:root{
    --primary:#2563eb;
    --primary-light:#4f8cff;
    --secondary:#06b6d4;
    --success:#16a34a;
    --danger:#ef4444;
    --warning:#f59e0b;

    --bg:#f4f8fc;
    --card:#ffffff;
    --text:#1f2937;
    --text-light:#6b7280;
    --border:#e5e7eb;

    --shadow:0 15px 40px rgba(15,23,42,.08);
    --radius:20px;
}

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

html{
    scroll-behavior:smooth;
}

body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.8;
}

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

.hero{
    background:
        radial-gradient(circle at top right,rgba(255,255,255,.15),transparent 40%),
        linear-gradient(135deg,#2563eb,#06b6d4);
    color:#fff;
    text-align:center;
    padding:80px 20px;
}

.hero h1{
    font-size:46px;
    font-weight:700;
    margin-bottom:10px;
    letter-spacing:-1px;
}

.hero p{
    font-size:18px;
    opacity:.95;
}

.hero strong{
    color:#fff;
}

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

.container{
    max-width:960px;
    margin:-45px auto 60px;
    padding:0 20px;
}

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

.card{
    background:var(--card);
    border-radius:var(--radius);
    padding:50px;
    box-shadow:var(--shadow);
}

/* ================= TITLES ================= */

h2{
    color:var(--primary);
    margin-top:45px;
    margin-bottom:18px;
    font-size:26px;
    position:relative;
    padding-left:18px;
}

h2:first-child{
    margin-top:0;
}

h2::before{
    content:"";
    position:absolute;
    left:0;
    top:5px;
    width:6px;
    height:28px;
    border-radius:30px;
    background:linear-gradient(var(--primary),var(--secondary));
}

/* ================= TEXT ================= */

p{
    margin-bottom:18px;
    color:var(--text-light);
    font-size:16px;
}

/* ================= LIST ================= */

ul{
    margin:18px 0 20px 20px;
}

li{
    margin-bottom:12px;
    color:var(--text-light);
}

/* ================= HIGHLIGHT ================= */

.highlight{
    background:#f0f8ff;
    border-left:5px solid var(--primary);
    border-radius:14px;
    padding:24px;
    margin:20px 0;
}

.highlight p{
    margin-bottom:12px;
}

/* ================= LINKS ================= */

a{
    color:var(--primary);
    text-decoration:none;
    font-weight:600;
}

a:hover{
    text-decoration:underline;
}

/* ================= TABLE STYLE (nếu có) ================= */

table{
    width:100%;
    border-collapse:collapse;
    margin:20px 0;
}

th,td{
    padding:14px;
    border:1px solid var(--border);
}

th{
    background:#f8fbff;
}

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

.footer{
    text-align:center;
    color:#94a3b8;
    padding:35px 20px;
    font-size:14px;
}

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

.card h2:not(:first-child){
    border-top:1px solid var(--border);
    padding-top:35px;
}

/* ================= NICE LIST ICON ================= */

ul li::marker{
    color:var(--secondary);
}

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

@media(max-width:768px){

.hero{
    padding:60px 20px;
}

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

.hero p{
    font-size:16px;
}

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

.card{
    padding:28px;
}

h2{
    font-size:22px;
}

}

/* ================= CONTACT ================= */

.contact{
    background:#f8fbff;
    padding:20px;
    border-radius:14px;
    border:1px solid #dbeafe;
}

/* ================= POLICY BOX ================= */

.policy-box{
    background:#ffffff;
    border:1px solid var(--border);
    border-radius:14px;
    padding:20px;
    margin:18px 0;
}

/* ================= BADGE ================= */

.badge{
    display:inline-block;
    padding:6px 14px;
    border-radius:30px;
    background:#e0f2fe;
    color:#0369a1;
    font-size:13px;
    font-weight:600;
}

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

::-webkit-scrollbar{
    width:10px;
}

::-webkit-scrollbar-thumb{
    background:#cbd5e1;
    border-radius:20px;
}

::-webkit-scrollbar-thumb:hover{
    background:#94a3b8;
}