* { margin: 0; padding: 0; box-sizing: border-box; }
html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}
img, svg { max-width: 100%; height: auto; }
body {
    background:
        radial-gradient(circle at 12% 18%, rgba(224,168,0,.18), transparent 28%),
        linear-gradient(165deg, #071828 0%, #0f2a44 48%, #12324f 100%);
    color: #0f2a44;
    font-family: "Kanit", "Segoe UI", Tahoma, sans-serif;
    line-height: 1.7;
    overflow-x: hidden;
    overscroll-behavior-y: contain;
}
.site-shell {
    width: 100%; max-width: 720px; margin: 0 auto;
    min-height: 100vh; min-height: 100dvh;
    background: #f4efe4;
    border-left: 1px solid rgba(198,40,40,.25);
    border-right: 1px solid rgba(198,40,40,.25);
    padding-bottom: env(safe-area-inset-bottom, 0px);
    overflow-x: hidden;
}
.page-header {
    padding: calc(16px + env(safe-area-inset-top, 0px)) 16px 12px;
    border-bottom: 2px dashed rgba(198,40,40,.35);
    background: linear-gradient(135deg, #0f2a44, #1a3d5c);
    color: #fff;
}
.back-link {
    display: inline-block; color: #ffe082; text-decoration: none;
    font-size: 14px; margin-bottom: 12px; min-height: 44px; line-height: 44px;
    -webkit-tap-highlight-color: transparent; touch-action: manipulation;
}
.page-header h1 { color: #ffe082; font-size: clamp(1.25rem, 5vw, 1.55rem); line-height: 1.35; margin-bottom: 8px; }
.hero-lead { color: #cfd8dc; font-size: 0.98rem; }
.hero-lead a { color: #ffe082; font-weight: 700; text-decoration: none; }
main { padding: 8px 0 28px; }
.section { padding: 16px; }
.section h2 {
    color: #0f2a44; font-size: clamp(1.05rem, 4.2vw, 1.15rem); margin: 18px 0 8px;
    border-left: 4px solid #c62828; padding-left: 10px;
}
.section h3 { color: #c62828; font-size: 1.02rem; margin: 14px 0 6px; }
.section p, .section li { color: #455a64; font-size: 0.98rem; margin-bottom: 10px; overflow-wrap: anywhere; }
.section ul, .section ol { padding-left: 1.2rem; margin-bottom: 12px; }
.section a { color: #c62828; font-weight: 700; text-decoration: none; }
.related-links { list-style: none; padding-left: 0; }
.related-links li { margin-bottom: 8px; }
.related-links a {
    display: block; padding: 12px; border-radius: 10px; min-height: 44px;
    border: 1.5px solid rgba(15,42,68,.12); background: #fff; border-left: 3px solid #e0a800;
    -webkit-tap-highlight-color: transparent; touch-action: manipulation;
}
.cta-row { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }
.btn {
    display: block; text-align: center; text-decoration: none !important; font-weight: 800;
    border-radius: 16px 6px 16px 6px; padding: 14px 16px; color: #fff !important;
    min-height: 48px; -webkit-tap-highlight-color: transparent; touch-action: manipulation;
    user-select: none; -webkit-user-select: none;
}
.btn:active { transform: scale(.98); }
.btn-primary {
    background: linear-gradient(135deg, #ff7043, #c62828 45%, #8e0000);
    border: 2px dashed #ffe082;
}
.btn-line {
    background: linear-gradient(135deg, #26a69a, #00897b 50%, #004d40);
    border: 2px solid #b2dfdb;
}
.site-footer {
    padding: 16px; text-align: center; border-top: 2px dashed rgba(198,40,40,.3);
    color: #607d8b; font-size: 0.9rem; background: #fff;
}
.site-footer a { color: #c62828; }
.breadcrumb { font-size: 0.85rem; color: #90a4ae; margin-bottom: 10px; }
.breadcrumb a { color: #ffe082; text-decoration: none; }

@media (max-width: 380px) {
    .page-header { padding-left: 12px; padding-right: 12px; }
    .section { padding: 14px 12px; }
}
@media (prefers-reduced-motion: reduce) {
    .btn:active { transform: none; }
}