/* ==========================================
   RESET
========================================== */

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

html{
    scroll-behavior:smooth;
}

body{
    font-family:Arial, Helvetica, sans-serif;
    background:#f5f7fb;
    color:#222;
    line-height:1.6;
}

a{
    text-decoration:none;
    color:inherit;
}

img{
    width:100%;
    display:block;
}

button{
    cursor:pointer;
    border:none;
    outline:none;
}

input{
    outline:none;
}

/* ==========================================
   CONTAINER
========================================== */

.container{
    width:95%;
    max-width:1200px;
    margin:auto;
}

/* ==========================================
   HEADER
========================================== */

.header{
    position:sticky;
    top:0;
    z-index:999;
    background:#ffffff;
    box-shadow:0 2px 10px rgba(0,0,0,.08);
}

.header .container{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:15px;
    padding:15px 0;
}

/* ==========================================
   LOGO
========================================== */

.logo img{
    height:80px;
    width:auto;
    display:block;
}
/* ==========================================
   SEARCH BOX
========================================== */

.search-box{
    display:flex;
    flex:1;
    max-width:500px;
}

.search-box input{
    flex:1;
    padding:12px 15px;
    border:1px solid #ddd;
    border-right:none;
    border-radius:8px 0 0 8px;
    font-size:15px;
}

.search-box input:focus{
    border-color:#2563eb;
}

.search-box button{
    background:#2563eb;
    color:#fff;
    padding:0 20px;
    border-radius:0 8px 8px 0;
    font-weight:bold;
    transition:.3s;
}

.search-box button:hover{
    background:#1d4ed8;
}

/* ==========================================
   HERO
========================================== */

.hero{
    background:linear-gradient(135deg,#2563eb,#1e40af);
    color:#fff;
    text-align:center;
    padding:60px 20px;
}

.hero h1{
    font-size:34px;
    margin-bottom:15px;
}

.hero p{
    max-width:700px;
    margin:auto;
    font-size:16px;
    opacity:.95;
    line-height:1.8;
}

/* ==========================================
   RESPONSIVE HEADER
========================================== */

@media(max-width:768px){

    .header .container{
        flex-direction:column;
        align-items:stretch;
    }

    .logo{
        text-align:center;
        font-size:26px;
    }

    .search-box{
        max-width:100%;
    }

    .hero{
        padding:45px 15px;
    }

    .hero h1{
        font-size:28px;
    }

    .hero p{
        font-size:15px;
    }

}

/* ==========================================
   CATEGORY
========================================== */

.category-list{
    display:flex;
    gap:10px;
    overflow-x:auto;
    padding:5px 0;
}

.category-list::-webkit-scrollbar{
    display:none;
}

.category-btn{
    white-space:nowrap;
    padding:10px 18px;
    border-radius:999px;
    border:1px solid #2563eb;
    background:#fff;
    color:#2563eb;
    font-weight:600;
    cursor:pointer;
}

.category-btn:hover,
.category-btn.active{
    background:#2563eb;
    color:#fff;
}

/* ==========================================
   EBOOK
========================================== */

.ebooks{
    padding:35px 0;
}

.ebooks h2{
    font-size:24px;
    margin-bottom:20px;
}

/* ==========================================
   GRID
========================================== */

.ebook-grid{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:14px;
}

/* ==========================================
   CARD
========================================== */

.ebook-card{
    background:#ffffff;
    border-radius:12px;
    overflow:hidden;
    box-shadow:0 3px 10px rgba(0,0,0,.08);
    transition:.3s;
}

.ebook-card:hover{
    transform:translateY(-4px);
    box-shadow:0 8px 20px rgba(0,0,0,.12);
}

.ebook-card img{
    width:100%;
    aspect-ratio:3/4;
    object-fit:cover;
}

/* ==========================================
   CARD CONTENT
========================================== */

.ebook-card h3{
    font-size:15px;
    font-weight:700;
    padding:10px 10px 4px;
    line-height:1.4;
    height:50px;
    overflow:hidden;
}

.ebook-card p{
    padding:0 10px;
    font-size:12px;
    color:#666;
}

/* ==========================================
   DOWNLOAD INFO
========================================== */

.ebook-info{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:8px 10px;
    font-size:12px;
    color:#777;
}

.ebook-info span{
    display:flex;
    align-items:center;
    gap:4px;
}

/* ==========================================
   BUTTON
========================================== */

.ebook-card a{
    display:block;
    margin:10px;
    padding:10px;
    background:#2563eb;
    color:#ffffff;
    text-align:center;
    border-radius:8px;
    font-size:13px;
    font-weight:bold;
    transition:.3s;
}

