/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'MyCustomFont', sans-serif;
  }
  
  html {
    scroll-behavior: smooth;
    overflow-y: auto;
  }
  
  body {
    font-family: 'MyCustomFont';
    line-height: 1.6;
    color: #333;
    background: #f9f9f9;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }
  
  @font-face {
    font-family: 'MyCustomFont';
    src: url('../Vazir-Bold.ttf') format('truetype');
  }
  
  /* ===== CONTAINER ===== */
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  /* ===== HEADER & NAVIGATION ===== */
  .site-header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
  }
  
  .nav-shell {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: #333;
  }
  
  .brand-mark {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    border-radius: 8px;
  }
  
  .brand-text {
    display: flex;
    flex-direction: column;
  }
  
  .brand-text strong {
    font-size: 18px;
    color: #333;
  }
  
  .brand-text small {
    font-size: 12px;
    color: #666;
  }
  
  /* Menu Toggle (Hamburger) */
  .menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
  }
  
  .menu-toggle span {
    width: 28px;
    height: 3px;
    background: #333;
    border-radius: 2px;
    transition: all 0.3s ease;
  }
  
  .menu-toggle[aria-expanded="true"] span:first-child {
    transform: rotate(45deg) translate(7px, 7px);
  }
  
  .menu-toggle[aria-expanded="true"] span:last-child {
    transform: rotate(-45deg) translate(7px, -7px);
  }
  
  /* Desktop Navigation */
  .site-nav {
    display: flex;
    align-items: center;
    gap: 30px;
  }
  
  .site-nav > a,
  .site-nav .dropdown > a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 15px;
    padding: 8px 0;
    position: relative;
    transition: color 0.3s ease;
    cursor: pointer;
  }
  
  .site-nav > a::after,
  .site-nav .dropdown > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
  }
  
  .site-nav > a:hover,
  .site-nav .dropdown > a:hover {
    color: #667eea;
  }
  
  .site-nav > a:hover::after,
  .site-nav .dropdown > a:hover::after {
    width: 100%;
  }
  
  /* Dropdown Menu */
  .dropdown {
    position: relative;
  }
  
  .dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: #fff;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    border-radius: 8px;
    min-width: 250px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100;
    margin-top: 10px;
  }
  
  .dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
  }
  
  .dropdown-menu a:hover {
    background: #f5f5f5;
    color: #667eea;
    padding-right: 25px;
  }
  
  /* Nested Dropdown */
  .dropdown-nested {
    position: relative;
  }
  
  .dropdown-nested-toggle::after {
    content: '◀';
    margin-right: 8px;
    font-size: 10px;
    transition: transform 0.3s ease;
  }
  
  .dropdown-nested-menu {
    position: absolute;
    top: 0;
    right: 100%;
    background: #f9f9f9;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    border-radius: 8px;
    min-width: 280px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateX(10px);
    transition: all 0.3s ease;
    margin-left: -10px;
  }
  
  .dropdown-nested:hover .dropdown-nested-menu {
      opacity: 1;
      visibility: visible;
      /* transform: translateX(0); */
      margin-left: 0px;
      transform: translateX(530px);
  }
  
  
  .dropdown-nested:hover .dropdown-nested-toggle::after {
    transform: rotate(180deg);
  }
  
  .dropdown-nested-menu a {
    padding: 10px 20px;
    font-size: 13px;
  }
  
  .dropdown-nested-menu a:hover {
    background: #fff;
    color: #667eea;
  }
  
  /* ===== FOOTER ===== */
  .site-footer {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 40px 0 20px;
    margin-top: auto;
  }
  
  .footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    gap: 30px;
  }
  
  .footer-brand-block {
    display: flex;
    align-items: center;
    gap: 15px;
  }
  
  .footer-brand-mark {
    width: 60px;
    height: 60px;
    background: rgba(255,255,255,0.2);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: bold;
    border-radius: 10px;
    backdrop-filter: blur(10px);
  }
  
  .footer-brand-block h3 {
    font-size: 20px;
    margin-bottom: 5px;
  }
  
  .footer-brand-block p {
    font-size: 14px;
    opacity: 0.9;
  }
  
  .footer-links {
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
  }
  
  .footer-links a {
    color: #fff;
    text-decoration: none;
    font-size: 15px;
    transition: opacity 0.3s ease;
  }
  
  .footer-links a:hover {
    opacity: 0.7;
    text-decoration: underline;
  }
  
  .footer-credit {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.2);
    font-size: 14px;
    flex-wrap: wrap;
    gap: 15px;
  }
  
  .footer-credit a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
  }
  
  .footer-credit a:hover {
    opacity: 0.7;
  }
  
  /* ===== MOBILE RESPONSIVE ===== */
  @media (max-width: 780px) {
    .menu-toggle {
      display: flex;
    }
  
    .dropdown-nested:hover .dropdown-nested-menu {
      transform: translateY(0) !important;
    }
  
    .site-nav {
      position: fixed;
      top: 0;
      left: -100%;
      width: 320px;
      max-width: 85%;
      height: 100vh;
      background: #fff;
      flex-direction: column;
      align-items: flex-start;
      gap: 0;
      padding: 80px 0 20px;
      overflow-y: auto;
      box-shadow: 2px 0 20px rgba(0,0,0,0.3);
      transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      z-index: 999;
    }
  
