:root {
    --sot-blue: #0d47a1;
    --sot-blue-light: #1565c0;
    --sot-blue-dark: #002171;
    --sot-accent: #29b6f6;
    --sot-bg: #f4f8fc;
    --sot-text: #1a2332;
    --sot-muted: #5c6b7a;
    --sot-border: #d8e3ef;
    --sot-radius: 12px;
    --sot-shadow: 0 8px 24px rgba(13, 71, 161, 0.08);
}

html,
body {
    max-width: 100%;
    overflow-x: hidden;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    color: var(--sot-text);
    background: var(--sot-bg);
    line-height: 1.6;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: #fff;
    padding: .5rem 1rem;
    z-index: 9999;
}
.skip-link:focus { left: 1rem; top: 1rem; }

.site-header {
    background: #fff;
    border-bottom: 1px solid var(--sot-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,.04);
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .75rem 1rem;
    max-width: 1140px;
    margin: 0 auto;
}
.brand {
    display: flex;
    align-items: center;
    gap: .5rem;
    text-decoration: none;
    color: var(--sot-text);
    font-weight: 700;
}
.brand-mark {
    background: linear-gradient(135deg, var(--sot-blue), var(--sot-accent));
    color: #fff;
    padding: .35rem .6rem;
    border-radius: 8px;
    font-size: .85rem;
}
.brand-text { font-size: 1rem; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: 0;
    padding: .5rem;
    cursor: pointer;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--sot-blue);
}

.site-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: .25rem 1rem;
}
.site-nav a {
    text-decoration: none;
    color: var(--sot-muted);
    font-size: .92rem;
    font-weight: 500;
    padding: .35rem 0;
    border-bottom: 2px solid transparent;
}
.site-nav a:hover,
.site-nav a.active {
    color: var(--sot-blue);
    border-bottom-color: var(--sot-accent);
}

.site-main { min-height: 60vh; }

.hero {
    background: linear-gradient(135deg, var(--sot-blue-dark) 0%, var(--sot-blue) 55%, var(--sot-blue-light) 100%);
    color: #fff;
    padding: 3rem 0 3.5rem;
}
.hero h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 700; margin-bottom: 1rem; }
.hero p { opacity: .92; max-width: 640px; }
.hero-actions { margin-top: 1.5rem; display: flex; flex-wrap: wrap; gap: .75rem; }

.btn-sot {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: .65rem 1.25rem;
    border-radius: 999px;
    font-weight: 600;
    text-decoration: none;
    border: 2px solid transparent;
    transition: .2s;
}
.btn-sot-primary { background: #fff; color: var(--sot-blue); }
.btn-sot-primary:hover { background: var(--sot-accent); color: #fff; }
.btn-sot-ghost { border-color: rgba(255,255,255,.5); color: #fff; }
.btn-sot-ghost:hover { background: rgba(255,255,255,.12); }
.btn-sot-outline { border-color: var(--sot-blue); color: var(--sot-blue); background: #fff; }
.btn-sot-outline:hover { background: var(--sot-blue); color: #fff; }

.section { padding: 2.5rem 0; }
.section-title { font-size: 1.5rem; font-weight: 700; margin-bottom: .5rem; }
.section-desc { color: var(--sot-muted); margin-bottom: 1.5rem; }

.flow-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}
.flow-step {
    background: #fff;
    border-radius: var(--sot-radius);
    padding: 1.25rem;
    text-align: center;
    box-shadow: var(--sot-shadow);
    position: relative;
}
.flow-step strong { display: block; color: var(--sot-blue); margin-bottom: .35rem; }

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}
.feature-card {
    background: #fff;
    border-radius: var(--sot-radius);
    padding: 1.25rem;
    box-shadow: var(--sot-shadow);
    border: 1px solid var(--sot-border);
}
.feature-card h3 { font-size: 1.05rem; margin-bottom: .5rem; color: var(--sot-blue); }

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}
.product-card {
    background: #fff;
    border-radius: var(--sot-radius);
    overflow: hidden;
    box-shadow: var(--sot-shadow);
    border: 1px solid var(--sot-border);
    display: flex;
    flex-direction: column;
}
.product-card-body { padding: 1.25rem; flex: 1; }
.product-price { font-size: 1.25rem; font-weight: 700; color: var(--sot-blue); }
.product-badge {
    display: inline-block;
    background: rgba(41, 182, 246, .15);
    color: var(--sot-blue-light);
    font-size: .75rem;
    padding: .2rem .55rem;
    border-radius: 999px;
    margin-bottom: .5rem;
}

.form-panel {
    background: #fff;
    border-radius: var(--sot-radius);
    padding: 1.5rem;
    box-shadow: var(--sot-shadow);
    border: 1px solid var(--sot-border);
    max-width: 640px;
    margin: 0 auto;
}
.form-panel .form-label { font-weight: 600; }

.result-box {
    background: #e3f2fd;
    border: 1px solid #90caf9;
    border-radius: var(--sot-radius);
    padding: 1rem 1.25rem;
    margin-top: 1rem;
}
.result-box dl { margin: 0; display: grid; grid-template-columns: 120px 1fr; gap: .35rem .75rem; }
.result-box dt { color: var(--sot-muted); font-weight: 500; }
.result-box dd { margin: 0; font-weight: 600; }

.ticket-card {
    max-width: 360px;
    margin: 1.5rem auto;
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--sot-shadow);
    border: 2px solid var(--sot-blue);
}
.ticket-card-head {
    background: var(--sot-blue);
    color: #fff;
    text-align: center;
    padding: 1rem;
    font-weight: 700;
    letter-spacing: .05em;
}
.ticket-card-body { padding: 1.25rem; text-align: center; }
.ticket-qr { margin: 1rem auto; width: 180px; height: 180px; }

.site-footer {
    background: var(--sot-blue-dark);
    color: rgba(255,255,255,.85);
    padding: 2rem 0 1.5rem;
    margin-top: 2rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1rem;
}
.site-footer strong { color: #fff; display: block; margin-bottom: .35rem; }
.site-footer .copy { margin: 1rem 0 0; font-size: .85rem; opacity: .7; text-align: center; }
.footer-brand-block { text-align: center; margin-bottom: 1rem; }
.footer-brand-name { font-size: 1.15rem; letter-spacing: .06em; display: inline !important; }
.footer-powered { display: block; font-size: .85rem; opacity: .85; margin-top: .25rem; font-weight: 500; }
.footer-contact-list { display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem 1.25rem; font-size: .88rem; margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid rgba(255,255,255,.15); }
.footer-contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem 1.5rem;
    margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,.15);
    font-size: .88rem;
}
.footer-contact-item { display: flex; flex-direction: column; gap: .2rem; }
.footer-contact-label { font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; opacity: .65; }
.footer-contact-item a { color: #90caf9; text-decoration: none; }
.footer-contact-item a:hover { text-decoration: underline; }
.footer-contact-address span { line-height: 1.5; }
.footer-contact-list a { color: #90caf9; text-decoration: none; }
.footer-contact-list a:hover { text-decoration: underline; }
.brand-sub { font-size: .72rem; opacity: .75; margin-left: .5rem; font-weight: 500; vertical-align: middle; }

.alert-sample { border-radius: var(--sot-radius); }

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .site-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--sot-border);
        padding: 1rem;
    }
    .site-nav.is-open { display: block; }
    .site-nav ul { flex-direction: column; gap: .5rem; }
    .site-header .container { position: relative; flex-wrap: wrap; }
    .result-box dl { grid-template-columns: 1fr; }
}