:root {
  --forest-1000:#041812;
  --forest-950:#062219;
  --forest-900:#082b21;
  --forest-850:#0b3629;
  --forest-800:#104634;
  --forest-700:#176347;
  --forest-600:#24805b;
  --sage:#9bbcae;
  --mint:#dcebe3;
  --ivory:#f7f3e7;
  --ivory-2:#fcfaf4;
  --gold:#c3a45c;
  --gold-light:#e6d39a;
  --ink:#15231e;
  --muted:#65766f;
  --line:#dfe7e2;
  --white:#fff;
  --red:#b93d45;
  --orange:#b86b2e;
  --shadow:0 20px 55px rgba(4,35,25,.11);
  --radius:20px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#eef3ef;color:var(--ink);font-family:"Be Vietnam Pro",system-ui,sans-serif}
button,input,select,textarea{font:inherit}button{cursor:pointer}
a{color:inherit}
.shell{min-height:100vh;display:grid;grid-template-columns:280px minmax(0,1fr)}
.sidebar{height:100vh;position:sticky;top:0;background:linear-gradient(180deg,var(--forest-950),var(--forest-1000));color:var(--ivory);padding:25px 18px;display:flex;flex-direction:column;z-index:40;box-shadow:12px 0 40px rgba(3,24,18,.13)}
.brand{padding:4px 8px 25px;border-bottom:1px solid rgba(255,255,255,.09);margin-bottom:18px}.brand img{width:184px;max-height:88px;object-fit:contain;object-position:left center}.brand small{display:block;color:#a9c0b7;font-size:10px;letter-spacing:1.5px;margin-top:5px}
.nav{display:grid;gap:7px}.nav button{border:0;background:transparent;color:#aebfb8;text-align:left;padding:12px 14px;border-radius:12px;display:flex;align-items:center;gap:12px;transition:.2s}.nav button:hover{background:rgba(255,255,255,.06);color:#fff}.nav button.active{color:#fff;background:linear-gradient(90deg,rgba(195,164,92,.2),rgba(36,128,91,.15));box-shadow:inset 3px 0 var(--gold)}.nav .ico{width:22px;text-align:center;font-size:17px}.nav .student-nav{margin-top:9px;border:1px solid rgba(230,211,154,.18);color:var(--gold-light)}
.side-note{margin-top:auto;border:1px solid rgba(230,211,154,.18);background:rgba(255,255,255,.045);border-radius:16px;padding:15px}.side-note strong{font-size:12px}.side-note p{font-size:10px;line-height:1.6;color:#a8bbb3;margin:7px 0 0}.side-user{display:flex;align-items:center;gap:10px;padding:17px 8px 0}.avatar{width:39px;height:39px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,var(--mint),#f2e8c9);color:var(--forest-900);font-size:11px;font-weight:800;flex:0 0 auto}.side-user strong{font-size:11px;display:block}.side-user span{font-size:9px;color:#95aaa1}
.main{min-width:0}.topbar{height:88px;position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;padding:18px 30px;background:rgba(252,250,244,.9);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.topbar h1{font-family:"Playfair Display",serif;margin:0;font-size:26px;color:var(--forest-900)}.eyebrow{font-size:9px;letter-spacing:1.8px;color:var(--forest-600);font-weight:800;margin:0 0 2px}.top-actions{display:flex;align-items:center;gap:10px}.date-pill,.mode-pill{border:1px solid var(--line);background:#fff;padding:9px 12px;border-radius:11px;font-size:10px;color:var(--muted)}.mode-pill{color:var(--forest-700);background:var(--mint);border-color:#c8ddd2}.menu-btn{display:none}
.content{padding:28px 30px 45px;max-width:1600px;margin:auto}
.hero{position:relative;overflow:hidden;border-radius:26px;background:linear-gradient(120deg,var(--forest-950),var(--forest-800) 65%,#1f6b4d);color:#fff;padding:32px;display:flex;justify-content:space-between;gap:24px;box-shadow:var(--shadow)}.hero:before{content:"";position:absolute;width:420px;height:420px;border:1px solid rgba(230,211,154,.18);border-radius:50%;right:-140px;top:-220px}.hero:after{content:"";position:absolute;width:250px;height:250px;border:1px solid rgba(255,255,255,.08);border-radius:50%;right:60px;bottom:-190px}.hero h2{font-family:"Playfair Display",serif;font-size:35px;margin:0 0 10px}.hero p{max-width:740px;color:#c4d5ce;font-size:12px;line-height:1.75;margin:0}.hero-actions{display:flex;align-items:center;gap:10px;z-index:2}
