/* ============================================================
   HMG Academy — Data Science Learning Platform
   ENTERPRISE EDITION — Ultimate Multi-Page Stylesheet
   Part of the HMG Academy Ecosystem
   Built by Adewale Samson Adeagbo
   ============================================================ */
:root{--p:#1a56db;--pd:#1e40af;--pl:#dbeafe;--s:#059669;--sl:#d1fae5;--a:#d97706;--al:#fef3c7;--bg:#f8fafc;--surf:#ffffff;--surf2:#f1f5f9;--bd:#e2e8f0;--bdl:#f1f5f9;--tx:#0f172a;--tx2:#475569;--tx3:#94a3b8;--txi:#ffffff;--ok:#16a34a;--warn:#d97706;--err:#dc2626;--ff:'Segoe UI',system-ui,-apple-system,sans-serif;--fm:'Cascadia Code','Fira Code','Consolas',monospace;--sh1:0 1px 2px rgba(0,0,0,0.05);--sh2:0 4px 6px -1px rgba(0,0,0,0.1);--sh3:0 10px 15px -3px rgba(0,0,0,0.1);--r1:6px;--r2:10px;--r3:16px;--r4:24px;--sw:280px;--hh:64px;--tr:0.2s ease;--fsm:1.0}
body.dark-mode{--bg:#0f172a;--surf:#1e293b;--surf2:#334155;--bd:#334155;--bdl:#1e293b;--tx:#f1f5f9;--tx2:#cbd5e1;--tx3:#64748b;--pl:#1e3a5f}
body.focus-mode .topnav,body.focus-mode .sidebar,body.focus-mode .footer,body.focus-mode .lesson-nav,body.focus-mode .notes-panel{display:none!important}
body.focus-mode .main-wrap{margin-left:0!important}
body.focus-mode .content{max-width:780px!important;margin:0 auto!important;padding:1.5rem!important}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--ff);color:var(--tx);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;transition:background 0.3s,color 0.3s;font-size:calc(1rem*var(--fsm));display:flex;flex-direction:column;min-height:100vh}
a{color:var(--p);text-decoration:none}a:hover{color:var(--pd)}
code{font-family:var(--fm);font-size:.875em;background:var(--surf2);padding:.15em .4em;border-radius:4px;color:var(--pd)}
pre{background:#1e293b;color:#e2e8f0;padding:1.1rem;border-radius:var(--r2);overflow-x:auto;font-family:var(--fm);font-size:.85rem;line-height:1.6;margin:.85rem 0;border:1px solid #334155;position:relative}
pre code{background:none;color:inherit;padding:0}
pre .copy-btn{position:absolute;top:.4rem;right:.4rem;background:rgba(255,255,255,.1);color:#fff;border:none;padding:.2rem .5rem;border-radius:4px;font-size:.65rem;cursor:pointer;opacity:0;transition:opacity .2s}
pre:hover .copy-btn,pre .copy-btn.copied{opacity:1}
table{width:100%;border-collapse:collapse;margin:.85rem 0;font-size:.88rem}
th,td{border:1px solid var(--bd);padding:.5rem .75rem;text-align:left}
th{background:var(--p);color:var(--txi);font-weight:600;font-size:.82rem;text-transform:uppercase;letter-spacing:.5px}
tr:nth-child(even){background:var(--surf2)}
h1,h2,h3,h4{line-height:1.3;color:var(--tx);margin-top:1.4em;margin-bottom:.4em}
h1{font-size:1.85rem;font-weight:800}h2{font-size:1.35rem;font-weight:700;border-bottom:2px solid var(--bd);padding-bottom:.3rem}
h3{font-size:1.15rem;font-weight:600}h4{font-size:1rem;font-weight:600}

