/* MIA ICT — IGCSE ICT LMS (same design language as the MIA IT Inventory System) */
:root{--bg:#f4f7fb;--surface:#fff;--soft:#f8fafc;--text:#111827;--muted:#6b7280;--border:#e5e7eb;--primary:#e91e88;--primary-dark:#c2186f;--danger:#dc2626;--success:#059669;--warning:#d97706;--purple:#7c3aed;--cyan:#0891b2;--nav:#0f172a;--shadow:0 10px 30px rgba(15,23,42,.08);--radius:18px;--tab-h:62px}
body.dark{--bg:#0f172a;--surface:#1e293b;--soft:#273449;--text:#e5e7eb;--muted:#94a3b8;--border:#334155;--nav:#0b1220;--shadow:0 10px 30px rgba(0,0,0,.45)}
*{box-sizing:border-box}
html,body{overflow-x:clip}
body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:var(--bg);transition:background .2s}
body.gated{overflow:hidden}
button,input,select,textarea{font-family:inherit;font-size:.95rem}
button{border:0;background:var(--primary);color:#fff;padding:.65rem 1rem;border-radius:12px;font-weight:700;cursor:pointer;transition:.15s}
button:hover{background:var(--primary-dark);transform:translateY(-1px)}
button:disabled{opacity:.6;cursor:not-allowed;transform:none}
.btn-secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}
.btn-secondary:hover{background:var(--soft);color:var(--text)}
.danger{background:var(--danger)}.danger:hover{background:#b91c1c}
.btn-sm{padding:.4rem .7rem;font-size:.8rem;border-radius:9px}
.icon-btn{background:transparent;color:var(--text);border:1px solid var(--border);width:38px;height:38px;padding:0;font-size:1.1rem;display:inline-flex;align-items:center;justify-content:center}
.icon-btn:hover{background:var(--soft);color:var(--text)}
input,select,textarea{border:1px solid var(--border);border-radius:12px;padding:.65rem .75rem;background:var(--surface);color:var(--text);outline:none;width:100%}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(233,30,136,.12)}
input[type=checkbox],input[type=radio]{width:auto;accent-color:var(--primary)}
code{background:var(--soft);border:1px solid var(--border);border-radius:6px;padding:.05rem .35rem;font-size:.85em}
.code,pre.code{font-family:Consolas,'Courier New',monospace;font-size:.86rem;line-height:1.45;white-space:pre;tab-size:2}
pre.code{background:#0f172a;color:#e2e8f0;padding:.8rem;border-radius:10px;overflow:auto;white-space:pre-wrap}
.muted{color:var(--muted)}.hint{color:var(--muted);font-size:.82rem;line-height:1.4}

/* ---------- Login gate ---------- */
.login-gate{display:none;position:fixed;inset:0;z-index:4000;align-items:center;justify-content:center;padding:1.2rem;background:linear-gradient(135deg,#0f172a,#3b0a2a)}
.login-gate.show{display:flex}
.login-card{width:100%;max-width:390px;background:var(--surface);border-radius:22px;padding:2.2rem 1.8rem;text-align:center;box-shadow:0 30px 80px rgba(0,0,0,.45)}
.login-logo{width:84px;height:84px;object-fit:contain;border-radius:18px;background:#fff;padding:6px;box-shadow:0 4px 14px rgba(0,0,0,.15)}
.login-card h1{margin:.8rem 0 .1rem;font-size:1.6rem;color:var(--primary)}
.login-sub{color:var(--muted);margin:0 0 1.3rem;font-size:.9rem}
#login-form{display:flex;flex-direction:column;gap:.7rem}
.remember{display:flex;align-items:center;gap:.5rem;font-size:.85rem;color:var(--muted);text-align:left}
.lg-error{margin-top:.9rem;padding:.6rem;border-radius:10px;background:#fee2e2;color:#991b1b;font-weight:700;font-size:.85rem}
.login-note{font-size:.75rem;color:var(--muted);margin:1rem 0 0}