.btn{border:0;border-radius:11px;padding:10px 14px;font-size:11px;font-weight:800;transition:.18s}.btn:hover{transform:translateY(-1px)}.btn-primary{background:var(--forest-700);color:#fff;box-shadow:0 9px 20px rgba(23,99,71,.18)}.btn-primary:hover{background:var(--forest-800)}.btn-gold{background:var(--gold);color:var(--forest-1000)}.btn-light{background:var(--ivory);color:var(--forest-900)}.btn-outline{background:#fff;color:var(--forest-800);border:1px solid var(--line)}.btn-danger{background:#fbecee;color:var(--red)}.btn-block{width:100%}.btn-sm{padding:6px 9px;font-size:9px}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:20px}.stat{background:var(--ivory-2);border:1px solid var(--line);border-radius:var(--radius);padding:18px;display:flex;justify-content:space-between;box-shadow:0 10px 30px rgba(4,35,25,.04)}.stat label{font-size:10px;color:var(--muted);font-weight:600}.stat h3{font-family:"Playfair Display",serif;font-size:29px;color:var(--forest-900);margin:6px 0 2px}.stat small{font-size:9px;color:var(--muted)}.stat-icon{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:var(--mint);color:var(--forest-700);font-weight:800}.stat.gold .stat-icon{background:#f6edd5;color:#8b6e29}
.grid-2{display:grid;grid-template-columns:1.25fr .75fr;gap:20px;margin-top:20px}.panel{background:var(--ivory-2);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 10px 30px rgba(4,35,25,.04)}.panel-head{padding:18px 20px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:14px}.panel-head h3{font-family:"Playfair Display",serif;color:var(--forest-900);font-size:17px;margin:0}.panel-head p{font-size:9px;color:var(--muted);margin:4px 0 0}.panel-body{padding:20px}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;min-width:760px}th,td{text-align:left;padding:13px 15px;border-bottom:1px solid var(--line);font-size:10px;vertical-align:middle}th{background:#f3f6f3;color:#6d7e76;font-size:9px;letter-spacing:.5px;text-transform:uppercase}tr:last-child td{border-bottom:0}.person{display:flex;align-items:center;gap:10px}.sub{font-size:9px;color:var(--muted);margin-top:3px}.tag{display:inline-flex;align-items:center;border-radius:999px;padding:5px 9px;font-size:9px;font-weight:800;white-space:nowrap}.tag.green{background:#e4f2e9;color:#176347}.tag.gold{background:#f5ecd5;color:#816426}.tag.red{background:#fbecee;color:var(--red)}.tag.gray{background:#edf1ef;color:#6a7a73}.tag.orange{background:#faeee3;color:var(--orange)}
.toolbar{display:flex;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}.toolbar-group{display:flex;gap:9px;flex-wrap:wrap}.input,select,textarea{border:1px solid var(--line);background:#fff;border-radius:10px;padding:10px 11px;color:var(--ink);outline:none;font-size:10px}.input:focus,select:focus,textarea:focus{border-color:#7fb39b;box-shadow:0 0 0 3px rgba(36,128,91,.1)}.search{min-width:270px}.actions{display:flex;gap:6px}
.blueprint{display:grid;gap:11px}.blueprint-item{display:flex;align-items:center;gap:12px;padding:13px;border:1px solid var(--line);background:#f4f7f4;border-radius:13px}.number{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;color:#fff;background:var(--forest-700);font-weight:800}.number.gold{background:var(--gold);color:var(--forest-1000)}.number.sage{background:#6f9f88}.blueprint-item strong{display:block;font-size:11px}.blueprint-item span{font-size:9px;color:var(--muted)}
.exam-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.exam-card{background:var(--ivory-2);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:0 10px 30px rgba(4,35,25,.04)}.exam-topline{display:flex;justify-content:space-between}.exam-seal{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:var(--mint);color:var(--forest-700);font-weight:900}.exam-card h3{font-family:"Playfair Display",serif;color:var(--forest-900);font-size:17px;margin:14px 0 7px}.exam-card p{font-size:10px;color:var(--muted);line-height:1.6}.exam-meta{display:flex;gap:12px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:11px 0;margin:12px 0;font-size:9px;color:var(--muted)}
