:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;
  color-scheme: light;
  color: #213547;
  background-color: #fff;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a {
  font-weight: 500;
  color: #646cff;
  text-decoration: inherit;
}
a:hover {
  color: #535bf2;
}
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  box-sizing: border-box;
}
*,
*:before,
*:after {
  box-sizing: inherit;
}
h1 {
  font-size: 2.5em;
  line-height: 1.1;
}
button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #f0f0f0;
  color: #333;
  cursor: pointer;
  transition: border-color 0.25s, background-color 0.25s;
}
button:hover {
  border-color: #646cff;
  background-color: #e0e0e0;
}
button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}
@media (max-width: 600px) {
  h1 {
    font-size: 2em;
  }
}
@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #fff;
  }
  a:hover {
    color: #747bff;
  }
  button {
    background-color: #f9f9f9;
  }
}
.table-container {
  border: 2px solid #646cff;
  padding: 10px;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  text-align: center;
  font-size: 1rem;
  background-color: #f8f9fa;
  color: #333;
  margin-bottom: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 6px #00000012;
}
table {
  border-collapse: collapse;
  width: 100%;
}
th,
td {
  border: 1px solid #ced4da;
  padding: 8px;
  min-width: 45px;
  height: 45px;
  text-align: center;
  font-size: 0.9rem;
}
th {
  background-color: #fff;
}
.window-active {
  background-color: #ffc107;
  color: #000;
  font-weight: 700;
}
.control-row {
  background-color: #fff;
}
.control-row td {
  vertical-align: middle;
}
.switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
}
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: #e74c3c;
  transition: 0.4s;
  border-radius: 22px;
}
.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: #fff;
  transition: 0.4s;
  border-radius: 50%;
}
input:checked + .slider {
  background-color: #2ecc71;
}
input:checked + .slider:before {
  transform: translate(18px);
}
.log-container {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  border-radius: 8px;
  overflow: hidden;
  background-color: #f8f9fa;
  box-shadow: 0 4px 6px #00000012;
  border: 1px solid #ced4da;
}
.log-container h5 {
  text-align: center;
  margin: 0;
  padding: 15px;
  background-color: #87ceeb;
  color: #000;
  font-size: 1.2rem;
  border-bottom: 1px solid #cce7f5;
}
.log-content {
  text-align: left;
  overflow-y: auto;
  height: 350px;
  padding: 15px;
  color: #000;
  font-family: Courier New, Courier, monospace;
}
.log-content ol {
  list-style-type: none;
  padding-left: 0;
  margin: 0;
}
.log-content li {
  padding-bottom: 8px;
  border-bottom: 1px solid #dde;
  margin-bottom: 8px;
  font-size: 0.9rem;
  word-break: break-word;
}
.animation-container {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 800px;
  margin: 2rem auto;
  background-color: #f8f9fa;
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 4px 6px #00000012;
  border: 1px solid #ced4da;
}
.entity-label-container {
  display: flex;
  justify-content: space-between;
  width: 100%;
  margin-bottom: 1rem;
}
.entity {
  font-weight: 700;
  font-size: 1rem;
  padding: 0.5rem;
  background-color: #dee2e6;
  border-radius: 4px;
  color: #343a40;
  border: 1px solid #adb5bd;
}
@media (min-width: 768px) {
  .entity {
    font-size: 1.2rem;
    padding: 1rem;
  }
}
.animation-svg {
  width: 100%;
  overflow: hidden;
}
@keyframes slide {
  0% {
    transform: translate(0);
  }
  to {
    transform: translate(calc(100% - 40px));
  }
}
@keyframes slide-ack {
  0% {
    transform: translate(0);
  }
  to {
    transform: translate(calc(-100% + 40px));
  }
}
.transit-item.packet {
  animation: slide 1.5s linear forwards;
}
.transit-item.ack {
  animation: slide-ack 1.5s linear forwards;
}
.transit-item .label {
  fill: #000;
  font-size: 0.8rem;
  font-weight: 700;
}
.transit-item .circle-bg {
