:root {
      --primary: #273774;
      --accent: #57e0ff;
      --text: #ffffff;
      --text-light: #e0f2fe;
      --bg-dark: #0f1a2e;
      --glass: rgba(39, 55, 116, 0.15);
      --border: rgba(87, 224, 255, 0.3);
      --shadow: 0 15px 35px rgba(39, 55, 116, 0.2);
    }

    * { margin: 0; padding: 0; box-sizing: border-box; }
    body {
      font-family: 'Inter', sans-serif;
      background: var(--bg-dark);
      color: var(--text-light);
      line-height: 1.8;
      overflow-x: hidden;
    }
    .navbar-expand-lg {
        z-index: 999999;}
.offcanvas.offcanvas-end{display: none;}
    h1, h2, h3, h4, h5, h6 {
      font-family: 'Playfair Display', serif;
      font-weight: 800;
    }

    /* Preloader */
    #preloader {
      position: fixed; top: 0; left: 0; width: 100%; height: 100vh;
      background: var(--primary); display: flex; align-items: center; justify-content: center;
      z-index: 9999; transition: 0.6s;
    }
    .loader {
      width: 80px; height: 80px; border: 6px solid rgba(87, 224, 255, 0.2);
      border-top: 6px solid var(--accent); border-radius: 50%;
      animation: spin 1s linear infinite;
    }
    @keyframes spin { to { transform: rotate(360deg); } }

    /* Theme Toggle */
    .theme-toggle {
      position: fixed; top: 20px; right: 20px; width: 50px; height: 50px;
      background: var(--glass); border: 1px solid var(--border); border-radius: 50%;
      display: flex; align-items: center; justify-content: center; font-size: 1.3rem;
      cursor: pointer; z-index: 1001; backdrop-filter: blur(10px); transition: 0.3s;
      box-shadow: 0 0 20px rgba(87, 224, 255, 0.3);
    }

    /* Navbar */
    .navbar {
      backdrop-filter: blur(20px); background: var(--glass); border-bottom: 1px solid var(--border);
      padding: 1.2rem 0; transition: 0.4s; box-shadow: 0 0 30px rgba(87, 224, 255, 0.1);
    }
    .navbar.scrolled { padding: 0.6rem 0; background: rgba(39, 55, 116, 0.9); }
    .navbar-brand {
      font-size: 1.8rem; font-weight: 900; color: white !important;
      background: linear-gradient(90deg, white, var(--accent));
      -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    }
    .nav-link {
      color: white !important; font-weight: 600; position: relative;
      padding: 0.5rem 1rem !important; transition: 0.3s;
    }
    .nav-link::after {
      content: ''; position: absolute; bottom: 0; left: 50%; width: 0; height: 3px;
      background: var(--accent); transition: 0.4s; transform: translateX(-50%);
    }
    .nav-link:hover::after, .nav-link.active::after { width: 80%; }

    /* Hero */
    .hero {
      height: 100vh; position: relative; overflow: hidden; display: flex; align-items: center;
    }
    .hero-bg {
      position: absolute; top: 0; left: 0; width: 100%; height: 100%;
      background: url('assets/img/slider/slide1a.jpg') center/cover no-repeat;
      transform: scale(1.1); transition: 10s;
      filter: brightness(0.6);
    }
    .hero::after {
      content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
      background: linear-gradient(135deg, rgba(39,55,116,0.9), rgba(87,224,255,0.2));
    }
    .hero-content {
          position: relative;
    z-index: 2;
    text-align: left;
    max-width: 900px;
    }
    .hero h1 {
      font-size: 5.5rem; font-weight: 900; line-height: 1.1;
      background: linear-gradient(90deg, white, var(--accent), white);
      -webkit-background-clip: text; -webkit-text-fill-color: transparent;
      text-shadow: 0 0 40px rgba(87, 224, 255, 0.5);
    }
    .hero p {
      font-size: 1.6rem; margin: 1.5rem 0; font-weight: 300;    color: #fff;
    }
    .btn-glow {
      background: transparent; color: white; border: 2px solid var(--accent);
      padding: 1rem 3rem; border-radius: 50px; font-weight: 700; text-transform: uppercase;
      letter-spacing: 2px; position: relative; overflow: hidden; transition: 0.5s;
      box-shadow: 0 0 20px rgba(87, 224, 255, 0.4);
    }
    .btn-glow:hover {
      background: var(--accent); color: var(--primary); box-shadow: 0 0 40px rgba(87, 224, 255, 0.8);
      transform: translateY(-5px);
    }
    .btn-glow::before {
      content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
      transition: 0.7s;
    }
    .btn-glow:hover::before { left: 100%; }