.login-page{min-height:100vh;background:radial-gradient(circle at 20% 10%,#1a6046,transparent 28%),linear-gradient(120deg,var(--forest-1000),var(--forest-800));display:grid;grid-template-columns:1.1fr .9fr}.login-brand{padding:54px;display:flex;flex-direction:column;justify-content:space-between;color:#fff;position:relative;overflow:hidden}.login-brand:after{content:"";position:absolute;width:520px;height:520px;border:1px solid rgba(230,211,154,.18);border-radius:50%;right:-220px;bottom:-260px}.login-brand img{width:240px;max-height:118px;object-fit:contain;object-position:left center}.login-brand h1{font-family:"Playfair Display",serif;font-size:48px;max-width:700px;margin:30px 0 15px}.login-brand p{max-width:620px;color:#c4d5ce;font-size:13px;line-height:1.8}.login-points{display:flex;gap:16px;flex-wrap:wrap}.login-points span{border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.05);border-radius:999px;padding:8px 12px;font-size:9px;color:#d9e6e0}.login-side{background:var(--ivory);display:grid;place-items:center;padding:30px}.login-card{width:min(440px,100%);background:#fff;border:1px solid #e5e3d8;border-radius:24px;padding:30px;box-shadow:0 28px 75px rgba(3,24,18,.22)}.login-card h2{font-family:"Playfair Display",serif;color:var(--forest-900);font-size:28px;margin:0 0 6px}.login-card>p{font-size:10px;color:var(--muted);line-height:1.6;margin:0 0 18px}.tabs{display:grid;grid-template-columns:1fr 1fr;background:#edf2ee;border-radius:11px;padding:4px;margin-bottom:16px}.tabs button{border:0;background:transparent;padding:9px;border-radius:8px;color:var(--muted);font-size:10px;font-weight:700}.tabs button.active{background:#fff;color:var(--forest-800);box-shadow:0 3px 10px rgba(4,35,25,.07)}.field{display:grid;gap:6px;margin-bottom:12px}.field label{font-size:9px;font-weight:800;color:#596a62}.field input,.field select,.field textarea{width:100%}.login-help{font-size:9px;color:var(--muted);text-align:center;margin-top:12px;line-height:1.55}
.modal-wrap{position:fixed;inset:0;background:rgba(3,24,18,.62);z-index:100;display:grid;place-items:center;padding:20px}.modal{width:min(680px,100%);max-height:90vh;overflow:auto;background:var(--ivory-2);border-radius:20px;box-shadow:0 35px 90px rgba(0,0,0,.25)}.modal-head{padding:19px 22px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:10px}.modal-head h3{font-family:"Playfair Display",serif;margin:0;color:var(--forest-900)}.modal-body{padding:21px}.modal-foot{padding:15px 22px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:8px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.field.full{grid-column:1/-1}.field textarea{min-height:95px;resize:vertical}
.notice{background:#eaf3ee;color:var(--forest-700);border:1px solid #cfe2d7;padding:12px 13px;border-radius:12px;font-size:9px;line-height:1.6}.empty{text-align:center;padding:46px 20px;color:var(--muted);font-size:10px}.empty b{display:block;font-size:26px;margin-bottom:8px}.toast{position:fixed;right:20px;bottom:20px;background:var(--forest-950);color:#fff;padding:12px 15px;border-radius:12px;z-index:200;font-size:10px;box-shadow:var(--shadow)}