/* ---------- Shell ---------- */
.sidebar{position:fixed;top:0;left:0;width:260px;height:100vh;background:var(--nav);color:#fff;padding:1.1rem;display:flex;flex-direction:column;z-index:100;overflow-y:auto;transition:width .2s,transform .25s}
.brand{display:flex;gap:.8rem;align-items:center;margin-bottom:1.2rem;cursor:pointer;border-radius:12px;padding:.3rem}
.brand:hover{background:rgba(255,255,255,.06)}
.brand-logo{width:52px;height:52px;border-radius:14px;background:#fff;padding:4px;object-fit:contain;flex:0 0 auto}
.brand h1{margin:0;font-size:1.15rem;color:#fff}.brand p{margin:.15rem 0 0;color:#cbd5e1;font-size:.78rem}
.nav-menu{display:grid;gap:.25rem}
.nav-link{display:flex;align-items:center;gap:.65rem;width:100%;text-align:left;background:transparent;color:#cbd5e1;border-radius:12px;padding:.55rem .75rem;font-weight:700}
.nav-link:hover{background:rgba(255,255,255,.08);color:#fff;transform:none}
.nav-link.active{background:rgba(233,30,136,.28);color:#fff}
.nav-ico{width:1.5em;text-align:center;font-size:1.05rem}
.sidebar-footer{margin-top:auto;padding-top:1rem;display:grid;gap:.5rem}
.me-chip{display:flex;gap:.6rem;align-items:center;background:rgba(255,255,255,.06);border-radius:12px;padding:.55rem}
.me-chip strong{display:block;font-size:.9rem}.me-chip small{color:#94a3b8}
.points-chip{background:rgba(233,30,136,.2);border:1px solid rgba(233,30,136,.4);border-radius:12px;padding:.5rem;text-align:center;font-weight:800}
.avatar{width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:800;flex:0 0 auto}
.avatar.big{width:72px;height:72px;font-size:2rem}
.main-area{margin-left:260px;padding:1.4rem;min-width:0;transition:margin-left .2s}
body.sidebar-rail .sidebar{width:76px}
body.sidebar-rail .main-area{margin-left:76px}
body.sidebar-rail .brand-text,body.sidebar-rail .nav-label,body.sidebar-rail .sidebar-footer{display:none}
body.sidebar-rail .nav-link,body.sidebar-rail .brand{justify-content:center}
body.sidebar-rail .nav-ico{font-size:1.3rem}
.topbar{position:sticky;top:0;z-index:90;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.8rem 1rem;box-shadow:var(--shadow);display:flex;align-items:center;gap:1rem;margin-bottom:1.2rem}
.topbar-brand{display:none}
.topbar-title{flex:1;min-width:0}
.topbar-title h2{margin:0;font-size:1.3rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-title p{margin:.15rem 0 0;color:var(--muted);font-size:.85rem}
.topbar-tools{display:flex;gap:.5rem;align-items:center}
.active-indicator{font-size:.8rem;font-weight:800;color:var(--success);background:rgba(5,150,105,.1);border-radius:999px;padding:.3rem .65rem;white-space:nowrap}
.active-indicator.idle{color:var(--muted);background:var(--soft)}

/* ---------- Components ---------- */
.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:1rem;margin-bottom:1.2rem}
.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;box-shadow:var(--shadow);position:relative;overflow:hidden;border-top:4px solid var(--border)}
.stat-card span{color:var(--muted);font-weight:700;font-size:.8rem}
.stat-card strong{display:block;margin-top:.4rem;font-size:1.7rem}
.stat-card.pink{border-top-color:var(--primary)}.stat-card.green{border-top-color:var(--success)}.stat-card.amber{border-top-color:var(--warning)}.stat-card.cyan{border-top-color:var(--cyan)}.stat-card.purple{border-top-color:var(--purple)}.stat-card.red{border-top-color:var(--danger)}
.panels{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;margin-bottom:1.2rem}
.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1rem 1.1rem;box-shadow:var(--shadow);margin-bottom:1.2rem;min-width:0}
.panels .panel{margin-bottom:0}
.panel h3{margin:0 0 .8rem;font-size:1.02rem}
.section-h{margin:1.4rem 0 .7rem}
.toolbar{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center;margin-bottom:1rem}
.toolbar select{width:auto;min-width:180px}
.empty{padding:2rem;text-align:center;color:var(--muted);font-weight:700;background:var(--surface);border:1px dashed var(--border);border-radius:14px}
.empty.big{font-size:1.2rem;line-height:2}
.todo{display:flex;align-items:center;gap:.6rem;padding:.6rem 0;border-bottom:1px solid var(--border)}
.todo:last-child{border-bottom:0}
.todo>div{flex:1;min-width:0}.todo strong{display:block}.todo small{color:var(--muted)}
.quick{display:grid;grid-template-columns:1fr 1fr;gap:.5rem}
.badge{display:inline-flex;align-items:center;border-radius:999px;padding:.22rem .6rem;font-size:.74rem;font-weight:800;background:var(--soft);color:var(--text);border:1px solid var(--border);white-space:nowrap}
.badge.ok{background:#dcfce7;color:#065f46;border-color:#bbf7d0}.badge.warn{background:#fef3c7;color:#92400e;border-color:#fde68a}.badge.bad{background:#fee2e2;color:#991b1b;border-color:#fecaca}.badge.info{background:#dbeafe;color:#1d4ed8;border-color:#bfdbfe}
body.dark .badge.ok{background:#14532d;color:#bbf7d0}body.dark .badge.warn{background:#78350f;color:#fde68a}body.dark .badge.bad{background:#7f1d1d;color:#fecaca}body.dark .badge.info{background:#1e3a8a;color:#bfdbfe}
.bar{flex:1;height:10px;background:var(--soft);border:1px solid var(--border);border-radius:999px;overflow:hidden;min-width:60px}
.bar.big{height:16px}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),#f472b6);border-radius:999px;transition:width .3s}
.bar i.bad{background:linear-gradient(90deg,#dc2626,#f87171)}
.bar-row{display:flex;align-items:center;gap:.7rem;padding:.45rem 0;cursor:default;flex-wrap:wrap}
.bar-row>span{width:180px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:700}
.bar-row[onclick]{cursor:pointer}
.row-actions{display:flex;gap:.35rem;flex-wrap:wrap;margin-left:auto}

