/* Nghiền Học — thành phần cho trang nội dung (dùng bên trong .nh-prose) */
.nh-prose .nh-lead{font-size:1.12rem;color:#e2e8f0}
.nh-prose .nh-meta{font-size:.85rem;color:#94a3b8}
.nh-prose .nh-toc{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:16px 20px}
.nh-prose .nh-toc strong{display:block;margin-bottom:6px}
.nh-prose .nh-toc ol{margin:0}
.nh-prose .nh-toc a{text-decoration:none}
.nh-prose .nh-toc a:hover{text-decoration:underline}

.nh-prose .nh-cards{display:grid;grid-template-columns:1fr;gap:14px;margin-top:1.2em}
@media (min-width:640px){.nh-prose .nh-cards{grid-template-columns:1fr 1fr}}
@media (min-width:900px){.nh-prose .nh-cards.nh-cards-3{grid-template-columns:1fr 1fr 1fr}}
.nh-prose .nh-card{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:18px 18px 16px}
.nh-prose .nh-card>*+*{margin-top:.5em}
.nh-prose .nh-card h3{margin-top:0;font-size:1.05rem;color:#fff;display:flex;align-items:center;gap:10px}
.nh-prose .nh-card h3 i{width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;font-size:.95rem;flex:none;background:linear-gradient(135deg,rgba(147,51,234,.35),rgba(34,211,238,.25));color:#a5f3fc}
.nh-prose .nh-card p{font-size:.95rem;color:#cbd5e1}
.nh-prose a.nh-card{display:block;text-decoration:none;color:inherit;transition:border-color .2s,transform .2s}
.nh-prose a.nh-card:hover{border-color:rgba(167,139,250,.6);transform:translateY(-2px)}

.nh-prose .nh-note{border-radius:14px;padding:14px 18px;background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.25);color:#e2e8f0;font-size:.97rem}
.nh-prose .nh-note-warn{background:rgba(251,191,36,.08);border-color:rgba(251,191,36,.3)}

.nh-prose .nh-steps{list-style:none;padding-left:0;counter-reset:nhs}
.nh-prose .nh-steps>li{position:relative;padding-left:52px;counter-increment:nhs;min-height:38px}
.nh-prose .nh-steps>li+li{margin-top:1em}
.nh-prose .nh-steps>li::before{content:counter(nhs);position:absolute;left:0;top:-2px;width:36px;height:36px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;background:linear-gradient(135deg,#9333ea,#6366f1)}

.nh-prose .nh-btn,.nh-form .nh-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:12px;border:0;cursor:pointer;font-weight:700;font-size:.95rem;color:#fff!important;text-decoration:none!important;background:linear-gradient(90deg,#9333ea,#6366f1);box-shadow:0 8px 24px -8px rgba(147,51,234,.6);transition:filter .2s,transform .2s}
.nh-prose .nh-btn:hover,.nh-form .nh-btn:hover{filter:brightness(1.1);transform:translateY(-1px)}
.nh-prose .nh-btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.2);box-shadow:none}
.nh-prose .nh-btns{display:flex;flex-wrap:wrap;gap:10px}

.nh-prose .nh-table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.nh-prose .nh-table-wrap table{min-width:520px}
.nh-prose td .katex{font-size:1.05em}
.nh-prose .nh-formula{text-align:center;overflow-x:auto;padding:4px 0}

/* Form liên hệ */
.nh-form-wrap{margin-top:1.2em}
.nh-form{display:flex;flex-direction:column;gap:14px}
.nh-form label{display:block;font-size:.92rem;font-weight:600;color:#e2e8f0}
.nh-form label>input,.nh-form label>select,.nh-form label>textarea{display:block;margin-top:6px}
.nh-form label span{color:#f472b6}
.nh-form input[type=text],.nh-form input[type=email],.nh-form input[type=tel],.nh-form select,.nh-form textarea{width:100%;background:rgba(10,13,36,.8);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:11px 14px;color:#fff;font:inherit;font-weight:400;font-size:.97rem;outline:none;transition:border-color .2s,box-shadow .2s}
.nh-form select option{background:#0a0d24}
.nh-form input:focus,.nh-form select:focus,.nh-form textarea:focus{border-color:#8b5cf6;box-shadow:0 0 0 3px rgba(139,92,246,.25)}
.nh-form-row{display:grid;grid-template-columns:1fr;gap:14px}
@media (min-width:640px){.nh-form-row{grid-template-columns:1fr 1fr}}
.nh-form .nh-check{display:block;position:relative;padding-left:28px;font-weight:400;color:#cbd5e1;line-height:1.6}
.nh-form .nh-check input{position:absolute;left:0;top:4px;margin:0;accent-color:#8b5cf6;width:16px;height:16px}
.nh-form .nh-btn{align-self:flex-start}
.nh-hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;overflow:hidden}
.nh-alert{border-radius:12px;padding:12px 16px;margin-bottom:14px;font-size:.95rem}
.nh-alert-ok{background:rgba(16,185,129,.12);border:1px solid rgba(16,185,129,.4);color:#a7f3d0}
.nh-alert-err{background:rgba(244,63,94,.1);border:1px solid rgba(244,63,94,.4);color:#fecdd3}

/* Danh sách đề ([nhq_quiz_list]) đặt trong trang nội dung: nằm gọn trong khung chữ */
.nh-prose .nhq-list.alignwide{margin-left:0!important;margin-right:0!important;width:100%!important;max-width:100%!important;box-sizing:border-box;padding:0!important;background:none!important;border:0!important;box-shadow:none!important;margin-bottom:28px!important}
.nh-prose .nhq-list .nhq-card{text-decoration:none}