    /* Section Title */
    .section-title {
      font-size: 3.5rem; text-align: center; margin-bottom: 3rem; position: relative;
       color: #8091d1;
    }
    .section-title::after {
      content: ''; position: absolute; bottom: -15px; left: 50%; transform: translateX(-50%);
      width: 120px; height: 5px; background: var(--accent); border-radius: 3px;
      box-shadow: 0 0 20px var(--accent);
    }

    /* Glass Cards */
    .glass-card {
     backdrop-filter: blur(20px); border-radius: 24px;
        padding: 15px;
 height: 100%; border: 1px solid var(--border);
      transition: 0.6s; box-shadow: var(--shadow);
      position: relative; overflow: hidden;
    }
    .glass-card::before {
      content: ''; position: absolute; top: -2px; left: -2px; right: -2px; bottom: -2px;
      background: linear-gradient(45deg, var(--accent), var(--primary), var(--accent));
      border-radius: 24px; z-index: -1; opacity: 0; transition: 0.6s;
    }
    .glass-card:hover::before { opacity: 1; }
    .glass-card:hover {
      transform: translateY(-20px) scale(1.02);
      box-shadow: 0 0 60px rgba(87, 224, 255, 0.4);
    }

    .icon-circle {
      width: 90px;     height: 80px;margin: 0 auto 1.5rem;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 50%; display: flex; align-items: center; justify-content: center;
      font-size: 2.2rem; color: white; box-shadow: 0 0 30px rgba(87, 224, 255, 0.5);
      transition: 0.6s;
    }
    .glass-card img{    height: 250px;
    width: 100%;}
    .glass-card:hover .icon-circle {
      transform: scale(1.15) rotate(15deg);
      box-shadow: 0 0 50px rgba(87, 224, 255, 0.8);
    }

    .strengths-section {
    background: linear-gradient(135deg, #0a0f1e 0%, #121826 100%);
    padding: 100px 0;
    position: relative;
  }

  .gradient-text {
    background: linear-gradient(90deg, var(--accent), var(--accent-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  /* Card Styling */
  .strength-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 2rem 1.5rem;
    text-align: center;
    height: 100%;
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  }

  .strength-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(87, 224, 255, 0.1), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
  }

  .strength-card:hover::before { opacity: 1; }
  .strength-card:hover {
    transform: translateY(-12px) scale(1.02);
    border-color: var(--accent);
    box-shadow: 0 25px 50px rgba(87, 224, 255, 0.25);
  }

  .strength-card > * { position: relative; z-index: 2; }

  /* Icon Pulse Effect */
  .icon-pulse {
    position: relative;
    width: 80px; height: 80px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .icon-pulse i {
    font-size: 2.2rem;
    color: var(--accent);
    z-index: 2;
  }

  .pulse-ring {
    position: absolute;
    width: 100%; height: 100%;
    border: 3px solid var(--accent);
    border-radius: 50%;
    animation: pulseRing 2s infinite;
    opacity: 0;
  }

  .strength-card:hover .pulse-ring {
    animation: pulseRing 1.5s infinite;
    opacity: 0.6;
  }

  @keyframes pulseRing {
    0% { transform: scale(0.8); opacity: 0; }
    50% { opacity: 0.6; }
    100% { transform: scale(1.6); opacity: 0; }
  }

  /* Glow Under Card */
  .card-glow {
    position: absolute;
    bottom: 0; left: 50%;
    width: 80%; height: 40%;
    background: radial-gradient(ellipse at center, var(--accent) 0%, transparent 70%);
    filter: blur(20px);
    opacity: 0;
    transform: translateX(-50%);
    transition: opacity 0.4s ease;
    z-index: 1;
  }

