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

:root {
    --bg:           #03080f;
    --text-primary: #e8f4f8;
    --text-muted:   #7fa8c0;
    --accent:       #38bdf8;
    --accent-hover: #7dd3fc;
    --font:         'Space Grotesk', sans-serif;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--bg);
    color: var(--text-primary);
    font-family: var(--font);
    -webkit-font-smoothing: antialiased;
}

/* ── Canvas ── */

#pulsar-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* ── Overlay ── */

.overlay {
    position: fixed;
    inset: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: clamp(2rem, 5vh, 3.5rem) 1.5rem;
    /* subtle vignette so text is always legible */
    background: radial-gradient(ellipse at 50% 40%, transparent 40%, rgba(3, 8, 15, 0.55) 100%);
}

/* ── Header ── */

header {
    text-align: center;
}

.wordmark {
    font-size: clamp(2.2rem, 5.5vw, 4rem);
    font-weight: 700;
    letter-spacing: 0.35em;
    margin-bottom: 1rem;
    line-height: 1;
}

.logo-full {
    height: clamp(2.8rem, 6vw, 4.2rem);
    width: auto;
}

.tagline {
    font-size: clamp(0.8rem, 1.4vw, 0.95rem);
    font-weight: 300;
    color: var(--text-muted);
    max-width: 460px;
    line-height: 1.7;
    margin: 0 auto;
}

/* ── Main ── */

main {
    text-align: center;
    max-width: 520px;
    width: 100%;
}

.description {
    font-size: clamp(0.88rem, 1.4vw, 1rem);
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.stealth-badge {
    display: inline-block;
    border: 1px solid rgba(56, 189, 248, 0.45);
    color: var(--accent);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    padding: 0.35rem 0.9rem;
    margin-bottom: 8rem;
}

.cta-text {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 0.85rem;
}

/* ── Email form ── */

.email-form {
    display: flex;
    max-width: 400px;
    margin: 0 auto;
}

.email-form input {
    flex: 1;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(56, 189, 248, 0.25);
    border-right: none;
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.88rem;
    padding: 0.7rem 1rem;
    outline: none;
    transition: border-color 0.2s;
    min-width: 0;
}

.email-form input::placeholder {
    color: var(--text-muted);
    opacity: 0.55;
}

.email-form input:focus {
    border-color: var(--accent);
}

.email-form button {
    background: var(--accent);
    border: 1px solid var(--accent);
    color: var(--bg);
    font-family: var(--font);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.7rem 1.1rem;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s, border-color 0.2s;
    letter-spacing: 0.02em;
}

.email-form button:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

/* ── Footer ── */

footer {
    font-size: 0.78rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

footer a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--accent);
}

.sep {
    opacity: 0.35;
}

/* ── Responsive ── */

@media (max-width: 480px) {
    .email-form {
        flex-direction: column;
    }
    .email-form input {
        border-right: 1px solid rgba(56, 189, 248, 0.25);
        border-bottom: none;
    }
    .email-form input:focus {
        border-color: var(--accent);
    }
    .email-form button {
        padding: 0.7rem;
    }
}