/* NAV */
.topnav{background:var(--surf);border-bottom:2px solid var(--bd);position:sticky;top:0;z-index:100;box-shadow:var(--sh1)}
.topnav-inner{max-width:1300px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 1.5rem;height:var(--hh)}
.topnav-brand{display:flex;align-items:center;gap:.6rem}
.logo-placeholder{display:flex;align-items:center;justify-content:center;gap:.5rem;padding:.25rem}
.logo-placeholder .logo-img{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--p),var(--s));display:flex;align-items:center;justify-content:center;font-size:1.2rem;color:#fff;font-weight:800;flex-shrink:0}
.topnav-brand .brand-badge{display:inline-block;background:var(--p);color:#fff;font-size:.55rem;padding:.1rem .45rem;border-radius:10px;font-weight:600;margin-left:.5rem}
.topnav-links{display:flex;align-items:center;gap:.15rem;flex-wrap:wrap}
.topnav-links a{padding:.4rem .75rem;border-radius:var(--r1);font-size:.82rem;font-weight:500;color:var(--tx2);transition:all var(--tr);white-space:nowrap}
.topnav-links a:hover,.topnav-links a.active{background:var(--pl);color:var(--p)}
.topnav-links .nav-sep{width:1px;height:20px;background:var(--bd);margin:0 .25rem;display:inline-block}
.topnav-actions{display:flex;align-items:center;gap:.3rem}
.topnav-actions button{background:none;border:1.5px solid var(--bd);padding:.28rem .5rem;border-radius:var(--r1);cursor:pointer;font-size:.8rem;transition:all var(--tr);color:var(--tx2)}
.topnav-actions button:hover{border-color:var(--p);color:var(--p);background:var(--pl)}
.topnav-actions button.active{background:var(--pl);border-color:var(--p);color:var(--p)}
.topnav-mob{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--tx)}
.topnav-search{position:relative}
.topnav-search input{padding:.35rem .6rem .35rem 1.7rem;border:2px solid var(--bd);border-radius:var(--r4);font-size:.8rem;width:200px;transition:all var(--tr);background:var(--surf2);color:var(--tx)}
.topnav-search input:focus{outline:none;border-color:var(--p);background:var(--surf);width:280px}
.topnav-search .sicon{position:absolute;left:.5rem;top:50%;transform:translateY(-50%);color:var(--tx3);font-size:.7rem;pointer-events:none}

/* LAYOUT */
.main-wrap{display:flex;flex:1}
.sidebar{width:var(--sw);min-height:calc(100vh - var(--hh));background:linear-gradient(180deg,#0f172a,#1e293b);color:var(--txi);flex-shrink:0;overflow-y:auto;transition:transform var(--tr);box-shadow:0 4px 20px rgba(0,0,0,.25);display:flex;flex-direction:column}
.sidebar-brand{padding:1rem 1rem .75rem;border-bottom:1px solid rgba(255,255,255,.08);text-align:center}
.sidebar-nav{flex:1;padding:.5rem 0;overflow-y:auto}
.sidebar-nav .ns{padding:.3rem 1.1rem;font-size:.6rem;text-transform:uppercase;letter-spacing:1.3px;color:rgba(255,255,255,.25);font-weight:700;margin-top:.3rem}
.sidebar-nav a{display:flex;align-items:center;gap:.4rem;padding:.4rem 1.1rem;color:rgba(255,255,255,.58);font-size:.8rem;text-decoration:none;transition:all var(--tr);border-left:3px solid transparent}
.sidebar-nav a:hover{background:rgba(255,255,255,.04);color:#fff;border-left-color:rgba(255,255,255,.18)}
.sidebar-nav a.active{background:rgba(37,99,235,.2);color:#fff;border-left-color:var(--p);font-weight:600}
.sidebar-nav a .ni{font-size:.9rem;width:18px;text-align:center;flex-shrink:0}
.sidebar-footer{padding:.6rem 1.1rem;border-top:1px solid rgba(255,255,255,.06);font-size:.65rem;color:rgba(255,255,255,.28);text-align:center;flex-shrink:0}
.sidebar-footer a{color:rgba(255,255,255,.4)}
.content{flex:1;padding:1.75rem;max-width:1000px;width:100%;margin:0 auto}
.page-standalone{max-width:1000px;margin:0 auto;padding:2rem;width:100%;flex:1}

