:root {
  color-scheme: light;
  font-family: Inter, system-ui, sans-serif;
  background: #0b1220;
  color: #f8fafc;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
}

.container {
  width: min(640px, calc(100% - 32px));
  padding: 28px 32px;
  min-height: 700px;
  border-radius: 24px;
  background: rgba(42, 42, 88, 0.92);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

.preview-shell {
  width: 307px;
  height: 164px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 24px;
  pointer-events: none;
}

.preview-frame {
  position: relative;
  width: 307px;
  height: 164px;
  background: url('images/leftearrightear.jpg') no-repeat top left;
  background-size: 307px 164px;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.65);
}

.preview-overlay {
  position: absolute;
  width: 110px;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 0 18px rgba(0, 0, 0, 0.35);
  background: rgba(0, 0, 0, 0.15);
  display: none;
}

.preview-overlay img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.preview-overlay--right {
  left: 12px;
  top: 39px;
}

.preview-overlay--left {
  left: 194px;
  top: 36px;
}

h1 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: clamp(2rem, 3vw, 2.6rem);
}

p {
  margin-top: 0;
  margin-bottom: 24px;
  line-height: 1.6;
  color: #a7b3ff;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
}

input[type="url"] {
  width: 90%;
  padding: 14px 16px;
  margin-bottom: 20px;
  border-radius: 16px;
  border: 1px solid #334155;
  background: #0f172a;
  color: #e2e8f0;
  font-size: 1rem;
}

.buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

button {
  border: none;
  border-radius: 14px;
  padding: 14px 20px;
  cursor: pointer;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #6366f1, #38bdf8);
  transition: transform 0.2s ease, filter 0.2s ease;
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  display: grid;
  gap: 12px;
  z-index: 9999;
}

.toast {
  min-width: 280px;
  max-width: 360px;
  padding: 14px 16px;
  border-radius: 16px;
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.32);
  color: #f8fafc;
  animation: toast-in 0.2s ease-out;
}

.toast--info {
  background: linear-gradient(135deg, #475569, #0f172a);
}

.toast--success {
  background: linear-gradient(135deg, #10b981, #22c55e);
}

.toast--error {
  background: linear-gradient(135deg, #ef4444, #f97316);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}