Pastebin

:root {
  --bg: #0f172a;        /* dark background */
  --card: #1e293b;      /* card background */
  --border: #334155;    /* subtle borders */
  --primary: #3b82f6;   /* blue button */
  --primary-hover: #2563eb;
  --text: #f8fafc;      /* light text */
  --muted: #94a3b8;     /* muted gray */
  --radius: 10px;
  --shadow: 0 2px 10px rgba(0,0,0,0.6);
  font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  display: flex;
  justify-content: center;
  padding: 2rem;
}

.container {
  max-width: 600px;
  width: 100%;
  background: var(--card);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  text-align: center;
}

.row {
  display: grid;
  gap: 1rem;
}

input[type="text"] {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #0f172a;
  color: var(--text);
  font-size: 0.95rem;
  transition: border 0.2s, box-shadow 0.2s;
}

input[type="text"]::placeholder {
  color: var(--muted);
}

input[type="text"]:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.3);
  outline: none;
}

.actions {
  display: flex;
  justify-content: center;
  margin-top: 1.5rem;
}

button {
  padding: 0.7rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  background: var(--primary);
  color: white;
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

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

button:active {
  transform: scale(0.98);
}

.output {
  margin-top: 2rem;
  padding: 1rem;
  background: #0f172a;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  min-height: 4rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-word;
}

.muted {
  color: var(--muted);
}