/* ============================================================
   MONA edu-demo — class riêng cho demo thao tác thật
   (nền: css/mona-exam.css — MONA Color Guide, Be Vietnam Pro)
   ============================================================ */

/* layout 2 cột: bảng điều khiển trái + điện thoại phải */
.demo-wrap{display:grid;grid-template-columns:1fr 360px;gap:30px;align-items:start;margin-top:26px}
.demo-left{min-width:0}
.demo-right{position:sticky;top:82px}
.phone-label{text-align:center;font-size:13.5px;font-weight:700;margin-bottom:10px;color:var(--mona-deep-blue)}
.phone-label span{display:block;font-weight:400;font-size:12px;color:var(--ink-soft)}

/* guide-tip cam nét đứt (đồng bộ thithu.mona.media) */
.guide-tip{background:rgba(247,144,9,.1);border:1.5px dashed var(--mona-orange);border-radius:12px;padding:10px 14px;font-size:13.5px;margin-top:14px}
.guide-tip b{color:#9A5B00}

/* panel thao tác của giáo viên / giảng viên */
.op-card{background:#fff;border:1.5px solid var(--line);border-radius:18px;padding:20px 22px;margin-bottom:18px}
.op-card>h3{font-size:16.5px;margin-bottom:4px;display:flex;align-items:center;gap:9px}
.op-card>h3 .step{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:9px;background:var(--mona-ridge);color:#fff;font-size:13px;font-weight:800;flex:0 0 auto}
.op-card>.hint{font-size:13px;color:var(--ink-soft);margin-bottom:14px}

/* hàng học sinh + điểm danh */
.stu-row{display:flex;align-items:center;gap:10px;padding:8px 10px;border:1.5px solid var(--line);border-radius:12px;margin-bottom:8px;font-size:14.5px;background:#fff}
.stu-row .ava{width:30px;height:30px;border-radius:50%;background:var(--mona-paper);border:1.5px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;color:var(--mona-deep-blue);flex:0 0 auto}
.stu-row .nm{font-weight:600;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.stu-row .nm small{display:block;font-weight:400;font-size:11.5px;color:var(--ink-soft)}
.stu-row.is-ma{border-color:var(--mona-blue);background:rgba(59,130,214,.05)}
.att-btns{margin-left:auto;display:flex;gap:6px;flex:0 0 auto}
.att-btn{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:5px 13px;font-size:12.5px;font-weight:700;color:var(--ink-soft);transition:.15s}
.att-btn.on-ok{background:rgba(30,158,106,.13);border-color:var(--ok);color:var(--ok)}
.att-btn.on-absent{background:rgba(226,49,100,.1);border-color:var(--mona-magenta);color:var(--mona-magenta)}

/* form nhỏ */
.mini-form{display:flex;flex-direction:column;gap:10px}
.mini-form select,.mini-form input[type=text],.mini-form input[type=time],.mini-form textarea{border:1.5px solid var(--line);border-radius:11px;padding:10px 13px;font-size:14.5px;font-family:inherit;color:var(--mona-ink);background:#fff;width:100%}
.mini-form select:focus,.mini-form input:focus,.mini-form textarea:focus{outline:none;border-color:var(--mona-blue);box-shadow:0 0 0 3px rgba(59,130,214,.13)}
.mini-form textarea{resize:vertical;min-height:64px}
.mini-form .row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}

/* bảng học phí */
.fee-table{width:100%;border-collapse:separate;border-spacing:0;font-size:14px}
.fee-table th{text-align:left;font-size:12px;letter-spacing:.4px;text-transform:uppercase;color:var(--ink-soft);padding:6px 10px;border-bottom:1.5px solid var(--line)}
.fee-table td{padding:9px 10px;border-bottom:1px solid var(--line)}
.fee-table tr:last-child td{border-bottom:0}
.fee-table .money{font-variant-numeric:tabular-nums;font-weight:700;white-space:nowrap}
.pill{display:inline-flex;align-items:center;gap:5px;border-radius:999px;padding:3px 11px;font-size:12px;font-weight:800;white-space:nowrap}
.pill-paid{background:rgba(30,158,106,.13);color:var(--ok)}
.pill-due{background:rgba(226,49,100,.1);color:var(--mona-magenta)}
.pill-flash{animation:pillflash 1.1s ease 2}
@keyframes pillflash{50%{box-shadow:0 0 0 6px rgba(30,158,106,.18)}}

