/* ── BASE ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:'Plus Jakarta Sans',sans-serif;background:#f0f4ff;color:#1e293b;line-height:1.6;overflow-x:hidden;}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}
ul{list-style:none;}

/* ── NAV ── */
.sn-nav{background:#1d4ed8;position:sticky;top:0;z-index:200;box-shadow:0 2px 12px rgba(29,78,216,.3);}
.sn-nav-inner{max-width:1200px;margin:0 auto;padding:0 5%;display:flex;align-items:center;justify-content:space-between;height:62px;}
.sn-logo{font-size:22px;font-weight:800;color:#fff;display:flex;align-items:center;gap:8px;}
.sn-logo-icon{background:#fff;color:#1d4ed8;width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:900;}
.sn-logo span{color:#bfdbfe;}
.sn-nav-links{display:flex;gap:4px;align-items:center;}
.sn-nav-links a{color:rgba(255,255,255,.8);font-size:13px;font-weight:500;padding:8px 14px;border-radius:6px;transition:all .2s;}
.sn-nav-links a:hover,.sn-nav-links a.active{background:rgba(255,255,255,.15);color:#fff;}
.sn-nav-right{display:flex;gap:10px;align-items:center;}
.sn-btn{padding:9px 20px;border-radius:8px;font-size:13px;font-weight:600;border:none;cursor:pointer;font-family:'Plus Jakarta Sans',sans-serif;transition:all .2s;}
.sn-btn-white{background:#fff;color:#1d4ed8;}
.sn-btn-white:hover{background:#eff6ff;}
.sn-btn-outline{background:transparent;border:1.5px solid rgba(255,255,255,.4);color:#fff;}
.sn-btn-outline:hover{border-color:#fff;}

/* ── HERO ── */
.sn-hero{background:linear-gradient(135deg,#1e3a8a 0%,#1d4ed8 50%,#2563eb 100%);padding:64px 5% 80px;text-align:center;position:relative;overflow:hidden;}
.sn-hero::before{content:'';position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);background-size:24px 24px;}
.sn-hero-inner{position:relative;z-index:1;max-width:700px;margin:0 auto;}
.sn-hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);border-radius:20px;padding:6px 16px;font-size:12px;color:#bfdbfe;margin-bottom:24px;font-weight:600;letter-spacing:.5px;}
.sn-hero h1{font-size:clamp(28px,4vw,48px);font-weight:800;color:#fff;line-height:1.15;margin-bottom:18px;}
.sn-hero h1 span{color:#93c5fd;}
.sn-hero p{font-size:16px;color:#bfdbfe;line-height:1.7;margin-bottom:36px;max-width:560px;margin-left:auto;margin-right:auto;}
.sn-hero-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:48px;}
.sn-btn-hero{padding:14px 32px;border-radius:10px;font-size:15px;font-weight:700;border:none;cursor:pointer;font-family:'Plus Jakarta Sans',sans-serif;transition:all .2s;}
.sn-btn-hero-primary{background:#fff;color:#1d4ed8;}
.sn-btn-hero-primary:hover{background:#eff6ff;transform:translateY(-1px);}
.sn-btn-hero-ghost{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.3);}
.sn-btn-hero-ghost:hover{background:rgba(255,255,255,.2);}

/* Stats Row */
.sn-hero-stats{display:flex;gap:0;justify-content:center;border-top:1px solid rgba(255,255,255,.15);padding-top:36px;}
.sn-stat{padding:0 36px;border-right:1px solid rgba(255,255,255,.15);text-align:center;}
.sn-stat:last-child{border-right:none;}
.sn-stat-num{font-size:28px;font-weight:800;color:#fff;line-height:1;}
.sn-stat-num span{color:#93c5fd;}
.sn-stat-label{font-size:12px;color:#93c5fd;margin-top:4px;}

