/* v4.12 – Diễn đàn Phụ huynh + Kênh thảo luận. Mọi quy tắc nằm trong .dd để không đụng site.css (.hero/.card/.btn). */
.dd{--dd-bg:#F5F8FC;--dd-card:#fff;--dd-line:#DFE6EF;--dd-ink:#1D1E20;--dd-ink2:#4A5563;--dd-mute:#6F7A86;--dd-good:#1F7A4D;--dd-good-bg:#E5F4EC;--dd-warn:#9A5A12;--dd-warn-bg:#FDF1DE;--dd-bad:#A23B2A;--dd-bad-bg:#F9E3DE;background:var(--dd-bg);padding-bottom:56px}
.dd section{padding:0}
.dd h1,.dd h2,.dd h3{text-wrap:balance}

/* hero */
.dd .dd-hero{background:linear-gradient(160deg,#173B6C 0%,#1F4F8C 100%);color:#fff;padding:52px 0 60px}
.dd .dd-hero-sm{padding:34px 0 44px}
.dd .dd-hero-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}
.dd .dd-eyebrow{font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:#FFD27A;font-weight:700;margin:0 0 10px}
.dd .dd-eyebrow a{color:#FFD27A;text-decoration:none;letter-spacing:0;text-transform:none;font-size:.92rem}
.dd .dd-hero h1{color:#fff;font-size:clamp(1.7rem,3.4vw,2.5rem);font-weight:800;max-width:26ch;margin:0}
.dd .dd-hero-sm h1{font-size:clamp(1.5rem,3vw,2.1rem);max-width:34ch}
.dd .dd-lead{color:#D6E2F3;font-size:1.05rem;max-width:62ch;margin:14px 0 0}
.dd .dd-lead p{margin:0 0 .5em}
.dd .dd-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.dd .dd-btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1.5px solid rgba(255,255,255,.6)}
.dd .dd-btn-ghost:hover{background:rgba(255,255,255,.18)}
.dd .dd-btn-ghost2{background:#fff;color:var(--navy);border:1.5px solid var(--navy)}
.dd .dd-pledges{list-style:none;padding:0;margin:22px 0 0;display:flex;flex-wrap:wrap;gap:6px 22px;font-size:.92rem;color:#D6E2F3}
.dd .dd-pledges li{display:flex;gap:8px;align-items:center;margin:0}
.dd .dd-pledges li::before{content:"";width:8px;height:8px;border-radius:50%;background:#F5C48A;flex:none}
.dd .dd-counter{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);border-radius:14px;padding:22px 24px}
.dd .dd-cnt{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;text-align:center}
.dd .dd-cnt b{display:block;font-size:2.2rem;font-weight:800;line-height:1;font-variant-numeric:tabular-nums}
.dd .dd-cnt span{display:block;color:#D6E2F3;font-size:.84rem;margin-top:6px;line-height:1.3}
.dd .dd-cnt-note{margin:16px 0 0;padding-top:12px;border-top:1px solid rgba(255,255,255,.2);font-size:.86rem;color:#D6E2F3;text-align:center}
.dd .dd-hero .dd-stats{margin-top:16px}
.dd .dd-hero .dd-stats span{background:rgba(255,255,255,.1);color:#E8EFF8;border-color:rgba(255,255,255,.25)}
.dd .dd-hero .dd-stats b{color:#fff}
@media(max-width:820px){.dd .dd-hero-grid{grid-template-columns:1fr;gap:26px}.dd .dd-hero{padding:36px 0 44px}}