/* tables */
.table-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:auto;box-shadow:var(--shadow);margin-bottom:1.2rem}
table{width:100%;border-collapse:collapse}
th,td{padding:.75rem .85rem;border-bottom:1px solid var(--border);text-align:left;vertical-align:middle;font-size:.9rem}
th{background:var(--soft);color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.04em}
tbody tr:hover{background:rgba(233,30,136,.04)}

/* class / deck cards */
.class-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:1rem;margin-bottom:1rem}
.class-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:1rem;box-shadow:var(--shadow);cursor:pointer;display:grid;gap:.35rem;transition:.15s}
.class-card:hover{border-color:var(--primary);transform:translateY(-2px)}
.class-card.sel{border:2px solid var(--primary)}
.class-card h4{margin:0}.class-card small{color:var(--muted)}

/* videos */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem}
.video-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}
.thumb{position:relative;cursor:pointer;aspect-ratio:16/9;background:#000}
.thumb img{width:100%;height:100%;object-fit:cover;display:block}
.thumb span{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:2.4rem;color:#fff;background:rgba(0,0,0,.25)}
.vc-body{padding:.8rem;display:grid;gap:.35rem}.vc-body small{color:var(--muted)}
.player-wrap{position:relative;aspect-ratio:16/9;background:#000;border-radius:var(--radius);overflow:hidden;margin:1rem 0}
.player-wrap iframe,#yt-holder{position:absolute;inset:0;width:100%;height:100%}
.watch-meta{display:flex;justify-content:space-between;margin-bottom:.5rem}

/* quiz */
.q-card{background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--primary);border-radius:14px;padding:1rem;margin-bottom:1rem;box-shadow:var(--shadow)}
.q-head{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;margin-bottom:.4rem}
.q-prompt{font-size:1rem;line-height:1.5;white-space:pre-wrap}
.opt{display:flex;gap:.6rem;align-items:center;padding:.6rem .8rem;border:1px solid var(--border);border-radius:10px;margin:.4rem 0;cursor:pointer}
.opt:hover{border-color:var(--primary)}
.match-row{display:grid;grid-template-columns:1fr 1.4fr;gap:.6rem;align-items:center;margin:.4rem 0}
.match-row span{font-weight:700}
.cw-tip{background:rgba(124,58,237,.08);border:1px solid rgba(124,58,237,.25);border-radius:10px;padding:.5rem .7rem;font-size:.85rem;margin-bottom:.5rem}
.quiz-bar{position:sticky;top:90px;z-index:50;display:flex;justify-content:space-between;align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:.5rem .8rem;margin-bottom:1rem;font-weight:700}
.answer{background:var(--soft);border:1px solid var(--border);border-radius:10px;padding:.7rem;white-space:pre-wrap;line-height:1.45}
.fb{margin-top:.5rem;padding:.55rem .7rem;border-radius:10px;background:rgba(8,145,178,.08);border:1px solid rgba(8,145,178,.25);font-size:.9rem}
.fb.tip{background:rgba(217,119,6,.08);border-color:rgba(217,119,6,.3)}
.teacher-note{border-left:4px solid var(--success)}
label.inline{display:flex;align-items:center;gap:.5rem;margin-top:.6rem;font-weight:700;font-size:.85rem}
label.inline input{width:90px}

