/* ==================== RESET & BASE ==================== */
   * { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body { 
      font-family: 'Cairo', sans-serif; 
      overflow-x: hidden; 
      background: #0a0f2b;
      color: #ccd6f6;
      position: relative;
      min-height: 100vh;
    }

    html, body {
      max-width: 100vw;
      overflow-x: hidden;
    }

    /* Night Sky Background */
    .night-sky {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: -3;
      background: linear-gradient(to bottom, #000428, #004e92);
      overflow: hidden;
    }
    
    .stars {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: -2;
    }

    .star {
      position: absolute;
      background-color: #fff;
      border-radius: 50%;
      animation: twinkle 5s infinite ease-in-out;
    }

    @keyframes twinkle {
      0%, 100% { opacity: 0.3; }
      50% { opacity: 1; transform: scale(1.2); }
    }

    .shooting-star {
      position: absolute;
      height: 2px;
      background: linear-gradient(to right, transparent 0%, #fff 50%, transparent 100%);
      animation: shooting 20s infinite;
      transform: rotate(45deg);
      opacity: 0;
    }
    
    @keyframes shooting {
      0% { opacity: 0; top: var(--start-top); left: var(--start-left); }
      5% { opacity: 1; }
      100% { top: var(--end-top); left: var(--end-left); opacity: 0; }
    }

    /* ==================== VARIABLES ==================== */
    :root {
      --c-primary: #0a192f;
      --c-secondary: #112240;
      --c-accent: #64ffda;
      --c-accent-light: #8affdb;
      --c-accent-dark: #52d1a8;
      --c-light: #ccd6f6;
      --c-lighter: #e6f1ff;
      --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
      --shadow: 0 10px 30px -15px rgba(2,12,27,0.7);
    }

    /* ==================== GLOBAL STYLES ==================== */
    .container { 
      width: 90%; 
      max-width: 1200px; 
      margin: 0 auto; 
      padding: 0 15px;
    }
    
    .section-title {
      font-size: 2.5rem;
      color: var(--c-lighter);
      text-align: center;
      margin-bottom: 3rem;
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
      text-shadow: 0 0 10px rgba(100, 255, 218, 0.5);
    }
    
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -10px;
      left: 50%;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background: var(--c-accent);
      border-radius: 2px;
      box-shadow: 0 0 10px rgba(100, 255, 218, 0.5);
    }
    
    .btn {
      display: inline-block;
      padding: 0.8rem 2rem;
      background: transparent;
      color: var(--c-accent);
      font-weight: 600;
      border-radius: 4px;
      text-decoration: none;
      transition: var(--transition);
      border: 1px solid var(--c-accent);
      position: relative;
      overflow: hidden;
      z-index: 1;
    }
    
    .btn::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 0;
      height: 100%;
      background: rgba(100, 255, 218, 0.1);
      transition: width 0.5s ease;
      z-index: -1;
    }
    
    .btn:hover::before {
      width: 100%;
    }
    
    .btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 5px 15px rgba(100, 255, 218, 0.4);
    }

    /* ==================== NAVBAR ==================== */
    nav.navbar { 
      top: 0; 
      left: 0; 
      width: 100%; 
      padding: 1rem 0; 
      background: rgba(10, 25, 47, 0.85); 
      backdrop-filter: blur(10px); 
      z-index: 1000;
      border-bottom: 1px solid rgba(100, 255, 218, 0.1);
      transition: var(--transition);
    }
    
    nav.navbar.scrolled {
      padding: 0.6rem 0;
      box-shadow: var(--shadow);
    }
    
    nav.navbar .container { 
      display: flex; 
      align-items: center; 
      justify-content: space-between; 
      flex-wrap: wrap;
    }
    
    nav.navbar .logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    
    nav.navbar .logo img { 
      height: 45px; 
      transition: var(--transition); 
      cursor: pointer; 
      filter: drop-shadow(0 0 5px rgba(100, 255, 218, 0.5));
    }
    
    nav.navbar .logo img:hover { 
      transform: rotate(-5deg) scale(1.1); 
    }
    
    nav.navbar .logo span {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--c-lighter);
      background: linear-gradient(90deg, var(--c-accent), var(--c-lighter));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      text-shadow: 0 0 10px rgba(100, 255, 218, 0.3);
    }
    
