:root {
  --background-color: #121212;
  --card-bg: #1e1e1e;
  --text-color: #e0e0e0;
  --secondary-text-color: #a0a0a0;
  --accent-color: #00ddb5;
  --accent-color-rgb: 0, 221, 181;
  --border-color: #333333;
  --error-color: #ff5252;
  --status-good: #4caf50;
  --status-moderate: #ffc107;
  --status-high: #f44336;
  --placeholder-bg: #1e1e1e;
  --placeholder-element-bg: #333;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: var(--accent-color);
  transition: color 0.2s ease;
}
a:hover {
  text-decoration: underline;
}

/* --- Single Page Layout --- */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  padding-top: 100px; /* Space for the sticky nav */
}

/* --- Top Navigation --- */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(30, 30, 30, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: box-shadow 0.2s ease-in-out;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-color);
}

.nav-links {
  display: flex;
  gap: 0.5rem;
}
.nav-links button {
  background: none;
  border: none;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--secondary-text-color);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-links button svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--secondary-text-color);
  transition: color 0.2s ease;
}

.nav-links button:hover {
  color: var(--text-color);
  background-color: rgba(255, 255, 255, 0.1);
}
.nav-links button:hover svg {
  color: var(--text-color);
}
.nav-links button.active {
  color: var(--accent-color);
  font-weight: 600;
}
.nav-links button.active svg {
    color: var(--accent-color);
}


/* --- Hero Header --- */
.hero-header {
  text-align: center;
  padding: 4rem 0 3rem 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 3rem;
}

.hero-header h1 {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--secondary-text-color);
  margin-bottom: 0.5rem;
}
.hero-ip {
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 700;
  font-family: 'Fira Code', 'Courier New', monospace;
  color: var(--text-color);
  margin-bottom: 1.5rem;
  word-break: break-all;
  text-shadow: 0 0 15px rgba(var(--accent-color-rgb), 0.2);
}

.hero-ip.hero-ip-clickable {
  cursor: pointer;
  transition: color 0.2s ease-in-out;
}

.hero-ip.hero-ip-clickable:hover {
  color: var(--accent-color);
}

.refresh-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-color);
  color: #fff;
  border: none;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
}

.refresh-btn:hover:not(:disabled) {
  background: #00bc9a;
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(var(--accent-color-rgb), 0.3);
}

.refresh-btn.loading {
  cursor: not-allowed;
  opacity: 0.7;
}

.refresh-btn.loading svg {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}


/* --- Content Sections --- */
.content-section {
  padding: 3rem 0;
  border-bottom: 1px solid var(--border-color);
}
.content-section:last-of-type {
    border-bottom: none;
}
.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--text-color);
  position: relative;
  padding-bottom: 0.5rem;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background-color: var(--accent-color);
  border-radius: 2px;
}

/* --- Overview --- */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
.ip-layout { display: flex; flex-direction: column; gap: 1rem; }
.ip-display-box {
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.3s ease;
  background-color: var(--card-bg);
}
.ip-display-box:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2), 0 0 15px rgba(var(--accent-color-rgb), 0.2);
    border-color: rgba(var(--accent-color-rgb), 0.5);
}

.ip-display-box.not-detected { opacity: 0.7; border-style: dashed; }
.ip-display-box.not-detected .ip-address { font-size: 1.1rem; font-weight: 500; color: var(--secondary-text-color); }
.ip-details { display: flex; flex-direction: column; gap: 0.25rem; overflow: hidden; }
.ip-version { font-size: 0.8rem; color: var(--secondary-text-color); font-weight: 500; text-transform: uppercase; letter-spacing: 0.5px; }
.ip-address { font-size: 1.5rem; font-weight: 600; color: var(--text-color); font-family: 'Fira Code', 'Courier New', monospace; word-break: break-all; }
.copy-btn { background: transparent; border: none; color: var(--secondary-text-color); cursor: pointer; padding: 0.5rem; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; transition: all 0.2s ease; flex-shrink: 0; }
.copy-btn:hover { background-color: rgba(255, 255, 255, 0.1); color: var(--text-color); }
.copy-btn svg { color: var(--accent-color); }
#map { height: 400px; border-radius: 12px; border: 1px solid var(--border-color); background-color: #1a1a1a; filter: grayscale(80%) brightness(80%); }
.leaflet-control-attribution, .leaflet-popup-content-wrapper, .leaflet-popup-tip { background: rgba(30,30,30,0.8) !important; color: var(--text-color) !important; box-shadow: 0 1px 5px rgba(0,0,0,0.5) !important; backdrop-filter: blur(5px); border: 1px solid var(--border-color); border-radius: 8px !important; }
.leaflet-control-attribution a { color: var(--accent-color) !important; }
.leaflet-popup-content b { color: var(--accent-color); }
.leaflet-control-zoom-in, .leaflet-control-zoom-out { background-color: var(--card-bg) !important; color: var(--text-color) !important; border-color: var(--border-color) !important; }

