/* Root Variables */
:root {
  --primary: #4361ee;
  --primary-dark: #3a56d4;
  --light: #f8f9fa;
  --dark: #212529;
  --gray: #6c757d;
  --light-gray: #e9ecef;
  --success: #4bb543;
  --error: #ff3333;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --transition: all 0.2s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.4;
  color: var(--dark);
  background: #fff;
}

/* Header - Thicker */
.sticky-header {
  background: #fff;
  padding: 0.8rem 1rem;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px solid var(--primary);
}

.logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  cursor: pointer;
}

.hamburger-menu {
  display: none;
  background: none;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  padding: 0.25rem;
}

.nav-links {
  display: flex;
  gap: 1.2rem;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--dark);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.3rem 0;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--primary);
}

/* Main Content */
main {
  min-height: calc(100vh - 120px);
  padding: 0.5rem;
}

.compress-image {
  max-width: 800px;
  margin: 0.5rem auto;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
}

.compress-image h1 {
  text-align: center;
  margin: 0.75rem 0 0.5rem;
  font-size: 1.2rem;
  color: var(--primary);
  padding: 0 1rem;
}

.compress-image > p {
  text-align: center;
  color: var(--gray);
  margin-bottom: 1rem;
  font-size: 0.85rem;
  padding: 0 1rem;
}

/* Upload Section */
.upload-container {
  margin-bottom: 0.75rem;
  cursor: pointer;
  padding: 0.75rem;
}

.upload-box {
  border: 2px dashed var(--primary);
  border-radius: var(--radius);
  padding: 1.5rem 1rem;
  text-align: center;
  background: rgba(67,97,238,0.02);
  position: relative;
  transition: var(--transition);
}

.upload-box:hover {
  background: rgba(67,97,238,0.04);
}

.upload-box h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.upload-box p {
  font-size: 0.8rem;
  color: var(--gray);
  margin-bottom: 0.2rem;
}

.upload-box p span {
  color: var(--primary);
  font-weight: 600;
}

#imageInput {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.supported-formats {
  font-size: 0.75rem;
  color: var(--gray);
  text-align: center;
  margin-top: 0.5rem;
}

/* Compression Options - Compact Horizontal */
.compression-options {
  background: var(--light);
  padding: 1rem;
  margin: 0;
}

.option-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: nowrap;
}

.option-row label {
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  color: var(--dark);
}

.target-size-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

#targetSize {
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--light-gray);
  border-radius: var(--radius);
  font-size: 0.85rem;
  width: 100px;
  text-align: center;
}

#targetSize:focus {
  outline: none;
  border-color: var(--primary);
}

#compressBtn {
  padding: 0.5rem 1.2rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

#compressBtn:hover:not(:disabled) {
  background: var(--primary-dark);
}

#compressBtn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Ad Space */
.ad-space {
  min-height: 100px;
  background: var(--light);
  margin: 0.5rem 0;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray);
  font-size: 0.8rem;
}

/* Preview Container */
#previewContainer {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

#loadingIndicator {
  text-align: center;
  padding: 1rem;
  font-size: 0.85rem;
  color: var(--primary);
  background: var(--light);
  border-radius: var(--radius);
  margin: 0.5rem 1rem;
}

#loadingIndicator:not([hidden]) {
  display: block;
}

/* Feature Description */
.featuredesc {
  max-width: 800px;
  margin: 1rem auto 0;
  padding: 0 1rem;
}

.featuredesc p {
  margin-bottom: 0.8rem;
  font-size: 0.85rem;
  line-height: 1.4;
}

.featuredesc strong {
  font-weight: 600;
}

.featuredesc center {
  margin: 1rem 0;
}

.Compressimage {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.featuredesc h2 {
  color: var(--dark);
  margin: 1.2rem 0 0.8rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.steps {
  padding-left: 1rem;
  margin-bottom: 1.2rem;
}

.steps li {
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
}

.featuredesc ul {
  padding-left: 1rem;
  margin-bottom: 1.2rem;
}

.featuredesc ul li {
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
}

.faq {
  background: var(--light);
  padding: 1rem;
  border-radius: var(--radius);
  margin: 1.2rem 0;
}

