* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

body {
  background: linear-gradient(180deg, #081c3a, #020b1c);
  color: #eaf4ff;
}

/* BANNER */
.banner {
  position: relative;
  height: 180px;
  overflow: hidden;
}

.banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.6);
}

.banner-text {
  position: absolute;
  bottom: 20px;
  left: 20px;
}

.banner-text h1 {
  color: #4fc3ff;
  font-size: 24px;
}

.banner-text p {
  font-size: 13px;
  opacity: 0.9;
}

/* PANEL */
.panel {
  padding: 16px;
  display: grid;
  gap: 16px;
}

/* CARD */
.card {
  background: rgba(10, 40, 80, 0.55);
  backdrop-filter: blur(14px);
  border-radius: 18px;
  padding: 16px;
  box-shadow: 0 0 20px rgba(79,195,255,0.15);
  animation: fadeIn 0.5s ease;
}

.card h2 {
  color: #4fc3ff;
  margin-bottom: 12px;
}

/* TOGGLE */
.toggle {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 12px 0;
}

/* SWITCH */
.switch {
  position: relative;
  width: 52px;
  height: 28px;
}

.switch input {
  display: none;
}

.slider {
  position: absolute;
  background: #1b3f66;
  border-radius: 34px;
  inset: 0;
  transition: 0.35s;
}

.slider::before {
  content: "";
  position: absolute;
  height: 22px;
  width: 22px;
  left: 3px;
  top: 3px;
  background: white;
  border-radius: 50%;
  transition: 0.35s;
}

input:checked + .slider {
  background: #4fc3ff;
  box-shadow: 0 0 12px #4fc3ff;
}

input:checked + .slider::before {
  transform: translateX(24px);
}

/* BUTTON */
button {
  width: 100%;
  padding: 12px;
  margin-top: 8px;
  background: linear-gradient(135deg, #2fa4ff, #0066ff);
  border: none;
  border-radius: 14px;
  color: white;
  font-size: 14px;
  transition: 0.3s;
}

button:active {
  transform: scale(0.96);
}

/* ANIMATION */
@keyframes fadeIn {
  from {opacity: 0; transform: translateY(10px);}
  to {opacity: 1; transform: translateY(0);}
}