/* CARDS */
.dash-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:.75rem;margin-bottom:1.5rem}
.stat-card{background:var(--surf);border-radius:var(--r2);padding:1rem;box-shadow:var(--sh1);border:1px solid var(--bd);transition:all var(--tr)}
.stat-card:hover{box-shadow:var(--sh2);transform:translateY(-2px)}
.stat-card .si{font-size:1.3rem;margin-bottom:.25rem}.stat-card .sv{font-size:1.3rem;font-weight:800;color:var(--p)}.stat-card .sl{font-size:.7rem;color:var(--tx2)}
.mod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:.75rem}
.mod-card{background:var(--surf);border-radius:var(--r3);padding:1rem;border:1px solid var(--bd);cursor:pointer;transition:all var(--tr);box-shadow:var(--sh1);position:relative;overflow:hidden}
.mod-card:hover{box-shadow:var(--sh3);transform:translateY(-3px);border-color:var(--p)}
.mod-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--p),var(--s))}
.mod-card .ml{display:inline-block;font-size:.58rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;padding:.1rem .4rem;border-radius:8px;margin-bottom:.4rem}
.ml-f{background:#dbeafe;color:#1e40af}.ml-i{background:#d1fae5;color:#065f46}.ml-a{background:#fef3c7;color:#92400e}.ml-e{background:#fce7f3;color:#9d174d}
.mod-card .mi{font-size:1.5rem;margin-bottom:.25rem}.mod-card .mt{font-size:.95rem;font-weight:700;margin-bottom:.25rem}
.mod-card .md{font-size:.75rem;color:var(--tx2);margin-bottom:.5rem;line-height:1.4}
.mod-card .mm{display:flex;gap:.5rem;font-size:.68rem;color:var(--tx3);flex-wrap:wrap}
.pt{height:4px;background:var(--bdl);border-radius:2px;overflow:hidden}
.pf{height:100%;background:linear-gradient(90deg,var(--p),var(--s));border-radius:2px;transition:width .4s ease}

/* LESSON */
.lesson-hdr{margin-bottom:1.25rem}.lesson-hdr .lbc{font-size:.75rem;color:var(--tx3);margin-bottom:.25rem}
.lesson-hdr h1{font-size:1.7rem;margin:0}
.lesson-meta{display:flex;gap:.5rem;flex-wrap:wrap;font-size:.75rem;color:var(--tx3);margin-top:.35rem;align-items:center}
.lesson-meta button{background:none;border:1px solid var(--bd);padding:.15rem .45rem;border-radius:10px;cursor:pointer;font-size:.68rem;color:var(--tx2);transition:all var(--tr)}
.lesson-meta button:hover{border-color:var(--p);color:var(--p);background:var(--pl)}
.lesson-meta button.bmd{border-color:var(--a);color:var(--a);background:var(--al)}
.lesson-obj{background:var(--pl);border-left:4px solid var(--p);padding:.75rem 1rem;border-radius:0 var(--r2) var(--r2) 0;margin-bottom:1.25rem}
.lesson-obj h3{margin-top:0;color:var(--pd);font-size:.9rem}
.lesson-obj ul{list-style:none;padding-left:0;font-size:.82rem}.lesson-obj li::before{content:'✓ ';color:var(--s);font-weight:bold}
.lesson-toc{background:var(--surf);border:1px solid var(--bd);border-radius:var(--r2);padding:.75rem 1rem;margin-bottom:1.25rem}
.lesson-toc h4{margin-top:0;font-size:.75rem;text-transform:uppercase;letter-spacing:.5px;color:var(--tx3)}
.lesson-toc a{display:block;font-size:.8rem;padding:.1rem 0;color:var(--p)}
.lesson-nav{display:flex;justify-content:space-between;align-items:center;margin-top:2rem;padding-top:1rem;border-top:1px solid var(--bd)}
.lesson-nav button{padding:.4rem .85rem;background:var(--p);color:#fff;border:none;border-radius:var(--r2);cursor:pointer;font-weight:600;font-size:.8rem;transition:all var(--tr)}
.lesson-nav button:hover{background:var(--pd);transform:translateY(-1px)}
.lesson-nav button:disabled{background:var(--bd);color:var(--tx3);cursor:not-allowed;transform:none}
.lesson-nav .lnext{background:var(--s)!important}