    nav.navbar .nav-links { 
      display: flex; 
      gap: 2.5rem; 
      flex-wrap: wrap;
    }
    
    nav.navbar .nav-links a { 
      position: relative; 
      color: var(--c-light); 
      text-decoration: none; 
      font-weight: 500; 
      transition: var(--transition); 
      font-size: 1.05rem;
      padding: 0.5rem 0;
    }
    
    nav.navbar .nav-links a::after { 
      content: ''; 
      position: absolute; 
      bottom: 0; 
      left: 0; 
      width: 0; 
      height: 2px; 
      background: var(--c-accent); 
      transition: var(--transition); 
    }
    
    nav.navbar .nav-links a:hover { 
      color: var(--c-accent); 
      text-shadow: 0 0 8px rgba(100, 255, 218, 0.5);
    }
    
    nav.navbar .nav-links a:hover::after { 
      width: 100%; 
    }
    
    nav.navbar .telegram-login {
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    
    .telegram-btn {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 0.7rem 1.5rem;
      background: #0088cc;
      color: white;
      border-radius: 50px;
      text-decoration: none;
      transition: var(--transition);
      font-weight: 600;
      box-shadow: 0 4px 15px rgba(0, 136, 204, 0.3);
    }
    
    .telegram-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 6px 20px rgba(0, 136, 204, 0.5);
      background: #0077b3;
    }

    /* ==================== HERO ==================== */
    section.hero { 
      min-height: 100vh; 
      display: flex; 
      align-items: center; 
      justify-content: center; 
      text-align: center; 
      padding: 0 1rem; 
      position: relative;
      overflow: hidden;
    }
    
    .hero-content {
      max-width: 800px;
      padding-top: 80px;
      z-index: 10;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      margin: 0 auto;
    }
    
    section.hero h1 { 
      font-size: 3.5rem; 
      font-weight: 900; 
      background: linear-gradient(90deg, var(--c-accent), var(--c-lighter)); 
      -webkit-background-clip: text; 
      -webkit-text-fill-color: transparent; 
      margin-bottom: 1.5rem;
      line-height: 1.2;
      text-shadow: 0 0 20px rgba(100, 255, 218, 0.3);
      text-align: center;
    }
    
    section.hero p { 
      font-size: 1.25rem; 
      margin: 1.5rem 0; 
      color: var(--c-light); 
      opacity: 0.9; 
      line-height: 1.7;
      text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
      text-align: center;
    }
    
    .hero-btns {
      display: flex;
      gap: 1rem;
      justify-content: center;
      margin-top: 2rem;
      flex-wrap: wrap;
    }
    
    .hero-btn {
      padding: 0.9rem 2.5rem;
      border-radius: 4px;
      font-weight: 700;
      text-decoration: none;
      transition: var(--transition);
      display: inline-block;
      z-index: 10;
    }
    
    .primary-btn {
      background: var(--c-accent);
      color: var(--c-primary);
      box-shadow: 0 5px 15px rgba(100, 255, 218, 0.4);
    }
    
    .primary-btn:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(100, 255, 218, 0.6);
    }
    
    .secondary-btn {
      background: transparent;
      color: var(--c-accent);
      border: 1px solid var(--c-accent);
    }
    
    .secondary-btn:hover {
      background: rgba(100, 255, 218, 0.1);
      transform: translateY(-5px);
      box-shadow: 0 0 15px rgba(100, 255, 218, 0.3);
    }

    /* ==================== GRID SECTIONS ==================== */
    .grid-section { 
      padding: 6rem 0; 
      position: relative;
    }
    
    .grid { 
      display: grid; 
      gap: 2rem; 
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); 
    }
    
    .card { 
      background: rgba(17, 34, 64, 0.7); 
      backdrop-filter: blur(8px); 
      border-radius: 8px; 
      padding: 2.5rem 2rem;
      position: relative; 
      overflow: hidden; 
      box-shadow: var(--shadow);
      transition: var(--transition);
      border: 1px solid rgba(100, 255, 218, 0.2);
      display: flex;
      flex-direction: column;
      text-align: center;
    }
    