.exam-shell{max-width:1450px;margin:auto}.exam-head{position:sticky;top:100px;z-index:20;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 17px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 8px 24px rgba(4,35,25,.07)}.exam-head h2{font-family:"Playfair Display",serif;font-size:17px;margin:0;color:var(--forest-900)}.timer{font-weight:800;color:var(--red);background:#fbecee;border-radius:11px;padding:8px 11px}.exam-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:18px;margin-top:18px}.paper{display:grid;gap:13px}.section-title{background:var(--forest-950);color:#fff;border-radius:13px;padding:14px 17px}.section-title strong{display:block;font-size:11px}.section-title span{font-size:9px;color:#aec4ba}.question{background:#fff;border:1px solid var(--line);border-radius:15px;padding:18px;scroll-margin-top:180px}.question.done{border-color:#95c7ae}.qnum{font-size:9px;color:var(--forest-600);font-weight:800}.qtext{font-size:11px;line-height:1.75;margin:8px 0 13px}.options{display:grid;gap:8px}.option{display:flex;gap:9px;align-items:flex-start;border:1px solid var(--line);border-radius:10px;padding:10px;font-size:10px}.option:has(input:checked){background:#eaf3ee;border-color:#8ab9a2}.option input{accent-color:var(--forest-700)}.tf-row{display:grid;grid-template-columns:1fr 64px 64px;border:1px solid var(--line);border-bottom:0}.tf-row:first-child{border-radius:10px 10px 0 0}.tf-row:last-child{border-bottom:1px solid var(--line);border-radius:0 0 10px 10px}.tf-row>div,.tf-row>label{padding:9px;font-size:9px}.tf-row>label{text-align:center;border-left:1px solid var(--line)}.navigator{align-self:start;position:sticky;top:185px;background:#fff;border:1px solid var(--line);border-radius:15px;padding:15px}.navigator h3{font-family:"Playfair Display",serif;margin:0;color:var(--forest-900)}.navigator p{font-size:9px;color:var(--muted)}.qgrid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.qjump{aspect-ratio:1;border:1px solid var(--line);background:#fff;border-radius:8px;font-size:9px;font-weight:800}.qjump.done{background:var(--forest-700);color:#fff;border-color:var(--forest-700)}
.result{max-width:760px;margin:30px auto;background:#fff;border:1px solid var(--line);border-radius:24px;padding:30px;text-align:center;box-shadow:var(--shadow)}.score{width:150px;height:150px;border-radius:50%;margin:15px auto;display:grid;place-items:center;background:conic-gradient(var(--gold) calc(var(--s)*10%),#edf1ef 0);position:relative}.score:after{content:"";position:absolute;inset:12px;border-radius:50%;background:#fff}.score strong{z-index:2;font-family:"Playfair Display",serif;font-size:38px;color:var(--forest-900)}.score-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:20px 0}.score-grid div{border:1px solid var(--line);background:#f4f7f4;border-radius:12px;padding:12px}.score-grid strong{display:block;color:var(--forest-800)}.score-grid span{font-size:8px;color:var(--muted)}
@media(max-width:1100px){.stats{grid-template-columns:repeat(2,1fr)}.grid-2{grid-template-columns:1fr}.exam-grid{grid-template-columns:repeat(2,1fr)}.exam-layout{grid-template-columns:1fr}.navigator{position:static;order:-1}.qgrid{grid-template-columns:repeat(10,1fr)}.login-brand h1{font-size:39px}}
@media(max-width:820px){.shell{display:block}.sidebar{position:fixed;left:-290px;width:280px;transition:left .2s}.sidebar.open{left:0}.menu-btn{display:inline-grid}.topbar{height:78px;padding:14px 17px}.content{padding:20px 15px 35px}.hero{display:block;padding:23px}.hero-actions{margin-top:17px}.login-page{grid-template-columns:1fr}.login-brand{min-height:320px;padding:30px}.login-brand h1{font-size:34px}.login-side{padding:20px}.date-pill{display:none}.exam-head{top:88px}}
@media(max-width:600px){.stats,.exam-grid,.score-grid{grid-template-columns:1fr}.hero-actions{flex-direction:column;align-items:stretch}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.search{min-width:100%}.login-brand{display:none}.login-page{display:block;background:var(--ivory);padding:18px;min-height:100vh}.login-side{padding:0;min-height:calc(100vh - 36px)}.login-card{padding:24px}.qgrid{grid-template-columns:repeat(7,1fr)}.tf-row{grid-template-columns:1fr 52px 52px}.topbar h1{font-size:22px}}

