/* RESET */
*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

/* BODY */
body{
    font-family:'Segoe UI',sans-serif;
    background:#eef4fb;
    display:flex;
    justify-content:center;
    align-items:center;
    padding:2px 1px;
}

/* SECTION */
.flight-form-section{
    width:100%;
    display:flex;
    justify-content:center;
}

/* CONTAINER */
.flight-form-container{
    width:100%;
    max-width:1100px;
    background:#ffffff;
    border-radius:11px;
    padding:20px;
    box-shadow:0 05px 20px rgba(0,0,0,0.08);
}

/* HEADER */
.form-header{
    margin-bottom:15px;
}

.form-header h2{
    font-size:28px;
    color:#111827;
    margin-bottom:9px;
    font-weight:500;
}

.form-header p{
    color:#6b7280;
    font-size:14px;
}

/* TAB BUTTONS */
.trip-tabs{
    display:flex;
    gap:10px;
    margin-bottom:18px;
}

.tab-btn{
    border:none;
    background:#e5e7eb;
    color:#111827;
    padding:14px 28px;
    border-radius:12px;
    cursor:pointer;
    font-weight:1400;
    transition:0.3s;
}

.tab-btn.active{
    background:#1d9eb7;
    color:white;
}

.tab-btn:hover{
    transform:translateY(-2px);
}

/* GRID */
.form-grid{
    display:grid;
    gap:22px;
    margin-bottom:22px;
}

.two-column{
    grid-template-columns:repeat(2,1fr);
}

.four-column{
    grid-template-columns:repeat(4,1fr);
}

/* INPUT GROUP */
.input-group{
    display:flex;
    flex-direction:column;
}

/* LABEL */
.input-group label{
    margin-bottom:8px;
    font-size:14px;
    font-weight:600;
    color:#374151;
}

/* INPUT WRAPPER */
.input-wrapper{
    position:relative;
}

.input-wrapper i{
    position:absolute;
    left:16px;
    top:50%;
    transform:translateY(-50%);
    color:#6b7280;
    font-size:15px;
}

/* INPUTS */
.input-group input,
.input-group select{
    width:100%;
    height:54px;
    border:1px solid #d1d5db;
    border-radius:12px;
    padding:0 16px;
    font-size:15px;
    background:white;
    transition:0.3s;
}

/* ICON INPUT SPACING */
.input-wrapper input{
    padding-left:48px;
}

/* FOCUS */
.input-group input:focus,
.input-group select:focus{
    outline:none;
    border-color:#0ea5e9;
    box-shadow:0 0 0 4px rgba(14,165,233,0.15);
}

/* BUTTON */
.submit-btn{
    width:100%;
    height:58px;
    border:none;
    border-radius:14px;
    background:linear-gradient(135deg,#1d9eb7,#2563eb);
    color:white;
    font-size:17px;
    font-weight:700;
    cursor:pointer;
    transition:0.3s;
    margin-top:10px;
}

.submit-btn:hover{
    transform:translateY(-2px);
    box-shadow:0 10px 25px rgba(14,165,233,0.3);
}

.form-grid{
    display:grid;
    gap:22px;
    margin-bottom:22px;
}

.two-column{
    grid-template-columns:repeat(2,1fr);
}

/* RESPONSE */
#responseMessage{
    margin-bottom:20px;
}

/* MOBILE */
@media(max-width:992px){

    .four-column{
        grid-template-columns:repeat(2,1fr);
    }

}

@media(max-width:768px){

    .flight-form-container{
        padding:25px;
    }

    .two-column,
    .four-column{
        grid-template-columns:1fr;
    }

    .form-header h2{
        font-size:28px;
    }

}