  stroke-width: 2;
  fill: #3498db;
  stroke: #2980b9;
}
.transit-item.ack .circle-bg {
  fill: #2ecc71;
  stroke: #27ae60;
}
.path {
  stroke: #adb5bd;
  stroke-width: 2;
  stroke-dasharray: 5 5;
}
.transit-item.lost {
  opacity: 0.5;
}
.transit-item.lost .circle-bg {
  fill: #e74c3c;
  stroke: #c0392b;
}
@media (max-width: 768px) {
  .animation-container {
    padding: 0.5rem;
  }
}
.status-container {
  display: flex;
  gap: 1rem;
  background-color: #e9ecef;
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid #ced4da;
  margin-bottom: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  box-shadow: 0 4px 6px #00000012;
}
.status-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.status-item .label {
  font-family: Courier New, Courier, monospace;
  color: #495057;
  font-size: 1rem;
  white-space: nowrap;
}
.status-item .value {
  font-family: Courier New, Courier, monospace;
  font-size: 1.3rem;
  font-weight: 700;
}
@media (max-width: 420px) {
  .status-item .label {
    font-size: 0.85rem;
  }
  .status-item .value {
    font-size: 1.1rem;
  }
  .status-container {
    gap: 0.5rem;
    padding: 0.75rem;
  }
}
.value.base {
  color: #2ecc71;
}
.value.nextseqnum {
  color: #3498db;
}
.value.timer {
  color: #000;
}
.value.cwnd {
  color: #e74c3c;
}
.value.ssthresh {
  color: #9b59b6;
}
#root {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem;
  text-align: center;
  width: 100%;
}
body {
  font-family: Segoe UI, Tahoma, Geneva, Verdana, sans-serif;
}
.app-container header {
  margin-bottom: 2rem;
  border-bottom: 2px solid #646cff;
  padding-bottom: 1rem;
}
.app-container header h1 {
  font-size: 2.5rem;
  color: #646cff;
  word-break: break-word;
}
.app-container header button {
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #f0f0f0;
  cursor: pointer;
  transition: all 0.25s ease;
  border-radius: 8px;
  border: 1px solid transparent;
  color: #333;
}
.app-container header button:hover {
  border-color: #646cff;
  background-color: #e0e0e0;
}
.app-container header button:disabled {
  background-color: #ccc;
  cursor: not-allowed;
  border-color: #aaa;
  opacity: 0.6;
}
.main-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  width: 100%;
}
@media (min-width: 900px) {
  .main-content {
    flex-direction: row;
    align-items: flex-start;
    justify-content: center;
  }
  #root {
    padding: 2rem;
  }
}
.timer-display {
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  background-color: #f8f9fa;
  border-radius: 8px;
  border: 1px solid #ced4da;
  font-family: Courier New, Courier, monospace;
  font-size: 1.2rem;
  color: #ffc107;
  box-shadow: 0 4px 6px #00000012;
  word-break: break-all;
}
.controls-container {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 2rem;
}
.controls-container button {
  padding: 0.8em 1.5em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #646cff;
  color: #fff;
  cursor: pointer;
  transition: all 0.25s ease;
  border-radius: 8px;
  border: none;
  flex-grow: 1;
  flex-basis: 150px;
}
.controls-container button:hover {
  background-color: #535bf2;
}
.controls-container button:disabled {
  background-color: #ccc;
  color: #888;
  cursor: not-allowed;
  opacity: 0.8;
}
.status-badge.closed,
.status-badge.listen {
  background-color: #e74c3c;
}
.status-badge.syn_sent,
.status-badge.syn_rcvd {
  background-color: #f39c12;
}
.handshake-container {
  display: flex;
  justify-content: space-around;
  width: 100%;
  margin: 2rem 0;
  flex-wrap: wrap;
  gap: 1rem;
}
.entity-container {
  text-align: center;
  background-color: #f8f9fa;
  padding: 1rem 1.5rem;
  border-radius: 8px;
  flex: 1;
  min-width: 250px;
  border: 1px solid #ced4da;
  box-shadow: 0 4px 6px #00000012;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}
.entity-container p {
  color: #6c757d;
  font-weight: 500;
  margin: 0.25rem 0.5rem;
  display: flex;
  align-items: center;
}
.entity-container h2 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  color: #343a40;