.ebook-card a:hover{
    background:#1d4ed8;
}

.guide-btn{
    width:100%;
    padding:15px;
    margin-bottom:15px;
    border:none;
    border-radius:12px;
    background:#2563eb;
    color:#fff;
    font-size:16px;
    font-weight:600;
    cursor:pointer;
}
/* ==========================================
   DESKTOP
========================================== */

@media(min-width:768px){

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

}

@media(min-width:1200px){

    .ebook-grid{
        grid-template-columns:repeat(5,1fr);
    }

}

/* ==========================================
   FOOTER
========================================== */

footer{
    background:#111827;
    color:#ffffff;
    margin-top:50px;
}

footer .container{
    padding:30px 0;
    text-align:center;
}

footer p{
    font-size:14px;
    color:#d1d5db;
}

footer a{
    color:#60a5fa;
}

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

/* ==========================================
   SECTION
========================================== */

section{
    padding:40px 0;
}

h2{
    font-size:24px;
    margin-bottom:20px;
    color:#111827;
}

/* ==========================================
   UTILITIES
========================================== */

.text-center{
    text-align:center;
}

.mt-10{
    margin-top:10px;
}

.mt-20{
    margin-top:20px;
}

.mt-30{
    margin-top:30px;
}

.mb-10{
    margin-bottom:10px;
}

.mb-20{
    margin-bottom:20px;
}

.mb-30{
    margin-bottom:30px;
}

/* ==========================================
   SCROLLBAR
========================================== */

::-webkit-scrollbar{
    width:8px;
}

::-webkit-scrollbar-track{
    background:#f1f1f1;
}

::-webkit-scrollbar-thumb{
    background:#2563eb;
    border-radius:20px;
}

::-webkit-scrollbar-thumb:hover{
    background:#1d4ed8;
}

/* ==========================================
   ANIMATION
========================================== */

@keyframes fadeUp{

    from{
        opacity:0;
        transform:translateY(20px);
    }

    to{
        opacity:1;
        transform:translateY(0);
    }

}

.ebook-card{
    animation:fadeUp .4s ease;
}

/* ==========================================
   MOBILE
========================================== */

@media(max-width:768px){

    .container{
        width:94%;
    }

    h2{
        font-size:20px;
    }

    footer .container{
        padding:25px 0;
    }

}

/* ==========================================
   TABLET
========================================== */

@media(min-width:769px) and (max-width:1024px){

    .container{
        width:92%;
    }

}

/* ==========================================
   DESKTOP
========================================== */

@media(min-width:1200px){

    .container{
        max-width:1280px;
    }

}

/* ==========================================
   DETAIL EBOOK
========================================== */

.detail{
    padding:40px 0;
}

.detail-box{
    display:grid;
    grid-template-columns:320px 1fr;
    gap:30px;
    background:#fff;
    border-radius:16px;
    padding:25px;
    box-shadow:0 5px 15px rgba(0,0,0,.08);
}

.detail-cover img{
    width:100%;
    border-radius:12px;
    aspect-ratio:3/4;
    object-fit:cover;
}

.detail-content h1{
    font-size:30px;
    margin-bottom:15px;
    color:#111827;
}

/* ==========================================
   META
========================================== */

.ebook-meta{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    margin-bottom:20px;
}

.ebook-meta span{
    background:#eef4ff;
    color:#2563eb;
    padding:8px 14px;
    border-radius:30px;
    font-size:14px;
    font-weight:600;
}

/* ==========================================
   DESKRIPSI
========================================== */

.detail-content h3{
    margin-bottom:10px;
    font-size:22px;
}

.detail-content p{
    margin-bottom:12px;
    color:#555;
    line-height:1.8;
}

/* ==========================================
   BANNER IKLAN
========================================== */

.ads{
    margin:25px 0;
}

.ads img{
    width:100%;
    border-radius:10px;
}

/* ==========================================
   DOWNLOAD BUTTON
========================================== */

.download-btn{
    display:inline-block;
    background:#16a34a;
    color:#fff;
    padding:14px 28px;
    border-radius:10px;
    font-size:16px;
    font-weight:bold;
    transition:.3s;
}

.download-btn:hover{
    background:#15803d;
    transform:translateY(-2px);
}

.download-info{
    background:#eef6ff;
    border-left:5px solid #2563eb;
    padding:18px;
    border-radius:12px;
    margin:20px 0;
}

