/* Universal reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  /* Base styles */
  html {
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    scroll-behavior: smooth;
  }
  
  body {
    background-color: #f5f7fa;
    padding: 40px 20px;
    color: #000;
    transition: background-color 0.3s ease, color 0.3s ease;
  }
  
  /* Main container */
  .main-container {
    background-color: #fff;
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    box-shadow: 5px 9px 20px rgba(0, 0, 0, 0.15);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
  }
  
  /* Hamburger Menu Styles */
  .hamburger-menu {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
  }

  .hamburger-toggle {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #1e2939, #465f85);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
  }

  .hamburger-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    background: linear-gradient(135deg, #2a3545, #5a7199);
  }

  .hamburger-toggle span {
    width: 24px;
    height: 3px;
    background: #fff;
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .hamburger-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }

  .hamburger-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
  }

  .hamburger-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }

  .hamburger-dropdown {
    position: absolute;
    top: 60px;
    right: 0;
    width: 350px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
    pointer-events: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .hamburger-menu.active .hamburger-dropdown {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: all;
  }

  .menu-item {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
  }

  .menu-item:last-child {
    border-bottom: none;
    border-radius: 0 0 16px 16px;
  }

  .menu-item:first-child {
    border-radius: 16px 16px 0 0;
  }

  .menu-item:hover {
    background: linear-gradient(135deg, rgba(30, 41, 57, 0.05), rgba(70, 95, 133, 0.05));
  }

  .menu-item i {
    width: 20px;
    color: #1e2939;
    margin-right: 12px;
    font-size: 16px;
  }

  .menu-item > span,
  .menu-item > a {
    flex: 1;
    font-size: 14px;
    font-weight: 500;
    color: #1e2939;
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .menu-item > a:hover {
    color: #465f85;
  }

  /* Language Options */
  .language-options {
    position: absolute;
    right: 20px;
    display: flex;
    gap: 8px;
  }

  .lang-option {
    padding: 6px 12px;
    background: rgba(30, 41, 57, 0.1);
    border: 1px solid rgba(30, 41, 57, 0.2);
    border-radius: 8px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
  }

  .lang-option:hover {
    background: rgba(30, 41, 57, 0.2);
    transform: translateY(-1px);
  }

  .lang-option.active {
    background: linear-gradient(135deg, #1e2939, #465f85);
    color: #fff;
    border-color: #1e2939;
  }

  /* Theme Toggle */
  .theme-toggle {
    position: absolute;
    right: 20px;
    display: flex;
    background: rgba(30, 41, 57, 0.1);
    border-radius: 10px;
    padding: 4px;
    gap: 2px;
  }

  .theme-option {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: transparent;
    border: none;
    border-radius: 8px;
    font-size: 11px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: #1e2939;
    white-space: nowrap;
  }

  .theme-option:hover {
    background: rgba(255, 255, 255, 0.5);
  }

  .theme-option.active {
    background: linear-gradient(135deg, #1e2939, #465f85);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  }

  .theme-option i {
    font-size: 12px;
    width: auto;
    margin: 0;
  }

  /* Dark Theme Styles */
  body.dark-theme {
    background-color: #0f172a;
    color: #e2e8f0;
  }

  body.dark-theme .main-container {
    background-color: #1e293b;
    box-shadow: 5px 9px 20px rgba(0, 0, 0, 0.3);
  }

  body.dark-theme .about-me-container {
    color: #e2e8f0;
  }

  body.dark-theme .company {
    color: #60a5fa;
  }

  body.dark-theme .btm-more,
  body.dark-theme .btm-more-licenses,
  body.dark-theme .btm-more-courses {
    background-color: #374151;
    color: #e2e8f0;
  }

  body.dark-theme .btm-more:hover,
  body.dark-theme .btm-more-licenses:hover,
  body.dark-theme .btm-more-courses:hover {
    background-color: #4b5563;
  }

  body.dark-theme .hamburger-dropdown {
    background: rgba(30, 41, 57, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  body.dark-theme .menu-item {
    border-bottom-color: rgba(255, 255, 255, 0.1);
  }

  body.dark-theme .menu-item:hover {
    background: rgba(255, 255, 255, 0.05);
  }