/* chung */
.dd .dd-main{padding-top:36px}
.dd .dd-h2{font-size:1.45rem;margin:30px 0 14px}
.dd .dd-h2-sm{font-size:1.15rem;color:var(--dd-mute)}
.dd .dd-n{font-weight:600;color:var(--dd-mute);font-size:.9em}
.dd .dd-empty{background:#fff;border:1px dashed var(--dd-line);border-radius:12px;padding:18px 20px;color:var(--dd-ink2)}
.dd .dd-stats{display:flex;flex-wrap:wrap;gap:6px 8px;font-size:.82rem;color:var(--dd-ink2)}
.dd .dd-stats span{background:#EEF3FA;border:1px solid var(--dd-line);border-radius:99px;padding:2px 10px;white-space:nowrap}
.dd .dd-stats b{color:var(--navy);font-variant-numeric:tabular-nums}
.dd .dd-chip{display:inline-block;font-size:.74rem;font-weight:700;padding:2px 9px;border-radius:99px;background:#E8EEF7;color:var(--navy);vertical-align:middle;letter-spacing:.02em}
.dd .dd-chip-sum{background:var(--dd-warn-bg);color:var(--dd-warn)}
.dd .dd-chip-zalo{background:#E3F0FF;color:#0A5FC2}.dd .dd-chip-facebook{background:#E7ECFA;color:#1B3F9C}.dd .dd-chip-telegram{background:#E1F3FB;color:#1C7BA8}.dd .dd-chip-khac{background:#EEF0F2;color:#4A5563}
.dd .dd-hero h1 .dd-chip{background:rgba(255,255,255,.2);color:#fff;font-size:.6em}

/* danh sách chủ đề */
.dd .dd-topics{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.dd .dd-topic{display:flex;flex-direction:column;gap:10px;background:var(--dd-card);border:1px solid var(--dd-line);border-radius:14px;padding:22px 22px 18px;text-decoration:none;color:var(--dd-ink);transition:box-shadow .15s,transform .15s;box-shadow:0 4px 14px rgba(23,59,108,.05)}
.dd .dd-topic:hover{box-shadow:0 10px 28px rgba(23,59,108,.12);transform:translateY(-2px)}
.dd .dd-topic h3{margin:0;font-size:1.12rem;color:var(--navy)}
.dd .dd-topic p{margin:0;color:var(--dd-ink2);font-size:.95rem}
.dd .dd-topic-foot{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-top:auto;padding-top:8px}
.dd .dd-go{color:var(--orange-2);font-weight:700;font-size:.92rem;margin-left:auto}
.dd .dd-topics-closed .dd-topic{opacity:.85}

/* nói rõ */
.dd .dd-noiro{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.dd .dd-nr{position:relative;background:var(--dd-card);border:1px solid var(--dd-line);border-radius:14px;padding:22px 22px 18px 22px}
.dd .dd-nr-n{position:absolute;top:-12px;left:18px;width:28px;height:28px;border-radius:50%;background:var(--orange);color:#0D141A;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:.9rem}
.dd .dd-nr h3{font-size:1.05rem;margin:6px 0 8px}
.dd .dd-nr p{margin:0;font-size:.95rem;color:var(--dd-ink2)}

/* quy tắc + disclaimer */
.dd .dd-rules{margin-top:34px}
.dd .dd-rules-in{background:var(--dd-card);border:1px solid var(--dd-line);border-left:5px solid var(--navy);border-radius:14px;padding:22px 26px}
.dd .dd-rules h2{font-size:1.25rem;margin:0 0 10px}
.dd .dd-rules ol{margin:0 0 14px;padding-left:1.3em}
.dd .dd-rules li{margin:.35em 0;color:var(--dd-ink)}
.dd .dd-rules-sm .dd-rules-in{padding:18px 22px}
.dd .dd-rules-sm h2{font-size:1.05rem}
.dd .dd-rules-sm li{font-size:.92rem}
.dd .dd-disclaimer{margin:0;font-size:.88rem;color:var(--dd-ink2);background:#F3F6FA;border-radius:8px;padding:12px 14px}
.dd .dd-disclaimer-top{background:var(--dd-card);border:1px solid var(--dd-line);border-left:5px solid var(--orange);padding:14px 18px;margin:0 0 10px}

/* band */
.dd .dd-band{margin-top:28px;background:var(--dd-card);border:1px solid var(--dd-line);border-radius:14px;padding:18px 22px;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.dd .dd-band b{display:block;color:var(--navy)}
.dd .dd-band span{display:block;color:var(--dd-ink2);font-size:.92rem}

