/* Certificate Page CSS
 * Based on the portfolio design specifications
 */

/* Base Styles & Variables */
:root {
    --color-primary: #1A2B47;      /* Deep navy */
    --color-secondary: #26A69A;    /* Teal accent */
    --color-background: #F5F7FA;   /* Light gray */
    --color-text: #333333;         /* Dark charcoal */
    --color-highlight: #F39C12;    /* Subtle orange */
    --color-white: #FFFFFF;
    --color-light-gray: #E0E5EC;
    
    --shadow-soft: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 4px 15px rgba(0, 0, 0, 0.1);
    
    --border-radius-small: 4px;
    --border-radius-medium: 8px;
    
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
  }
  
  /* Global Reset & Base */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
  }
  
  h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    color: var(--color-primary);
  }
  
  a {
    text-decoration: none;
    color: var(--color-secondary);
    transition: color var(--transition-fast);
  }
  
  a:hover {
    color: var(--color-highlight);
  }
  
  /* Container and Layout */
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
  }

  .page-header {
    text-align: center;
    margin: 5rem auto 4rem;
    padding: 2rem 0;
    position: relative;
    background: white;
    /* background: linear-gradient(to right, rgba(var(--color-primary-rgb), 0.05), rgba(var(--color-secondary-rgb), 0.05)); */
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
    overflow: hidden;
  }
  
  .page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--color-secondary);
  }
  
  .page-header h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
    letter-spacing: -0.5px;
    color: var(--color-secondary);
    font-weight: 700;
  }
  
  .page-header h1::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    color: var(--color-secondary);
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--color-secondary);
    border-radius: 3px;
  }
  
  .subtitle {
    color: var(--color-text);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 1.5rem auto 0;
    font-weight: 300;
    line-height: 1.6;
  }
  
  .back-link {
    position: absolute;
    left: 2rem;
    top: 2rem;
    display: flex;
    align-items: center;
    padding: 0.6rem 1rem;
    color: var(--color-primary);
    font-weight: 500;
    transition: all 0.3s ease;
    background-color: #edecec;
    border-radius: 30px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(var(--color-primary-rgb), 0.2);
  }
  
  .back-link:hover {
    transform: translateX(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    background-color: var(--color-secondary);
    color: white;
  }
  
  .back-link i {
    margin-right: 8px;
    transition: transform 0.3s ease;
  }
  
  .back-link:hover i {
    transform: translateX(-3px);
  }
  
  @media (max-width: 768px) {
    
    .back-link {
      position: relative;
      width: fit-content;
      margin-bottom: 1.7rem;
      top: 1rem;
      left: 0rem;
    }

    .page-header {
      margin: 3rem auto;
      padding: 3rem 1rem 2rem;
    }
    
    .page-header h1 {
      font-size: 2.2rem;
    }
  }
  
  /* Certificate Grid */
  .certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
  }
  
  /* Certificate Card */
  .certificate-card {
    background-color: var(--color-white);
    border-radius: var(--border-radius-medium);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    transition: transform var(--transition-medium);
  }
  
  .certificate-card:hover {
    transform: translateY(-5px);
  }
  
  .certificate-image {
    position: relative;
    height: 200px;
    overflow: hidden;
  }
  
  .certificate-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-medium);
  }
  
  .certificate-card:hover .certificate-image img {
    transform: scale(1.05);
  }
  
  .certificate-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(26, 43, 71, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-medium);
  }
  
  .certificate-card:hover .certificate-overlay {
    opacity: 1;
  }
  
  .verify-btn {
    background-color: var(--color-secondary);
    color: var(--color-white);
    padding: 10px 20px;
    border-radius: var(--border-radius-small);
    font-weight: 600;
    transition: background-color var(--transition-fast);
    position: relative;
    z-index: 10;
  }
  
  .verify-btn:hover {
    background-color: var(--color-highlight);
    color: var(--color-white);
  }
  
  .verify-btn i {
    margin-right: 5px;
  }
  
  .certificate-details {
    padding: 1.5rem;
  }
  
  .certificate-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
  }
  
  .certificate-issuer, 
  .certificate-date, 
  .certificate-id {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
  }
  
  .certificate-issuer i, 
  .certificate-date i, 
  .certificate-id i {
    color: var(--color-secondary);
    width: 20px;
    margin-right: 8px;
  }
  
  .certificate-tags {
    margin: 1rem 0;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }
  
  .certificate-tag {
    font-size: 0.8rem;
    background-color: rgba(38, 166, 154, 0.1);
    color: var(--color-secondary);
    padding: 4px 10px;
    border-radius: var(--border-radius-small);
  }
  
  .certificate-description {
    margin-top: 1rem;
    font-size: 0.95rem;
    color: var(--color-text);
    opacity: 0.9;
  }
  
  /* Footer */
  .site-footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--color-text);
    opacity: 0.7;
    font-size: 0.9rem;
  }
  
  /* Responsive Styles */
  @media (max-width: 768px) {
    .container {
      padding: 1.5rem;
    }
    
    .page-header h1 {
      font-size: 2rem;
    }
    
    .certificates-grid {
      grid-template-columns: 1fr;
    }
  }
  
  @media (max-width: 480px) {
    .container {
      padding: 1rem;
    }
    
    .page-header h1 {
      font-size: 1.75rem;
    }
    
    .certificate-image {
      height: 180px;
    }
    
    .certificate-title {
      font-size: 1.1rem;
    }
    
    .certificate-issuer, 
    .certificate-date, 
    .certificate-id,
    .certificate-description {
      font-size: 0.9rem;
    }
  }

  .image-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;
  }
  
  .background-blur {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-position: center;
    background-size: cover;
    filter: blur(10px);
    transform: scale(1.1); /* Slightly larger to cover blur edges */
    z-index: 1;
  }
  
  .responsive-image {
    max-width: 100%;
    max-height: 100%;
    transition: width 0.3s, height 0.3s; /* Optional: smooth transition */
    position: relative;
    z-index: 2; /* Ensure image is above the blurred background */
  }