/* Screens & Overlays for Outbreak Protocol */
.screen-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(15, 23, 42, 0.94), rgba(4, 7, 15, 0.98));
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    color: #fff;
    text-align: center;
    padding: 24px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.screen-badge {
    display: inline-block;
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #ef4444;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.screen-title {
    font-size: clamp(2.4rem, 6vw, 4.5rem);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 4px;
    margin: 0 0 8px 0;
    background: linear-gradient(180deg, #ffffff 40%, #ef4444 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 32px var(--primary-glow);
}

.screen-sub {
    font-size: 1.05rem;
    color: #94a3b8;
    margin-bottom: 24px;
    letter-spacing: 1.5px;
    max-width: 540px;
    line-height: 1.5;
}

.high-score-badge {
    background: rgba(6, 182, 212, 0.12);
    border: 1px solid rgba(6, 182, 212, 0.3);
    color: #38bdf8;
    padding: 6px 16px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.instructions-box {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-left: 4px solid var(--accent);
    border-radius: 12px;
    padding: 16px 24px;
    max-width: 580px;
    text-align: left;
    margin-bottom: 26px;
    line-height: 1.7;
    font-size: 0.9rem;
    color: #cbd5e1;
}

.instructions-box key {
    background: rgba(6, 182, 212, 0.15);
    color: #38bdf8;
    padding: 2px 7px;
    border-radius: 4px;
    border: 1px solid rgba(6, 182, 212, 0.35);
    font-weight: 700;
    font-size: 0.85rem;
}

.btn-primary {
    background: linear-gradient(135deg, #ef4444, #b91c1c);
    color: #fff;
    border: none;
    padding: 15px 44px;
    font-size: 1.15rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 10px 28px var(--primary-glow);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary:hover {
    transform: scale(1.04) translateY(-2px);
    box-shadow: 0 14px 36px rgba(239, 68, 68, 0.75);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    margin: 6px;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.18);
    transform: translateY(-2px);
}

.screen-back-btn {
    position: absolute;
    top: 24px;
    left: 24px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 8px 18px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.14);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 110;
}

.screen-back-btn:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.14);
    border-color: var(--accent);
    box-shadow: 0 0 16px var(--accent-glow);
    transform: translateX(-3px);
}

.screen-actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 10px;
}

.screen-btn-link {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* Wave Banner Announcement */
#waveBanner {
    position: absolute;
    top: 36%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    font-size: clamp(2.5rem, 5vw, 3.8rem);
    font-weight: 900;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 6px;
    text-shadow: 0 0 28px var(--primary-glow);
    pointer-events: none;
    opacity: 0;
    z-index: 20;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

#waveBanner.visible {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.0);
}