    .site-nav.is-open {
      left: 0;
    }
  
    .site-nav > a,
    .site-nav .dropdown > a {
      width: 100%;
      padding: 15px 25px;
      border-bottom: 1px solid #f0f0f0;
      font-size: 16px;
      opacity: 0;
      transform: translateX(-20px);
      animation: slideIn 0.4s ease forwards;
    }
  
    .site-nav.is-open > a:nth-child(1),
    .site-nav.is-open > .dropdown:nth-child(1) > a {
      animation-delay: 0.1s;
    }
  
    .site-nav.is-open > a:nth-child(2),
    .site-nav.is-open > .dropdown:nth-child(2) > a {
      animation-delay: 0.15s;
    }
  
    .site-nav.is-open > a:nth-child(3),
    .site-nav.is-open > .dropdown:nth-child(3) > a {
      animation-delay: 0.2s;
    }
  
    .site-nav.is-open > a:nth-child(4),
    .site-nav.is-open > .dropdown:nth-child(4) > a {
      animation-delay: 0.25s;
    }
  
    .site-nav.is-open > a:nth-child(5),
    .site-nav.is-open > .dropdown:nth-child(5) > a {
      animation-delay: 0.3s;
    }
  
    @keyframes slideIn {
      to {
        opacity: 1;
        transform: translateX(0);
      }
    }
  
    .site-nav > a::after,
    .site-nav .dropdown > a::after {
      display: none;
    }
  
    /* Mobile Dropdown */
    .dropdown {
      width: 100%;
    }
  
    .dropdown-toggle::after {
      content: '▼';
      float: left;
      margin-left: 10px;
      font-size: 10px;
      transition: transform 0.3s ease;
    }
  
    .dropdown.is-open .dropdown-toggle::after {
      transform: rotate(180deg);
    }
  
    .dropdown-menu {
      position: static;
      box-shadow: none;
      border-radius: 0;
      background: #f9f9f9;
      margin: 0;
      padding: 0;
      max-height: 0;
      overflow: hidden;
      opacity: 1;
      visibility: visible;
      transform: none;
      transition: max-height 0.4s ease;
    }
  
    .dropdown.is-open .dropdown-menu {
      max-height: 800px;
    }
  
    .dropdown-menu a {
      padding: 12px 25px 12px 45px;
      border-bottom: 1px solid #e0e0e0;
      font-size: 14px;
    }
  
    /* Mobile Nested Dropdown */
    .dropdown-nested-toggle::after {
      content: '▼';
      margin-right: 0;
      margin-left: 10px;
      float: left;
    }
  
    .dropdown-nested.is-open .dropdown-nested-toggle::after {
      transform: rotate(180deg);
    }
  
    .dropdown-nested-menu {
      position: static;
      box-shadow: none;
      background: #ececec;
      margin: 0;
      padding: 0;
      max-height: 0;
      overflow: hidden;
      transform: none;
      transition: max-height 0.4s ease;
    }
  
    .dropdown-nested.is-open .dropdown-nested-menu {
      max-height: 600px;
    }
  
    .dropdown-nested-menu a {
      padding: 10px 25px 10px 65px;
      font-size: 13px;
    }
  
    /* ========== Mobile Styles ========== */
  @media (max-width: 780px) {
    .dropdown-toggle::after,
    .dropdown-nested-toggle::after {
      float: left;
    }
    
    .dropdown-nested:hover .dropdown-nested-menu {
      transform: translateY(0) !important;
    }
    .dropdown-menu,
    .dropdown-nested-menu {
      position: static;
      opacity: 1;
      visibility: visible;
      transform: none;
      box-shadow: none;
      background: rgba(255,255,255,0.05);
      margin: 0;
      padding: 0;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
    }
    
    .dropdown.is-open > .dropdown-menu {
      max-height: 800px;
    }
    
    .dropdown-nested.is-open > .dropdown-nested-menu {
      max-height: 700px;
    }
    
    .dropdown-menu a,
    .dropdown-nested-menu a {
      padding: 12px 20px;
      padding-right: 40px;
      border-right: 3px solid transparent;
    }
    
    .dropdown-nested-menu a {
      padding-right: 60px;
      font-size: 13px;
      background: rgba(0,0,0,0.1);
    }
    
    .dropdown-menu a:hover,
    .dropdown-nested-menu a:hover {
      background: rgba(255,255,255,0.15);
      border-right-color: #667eea;
    }
    
    /* مهم: nested dropdown باید داخل dropdown-menu باشه */
    .dropdown-nested {
      display: block;
      width: 100%;
    }
    
    .dropdown-nested-toggle {
      display: block;
      width: 100%;
    }
  }
  
  
    /* Mobile Overlay */
    body::before {
      content: '';
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0,0,0,0.5);
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
      z-index: 998;
    }
  
    body.menu-open::before {
      opacity: 1;
      visibility: visible;
    }
  
    /* Footer Mobile */
    .footer-container {
      gap: 25px;
    }
  
    .footer-brand-block {
      flex-direction: column;
      align-items: flex-start;
      text-align: right;
    }
  
    .footer-links {
      flex-direction: column;
      gap: 15px;
    }
  
    .footer-credit {
      flex-direction: column;
      align-items: flex-start;
      gap: 10px;
    }
  }
  
