* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0a0c10;
  --surface: rgba(22, 27, 40, 0.7);
  --surface-solid: #161b28;
  --surface-hover: #1e2538;
  --border: rgba(56, 68, 100, 0.4);
  --border-glow: rgba(59, 130, 246, 0.3);
  --text: #e4e4e7;
  --text-muted: #7a8299;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --gradient-1: #3b82f6;
  --gradient-2: #8b5cf6;
  --gradient-3: #06b6d4;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(139, 92, 246, 0.05), transparent);
}

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

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

/* Navigation */
header {
  background: rgba(15, 17, 23, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.3rem;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  position: relative;
  padding-bottom: 4px;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gradient-1), var(--gradient-2));
  border-radius: 1px;
  transition: width 0.3s ease;
}

nav a:hover::after, nav a.active::after {
  width: 100%;
}

nav a:hover, nav a.active {
  color: var(--text);
}

/* Main */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem;
  flex: 1;
  width: 100%;
}

.section {
  margin-bottom: 3rem;
  animation: fadeInUp 0.6s ease both;
}

.section:nth-child(2) { animation-delay: 0.1s; }
.section:nth-child(3) { animation-delay: 0.2s; }

h1 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--text);
  font-weight: 600;
}

/* Glass Card Mixin */
.glass-card {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: all 0.3s ease;
}

.glass-card:hover {
  border-color: var(--border-glow);
  box-shadow: 0 0 20px var(--accent-glow), 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* IP-Anzeige */
.ip-display {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 3rem;
  text-align: center;
  margin-bottom: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.ip-display::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gradient-1), var(--gradient-2), transparent);
  opacity: 0.6;
}

.ip-display:hover {
  border-color: var(--border-glow);
  box-shadow: 0 0 30px var(--accent-glow), 0 8px 32px rgba(0, 0, 0, 0.3);
}

.ip-text {
  font-size: 2.8rem;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.detail-card {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.detail-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
}

.detail-card:hover {
  border-color: var(--border-glow);
  box-shadow: 0 0 15px var(--accent-glow);
  transform: translateY(-2px);
}

.detail-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 1.5px;
  font-weight: 600;
}

.detail-value {
  font-size: 1.05rem;
  font-weight: 500;
  word-break: break-all;
}

/* DNS Lookup */
.dns-form {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.dns-form input {
  flex: 1;
  min-width: 250px;
  padding: 0.75rem 1rem;
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: all 0.3s ease;
}

.dns-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow), 0 0 15px var(--accent-glow);
}

.dns-form select {
  padding: 0.75rem 1rem;
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 1rem;
  cursor: pointer;
  outline: none;
  transition: all 0.3s ease;
}

.dns-form select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.dns-form button, .speedtest-btn {
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
  position: relative;
  overflow: hidden;
}

.dns-form button::before, .speedtest-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.dns-form button:hover, .speedtest-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4), 0 0 40px rgba(59, 130, 246, 0.1);
}

.dns-form button:hover::before, .speedtest-btn:hover::before {
  opacity: 1;
}

.dns-form button:active, .speedtest-btn:active {
  transform: translateY(0);
}

.dns-results {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}

.dns-results::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gradient-2), transparent);
  opacity: 0.5;
}

.dns-results h3 {
  margin-bottom: 1rem;
  font-size: 1rem;
  color: var(--text-muted);
}

.dns-results table {
  width: 100%;
  border-collapse: collapse;
}

.dns-results th, .dns-results td {
  text-align: left;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

.dns-results th {
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 1px;
}

.dns-results td {
  font-family: 'Courier New', monospace;
  word-break: break-all;
}

.dns-results tr {
  transition: background 0.2s ease;
}

.dns-results tbody tr:hover {
  background: rgba(59, 130, 246, 0.05);
}

/* Speedtest */
.speedtest-container {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.speedtest-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gradient-3), var(--gradient-1), transparent);
  opacity: 0.6;
}

.speedtest-container:hover {
  border-color: var(--border-glow);
  box-shadow: 0 0 25px var(--accent-glow), 0 8px 32px rgba(0, 0, 0, 0.3);
}

.speedtest-gauges {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.gauge-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 1.5rem 1rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.gauge-card:hover {
  background: rgba(59, 130, 246, 0.05);
  border-color: var(--border);
}

.gauge-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 2px;
  font-weight: 600;
}

.gauge-value {
  font-size: 2.8rem;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  line-height: 1.2;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: all 0.3s ease;
}

.gauge-card:nth-child(2) .gauge-value {
  background: linear-gradient(135deg, #10b981, #06b6d4);
  -webkit-background-clip: text;
  background-clip: text;
}

.gauge-card:nth-child(3) .gauge-value {
  background: linear-gradient(135deg, var(--gradient-2), #ec4899);
  -webkit-background-clip: text;
  background-clip: text;
}

.gauge-unit {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.speedtest-progress-wrap {
  margin-bottom: 1.5rem;
}

.speedtest-progress-bar {
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.speedtest-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--gradient-1), var(--gradient-2), var(--gradient-3));
  background-size: 200% 100%;
  border-radius: 2px;
  transition: width 0.3s ease;
  animation: gradient-shift 2s ease infinite;
}

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

.speedtest-btn {
  padding: 0.85rem 3rem;
  font-size: 1.05rem;
}

.speedtest-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.hidden {
  display: none;
}

/* Legal Pages */
.legal-page {
  max-width: 800px;
}

.legal-page h2 {
  font-size: 1.15rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.legal-page p,
.legal-page li {
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 0.5rem;
}

.legal-page ul {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

/* Footer */
footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  background: rgba(15, 17, 23, 0.5);
}

.legal-links {
  margin-top: 0.5rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.legal-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.8rem;
  transition: color 0.2s ease;
}

.legal-links a:hover {
  color: var(--accent);
}

/* Kontaktformular */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: 600px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  padding: 0.75rem 1rem;
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: all 0.3s ease;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow), 0 0 15px var(--accent-glow);
}

.contact-status {
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-size: 0.95rem;
}

.contact-status.success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #10b981;
}

.contact-status.error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #ef4444;
}

/* Responsive */
@media (max-width: 600px) {
  .ip-text { font-size: 1.8rem; }
  .gauge-value { font-size: 2rem; }
  .speedtest-gauges { grid-template-columns: 1fr; gap: 1rem; }
  nav { padding: 0.8rem 1rem; }
  main { padding: 1.5rem 1rem; }
  nav ul { gap: 1rem; }
  nav a { font-size: 0.85rem; }
}