/*
|--------------------------------------------------------------------------
| TrungVu.Name.VN
|--------------------------------------------------------------------------
*/

:root{
    --primary:#2563eb;
    --primary-hover:#1d4ed8;
    --secondary:#0f172a;
    --card:#1e293b;
    --text:#f8fafc;
    --muted:#94a3b8;
    --border:#334155;
    --success:#22c55e;
    --radius:14px;
    --shadow:0 10px 30px rgba(0,0,0,.25);
    --container:1280px;
}

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

html{
    scroll-behavior:smooth;
}

body{
    font-family:
    Inter,
    Arial,
    Helvetica,
    sans-serif;
    background:var(--secondary);
    color:var(--text);
    line-height:1.7;
}

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

ul{
    list-style:none;
}

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

.container{
    width:100%;
    max-width:var(--container);
    margin:auto;
    padding:0 20px;
}

/* Header */

header{
    position:sticky;
    top:0;
    z-index:999;
    background:rgba(15,23,42,.95);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--border);
}

.header-wrap{
    height:70px;
    display:flex;
    align-items:center;
    justify-content:space-between;
}

.logo{
    font-size:24px;
    font-weight:700;
}

.logo span{
    color:var(--primary);
}

nav ul{
    display:flex;
    gap:25px;
}

nav a{
    color:#fff;
    transition:.3s;
}

nav a:hover{
    color:var(--primary);
}

/* Hero */

.hero{
    padding:120px 0;
    text-align:center;
}

.hero h1{
    font-size:60px;
    line-height:1.2;
    margin-bottom:20px;
}

.hero p{
    color:var(--muted);
    max-width:800px;
    margin:auto;
    margin-bottom:35px;
}

.hero-buttons{
    display:flex;
    gap:15px;
    justify-content:center;
    flex-wrap:wrap;
}

.btn{
    display:inline-block;
    padding:14px 28px;
    border-radius:10px;
    font-weight:600;
    transition:.3s;
}

.btn-primary{
    background:var(--primary);
    color:#fff;
}

.btn-primary:hover{
    background:var(--primary-hover);
}

.btn-outline{
    border:1px solid var(--border);
}

.btn-outline:hover{
    background:var(--card);
}

/* Sections */

.section{
    padding:80px 0;
}

.section-title{
    text-align:center;
    margin-bottom:50px;
}

.section-title h2{
    font-size:40px;
    margin-bottom:10px;
}

.section-title p{
    color:var(--muted);
}

/* Cards */

.grid{
    display:grid;
    gap:25px;
}

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

.grid-3{
    grid-template-columns:repeat(3,1fr);
}

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

.card{
    background:var(--card);
    border:1px solid var(--border);
    border-radius:var(--radius);
    overflow:hidden;
    transition:.3s;
}

.card:hover{
    transform:translateY(-6px);
    box-shadow:var(--shadow);
}

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

.card-content{
    padding:20px;
}

.card h3{
    margin-bottom:10px;
}

.card p{
    color:var(--muted);
}

/* Features */

.feature{
    text-align:center;
    padding:30px;
}

.feature-icon{
    width:70px;
    height:70px;
    margin:auto;
    margin-bottom:20px;
    border-radius:50%;
    background:rgba(37,99,235,.15);
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:28px;
}

/* Blog */

.posts{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:25px;
}

.post-card{
    background:var(--card);
    border-radius:var(--radius);
    overflow:hidden;
}

.post-content{
    padding:20px;
}

.post-meta{
    color:var(--muted);
    font-size:14px;
    margin-bottom:10px;
}

/* Sidebar */

.sidebar-widget{
    background:var(--card);
    padding:20px;
    border-radius:var(--radius);
    margin-bottom:20px;
}

.sidebar-widget h3{
    margin-bottom:15px;
}

/* Form */

.form-group{
    margin-bottom:20px;
}

input,
textarea,
select{
    width:100%;
    padding:14px;
    background:#0b1220;
    border:1px solid var(--border);
    border-radius:10px;
    color:#fff;
}

textarea{
    resize:vertical;
    min-height:140px;
}

button{
    cursor:pointer;
    border:none;
}

/* Table */

table{
    width:100%;
    border-collapse:collapse;
}

table th,
table td{
    padding:12px;
    border:1px solid var(--border);
}

/* Footer */

footer{
    margin-top:80px;
    border-top:1px solid var(--border);
}

.footer-top{
    padding:60px 0;
}

.footer-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:30px;
}

.footer-bottom{
    text-align:center;
    padding:20px;
    border-top:1px solid var(--border);
    color:var(--muted);
}

/* Search */

.search-box{
    display:flex;
    gap:10px;
}

.search-box input{
    flex:1;
}

/* Pagination */

.pagination{
    display:flex;
    justify-content:center;
    gap:10px;
    margin-top:40px;
}

.pagination a{
    padding:10px 15px;
    background:var(--card);
    border-radius:8px;
}

.pagination a.active{
    background:var(--primary);
}

/* Utilities */

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

.mt-1{margin-top:10px;}
.mt-2{margin-top:20px;}
.mt-3{margin-top:30px;}
.mt-4{margin-top:40px;}
.mt-5{margin-top:50px;}

.mb-1{margin-bottom:10px;}
.mb-2{margin-bottom:20px;}
.mb-3{margin-bottom:30px;}
.mb-4{margin-bottom:40px;}
.mb-5{margin-bottom:50px;}

/* Tablet */

@media(max-width:992px){

    .hero h1{
        font-size:46px;
    }

    .grid-4{
        grid-template-columns:repeat(2,1fr);
    }

    .grid-3{
        grid-template-columns:repeat(2,1fr);
    }

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

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

}

/* Mobile */

@media(max-width:768px){

    .header-wrap{
        flex-direction:column;
        height:auto;
        padding:15px 0;
    }

    nav ul{
        flex-wrap:wrap;
        justify-content:center;
        margin-top:15px;
    }

    .hero{
        padding:80px 0;
    }

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

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

    .grid-2,
    .grid-3,
    .grid-4,
    .posts,
    .footer-grid{
        grid-template-columns:1fr;
    }

    .section-title h2{
        font-size:28px;
    }

}

/* Small Mobile */

@media(max-width:480px){

    .container{
        padding:0 15px;
    }

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

    .logo{
        font-size:20px;
    }

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

}