:root {
  /* Updated minimal and soothing color palette */
  --primary: #4A90E2;          /* Soft sky blue */
  --primary-dark: #357ABD;     /* Deeper blue */
  --secondary: #F7FAFF;        /* Very light blue-white */
  --accent: #64B5F6;          /* Light blue accent */
  --text: #2F3B4C;           /* Soft dark blue-grey */
  --text-light: #78849E;     /* Muted blue-grey */
  --bg: #FFFFFF;             /* Pure white */
  --white: #ffffff;
  --error: #FF8A80;          /* Soft red */
  --success: #81C784;        /* Soft green */
  --bone: #FAFBFF;           /* Very subtle blue tint */
  --surface: #F8FAFD;        /* Light surface color */
  --shadow: 0 4px 20px rgba(74, 144, 226, 0.08);
  --card-shadow: 0 8px 30px rgba(74, 144, 226, 0.05);
  --transition: all 0.2s ease;
  --font-xs: 0.875rem;    /* 14px */
  --font-sm: 1rem;        /* 16px */
  --font-md: 1.125rem;    /* 18px */
  --font-lg: 1.25rem;     /* 20px */
  --font-xl: 1.5rem;      /* 24px */
  --font-2xl: 2rem;       /* 32px */
  --font-3xl: 2.5rem;     /* 40px */
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, var(--bg) 0%, var(--secondary) 100%);
  color: var(--text);
  line-height: 1.6;
  padding-top: 60px;
}

#result {
  margin-top: 10px;
  white-space: pre-wrap;
  font-size: 0.9rem;
  color: var(--text-light);
}

.custom-file-upload {
  display: inline-block;
  padding: 10px 20px;
  border: 2px dashed var(--primary);
  border-radius: 10px;
  cursor: pointer;
  background-color: var(--white);
  color: var(--primary);
  font-size: var(--font-sm);
  transition: var(--transition);
}

.custom-file-upload:hover {
  background-color: var(--primary);
  color: var(--white);
}

button, .primary-button {
  background: var(--primary);
  box-shadow: 0 4px 15px rgba(74, 144, 226, 0.15);
  border-radius: 8px;
  color: var(--white);
  border: none;
  padding: 10px 20px;
  font-size: var(--font-sm);
  cursor: pointer;
  transition: var(--transition);
  margin-top: 10px;
}

button:hover {
  background-color: var(--primary-dark);
}

#uploadContainer {
  background-color: var(--white);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  width: 90%;
  max-width: 1200px;
  margin: 2rem auto;
}

.image-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
  width: 100%;
}

.image-container img {
  width: 100%;
  height: 300px;
  object-fit: contain;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--bone) 0%, var(--secondary) 100%);
  padding: 1rem;
  transition: transform 0.3s ease;
}

.image-container img:hover {
  transform: scale(1.02);
}

/* Remove or comment out the #loadingSpinner styles */

#progressBarContainer {
  width: 100%;
  max-width: 400px;
  margin: 1rem auto;
  background-color: #f3f3f3;
  border-radius: 8px;
  overflow: hidden;
  display: none;
}

#progressBar {
  height: 8px;
  background-color: var(--primary);
  width: 0%;
  transition: width 0.5s ease;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Update nav styles for consistency */
nav {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  opacity: 0.97;  /* Slightly transparent for softness */
  backdrop-filter: blur(10px);
  padding: 1rem;
  text-align: center;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

nav a {
  color: var(--white);
  text-decoration: none;
  padding: 0.5rem 1rem;
  margin: 0 0.5rem;
  border-radius: 0.375rem;
  transition: var(--transition);
  font-size: var(--font-sm);
}

nav a:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
}

/* Modern Navigation Styles */
.main-nav {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 0.8rem 2rem;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-size: var(--font-lg);
  font-weight: 600;
  color: var(--white);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand i {
  font-size: 1.5rem;
}

.nav-links {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.nav-link {
  color: var(--white);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  font-weight: 500;
  position: relative;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.nav-link.active {
  background: rgba(255, 255, 255, 0.15);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--white);
  border-radius: 2px;
}

@media (max-width: 768px) {
  .main-nav {
    padding: 0.8rem 1rem;
  }

  .nav-brand span {
    display: none;
  }

  .nav-links {
    gap: 0.5rem;
  }

  .nav-link {
    padding: 0.4rem 0.8rem;
    font-size: var(--font-xs);
  }
}

#homeContainer {
  background-color: var(--white);
  padding: 30px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  width: 90%;
  max-width: 1000px;
}

