@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  color-scheme: light;
  --bg: #f3f3f2;
  --paper: #f7f7f6;
  --text: #171717;
  --muted: #777775;
  --line: #d8d8d6;
  --line-strong: #bfc0bc;
  --accent: #202020;
  --ok: #1e5f34;
  --error: #8d2a2a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 10%, rgba(0, 0, 0, 0.03), transparent 34%),
    radial-gradient(circle at 88% 82%, rgba(0, 0, 0, 0.025), transparent 38%),
    var(--bg);
  color: var(--text);
  font-family: 'Manrope', 'Avenir Next', 'Segoe UI', sans-serif;
}

.app {
  width: min(1100px, 92vw);
  margin: 0 auto;
  padding: 2.4rem 0 3rem;
}

.hero {
  max-width: 530px;
  margin: 2.85rem 0 3.5rem;
  animation: lift-in 380ms ease-out;
}

.hero h1 {
  margin: 0;
  line-height: 0.99;
  letter-spacing: -0.05em;
  font-size: clamp(2.1rem, 6vw, 4rem);
  font-weight: 600;
}

.hero p {
  margin: 1.25rem 0 0;
  color: #474744;
  max-width: 46ch;
  line-height: 1.55;
  font-size: 1.04rem;
}

.hero-link {
  margin-top: 0.6rem;
}

.hero-link a {
  color: #3d3d3b;
  text-underline-offset: 0.15em;
}

.hero-link a:hover {
  color: #1f1f1e;
}

.hero p code {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.91em;
  color: #3d3d3d;
}

.workbench {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 1.2rem 0 1.4rem;
  display: grid;
  gap: 0.95rem;
}

.offset-form {
  display: grid;
  gap: 0.55rem;
}

label {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 600;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.65rem;
}

input,
button {
  font: inherit;
  border-radius: 0;
}

input {
  border: 1px solid var(--line-strong);
  padding: 0.78rem 0.86rem;
  background: var(--paper);
  color: var(--text);
}

input::placeholder {
  color: #9d9d99;
}

input:focus {
  outline: none;
  border-color: #555;
}

button {
  border: 1px solid #2b2b2b;
  background: #2b2b2b;
  color: #f6f6f5;
  padding: 0.78rem 1.2rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: background-color 180ms ease, color 180ms ease;
}

button:hover {
  background: transparent;
  color: #2b2b2b;
}

.status {
  margin: 0.2rem 0;
  color: #666664;
  font-size: 0.93rem;
}

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

.status.ok {
  color: var(--ok);
}

.result-block {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
}

.result-card {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 0.8rem 0.88rem;
}

.label {
  display: block;
  margin-bottom: 0.42rem;
  color: var(--muted);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.result-card code,
.meta-row code {
  font-family: 'IBM Plex Mono', 'SFMono-Regular', monospace;
  font-size: 0.88rem;
  line-height: 1.45;
  color: #31312f;
  word-break: break-all;
}

.result-card code a {
  color: #1f5fe0;
  text-decoration: none;
}

.result-card code a:hover {
  text-decoration: underline;
}

.meta-row {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  color: #7c7c79;
  font-size: 0.83rem;
}

@media (max-width: 980px) {
  .result-block {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@keyframes lift-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 760px) {
  .app {
    width: min(980px, 94vw);
    padding-top: 1rem;
  }

  .hero {
    margin: 2rem 0 2.5rem;
  }

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

  button {
    width: 100%;
  }

  .result-block {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
}