:root {
  --color-nav: #2C3E50;         /* Dark navy for navigation */
  --color-accent: #E67E22;      /* Vibrant orange accent */
  --color-light-bg: #F4F7FA;    /* Light background */
  --color-gray-text: #555;
}

/* Global */
body {
  margin: 0;
  background: var(--color-light-bg);
  font-family: Arial, sans-serif;
  color: var(--color-gray-text);
}
h1, h2 {
  color: var(--color-nav);
}
a {
  text-decoration: none;
}

/* Navbar */
.bg-nav {
  background-color: var(--color-nav) !important;
}

/* Fade-in animation */
.fade-in {
  animation: fadeIn 0.8s ease-in-out;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Card hover effect */
.card {
  transition: transform 0.2s;
}
.card:hover {
  transform: scale(1.03);
}
.card {
  cursor: pointer;
}

/* Buttons */
.btn-primary {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-primary:hover, .btn-primary:focus {
  background-color: #d35400;
  border-color: #d35400;
}
/* Secondary button can remain default or you can override if desired */

/* Progress bar */
.progress-bar {
  background-color: var(--color-accent);
}

/* Upload page styles */
.dropzone {
  border: 2px dashed var(--color-accent);
  border-radius: 10px;
  padding: 40px;
  text-align: center;
  background: #fff;
  cursor: pointer;
  transition: background 0.3s, border-color 0.3s;
}
.dropzone.dragover {
  background: #eef7fc;
  border-color: var(--color-nav);
}
.dropzone input {
  display: none;
}
.dropzone span {
  display: block;
  margin-top: 10px;
  color: #666;
}
.preview {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.preview img {
  height: 120px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid #ddd;
}
.log {
  margin-top: 15px;
  font-size: 14px;
  color: #333;
}