/* V4 - Nhập đề, lịch sử làm bài và đối chiếu đáp án */
.import-help{display:flex;align-items:center;justify-content:space-between;gap:16px;background:#f3f7f4;border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:15px}.import-help strong{font-size:11px}.import-help p{font-size:9px;color:var(--muted);margin:5px 0 0;line-height:1.6}.import-text{min-height:280px!important;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:10px!important;line-height:1.55}.import-summary{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin-bottom:10px}.import-summary>div{border:1px solid var(--line);background:#f4f7f4;border-radius:11px;padding:11px;text-align:center}.import-summary strong{display:block;font-family:"Playfair Display",serif;font-size:20px;color:var(--forest-800)}.import-summary span{font-size:8px;color:var(--muted)}.import-errors,.import-warnings{border-radius:11px;padding:11px 13px;font-size:9px;line-height:1.55;margin-top:9px}.import-errors{background:#fbecee;color:var(--red);border:1px solid #efc9cd}.import-warnings{background:#fff6df;color:#785e22;border:1px solid #ead7a5}.import-errors ul,.import-warnings ul{margin:5px 0 0;padding-left:18px}
.attempt-history{margin-top:14px;border-top:1px solid var(--line);padding-top:12px}.attempt-history>strong{font-size:9px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}.attempt-history>div{display:grid;grid-template-columns:1fr auto auto;gap:8px;align-items:center;padding:8px 0;border-bottom:1px dashed var(--line);font-size:9px}.attempt-history>div:last-child{border-bottom:0}.attempt-history b{color:var(--forest-800);font-size:12px}
.result-wide{max-width:920px}.review-head{text-align:left;margin-top:28px;border-top:1px solid var(--line);padding-top:20px}.review-head h3{font-family:"Playfair Display",serif;color:var(--forest-900);margin:0}.review-head p{font-size:9px;color:var(--muted)}.review-list{display:grid;gap:12px;text-align:left}.review-card{border:1px solid var(--line);border-left:5px solid var(--forest-600);border-radius:14px;padding:15px;background:#fff}.review-card.wrong{border-left-color:var(--red);background:#fffafa}.review-title{display:flex;align-items:center;justify-content:space-between;gap:10px}.review-title>strong{color:var(--forest-800);font-size:11px}.review-answer{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}.review-answer>span{border:1px solid var(--line);background:#f5f8f6;border-radius:10px;padding:10px;font-size:9px;line-height:1.5}.review-tf{display:grid;gap:7px;margin-top:10px}.review-tf>div{display:flex;justify-content:space-between;gap:12px;border:1px solid var(--line);border-radius:9px;padding:9px;font-size:9px}.review-tf>div.ok{background:#edf7f1;border-color:#c6e2d2}.review-tf>div.bad{background:#fff1f2;border-color:#efc9cd}.review-tf b{white-space:nowrap}.explanation{margin-top:11px;background:#f2eee2;border:1px solid #e5d7b2;border-radius:10px;padding:11px;font-size:9px;line-height:1.65}.explanation>strong{color:#735b25}.explanation>div{margin-top:4px;white-space:pre-wrap}
@media(max-width:700px){.import-help{align-items:flex-start;flex-direction:column}.import-summary{grid-template-columns:repeat(2,1fr)}.review-answer{grid-template-columns:1fr}.review-tf>div{display:grid}.attempt-history>div{grid-template-columns:1fr auto}.attempt-history button{grid-column:1/-1}.modal{max-height:94vh}}

/* V5 - Phân lớp, thư mục đề, VSAT và đề nhiều hình */
