html {
    scroll-behavior: smooth;
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease-out;
}

.fade-in.show {
    opacity: 1;
    transform: translateY(0);
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: #1f6f6f;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
    background-color: #249999;
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

a {
    color: #fff;
    text-decoration: none;
    transition: color 0.25s ease;
}

a:hover {
    color: #24bfbf;
}

.card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.framed-img {
    border-radius: 12px;
    padding: 6px;

    /* space between image and frame */
    background: #ffffff;

    /* frame color */
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: white;
}