  @media (max-width: 480px) {
    .brand-text strong {
      font-size: 16px;
    }
  
    .brand-text small {
      font-size: 11px;
    }
  
    .site-nav {
      width: 280px;
    }
    .dropdown-nested:hover .dropdown-nested-menu {
      transform: translateY(0) !important;
    }
  }
  
  /* ========== Tablet Landscape (780px - 1024px) ========== */
  @media (max-width: 1024px) {
    .container {
      max-width: 90%;
    }
    
    .site-nav a {
      padding: 8px 15px;
      font-size: 14px;
    }
    
    .hero h1 {
      font-size: 2.5rem;
    }
    
    .hero p {
      font-size: 1.1rem;
    }
  }
  
  /* ========== Tablet Portrait (600px - 780px) ========== */
  @media (max-width: 780px) {
    /* کدهای موجود شما... */
    
    .hero h1 {
      font-size: 2rem;
    }
    
    .hero p {
      font-size: 1rem;
    }
    
    .section {
      padding: 60px 0;
    }
  }
  
  /* ========== Mobile Large (480px - 600px) ========== */
  @media (max-width: 600px) {
    .hero {
      min-height: 500px;
    }
    
    .hero h1 {
      font-size: 1.8rem;
    }
    
    .hero p {
      font-size: 0.95rem;
    }
    
    .btn {
      padding: 10px 25px;
      font-size: 14px;
    }
    
    .section {
      padding: 50px 0;
    }
    
    .section h2 {
      font-size: 1.8rem;
    }
  }
  
  /* ========== Mobile Small (320px - 480px) ========== */
  @media (max-width: 480px) {
    .container {
      max-width: 95%;
      padding: 0 15px;
    }
    
    .site-header {
      padding: 12px 0;
    }
    
    .logo {
      font-size: 1.3rem;
    }
    
    .hero {
      min-height: 450px;
    }
    
    .hero h1 {
      font-size: 1.5rem;
      line-height: 1.3;
    }
    
    .hero p {
      font-size: 0.9rem;
      margin: 15px 0 25px;
    }
    
    .btn {
      padding: 10px 20px;
      font-size: 13px;
    }
    
    .section {
      padding: 40px 0;
    }
    
    .section h2 {
      font-size: 1.5rem;
      margin-bottom: 20px;
    }
    
    .section p {
      font-size: 14px;
    }
    
    .dropdown-menu a,
    .dropdown-nested-menu a {
      padding: 10px 15px;
      font-size: 13px;
    }
    
    .dropdown-nested-menu a {
      padding-right: 50px;
      font-size: 12px;
    }
    
    .site-footer {
      padding: 30px 0;
      font-size: 13px;
    }
  }
  
  /* ========== Mobile Extra Small (< 360px) ========== */
  @media (max-width: 360px) {
    .hero h1 {
      font-size: 1.3rem;
    }
    
    .hero p {
      font-size: 0.85rem;
    }
    
    .section h2 {
      font-size: 1.3rem;
    }
    
    .btn {
      padding: 8px 18px;
      font-size: 12px;
    }
  }
  
  /* ========== Large Desktop (> 1400px) ========== */
  @media (min-width: 1400px) {
    .container {
      max-width: 1320px;
    }
    
    .hero h1 {
      font-size: 3.5rem;
    }
    
    .hero p {
      font-size: 1.3rem;
    }
    
    .section h2 {
      font-size: 2.8rem;
    }
  }
  
  
  /* ==================== Hero Section ==================== */
  .hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 120px 20px 80px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
  }
  
  .hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,101.3C1248,85,1344,75,1392,69.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.3;
  }
  
  .hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.2);
  }
  
  .hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    opacity: 0.95;
    position: relative;
    z-index: 1;
  }
  
  /* ==================== Content Section ==================== */
  .content-section {
    padding: 60px 20px;
    background: linear-gradient(to bottom, #f8f9fa 0%, #ffffff 100%);
  }
  
  .info-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    border: 1px solid rgba(102, 126, 234, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  
  .info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(102, 126, 234, 0.15);
  }
  
  .info-card h2 {
    color: #667eea;
    font-size: 2rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 15px;
  }
  
  .info-card h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
  }
  
  .info-card p {
    line-height: 1.8;
    color: #555;
    font-size: 1.1rem;
  }
  
  /* ==================== Tabs ==================== */
  .tabs-container {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    margin-bottom: 40px;
  }
  
  .tabs-nav {
    display: flex;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 10px;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .tab-btn {
    flex: 1;
    min-width: 150px;
    padding: 15px 25px;
    background: rgba(255,255,255,0.2);
    border: 2px solid transparent;
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
  }
  
  .tab-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-2px);
  }
  
  .tab-btn.active {
    background: white;
    color: #667eea;
    border-color: white;
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
  }
  
  .tab-content {
    display: none;
    padding: 40px;
    animation: fadeIn 0.5s ease;
  }
  
  .tab-content.active {
    display: block;
  }
  
  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  .tab-content h3 {
    color: #667eea;
    font-size: 1.8rem;
    margin-bottom: 30px;
    text-align: center;
  }
  
  /* ==================== Definition Grid ==================== */
  .definition-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
  }
  
  .definition-item {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
  }
  
  .definition-item:hover {
    transform: translateY(-5px);
    border-color: #667eea;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.15);
  }
  
