/* ===== Base ===== */
* { box-sizing: border-box; }

:root{
  --bg: #0b1220;
  --card: rgba(255,255,255,0.06);
  --card2: rgba(255,255,255,0.08);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.68);
  --border: rgba(255,255,255,0.12);
  --shadow: 0 18px 50px rgba(0,0,0,0.45);
  --radius: 18px;
}

body{
  margin: 0;
  min-height: 100vh;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 15% 15%, rgba(99,102,241,0.35), transparent 55%),
    radial-gradient(900px 500px at 85% 25%, rgba(34,197,94,0.18), transparent 55%),
    radial-gradient(900px 500px at 50% 85%, rgba(236,72,153,0.18), transparent 55%),
    linear-gradient(180deg, #070a12, #0b1220 55%, #070a12);
  padding: 28px 16px;
}

/* ===== Layout ===== */
.app{
  width: min(720px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: calc(var(--radius) + 8px);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

/* ===== Header ===== */
h1{
  margin: 0;
  font-size: clamp(24px, 3vw, 34px);
  letter-spacing: -0.02em;
}

.app p{
  margin: 0;
  color: var(--muted);
}

.app > h1{
  padding: 6px 2px 2px;
}

/* ===== Form area ===== */
label{
  display: grid;
  gap: 8px;
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
}

label > span,
label:first-of-type,
label:last-of-type{
  color: var(--muted);
  font-size: 13px;
}

input, select{
  width: 100%;
  padding: 12px 12px;
  font-size: 16px;
  color: var(--text);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 12px;
  outline: none;
  transition: border 160ms ease, transform 160ms ease, background 160ms ease;
}

input::placeholder{ color: rgba(255,255,255,0.45); }

input:focus, select:focus{
  border-color: rgba(99,102,241,0.7);
  background: rgba(255,255,255,0.085);
}

/* ===== Buttons ===== */
.actions{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

button{
  padding: 12px 14px;
  font-size: 16px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.08);
  color: var(--text);
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, border 140ms ease;
}

button:hover{
  transform: translateY(-1px);
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.22);
}

button:active{
  transform: translateY(0px);
}

#getBtn{
  background: linear-gradient(135deg, rgba(99,102,241,0.75), rgba(236,72,153,0.55));
  border-color: rgba(255,255,255,0.22);
}

#getBtn:hover{
  background: linear-gradient(135deg, rgba(99,102,241,0.85), rgba(236,72,153,0.65));
}

#resetBtn{
  background: rgba(255,255,255,0.06);
}

/* ===== Output Card ===== */
.output{
  padding: 16px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--card), var(--card2));
}

.output h2{
  margin: 0 0 8px 0;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-transform: uppercase;
}

#messageOutput{
  margin: 0;
  font-size: 18px;
  line-height: 1.5;
}

/* ===== Mobile ===== */
@media (max-width: 520px){
  .app{ padding: 14px; }
  .actions{ grid-template-columns: 1fr; }
  input, select, button{ font-size: 15px; }
  #messageOutput{ font-size: 17px; }
}

#messageOutput {
  transition: opacity 180ms ease, transform 180ms ease;
}
#messageOutput.is-updating {
  opacity: 0;
  transform: translateY(4px);
}