.faq p {
  margin-bottom: 0.6rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--light-gray);
  font-size: 0.8rem;
}

.faq p:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

/* Internal Links - Light Horizontal Boxes */
.internal-links {
  max-width: 800px;
  margin: 1.5rem auto 0.5rem;
  padding: 0 1rem;
}

.internal-links h2 {
  text-align: center;
  margin-bottom: 0.8rem;
  font-size: 1rem;
  color: var(--dark);
}

.internal-links-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  list-style: none;
}

.internal-links a {
  display: block;
  padding: 0.5rem 0.8rem;
  background: var(--light);
  color: var(--dark);
  text-decoration: none;
  border-radius: var(--radius);
  font-size: 0.75rem;
  font-weight: 500;
  text-align: center;
  transition: var(--transition);
  line-height: 1.2;
  border: 1px solid var(--light-gray);
}

.internal-links a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}

/* Footer */
.main-footer {
  background: var(--light);
  padding: 1rem;
  margin-top: 1.5rem;
  border-top: 1px solid var(--light-gray);
}

.container {
  max-width: 800px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  margin-bottom: 0.8rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.4rem;
  font-size: 1rem;
}

.footer-about p {
  font-size: 0.8rem;
  color: var(--gray);
  line-height: 1.4;
}

.footer-col h3 {
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.3rem;
}

.footer-col a {
  text-decoration: none;
  color: var(--gray);
  font-size: 0.8rem;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 0.8rem;
  border-top: 1px solid var(--light-gray);
  color: var(--gray);
  font-size: 0.75rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .compress-image {
    margin: 0.25rem auto;
    min-height: 50vh;
    display: flex;
    flex-direction: column;
  }

  .sticky-header {
    padding: 0.6rem 0.75rem;
  }
  
  .hamburger-menu {
    display: block;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 0.75rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    gap: 0.6rem;
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .nav-links a {
    padding: 0.4rem 0;
    width: 100%;
    text-align: center;
    font-size: 0.8rem;
  }
  
  main {
    padding: 0.25rem;
  }
  
  .compress-image h1 {
    font-size: 1.1rem;
    margin: 0.5rem 0 0.3rem;
  }
  
  .compress-image > p {
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
  }
  
  .upload-container {
    padding: 0.5rem;
    margin-bottom: 0.5rem;
  }
  
  .upload-box {
    padding: 1rem 0.75rem;
  }
  
  /* Keep horizontal layout on mobile */
  .option-row {
    flex-wrap: nowrap;
    gap: 0.4rem;
  }
  
  .target-size-group {
    flex: 1;
  }
  
  #targetSize {
    width: 80px;
    flex: none;
  }
  
  #compressBtn {
    padding: 0.5rem 1rem;
    flex: none;
  }
  
  #previewContainer {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .internal-links-grid {
    gap: 0.3rem;
  }
  
  .internal-links a {
    padding: 0.4rem 0.6rem;
    font-size: 0.7rem;
  }
  
  .featuredesc, .internal-links {
    padding: 0 0.75rem;
  }
  
  .featuredesc h2 {
    font-size: 1rem;
    margin: 1rem 0 0.6rem;
  }
}

@media (max-width: 480px) {
  .sticky-header {
    padding: 0.5rem 0.5rem;
  }
  
  .logo {
    font-size: 1.1rem;
  }
  
  .compress-image {
    min-height: 55vh;
  }
  
  .featuredesc {
    padding: 0 0.5rem;
  }
  
  .main-footer {
    padding: 0.75rem 0.5rem;
    margin-top: 1rem;
  }
  
  .internal-links-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.3rem;
  }
  
  .internal-links a {
    width: 100%;
    text-align: center;
    padding: 0.4rem 0.3rem;
    font-size: 0.65rem;
  }
  
  /* Ensure horizontal layout on very small screens */
  .option-row {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .target-size-group {
    width: auto;
  }
  
  #compressBtn {
    width: auto;
    margin-top: 0;
  }
}