/* ==============================
   Screen 1: Welcome
   ============================== */

#screen-welcome {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 50%, var(--color-primary-50) 100%);
}

.welcome-container {
  text-align: center;
  padding: var(--space-8);
}

.welcome-header {
  margin-bottom: var(--space-12);
}

.logo {
  margin-bottom: var(--space-4);
}

.logo svg {
  filter: drop-shadow(0 4px 6px rgba(37, 99, 235, 0.25));
}

.welcome-title {
  font-size: var(--font-size-4xl);
  color: var(--color-gray-900);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.welcome-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-500);
}

.dashboard-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-8);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  background: var(--color-white);
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border: 1.5px solid var(--color-gray-300);
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-fast);
}

.dashboard-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-50);
  box-shadow: var(--shadow-sm);
}

.welcome-buttons {
  display: flex;
  gap: var(--space-8);
  justify-content: center;
  flex-wrap: wrap;
}

/* ==============================
   Screen 2: Camera
   ============================== */

#screen-camera {
  background: var(--color-gray-900);
}

#screen-camera .screen-header {
  background: rgba(0, 0, 0, 0.6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

#screen-camera .screen-footer {
  background: rgba(0, 0, 0, 0.6);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

#screen-camera .screen-footer .btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.3);
}

#screen-camera .screen-footer .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
}

.camera-area {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  min-height: 0;
  overflow: hidden;
}

.camera-container {
  position: relative;
  width: 100%;
  max-width: 640px;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-gray-800);
  box-shadow: var(--shadow-xl);
}

#camera-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.camera-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  color: var(--color-gray-400);
}

.camera-placeholder p {
  font-size: var(--font-size-sm);
}

.camera-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) 0;
  flex-shrink: 0;
}

/* Scanned section */
.scanned-section {
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-3) var(--space-5);
  max-height: 180px;
  overflow-y: auto;
  flex-shrink: 0;
}

.scanned-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-2);
}

.scanned-title svg {
  opacity: 0.6;
}

.scanned-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
}

.scanned-list {
  /* container for scanned items */
}

#screen-camera .empty-message {
  color: rgba(255, 255, 255, 0.4);
  padding: var(--space-3) 0;
}

#screen-camera .scanned-item {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.1);
}

#screen-camera .scanned-item-name {
  color: rgba(255, 255, 255, 0.9);
}

#screen-camera .scanned-item-id {
  color: rgba(255, 255, 255, 0.5);
}

/* ==============================
   Screen 3: Quantity Input
   ============================== */

#screen-quantity {
  background: var(--color-gray-50);
}

.quantity-list-container {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5) var(--space-6);
  -webkit-overflow-scrolling: touch;
}

.parts-list {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* ==============================
   Screen 4: Results
   ============================== */

#screen-results {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray-50);
}

.results-container {
  text-align: center;
  padding: var(--space-8);
  width: 100%;
  max-width: 600px;
}

.results-header {
  margin-bottom: var(--space-8);
}

.success-icon {
  width: 96px;
  height: 96px;
  border-radius: var(--radius-full);
  background: var(--color-success-light);
  color: var(--color-success);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-6);
  animation: popIn 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes popIn {
  0% { transform: scale(0); }
  100% { transform: scale(1); }
}

.results-message {
  font-size: var(--font-size-2xl);
  color: var(--color-gray-800);
}

.results-list {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin-bottom: var(--space-8);
  text-align: left;
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-5);
}

.result-item + .result-item {
  border-top: 1px solid var(--color-gray-100);
}

.result-name {
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
}

.result-qty {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-900);
}

.results-footer {
  display: flex;
  justify-content: center;
}

/* ==============================
   Responsive adjustments
   ============================== */

@media (max-width: 600px) {
  .welcome-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn-large {
    min-width: 200px;
    min-height: 150px;
    padding: var(--space-6) var(--space-8);
  }

  .btn-large .btn-label {
    font-size: var(--font-size-2xl);
  }

  .welcome-title {
    font-size: var(--font-size-2xl);
  }
}

@media (min-width: 768px) and (orientation: landscape) {
  .camera-container {
    max-height: calc(100vh - 320px);
  }

  .scanned-section {
    max-height: 140px;
  }
}