    .card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--c-accent);
      transform: scaleY(0);
      transform-origin: top;
      transition: transform 0.5s ease;
    }
    
    .card:hover::before {
      transform: scaleY(1);
    }
    
    .card:hover { 
      transform: translateY(-10px); 
      box-shadow: 0 20px 30px -15px rgba(2,12,27,0.8);
      border-color: var(--c-accent);
    }
    
    .card-icon {
      font-size: 2.5rem;
      color: var(--c-accent);
      margin-bottom: 1.5rem;
      text-shadow: 0 0 10px rgba(100, 255, 218, 0.5);
      text-align: center;
    }
    
    .card h3 { 
      font-size: 1.5rem; 
      margin-bottom: 1rem; 
      color: var(--c-lighter); 
      position: relative;
      display: inline-block;
      text-align: center;
      width: 100%;
    }
    
    .card h3::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 50%;
      transform: translateX(-50%);
      width: 40px;
      height: 2px;
      background: var(--c-accent);
      border-radius: 2px;
    }
    
    .card p { 
      font-size: 1rem; 
      line-height: 1.7; 
      color: var(--c-light); 
      margin-bottom: 1.5rem;
      flex-grow: 1;
      text-align: center;
    }
    
    .card a.btn { 
      margin: 0 auto;
      margin-top: auto;
    }

    /* ==================== FEATURES ==================== */
    .features { 
      display: flex; 
      flex-direction: column; 
      gap: 5rem; 
    }
    
    .feature { 
      display: flex; 
      align-items: center; 
      gap: 4rem; 
      background: rgba(17, 34, 64, 0.5);
      border-radius: 10px;
      padding: 3rem;
      transition: var(--transition);
      border: 1px solid rgba(100, 255, 218, 0.2);
      text-align: center;
    }
    
    .feature:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow);
      border-color: var(--c-accent);
    }
    
    .feature:nth-child(even) { 
      flex-direction: row-reverse; 
    }
    
    .feature img { 
      width: 45%; 
      border-radius: 8px; 
      box-shadow: var(--shadow);
      transition: var(--transition);
    }
    
    .feature:hover img {
      transform: scale(1.02);
    }
    
    .feature .text { 
      width: 55%; 
      text-align: center;
    }
    
    .feature .text h2 { 
      font-size: 1.8rem; 
      margin-bottom: 1.5rem; 
      color: var(--c-lighter); 
      position: relative;
      display: inline-block;
      text-align: center;
      width: 100%;
    }
    
    .feature .text h2::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 50%;
      transform: translateX(-50%);
      width: 50px;
      height: 3px;
      background: var(--c-accent);
      border-radius: 2px;
    }
    
    .feature .text p { 
      font-size: 1.1rem; 
      line-height: 1.8; 
      color: var(--c-light); 
      text-align: center;
    }

    



    /* ==================== FAQ ==================== */
    .faq { 
      padding: 5rem 0; 
    }
    
    .faq-container {
      max-width: 800px;
      margin: 0 auto;
      text-align: center;
    }
    
    .faq-item { 
      margin-bottom: 1.2rem; 
      background: rgba(17, 34, 64, 0.7);
      border-radius: 8px;
      border: 1px solid rgba(100, 255, 218, 0.2);
      overflow: hidden;
      transition: var(--transition);
    }
    
    .faq-item:hover {
      border-color: var(--c-accent);
    }
    
    .faq-item summary { 
      font-weight: 700; 
      cursor: pointer; 
      color: var(--c-lighter); 
      list-style: none;
      padding: 1.5rem;
      position: relative;
      font-size: 1.1rem;
      text-align: center;
    }
    
    .faq-item summary::after {
      content: '+';
      position: absolute;
      left: 1.5rem;
      top: 50%;
      transform: translateY(-50%);
      font-size: 1.2rem;
      color: var(--c-accent);
      transition: var(--transition);
    }
    
    .faq-item details[open] summary::after {
      transform: translateY(-50%) rotate(45deg);
    }
    