/* CONCEPT BOXES / PROCESS / QUIZ */
.cb{background:var(--surf2);border-left:4px solid var(--p);padding:.7rem .85rem;margin:.85rem 0;border-radius:0 var(--r1) var(--r1) 0;font-size:.86rem}
.cb h4{margin-top:0;color:var(--pd);font-size:.9rem}
.cb.hl{background:linear-gradient(135deg,#fffbeb,#fef3c7);border-left-color:var(--a)}
.cb.wn{background:#fef2f2;border-left-color:var(--err)}.cb.ok{background:#f0fdf4;border-left-color:var(--ok)}
.pflow{display:flex;align-items:center;gap:.25rem;flex-wrap:wrap;justify-content:center;margin:.85rem 0;padding:.5rem;background:var(--surf);border-radius:var(--r2);border:1px solid var(--bd)}
.pstep{text-align:center;padding:.35rem;background:var(--pl);border-radius:var(--r2);min-width:50px;font-size:.78rem}
.pstep .sn{display:inline-block;width:16px;height:16px;line-height:16px;background:var(--p);color:#fff;border-radius:50%;font-size:.58rem;font-weight:700;margin-bottom:.08rem}
.parrow{font-size:1rem;color:var(--tx3);font-weight:bold}
.quiz-wrap{background:var(--surf);border:2px solid var(--bd);border-radius:var(--r3);padding:1.25rem;margin-top:1.25rem}
.quiz-q{margin-bottom:1rem;padding-bottom:1rem;border-bottom:1px solid var(--bdl)}.quiz-q:last-child{border-bottom:none}
.quiz-q .qt{font-weight:600;margin-bottom:.45rem;font-size:.88rem}
.quiz-opts{display:flex;flex-direction:column;gap:.25rem}
.quiz-opt{display:flex;align-items:center;gap:.3rem;padding:.4rem .65rem;border:2px solid var(--bd);border-radius:var(--r2);cursor:pointer;transition:all var(--tr);font-size:.83rem}
.quiz-opt:hover{border-color:var(--p);background:var(--pl)}.quiz-opt.sel{border-color:var(--p);background:var(--pl);font-weight:600}
.quiz-opt.ok{border-color:var(--ok);background:#d1fae5}.quiz-opt.er{border-color:var(--err);background:#fef2f2}
.quiz-submit{padding:.45rem 1.1rem;background:var(--s);color:#fff;border:none;border-radius:var(--r2);font-size:.88rem;font-weight:600;cursor:pointer;margin-top:.5rem;transition:all var(--tr)}
.quiz-submit:hover{background:#047857}.quiz-submit:disabled{background:var(--bd);cursor:not-allowed}
.quiz-result{text-align:center;padding:1rem;margin-top:.5rem;border-radius:var(--r2);font-weight:700;font-size:.9rem}
.quiz-result.pass{background:#d1fae5;color:#065f46}.quiz-result.fail{background:#fef2f2;color:#991b1b}

