* { box-sizing: border-box }
html, body { height: 100% }
body {
    margin: 0;
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    color: #fff;
    background: url('images/bg.png') center center / cover no-repeat fixed;
    display: grid;
    place-items: center;
    padding: 24px;
}
body:lang(ko) {
    font-family: "Apple SD Gothic Neo", system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans KR', sans-serif;
}
.card {
    width: min(680px, calc(100vw - 48px));
    max-width: 680px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(12px) saturate(110%);
    -webkit-backdrop-filter: blur(12px) saturate(110%);
    border-radius: 28px;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.12),
        0 1px 0 rgba(255, 255, 255, 0.8) inset,
        0 -1px 0 rgba(255, 255, 255, 0.3) inset;
    border: 1px solid rgba(255, 255, 255, 0.4);
    padding: 32px;
    position: relative;
    overflow: hidden;
}
@media (prefers-color-scheme: dark) {
    .card {
        background: rgba(0, 0, 0, 0.25);
        border: 1px solid rgba(255, 255, 255, 0.1);
        box-shadow: 
            0 8px 32px rgba(0, 0, 0, 0.3),
            0 1px 0 rgba(255, 255, 255, 0.1) inset,
            0 -1px 0 rgba(255, 255, 255, 0.05) inset;
    }
}
header {
    margin-bottom: 24px;
}
h1 {
    font-size: clamp(24px, 4vw, 32px);
    margin: 0 0 8px 0;
    font-weight: 600;
    color: #fff;
    line-height: 1.2;
}
.support-page h1 {
    margin-bottom: 12px;
}
header p {
    margin: 0;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}
.support-page header p {
    color: rgba(255, 255, 255, 0.95);
}
header p:not(:last-child) {
    margin-bottom: 24px;
}
section {
    margin-bottom: 24px;
}
h2 {
    font-size: 20px;
    margin: 0 0 12px 0;
    font-weight: 600;
    color: #fff;
}
.support-page h2 {
    margin-bottom: 16px;
}
p {
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.95);
    margin: 0 0 16px 0;
}
ul {
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.95);
    margin: 0;
    padding-left: 24px;
}
li {
    margin-bottom: 12px;
}
a {
    color: rgba(255, 255, 255, 0.95);
    text-decoration: underline;
    text-decoration-color: rgba(255, 255, 255, 0.4);
    transition: text-decoration-color 0.2s ease;
}
a:hover {
    text-decoration-color: rgba(255, 255, 255, 0.8);
}
nav {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}
.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
}
.nav-links-left {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}
.nav-links a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease, text-decoration-color 0.2s ease;
}
.nav-links a:hover {
    color: rgba(255, 255, 255, 1);
    text-decoration: underline;
    text-decoration-color: rgba(255, 255, 255, 0.6);
}
.nav-links a.active {
    color: rgba(255, 255, 255, 1);
    font-weight: 600;
}
.nav-links a.active:hover {
    text-decoration: none;
}
.lang-switcher {
    display: flex;
    gap: 8px;
    align-items: center;
}
.lang-switcher span {
    color: rgba(255, 255, 255, 0.3);
    font-size: 12px;
}
.lang-switcher a:first-child {
    padding-right: 8px;
}
.lang-switcher a:last-child {
    padding-left: 8px;
}
footer {
    text-align: center;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}