    .faq-item summary::marker { 
      display: none; 
    }
    
    .faq-item details[open] summary { 
      color: var(--c-accent); 
    }
    
    .faq-item p { 
      margin: 0; 
      padding: 0 1.5rem 1.5rem; 
      color: var(--c-light); 
      line-height: 1.7;
      text-align: center;
    }

    /* ==================== FOOTER ==================== */
    footer { 
      background: rgba(10, 25, 47, 0.9); 
      backdrop-filter: blur(10px); 
      padding: 4rem 0 2rem; 
      border-top: 1px solid rgba(100, 255, 218, 0.1);
      text-align: center;
    }
    
    .footer-content {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 3rem;
      margin-bottom: 3rem;
    }
    
    .footer-column h3 {
      font-size: 1.3rem;
      color: var(--c-lighter);
      margin-bottom: 1.5rem;
      position: relative;
      padding-bottom: 0.5rem;
      text-align: center;
    }
    
    .footer-column h3::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 40px;
      height: 2px;
      background: var(--c-accent);
    }
    
    .footer-column p {
      color: var(--c-light);
      line-height: 1.7;
      margin-bottom: 1.5rem;
      text-align: center;
    }
    
    .footer-links {
      list-style: none;
      text-align: center;
    }
    
    .footer-links li {
      margin-bottom: 0.8rem;
    }
    
    .footer-links a {
      color: var(--c-light);
      text-decoration: none;
      transition: var(--transition);
      display: inline-block;
    }
    
    .footer-links a:hover {
      color: var(--c-accent);
    }
    
    .social-links {
      display: flex;
      gap: 1rem;
      margin-top: 1.5rem;
      justify-content: center;
    }
    
    .social-links a {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: rgba(100, 255, 218, 0.1);
      color: var(--c-accent);
      transition: var(--transition);
    }
    
    .social-links a:hover {
      transform: translateY(-5px);
      background: var(--c-accent);
      color: var(--c-primary);
      box-shadow: 0 0 10px rgba(100, 255, 218, 0.5);
    }
    
    .copyright {
      text-align: center;
      padding-top: 2rem;
      border-top: 1px solid rgba(100, 255, 218, 0.1);
      color: var(--c-light);
      font-size: 0.9rem;
    }

    /* ==================== RESPONSIVE ==================== */
    @media(max-width: 1024px) {
      section.hero h1 { 
        font-size: 3rem; 
      }
      
      .feature {
        gap: 2rem;
        padding: 2rem;
      }
      
      .test-options {
        grid-template-columns: 1fr;
      }
    }
    
    @media(max-width: 900px) {
      .feature .text, .feature img { 
        width: 100%; 
      }
    }
    
    @media(max-width: 768px) {
      html { font-size: 15px; }
      
      nav.navbar .container {
        flex-direction: column;
        gap: 1rem;
      }
      
      nav.navbar .nav-links {
        gap: 1.5rem;
        justify-content: center;
      }
      
      section.hero h1 { 
        font-size: 2.5rem; 
      }
      
      .feature { 
        flex-direction: column; 
        text-align: center;
      }
      
      .feature:nth-child(even) { 
        flex-direction: column; 
      }
      
      .hero-btns {
        flex-direction: column;
        align-items: center;
      }
      
      .hero-btns .hero-btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
      }
      
      .modal-content {
        padding: 2rem 1.5rem;
      }
    }
    
    @media(max-width: 480px) {
      section.hero h1 { 
        font-size: 2rem; 
      }
      
      .section-title {
        font-size: 2rem;
      }
      
      .card {
        padding: 2rem 1.5rem;
      }
      
      .modal-title {
        font-size: 2rem;
      }
    }
    
    /* Animations */
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }
    
    .fade-in {
      animation: fadeIn 0.8s ease forwards;
    }
    
    .delay-1 { animation-delay: 0.1s; }
    .delay-2 { animation-delay: 0.2s; }
    .delay-3 { animation-delay: 0.3s; }
    .delay-4 { animation-delay: 0.4s; }
    
