:root {
     --gold: #FFD700;
}
 * {
     margin: 0;
     padding: 0;
     box-sizing: border-box;

}
 html,
 body {
     font-family: 'Roboto', sans-serif;
     line-height: 1.7;
     color: #eee;
     background: linear-gradient(to bottom, #16213e, #0f3460);
     overflow-x: hidden;
}
 h1, h2, h3, h4 {
     font-family: 'Playfair Display', serif;
}
/* NAV */
 nav {
     background: linear-gradient(to bottom, #16213e, #0f3460);
     padding: 1.2em 2em;
     position: sticky;
     top: 0;
     z-index: 100;
     backdrop-filter: blur(12px);
     box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}
 nav ul {
     list-style: none;
     display: grid;
     grid-template-columns: auto auto auto auto auto;
     justify-content: center;
     gap: 3em;
}
 nav li a {
     color: #fff;
     text-decoration: none;
     font-weight: 700;
     font-size: 1.05em;
     position: relative;
     transition: color 0.3s, transform 0.3s;
}
 nav li a::after {
     content: '';
     position: absolute;
     width: 0;
     height: 3px;
     bottom: -6px;
     left: 0;
     background: var(--gold);
     transition: width 0.4s cubic-bezier(0.23,1,0.32,1);
}
 nav li a:hover::after, nav li a.active::after {
     width: 100%;
}
 nav li a:hover, nav li a.active {
     color: var(--gold);
     transform: translateY(-2px);
}
 .hamburger {
     display: none;
}
/* HERO */
  header {
     position: relative;
     height: 100vh;
     display: flex;
     flex-direction: column;
     justify-content: center;
     align-items: center;
     text-align: center;
     color: #fff;
     overflow: hidden;
     background: linear-gradient(to bottom, #001f3f, #000033);
     perspective: 1px;
}
 .hero h1 {
     font-size: 3.6rem;
     margin-bottom: 1.2rem;
     line-height: 1.1;
}
 .hero p {
     font-size: 1.35rem;
     max-width: 720px;
     margin: 0 auto 2.5rem;
     color: #ddd;
}
 main {
     background: linear-gradient(to bottom, #001f3f, #000033);
     padding: 4rem 2rem 6rem;
}
 .section {
     max-width: 1200px;
     margin: 0 auto 6rem;
}
 .section-header {
     text-align: center;
     margin-bottom: 3.5rem;
}
 .section-header span {
     background: rgba(255,215,0,0.15);
     color: var(--gold);
     padding: 0.4rem 1.2rem;
     border-radius: 30px;
     font-size: 0.95rem;
     letter-spacing: 1px;
}
 .grid {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
     gap: 2rem;
}
 .card {
     background: rgba(255,255,255,0.06);
     border-radius: 16px;
     overflow: hidden;
     transition: transform 0.3s, box-shadow 0.3s;
}
 .card:hover {
     transform: translateY(-8px);
     box-shadow: 0 20px 30px rgba(0, 0, 0, 0.4);
}
 .card-preview {
     height: 260px;
     background: #222;
     display: flex;
     align-items: center;
     justify-content: center;
     font-size: 1.1rem;
     color: #888;
     border-bottom: 1px solid rgba(255,255,255,0.1);
}
 .card-body {
     padding: 1.4rem;
}
 .card h3 {
     margin: 0 0 0.6rem;
     font-size: 1.35rem;
}
 .card p {
     color: #aaa;
     font-size: 0.95rem;
}
 .download {
     display: inline-block;
     margin-top: 1.2rem;
     color: var(--gold);
     font-weight: 700;
     text-decoration: none;
}
 .download:hover {
     text-decoration: underline;
}
.imageSpot{
    width: auto;
    height: 100%;

}
/* Dev Notes cards are wider */
 .notes-grid {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
     gap: 2rem;
}
 .note-card {
     background: rgba(255,255,255,0.06);
     border-radius: 16px;
     padding: 2rem;
     transition: transform 0.3s;
}
 .note-card:hover {
     transform: translateY(-8px);
}
 .tag {
     background: #0f3460;
     color: #4fc3f7;
     padding: 0.3rem 1rem;
     border-radius: 20px;
     font-size: 0.85rem;
     display: inline-block;
}

/* Lead capture */
 .lead-box {
     max-width: 620px;
     margin: 6rem auto 2rem;
     text-align: center;
     background: rgba(255,255,255,0.05);
     padding: 3rem 2rem;
     border-radius: 20px;
     border: 1px solid rgba(255,215,0,0.2);
}
 footer {
     text-align: center;
     padding: 3rem 2rem;
     color: #888;
     font-size: 0.95rem;
}
 @media (max-width: 768px) {
     nav ul {
         grid-template-columns: 1fr;
         gap: 1.5em;
         text-align: center;
    }
     .hero h1 {
         font-size: 2.8rem;
    }
    form {
        flex-direction: column;
    }
    form button {
        height: 10vh;
    }
}
#particles-js {
     position: absolute;
     width: 100%;
     height: 100%;
     top: 0;
     left: 0;
     z-index: 0;
     transform: translateZ(-1px) scale(2);
}

.checksum-wrap {
    max-width: 100%;
    overflow: hidden;
}

.checksum-label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.85rem;
    color: #cfcfcf;
}

.checksum-code {
    display: block;
    max-width: 100%;
    overflow-x: auto;
    white-space: nowrap;
    padding: 0.75rem;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.35);
    font-size: 0.78rem;
    line-height: 1.5;
}