body {
  margin: 0;
  min-height: 100vh;
  padding: 40px 20px;
  background:
    radial-gradient(circle at center,
      var(--bg1) 0%,
      var(--bg2) 30%,
      var(--bg3) 55%,
      var(--bg4) 75%,
      var(--bg5) 100%);
  color: var(--fg);
  font-family: var(--font-main);
  font-size: var(--font-size);
  font-weight: var(--font-weight);
  font-style: var(--font-style);
}

h1 {
  text-align: center;
  margin-bottom: 40px;
  font-size: 2rem;
  font-weight: 600;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 24px;
  backdrop-filter: blur(10px);
}

.card h2 {
  margin-top: 0;
  margin-bottom: 20px;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--accent);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  padding-bottom: 8px;
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.preset {
  padding: 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  cursor: pointer;
  transition: 0.2s ease;
}

.preset:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent);
}

label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.9rem;
  opacity: 0.9;
}

input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.25);
  background: none;
  cursor: pointer;
  transition: 0.2s ease;
}

input[type="color"]:hover {
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(47, 139, 255, 0.4);
}

.color-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

input[type="range"],
select {
  width: 100%;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.05)
  color: var(--fg);
  font-size: 1rem;
}

.toggle {
  position: relative;
  width: 52px;
  height: 28px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  cursor: pointer;
  transition: 0.2s ease;
}

.toggle::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  background: white;
  border-radius: 50%;
  transition: 0.2s ease;
}

.toggle.active {
  background: var(--accent);
}

.toggle.active::after {
  transform: translateX(24px);
}

.clear-btn {
  margin-top: 16px;
  padding: 10px 16px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--fg);
  cursor: pointer;
  transition: 0.2s ease;
}

.clear-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: var(--accent);
}

.back-btn {
  position: fixed;
  top: 20px;
  left: 20px;
  padding: 10px 20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--fg);
  text-decoration: none;
  font-size: 0.9rem;
  backdrop-filter: blur(10px);
  transition: 0.2s ease;
}

.back-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent);
}