* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
    height: 100%;
    overflow: hidden;
    background: #fafafa;
    font-family: 'Space Grotesk', -apple-system, sans-serif;
}

#constellation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Product panel */
.panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: #fff;
    display: flex;
    flex-direction: column;
    pointer-events: none;
    box-shadow: -20px 0 60px rgba(0,0,0,0.08);
    will-change: transform, opacity;
    opacity: 0;
    transform: translateX(100%);
}

.panel.active {
    pointer-events: auto;
}

.panel-inner {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 6vh 5vw 18vh 5vw;
    overflow-y: auto;
}

.panel h1 {
    font-size: clamp(3.5rem, 8vw, 6rem);
    font-weight: 700;
    letter-spacing: -0.05em;
    line-height: 0.9;
    margin-bottom: 0.3em;
}

.panel .tagline {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    color: #555;
    margin-bottom: 2.5em;
    font-weight: 400;
    line-height: 1.4;
    max-width: 450px;
}

.panel .screenshot {
    width: 100%;
    max-width: 700px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 25px 80px rgba(0,0,0,0.18);
    margin-bottom: 2.5em;
}

.video-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 2.5em;
    max-width: 700px;
}

.video-wrap {
    flex: 1;
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
}

.video-wrap iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.12);
}

.panel-cta {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 3em;
}

.panel .price {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.panel .actions {
    display: flex;
    gap: 0.75rem;
}

.panel .actions a,
.panel .actions button {
    font-family: inherit;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    padding: 1.1em 2.2em;
    cursor: pointer;
    transition: all 0.2s ease;
}

.panel .actions a {
    color: #000;
    background: transparent;
    border: 1.5px solid #000;
}

.panel .actions button {
    background: #000;
    color: #fff;
    border: 1.5px solid #000;
}

.panel .actions a:hover {
    background: #000;
    color: #fff;
}

.panel .actions button:hover {
    background: #222;
}

.panel .actions button.btn-demo {
    background: transparent;
    color: #000;
    border: 1.5px solid #000;
}

.panel .actions button.btn-demo:hover {
    background: #f5f5f5;
}

.panel .actions a.loading {
    pointer-events: none;
    opacity: 0.6;
}

.panel-details {
    margin-top: auto;
    padding-top: 1.5em;
    padding-bottom: 1.5em;
    border-top: 1px solid #eee;
}

.panel-details summary {
    font-size: 0.7rem;
    color: #999;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    list-style: none;
}

.panel-details summary::-webkit-details-marker {
    display: none;
}

.panel-details summary::after {
    content: " +";
}

.panel-details[open] summary::after {
    content: " −";
}

.panel .features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem 2rem;
    margin-top: 1.2em;
    color: #666;
    font-size: 0.8rem;
    line-height: 1.5;
}

.panel .feature {
    padding-left: 1em;
    position: relative;
}

.panel .feature::before {
    content: "–";
    position: absolute;
    left: 0;
    color: #ccc;
}

.back {
    position: fixed;
    top: 5vh;
    left: 5vw;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #aaa;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, color 0.15s;
    z-index: 20;
}

.back:hover {
    color: #000;
}

.back.active {
    opacity: 1;
    pointer-events: auto;
}

.logo {
    position: fixed;
    top: 5vh;
    right: 5vw;
    height: 32px;
    z-index: 10;
    transition: opacity 0.3s;
    display: flex;
    align-items: center;
    cursor: pointer;
}

.logo.hidden {
    opacity: 0;
}

/* Footer */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 3rem;
    padding: 3vh 0 4vh 0;
    background: linear-gradient(to top, rgba(250,250,250,1) 0%, rgba(250,250,250,1) 50%, rgba(250,250,250,0) 100%);
    z-index: 20;
}

.footer a {
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-decoration: none;
    color: #bbb;
    transition: color 0.15s;
}

.footer a:hover {
    color: #000;
}

.constellation-subtitle {
    position: fixed;
    bottom: 12vh;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    color: #bbb;
    letter-spacing: 0.03em;
    z-index: 5;
    transition: opacity 0.3s;
    text-align: center;
}

.constellation-subtitle.hidden {
    opacity: 0;
}