  width: 100%;
}
.entity-container button {
  margin: 0.25rem;
  background-color: #646cff;
  color: #fff;
  border: none;
  transition: background-color 0.25s ease;
}
.entity-container button:hover {
  background-color: #535bf2;
}
.entity-container button:disabled {
  background-color: #ccc;
  color: #888;
  border: none;
  opacity: 0.8;
}
.status-badge {
  padding: 0.3em 0.8em;
  border-radius: 1em;
  font-weight: 700;
  color: #fff;
  display: inline-block;
  margin-bottom: 0;
  margin-left: 0.5rem;
  font-size: 0.9rem;
}
.status-badge.closed {
  background-color: #e74c3c;
}
.status-badge.established {
  background-color: #2ecc71;
}
.status-badge.fin_wait_1,
.status-badge.fin_wait_2,
.status-badge.time_wait,
.status-badge.close_wait,
.status-badge.last_ack {
  background-color: #f39c12;
}
.controls-table {
  margin: 0 auto 2rem;
  background-color: #f8f9fa;
  padding: 1rem;
  border-radius: 8px;
  width: fit-content;
  border: 1px solid #ced4da;
  box-shadow: 0 4px 6px #00000012;
}
.controls-table table {
  border-collapse: collapse;
}
.controls-table td {
  padding: 8px;
  border: 1px solid #dee2e6;
  text-align: center;
  vertical-align: middle;
}
@media (max-width: 600px) {
  .entity-container {
    padding: 0.25rem 1rem 0.5rem;
    min-width: 180px;
  }
  .entity-container h2 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
    margin-top: 0.25rem;
  }
  .status-badge {
    margin-bottom: 0.5rem;
  }
  .entity-container button {
    margin-top: 0.5rem;
    padding: 0.4em 0.8em;
    font-size: 0.85rem;
  }
  .handshake-container {
    margin: 0.5rem 0;
    gap: 0.5rem;
  }
}
.phase-display {
  color: #d9a000;
  text-transform: capitalize;
  font-weight: 700;
}
.navbar {
  background-color: #dee2e6;
  padding: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  border-radius: 8px;
  flex-wrap: wrap;
  position: relative;
  min-height: 60px;
  border: 1px solid #adb5bd;
  box-shadow: 0 4px 6px #00000012;
}
.navbar-title {
  display: none;
  color: #646cff;
  font-size: 1.5em;
  margin: 0;
  text-align: center;
  word-break: break-word;
}
.navbar-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.navbar-links button {
  background-color: #f1f3f5;
  color: #495057;
  border: 1px solid #ced4da;
  padding: 0.8rem 1.2rem;
  cursor: pointer;
  border-radius: 5px;
  font-size: 1rem;
  transition: background-color 0.3s ease;
}
.navbar-links button:hover {
  background-color: #ced4da;
}
.navbar-links button.active {
  background-color: #646cff;
  color: #fff;
  border-color: #646cff;
}
.hamburger-menu {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1001;
  font-size: 1rem;
}
.hamburger-bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px 0;
  background-color: #333;
  transition: 0.3s;
}
@media (max-width: 768px) {
  .navbar {
    justify-content: center;
  }
  .navbar-title {
    display: block;
    font-size: 1.2em;
    padding-left: 45px;
    padding-right: 45px;
  }
  .hamburger-menu {
    display: block;
  }
  .navbar-links {
    display: none;
  }
  .navbar-links.open {
    display: flex;
    flex-direction: column;
    width: 100%;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #dee2e6;
    padding: 1rem;
    border-radius: 0 0 8px 8px;
    box-shadow: 0 4px 8px #0000001a;
    z-index: 1000;
    gap: 0;
  }
  .navbar-links.open button {
    width: 100%;
    text-align: left;
    padding: 1rem;
    font-size: 1rem;
    background-color: #f1f3f5;
    color: #333;
    border: none;
    border-bottom: 1px solid #adb5bd;
    border-left: 1px solid #adb5bd;
    border-right: 1px solid #adb5bd;
    border-radius: 0;
  }
  .navbar-links.open button:first-child {
    border-top: 1px solid #adb5bd;
    border-radius: 5px 5px 0 0;
  }
  .navbar-links.open button:last-child {
    border-radius: 0 0 5px 5px;
  }
  .navbar-links.open button:hover,
  .navbar-links.open button:active {
    background-color: #e9ecef;
  }
}