  body.dark-theme .menu-item i,
  body.dark-theme .menu-item > span,
  body.dark-theme .menu-item > a {
    color: #e2e8f0;
  }

  body.dark-theme .menu-item > a:hover {
    color: #60a5fa;
  }

  body.dark-theme .lang-option,
  body.dark-theme .theme-option {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: #e2e8f0;
  }

  body.dark-theme .lang-option:hover,
  body.dark-theme .theme-option:hover {
    background: rgba(255, 255, 255, 0.2);
  }

  body.dark-theme .theme-toggle {
    background: rgba(255, 255, 255, 0.1);
  }

  body.dark-theme .language-options {
    background: rgba(255, 255, 255, 0.1);
  }

  /* Contact Form Styles */
  .contact-form-item {
    position: relative;
  }

  .contact-form-toggle {
    position: absolute;
    right: 20px;
    background: linear-gradient(135deg, #1e2939, #465f85);
    border: none;
    border-radius: 8px;
    color: #fff;
    padding: 8px 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 12px;
  }

  .contact-form-toggle:hover {
    background: linear-gradient(135deg, #2a3545, #5a7199);
    transform: translateY(-1px);
  }

  .contact-form-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

  .contact-form-modal.active {
    opacity: 1;
    visibility: visible;
  }

  .contact-form-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 30px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transform: scale(0.9) translateY(20px);
    transition: all 0.3s ease;
  }

  .contact-form-modal.active .contact-form-content {
    transform: scale(1) translateY(0);
  }

  .contact-form-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid rgba(30, 41, 57, 0.1);
  }

  .contact-form-header h3 {
    color: #1e2939;
    font-size: 20px;
    font-weight: 600;
    margin: 0;
  }

  .contact-form-close {
    background: none;
    border: none;
    font-size: 18px;
    color: #666;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: all 0.3s ease;
  }

  .contact-form-close:hover {
    background: rgba(30, 41, 57, 0.1);
    color: #1e2939;
  }

  .form-group {
    margin-bottom: 20px;
  }

  .form-group label {
    display: block;
    margin-bottom: 8px;
    color: #1e2939;
    font-weight: 500;
    font-size: 14px;
  }

  .form-group input,
  .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid rgba(30, 41, 57, 0.2);
    border-radius: 12px;
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    background: rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
    box-sizing: border-box;
  }

  .form-group input:focus,
  .form-group textarea:focus {
    outline: none;
    border-color: #465f85;
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 0 0 3px rgba(70, 95, 133, 0.1);
  }

  .form-group textarea {
    resize: vertical;
    min-height: 100px;
  }

  .form-actions {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 25px;
  }

  .btn-submit {
    background: linear-gradient(135deg, #1e2939, #465f85);
    color: #fff;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
  }

  .btn-submit:hover {
    background: linear-gradient(135deg, #2a3545, #5a7199);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
  }

  .btn-submit:active {
    transform: translateY(0);
  }

  .btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
  }

  .form-status {
    font-size: 13px;
    font-weight: 500;
    padding: 8px 0;
    border-radius: 6px;
    transition: all 0.3s ease;
  }

  .form-status.success {
    color: #22c55e;
  }

  .form-status.error {
    color: #ef4444;
  }

  .form-status.sending {
    color: #3b82f6;
  }

  /* Dark theme styles for contact form */
  body.dark-theme .contact-form-content {
    background: rgba(30, 41, 57, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  body.dark-theme .contact-form-header {
    border-bottom-color: rgba(255, 255, 255, 0.1);
  }

  body.dark-theme .contact-form-header h3 {
    color: #e2e8f0;
  }

  body.dark-theme .contact-form-close {
    color: #94a3b8;
  }

  body.dark-theme .contact-form-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #e2e8f0;
  }

  body.dark-theme .form-group label {
    color: #e2e8f0;
  }

  body.dark-theme .form-group input,
  body.dark-theme .form-group textarea {
    background: rgba(15, 23, 42, 0.8);
    border-color: rgba(255, 255, 255, 0.2);
    color: #e2e8f0;
  }

  body.dark-theme .form-group input:focus,
  body.dark-theme .form-group textarea:focus {
    background: rgba(15, 23, 42, 1);
    border-color: #60a5fa;
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.1);
  }

  body.dark-theme .contact-form-toggle {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: #e2e8f0;
  }

  body.dark-theme .contact-form-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
  }

