/* Use predictable sizing for every element. */
* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;

  --background: #080c14;
  --surface: #111827;
  --surface-light: #182235;
  --border: #2b3952;
  --text: #edf4ff;
  --muted: #9eabc0;
  --accent: #4ca6ff;
  --accent-hover: #78bcff;
  --success: #49d17d;
  --danger: #ff6b73;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, #17253b 0%, var(--background) 42%);
  color: var(--text);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

button,
input {
  font: inherit;
}

.page-shell {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 32px 20px;
}

.tool-panel {
  width: min(760px, 100%);
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(17, 24, 39, 0.96);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 12px;
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.05;
}

.description {
  max-width: 62ch;
  margin-bottom: 28px;
  color: var(--muted);
  line-height: 1.6;
}

.uptime-form label {
  display: block;
  margin-bottom: 8px;
  font-weight: 650;
}

.input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

input {
  min-width: 0;
  padding: 13px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0b1220;
  color: var(--text);
  outline: none;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(76, 166, 255, 0.16);
}

button {
  padding: 13px 18px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #04101c;
  font-weight: 750;
  cursor: pointer;
}

button:hover {
  background: var(--accent-hover);
}

button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.status-message {
  min-height: 24px;
  margin: 18px 0 0;
  color: var(--muted);
}

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

.result-panel {
  margin-top: 24px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-light);
}

.result-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.result-heading h2 {
  margin-bottom: 0;
  font-size: 1.25rem;
}

.status-badge {
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 750;
}

.status-badge.online {
  background: rgba(73, 209, 125, 0.14);
  color: var(--success);
}

.status-badge.offline {
  background: rgba(255, 107, 115, 0.14);
  color: var(--danger);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
}

.result-grid div {
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0d1523;
}

.result-grid dt,
.final-url-block span {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.82rem;
}

.result-grid dd {
  margin: 0;
  font-weight: 700;
}

.final-url-block {
  display: grid;
  gap: 5px;
  margin-top: 14px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0d1523;
}

.final-url-block a {
  color: var(--accent);
  overflow-wrap: anywhere;
}

@media (max-width: 640px) {
  .tool-panel {
    padding: 24px 18px;
  }

  .input-row {
    grid-template-columns: 1fr;
  }

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

  button {
    width: 100%;
  }
}