  .strength-card:hover .card-glow { opacity: 0.3; }

  /* Nexus Lines */
  .nexus-lines {
    position: absolute;
    top: 50%; left: 50%;
    width: 100%; max-width: 1200px;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 1;
  }

  /* Background Orbs */
  .bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.12;
    z-index: 0;
    animation: float 12s infinite ease-in-out;
  }

  .orb-left {
    width: 500px; height: 500px;
    background: var(--accent);
    top: -10%; left: -10%;
  }

  .orb-right {
    width: 400px; height: 400px;
    background: var(--accent-dark);
    bottom: -15%; right: -10%;
    animation-delay: -6s;
  }
  .social-float a{text-decoration: none!important;}
 h3.hoverclass{      position: absolute;
    width: 275px;
    right: 10px;
 top: 272px;}
    .icon-circle:hover h3 {
    color: white;
    position: absolute;
    width: 275px;
    right: -30px;
}
  @keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-40px) rotate(10deg); }
  }
    #strengths .small {font-size: 16px;
    color: #d0d0d0;}
     .contibg   {background: linear-gradient(45deg, #1b2639, #48abd3);    border-radius: 10px;}
  /* Responsive */
  @media (max-width: 768px) {
    h3.hoverclass {
         position: absolute;
        width: 210px;
        right: 16px;
        top: 280px;
        font-size: 20px;
}
.navbar-glass .nav-link::after{display: none;}
.offcanvas-body{    background: #212529;        position: relative;
        top: -8px;}
.mtabout30{margin-top: 30px!important;}
    .strength-card { padding: 1.5rem 1rem; }
    .icon-pulse { width: 65px; height: 65px; }
    .icon-pulse i { font-size: 1.8rem; }
    .nexus-lines { display: none; }
  }

    /* About */
    .about-img {
      border-radius: 24px; overflow: hidden; box-shadow: var(--shadow);
    }
    .about-img img { transition: 0.6s;    height: 400px;    width: 100%; }
    .about-img:hover img { transform: scale(1.1); }

/* BACK TO TOP - FULLY FIXED */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 55px;
  height: 55px;
  background: #57e0ff;
  color: #273774;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  box-shadow: 0 8px 25px rgba(87, 224, 255, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 9999;
  text-decoration: none;
  border: 2px solid rgba(39, 55, 116, 0.3);
  backdrop-filter: blur(10px);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: white;
  transform: translateY(-8px) scale(1.1);
  box-shadow: 0 15px 35px rgba(87, 224, 255, 0.7);
}

.back-to-top i {
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

    @media (max-width: 768px) {
      .offcanvas.offcanvas-end{display: block;}
      .hero h1 { font-size: 3rem; }
      .section-title { font-size: 2.5rem; }
    }

    /* Glassmorphism Navbar */
.navbar-glass {
  backdrop-filter: blur(16px);
  background: rgba(39, 55, 116, 0.25);
  border-bottom: 1px solid rgba(87, 224, 255, 0.2);
  transition: all 0.4s ease;
  padding: 1rem 0;
  z-index: 1050;
}

.navbar-glass.scrolled {
  padding: 0.5rem 0;
  background: rgba(39, 55, 116, 0.7);
  box-shadow: 0 8px 32px rgba(39, 55, 116, 0.3);
}
  .hero  {background: url(../../assets/img/slider/slide1a.jpg);
    background-size: cover;
    background-attachment: fixed;
    background-blend-mode: multiply;
    display: flex
;
    align-items: center;
    min-height: 350px;
    background-position: bottom;}
/* Brand */
.brand-glass {
  font-size: 1.5rem;
  font-weight: 700;
  color: white !important;
  text-decoration: none;
  transition: 0.3s;
}
.brand-glass:hover { transform: scale(1.05); }

/* Nav Links */
.navbar-glass .nav-link {
  color: rgba(255, 255, 255, 0.9) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  border-radius: 8px;
  position: relative;
  transition: all 0.3s ease;
}

.navbar-glass .nav-link:hover,
.navbar-glass .nav-link.active {
  color: #57e0ff !important;
  background: rgba(87, 224, 255, 0.1);
}