/* --- Details & System --- */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}
.info-row-link { color: inherit; text-decoration: none; }
.info-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    border-radius: 12px;
    transition: all 0.3s ease;
}
.info-row-clickable:hover { transform: translateY(-2px); border-color: rgba(var(--accent-color-rgb), 0.5); box-shadow: 0 0 15px rgba(var(--accent-color-rgb), 0.2); cursor: pointer; }
.info-icon { color: var(--accent-color); flex-shrink: 0; background: rgba(var(--accent-color-rgb), 0.1); border-radius: 50%; width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; }
.info-text { display: flex; flex-direction: column; gap: 0.2rem; overflow: hidden; }
.info-label { font-size: 0.85rem; font-weight: 500; color: var(--secondary-text-color); }
.info-value { font-size: 1rem; font-weight: 500; color: var(--text-color); word-break: break-word; }

/* --- Tools (Tabbed Interface) --- */
.tool-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.tool-tabs button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  border: none;
  color: var(--secondary-text-color);
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  border-bottom: 3px solid transparent;
  transition: all 0.2s ease;
  border-radius: 6px 6px 0 0;
}
.tool-tabs button:hover {
  color: var(--text-color);
  background-color: rgba(255, 255, 255, 0.05);
}
.tool-tabs button.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}
.tool-tabs button svg {
  width: 20px;
  height: 20px;
}

.tool-content {
  background-color: var(--card-bg);
  border-radius: 16px;
  padding: 2rem;
  border: 1px solid var(--border-color);
}
.tool-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
}
.tool-header { display: flex; flex-direction: column; align-items: center; gap: 0.75rem; color: var(--text-color); }
.tool-header h3 { font-size: 1.5rem; margin: 0; }
.tool-subtitle { font-size: 0.95rem; color: var(--secondary-text-color); font-weight: 400; margin-top: -1rem; max-width: 400px; }
.tool-btn { background-color: var(--accent-color); color: #fff; border: none; border-radius: 8px; padding: 0.75rem 1.5rem; font-size: 1rem; font-weight: 500; cursor: pointer; transition: all 0.3s ease; width: auto; min-width: 120px; }
.tool-btn:hover:not(:disabled) { background-color: #00bc9a; transform: translateY(-2px); box-shadow: 0 4px 15px rgba(var(--accent-color-rgb), 0.3); }
.tool-btn:disabled { background-color: var(--secondary-text-color); cursor: not-allowed; opacity: 0.7; }
.tool-error { color: var(--error-color); font-size: 0.9rem; width: 100%; text-align: center; margin-top: -0.5rem; }
.tool-input-group { display: flex; gap: 0.5rem; width: 100%; }
.tool-input-group input { flex-grow: 1; background-color: var(--background-color); border: 1px solid var(--border-color); color: var(--text-color); padding: 0.75rem 1rem; border-radius: 8px; font-size: 1rem; font-family: 'Fira Code', 'Courier New', monospace; transition: all 0.3s ease; min-width: 0; }
.tool-input-group input:focus { outline: none; border-color: var(--accent-color); box-shadow: 0 0 0 3px rgba(var(--accent-color-rgb), 0.3); }
.tool-input-group .tool-btn { flex-shrink: 0; }
.tool-results { margin-top: 0.5rem; width: 100%; background-color: var(--background-color); border-radius: 8px; padding: 0.5rem 1rem; border: 1px solid var(--border-color); max-height: 250px; overflow-y: auto; text-align: left; }
.tool-results pre { white-space: pre-wrap; word-break: break-all; font-size: 0.8rem; color: var(--secondary-text-color); font-family: 'Fira Code', 'Courier New', monospace; }

