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

* { box-sizing: border-box; margin:0; padding:0; }
body {
  font-family: 'Roboto Mono', monospace;
  background: #1e1e1e;
  color: #d4d4d4;
  line-height: 1.6;
}
.container { max-width: 860px; margin: 3rem auto; padding: 0 1rem; }
header { text-align: center; margin-bottom: 2rem; }
h1 { font-size: 3rem; margin: 0; color: #4fc3f7; }

.big-description {
  font-size: 1.9rem;
  font-weight: bold;
  color: #81c995;
  margin: 1.5rem 0 2.5rem;
  text-align: center;
  min-height: 2.4rem;
}

.input-card {
  display: flex; flex-direction: column; gap: 0.8rem;
  background: #2d2d2d; padding: 1.2rem; border-radius: 8px;
  border: 2px solid #444; margin-bottom: 1rem;
}
.controls { display: flex; gap: 0.8rem; }
#expr {
  flex: 1; padding: 1rem; font-size: 1.4rem; background: #111;
  color: #fff; border: 2px solid #444; border-radius: 6px; font-family: inherit;
}
#expr:focus { outline: none; border-color: #4fc3f7; }
#tz, #random-btn {
  padding: 0.6rem 1rem; background: #444; color: #fff;
  border: none; border-radius: 6px; font-family: inherit; cursor: pointer;
}
#random-btn:hover, #tz:hover { background: #555; }

.legend {
  display: flex; align-items: center; gap: 1.2rem;
  padding: 0.9rem 0; font-size: 0.9rem; color: #888;
  cursor: pointer; user-select: none;
}
.info-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.4rem; height: 1.4rem; background: #444; color: #aaa;
  border-radius: 50%; font-weight: bold; font-size: 0.8rem;
}
.legend:hover { color: #ccc; }
.legend:hover .info-icon { background: #555; }

.syntax-table {
  margin: 1rem 0 2.5rem; background: #111;
  padding: 1rem; border-radius: 8px; font-size: 0.95rem;
}
.syntax-table summary {
  cursor: pointer; color: #4fc3f7; margin-bottom: 0.5rem;
}
.syntax-table table { width: 100%; border-collapse: collapse; }
.syntax-table td {
  padding: 0.4rem 0; border-bottom: 1px solid #333;
}
.syntax-table td:first-child {
  width: 6rem; font-family: monospace; color: #81c995;
}

#next-runs { margin: 3rem 0; }
#next-runs h3 { margin: 0 0 0.8rem; color: #bbb; font-size: 1.1rem; }
#next-list { padding-left: 1.4rem; margin: 0; }
#next-list li { margin: 0.6rem 0; font-size: 1.25rem; color: #a8e6cf; }

details.debug { margin: 3rem 0; font-size: 0.9rem; }
summary { cursor: pointer; color: #666; padding: 0.5rem 0; }

.error {
  color: #f44336; font-weight: bold; margin: 2rem 0; text-align: center;
}

footer {
  text-align: center; margin-top: 5rem; font-size: 0.9rem; color: #777;
}
footer a { color: #4fc3f7; text-decoration: none; }
footer a:hover { text-decoration: underline; }