    .user-avatar {
      border-radius: 50%;
      overflow: hidden;
    }

    .user-avatar {
      width: 100px;
      height: 100px;
    }

    .user-avatar:hover {
      transform: scale(1.1);
    }

    /* Performance optimizations */
    .performance-mode .stars,
    .performance-mode .shooting-star,
    .performance-mode .section-title::after,
    .performance-mode .card:hover,
    .performance-mode .feature:hover,
    .performance-mode .btn:hover,
    .performance-mode .nav-links a:hover::after,
    .performance-mode .social-links a:hover,
    .performance-mode .hero-btn:hover {
      animation: none !important;
      transition: none !important;
      transform: none !important;
    }

    .performance-mode .night-sky {
      background: #0a0f2b;
    }

    .performance-mode .card::before,
    .performance-mode .feature img:hover,
    .performance-mode .btn::before {
      display: none;
    }

    .performance-mode .feature img,
    .performance-mode .test-icon img {
      transform: none !important;
    }

    .performance-mode .card,
    .performance-mode .feature,
    .performance-mode .faq-item {
      box-shadow: none;
    }

    .performance-mode .test-option:hover {
      transform: none;
      box-shadow: none;
    }

    .performance-mode .modal {
      backdrop-filter: none;
    }

    /* Low-end device specific styles */
    @media (max-width: 768px), (max-height: 600px) {
      .low-power-mode {
        animation: none !important;
        transition: none !important;
      }
    }
    
    /*---------------------*/
      #popup-search-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(24, 26, 32, 0.85);
        z-index: 9999;
        display: flex;
        align-items: flex-start;
        justify-content: center;
        padding-top: 8vh;
      }
      .popup-search-iframe-box {
        position: relative;
        display: flex;
        flex-direction: column;
        align-items: flex-end;
      }
      .popup-search-iframe-box iframe {
        background: #181a20;
      }
      .close-search-btn {
        position: absolute;
        left: 1rem;
        top: 1rem;
        background: none;
        border: none;
        color: #fff;
        font-size: 1.3rem;
        cursor: pointer;
        z-index: 2;
      }
      .close-search-btn:hover {
        color: #00b4d8;
      }

      @media (max-width: 700px) {
        .popup-search-iframe-box iframe {
          width: 98vw;
          height: 80vh;
          min-width: 0;
        }
      }
      
            .search-mode-btn {
        background: #23262f;
        color: #00b4d8;
        border: 2px solid #00b4d8;
        border-radius: 8px;
        padding: 0.5rem 1.2rem;
        font-size: 1rem;
        font-weight: bold;
        cursor: pointer;
        transition: background 0.2s, color 0.2s;
      }
      .search-mode-btn.active,
      .search-mode-btn:hover {
        background: #00b4d8;
        color: #fff;
      }
      .search-section {
        position: relative;
      }
      
          .popup-search-iframe-box,
      .popup-search-iframe-box iframe {
        scrollbar-color: #00b4d8 #23262f;
        scrollbar-width: thin;
        direction: rtl;
      }
      .popup-search-iframe-box::-webkit-scrollbar,
      .popup-search-iframe-box iframe::-webkit-scrollbar {
        width: 12px;
        background: #23262f;
      }
      .popup-search-iframe-box::-webkit-scrollbar-thumb,
      .popup-search-iframe-box iframe::-webkit-scrollbar-thumb {
        background: #00b4d8;
        border-radius: 8px;
        border: 2px solid #23262f;
      }
      .popup-search-iframe-box::-webkit-scrollbar-track,
      .popup-search-iframe-box iframe::-webkit-scrollbar-track {
        background: #181a20;
        border-radius: 8px;
      }
      
}



/*-------------------------------*/

        .notification-bar {
            background-color: #FFD700; /* لون أصفر */
            color: #000;
            text-align: center;
            padding: 10px 0;
            font-size: 16px;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        }
        
        .notification-bar a {
            color: #000;
            background-color: #FFA500;
            padding: 3px 10px;
            border-radius: 4px;
            text-decoration: none;
            font-weight: bold;
            margin-right: 10px;
            transition: background-color 0.3s;
        }
        
        .notification-bar a:hover {
            background-color: #FF8C00;
        }
        
        .content {
            margin-top: 50px;
            padding: 20px;
        }