/*  RESET  */
*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:'Segoe UI',sans-serif;
}

body{
    background:#f7f9fc;
    color:#1f2937;
    line-height:1.6;
}

/*  CONTAINER  */
.container{
    width:100%;
    max-width:1200px;
    margin:auto;
    padding:25px;
}

/*  NAVBAR  */
.navbar{
    width:100%;
    max-width:1200px;
    margin:15px auto;

    padding:12px 30px;

    display:flex;
    justify-content:space-between;
    align-items:center;

    background:rgba(255,255,255,0.85);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);

    border-radius:18px;

    box-shadow:0 6px 20px rgba(0,0,0,0.06);

    position:sticky;
    top:12px;
    z-index:999;

    border:1px solid rgba(255,255,255,0.6);
}

.logo{
    font-weight:800;
    letter-spacing:0.3px;
}

.logo img{
    width:110px;
    height:auto;
    display:block;
}

.nav-links{
    list-style:none;
    align-items:center;
    display:flex;
    gap:20px;
}

.nav-links a{
    text-decoration:none;
    color:#1d4ed8;
    font-weight:600;
    transition:.3s;
}

.nav-links a:hover{
    color:#2563eb;
}

.nav-links .active{
    color:#2563eb;
}

/*  HERO  */
.hero{
    max-width:1200px;
    margin:auto;
    padding:70px 20px;

    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:60px;
}

.hero-text{
    flex:1;
}

.hero-text h1{
    font-size:55px;
    line-height:1.2;
    margin-bottom:20px;
    font-weight:800;
}

.hero-text span{
    color:#2563eb;
}

.hero-text p{
    color:#6b7280;
    margin-bottom:30px;
}

.hero-buttons{
    display:flex;
    gap:15px;
}

.btn-primary{
    background:#2563eb;
    color:white;
    text-decoration:none;
    padding:14px 22px;
    border-radius:12px;
    font-weight:600;
}

.btn-secondary{
    border:1px solid #2563eb;
    color:#2563eb;
    text-decoration:none;
    padding:14px 22px;
    border-radius:12px;
    font-weight:600;
}

/*  HERO IMAGE  */
.hero-image{
    flex:1;
    display:flex;
    justify-content:center;
    align-items:center;
    position:relative;
}

.hero-image img{
    width:100%;
    max-width:460px;
    position:relative;
    z-index:10;
}

/* circle background */
.circle.big{
    position:absolute;
    width:400px;
    height:400px;

    background:radial-gradient(
        circle,
        rgba(96,165,250,.45) 0%,
        rgba(147,197,253,.25) 45%,
        rgba(219,234,254,.1) 70%,
        transparent 100%
    );

    left:50%;
    top:50%;
    transform:translate(-50%,-50%);
    z-index:1;
}

/*  FEATURES  */
.features{
    max-width:1200px;
    margin:auto;
    padding:20px;

    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:20px;
}

.feature-card{
    background:white;
    border:1px solid #dbeafe;
    border-radius:16px;
    padding:18px;

    display:flex;
    gap:15px;
    align-items:center;

    box-shadow:0 5px 20px rgba(0,0,0,.05);
}

.icon{
    width:45px;
    height:45px;
    background:#eff6ff;
    border-radius:50%;

    display:flex;
    justify-content:center;
    align-items:center;
    font-size:20px;
}

/*  GRID  */
.grid{
    display:grid;
    grid-template-columns:1.1fr .9fr;
    gap:25px;
    margin-top:30px;
    align-items:start;
}

.card{
    background:white;
    border-radius:18px;
    padding:25px;
    box-shadow:0 8px 20px rgba(0,0,0,.05);
    border:1px solid #eef2ff;
}

/* ================= FORM ================= */
form{
    display:flex;
    flex-direction:column;
    gap:15px;
}

.card label{
    font-weight:600;
    color:#374151;
}

input,
select{
    padding:13px;
    border:1px solid #d1d5db;
    border-radius:12px;
    outline:none;
}

input:focus,
select:focus{
    border-color:#2563eb;
    box-shadow:0 0 0 3px rgba(37,99,235,.15);
}

button{
    background:#2563eb;
    color:white;
    border:none;
    padding:15px;
    border-radius:12px;
    cursor:pointer;
    font-size:15px;
    font-weight:600;
}

button:hover{
    background:#1d4ed8;
}

/* ================= PRICE RESULT ================= */
.price{
    font-size:40px;
    font-weight:700;
    color:#16a34a;
    text-align:center;
    margin-top:15px;
}

/* ================= SHAP ================= */
.shap-card{
    margin-top:25px;
}

.shap-image{
    width:100%;
    border-radius:12px;
    border:1px solid #e5e7eb;
}

/* ================= INSIGHT TEXT ================= */
.insight-text{
    font-size:14px;
    color:#4b5563;
    line-height:1.6;
    margin-top:12px;
    text-align:left;
}

/* ================= ARTIKEL ================= */
.artikel{
    width:100%;
    max-width:1200px;
    margin:40px auto;
    padding:20px;
}