.hero-section {
  text-align: center;
  padding: 40px 0;
  background: linear-gradient(135deg, var(--white) 0%, var(--secondary) 100%);
}

.hero-section h1 {
  font-size: var(--font-3xl);
}

.cta-buttons {
  margin: 30px 0;
}

.primary-button, .secondary-button {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 25px;
  text-decoration: none;
  margin: 0 10px;
  transition: var(--transition);
}

.secondary-button {
  background: var(--white);
  border: 1.5px solid var(--primary);
}

.features-preview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid rgba(74, 144, 226, 0.08);
  box-shadow: var(--card-shadow);
  transition: all 0.3s ease;
  padding: 20px;
  text-align: center;
  transform-style: preserve-3d;
  perspective: 2000px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
}

.feature-card h3 {
  font-size: var(--font-lg);
}

.feature-card p {
  font-size: var(--font-sm);
}

.loading {
  position: relative;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2rem;
  height: 2rem;
  border: 3px solid #f3f3f3;
  border-top: 3px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

h1 {
  font-size: var(--font-2xl);
  margin-bottom: 1rem;
  line-height: 1.2;
}

h2 {
  font-size: var(--font-xl);
  margin-bottom: 0.875rem;
  line-height: 1.3;
}

h3 {
  font-size: var(--font-lg);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

p {
  font-size: var(--font-sm);
  line-height: 1.6;
}

.description {
  font-size: var(--font-md);
  color: var(--text-light);
}

/* Tablet-specific styling */
@media (min-width: 768px) {
  .image-container img {
    width: 45%;
  }
}

/* Desktop-specific styling */
@media (min-width: 1024px) {
  body {
    background: linear-gradient(to bottom right, #e6f3ff, #f4f4f9);
  }

  #uploadContainer {
    padding: 30px;
    border-radius: 15px;
  }

  h1 {
    font-size: 2.5rem;
  }

  .custom-file-upload,
  button {
    font-size: 1.2rem;
    padding: 10px 30px;
  }

  .image-container img {
    width: 45%;
  }
}

/* Responsive */
@media (max-width: 768px) {
  nav {
    padding: 0.75rem;
  }
  
  nav a {
    padding: 0.375rem 0.75rem;
    font-size: var(--font-xs);
  }
  
  .container {
    padding: 1rem;
  }

  .image-container {
    grid-template-columns: 1fr;
  }
  
  .image-container img {
    height: 250px;
  }

  h1 {
    font-size: var(--font-xl);
  }

  h2 {
    font-size: var(--font-lg);
  }

  h3 {
    font-size: var(--font-md);
  }

  .hero-section h1 {
    font-size: var(--font-2xl);
  }

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

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Add new modern components */
.glass-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--card-shadow);
}

/* Add depth to feature cards */
.feature-card {
  transform-style: preserve-3d;
  perspective: 2000px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
}

.feature-icon {
  transform: translateZ(50px);
  box-shadow: 0 0 30px rgba(74, 144, 226, 0.2);
}

.footer {
    background: var(--primary-dark);
    color: var(--white);
    text-align: center;
    padding: 1rem;
    position: relative;
    bottom: 0;
    width: 100%;
    margin-top: 2rem;
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Add or update mobile optimization styles */
@media (max-width: 768px) {
  body {
    padding-top: 50px;
  }

  nav {
    padding: 0.5rem;
  }

  nav a {
    padding: 0.3rem 0.5rem;
    font-size: 0.9rem;
    margin: 0 0.3rem;
  }

  .container {
    width: 95%;
    padding: 1rem;
  }

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.2rem;
  }

  p {
    font-size: 0.9rem;
  }

  .footer {
    padding: 1rem 0.5rem;
  }
}

@media (max-width: 480px) {
  nav a {
    padding: 0.2rem 0.4rem;
    font-size: 0.8rem;
    margin: 0 0.2rem;
  }
}

/* Mobile Navigation Styles */
.nav-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    background: none;
    border: none;
    color: white;
    padding: 0.5rem;
    margin-right: 1rem;
}

.nav-links {
    display: flex;
    gap: 1rem;
}

@media (max-width: 768px) {
    nav {
        justify-content: space-between;
        padding: 0.5rem 1rem;
        align-items: center;
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-dark);
        flex-direction: column;
        padding: 1rem;
        gap: 0.5rem;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        display: flex;
    }

    nav a {
        padding: 0.8rem;
        width: 100%;
        text-align: center;
        margin: 0;
        border-radius: 4px;
    }

    nav a:hover {
        background: rgba(255, 255, 255, 0.1);
    }
}