  .definition-icon {
    font-size: 3rem;
    margin-bottom: 15px;
  }
  
  .definition-item h4 {
    color: #333;
    font-size: 1.3rem;
    margin-bottom: 10px;
  }
  
  .definition-item p {
    color: #666;
    line-height: 1.6;
    font-size: 0.95rem;
  }
  
  /* ==================== Modern Table ==================== */
  .table-wrapper {
    overflow-x: auto;
    margin: 30px 0;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
  }
  
  .modern-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
  }
  
  .modern-table thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
  }
  
  .modern-table th {
    padding: 20px;
    text-align: center;
    font-weight: 600;
    font-size: 1.1rem;
  }
  
  .modern-table tbody tr {
    border-bottom: 1px solid #e9ecef;
    transition: background 0.3s ease;
  }
  
  .modern-table tbody tr:hover {
    background: #f8f9fa;
  }
  
  .modern-table td {
    padding: 18px 20px;
    text-align: center;
    color: #555;
  }
  
  .modern-table tbody tr:last-child {
    border-bottom: none;
  }
  
  .table-note {
    margin-top: 20px;
    padding: 15px;
    background: #fff3cd;
    border-right: 4px solid #ffc107;
    border-radius: 8px;
    color: #856404;
  }
  
  /* ==================== Steps ==================== */
  .steps-container {
    margin-top: 30px;
  }
  
  .step-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
    padding: 25px;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 15px;
    border-right: 5px solid #667eea;
    transition: all 0.3s ease;
  }
  
  .step-item:hover {
    transform: translateX(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.15);
  }
  
  .step-number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
  }
  
  .step-content h4 {
    color: #333;
    font-size: 1.3rem;
    margin-bottom: 10px;
  }
  
  .step-content p {
    color: #666;
    line-height: 1.6;
  }
  
  /* ==================== Accordion ==================== */
  .accordion {
    margin-top: 30px;
  }
  
  .accordion-item {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
  }
  
  .accordion-item:hover {
    border-color: #667eea;
  }
  
  .accordion-header {
    width: 100%;
    padding: 20px 25px;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    text-align: right;
    transition: all 0.3s ease;
  }
  
  .accordion-header:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
  }
  
  .accordion-icon {
    font-size: 1.5rem;
    font-weight: 700;
    transition: transform 0.3s ease;
  }
  
  .accordion-item.active .accordion-icon {
    transform: rotate(45deg);
  }
  
  .accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 25px;
    background: white;
  }
  
  .accordion-item.active .accordion-body {
    max-height: 500px;
    padding: 20px 25px;
  }
  
  .accordion-body p {
    color: #555;
    line-height: 1.8;
    margin: 0;
  }
  
  /* ==================== Calculator ==================== */
  .calculator-section {
    margin-top: 40px;
  }
  
  .calculator-section h3 {
    color: #667eea;
    font-size: 2rem;
    text-align: center;
    margin-bottom: 30px;
  }
  
  .calculator-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    max-width: 600px;
    margin: 0 auto;
  }
  
  .calc-input-group {
    margin-bottom: 25px;
  }
  
  .calc-input-group label {
    display: block;
    margin-bottom: 10px;
    color: #333;
    font-weight: 600;
    font-size: 1rem;
  }
  
  .calc-input-group input,
  .calc-input-group select {
    width: 100%;
    padding: 15px;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
  }
  
  .calc-input-group input:focus,
  .calc-input-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
  }
  
  .calc-btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
  }
  
  .calc-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
  }
  
  .calc-btn:active {
    transform: translateY(0);
  }
  
  .calc-result {
    margin-top: 25px;
    padding: 25px;
    background: linear-gradient(135deg, #d4fc79 0%, #96e6a1 100%);
    border-radius: 12px;
    text-align: center;
    font-size: 1.3rem;
    font-weight: 700;
    color: #155724;
    display: none;
    animation: slideDown 0.5s ease;
  }
  
  .calc-result.show {
    display: block;
  }
  
  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* ==================== Responsive ==================== */
  @media (max-width: 768px) {
    .hero-section {
      padding: 100px 20px 60px;
    }
  
    .info-card {
      padding: 25px;
    }
  
    .tabs-nav {
      flex-direction: column;
    }
  
    .tab-btn {
      min-width: 100%;
    }
  
    .tab-content {
      padding: 25px;
    }
  
    .definition-grid {
      grid-template-columns: 1fr;
    }
  
    .step-item {
      flex-direction: column;
      text-align: center;
    }
  
    .step-number {
      margin: 0 auto 15px;
    }
  
    .calculator-card {
      padding: 25px;
    }
  }
  
  @media (max-width: 480px) {
    .hero-title {
      font-size: 1.8rem;
    }
  
    .hero-subtitle {
      font-size: 1rem;
    }
  
    .tab-content h3 {
      font-size: 1.5rem;
    }
  
    .modern-table th,
    .modern-table td {
      padding: 12px 8px;
      font-size: 0.9rem;
    }
  }
  
  /* ===== RESET & BASE ===== */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  body {
    font-family: 'MyCustomFont' !important;
    line-height: 1.6;
    color: #333;
    background: #f9f9f9;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
  }
  