/* mock điện thoại Zalo phụ huynh (pattern .slk-phone từ LP sổ liên lạc) */
.slk-phone{width:340px;max-width:100%;background:#0f1420;border-radius:34px;padding:14px;box-shadow:0 18px 50px rgba(27,31,42,.25);margin:0 auto}
.slk-screen{background:#e8eaf0;border-radius:24px;overflow:hidden;height:560px;display:flex;flex-direction:column}
.slk-statusbar{background:#0068ff;color:#fff;font-size:12.5px;font-weight:700;padding:10px 14px;display:flex;justify-content:space-between;flex:0 0 auto}
.slk-feed{flex:1 1 auto;overflow-y:auto;padding-bottom:12px}
.slk-empty{text-align:center;font-size:12.5px;color:#8a90a3;padding:26px 20px}
.slk-noti{background:#fff;border-radius:14px;margin:9px 10px 0;padding:12px 13px;box-shadow:0 3px 10px rgba(27,31,42,.07);font-size:13px;opacity:0;transform:translateY(10px);transition:.45s;line-height:1.55;color:#1B1F2A}
.slk-noti.show{opacity:1;transform:none}
.slk-noti b{font-size:13.5px}
.slk-noti .t{color:#8a90a3;font-size:11px;float:right}
.slk-noti .qr{display:flex;align-items:center;gap:10px;background:#f0f3ff;border:1px dashed var(--mona-blue);border-radius:10px;padding:8px 11px;font-size:12px;font-weight:700;color:var(--mona-deep-blue);margin-top:8px}
.slk-noti .qr svg{flex:0 0 auto}
.slk-noti .act{display:block;width:100%;margin-top:9px;border:0;border-radius:9px;background:#0068ff;color:#fff;font-weight:700;font-size:12.5px;padding:9px 10px;cursor:pointer}
.slk-noti .act:disabled{background:rgba(30,158,106,.15);color:#1E9E6A;cursor:default}

/* tab (LMS) */
.tabbar{display:flex;gap:8px;margin-bottom:18px;flex-wrap:wrap}
.tabbar button{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:9px 20px;font-size:14px;font-weight:700;color:var(--ink-soft);transition:.15s}
.tabbar button.on{background:var(--mona-deep-blue);border-color:var(--mona-deep-blue);color:#fff}
.tabpane{display:none}
.tabpane.on{display:block}

/* lưới lịch tuần (LMS) */
.week-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:7px;margin-top:6px}
.week-grid .day{background:var(--mona-paper);border:1.5px solid var(--line);border-radius:12px;padding:8px 7px;min-height:118px}
.week-grid .day h4{font-size:11.5px;letter-spacing:.4px;text-transform:uppercase;color:var(--ink-soft);margin-bottom:7px;text-align:center}
.lesson{border-radius:9px;padding:6px 8px;font-size:11.5px;font-weight:700;line-height:1.4;margin-bottom:6px;color:#fff}
.lesson small{display:block;font-weight:600;opacity:.85;font-size:10.5px}
.lesson.c-toan9{background:var(--mona-deep-blue)}
.lesson.c-toan8{background:var(--mona-purple)}
.lesson.c-ly8{background:var(--mona-magenta)}
.lesson.is-new{outline:2.5px solid var(--mona-orange);outline-offset:1.5px}

/* thanh tổng quan giảng viên */
.ov-bar{display:flex;gap:22px;flex-wrap:wrap;background:var(--mona-ink);border-radius:16px;padding:14px 20px;margin-top:18px}
.ov-bar .it{font-size:12px;color:#9AA1B5}
.ov-bar .it b{display:block;font-size:16px;color:#fff;font-variant-numeric:tabular-nums}

/* toast xác nhận thao tác */
#demoToast{position:fixed;right:18px;bottom:18px;z-index:90;background:var(--mona-ink);color:#fff;border-radius:13px;padding:12px 18px;font-size:13.5px;font-weight:600;box-shadow:0 10px 30px rgba(27,31,42,.3);max-width:340px;opacity:0;transform:translateY(10px);transition:.3s;pointer-events:none}
#demoToast.show{opacity:1;transform:none}

/* hero demo con */
.demo-hero{padding:40px 0 8px}
.demo-hero h1{font-size:clamp(24px,3.2vw,34px);font-weight:900;line-height:1.25;margin:12px 0 10px}
.demo-hero .lead{font-size:15.5px;color:var(--ink-soft);max-width:720px}
.hero-gau{display:flex;gap:16px;align-items:center}
.hero-gau img{width:92px;height:auto;flex:0 0 auto}

@media (max-width:980px){
  .demo-wrap{grid-template-columns:1fr}
  .demo-right{position:static}
  .week-grid{grid-template-columns:repeat(4,1fr)}
}
@media (max-width:600px){
  .week-grid{grid-template-columns:repeat(2,1fr)}
  .mini-form .row2{grid-template-columns:1fr}
}