body {
    background-image: url('https://images.unsplash.com/photo-1506905925346-21bda4d32df4?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.clock-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    box-shadow: 0 25px 45px rgba(0, 0, 0, 0.3);
    padding: 2.5rem;
    max-width: 500px;
    width: 100%;
    transition: transform 0.3s ease;
}

.clock-card:hover {
    transform: translateY(-5px);
}

.time {
    text-shadow: 0 0 20px rgba(0, 123, 255, 0.5);
    font-family: 'Digital-7', monospace;
    letter-spacing: 0.1em;
}

.btn-primary {
    background: linear-gradient(45deg, #007bff, #0056b3);
    border: none;
    padding: 0.75rem 2rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(0, 123, 255, 0.4);
}

.alarm {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1rem;
    animation: slideIn 0.4s ease-out;
    transition: all 0.3s;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.form-control {
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.2);
    color: white;
    backdrop-filter: blur(10px);
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.form-control:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
    background: rgba(255, 255, 255, 0.3);
}

.btn-danger, .btn-warning {
    border-radius: 25px;
    padding: 0.5rem 1.5rem;
    font-size: 0.875rem;
}

.alarm-ringing {
    animation: pulse 0.5s infinite;
    background: rgba(255, 0, 0, 0.2) !important;
    border-color: #ff0000 !important;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

@media (max-width: 576px) {
    .clock-card {
        padding: 1.5rem;
        margin: 1rem;
    }
    .time {
        font-size: 2.5rem;
    }
}