  @font-face {
    font-family: 'MyCustomFont';
    src: url('../384.Font.Farsi/384.Font.Farsi/Badr.ttf') format('ttf');
    font-weight: normal;
    font-style: normal;
  }
  
  /* ===== CONTAINER ===== */
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  /* ===== HEADER & NAVIGATION ===== */
  .site-header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
  }
  
  .nav-shell {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: #333;
  }
  
  .brand-mark {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    border-radius: 8px;
  }
  
  .brand-text {
    display: flex;
    flex-direction: column;
  }
  
  .brand-text strong {
    font-size: 18px;
    color: #333;
  }
  
  .brand-text small {
    font-size: 12px;
    color: #666;
  }
  
  /* Menu Toggle (Hamburger) */
  .menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
  }
  
  .menu-toggle span {
    width: 28px;
    height: 3px;
    background: #333;
    border-radius: 2px;
    transition: all 0.3s ease;
  }
  
  .menu-toggle[aria-expanded="true"] span:first-child {
    transform: rotate(45deg) translate(7px, 7px);
  }
  
  .menu-toggle[aria-expanded="true"] span:last-child {
    transform: rotate(-45deg) translate(7px, -7px);
  }
  
  /* Desktop Navigation */
  .site-nav {
    display: flex;
    align-items: center;
    gap: 30px;
  }
  
  .site-nav > a,
  .site-nav .dropdown > a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 15px;
    padding: 8px 0;
    position: relative;
    transition: color 0.3s ease;
    cursor: pointer;
  }
  
  .site-nav > a::after,
  .site-nav .dropdown > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
  }
  
  .site-nav > a:hover,
  .site-nav .dropdown > a:hover {
    color: #667eea;
  }
  
  .site-nav > a:hover::after,
  .site-nav .dropdown > a:hover::after {
    width: 100%;
  }
  
  /* Dropdown Menu */
  .dropdown {
    position: relative;
  }
  
  .dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: #fff;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    border-radius: 8px;
    min-width: 250px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100;
    margin-top: 10px;
  }
  
  .dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .dropdown-menu > a {
    display: block;
    padding: 12px 20px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
  }
  
  .dropdown-menu > a:hover {
    background: #f5f5f5;
    color: #667eea;
    padding-right: 25px;
  }
  
  /* ===== NESTED DROPDOWN - ACCORDION STYLE (Desktop) ===== */
  .dropdown-nested {
    position: relative;
  }
  
  .dropdown-nested-toggle {
    display: block;
    padding: 12px 20px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
    cursor: pointer;
  }
  
  .dropdown-nested-toggle::after {
    content: '▼';
    margin-right: 8px;
    font-size: 10px;
    transition: transform 0.3s ease;
    display: inline-block;
  }
  
  .dropdown-nested:hover .dropdown-nested-toggle {
    background: #f5f5f5;
    color: #667eea;
    padding-right: 25px;
  }
  
  .dropdown-nested-menu {
    background: #f9f9f9;
    border-radius: 8px;
    padding: 0;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease, padding 0.3s ease;
    margin: 0;
  }
  
  .dropdown-nested:hover .dropdown-nested-menu {
    max-height: 500px;
    opacity: 1;
    padding: 10px 0;
    margin-top: 5px;
  }
  
  .dropdown-nested:hover .dropdown-nested-toggle::after {
    transform: rotate(180deg);
  }
  
  .dropdown-nested-menu a {
    display: block;
    padding: 10px 20px 10px 35px;
    font-size: 13px;
    background: transparent;
    color: #333;
    text-decoration: none;
    transition: all 0.3s ease;
  }
  
  .dropdown-nested-menu a:hover {
    background: #fff;
    color: #667eea;
    padding-right: 40px;
  }
  
  /* ===== FOOTER ===== */
  .site-footer {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 40px 0 20px;
    margin-top: auto;
  }
  
  .footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    gap: 30px;
  }
  
  .footer-brand-block {
    display: flex;
    align-items: center;
    gap: 15px;
  }
  
  .footer-brand-mark {
    width: 60px;
    height: 60px;
    background: rgba(255,255,255,0.2);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: bold;
    border-radius: 10px;
    backdrop-filter: blur(10px);
  }
  
  .footer-brand-block h3 {
    font-size: 20px;
    margin-bottom: 5px;
  }
  
  .footer-brand-block p {
    font-size: 14px;
    opacity: 0.9;
  }
  
  .footer-links {
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
  }
  
  .footer-links a {
    color: #fff;
    text-decoration: none;
    font-size: 15px;
    transition: opacity 0.3s ease;
  }
  
  .footer-links a:hover {
    opacity: 0.7;
    text-decoration: underline;
  }
  
  .footer-credit {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.2);
    font-size: 14px;
    flex-wrap: wrap;
    gap: 15px;
  }
  
  .footer-credit a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
  }
  
  .footer-credit a:hover {
    opacity: 0.7;
  }
  
  /* ===== MOBILE RESPONSIVE ===== */
  @media (max-width: 780px) {
    .menu-toggle {
      display: flex;
    }
  
    .site-nav {
      position: fixed;
      top: 0;
      left: -100%;
      width: 320px;
      max-width: 85%;
      height: 100vh;
      background: #fff;
      flex-direction: column;
      align-items: flex-start;
      gap: 0;
      padding: 80px 0 20px;
      overflow-y: auto;
      box-shadow: 2px 0 20px rgba(0,0,0,0.3);
      transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      z-index: 999;
    }
  