/* bản tổng hợp */
.dd .dd-sum{background:#FFF9F1;border:1px solid #F3DDBE;border-left:5px solid var(--orange);border-radius:14px;padding:22px 26px;margin-bottom:26px}
.dd .dd-sum-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.dd .dd-sum h2{font-size:1.3rem;margin:0}
.dd .dd-sum-body{padding:0;margin-top:12px}
.dd .dd-sum-body h2{font-size:1.1rem;margin:1.2em 0 .4em;color:var(--navy)}
.dd .dd-sum-body h3{font-size:1rem}
.dd .dd-sum-body p,.dd .dd-sum-body li{font-size:.97rem}
.dd .dd-sum-note,.dd .dd-sum-empty{margin:10px 0 0;font-size:.88rem;color:var(--dd-ink2)}

/* ý kiến */
.dd .dd-ops-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.dd .dd-ops h2{font-size:1.3rem;margin:0}
.dd .dd-sort{display:flex;background:#fff;border:1px solid var(--dd-line);border-radius:99px;padding:3px}
.dd .dd-sort a{text-decoration:none;color:var(--dd-ink2);font-size:.86rem;font-weight:600;padding:6px 14px;border-radius:99px}
.dd .dd-sort a.cur{background:var(--navy);color:#fff}
.dd .dd-list{display:flex;flex-direction:column;gap:12px}
.dd .dd-op{background:var(--dd-card);border:1px solid var(--dd-line);border-radius:14px;padding:18px 22px}
.dd .dd-op-head{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;align-items:baseline;margin-bottom:8px}
.dd .dd-op-head b{color:var(--navy)}
.dd .dd-op-meta{font-size:.8rem;color:var(--dd-mute)}
.dd .dd-op-body{white-space:normal;color:var(--dd-ink);font-size:.98rem;line-height:1.6;overflow-wrap:anywhere}
.dd .dd-op-foot{margin-top:12px;display:flex;justify-content:flex-end}
.dd .dd-agree{font:inherit;font-size:.9rem;font-weight:700;display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--navy);border:1.5px solid var(--navy);border-radius:99px;padding:7px 14px 7px 12px;cursor:pointer;transition:background .15s,color .15s}
.dd .dd-agree:hover{background:#EEF3FA}
.dd .dd-agree.on{background:var(--navy);color:#fff}
.dd .dd-agree-ic{width:20px;height:20px;border-radius:50%;background:var(--navy);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:800;flex:none}
.dd .dd-agree.on .dd-agree-ic{background:#fff;color:var(--navy)}
.dd .dd-agree-n{background:rgba(23,59,108,.1);border-radius:99px;padding:1px 9px;font-variant-numeric:tabular-nums}
.dd .dd-agree.on .dd-agree-n{background:rgba(255,255,255,.2)}
.dd .dd-agree:disabled{opacity:.55;cursor:wait}