.tag-wrap{display:flex;gap:5px;flex-wrap:wrap}.track-options{display:grid;grid-template-columns:1fr 1fr;gap:10px}.track-options>label{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);border-radius:13px;padding:12px;background:#fff;cursor:pointer}.track-options>label:has(input:checked){background:#eaf3ee;border-color:#83b49d}.track-options input{margin-top:3px;accent-color:var(--forest-700)}.track-options b,.track-options small{display:block}.track-options small{font-size:8px;color:var(--muted);margin-top:3px}.class-checks{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.class-checks label{border:1px solid var(--line);background:#fff;border-radius:10px;padding:10px;font-size:10px}.class-checks label:has(input:checked){background:#eaf3ee;border-color:#83b49d}.class-checks input{accent-color:var(--forest-700)}
.program-section,.student-program{margin-top:26px}.program-title{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:15px}.program-title h2{font-family:"Playfair Display",serif;color:var(--forest-900);margin:7px 0 0;font-size:25px}.folder-block{margin:0 0 22px}.folder-head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 2px 9px;margin-bottom:11px}.folder-head h3{font-family:"Playfair Display",serif;color:var(--forest-850);margin:0;font-size:17px}.folder-head span{font-size:9px;color:var(--muted)}.folder-empty{grid-column:1/-1;border:1px dashed #bdcbc4;border-radius:15px;padding:24px;text-align:center;color:var(--muted);font-size:10px;background:rgba(255,255,255,.45)}.exam-actions{margin-top:14px;justify-content:space-between}.student-folder{background:rgba(255,255,255,.45);border:1px solid var(--line);border-radius:17px;margin-bottom:13px;overflow:hidden}.student-folder summary{display:flex;align-items:center;justify-content:space-between;padding:15px 18px;cursor:pointer;background:var(--ivory-2);font-family:"Playfair Display",serif;color:var(--forest-850)}.student-folder summary b{font-family:"Be Vietnam Pro",sans-serif;font-size:9px;background:var(--mint);padding:5px 9px;border-radius:999px}.student-folder .exam-grid{padding:15px}
.subq{border:1px solid var(--line);border-radius:13px;padding:13px;margin:12px 0;background:#f8faf8}.subq legend{font-size:10px;font-weight:800;color:var(--forest-700);padding:0 7px}.subq textarea{width:100%;min-height:65px;margin-bottom:9px}.matching-editor{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:12px 0}.matching-editor>div{display:grid;gap:7px}.matching-editor b{font-size:10px;color:var(--forest-800)}
.question-images{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin:12px 0}.question-images img{width:100%;max-height:520px;object-fit:contain;background:#fff;border:1px solid var(--line);border-radius:12px;padding:6px}.group-subquestions{display:grid;gap:13px}.group-sub{border:1px solid var(--line);border-radius:13px;padding:13px;background:#fafcfb}.group-sub>strong{font-size:10px;color:var(--forest-700)}.matching-question{display:grid;gap:9px}.matching-right{border:1px solid var(--line);border-radius:12px;background:#f4f7f4;padding:12px}.matching-right>b{font-size:10px}.matching-right>div{display:grid;grid-template-columns:30px 1fr;gap:7px;padding:6px 0;font-size:10px}.matching-right>div span{font-weight:800;color:var(--forest-700)}.match-row{display:grid;grid-template-columns:1fr 110px;gap:12px;align-items:center;border:1px solid var(--line);border-radius:10px;padding:10px;font-size:10px}.match-row select{width:100%}
.source-viewer{margin-top:16px;background:#fff;border:1px solid var(--line);border-radius:17px;overflow:hidden}.source-viewer>div{display:flex;align-items:center;justify-content:space-between;padding:11px 15px;border-bottom:1px solid var(--line);font-size:10px}.source-viewer iframe{display:block;width:100%;height:720px;border:0;background:#e9eeeb}.source-download{margin-top:16px}.score-scale{background:conic-gradient(var(--gold) var(--p),#edf1ef 0)!important}.score-scale strong{font-size:32px}.score-scale small{display:block;font-family:"Be Vietnam Pro",sans-serif;font-size:12px;color:var(--muted)}.score-grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.class-checks{grid-template-columns:repeat(2,1fr)}.source-viewer iframe{height:560px}.score-grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.track-options,.matching-editor{grid-template-columns:1fr}.class-checks{grid-template-columns:1fr}.program-title{align-items:flex-start;flex-direction:column}.source-viewer iframe{height:460px}.match-row{grid-template-columns:1fr}.score-grid-4{grid-template-columns:1fr}}