    .site-nav.is-open {
      left: 0;
    }
  
    .site-nav > a,
    .site-nav .dropdown > a {
      width: 100%;
      padding: 15px 25px;
      border-bottom: 1px solid #f0f0f0;
      font-size: 16px;
      opacity: 0;
      transform: translateX(-20px);
      animation: slideIn 0.4s ease forwards;
    }
  
    .site-nav.is-open > a:nth-child(1),
    .site-nav.is-open > .dropdown:nth-child(1) > a {
      animation-delay: 0.1s;
    }
  
    .site-nav.is-open > a:nth-child(2),
    .site-nav.is-open > .dropdown:nth-child(2) > a {
      animation-delay: 0.15s;
    }
  
    .site-nav.is-open > a:nth-child(3),
    .site-nav.is-open > .dropdown:nth-child(3) > a {
      animation-delay: 0.2s;
    }
  
    .site-nav.is-open > a:nth-child(4),
    .site-nav.is-open > .dropdown:nth-child(4) > a {
      animation-delay: 0.25s;
    }
  
    .site-nav.is-open > a:nth-child(5),
    .site-nav.is-open > .dropdown:nth-child(5) > a {
      animation-delay: 0.3s;
    }
  
    @keyframes slideIn {
      to {
        opacity: 1;
        transform: translateX(0);
      }
    }
  
    .site-nav > a::after,
    .site-nav .dropdown > a::after {
      display: none;
    }
  
    /* Mobile Dropdown */
    .dropdown {
      width: 100%;
    }
  
    .dropdown-toggle::after {
      content: '▼';
      float: left;
      margin-left: 10px;
      font-size: 10px;
      transition: transform 0.3s ease;
    }
  
    .dropdown.is-open .dropdown-toggle::after {
      transform: rotate(180deg);
    }
  
    .dropdown-menu {
      position: static;
      box-shadow: none;
      border-radius: 0;
      background: #f9f9f9;
      margin: 0;
      padding: 0;
      max-height: 0;
      overflow: hidden;
      opacity: 1;
      visibility: visible;
      transform: none;
      transition: max-height 0.4s ease;
    }
  
    .dropdown.is-open .dropdown-menu {
      max-height: 800px;
    }
  
    .dropdown-menu > a {
      padding: 12px 25px 12px 45px;
      border-bottom: 1px solid #e0e0e0;
      font-size: 14px;
    }
  
    /* Mobile Nested Dropdown */
    .dropdown-nested-toggle::after {
      content: '▼';
      margin-right: 0;
      margin-left: 10px;
      float: left;
    }
  
    .dropdown-nested.is-open .dropdown-nested-toggle::after {
      transform: rotate(180deg);
    }
  
    .dropdown-nested-menu {
      position: static;
      box-shadow: none;
      background: #ececec;
      margin: 0;
      padding: 0;
      max-height: 0;
      overflow: hidden;
      transform: none;
      transition: max-height 0.4s ease;
    }
  
    .dropdown-nested.is-open .dropdown-nested-menu {
      max-height: 600px;
    }
  
    .dropdown-nested-menu a {
      padding: 10px 25px 10px 65px;
      font-size: 13px;
    }
  
    /* Mobile Overlay */
    body::before {
      content: '';
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0,0,0,0.5);
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
      z-index: 998;
    }
  
    body.menu-open::before {
      opacity: 1;
      visibility: visible;
    }
  
    /* Footer Mobile */
    .footer-container {
      gap: 25px;
    }
  
    .footer-brand-block {
      flex-direction: column;
      align-items: flex-start;
      text-align: right;
    }
  
    .footer-links {
      flex-direction: column;
      gap: 15px;
    }
  
    .footer-credit {
      flex-direction: column;
      align-items: flex-start;
      gap: 10px;
    }
  }
  
  @media (max-width: 480px) {
    .brand-text strong {
      font-size: 16px;
    }
  
    .brand-text small {
      font-size: 11px;
    }
  
    .site-nav {
      width: 280px;
    }
  }
  
  /* ========== Content Sections ========== */
  .content-section {
    padding: 60px 20px;
    background: linear-gradient(to bottom, #f8f9fa 0%, #ffffff 100%);
  }
  
  .info-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    border: 1px solid rgba(102, 126, 234, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  
  .info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(102, 126, 234, 0.15);
  }
  
  .info-card h2 {
    color: #667eea;
    font-size: 2rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 15px;
  }
  
  .info-card h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
  }
  
  .info-card h3 {
    color: #764ba2;
    font-size: 1.5rem;
    margin: 25px 0 15px;
  }
  
  .info-card p, .info-card ol, .info-card ul {
    line-height: 1.8;
    color: #555;
    font-size: 1.05rem;
    margin-bottom: 15px;
  }
  
  .info-card ol, .info-card ul {
    padding-right: 25px;
  }
  
  .info-card li {
    margin-bottom: 10px;
  }
  
  .info-card hr {
    border: none;
    border-top: 2px solid #e9ecef;
    margin: 30px 0;
  }
  
  /* Board Members Section */
  .board-members {
    padding: 5rem 2rem;
    background: #f8f9fa;
  }
  
