:root{
    --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
    --font-display: 'Orbitron', var(--font-sans);
    --accent: #47ffed; /* teal-cyan */
    --muted: #8bf8cf;
    --header-height: 84px;
    --bg-start: #202124;
    --bg-end: #000000;
}

/* Global */
html, body{
    height: 100%;
    margin: 0;
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, var(--bg-start), var(--bg-end));
    color: var(--muted);
    font-family: var(--font-sans);
    -webkit-font-smoothing:antialiased;
    text-rendering: optimizeLegibility;
    letter-spacing: 0.01em;
}

/* Header / Navigation */
.header{
    position: fixed;
    top: 0; left: 0; width: 100%;
    padding: 14px 22px;
    background: linear-gradient(90deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    backdrop-filter: blur(6px);
    display:flex; align-items:center; justify-content:space-between;
    z-index:1000; box-sizing:border-box;
    border-bottom: 1px solid rgba(71,255,237,0.06);
}

.logo{ max-width:140px; height:auto; filter: drop-shadow(0 6px 18px rgba(71,255,237,0.08)); }

.nav-links{ display:flex; gap:18px; }

.nav-links a{
    font-family: var(--font-display);
    color: transparent;
    background: linear-gradient(90deg, var(--accent), #b4eaff);
    -webkit-background-clip: text;
    background-clip: text;
    text-decoration:none;
    padding:8px 12px;
    border-radius:6px;
    font-size:15px;
    letter-spacing:0.12em;
    transition: transform 160ms ease, opacity 160ms ease;
    opacity:0.98;
}

.nav-links a:hover{ transform: translateY(-3px); opacity:1; }

@media (max-width:768px){
    .nav-links{ flex-direction:column; gap:10px; align-items:center; }
    .header{ justify-content:center; padding:12px; }
    .logo{ margin-bottom:8px; }
}

/* 3D and layout */
.content{ display:flex; gap:36px; align-items:center; justify-content:center; height:calc(100vh - 84px); padding:28px; box-sizing:border-box; }
.right-col h2{ font-family: var(--font-display); font-size:1.9rem; margin:0 0 12px; color:transparent; background:linear-gradient(90deg,var(--accent),#b4eaff); -webkit-background-clip:text; background-clip:text; letter-spacing:0.06em; }
.right-col p{ margin:0 0 16px; color:var(--muted); line-height:1.65; font-size:1.05rem; }
.right-col .read-more{ display:inline-block; font-family:var(--font-display); color:var(--accent); text-decoration:none; padding:8px 12px; border-radius:8px; border:1px solid rgba(71,255,237,0.08); transition:background 160ms ease, transform 160ms ease; }
.right-col .read-more:hover{ transform:translateY(-3px); background: rgba(71,255,237,0.02); }

.left-col {
    flex: 1 1 60%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.left-col model-viewer,
.left-col model-viewer::part(scene) {
    width: 92vmin;
    height: 92vmin;
    max-width: 920px;
    max-height: 920px;
    /* push model down much further to fully clear the header */
    transform: translateY(20vh);
    margin-bottom: 20vh; /* match transform to maintain centering */
}

.right-col {
    flex: 1 1 36%;
    max-width: 560px;
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    padding: 26px;
    border-radius: 12px;
    box-shadow: 0 18px 48px rgba(0,0,0,0.6);
}

.right-col h2 {
    font-family: var(--font-display);
    font-size: 1.9rem;
    margin: 0 0 12px;
    color: transparent;
    background: linear-gradient(90deg,var(--accent),#b4eaff);
    -webkit-background-clip: text;
    background-clip: text;
    letter-spacing: 0.06em;
}

.right-col p {
    margin: 0 0 16px;
    color: var(--muted);
    line-height: 1.65;
    font-size: 1.05rem;
}

.right-col .read-more {
    display: inline-block;
    font-family: var(--font-display);
    color: var(--accent);
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid rgba(71,255,237,0.08);
    transition: background 160ms ease, transform 160ms ease;
}

.right-col .read-more:hover {
    transform: translateY(-3px);
    background: rgba(71,255,237,0.02);
}

@media (max-width: 880px) {
    .content {
        flex-direction: column;
        height: auto;
        padding-top: 110px;
    }

    .left-col,
    .right-col {
        width: 100%;
        max-width: 920px;
    }

    .left-col { order: 1 }
    .right-col { order: 2 }
}

/* Ensure AboutUs nav-buttons match the index nav-links appearance */
.nav-buttons a{
    font-family: var(--font-display);
    color: transparent;
    background: linear-gradient(90deg, var(--accent), #b4eaff);
    -webkit-background-clip: text;
    background-clip: text;
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 15px;
    letter-spacing: 0.12em;
}