  /* Mobile responsiveness for contact form */
  @media (max-width: 768px) {
    .contact-form-content {
      width: 95%;
      padding: 20px;
      margin: 20px;
    }
    
    .contact-form-header h3 {
      font-size: 18px;
    }
    
    .form-actions {
      flex-direction: column;
      align-items: stretch;
      gap: 10px;
    }
    
    .btn-submit {
      width: 100%;
      padding: 14px;
    }
  }

  /* Mobile Responsiveness */
  @media (max-width: 768px) {
    .hamburger-dropdown {
      width: calc(100vw - 40px);
      right: -10px;
    }
    
    .lang-option,
    .theme-option {
      font-size: 11px;
      padding: 4px 8px;
    }
    
    .theme-option span {
      display: none;
    }
  }

  /* Sidebar */
  .sidebar {
    position: relative;
    background: #1e2939 url('https://i.pinimg.com/564x/93/8d/7a/938d7a97c40421d3250b00d2c7185572.jpg') no-repeat center/cover;
    max-width: 370px;
    width: 100%;
    padding: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .my-photo {
    max-width: 290px;
    margin-bottom: 40px;
  }
  
  /* Contacts */
  .contacts-container {
    width: 100%;
    color: #fff;
    font-size: 14px;
    font-weight: 400;
    line-height: 30px;
  }
  
  /* Links inside the sidebar and overall */
  .link,
  .link_cv {
    text-decoration: none;
    color: #fff;
    transition: color 0.3s ease-in;
  }
  
  .link:hover,
  .link_cv:hover {
    color: #465f85;
  }
  
  /* Tech Skills, Soft Skills containers */
  .tech-skills-container,
  .soft-skills-container {
    width: 100%;
    margin-top: 40px;
    color: #fff;
    font-size: 12px;
    font-weight: 400;
    line-height: 30px;
  }

  /* Language container */
  .language {
    width: 100%;
    margin-top: 40px;
    color: #fff;
    font-size: 12px;
    font-weight: 400;
    line-height: 24px;
    text-align: left;
  }

  .language h3 {
    margin-bottom: 15px;
    font-size: 14px;
    font-weight: 700;
    color: #fff;
  }

  .language span {
    display: block;
    margin-bottom: 8px;
    font-size: 12px;
    color: #ebf4ff;
  }

  /* Social container - full width */
  .social-container {
    width: 100%;
    color: #fff;
    font-size: 12px;
    font-weight: 400;
    line-height: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .skills {
    color: #ebf4ff;
  }
  
  .list {
    color: #003077;
  }
  
  /* Progress bars for languages */
  .bar {
    position: relative;
    height: 10px;
    width: 100%;
    border: 2px solid #1e2939;
    background-color: #465f85;
    border-radius: 20px;
    margin-bottom: 10px;
  }
  .bar span {
    position: absolute;
    height: 100%;
    background-color: #fff;
    border-radius: 20px;
    width: 0;
    animation: fill-skill 1s ease-in-out forwards;
  }
  .bar.de span {
    --fill-width: 20%;
  }
  .bar.fr span {
    --fill-width: 20%;
  }
  .bar.en span {
    --fill-width: 30%;
  }
  .bar.uk span {
    --fill-width: 100%;
  }
  .bar.ru span {
    --fill-width: 100%;
  }
  
  @keyframes fill-skill {
    to {
      width: var(--fill-width);
    }
  }
  
  /* Social links */
  .social {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    padding: 0;
    margin: 0;
    justify-content: center;
  }
  .social__link {
    width: 40px;
    height: 40px;
    text-decoration: none;
    border-radius: 50%;
    border: 3px solid #ffffff;
    display: flex;
    color: #ffffff;
    transition: all 0.3s;
  }
  .social__link a {
    display: flex;
    width: 100%;
    height: 100%;
    align-items: center;
    justify-content: center;
  }
  .social__link:hover {
    transform: scale(1.05);
  }
  
