body.bg-app {
    background-color: #0b1120;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    user-select: none;
}

.app-shell {
    max-width: 480px;
}

.bg-app-header {
    background-color: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
}

.bg-card {
    background-color: #1e293b;
}

.btn-nav {
    color: #64748b;
    font-size: 0.72rem;
    border: none;
    background: transparent;
    padding: 2px 12px;
}

.btn-nav.active {
    color: #10b981;
    font-weight: 600;
}

.pulse-sos {
    animation: sosPulse 2s infinite;
}

@keyframes sosPulse {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.6); }
    70% { box-shadow: 0 0 0 8px rgba(239, 68, 68, 0); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.breathing-circle {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    border: 4px solid #10b981;
    background: radial-gradient(circle, rgba(16,185,129,0.25) 0%, rgba(15,23,42,0) 70%);
    animation: breathe 8s ease-in-out infinite;
}

@keyframes breathe {
    0%, 100% { transform: scale(0.88); border-color: #3b82f6; }
    50% { transform: scale(1.18); border-color: #10b981; }
}