 1fr; }

  .panel-header { padding: 16px; flex-wrap: wrap; gap: 8px; }
  .panel-body { padding: 16px; }

  .header .container {
    gap: 8px;
  }

  .header-actions {
    gap: 4px;
  }

  .btn-run {
    padding: 8px 10px;
  }

  .btn-run span {
    display: none;
  }

  .score-circle { width: 80px; height: 80px; font-size: 1.4rem; }

  .result-table {
    min-width: 100%;
    table-layout: fixed;
  }

  .result-table th,
  .result-table td {
    padding: 8px;
    word-break: break-word;
  }
}

/* --- 24. Animations ----------------------------------------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fadeIn 0.5s ease both;
}

.animate-in-delay-1 { animation-delay: 0.1s; }
.animate-in-delay-2 { animation-delay: 0.2s; }
.animate-in-delay-3 { animation-delay: 0.3s; }
.animate-in-delay-4 { animation-delay: 0.4s; }

/* --- 25. IP Property Tags ----------------------------------- */
.tag-dc {
  background: rgba(59, 130, 246, 0.12);
  color: #60a5fa;
}
.tag-proxy {
  background: var(--red-bg);
  color: var(--red-text);
}
.tag-mobile {
  background: var(--yellow-bg);
  color: var(--yellow-text);
}
.tag-residential {
  background: var(--green-bg);
  color: var(--green-text);
}
.tag-vpn {
  background: var(--orange-bg);
  color: var(--orange-text);
}
.tag-tor {
  background: var(--purple-bg);
  color: var(--purple-text);
}

/* --- 26. Geo Sources Table ---------------------------------- */
.geo-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.geo-table th {
  padding: 10px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.geo-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.geo-table tr:last-child td { border-bottom: none; }
.geo-table tr:hover td { background: var(--card-hover); }
.geo-table .source {
  font-weight: 500;
  color: var(--text);
}
.geo-table .location {
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: var(--text2);
}

/* --- Utility Classes ---------------------------------------- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text2); }
.text-mono { font-family: var(--font-mono); }
.font-bold { font-weight: 700; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.gap-sm { gap: 8px; }
.gap-md { gap: 16px; }
.gap-lg { gap: 24px; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.hidden { display: none !important; }
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}