@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap');

    :root {
      --primary-color: #1e40af; /* Indigo 700 */
      --primary-color-dark: #1e3a8a;
      --gray-light: #f9fafb;
      --gray-medium: #6b7280;
      --gray-dark: #111827;
      --white: #ffffff;
      --border-color: #e5e7eb;
      --transition-fast: 0.25s ease-in-out;
      --background-color: var(--gray-light);
      --text-color: var(--gray-dark);
      --link-color: var(--primary-color);
      --link-hover-color: var(--primary-color-dark);
      --input-background: var(--white);
      --input-border-color: var(--border-color);
      --button-background: var(--primary-color);
      --button-hover-background: var(--primary-color-dark);
      --box-shadow-color: rgba(0, 0, 0, 0.1);
    }

    .dark-theme {
      --background-color: #121212;
      --text-color: #f3f4f6;
      --link-color: #60a5fa; 
      --link-hover-color: #3b82f6;
      --input-background: #1f2937;
      --input-border-color: #374151;
      --button-background: #2563eb;
      --button-hover-background: #1d4ed8;
      --box-shadow-color: rgba(255 255 255 / 0.1);
    }

    *, *::before, *::after {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'Inter', sans-serif;
      background-color: var(--background-color);
      color: var(--text-color);
      line-height: 1.6;
      scroll-behavior: smooth;
      transition: background-color 0.3s ease, color 0.3s ease;
    }

    a {
      color: var(--link-color);
      text-decoration: none;
      font-weight: 600;
      transition: color var(--transition-fast);
    }

    a:hover,
    a:focus {
      color: var(--link-hover-color);
      outline: none;
      text-decoration: underline;
    }

    /* Container */
    .container {
      max-width: 900px;
      margin: 0 auto;
      padding: 0 1rem;
    }

    /* Header */
    header {
      position: fixed;
      top: 0; left: 0; right: 0;
      background: var(--input-background);
      box-shadow: 0 1px 4px var(--box-shadow-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1rem 1.5rem;
      z-index: 1000;
      font-weight: 700;
      font-size: 1.2rem;
      transition: background-color 0.3s ease;
      flex-wrap: wrap;
    }

    header .logo {
      color: var(--link-color);
      font-size: 1.4rem;
      letter-spacing: 0.1em;
      user-select: none;
      margin-right: 1rem;
      flex-shrink: 0;
    }

    nav {
      flex-grow: 1;
    }

    nav a {
      margin-left: 1.5rem;
      font-size: 0.95rem;
      color: var(--text-color);
    }

    nav a:hover,
    nav a:focus {
      color: var(--link-color);
      outline: none;
    }

    .header-actions {
      display: flex;
      gap: 0.75rem;
      flex-shrink: 0;
      margin-left: auto;
      margin-top: 0.5rem;
    }

    .btn,
    #themeToggleBtn {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      background: var(--button-background);
      border: none;
      color: var(--white);
      padding: 0.4rem 0.85rem;
      border-radius: 0.375rem;
      font-weight: 600;
      font-size: 0.9rem;
      cursor: pointer;
      transition: background-color 0.3s ease;
      user-select: none;
      text-decoration: none;
      white-space: nowrap;
      border: 2px solid transparent;
    }

    .btn:hover,
    .btn:focus,
    #themeToggleBtn:hover,
    #themeToggleBtn:focus {
      background: var(--button-hover-background);
      outline: none;
      border-color: var(--white);
      text-decoration: none;
      color: var(--white);
    }

    /* Icons for buttons */
    .icon {
      width: 16px;
      height: 16px;
      fill: currentColor;
    }

    main {
      padding-top: 90px;
      padding-bottom: 3rem;
      transition: background-color 0.3s ease, color 0.3s ease;
    }

    /* Section Title */
    h2 {
      font-weight: 700;
      font-size: 1.9rem;
      border-bottom: 3px solid var(--link-color);
      padding-bottom: 0.3rem;
      margin-bottom: 1.25rem;
      color: var(--link-color);
      transition: color 0.3s ease;
    }