/* EXERCISE / NOTES / BADGES / FAQ / MILESTONE */
.exercise-box{background:var(--surf);border:2px dashed var(--a);border-radius:var(--r3);padding:1.25rem;margin:1.25rem 0}
.exercise-box h4{margin-top:0;color:var(--a)}.exercise-box .ex-desc{font-size:.85rem;color:var(--tx2)}
.exercise-box .ex-hint{font-size:.75rem;color:var(--tx3);font-style:italic;margin-top:.5rem;display:none}
.exercise-box .ex-actions{display:flex;gap:.5rem;margin-top:.75rem}
.exercise-box .ex-actions button{padding:.3rem .7rem;border-radius:var(--r1);border:1px solid var(--bd);cursor:pointer;font-size:.75rem;background:var(--surf2);color:var(--tx)}
.exercise-box .ex-actions button:hover{border-color:var(--p);color:var(--p)}
.notes-panel{background:var(--surf);border:1px solid var(--bd);border-radius:var(--r2);padding:1rem;margin-top:1.25rem}
.notes-panel h3{margin-top:0;font-size:.9rem}.notes-panel textarea{width:100%;min-height:80px;padding:.45rem .5rem;border:1px solid var(--bd);border-radius:var(--r1);font-family:var(--ff);font-size:.8rem;resize:vertical;background:var(--surf2);color:var(--tx)}
.notes-actions{display:flex;gap:.35rem;margin-top:.35rem}.notes-actions button{padding:.25rem .55rem;border-radius:var(--r1);border:1px solid var(--bd);cursor:pointer;font-size:.72rem;background:var(--surf2);color:var(--tx)}
.notes-actions button:hover{border-color:var(--p);color:var(--p)}.notes-actions button.primary{background:var(--p);color:#fff;border-color:var(--p)}
.badges-wrap{display:flex;gap:.4rem;flex-wrap:wrap;margin:.75rem 0}
.badge-item{display:inline-flex;align-items:center;gap:.25rem;padding:.2rem .5rem;border-radius:16px;font-size:.7rem;font-weight:600;background:var(--surf2);border:1px solid var(--bd)}
.badge-item.earned{background:#d1fae5;border-color:var(--ok);color:#065f46}.badge-item.locked{opacity:.5}
.faq-item{border-bottom:1px solid var(--bd);padding:.75rem 0}
.faq-item .faq-q{font-weight:700;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:.95rem}
.faq-item .faq-q:hover{color:var(--p)}.faq-item .faq-a{display:none;padding-top:.5rem;font-size:.88rem;color:var(--tx2);line-height:1.6}
.faq-item.open .faq-a{display:block}
.milestone{text-align:center;padding:2rem;background:linear-gradient(135deg,var(--pl),var(--sl));border-radius:var(--r3);margin:1.5rem 0;border:2px solid var(--s);animation:popIn .5s ease}
.milestone h3{color:var(--s);font-size:1.3rem;margin:0}
@keyframes popIn{0%{transform:scale(.8);opacity:0}50%{transform:scale(1.05)}100%{transform:scale(1);opacity:1}}

/* TIMER & GOALS */
.timer-widget{background:var(--surf);border:2px solid var(--bd);border-radius:var(--r3);padding:1rem;text-align:center;margin-bottom:1.5rem}
.timer-widget .timer-display{font-size:2.5rem;font-weight:800;font-family:var(--fm);color:var(--p);margin:.5rem 0}
.timer-widget .timer-label{font-size:.75rem;color:var(--tx3);text-transform:uppercase;letter-spacing:1px}
.timer-widget .timer-actions{display:flex;gap:.5rem;justify-content:center;margin-top:.75rem}
.timer-widget .timer-actions button{padding:.3rem .8rem;border-radius:var(--r1);border:1px solid var(--bd);cursor:pointer;font-size:.78rem;background:var(--surf2);color:var(--tx)}
.timer-widget .timer-actions button:hover{border-color:var(--p);color:var(--p)}.timer-widget .timer-actions button.primary{background:var(--p);color:#fff;border-color:var(--p)}
.goal-card{background:var(--surf);border:2px solid var(--bd);border-radius:var(--r3);padding:1rem;margin-bottom:1rem}
.goal-card h4{margin-top:0;display:flex;align-items:center;gap:.4rem;font-size:.9rem}
.goal-bar{height:8px;background:var(--surf2);border-radius:4px;overflow:hidden;margin:.5rem 0}
.goal-fill{height:100%;background:linear-gradient(90deg,var(--p),var(--s));border-radius:4px;transition:width .5s ease}