/* Modal styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: 1100;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    display: flex;
    opacity: 1;
}

.modal-content {
    position: relative;
    background: linear-gradient(135deg, var(--bg-start), var(--bg-end));
    border: 1px solid rgba(71,255,237,0.1);
    padding: 32px;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    margin: auto;
    box-shadow: 0 24px 64px rgba(0,0,0,0.6);
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.close-modal {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 28px;
    color: var(--muted);
    cursor: pointer;
    transition: color 0.2s ease;
}

.close-modal:hover {
    color: var(--accent);
}

.modal h2 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    margin: 0 0 24px;
    color: transparent;
    background: linear-gradient(90deg, var(--accent), #b4eaff);
    -webkit-background-clip: text;
    background-clip: text;
    letter-spacing: 0.06em;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--muted);
    font-family: var(--font-display);
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(71,255,237,0.1);
    border-radius: 8px;
    color: var(--muted);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M2 4L6 8L10 4' stroke='%2347ffed' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-group input[type="date"],
.form-group input[type="time"] {
    color-scheme: dark;
}

.form-group textarea {
    height: 120px;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(255,255,255,0.05);
}

.submit-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(90deg, var(--accent), #b4eaff);
    border: none;
    border-radius: 8px;
    color: var(--bg-start);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
    opacity: 0.95;
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.form-message {
    margin-top: 16px;
    padding: 12px;
    border-radius: 6px;
    text-align: center;
    font-family: var(--font-sans);
    animation: fadeIn 0.3s ease;
}

.form-message.success {
    background: rgba(71,255,237,0.1);
    color: var(--accent);
    border: 1px solid rgba(71,255,237,0.2);
}

.form-message.error {
    background: rgba(255,71,71,0.1);
    color: #ff4747;
    border: 1px solid rgba(255,71,71,0.2);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 880px){
    .content{ flex-direction:column; height:auto; padding-top:110px; }
    .left-col, .right-col{ width:100%; max-width:920px; }
    .left-col{ order:1 }
    .right-col{ order:2 }
}

/* About page specifics */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto auto;
    gap: 36px;
    max-width: 1400px;
    margin: 100px auto 0;
    padding: 28px;
}

.text-col, .bottom-text-col, .bottom-text-col-2 {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 26px;
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    border-radius: 12px;
    box-shadow: 0 18px 48px rgba(0,0,0,0.6);
}

.bottom-text-col h2 {
    font-family: var(--font-display);
    font-weight: 700;
    color: transparent;
    background: linear-gradient(90deg,var(--accent),#b4eaff);
    -webkit-background-clip: text;
    background-clip: text;
    font-size: 2rem;
    margin-bottom: 6px;
    letter-spacing: 0.06em;
}

.feature-image-container {
    width: 100%;
    height: 100%;
    min-height: 300px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.6);
}

.feature-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 400ms ease;
}

.feature-image:hover {
    transform: scale(1.05);
}

.text-col h1 {
    font-family: var(--font-display);
    font-weight: 700;
    color: transparent;
    background: linear-gradient(90deg,var(--accent),#b4eaff);
    -webkit-background-clip: text;
    background-clip: text;
    font-size: 2.4rem;
    margin-bottom: 6px;
    letter-spacing: 0.06em;
}

.text-col p {
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--muted);
    margin: 0 0 14px;
}

.slideshow-col {
    display: flex;
    align-items: center;
}

.slideshow-container {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.6);
}

.slide {
    display: none;
    width: 100%;
}

.slide.active {
    display: block;
}

.slide img {
    width: 100%;
    height: auto;
    display: block;
}

.prev, .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 24px;
    color: var(--muted);
    background: rgba(0,0,0,0.45);
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    transition: background 160ms ease, transform 160ms ease;
}

.prev:hover, .next:hover {
    background: rgba(0,0,0,0.65);
    transform: translateY(-50%) scale(1.1);
}

.prev { left: 12px }
.next { right: 12px }

@media (max-width: 880px) {
    .about-content {
        grid-template-columns: 1fr;
        margin-top: 84px;
    }

    .text-col {
        order: 2;
        text-align: center;
    }

    .slideshow-col {
        order: 1;
    }

    .bottom-text-col {
        order: 4;
        text-align: center;
    }

    .bottom-image-col {
        order: 3;
    }

    .bottom-text-col-2 {
        order: 6;
        text-align: center;
    }

    .bottom-image-col-2 {
        order: 5;
    }

    .feature-image-container {
        min-height: 250px;
    }
}