:root {
  color-scheme: dark;
  --bg: #090d18;
  --surface: rgba(18, 25, 43, 0.82);
  --surface-strong: #151d31;
  --border: rgba(148, 163, 184, 0.17);
  --text: #f7f9fc;
  --muted: #98a5ba;
  --cyan: #5de4c7;
  --blue: #72a5ff;
  --danger: #ff8d8d;
  --warning: #f6c76b;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -18%, rgba(42, 100, 152, 0.2), transparent 40rem),
    var(--bg);
}

button {
  font: inherit;
}

.ambient {
  position: fixed;
  z-index: -1;
  width: 25rem;
  height: 25rem;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.12;
  pointer-events: none;
}

.ambient-one {
  top: 18%;
  left: -14rem;
  background: var(--cyan);
}

.ambient-two {
  top: 6%;
  right: -13rem;
  background: var(--blue);
}

.shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 88px 0 40px;
}

.hero {
  max-width: 760px;
  margin-bottom: 50px;
}

.eyebrow,
.section-kicker,
.card-kicker,
.summary-label {
  margin: 0;
  color: var(--cyan);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 17px;
}

.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(93, 228, 199, 0.1);
}

h1 {
  max-width: 700px;
  margin: 0;
  font-size: clamp(2.5rem, 7vw, 5.3rem);
  line-height: 0.98;
  letter-spacing: -0.06em;
}

.intro {
  max-width: 650px;
  margin: 27px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.8;
}

.summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  min-height: 82px;
  margin-bottom: 22px;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 17px;
  background: rgba(13, 19, 33, 0.7);
  backdrop-filter: blur(20px);
}

.summary-icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid rgba(93, 228, 199, 0.2);
  border-radius: 13px;
  color: var(--cyan);
  background: rgba(93, 228, 199, 0.08);
  font-size: 1.35rem;
}

.summary-label {
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 0.64rem;
}

#summary-text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.45;
}

.secondary-button,
.copy-button {
  border: 1px solid var(--border);
  color: var(--text);
  background: rgba(255, 255, 255, 0.035);
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.secondary-button {
  padding: 10px 15px;
  border-radius: 10px;
}

.secondary-button:hover,
.copy-button:not(:disabled):hover {
  border-color: rgba(93, 228, 199, 0.52);
  background: rgba(93, 228, 199, 0.08);
}

.secondary-button:active,
.copy-button:not(:disabled):active {
  transform: translateY(1px);
}

.secondary-button:focus-visible,
.copy-button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  position: relative;
  min-height: 330px;
  padding: 24px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(22, 30, 50, 0.92), rgba(13, 19, 33, 0.8));
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.16);
}

.card.featured {
  border-color: rgba(93, 228, 199, 0.24);
  background:
    linear-gradient(145deg, rgba(25, 48, 60, 0.65), rgba(13, 19, 33, 0.88));
}

.card.featured::before {
  position: absolute;
  top: -7rem;
  right: -7rem;
  width: 14rem;
  height: 14rem;
  border-radius: 50%;
  background: rgba(93, 228, 199, 0.08);
  content: "";
}

.card-topline,
.result-row,
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.route-tag {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: #d9e1ee;
  background: rgba(255, 255, 255, 0.03);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.05em;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 0.73rem;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.status.loading .status-dot {
  animation: status-pulse 1.2s ease-in-out infinite;
}

.status.success {
  color: var(--cyan);
}

.status.error {
  color: var(--danger);
}

@keyframes status-pulse {
  50% { opacity: 0.28; }
}

.card-heading {
  margin: 50px 0 23px;
}

.card-kicker {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.64rem;
}

.card h2 {
  margin: 0;
  font-size: 1.34rem;
  letter-spacing: -0.02em;
}

.result-row {
  gap: 12px;
}

.ip-address {
  min-width: 0;
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.035em;
}

.copy-button {
  flex: 0 0 auto;
  padding: 7px 9px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.7rem;
}

.copy-button:disabled {
  cursor: default;
  opacity: 0.45;
}

.location {
  min-height: 44px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.55;
}

.card-footer {
  position: absolute;
  right: 24px;
  bottom: 23px;
  left: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.71rem;
}

.provider {
  color: #c9d3e2;
  font-weight: 650;
}

.explanation {
  display: grid;
  grid-template-columns: 0.8fr 2fr;
  gap: 60px;
  margin-top: 72px;
  padding: 44px 0 54px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-kicker {
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.63rem;
}

.explanation h2 {
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: -0.035em;
}

.explanation-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.explanation-grid p {
  margin: 0;
}

.explanation-grid strong,
.explanation-grid span {
  display: block;
}

.explanation-grid strong {
  margin-bottom: 11px;
  font-size: 0.9rem;
}

.explanation-grid span {
  color: var(--muted);
  font-size: 0.79rem;
  line-height: 1.65;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding: 25px 0 0;
  color: #69768b;
  font-size: 0.72rem;
  line-height: 1.65;
}

footer p {
  margin: 0;
}

.footer-project {
  flex: 0 1 auto;
  text-align: right;
}

footer a {
  color: #94a3b8;
  text-decoration-color: rgba(148, 163, 184, 0.4);
  text-underline-offset: 3px;
  transition: color 160ms ease, text-decoration-color 160ms ease;
}

footer a:hover {
  color: var(--cyan);
  text-decoration-color: currentColor;
}

footer a:focus-visible {
  border-radius: 2px;
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

noscript {
  position: fixed;
  right: 20px;
  bottom: 20px;
  left: 20px;
  padding: 15px;
  border-radius: 10px;
  color: #111827;
  background: var(--warning);
  text-align: center;
}

@media (max-width: 900px) {
  .shell {
    padding-top: 64px;
  }

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

  .card {
    min-height: 300px;
  }

  .explanation {
    grid-template-columns: 1fr;
    gap: 35px;
  }
}

@media (max-width: 650px) {
  .shell {
    width: min(100% - 28px, 1180px);
    padding-top: 42px;
  }

  .hero {
    margin-bottom: 36px;
  }

  h1 {
    font-size: clamp(2.55rem, 14vw, 4rem);
  }

  .summary {
    grid-template-columns: auto 1fr;
  }

  .secondary-button {
    grid-column: 1 / -1;
    width: 100%;
  }

  .card {
    min-height: 292px;
    padding: 21px;
  }

  .card-heading {
    margin-top: 38px;
  }

  .card-footer {
    right: 21px;
    bottom: 20px;
    left: 21px;
  }

  .explanation {
    margin-top: 54px;
  }

  .explanation-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  footer {
    flex-direction: column;
    gap: 14px;
    line-height: 1.5;
  }

  .footer-project {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}