  .board-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
  }
  
  .board-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, #d4a574 0%, #c89860 100%);
    border-radius: 2px;
  }
  
  .members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
    justify-items: center;
  }
  
  .member-card {
    background: #fff;
    border: 2px solid #2c3e50;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    max-width: 350px;
    width: 100%;
  }
  
  .member-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
  }
  
  .member-image {
    width: 100%;
    height: 350px;
    overflow: hidden;
    background: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .member-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
  }
  
  .member-info {
    padding: 1.5rem;
    text-align: center;
    background: #fff;
  }
  
  .member-position {
    font-size: 1.1rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 0.8rem;
  }
  
  .member-description {
    font-size: 0.9rem;
    color: #555;
    line-height: 1.6;
  }
  
  /* Responsive */
  @media (max-width: 768px) {
    .board-members {
      padding: 3rem 1rem;
    }
    
    .board-title {
      font-size: 1.5rem;
    }
    
    .members-grid {
      grid-template-columns: 1fr;
      gap: 1.5rem;
    }
    
    .member-card {
      max-width: 100%;
    }
    
    .member-image {
      height: 300px;
    }
    
    .member-position {
      font-size: 1rem;
    }
    
    .member-description {
      font-size: 0.85rem;
    }
  }
  
  @media (max-width: 480px) {
    .member-image {
      height: 250px;
    }
  }
  
  .projects-section {
    padding: 60px 20px;
    background: linear-gradient(to bottom, #f8f9fa 0%, #ffffff 100%);
  }
  
  .projects-title {
    text-align: center;
    font-size: 2rem;
    color: #333;
    margin-bottom: 40px;
    position: relative;
  }
  
  .projects-title::after {
    content: '';
    display: block;
    width: 90px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    margin: 12px auto 0;
    border-radius: 2px;
  }
  
  .projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
  }
  
  .project-item {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    text-align: center;
    padding-bottom: 15px;
  }
  
  .project-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 14px 35px rgba(0,0,0,0.12);
  }
  
  .project-item h3 {
    font-size: 1.1rem;
    color: #444;
    padding: 18px 10px 12px;
  }
  
  .project-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
  }
  
  /* ریسپانسیو */
  @media (max-width: 768px) {
    .projects-title {
      font-size: 1.6rem;
    }
  
    .project-item img {
      height: 200px;
    }
  }
  
  @media (max-width: 480px) {
    .projects-section {
      padding: 40px 15px;
    }
  
    .project-item h3 {
      font-size: 1rem;
    }
  
    .project-item img {
      height: 180px;
    }
  }
  
  
  /* ================= Projects Column Section ================= */
  
  .projects-column-section {
    padding: 80px 20px;
    background:
      radial-gradient(circle at top right, rgba(102,126,234,0.12), transparent 35%),
      linear-gradient(to bottom, #f8f9fa 0%, #ffffff 100%);
  }
  
  .projects-heading {
    text-align: center;
    margin-bottom: 50px;
  }
  
  .projects-heading span {
    display: inline-block;
    color: #667eea;
    background: rgba(102,126,234,0.1);
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 14px;
    margin-bottom: 15px;
  }
  
  .projects-heading h1 {
    font-size: 2.2rem;
    color: #222;
    margin-bottom: 12px;
  }
  
  .projects-heading p {
    color: #666;
    font-size: 1rem;
  }
  
  .projects-column-list {
    display: flex;
    flex-direction: column;
    gap: 35px;
  }
  
  .project-column-card {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 18px 45px rgba(0,0,0,0.10);
    transition: all 0.35s ease;
  }
  
  .project-column-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 60px rgba(102,126,234,0.22);
  }
  
  .project-image {
    position: relative;
    width: 100%;
    height: 430px;
    overflow: hidden;
  }
  
  .project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s ease;
    display: block;
  }
  
  .project-column-card:hover .project-image img {
    transform: scale(1.08);
  }
  
  .project-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
      linear-gradient(to left, rgba(0,0,0,0.72), rgba(0,0,0,0.25), rgba(0,0,0,0.08)),
      linear-gradient(to top, rgba(0,0,0,0.45), transparent);
    z-index: 1;
  }
  
  .project-overlay {
    position: absolute;
    inset: 0;
    z-index: 2;
    padding: 35px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 25px;
    color: #fff;
  }
  
  .project-number {
    position: absolute;
    top: 25px;
    left: 30px;
    font-size: 4.5rem;
    font-weight: 900;
    color: rgba(255,255,255,0.18);
    line-height: 1;
  }
  
  .project-info {
    max-width: 650px;
    padding: 22px 25px;
    border-radius: 20px;
    background: rgba(255,255,255,0.13);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.25);
  }
  
  .project-info h2 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: #fff;
  }
  
  .project-info p {
    font-size: 1rem;
    color: rgba(255,255,255,0.9);
  }
  
  .project-link {
    flex-shrink: 0;
    text-decoration: none;
    color: #fff;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 13px 24px;
    border-radius: 50px;
    font-size: 14px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.25);
    transition: all 0.3s ease;
  }
  
  .project-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(102,126,234,0.45);
  }
  
  /* Responsive */
  @media (max-width: 768px) {
    .projects-column-section {
      padding: 55px 15px;
    }
  