/* form */
.dd .dd-form-wrap{margin-top:30px;background:var(--dd-card);border:1px solid var(--dd-line);border-radius:14px;padding:24px 26px}
.dd .dd-form-wrap h2{font-size:1.3rem;margin:0 0 6px}
.dd .dd-form-wrap>p{color:var(--dd-ink2);font-size:.95rem}
.dd .dd-row{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
@media(max-width:640px){.dd .dd-row{grid-template-columns:1fr}}
.dd .dd-field{margin:12px 0 0}
.dd .dd-field label{display:block;font-weight:700;font-size:.92rem;margin-bottom:5px;color:var(--navy)}
.dd .dd-field input,.dd .dd-field textarea,.dd .dd-field select{width:100%;font:inherit;font-size:1rem;padding:11px 13px;border:1.5px solid var(--dd-line);border-radius:10px;background:#fff;color:var(--dd-ink)}
.dd .dd-field input:focus,.dd .dd-field textarea:focus,.dd .dd-field select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(39,100,165,.15)}
.dd .dd-field textarea{resize:vertical;min-height:140px;line-height:1.55}
.dd .dd-field small{display:block;margin-top:5px;font-size:.82rem;color:var(--dd-mute)}
.dd .dd-count{float:right;font-variant-numeric:tabular-nums}
.dd .dd-known-in{display:flex;align-items:center;gap:12px;padding:11px 13px;border:1.5px dashed var(--dd-line);border-radius:10px;background:#F7FAF8;color:var(--dd-good);font-weight:600}
.dd .dd-link{font:inherit;font-size:.9rem;background:none;border:0;padding:0;color:var(--blue);text-decoration:underline;cursor:pointer}
.dd .dd-radios{display:flex;flex-wrap:wrap;gap:8px}
.dd .dd-radio{display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border:1.5px solid var(--dd-line);border-radius:99px;background:#fff;font-size:.92rem;cursor:pointer}
.dd .dd-radio:has(input:checked){border-color:var(--navy);background:#EEF3FA;color:var(--navy);font-weight:600}
.dd .dd-radio input{margin:0}
.dd .dd-check{display:flex;gap:10px;align-items:flex-start;margin:16px 0 0;font-size:.92rem;color:var(--dd-ink2);cursor:pointer}
.dd .dd-check input{margin:4px 0 0;width:18px;height:18px;flex:none}
.dd .dd-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:18px}
.dd .dd-err{margin:12px 0 0;padding:10px 14px;border-radius:10px;background:var(--dd-bad-bg);color:var(--dd-bad);font-size:.92rem}
.dd .dd-warn{margin:8px 0 0;padding:10px 14px;border-radius:10px;background:var(--dd-warn-bg);color:var(--dd-warn);font-size:.9rem}
.dd .dd-hp{position:absolute;left:-9999px;top:-9999px;width:1px;height:1px;overflow:hidden}
.dd .dd-ok{text-align:center;padding:26px 16px}
.dd .dd-ok-ic{width:56px;height:56px;border-radius:50%;background:var(--dd-good-bg);color:var(--dd-good);display:inline-flex;align-items:center;justify-content:center;font-size:1.6rem;font-weight:800;margin-bottom:12px}
.dd .dd-ok p{font-size:1.02rem;max-width:56ch;margin:0 auto .6em}
.dd .dd-ok .dd-actions{justify-content:center}
.dd .dd-ok-page{background:var(--dd-card);border:1px solid var(--dd-line);border-radius:14px;padding:36px 24px}
.dd .dd-ok-bad .dd-ok-ic{background:var(--dd-warn-bg);color:var(--dd-warn)}
.dd .btn:disabled{opacity:.5;cursor:not-allowed}

/* dialog */
.dd-dlg{border:0;border-radius:14px;padding:0;width:min(480px,calc(100% - 24px));color:var(--ink);box-shadow:0 20px 60px rgba(10,20,35,.3)}
.dd-dlg::backdrop{background:rgba(10,20,35,.55)}
.dd-dlg .dd-form,.dd-dlg .dd-ok{padding:22px}
.dd-dlg h2{font-size:1.2rem;margin:0 0 6px}
.dd-dlg p{font-size:.95rem;color:var(--ink-2)}

/* nhóm */
.dd .dd-groups{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.dd .dd-group{background:var(--dd-card);border:1px solid var(--dd-line);border-radius:14px;padding:20px 22px;display:flex;flex-direction:column;gap:8px}
.dd .dd-group-head{display:flex;flex-direction:column;gap:6px;align-items:flex-start}
.dd .dd-group h3{margin:0;font-size:1.08rem}
.dd .dd-group p{margin:0;font-size:.95rem;color:var(--dd-ink2)}
.dd .dd-group-meta{font-size:.84rem;color:var(--dd-mute)}
.dd .dd-group-foot{margin-top:auto;padding-top:6px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
@media(max-width:480px){.dd .dd-form-wrap,.dd .dd-rules-in,.dd .dd-sum{padding:18px 16px}.dd .dd-op{padding:16px}.dd .dd-op-foot{justify-content:stretch}.dd .dd-agree{width:100%;justify-content:center}}

/* v4.13: thông báo tạm dừng / đóng băng */
.dd .dd-notice{border:1px solid #E08D2D;border-left:5px solid #E08D2D;background:#FFF7EC;color:#5A3A0F;margin:18px 0 0}