/* ===== RESET + FULLSCREEN ===== */
html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #000;
  font-family: monospace;
  overflow: hidden; /* 🔥 no mobile scroll shift */
}

/* ===== CENTER WRAPPER ===== */
body {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* ===== PANEL ===== */
.led-frame {
  width: 100%;
  max-width: 960px;
  box-sizing: border-box;
  padding: 24px;
  background: radial-gradient(circle at 1px 1px, #1a1a1a 1px, #000 1px);
  background-size: 10px 10px;
  border: 4px solid #004a88;
  box-shadow: 0 0 20px #0077ff, 0 0 30px #ffd200;
}

/* ===== HEADER ===== */
.led-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.logo {
  height: 64px;
  filter: drop-shadow(0 0 6px #0077ff) drop-shadow(0 0 10px #ffd200);
}

.title {
  color: #ffd200;
  font-size: 26px;
  text-shadow: 0 0 6px #0077ff;
}

/* ===== CONTENT ===== */
.led-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.field label {
  color: #9ad0ff;
  font-size: 15px;
}

input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px;
  font-size: 22px;
  background: #000;
  color: #ffd200;
  border: 2px solid #004a88;
}

button {
  grid-column: span 2;
  padding: 16px;
  font-size: 22px;
  background: linear-gradient(90deg, #004a88, #ffd200);
  border: none;
  cursor: pointer;
  color: #000;
}

/* ===== MOBILE FIX ===== */
@media (max-width: 640px) {
  body {
    align-items: flex-start;
  }

  .led-frame {
    max-width: 100%;
    height: 100%;
    border-width: 3px;
    padding: 16px;
  }

  .logo {
    height: 42px;
  }

  .title {
    font-size: 16px;
  }

  .led-content {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  input {
    font-size: 18px;
    padding: 10px;
  }

  button {
    font-size: 18px;
    padding: 12px;
  }
}