.standards-page-shell { background: #f8fafc; color: #1e293b; }
.standards-hero { background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #3157D5 100%); color: #fff; }
.eyebrow { font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 800; color: #93c5fd; }
.standards-hero h1 { font-size: clamp(2.4rem, 4vw, 4rem); font-weight: 800; color: #fff; }
.standards-hero .lead { max-width: 760px; color: rgba(255,255,255,0.9); font-size: 1.18rem; }
.standards-badge-bar { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem; }
.std-chip { background: rgba(255,255,255,0.12); color: #fff; border: 1px solid rgba(255,255,255,0.2); padding: 0.4rem 1rem; border-radius: 999px; font-weight: 700; font-size: 0.88rem; }
.std-chip.primary { background: rgba(59, 130, 246, 0.25); border-color: #60a5fa; }
.tax-card { background: #fff; border: 1px solid #e2e8f0; border-radius: 16px; box-shadow: 0 10px 30px rgba(0,0,0,0.05); overflow: hidden; }
.tax-header { padding: 1.2rem 1.5rem; border-bottom: 1px solid #f1f5f9; }
.tax-header.cat-a { background: #eff6ff; }
.tax-header.cat-b { background: #f0fdf4; }
.tax-header.cat-c { background: #f8fafc; }
.tax-body { padding: 1.5rem; }
.std-list { list-style: none; padding-left: 0; margin: 0; font-size: 0.92rem; }
.std-list li { padding: 0.4rem 0; border-bottom: 1px solid #f1f5f9; color: #475569; }
.std-list li:last-child { border-bottom: none; }
.principle-card {
    background: #f8fafc !important;
    border-radius: 16px !important;
    padding: 32px 28px !important;
    height: 100% !important;
    border: 1px solid #f1f5f9 !important;
    transition: all 0.2s ease !important;
}
.principle-card:hover {
    transform: translateY(-3px) !important;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.05) !important;
}
.principle-header {
    display: flex !important;
    align-items: center !important;
    gap: 16px !important;
    margin-bottom: 18px !important;
}
.principle-icon-box {
    width: 54px !important;
    height: 54px !important;
    background: #0066cc !important;
    border-radius: 14px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    color: #ffffff !important;
    font-size: 22px !important;
    flex-shrink: 0 !important;
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.25) !important;
}
.principle-title {
    font-size: 1.4rem !important;
    font-weight: 700 !important;
    color: #0f172a !important;
    margin: 0 !important;
}
.principle-desc {
    color: #475569 !important;
    font-size: 0.96rem !important;
    line-height: 1.55 !important;
    margin-bottom: 16px !important;
}
.principle-list {
    padding-left: 22px !important;
    margin: 0 !important;
    color: #334155 !important;
    font-size: 0.93rem !important;
    line-height: 1.65 !important;
}
.principle-list li {
    margin-bottom: 4px !important;
}

/* ═══════ Small-screen tuning (added 2026-08-20) ═══════ */
@media (max-width: 575.98px) {
    .standards-hero .lead { font-size: 1.02rem; }
    .tax-header { padding: 1rem 1.1rem; }
    .tax-body { padding: 1.1rem; }
    /* 32px card padding is heavy at 360px. */
    .principle-card { padding: 20px 16px !important; }
    .principle-header { gap: 12px !important; margin-bottom: 14px !important; }
    .principle-icon-box { width: 46px !important; height: 46px !important; font-size: 19px !important; }
    .principle-title { font-size: 1.2rem !important; }
}