/* V6.1 - Tương thích Safari trên macOS/iPhone/iPad */
/* Safari áp dụng width:100% cho checkbox từ quy tắc .field input; ép lại kích thước thật. */
input[type="checkbox"],
input[type="radio"]{
  width:16px !important;
  min-width:16px !important;
  max-width:16px !important;
  height:16px !important;
  min-height:16px !important;
  padding:0 !important;
  margin:0;
  flex:0 0 16px;
  -webkit-appearance:auto;
  appearance:auto;
  accent-color:var(--forest-700);
}

/* Dùng grid thay cho flex để Safari không ép phần chữ thành một cột rất hẹp. */
.track-options>label{
  display:grid !important;
  grid-template-columns:18px minmax(0,1fr);
  align-items:start;
  column-gap:10px;
  width:100%;
  min-width:0;
}
.track-options>label>span{
  display:block;
  width:100%;
  min-width:0;
  overflow-wrap:normal;
  word-break:normal;
  white-space:normal;
}
.track-options>label>input{
  margin-top:2px !important;
  justify-self:start;
}
.track-options b{
  font-size:11px;
  line-height:1.35;
}
.track-options small{
  font-size:9px;
  line-height:1.45;
}

.class-checks label,
.license-confirm{
  min-width:0;
}
.class-checks label{
  display:grid;
  grid-template-columns:18px minmax(0,1fr);
  align-items:start;
  gap:8px;
}
.class-checks label span,
.license-confirm span{
  min-width:0;
  white-space:normal;
  word-break:normal;
}

/* Tránh các ô trong CSS Grid tràn hoặc bị Safari co sai chiều ngang. */
.form-grid{
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
}
.field,
.field.full,
.modal-body,
.track-options,
.class-checks{
  min-width:0;
}
.field input,
.field select,
.field textarea{
  min-width:0;
  max-width:100%;
}

/* Modal ổn định hơn trên Safari và iOS, kể cả khi thanh địa chỉ thay đổi chiều cao. */
.modal-wrap{
  overflow-y:auto;
  -webkit-overflow-scrolling:touch;
  padding:max(16px,env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) max(16px,env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left));
}
.modal{
  width:min(760px,calc(100vw - 32px));
  max-height:calc(100vh - 32px);
  max-height:calc(100dvh - 32px);
  -webkit-overflow-scrolling:touch;
  overscroll-behavior:contain;
}
.modal-head{
  position:sticky;
  top:0;
  z-index:4;
  background:var(--ivory-2);
}
.modal-foot{
  position:sticky;
  bottom:0;
  z-index:4;
  background:var(--ivory-2);
  padding-bottom:max(15px,env(safe-area-inset-bottom));
}
.modal-head [data-close]{
  width:36px;
  height:36px;
  min-width:36px;
  padding:0;
  display:grid;
  place-items:center;
  font-size:20px;
  line-height:1;
}

/* Điều khiển form bản địa của Safari. */
select,
input[type="date"],
input[type="email"],
input[type="tel"],
input[type="password"],
input[type="text"]{
  min-height:40px;
}
input[type="date"]{
  color-scheme:light;
  -webkit-appearance:none;
  appearance:none;
  background:#fff;
}
input[type="date"]::-webkit-date-and-time-value{
  text-align:left;
}

@media (hover:none) and (pointer:coarse){
  /* iOS tự phóng trang khi font input nhỏ hơn 16px. */
  .input,select,textarea,
  .field input,.field select,.field textarea{
    font-size:16px !important;
  }
  .field label{font-size:12px;}
  .sub,.notice{font-size:11px;}
  .btn{font-size:13px;min-height:42px;}
}

@media(max-width:700px){
  .modal-wrap{place-items:start center;}
  .modal{width:100%;border-radius:17px;}
  .modal-body{padding:18px;}
  .form-grid{grid-template-columns:1fr;gap:10px;}
  .field.full{grid-column:auto;}
  .track-options{grid-template-columns:1fr;}
  .track-options>label{min-height:68px;}
}