    .projects-heading h1 {
      font-size: 1.6rem;
      line-height: 1.7;
    }
  
    .project-image {
      height: 360px;
    }
  
    .project-overlay {
      flex-direction: column;
      align-items: flex-start;
      justify-content: flex-end;
      padding: 25px;
    }
  
    .project-info {
      width: 100%;
    }
  
    .project-info h2 {
      font-size: 1.35rem;
    }
  
    .project-link {
      width: 100%;
      text-align: center;
    }
  
    .project-number {
      font-size: 3.5rem;
      top: 20px;
      left: 20px;
    }
  }
  
  @media (max-width: 480px) {
    .project-image {
      height: 300px;
    }
  
    .project-overlay {
      padding: 18px;
    }
  
    .project-info {
      padding: 18px;
    }
  
    .project-info h2 {
      font-size: 1.15rem;
    }
  
    .project-info p {
      font-size: 0.9rem;
    }
  }
  
  
  /* ================= Project Clickable Cards ================= */
  .project-card-trigger {
    cursor: pointer;
  }
  
  /* ================= Gallery Modal ================= */
  .gallery-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 30px;
  }
  
  .gallery-modal.active {
    display: flex;
  }
  
  .gallery-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(8, 12, 20, 0.82);
    backdrop-filter: blur(8px);
  }
  
  .gallery-content {
    position: relative;
    z-index: 2;
    width: min(1000px, 100%);
    max-height: 90vh;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 24px;
    padding: 22px;
    backdrop-filter: blur(16px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.35);
  }
  
  .gallery-slider {
    width: 100%;
    height: 70vh;
    max-height: 620px;
    border-radius: 18px;
    overflow: hidden;
    background: #111;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .gallery-slider img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: #111;
  }
  
  .gallery-close {
    position: absolute;
    top: 10px;
    left: 12px;
    width: 46px;
    height: 46px;
    border: none;
    border-radius: 50%;
    background: rgba(255,255,255,0.14);
    color: #fff;
    font-size: 30px;
    cursor: pointer;
    z-index: 5;
    transition: 0.3s ease;
  }
  
  .gallery-close:hover {
    background: rgba(255,255,255,0.24);
    transform: rotate(90deg);
  }
  
  .gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 54px;
    height: 54px;
    border: none;
    border-radius: 50%;
    background: rgba(255,255,255,0.14);
    color: #fff;
    font-size: 26px;
    cursor: pointer;
    z-index: 4;
    transition: all 0.3s ease;
  }
  
  .gallery-nav:hover {
    background: rgba(255,255,255,0.24);
    transform: translateY(-50%) scale(1.08);
  }
  
  .gallery-prev {
    right: 20px;
  }
  
  .gallery-next {
    left: 20px;
  }
  
  .gallery-thumbs {
    display: flex;
    gap: 12px;
    margin-top: 18px;
    overflow-x: auto;
    padding-bottom: 6px;
  }
  
  .gallery-thumbs::-webkit-scrollbar {
    height: 8px;
  }
  
  .gallery-thumbs::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.25);
    border-radius: 20px;
  }
  
  .gallery-thumb {
    width: 95px;
    height: 70px;
    flex: 0 0 auto;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    opacity: 0.7;
    transition: all 0.3s ease;
  }
  
  .gallery-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }
  
  .gallery-thumb.active {
    border-color: #667eea;
    opacity: 1;
    transform: translateY(-2px);
  }
  
  @media (max-width: 768px) {
    .gallery-modal {
      padding: 15px;
    }
  
    .gallery-content {
      padding: 14px;
      border-radius: 18px;
    }
  
    .gallery-slider {
      height: 52vh;
    }
  
    .gallery-nav {
      width: 44px;
      height: 44px;
      font-size: 22px;
    }
  
    .gallery-prev {
      right: 10px;
    }
  
    .gallery-next {
      left: 10px;
    }
  
    .gallery-thumb {
      width: 78px;
      height: 58px;
    }
  }
  
  .survey-section{
    padding:80px 20px;
    background:#f8fafc;
}

.section-header{
    max-width:900px;
    margin:0 auto 50px;
    text-align:center;
}

.section-subtitle{
    display:inline-block;
    color:#c59d5f;
    font-weight:600;
    margin-bottom:10px;
}

.section-header h2{
    font-size:2.5rem;
    color:#1f2937;
    margin-bottom:20px;
}

.section-header p{
    line-height:2;
    color:#6b7280;
    font-size:1.05rem;
}

.survey-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
    gap:25px;
    max-width:1200px;
    margin:auto;
}

.survey-card{
    background:#fff;
    border-radius:20px;
    padding:30px;
    box-shadow:0 10px 30px rgba(0,0,0,.08);
    transition:.3s ease;
    border-top:4px solid #c59d5f;
}

.survey-card:hover{
    transform:translateY(-8px);
    box-shadow:0 15px 35px rgba(0,0,0,.12);
}

.survey-card h3{
    color:#111827;
    margin-bottom:20px;
    font-size:1.3rem;
}

.survey-card ul,
.survey-card ol{
    padding-right:20px;
}

.survey-card li{
    margin-bottom:12px;
    color:#4b5563;
    line-height:1.9;
}

@media(max-width:768px){

    .survey-section{
        padding:60px 15px;
    }

    .section-header h2{
        font-size:2rem;
    }

    .survey-card{
        padding:25px;
    }

}