*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Arial,Helvetica,sans-serif;background:#f7f8fc;color:#222}
body{padding-bottom:70px}
header{height:70px;background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 18px;box-shadow:0 3px 15px rgba(0,0,0,.10);position:sticky;top:0;z-index:900}
.header-left{display:flex;align-items:center;gap:10px}
.logo{color:#ff2d8d;text-decoration:none;font-weight:800;font-size:21px}
.logo small{display:block;color:#777;font-size:11px;font-weight:400}
.back{background:linear-gradient(135deg,#ff2d8d,#7c4dff);color:#fff;padding:10px 15px;border-radius:24px;text-decoration:none;font-weight:bold}
.menu-btn{width:44px;height:44px;border:0;border-radius:13px;background:linear-gradient(135deg,#ff2d8d,#7c4dff);color:#fff;font-size:24px;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 5px 15px rgba(124,77,255,.25)}
main{max-width:1200px;margin:auto;padding:24px 15px}
.hero{background:linear-gradient(135deg,#ff2d8d,#7c4dff);color:#fff;padding:25px;border-radius:22px;margin-bottom:22px}
.hero h1{margin:0 0 6px;font-size:30px}.hero p{margin:0}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:#fff;border-radius:18px;overflow:hidden;text-decoration:none;color:#222;box-shadow:0 6px 20px rgba(0,0,0,.10);transition:.2s}
.card:hover{transform:translateY(-4px)}
.cover{height:210px;background:linear-gradient(135deg,#ff2d8d,#7c4dff);display:flex;align-items:center;justify-content:center;overflow:hidden}
.cover img{width:100%;height:100%;object-fit:cover;display:block}.folder{font-size:55px}
.info{padding:14px}.info b{font-size:16px}.info span{display:block;color:#777;font-size:12px;margin-top:5px}
.empty{background:#fff;padding:45px;text-align:center;border-radius:18px;color:#777}
.sidebar-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:1000;opacity:0;visibility:hidden;transition:.25s}
.sidebar-overlay.open{opacity:1;visibility:visible}
.sidebar{position:fixed;top:0;left:0;width:300px;max-width:86%;height:100vh;background:#fff;z-index:1001;transform:translateX(-105%);transition:.28s ease;box-shadow:8px 0 30px rgba(0,0,0,.18);overflow-y:auto}
.sidebar.open{transform:translateX(0)}
.sidebar-head{position:relative;padding:22px 18px;background:linear-gradient(135deg,#ff2d8d,#7c4dff);color:#fff}
.sidebar-head .brand{font-size:23px;font-weight:800}.sidebar-head small{display:block;margin-top:3px;opacity:.9}
.sidebar-close{position:absolute;top:15px;right:15px;width:38px;height:38px;border:0;border-radius:50%;background:rgba(255,255,255,.2);color:#fff;font-size:22px;cursor:pointer}
.sidebar-menu{padding:12px 10px 25px}
.sidebar-menu a{display:flex;align-items:center;gap:13px;padding:14px 13px;margin:4px 0;border-radius:13px;text-decoration:none;color:#252525;font-weight:600;font-size:15px;transition:.18s}
.sidebar-menu a:hover{background:#fff0f7;color:#ff2d8d}
.menu-icon{width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;background:#f4f1ff;font-size:19px;flex:none}
.sidebar-divider{height:1px;background:#eee;margin:10px 7px}
nav{display:none}
@media(max-width:1000px){.grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:700px){
 header{height:62px;padding:0 10px}.logo{font-size:17px}.grid{grid-template-columns:repeat(2,1fr);gap:10px}
 .cover{height:155px}.info{padding:10px}.info b{font-size:14px}.hero{padding:19px}.hero h1{font-size:23px}
 .back{padding:8px 11px;font-size:12px}
 nav{display:flex;position:fixed;bottom:0;left:0;right:0;height:65px;background:#fff;border-top:1px solid #ddd;z-index:10}
 nav a{flex:1;text-align:center;padding-top:10px;color:#666;text-decoration:none;font-size:11px}
 nav .active{color:#ff2d8d;font-weight:bold}nav span{display:block;margin-top:3px}
}
@media(max-width:420px){
 .header-left{gap:7px}.menu-btn{width:40px;height:40px;font-size:21px}.logo{font-size:16px}
 .back{font-size:11px;padding:8px 9px}.grid{gap:8px}.cover{height:135px}
 .sidebar{width:285px}
}


/* ================= SIDEBAR MENU: DESKTOP + MOBILE ================= */

.menu-btn{
    display:flex !important;
    flex:none;
}

.sidebar-menu{
    display:block !important;
}

@media(min-width:701px){
    .menu-btn{
        width:46px;
        height:46px;
    }

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

@media(max-width:700px){
    .header-left{
        display:flex;
        align-items:center;
        gap:8px;
    }
}