:root {
    /* Headings responsive ตาม Bootstrap 5 ใช้ px + offset */
    --fs-h1: clamp(36px, 2.5vw + 24px, 80px);
    --fs-h2: clamp(30px, 2vw + 20px, 64px);
    --fs-h3: clamp(26px, 1.5vw + 20px, 52px);
    --fs-h4: clamp(23px, 1.2vw + 18px, 35px);
    --fs-h5: clamp(18px, 1vw + 16px, 30px);
    --fs-h6: clamp(16px, 0.8vw + 14px, 25px);
    --fs-p: clamp(14px, 0.5vw + 14px, 18px);
    --fs-small: clamp(12px, 0.25vw + 12px, 14px);
}

body {
    position: relative;
    font-family: "Kanit", sans-serif;
    background: url("https://img.gnjoy.in.th/2025/13/ragnarok_stars2025/bg_main.pngbg_main.png");
    background-position: top;
    background-size: cover;
    color: #fff;

    width: 100%;
}

/* ==== font ==== */

h1,
.h1 {
    font-size: var(--fs-h1);
}

h2,
.h2 {
    font-size: var(--fs-h2);
}

h3,
.h3 {
    font-size: var(--fs-h3);
}

h4,
.h4 {
    font-size: var(--fs-h4);
}

h5,
.h5 {
    font-size: var(--fs-h5);
}

h6,
.h6 {
    font-size: var(--fs-h6);
}

p,
.p {
    font-size: var(--fs-p);
}

small,
.small {
    font-size: var(--fs-small);
}

.ci-primary {
    color: #ffe8b0;
}

/* ==== button ==== */
.btnRos {
    width: 260px;
    height: 90px;
    padding: 5px 35px;
    border: 0px solid transparent;
    font-family: "Kanit", sans-serif !important;
}

.btnRos.primary {
    background: url("../images/btn.png");
    background-position: center;
    background-size: cover;
    filter: drop-shadow(1px 3px 1px #000000e1);
    color: #84510a;
    border: 0px solid;

    transition: all .5s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    line-height: 20px;
    font-weight: 800;
}

.btnRos.primary:hover {
    filter: drop-shadow(1px 2px 10px #ffc354);
}