/* BLUE THEME – Bulletproof Time Zone Utility */

.btz-container{
    max-width:720px;
    margin:20px auto;
    border:1px solid #b7c9e2;
    background:#f3f7fc;
    font-family:system-ui,Segoe UI,Arial;
    font-size:13px;
    border-radius:6px;
    box-shadow:0 4px 12px rgba(0,60,120,0.08);
}

.btz-header{
    background:linear-gradient(90deg,#0a3d91,#1e6bd6);
    color:#fff;
    text-align:center;
    padding:12px;
    font-size:12px;
    letter-spacing:1px;
    border-radius:6px 6px 0 0;
}

.btz-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:12px;
    padding:14px;
}

.btz-field{
    display:flex;
    flex-direction:column;
}

.btz-field label{
    font-size:11px;
    margin-bottom:5px;
    color:#123a6f;
    font-weight:600;
}

.btz-input-wrap{
    display:flex;
    gap:6px;
}

.btz-field input{
    padding:8px;
    border:1px solid #a9c1e8;
    background:#fff;
    font-size:13px;
    border-radius:4px;
}

.btz-field input:focus{
    outline:none;
    border-color:#1e6bd6;
    box-shadow:0 0 0 2px rgba(30,107,214,0.15);
}

#autoDetect{
    width:38px;
    background:#e8f0ff;
    border:1px solid #a9c1e8;
    color:#1e6bd6;
    font-weight:bold;
    border-radius:4px;
    cursor:pointer;
}

#autoDetect:hover{
    background:#dbe8ff;
}

#calcBtn{
    margin:0 14px 14px 14px;
    width:calc(100% - 28px);
    padding:12px;
    background:linear-gradient(90deg,#0a3d91,#1e6bd6);
    color:#fff;
    border:none;
    font-size:13px;
    letter-spacing:1px;
    border-radius:6px;
    cursor:pointer;
    box-shadow:0 4px 10px rgba(30,107,214,0.25);
}

#calcBtn:hover{
    filter:brightness(1.05);
}

#resultBox{
    border-top:1px solid #c9d9f0;
    padding:14px;
    background:#f9fbff;
}

.btz-main{
    text-align:center;
    margin-bottom:12px;
}

#destName{
    font-size:12px;
    color:#2b5fa8;
}

#destTime{
    font-size:26px;
    font-weight:700;
    color:#0a3d91;
}

.btz-meta{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:8px;
    font-size:12px;
    margin-bottom:12px;
    color:#123a6f;
}

.btz-callbox{
    border:1px solid #c9d9f0;
    background:#ffffff;
    padding:10px;
    border-radius:6px;
    margin-top:10px;
}

.btz-call-title{
    font-size:11px;
    margin-bottom:8px;
    color:#0a3d91;
    font-weight:700;
    letter-spacing:0.5px;
}

/* Call windows */
.call-green{
    color:#1b5e20;
    font-weight:700;
    padding:3px 0;
}

.call-orange{
    color:#b26a00;
    font-weight:700;
    padding:3px 0;
}

.call-red{
    color:#8b0000;
    font-weight:700;
    padding:3px 0;
}

/* Actions */
.btz-actions{
    display:flex;
    gap:10px;
    margin-top:12px;
}

.btz-actions button{
    flex:1;
    padding:10px;
    font-size:12px;
    border-radius:6px;
    border:1px solid #a9c1e8;
    background:linear-gradient(180deg,#f0f6ff,#dbe8ff);
    color:#0a3d91;
    cursor:pointer;
    font-weight:600;
}

.btz-actions button:hover{
    background:linear-gradient(180deg,#e3efff,#cfe0ff);
}

/* Mobile */
@media(max-width:520px){
    .btz-grid{
        grid-template-columns:1fr;
        gap:10px;
    }

    #destTime{
        font-size:22px;
    }

    .btz-actions{
        flex-direction:column;
    }
}