.navbar-glass .nav-link::after {
  content: '';
  position: absolute;
  bottom: 8px; left: 50%;
  width: 0; height: 2px;
  background: #57e0ff;
  transition: 0.3s;
  transform: translateX(-50%);
}

.navbar-glass .nav-link:hover::after,
.navbar-glass .nav-link.active::after {
  width: 70%;
}

/* Toggler Icon */
.toggler-icon {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  height: 20px;
}
.toggler-icon span {
  display: block;
  height: 3px;
  background: #57e0ff;
  border-radius: 2px;
  transition: 0.3s;
}
.navbar-toggler[aria-expanded="true"] .toggler-icon span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.navbar-toggler[aria-expanded="true"] .toggler-icon span:nth-child(2) { opacity: 0; }
.navbar-toggler[aria-expanded="true"] .toggler-icon span:nth-child(3) { transform: rotate(-45deg) translate(7px, -6px); }

/* Accent Button */
.btn-accent {
  background: linear-gradient(135deg, #57e0ff, #273774);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  transition: 0.4s;
  box-shadow: 0 4px 15px rgba(87, 224, 255, 0.3);
}
.btn-accent:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(87, 224, 255, 0.5);
  background: linear-gradient(135deg, #273774, #57e0ff);
}
/* footer */
  /* Footer Base */
  .mednexus-footer {
    background: linear-gradient(135deg, #0a0f1e 0%, #121826 50%, #0a0f1e 100%);
    color: white;
    position: relative;
    margin-top: 30px;
    overflow: hidden;
  }

  /* Wavy Top */
  .wave-top {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    z-index: 1;
  }

  .wave-top svg {
    width: 100%;
    height: 100%;
  }

  /* Glass Cards */
  .glass-card {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    transition: all 0.3s ease;
  }

  .glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(87, 224, 255, 0.15);
    border-color: rgba(87, 224, 255, 0.3);
  }

  /* Links */
  .footer-links li {
    margin-bottom: 0.6rem;
  }

  .footer-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: all 0.3s ease;
    display: inline-block;
  }

  .footer-link::before {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -2px;
    left: 0;
    background: linear-gradient(90deg, #57e0ff, #00aaff);
    transition: width 0.3s ease;
  }

  .footer-link:hover {
    color: #57e0ff;
    transform: translateX(4px);
  }

  .footer-link:hover::before {
    width: 100%;
  }

  /* Newsletter */
  .newsletter-box {
    position: relative;
  }

  .pulse {
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
  }

  .glass-input {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 12px 0 0 12px;
  }

  .glass-input::placeholder {
    color: rgba(255, 255, 255, 0.6);
  }

  .glass-input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: #57e0ff;
    box-shadow: 0 0 0 3px rgba(87, 224, 255, 0.2);
    color: white;
  }

  .btn-icon {
    border-radius: 0 12px 12px 0;
    padding: 0 1rem;
  }

  /* Social Floating Buttons */
  .social-float {
    display: flex;
    gap: 12px;
    justify-content: center;
  }

  .social-btn {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
  }

  .social-btn::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(135deg, #57e0ff, #00aaff);
    transform: scale(0);
    border-radius: 50%;
    transition: transform 0.4s ease;
    z-index: 0;
  }

  .social-btn i {
    position: relative;
    z-index: 1;
    transition: color 0.3s ease;
  }

  .social-btn:hover {
    transform: translateY(-6px) rotate(5deg);
    box-shadow: 0 15px 25px rgba(87, 224, 255, 0.3);
  }

  .social-btn:hover::before {
    transform: scale(1);
  }

  .social-btn:hover i {
    color: #0a0f1e;
  }

  /* Tooltip */
  .social-btn::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #0a0f1e;
    color: #57e0ff;
    padding: 6px 10px;
    border-radius: 8px;
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    margin-bottom: 8px;
    pointer-events: none;
  }

  .social-btn:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-4px);
  }

  /* Glow Orbs */
  .glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 0;
    opacity: 0.15;
  }

  .orb-1 {
    width: 400px;
    height: 400px;
    background: #57e0ff;
    top: -10%;
    left: -10%;
    animation: float 8s infinite ease-in-out;
  }

