/* Full-screen splash / main menu overlay */
.splash-overlay {
    position: fixed;
    inset: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
    background:
        radial-gradient(circle at top, rgba(136, 204, 255, 0.18), transparent 55%),
        radial-gradient(circle at bottom, rgba(0, 255, 204, 0.18), transparent 55%),
        #050607;
    backdrop-filter: blur(10px);
    animation: splashFadeIn 0.4s ease-out;
}

/* Centered content card */
.splash-inner {
    padding: 24px 20px 20px;
    max-width: min(480px, 90vw);
    text-align: center;
    background: radial-gradient(circle at top, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.95));
    border-radius: 16px;
    border: 1px solid rgba(136, 204, 255, 0.4);
    box-shadow:
        0 0 32px rgba(0, 0, 0, 0.9),
        0 0 40px rgba(0, 255, 204, 0.18);
}

/* Title: luminous monochrome logotype */
.splash-title {
    font-size: clamp(26px, 6vw, 36px);
    letter-spacing: 0.28em;
    text-indent: 0.28em;
    text-transform: uppercase;
    font-weight: 700;
    color: #e6f7ff;
    text-shadow:
        0 0 12px rgba(136, 204, 255, 0.9),
        0 0 28px rgba(0, 255, 204, 0.65);
    margin-bottom: 10px;
}

/* Tagline */
.splash-subtitle {
    font-size: 13px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: #9fb3c7;
    margin-bottom: 20px;
}

/* Button row */
.splash-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

/* Base splash button */
.splash-btn {
    min-width: 120px;
    min-height: 40px;
    padding: 8px 18px;
    border-radius: 999px;
    border: 1px solid rgba(158, 175, 192, 0.5);
    background: radial-gradient(circle at top, rgba(12, 18, 24, 0.9), rgba(5, 8, 12, 0.95));
    color: #e6f7ff;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, transform 0.12s ease;
}

/* Primary action */
.splash-btn.primary {
    border-color: rgba(0, 255, 204, 0.8);
    box-shadow: 0 0 18px rgba(0, 255, 204, 0.45);
}

/* Secondary / disabled state */
.splash-btn.secondary {
    opacity: 0.65;
    cursor: default;
}

.splash-btn.secondary:disabled {
    border-style: dashed;
}

/* Hover / active feedback */
.splash-btn.primary:hover {
    background: radial-gradient(circle at top, rgba(0, 30, 40, 0.95), rgba(0, 10, 16, 0.98));
    border-color: rgba(136, 204, 255, 1);
    box-shadow:
        0 0 20px rgba(0, 255, 204, 0.7),
        0 0 40px rgba(136, 204, 255, 0.4);
    transform: translateY(-1px);
}

.splash-btn:active {
    transform: translateY(0);
    box-shadow: 0 0 10px rgba(0, 255, 204, 0.4);
}

/* Build meta line */
.splash-meta {
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #708191;
    opacity: 0.9;
}

/* Animations */
@keyframes splashFadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.splash-fade-out {
    animation: splashFadeOut 0.35s ease-in forwards;
}

@keyframes splashFadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}