  .telegram:hover {
    border-color: #0088cc;
    box-shadow: 0px 0px 10px #0088cc;
    color: #0088cc;
  }
  .viber:hover {
    border-color: #8f5db7;
    box-shadow: 0px 0px 10px #8f5db7;
    color: #8f5db7;
  }
  .linkedin:hover {
    border-color: #0077b5;
    box-shadow: 0px 0px 10px #0077b5;
    color: #0077b5;
  }
  .github:hover {
    border-color: #F4CBB2;
    box-shadow: 0px 0px 10px #F4CBB2;
    color: #F4CBB2;
  }
  .codepen:hover {
    border-color: #3a3875;
    box-shadow: 0px 0px 10px #3a3875;
    color: #3a3875;
  }
  
  .icons {
    font-size: 20px;
  }

  /* CV link at bottom of sidebar */
  .cv {
    margin-top: auto;
    padding-top: 40px;
  }
  
  /* Main content */
  .about-me-container {
    padding: 8% 5%;
    flex: 1;
  }
  .profession {
    font-size: 14px;
    font-weight: 400;
    margin-bottom: 25px;
  }
  .name {
    font-size: 45px;
    font-weight: 400;
    margin-bottom: 25px;
  }
  .info {
    font-size: 14px;
    font-weight: 400;
    line-height: 24px;
    margin-bottom: 20px;
  }
  
  /* Headings */
  .about-me-title,
  .adaut-mi-taitl {
    font-size: 22px;
    font-weight: 500;
    margin-top: 55px;
    margin-bottom: 35px;
  }
  .data {
    color: #525a64;
  }
  .company {
    text-decoration: none;
    color: #60a5fa;
  }
  .work-experience {
    font-size: 12px;
    font-weight: 400;
    line-height: 24px;
  }
  
  /* Hiding blocks with .card--hidden */
  .card--hidden {
    display: none !important;
  }
  
  /* Hidden blocks for Licenses & Courses */
  .card--hidden-licenses {
    display: none !important;
  }
  .card--hidden-courses {
    display: none !important;
  }
  
  /* "More" buttons for hidden content */
  .btm-more,
  .btm-more-licenses,
  .btm-more-courses {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 30px;
    background-color: #f5f7fa;
    border-radius: 4px;
    border: none;
    font-size: 14px;
    line-height: 21px;
    color: #465f85;
    cursor: pointer;
    transition: background-color 0.2s ease-in;
    margin-top: 15px;
  }
  .btm-more:hover,
  .btm-more-licenses:hover,
  .btm-more-courses:hover {
    background-color: #dadada;
  }
  .rotate-icon {
    transform: rotate(180deg);
    transition: transform 0.2s ease-in-out;
  }
  .fa-chevron-down {
    margin-right: 10px;
  }
  
  /* Education / Licenses / Courses containers */
  .education {
    font-size: 12px;
    font-weight: 500;
    line-height: 24px;
    margin-bottom: 20px;
  }
  .profession-title {
    font-size: 16px;
    font-weight: 400;
    line-height: 24px;
    margin-top: 20px;
    margin-bottom: 5px;
  }
  .university {
    text-decoration: none;
    color: #60a5fa;
    font-size: 14px;
    font-weight: 400;
    line-height: 24px;
    margin-top: 20px;
    margin-bottom: 5px;
  }
  
  /* "Readmore" sections for partial text expansions */
  .readmore {
    max-height: 80px;
    position: relative;
    overflow-y: hidden;
    transition: max-height 0.5s ease;
  }
  .readmore.open {
    max-height: 999px;
  }
  .readmore-link {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 100%;
    text-align: right;
    margin: 0;
    padding: 10px 15px;
    background: none;
    pointer-events: none;
  }
  .readmore-link a {
    pointer-events: auto;
    color: #555555;
    text-decoration: none;
    font-size: 0.6em;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.25s ease;
  }
  .readmore-link a:hover {
    opacity: 1;
  }
  
  /* Media queries */
  @media (max-width: 768px) {
    .main-container {
      flex-direction: column;
      max-width: 100%;
    }
    .sidebar {
      max-width: 100%;
      padding: 20px;
      box-sizing: border-box;
    }
    .my-photo {
      max-width: 200px;
    }
    .about-me-container {
      padding: 20px;
    }
    .name {
      font-size: 32px;
    }
  }