/*
  Loading Screen - สอดคล้องกับ UI หลัก
  - พื้นหลัง #f8f9fa เหมือนหน้าอื่น
  - โทนสีเรียบ ไม่ใช้ gradient
*/

@import url('https://fonts.googleapis.com/css2?family=Prompt:wght@400;500;600&display=swap');

:root {
  --loader-bg: #f8f9fa;
  --loader-primary: #495057;
  --loader-border: #dee2e6;
  --loader-text: #212529;
  --loader-text-muted: #6c757d;
  --spinner-size: 40px;
}

.app-loading {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--loader-bg);
  z-index: 99999;
  font-family: 'Prompt', system-ui, sans-serif;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.spinner-container {
  margin-bottom: 20px;
}

.spinner {
  width: var(--spinner-size);
  height: var(--spinner-size);
  border: 3px solid var(--loader-border);
  border-top-color: var(--loader-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.text-container {
  text-align: center;
}

.loading-text {
  font-size: 0.875rem;
  color: var(--loader-text-muted);
  margin: 0;
}

.progress-container {
  width: 160px;
  height: 2px;
  background: var(--loader-border);
  border-radius: 2px;
  margin-top: 12px;
  overflow: hidden;
}

.progress-bar {
  width: 30%;
  height: 100%;
  background: var(--loader-primary);
  border-radius: 2px;
  animation: progress 1.5s ease-in-out infinite;
}

.version-badge {
  position: absolute;
  bottom: 20px;
  font-size: 0.75rem;
  color: var(--loader-text-muted);
  opacity: 0.7;
}

/* Animations */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes progress {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(400%); }
}

/* Fade Out */
.fade-out {
  opacity: 0;
  visibility: hidden;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .spinner,
  .progress-bar {
    animation: none;
  }
  .progress-bar {
    width: 50%;
    transform: translateX(50%);
  }
}

@media (max-width: 480px) {
  :root {
    --spinner-size: 32px;
  }
  .progress-container {
    width: 120px;
  }
}