/* flashcards */
.fc-wrap{max-width:620px;margin:0 auto;text-align:center}
.fc-progress{color:var(--muted);font-weight:700;margin-bottom:.8rem}
.flashcard{perspective:1200px;height:300px;cursor:pointer;margin-bottom:1rem}
.fc-inner{position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.flashcard.flip .fc-inner{transform:rotateY(180deg)}
.fc-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:22px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:1.5rem;box-shadow:var(--shadow);gap:.6rem}
.fc-face div{font-size:1.4rem;font-weight:800;line-height:1.4;word-break:break-word}
.fc-face.front{background:linear-gradient(135deg,var(--primary),var(--purple));color:#fff}
.fc-face.front small,.fc-face.front em{opacity:.85}
.fc-face.back{background:var(--surface);border:2px solid var(--primary);transform:rotateY(180deg)}
.fc-face.back div{font-size:1.1rem;font-weight:600}
.fc-actions{display:flex;gap:.5rem;justify-content:center;flex-wrap:wrap;margin-bottom:.6rem}

/* practical lab */
.brief{border-left:4px solid var(--cyan)}
.lab{display:grid;grid-template-columns:1fr 1fr 320px;gap:1rem;align-items:start}
.lab.no-web{grid-template-columns:1fr}
.editor,.preview-pane{background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}
.tabs{display:flex;align-items:center;gap:.4rem;padding:.4rem;border-bottom:1px solid var(--border);background:var(--soft);font-size:.8rem}
.tab{background:transparent;color:var(--muted);padding:.4rem .7rem;border-radius:8px}
.tab.active{background:var(--surface);color:var(--primary);border:1px solid var(--border)}
.tab:hover{transform:none;background:var(--surface);color:var(--text)}
.editor textarea{border:0;border-radius:0;height:520px;resize:vertical;background:#0f172a;color:#e2e8f0}
.preview{width:100%;height:520px;border:0;background:#fff;display:block}
.panel .preview{height:420px;border:1px solid var(--border);border-radius:10px}
.checklist{position:sticky;top:100px;margin:0}
.check-row{display:flex;align-items:flex-start;gap:.5rem;padding:.55rem .6rem;border:1px solid var(--border);border-radius:10px;margin:.35rem 0;font-size:.88rem;cursor:pointer}
.check-row span{flex:1}.check-row small{color:var(--muted);font-weight:800}
.check-row.done{background:rgba(5,150,105,.1);border-color:rgba(5,150,105,.4)}
.score-line{margin:.8rem 0;font-weight:700;text-align:center}

/* AI tutor */
.chat-wrap{max-width:860px;margin:0 auto}
.chat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;height:58vh;overflow-y:auto;display:flex;flex-direction:column;gap:.7rem;box-shadow:var(--shadow)}
.msg{max-width:85%;padding:.7rem .9rem;border-radius:14px;line-height:1.5;font-size:.93rem;word-wrap:break-word}
.msg.user{align-self:flex-end;background:var(--primary);color:#fff;border-bottom-right-radius:4px}
.msg.bot{align-self:flex-start;background:var(--soft);border:1px solid var(--border);border-bottom-left-radius:4px}
.msg.typing{opacity:.7;font-style:italic}
.chat-form{display:flex;gap:.5rem;margin-top:.7rem}
.chat-form textarea{resize:none}
.chips{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.6rem}
.me-big{display:flex;gap:1rem;align-items:center;margin-bottom:1rem}
.me-big h3{margin:0}

/* modal + forms */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(15,23,42,.55);z-index:3000;align-items:center;justify-content:center;padding:1rem}
.modal-overlay.show{display:flex}
.modal-content{width:100%;max-width:640px;max-height:92vh;overflow:auto;background:var(--surface);border-radius:20px;padding:1.2rem;box-shadow:0 24px 70px rgba(15,23,42,.3)}
.modal-content.wide{max-width:920px}
.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}
.modal-header h2{margin:0;font-size:1.2rem}
.modal-actions{display:flex;justify-content:flex-end;gap:.6rem;margin-top:1rem}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:.85rem}
.form-grid label{display:grid;gap:.35rem;font-weight:800;font-size:.83rem}
.form-grid .full{grid-column:1/-1}
.multi{display:flex;flex-wrap:wrap;gap:.4rem;max-height:180px;overflow:auto;border:1px solid var(--border);border-radius:12px;padding:.5rem;font-weight:600}
.multi label{display:flex;align-items:center;gap:.35rem;background:var(--soft);border:1px solid var(--border);border-radius:999px;padding:.3rem .65rem;font-size:.82rem}

