:root {
  --bg: #0b0f14;
  --bg-glow-a: #132033;
  --bg-glow-b: #1a1528;
  --surface: #101722;
  --surface-2: #0f1b2a;
  --text: #e8eef7;
  --muted: #9aa8bc;
  --accent: #63b3ff;
  --accent-2: #86efac;
  --border: #223247;
  --radius: 14px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  padding: 28px 16px;
  display: grid;
  place-items: center;
  font-family: "Sora", "Manrope", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(
      50rem 30rem at 8% -8%,
      rgba(99, 179, 255, 0.18),
      transparent 60%
    ),
    radial-gradient(
      42rem 24rem at 92% 108%,
      rgba(134, 239, 172, 0.14),
      transparent 58%
    ),
    linear-gradient(180deg, #090d12, var(--bg));
}

.card {
  width: min(960px, 100%);
  border: 1px solid var(--border);
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0)),
    linear-gradient(145deg, var(--surface), var(--surface-2));
  box-shadow: var(--shadow);
  padding: clamp(18px, 3vw, 34px);
  backdrop-filter: blur(8px);
}

.topbar {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
}

h1 {
  margin: 0;
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  letter-spacing: 0.01em;
  font-weight: 700;
}

p {
  margin: 10px 0 18px;
  color: var(--muted);
  line-height: 1.5;
}

.theme-label,
label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-weight: 700;
  color: var(--muted);
}

#theme {
  width: auto;
  min-width: 120px;
}

form {
  display: grid;
  grid-template-columns: 1fr 180px 150px auto;
  gap: 12px;
  align-items: end;
}

input,
select,
button {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font: inherit;
}

input,
select {
  padding: 11px 12px;
  background: rgba(8, 14, 22, 0.7);
  color: var(--text);
}

input::placeholder {
  color: #7f90a7;
}

input:focus,
select:focus,
button:focus {
  outline: 2px solid rgba(99, 179, 255, 0.45);
  outline-offset: 2px;
}

button {
  padding: 11px 16px;
  border-color: #38679a;
  color: #f3f8ff;
  font-weight: 700;
  cursor: pointer;
  background: linear-gradient(180deg, #3c84c7, #2a5f94);
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(60, 132, 199, 0.34);
}

#preview {
  margin-top: 18px;
  min-height: 240px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: #ffffff;
  display: grid;
  place-items: center;
  padding: 16px;
  overflow: auto;
  color: var(--muted);
}

#preview svg,
#preview canvas {
  max-width: 100%;
  height: auto;
}

#status {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.92rem;
}

code {
  padding: 2px 7px;
  border-radius: 8px;
  color: #d8e9ff;
  border: 1px solid #2f445e;
  background: rgba(26, 42, 63, 0.7);
}

@media (max-width: 860px) {
  .topbar {
    grid-template-columns: 1fr;
  }
  #theme {
    width: 100%;
  }
  form {
    grid-template-columns: 1fr;
  }
}