/* DNS Results */
.dns-results-container { padding: 0.5rem; }
.dns-record { display: grid; grid-template-columns: 60px 1fr 80px; gap: 1rem; padding: 0.75rem 0.5rem; border-bottom: 1px solid var(--border-color); align-items: center; font-family: 'Fira Code', 'Courier New', monospace; font-size: 0.85rem; }
.dns-record:last-child { border-bottom: none; }
.dns-record-type { font-weight: 700; color: var(--accent-color); text-align: center; background: rgba(var(--accent-color-rgb), 0.1); padding: 0.25rem 0; border-radius: 4px; font-size: 0.8rem; }
.dns-record-data { color: var(--text-color); word-break: break-all; }
.dns-record-ttl { color: var(--secondary-text-color); font-size: 0.75rem; text-align: right; }

/* WHOIS Results */
.whois-results-container {
    padding: 0.5rem;
    text-align: left;
    width: 100%;
    font-size: 0.9rem;
}
.whois-section {
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}
.whois-section:first-child {
    margin-top: 0;
    border-top: none;
    padding-top: 0;
}
.whois-section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 1rem;
}
.whois-kv-pair {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 1rem;
    padding: 0.6rem 0;
    align-items: start;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.whois-kv-pair:last-child {
    border-bottom: none;
}
.whois-key {
    font-weight: 500;
    color: var(--secondary-text-color);
    text-transform: capitalize;
    word-break: break-word;
}
.whois-value {
    color: var(--text-color);
    word-break: break-all;
}
.whois-list-item {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-color);
}
.whois-list-item:last-child {
    border-bottom: none;
}
.whois-contact {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}
.whois-contact:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}
.whois-contact-role {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 1rem;
    text-transform: capitalize;
}

/* Speed Test Gauge */
.gauge-display { display: flex; justify-content: center; align-items: center; }
.gauge-container { position: relative; width: 180px; height: 180px; }
.gauge { width: 100%; height: 100%; transform: rotate(-90deg); }
.gauge-bg, .gauge-fg { fill: none; stroke-width: 12; }
.gauge-bg { stroke: #333; transition: stroke-opacity 0.3s ease; }
.gauge-fg {
    stroke: var(--accent-color);
    stroke-linecap: round;
    transition: stroke 0.5s ease;
    filter: drop-shadow(0 0 5px rgba(var(--accent-color-rgb), 0.5));
}
.gauge-container.testing .gauge-bg {
    animation: pulse-gauge 2s infinite ease-in-out;
}
.gauge-text { position: absolute; top: 0; left: 0; width: 100%; height: 100%; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 0.25rem; }
.speed-value { font-size: 2.5rem; font-weight: 700; color: var(--text-color); font-family: 'Fira Code', 'Courier New', monospace; }
.speed-unit { font-size: 1rem; color: var(--secondary-text-color); font-weight: 500; }
.speed-value.testing-text {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--secondary-text-color);
    animation: pulse-text 2s infinite ease-in-out;
}
.gauge-tooltip {
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--background-color);
  color: var(--text-color);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-family: 'Fira Code', 'Courier New', monospace;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  pointer-events: none;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
  z-index: 10;
}
.gauge-container:hover .gauge-tooltip {
  opacity: 1;
  visibility: visible;
}


@keyframes pulse-gauge {
    0% { stroke-opacity: 1; }
    50% { stroke-opacity: 0.6; }
    100% { stroke-opacity: 1; }
}
@keyframes pulse-text {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

/* Ping Test */
.ping-results { list-style: none; width: 100%; display: flex; flex-direction: column; gap: 0.75rem; }
.ping-row { display: flex; justify-content: space-between; align-items: center; font-size: 1rem; padding: 0.75rem 0.5rem; border-bottom: 1px solid #333; }
.ping-results .ping-row:last-child { border-bottom: none; }
.ping-target { display: flex; align-items: center; gap: 0.75rem; color: var(--text-color); }
.ping-status-dot { width: 10px; height: 10px; border-radius: 50%; transition: background-color 0.3s ease; }
.ping-status-dot.pending { background-color: #666; }
.ping-status-dot.good { background-color: var(--status-good); box-shadow: 0 0 5px var(--status-good); }
.ping-status-dot.moderate { background-color: var(--status-moderate); box-shadow: 0 0 5px var(--status-moderate); }
.ping-status-dot.high { background-color: var(--status-high); box-shadow: 0 0 5px var(--status-high); }
.ping-status-dot.failed { background-color: var(--error-color); box-shadow: 0 0 5px var(--error-color); }
.ping-value { font-weight: 600; font-family: 'Fira Code', 'Courier New', monospace; color: var(--text-color); }
.ping-value.error { color: var(--error-color); }