/* CHEAT / RESOURCES / PATH / ABOUT */
.cs-card{background:var(--surf);border:1px solid var(--bd);border-radius:var(--r3);padding:1rem;box-shadow:var(--sh1)}
.cs-card h3{margin-top:0;display:flex;align-items:center;gap:.3rem;font-size:.95rem}
.cs-sec{margin-bottom:.7rem}.cs-sec h4{font-size:.7rem;text-transform:uppercase;letter-spacing:.5px;color:var(--p);margin-bottom:.25rem;border-bottom:1px solid var(--bdl)}
.cs-sec code{display:block;margin-bottom:.08rem;font-size:.7rem}
.res-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:.5rem}
.res-item{display:flex;align-items:center;gap:.5rem;padding:.55rem .7rem;background:var(--surf);border:1px solid var(--bd);border-radius:var(--r2);text-decoration:none;color:var(--tx);transition:all var(--tr)}
.res-item:hover{box-shadow:var(--sh2);border-color:var(--p)}.res-item .rinfo{flex:1}
.res-item .rt{font-weight:600;font-size:.78rem;color:var(--p)}.res-item .rc{font-size:.6rem;color:var(--tx3);text-transform:uppercase}
.lp{position:relative;padding:.5rem 0}.lp .lpl{position:absolute;left:22px;top:0;bottom:0;width:3px;background:var(--bd);z-index:0}
.lp .lpn{position:relative;z-index:1;display:flex;align-items:flex-start;gap:.6rem;margin-bottom:.75rem}
.lp .lpn .lpd{width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:.65rem;font-weight:700;border:3px solid var(--bd);background:var(--surf)}
.lp .lpn.done .lpd{background:var(--ok);border-color:var(--ok);color:#fff}.lp .lpn.act .lpd{background:var(--p);border-color:var(--p);color:#fff}
.pd-mod{display:flex;align-items:center;gap:.6rem;padding:.5rem 0;border-bottom:1px solid var(--bdl)}.pd-mod:last-child{border:none}
.pd-mod .pm-icon{font-size:1.1rem;width:30px;text-align:center}.pd-mod .pm-info{flex:1}
.pd-mod .pm-name{font-weight:600;font-size:.82rem}.pd-mod .pm-detail{font-size:.68rem;color:var(--tx3)}.pd-mod .pm-bar{width:90px}
.about-sec{background:linear-gradient(135deg,#0f172a,#1e3a5f);color:#fff;border-radius:var(--r3);padding:2rem;margin-bottom:1.5rem}
.about-sec h2,.about-sec h3{color:#fff}.about-sec a{color:#93c5fd}
.founder-card{display:flex;gap:1rem;align-items:start;flex-wrap:wrap}
.founder-card .fa{width:70px;height:70px;border-radius:50%;background:linear-gradient(135deg,var(--p),var(--s));display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:#fff;font-weight:800;flex-shrink:0}
.founder-card .fi h3{margin-top:0}.founder-card .fl{display:flex;gap:.35rem;margin-top:.35rem;flex-wrap:wrap}
.founder-card .fl a{font-size:.68rem;padding:.15rem .45rem;background:rgba(255,255,255,.1);border-radius:12px;color:#fff}.founder-card .fl a:hover{background:rgba(255,255,255,.2)}
.bm-panel{background:var(--surf);border:1px solid var(--bd);border-radius:var(--r2);padding:1rem}
.bm-item{display:flex;justify-content:space-between;align-items:center;padding:.35rem 0;border-bottom:1px solid var(--bdl);cursor:pointer}
.bm-item:hover{color:var(--p)}.bm-item .bm-rm{color:var(--err);cursor:pointer;font-size:.7rem}

/* PROJECT CARDS */
.project-card{background:var(--surf);border:2px solid var(--bd);border-radius:var(--r2);padding:1rem;transition:all var(--tr);cursor:pointer}
.project-card:hover{border-color:var(--p);box-shadow:var(--sh2)}.project-card h4{margin-top:0}
.project-card .ptags{display:flex;gap:.3rem;flex-wrap:wrap;margin-top:.35rem}
.project-card .ptag{font-size:.6rem;padding:.1rem .4rem;background:var(--pl);color:var(--pd);border-radius:8px;font-weight:600}