    /* About Section */
    #about {
      display: flex;
      gap: 2rem;
      align-items: center;
      flex-wrap: wrap;
      box-sizing: border-box;
      margin-top: 15%;
    }
    #about p {
      font-size: 1.1rem;
      max-width: 500px;
      color: var(--text-color);
      line-height: 1.7;
      margin: 0;
      transition: color 0.3s ease;
      flex: 1 1 300px;
    }
    #about-photo {
      width: 280px;
      height: 300px;
      border-radius: 50%;
      /* object-fit: cover; */
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      flex-shrink: 0;
      background: var(--input-background);
      border: 2px solid var(--link-color);
      transition: box-shadow 0.3s ease;
    }
    #about-photo:hover {
      box-shadow: 0 6px 20px rgba(30,64,175,0.6);
    }

    /* Skills */
    .skills-list {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 1rem;
      max-width: 680px;
      margin-bottom: 3rem;
      align-items: start;
    }

    .skill {
      background: var(--input-background);
      padding: 0.85rem 1.1rem;
      border-radius: 0.375rem;
      border: 1px solid var(--input-border-color);
      display: flex;
      align-items: center;
      color: var(--text-color);
      font-weight: 600;
      transition: box-shadow var(--transition-fast), background-color 0.3s ease, border-color 0.3s ease;
      user-select: none;
      cursor: default;
      width: 100%; 
    }

    .skill-icon {
      width: 24px;
      margin-right: 0.8rem;
      fill: var(--link-color);
      flex-shrink: 0;
      transition: fill 0.3s ease;
    }

    /* Projects */
    .projects-grid,.certifications-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
      gap: 2rem;
      margin-bottom: 3rem;
    }


    .project-card {
      background: var(--input-background);
      border-radius: 0.5rem;
      box-shadow: 0 1px 6px var(--box-shadow-color);
      display: flex;
      flex-direction: column;
      transition: box-shadow var(--transition-fast), background-color 0.3s ease;
    }

    .project-card:hover,
    .project-card:focus-within {
      box-shadow: 0 6px 18px rgba(99 179 237 / 0.5);
      outline: none;
      background-color: var(--link-color);
      color: var(--input-background);
    }
    .project-card:hover .project-title,
    .project-card:focus-within .project-title {
      color: var(--white);
    }
    .project-card:hover .project-description,
    .project-card:focus-within .project-description,
    .project-card:hover .project-link,
    .project-card:focus-within .project-link {
      color: var(--white);
    }

    .project-card:hover #view-certificate,
    .project-card:focus-within #view-certificate {
      color: var(--white);
    }

    .project-image {
      width: 100%;
      height: 160px;
      object-fit: cover;
      border-radius: 0.5rem 0.5rem 0 0;
      user-select: none;
      pointer-events: none;
      transition: filter 0.3s ease;
    }
    .dark-theme .project-image {
      filter: brightness(0.9);
    }

    .project-content {
      padding: 1rem 1.2rem 1.4rem;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: color 0.3s ease;
    }

    .project-title {
      font-size: 1.2rem;
      font-weight: 700;
      margin: 0 0 0.5rem;
      color: var(--link-color);
      transition: color 0.3s ease;
    }

    .project-description {
      font-size: 0.95rem;
      color: var(--text-color);
      flex-grow: 1;
      margin: 0;
      line-height: 1.4;
      transition: color 0.3s ease;
    }

    .project-links {
      margin-top: 1rem;
      display: flex;
      gap: 1.25rem;
      flex-wrap: wrap;
    }

    .project-link {
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--link-color);
      align-self: flex-start;
      transition: color var(--transition-fast);
      white-space: nowrap;
      border-bottom: 1.5px solid transparent;
    }

    .project-link:hover,
    .project-link:focus {
      color: var(--link-hover-color);
      outline: none;
      border-bottom-color: var(--link-hover-color);
    }