/* Ping Test History */
.ping-history-section {
    width: 100%;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}
.ping-history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}
.ping-history-header h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-color);
}
.clear-history-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--secondary-text-color);
    padding: 0.3rem 0.8rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}
.clear-history-btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--secondary-text-color);
    color: var(--text-color);
}
.ping-history-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-height: 300px;
    overflow-y: auto;
    padding-right: 0.5rem;
}
.ping-history-item {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
}
.history-item-header {
    font-size: 0.85rem;
    color: var(--secondary-text-color);
    margin-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}
.history-item-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
    font-size: 0.9rem;
}
.history-result {
    display: flex;
    justify-content: space-between;
}
.history-result .target {
    color: var(--secondary-text-color);
}
.history-result .value {
    font-weight: 600;
    font-family: 'Fira Code', 'Courier New', monospace;
}
.history-result .value.good { color: var(--status-good); }
.history-result .value.moderate { color: var(--status-moderate); }
.history-result .value.high { color: var(--status-high); }
.history-result .value.failed { color: var(--error-color); }


/* --- Site Footer --- */
.site-footer {
  margin-top: 3rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border-color);
  background-color: #1a1a1a;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.site-footer p { font-size: 0.9rem; color: var(--secondary-text-color); }
.footer-nav { display: flex; gap: 1.5rem; }
.footer-nav button {
    background: none;
    border: none;
    color: var(--secondary-text-color);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s ease;
    padding: 0;
}
.footer-nav button:hover { color: var(--accent-color); text-decoration: underline; }


/* --- Modal --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}
.modal-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    animation: slideIn 0.3s ease;
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
}
.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--secondary-text-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.2s ease;
}
.modal-close-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
}
.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex-grow: 1;
}
.modal-body h3 {
    color: var(--accent-color);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
}
.modal-body p {
    margin-bottom: 1rem;
    color: var(--secondary-text-color);
}
.modal-body ul {
    list-style-position: inside;
    padding-left: 0.5rem;
    margin-bottom: 1rem;
}
.modal-body li {
    margin-bottom: 0.5rem;
    color: var(--secondary-text-color);
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideIn { from { transform: translateY(-30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* --- Error & Placeholders --- */
.error-fullpage { color: #f8d7da; background-color: #3e1a1f; border: 1px solid #dc3545; padding: 2rem; margin: 2rem; border-radius: 12px; text-align: center; }
.placeholder-shimmer { position: relative; overflow: hidden; background-color: var(--placeholder-bg); }
.placeholder-shimmer::after { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; transform: translateX(-100%); background: linear-gradient(90deg, transparent, rgba(51, 51, 51, 0.4), transparent); animation: placeholder-shimmer 1.5s infinite; }
@keyframes placeholder-shimmer { 100% { transform: translateX(100%); } }
.placeholder-line { background-color: var(--placeholder-element-bg); border-radius: 4px; }
.placeholder-circle { border-radius: 50%; width: 48px; height: 48px; background-color: var(--placeholder-element-bg); }
.map-placeholder { height: 400px; border-radius: 12px; border: 1px solid var(--border-color); background-color: #1a1a1a; display: flex; align-items: center; justify-content: center; }
.map-placeholder-message { color: var(--secondary-text-color); }

/* Loading dots animation */
.loading-dots span { animation: blink 1.4s infinite both; }
.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%, 80%, 100% { opacity: 0; } 40% { opacity: 1; } }


/* --- Responsive Design --- */
@media (min-width: 1024px) {
  .overview-grid { grid-template-columns: 420px 1fr; }
}

@media (max-width: 768px) {
  .main-container { padding: 0 1rem; padding-top: 80px; }
  .nav-container { padding: 0 1rem; }
  .nav-logo { display: none; }
  .nav-links { flex-grow: 1; justify-content: space-around; }
  .nav-links button { padding: 0.75rem; }
  .nav-links button .nav-label { display: none; }
  .nav-links button svg { width: 24px; height: 24px; }
  .hero-header { padding: 2rem 0; }
  .section-title { font-size: 1.75rem; }
  .info-grid { grid-template-columns: 1fr; }
  .footer-container { flex-direction: column; text-align: center; }
  .tool-content { padding: 1.5rem 1rem; }
  .tool-tabs button { flex-grow: 1; justify-content: center; }
  .dns-record { grid-template-columns: 50px 1fr 70px; gap: 0.5rem; font-size: 0.8rem; }
}