/* MODALS / TOAST */
.cert-modal{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);display:none;align-items:center;justify-content:center;z-index:500}
.cert-modal.active{display:flex}
.cert-modal .cert{background:#fff;color:#0f172a;padding:2rem;border-radius:var(--r3);max-width:620px;width:90%;text-align:center;border:8px double #1a56db}
.cert h2{font-family:Georgia,serif;font-size:1.4rem;border:none}.cert .cn{font-size:1.15rem;font-weight:800;color:#1a56db;margin:.6rem 0}
.cert .cd{font-size:.82rem;color:#475569;max-width:400px;margin:0 auto}.cert .cbadge{font-size:3rem;margin:.6rem 0}
.cert .cf{font-size:.65rem;color:#64748b;margin-top:.6rem;border-top:1px solid #e2e8f0;padding-top:.6rem}
.cert .ca{margin-top:.6rem;display:flex;gap:.4rem;justify-content:center}
.cert .ca button{padding:.35rem .9rem;border-radius:var(--r2);border:none;cursor:pointer;font-weight:600;font-size:.75rem}
.cert .ca .btn-close{background:#e2e8f0;color:#0f172a}.cert .ca .btn-print{background:#1a56db;color:#fff}
.shortcuts-modal{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);display:none;align-items:center;justify-content:center;z-index:600}
.shortcuts-modal.active{display:flex}
.shortcuts-content{background:var(--surf);padding:1.5rem;border-radius:var(--r3);max-width:520px;width:90%}
.shortcuts-content kbd{background:var(--surf2);border:1px solid var(--bd);border-radius:3px;padding:.1rem .3rem;font-size:.72rem;font-family:var(--fm)}
.toast-container{position:fixed;bottom:1rem;right:1rem;z-index:1000;display:flex;flex-direction:column;gap:.35rem}
.toast{padding:.55rem .9rem;border-radius:var(--r2);color:#fff;font-weight:600;font-size:.75rem;box-shadow:var(--sh3);animation:slideIn .3s ease}
.toast.ok{background:var(--ok)}.toast.info{background:var(--p)}.toast.warn{background:var(--warn)}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
.search-drop{position:absolute;top:100%;left:0;right:0;background:var(--surf);border:1px solid var(--bd);border-radius:var(--r2);box-shadow:var(--sh3);max-height:350px;overflow-y:auto;display:none;z-index:200;margin-top:4px}
.search-drop.active{display:block}.search-drop .sr-item{padding:.45rem .8rem;cursor:pointer;border-bottom:1px solid var(--bdl)}
.search-drop .sr-item:hover{background:var(--pl)}.search-drop .sr-item .srt{font-weight:600;font-size:.8rem}
.search-drop .sr-none{padding:1rem;text-align:center;color:var(--tx3)}

/* FOOTER */
.footer{text-align:center;padding:1rem;color:var(--tx3);font-size:.7rem;border-top:1px solid var(--bd);margin-top:auto}
.footer a{color:var(--p)}.footer .fb{font-weight:700;color:var(--tx2);font-size:.8rem}

/* UTILITY */
.tc{text-align:center}.tm{color:var(--tx3)}.mt1{margin-top:.5rem}.mt2{margin-top:1rem}.mt3{margin-top:1.5rem}
.fade{animation:fadeIn .25s ease}@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.hidden{display:none!important}

/* RESPONSIVE */
@media(max-width:900px){.sidebar{position:fixed;transform:translateX(-100%);z-index:99;top:var(--hh);bottom:0}.sidebar.open{transform:translateX(0)}.content{padding:1rem}.topnav-links{display:none}.topnav-links.open{display:flex;flex-direction:column;position:absolute;top:var(--hh);left:0;right:0;background:var(--surf);border-bottom:2px solid var(--bd);padding:.5rem;z-index:98}.topnav-mob{display:block}.topnav-search input{width:130px}}
@media(max-width:500px){.topnav-search input{width:100px}.dash-grid,.mod-grid,.res-list{grid-template-columns:1fr}.pflow{flex-direction:column}.parrow{transform:rotate(90deg)}.timer-widget .timer-display{font-size:1.8rem}}
@media print{.topnav,.sidebar,.lesson-nav,.quiz-wrap,.notes-panel,.footer,.toast-container,.exercise-box,.timer-widget,.goal-card{display:none!important}.content,.page-standalone{padding:0!important;max-width:100%!important}pre{background:#f8fafc!important;color:#0f172a!important;border:1px solid #e2e8f0!important}}
::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--bd);border-radius:3px}