  .orb-2 {
    width: 300px;
    height: 300px;
    background: #00aaff;
    bottom: -15%;
    right: -5%;
    animation: float 10s infinite ease-in-out reverse;
  }

  @keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(5deg); }
  }

  /* Responsive */
  @media (max-width: 768px) {
    .social-float {
      justify-content: center;
      margin-top: 1rem;
    }
  }


    /* Subscribe Form */
    .subscribe-form {
      max-width: 380px;
    }

    .subscribe-input {
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid var(--border);
      color: white;
      border-radius: 50px 0 0 50px;
      padding: 0.75rem 1.2rem;
      font-size: 0.95rem;
      backdrop-filter: blur(10px);
      transition: 0.4s;
    }

    .subscribe-input::placeholder {
      color: rgba(255, 255, 255, 0.6);
    }

    .subscribe-input:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 15px rgba(87, 224, 255, 0.3);
      background: rgba(255, 255, 255, 0.15);
    }

    .subscribe-btn {
      background: var(--accent);
      color: var(--primary);
      border: none;
      border-radius: 0 50px 50px 0;
      padding: 0.75rem 1.2rem;
      font-weight: 700;
      cursor: pointer;
      transition: 0.4s;
      position: relative;
      overflow: hidden;
    }

    .subscribe-btn i {
      transition: 0.4s;
    }

    .subscribe-btn:hover {
      background: white;
      transform: translateX(5px);
      box-shadow: 0 0 20px rgba(87, 224, 255, 0.6);
    }

    .subscribe-btn:hover i {
      transform: translateX(5px);
    }

    .subscribe-btn::before {
      content: '';
      position: absolute;
      top: 50%; left: 50%;
      width: 0; height: 0;
      background: rgba(255, 255, 255, 0.3);
      border-radius: 50%;
      transform: translate(-50%, -50%);
      transition: 0.6s;
    }

    .subscribe-btn:active::before {
      width: 300px; height: 300px;
    }

    /* Social Icons */
    .social-icons {
      display: flex;
      gap: 1rem;
      margin-top: 1.5rem;
    }

    .social-icon {
      width: 45px; height: 45px;
      background: var(--glass);
      border: 1px solid var(--border);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-size: 1.2rem;
      transition: 0.5s;
      position: relative;
      overflow: hidden;
      backdrop-filter: blur(10px);
    }

    .social-icon:hover {
      transform: translateY(-5px) rotate(360deg);
      background: var(--accent);
      color: var(--primary);
      box-shadow: 0 0 25px rgba(87, 224, 255, 0.6);
    }

    .social-icon::before {
      content: '';
      position: absolute;
      top: 50%; left: 50%;
      width: 0; height: 0;
      background: rgba(255, 255, 255, 0.3);
      border-radius: 50%;
      transform: translate(-50%, -50%);
      transition: 0.6s;
    }

    .social-icon:hover::before {
      width: 200px; height: 200px;
    }

    
    /* Arrow Scroll to Top Button */
    .arrow-top {
      position: fixed;
      bottom: 30px;
      right: 30px;
      width: 56px;
      height: 56px;
        background: #67739d;
      color: #000;
      border: none;
      border-radius: 50%;
      font-size: 1.5rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--glow);
      opacity: 0;
      visibility: hidden;
      transform: translateY(20px) scale(0.8);
      transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
      z-index: 999;
      backdrop-filter: blur(8px);
    }

    .arrow-top.show {
      opacity: 1;
      visibility: visible;
      transform: translateY(0) scale(1);
    }

    .arrow-top:hover {
      transform: translateY(-6px) scale(1.12);
      box-shadow: 0 0 45px rgba(0, 212, 255, 0.7);
    }

    .arrow-top:active {
      transform: translateY(-4px) scale(1.08);
    }

    .arrow-top i {
      animation: bounce 2s infinite; color: #fff;
    }

    @keyframes bounce {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-6px); }
    }

    /* Responsive */
    @media (max-width: 576px) {
      .arrow-top {
        width: 48px;
        height: 48px;
        font-size: 1.3rem;
        bottom: 20px;
        right: 20px;
      }
    }