html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: rgba(0, 0, 0, 0) !important;
  font-family: 'Segoe UI', sans-serif;
  -webkit-mask-image: radial-gradient(white, black);
  mask-image: radial-gradient(white, black);
}

.ui-container {
  position: absolute;
  top: 50%;
  right: 2%;
  transform: translateY(-50%);
  width: 460px;
}


#main-menu {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 100%;
  align-items: center;
}

.locker-card {
  background: linear-gradient(145deg, rgba(60, 10, 50, 0.65), rgba(27, 27, 27, 0.9));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 2px solid rgba(107, 4, 92, 0.4);
  border-radius: 18px;
  padding: 30px;
  color: white;
  display: flex;
  flex-direction: column;
  gap: 30px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

h1, h2 {
  text-align: center;
  color: #ffffff;
  font-weight: 600;
  margin-bottom: 8px;
}

.menu-btn,
.action-btn,
.back-btn,
.size-btn,
.confirm-buttons button {
  padding: 18px 16px;
  background-color: rgba(255, 255, 255, 0.05);
  border: none;
  border-radius: 10px;
  color: white;
  font-size: 15px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
  width: 100%;
  margin-bottom: 12px;
  box-shadow: none;
}

.menu-btn:hover,
.action-btn:hover,
.back-btn:hover,
.size-btn:hover,
.confirm-buttons button:hover {
  background-color: rgba(255, 255, 255, 0.12);
  transform: scale(1.01);
}

.size-btn.active {
  background: #6b045c !important;
  color: #fff;
  font-weight: bold;
}

.action-btn.danger {
  background-color: rgba(255, 60, 60, 0.15);
  color: #ff8080;
}

.action-btn.danger:hover {
  background-color: rgba(255, 60, 60, 0.25);
}

.section {
  display: none;
  flex-direction: column;
  gap: 14px;
}

.size-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
}

.duration-select {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
  color: #fff;
  font-size: 14px;
}

.check-remaining-fields {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

select {
  padding: 18px 16px;
  background-color: rgba(255, 255, 255, 0.05);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  width: 100%;
  margin-bottom: 12px;
  transition: background 0.2s;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg fill='white' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 16px;
  padding-right: 40px;
}

select:hover,
select:focus {
  background-color: rgba(255, 255, 255, 0.1);
  outline: none;
}


select option {
  background-color: #1e1e1e; 
  color: white;
  padding: 10px;
}


#remaining-time-display {
  font-size: 14px;
  color: #f0f0f0;
  padding-top: 6px;
  text-align: center;
}


.duration-select select {
  padding: 10px;
  border-radius: 12px;
  border: none;
  background: rgba(255, 255, 255, 0.08);
  color: white;
  font-size: 14px;
  outline: none;
  transition: background 0.2s;
}

.duration-select select:focus {
  background: rgba(255, 255, 255, 0.12);
}


input {
  width: 91%;
  padding: 18px;
  border-radius: 12px;
  border: none;
  background: rgba(255, 255, 255, 0.08);
  color: white;
  font-size: 14px;
  outline: none;
  transition: background 0.2s;
}

input:focus {
  background: rgba(255, 255, 255, 0.12);
}

.info-text {
  text-align: center;
  color: #ccc;
  font-size: 14px;
  padding-top: 4px;
}

.locker-notify {
  position: fixed;
  top: 20px;
  right: 20px;
  background-color: rgba(107, 4, 92, 0.95);
  color: white;
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
  z-index: 9999;
  box-shadow: 0 0 14px rgba(0, 0, 0, 0.4);
  animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.confirm-box {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(145deg, rgba(60, 10, 50, 0.88), rgba(27, 27, 27, 0.95));
  backdrop-filter: blur(16px);
  padding: 30px 28px;
  border-radius: 16px;
  color: white;
  z-index: 10000;
  width: 340px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: center;
  box-shadow: 0 0 24px rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(107, 4, 92, 0.4);
}

.confirm-box input {
  padding: 12px;
  border-radius: 10px;
  border: none;
  background: rgba(255, 255, 255, 0.08);
  color: white;
  font-size: 15px;
  outline: none;
  transition: background 0.2s;
}

.confirm-box input:focus {
  background: rgba(255, 255, 255, 0.12);
}

.confirm-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.confirm-box.hidden {
  display: none;
}

.hidden {
  display: none;
}

button {
  pointer-events: auto;
}