* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    min-height: 100vh;
    background: #030712;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

main {
    width: 100%;
    max-width: 580px;
    background: #0f1219;
    color: #a0aec0;
    padding: 2rem;
    border-radius: 36px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    box-shadow: 0 20px 40px -10px #00000080;
    border: 1px solid #1f2937;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    padding: 0.75rem 1rem;
    background: #3b82f6;
    color: white;
    border-radius: 18px;
    box-shadow: 0 8px 20px #3b82f640;
}

.title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #f0f0f0;
}

.subtitle {
    font-size: 0.7rem;
    color: #6b7a8f;
}

.toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    background: #1a1f2b;
    padding: 0.3rem;
    border-radius: 40px;
}

.btn {
    padding: 0.5rem 1rem;
    border-radius: 40px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    color: #8f9eb5;
    white-space: nowrap;
}

.activeToggle {
    background: #3b82f6;
    color: white;
}

.display {
    background: #0a0d14;
    padding: 2rem;
    border-radius: 28px;
    border: 1px solid #1f2a3a;
}

.time {
    font-size: clamp(2.5rem, 10vw, 4.2rem);
    color: #ffffff;
    font-weight: 500;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
    font-variant-numeric: tabular-nums;
    word-break: break-word;
}

#dating {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed #2a3440;
}

.day {
    font-size: clamp(1rem, 4vw, 1.2rem);
    color: #3b82f6;
    font-weight: 500;
}

#date {
    font-size: clamp(0.9rem, 3.5vw, 1rem);
    color: #b0c0d0;
}

.foot {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: #4b5b70;
    padding-top: 0.5rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* Tablet */
@media (max-width: 768px) {
    main {
        max-width: 500px;
        padding: 1.8rem;
    }
    
    .display {
        padding: 1.5rem;
    }
}

/* Mobile */
@media (max-width: 480px) {
    body {
        padding: 0.8rem;
    }
    
    main {
        padding: 1.2rem;
        border-radius: 28px;
        gap: 1.2rem;
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .toggle {
        width: 100%;
        justify-content: center;
    }
    
    .btn {
        flex: 1;
        text-align: center;
    }
    
    .display {
        padding: 1.2rem;
    }
    
    .time {
        text-align: center;
        margin-bottom: 1rem;
    }
    
    #dating {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .foot {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 0.3rem;
    }
}

/* Small Mobile */
@media (max-width: 360px) {
    .brand {
        flex-wrap: wrap;
    }
    
    .logo {
        padding: 0.6rem 0.8rem;
    }
    
    .time {
        letter-spacing: 1px;
    }
}