.download-info h3{
    margin-bottom:10px;
    color:#2563eb;
}

.download-info ol{
    margin-left:20px;
}

.download-info li{
    margin:8px 0;
    line-height:1.6;
}

.download-status{
    margin:15px 0;
    padding:12px;
    text-align:center;
    background:#fff8e1;
    color:#b45309;
    border-radius:10px;
    font-weight:600;
}
/* ==========================================
   RESPONSIVE
========================================== */

@media(max-width:768px){

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

    .detail-cover{
        max-width:260px;
        margin:auto;
    }

    .detail-content h1{
        font-size:24px;
    }

    .ebook-meta{
        gap:8px;
    }

    .ebook-meta span{
        font-size:13px;
        padding:7px 12px;
    }

    .download-btn{
        display:block;
        text-align:center;
        width:100%;
    }

}

/* ==========================================
   DOWNLOAD PAGE
========================================== */

.download-page{
    padding:40px 0;
}

.download-box{
    max-width:800px;
    margin:auto;
    background:#ffffff;
    border-radius:16px;
    padding:30px;
    box-shadow:0 5px 20px rgba(0,0,0,.08);
}

.download-box h1{
    text-align:center;
    margin-bottom:10px;
    color:#111827;
}

.download-box>p{
    text-align:center;
    color:#666;
    margin-bottom:25px;
}

/* ==========================================
   FILE INFO
========================================== */

.file-info{
    background:#f8fafc;
    border:1px solid #e5e7eb;
    border-radius:12px;
    padding:18px;
    margin-bottom:25px;
}

.file-info p{
    margin:10px 0;
    color:#374151;
}

.file-info b{
    color:#111827;
}

/* ==========================================
   ADS
========================================== */

.ads{
    margin:25px 0;
}

.ads img{
    width:100%;
    border-radius:12px;
}

/* ==========================================
   COUNTDOWN
========================================== */

.countdown-box{
    text-align:center;
    margin:30px 0;
}

.countdown-box p{
    margin-bottom:10px;
    color:#555;
}

.countdown-box h2{
    width:120px;
    height:120px;
    margin:auto;
    border-radius:50%;
    background:#2563eb;
    color:#ffffff;
    display:flex;
    justify-content:center;
    align-items:center;
    font-size:42px;
    font-weight:bold;
}

/* ==========================================
   DOWNLOAD BUTTON
========================================== */

.download-btn{
    display:block;
    width:100%;
    padding:16px;
    text-align:center;
    background:#16a34a;
    color:#fff;
    border-radius:12px;
    font-size:18px;
    font-weight:bold;
    transition:0.3s;
}

.download-btn.disabled{
    background:#9ca3af;
    cursor:not-allowed;
}

/* ==========================================
   RESPONSIVE
========================================== */

@media(max-width:768px){

    .download-box{
        padding:20px;
    }

    .countdown-box h2{
        width:90px;
        height:90px;
        font-size:34px;
    }

    .download-btn{
        font-size:16px;
    }

}

/* ========================
SCROLL
===========================*/

.scroll-top-btn{
    position:fixed;
    right:20px;
    bottom:20px;
    width:50px;
    height:50px;
    border:none;
    border-radius:50%;
    background:#2563eb;
    color:#fff;
    font-size:22px;
    cursor:pointer;
    box-shadow:0 5px 15px rgba(0,0,0,.2);
    opacity:0;
    visibility:hidden;
    transform:translateY(20px);
    transition:.3s;
    z-index:999;
}

.scroll-top-btn.show{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
}

.scroll-top-btn:hover{
    background:#1d4ed8;
}

/* ===================
POP UP
====================== */

.download-popup{
    position:fixed;
    right:20px;
    bottom:20px;
    width:280px;

    background:#fff;
    border-radius:12px;
    box-shadow:0 8px 25px rgba(0,0,0,.15);

    display:flex;
    gap:10px;
    padding:10px;

    align-items:center;

    opacity:0;
    transform:translateY(30px);

    transition:.4s;

    z-index:9999;
}

.download-popup.show{
    opacity:1;
    transform:translateY(0);
}

.download-popup img{
    width:55px;
    height:75px;
    border-radius:8px;
    object-fit:cover;
}

.popup-content strong{
    display:block;
    color:#2563eb;
    font-size:14px;
}

.popup-content p{
    font-size:12px;
    color:#555;
    margin-top:4px;
  }