.global-loader{display:none;position:fixed;inset:0;z-index:4500;background:rgba(15,23,42,.32);align-items:center;justify-content:center}
.global-loader.show{display:flex}
.loader-card{background:var(--surface);border-radius:var(--radius);padding:1rem 1.3rem;display:flex;gap:.8rem;align-items:center;box-shadow:var(--shadow)}
.spinner{width:24px;height:24px;border:3px solid #f3c1dc;border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.toast{visibility:hidden;position:fixed;z-index:5000;top:18px;left:50%;transform:translateX(-50%);background:var(--success);color:#fff;padding:.75rem 1rem;border-radius:14px;font-weight:800;max-width:calc(100% - 32px);box-shadow:var(--shadow)}
.toast.show{visibility:visible}.toast.err{background:var(--danger)}
.mtabbar,.nav-backdrop{display:none}

/* ---------- Responsive ---------- */
@media(max-width:1200px){.lab{grid-template-columns:1fr 1fr}.checklist{grid-column:1/-1;position:static}}
@media(max-width:1024px){.panels{grid-template-columns:1fr}}
@media(max-width:860px){
  .sidebar{transform:translateX(-100%);width:270px;z-index:2600;box-shadow:24px 0 60px rgba(0,0,0,.35)}
  body.nav-open .sidebar{transform:none}
  body.nav-open .nav-backdrop{display:block;position:fixed;inset:0;background:rgba(15,23,42,.5);z-index:2500}
  .main-area,body.sidebar-rail .main-area{margin-left:0;padding:.8rem .8rem calc(var(--tab-h) + 20px)}
  #nav-toggle{display:none}
  .topbar{border-radius:0 0 18px 18px;margin:-.8rem -.8rem 1rem;flex-wrap:wrap;gap:.4rem}
  .topbar-brand{display:flex;align-items:center;gap:.5rem;font-weight:800;color:var(--primary);font-size:1.1rem}
  .topbar-logo{width:34px;height:34px;border-radius:9px;background:#fff;padding:2px}
  .topbar-tools{margin-left:auto}
  .topbar-title{flex:1 1 100%;order:3;border-top:1px solid var(--border);padding-top:.4rem}
  .topbar-title h2{font-size:1.1rem}
  .mtabbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:2400;height:calc(var(--tab-h) + env(safe-area-inset-bottom,0px));padding-bottom:env(safe-area-inset-bottom,0px);background:var(--surface);border-top:1px solid var(--border);box-shadow:0 -6px 24px rgba(15,23,42,.1)}
  .mtab{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;background:transparent;color:var(--muted);border-radius:0;padding:4px;font-size:1.2rem}
  .mtab small{font-size:.66rem;font-weight:700}
  .mtab.active{color:var(--primary)}
  .mtab:hover{background:transparent;transform:none;color:var(--primary)}
  body.gated .mtabbar{display:none}
  .form-grid{grid-template-columns:1fr}
  .lab{grid-template-columns:1fr}
  .editor textarea,.preview{height:340px}
  .quiz-bar{top:120px}
  .bar-row>span{width:100%}
  .modal-overlay{align-items:flex-end;padding:0}
  .modal-content{border-radius:20px 20px 0 0;max-height:94vh}
  /* tables → cards */
  .table-card{background:transparent;border:0;box-shadow:none}
  .table-card thead{display:none}
  .table-card tr{display:block;background:var(--surface);border:1px solid var(--border);border-radius:14px;margin-bottom:.8rem;padding:.3rem .8rem;box-shadow:var(--shadow)}
  .table-card td{display:flex;justify-content:space-between;align-items:center;gap:1rem;text-align:right;padding:.5rem 0}
  .table-card td:last-child{border-bottom:0}
  .table-card td::before{content:attr(data-label);font-weight:800;font-size:.68rem;text-transform:uppercase;color:var(--muted);text-align:left;flex:0 0 38%}
  .table-card td[data-label=""]::before{display:none}
  .row-actions{justify-content:flex-end}
  .flashcard{height:260px}
}
@media(max-width:480px){.dashboard-grid{grid-template-columns:1fr 1fr}.stat-card strong{font-size:1.3rem}.quick{grid-template-columns:1fr}.active-indicator{display:none}}
@media print{.sidebar,.topbar,.toolbar,.mtabbar,button{display:none!important}.main-area{margin:0}}