.artikel h1{
    text-align:center;
    font-size:38px;
    margin-bottom:10px;
}

.artikel .subtitle{
    text-align:center;
    color:#6b7280;
    margin-bottom:40px;
}

.artikel-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(330px,1fr));
    gap:30px;
}

.artikel-card{
    background:#fff;
    border-radius:18px;
    overflow:hidden;
    box-shadow:0 8px 20px rgba(0,0,0,.08);
    transition:.3s;
}

.artikel-card:hover{
    transform:translateY(-8px);
}

.artikel-card img{
    width:100%;
    height:220px;
    object-fit:cover;
}

.artikel-content{
    padding:20px;
}

.artikel-btn{
    display:inline-block;
    margin-top:20px;
    padding:10px 18px;
    background:#2563eb;
    color:#fff;
    text-decoration:none;
    border-radius:10px;
    font-weight:600;
}

/* ================= ABOUT ================= */

.about{
    max-width:1200px;
    margin:auto;
    padding:80px 20px;
}

.about-wrapper{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:80px;
}

.about-text{
    flex:1;
}

.tag{
    display:inline-block;
    background:#dbeafe;
    color:#2563eb;
    padding:8px 18px;
    border-radius:30px;
    font-weight:600;
    margin-bottom:15px;
}

.about-text h1{
    font-size:58px;
    font-weight:800;
    margin-bottom:25px;

    background:linear-gradient(
        90deg,
        #1d4ed8,
        #3b82f6,
        #60a5fa
    );

    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;
}

.about-text p{
    font-size:18px;
    line-height:1.9;
    color:#475569;
    margin-bottom:20px;
}

.about-image{
    flex:1;
    text-align:center;
}

.about-image img{
    width:100%;
    max-width:500px;
}

.about-stats{
    margin-top:35px;
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:14px;
}

.stat-box{
    background:white;
    border-radius:16px;
    padding:18px 12px;
    text-align:center;
    box-shadow:0 6px 18px rgba(0,0,0,.07);
    border:1px solid #e5e7eb;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    min-height:90px;
}

.stat-box h2{
    color:#2563eb;
    margin-bottom:6px;
    font-size:20px;
    font-weight:800;
    line-height:1.2;
    word-break:break-word;
}

.stat-box p{
    font-size:13px;
    color:#6b7280;
    margin:0;
    line-height:1.4;
}

/* ================= FOOTER ================= */
footer{
    background:#14367d;
    color:white;
    margin-top:60px;
}

.footer-content{
    max-width:1200px;
    margin:auto;
    padding:50px 20px;

    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:40px;
}

.footer-section h3{
    margin-bottom:15px;
    font-size:20px;
}

.footer-section p,
.footer-section li{
    font-size:14px;
    line-height:1.8;
}

.footer-section ul{
    list-style:none;
    padding:0;
    margin:0;
}

.footer-section a{
    color:white;
    text-decoration:none;
}

.footer-section a:hover{
    text-decoration:underline;
}

.footer-bottom{
    border-top:1px solid rgba(255,255,255,.2);
    text-align:center;
    padding:20px;
    font-size:14px;
}

/* ================= SHAP CONTRIBUTION TABLE ================= */
.shap-contrib{
    width:100%;
    border-collapse:collapse;
    margin-top:18px;
    font-size:14px;
}

.shap-contrib td{
    padding:9px 12px;
    border-bottom:1px solid #f0f0f0;
}

.shap-contrib td:last-child{
    text-align:right;
    font-weight:600;
    white-space:nowrap;
}

.contrib-base td{
    background:#f8fafc;
    color:#374151;
    font-weight:600;
}

.contrib-row.positive td:last-child{
    color:#ef4444;
}

.contrib-row.negative td:last-child{
    color:#3b82f6;
}

.contrib-final td{
    background:#f0fdf4;
    color:#15803d;
    font-weight:700;
    font-size:15px;
    border-top:2px solid #bbf7d0;
    border-bottom:none;
}

/* ================= RESPONSIVE ================= */
@media(max-width:900px){

.hero{
    flex-direction:column;
    text-align:center;
}

.features{
    grid-template-columns:1fr 1fr;
}

.grid{
    grid-template-columns:1fr;
}

.about-wrapper{
    flex-direction:column;
    text-align:center;
}

.footer-content{
    grid-template-columns:1fr;
}

.navbar{
    flex-direction:column;
    gap:15px;
}

.nav-links{
    flex-wrap:wrap;
    justify-content:center;
}
}

@media(max-width:768px){

.features{
    grid-template-columns:1fr;
}

.hero-text h1{
    font-size:36px;
}

.artikel h1{
    font-size:30px;
}

}


select{
    appearance:auto !important;
    -webkit-appearance:menulist !important;
    -moz-appearance:menulist !important;

    background:#fff !important;
    color:#000 !important;

    min-height:48px;
}

select option{
    color:#000 !important;
    background:#fff !important;
}