    /* Contact */
    #contact {
      max-width: 580px;
      margin: 0 auto 3rem;
      background: var(--input-background);
      padding: 2rem 2.25rem;
      border-radius: 0.5rem;
      box-shadow: 0 1px 8px var(--box-shadow-color);
      transition: background-color 0.3s ease, box-shadow 0.3s ease;
    }

    #contact h2 {
      margin-bottom: 1.5rem;
    }

    #contact form {
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    #contact label {
      font-weight: 600;
      font-size: 1rem;
      color: var(--text-color);
      user-select: none;
      transition: color 0.3s ease;
    }

    #contact input,
    #contact textarea {
      font-family: 'Inter', sans-serif;
      font-size: 1rem;
      padding: 0.65rem 0.85rem;
      border: 1px solid var(--input-border-color);
      border-radius: 0.375rem;
      transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color 0.3s ease;
      resize: vertical;
      background-color: var(--background-color);
      color: var(--text-color);
    }

    #contact input::placeholder,
    #contact textarea::placeholder {
      color: var(--gray-medium);
      opacity: 0.7;
    }

    #contact input:focus,
    #contact textarea:focus {
      outline: none;
      border-color: var(--link-color);
      box-shadow: 0 0 4px var(--link-color);
      background-color: var(--input-background);
    }

    #contact button {
      background: var(--button-background);
      color: var(--white);
      border: none;
      padding: 0.75rem 1rem;
      font-weight: 700;
      font-size: 1rem;
      border-radius: 0.375rem;
      cursor: pointer;
      transition: background-color var(--transition-fast);
      user-select: none;
    }

    #contact button:hover,
    #contact button:focus {
      background: var(--button-hover-background);
      outline: none;
    }

    #msgStatus {
      font-size: 1rem;
      min-height: 20px;
      user-select: none;
      transition: color 0.3s ease;
    }

    /* Footer */
    footer {
      text-align: center;
      padding: 2rem 1rem;
      color: var(--gray-medium);
      font-size: 0.9rem;
      border-top: 1px solid var(--input-border-color);
      user-select: none;
      transition: color 0.3s ease, border-color 0.3s ease;
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
    }
    footer a {
      color: var(--link-color);
      font-weight: 600;
    }
    footer a:hover,
    footer a:focus {
      color: var(--link-hover-color);
      outline: none;
      text-decoration: underline;
    }

    /* Responsive */
    @media (max-width: 700px) {
      nav a {
        margin-left: 1rem;
        font-size: 0.9rem;
      }

      .skills-list {
        flex-direction: column;
        gap: 0.8rem;
      }

      .skill {
        flex: 1 0 100%;
      }

      .project-image {
        height: 140px;
      }

      .header-actions {
        margin-top: 0.75rem;
        width: 100%;
        justify-content: flex-end;
        gap: 0.55rem;
      }

      #about {
        flex-direction: column;
        align-items: center;
      }

      #about p {
        max-width: 100%;
        text-align: center;
      }

      #about-photo {
        width: 140px;
        height: 140px;
      }
    }

    @media (max-width: 420px) {
      header {
        flex-direction: column;
        gap: 0.5rem;
        font-size: 1rem;
      }

      nav a {
        margin-left: 0.75rem;
      }
    }
.social-icons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px; 
  margin-top: 1rem;
}

.social-icons a {
  color: var(--link-color);
  transition: color 0.3s ease;
}

.social-icons a:hover {
  color: var(--link-hover-color);
}
.education-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.education-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--input-background);
  padding: 1rem 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 1px 6px var(--box-shadow-color);
}

.edu-left h3 {
  margin: 0 0 0.25rem 0;
  font-size: 1.2rem;
  color: var(--link-color);
}

.edu-left p {
  margin: 0;
  font-size: 1rem;
  color: var(--text-color);
}

.edu-right p {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--link-color);
}
.project-card:hover .project-links a {
  color: var(--white);
}