/* ── EXAM CARDS ── */
.sn-section{max-width:1200px;margin:0 auto;padding:56px 5%;}
.sn-section-title{font-size:24px;font-weight:800;color:#1e293b;margin-bottom:8px;}
.sn-section-sub{font-size:14px;color:#64748b;margin-bottom:32px;}
.sn-exam-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.sn-exam-card{border-radius:16px;padding:28px 22px;color:#fff;position:relative;overflow:hidden;cursor:pointer;transition:transform .2s,box-shadow .2s;}
.sn-exam-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(0,0,0,.15);}
.sn-exam-card::before{content:'';position:absolute;top:-20px;right:-20px;width:80px;height:80px;border-radius:50%;background:rgba(255,255,255,.1);}
.sn-exam-card-jamb    {background:linear-gradient(135deg,#1e40af,#3b82f6);}
.sn-exam-card-waec    {background:linear-gradient(135deg,#14532d,#22c55e);}
.sn-exam-card-neco    {background:linear-gradient(135deg,#78350f,#f59e0b);}
.sn-exam-card-postutme{background:linear-gradient(135deg,#581c87,#a855f7);}
.sn-exam-card-icon{font-size:32px;margin-bottom:14px;}
.sn-exam-card h3{font-size:20px;font-weight:800;margin-bottom:4px;}
.sn-exam-card p{font-size:12px;opacity:.8;margin-bottom:16px;}
.sn-exam-card-meta{display:flex;gap:14px;font-size:12px;opacity:.75;flex-wrap:wrap;}
.sn-exam-card-btn{margin-top:18px;background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.3);color:#fff;padding:8px 18px;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer;transition:background .2s;font-family:'Plus Jakarta Sans',sans-serif;display:inline-block;}
.sn-exam-card-btn:hover{background:rgba(255,255,255,.35);}

/* ── SUBJECT GRID ── */
.sn-subjects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;}
.sn-subject-card{background:#fff;border:1.5px solid #e2e8f0;border-radius:12px;padding:18px 16px;text-align:center;cursor:pointer;transition:all .2s;}
.sn-subject-card:hover{border-color:#1d4ed8;box-shadow:0 4px 16px rgba(29,78,216,.1);transform:translateY(-2px);}
.sn-subject-card.active{border-color:#1d4ed8;background:#eff6ff;}
.sn-subject-icon{font-size:28px;margin-bottom:10px;}
.sn-subject-card h4{font-size:13px;font-weight:700;color:#1e293b;margin-bottom:4px;}
.sn-subject-card p{font-size:11px;color:#94a3b8;}

/* ── PAST QUESTIONS BROWSER ── */
.sn-pq-browser{background:#fff;border-radius:16px;border:1px solid #e2e8f0;overflow:hidden;}
.sn-pq-filters{padding:20px 24px;background:#f8fafc;border-bottom:1px solid #e2e8f0;display:flex;gap:12px;flex-wrap:wrap;align-items:center;}
.sn-pq-filters label{font-size:12px;font-weight:600;color:#64748b;}
.sn-select{padding:9px 14px;border:1.5px solid #e2e8f0;border-radius:8px;font-family:'Plus Jakarta Sans',sans-serif;font-size:13px;color:#1e293b;background:#fff;outline:none;cursor:pointer;transition:border-color .2s;}
.sn-select:focus{border-color:#1d4ed8;}
.sn-btn-start{background:#1d4ed8;color:#fff;padding:10px 24px;border-radius:8px;font-size:13px;font-weight:700;border:none;cursor:pointer;font-family:'Plus Jakarta Sans',sans-serif;transition:background .2s;display:flex;align-items:center;gap:6px;}
.sn-btn-start:hover{background:#1e40af;}
.sn-pq-list{padding:0;}
.sn-pq-item{padding:22px 24px;border-bottom:1px solid #f1f5f9;transition:background .15s;}
.sn-pq-item:last-child{border-bottom:none;}
.sn-pq-item:hover{background:#f8fafc;}
.sn-pq-meta{display:flex;gap:10px;align-items:center;margin-bottom:10px;flex-wrap:wrap;}
.sn-badge{font-size:10px;font-weight:700;padding:3px 10px;border-radius:20px;letter-spacing:.5px;}
.sn-badge-jamb    {background:#dbeafe;color:#1e40af;}
.sn-badge-waec    {background:#dcfce7;color:#14532d;}
.sn-badge-neco    {background:#fef3c7;color:#78350f;}
.sn-badge-postutme{background:#f3e8ff;color:#581c87;}
.sn-badge-year{background:#f1f5f9;color:#475569;}
.sn-pq-question{font-size:15px;color:#1e293b;font-weight:500;line-height:1.6;margin-bottom:14px;}
.sn-pq-options{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:14px;}
.sn-pq-option{padding:10px 14px;border:1.5px solid #e2e8f0;border-radius:8px;font-size:13px;color:#475569;cursor:pointer;transition:all .2s;display:flex;align-items:center;gap:8px;}
.sn-pq-option:hover{border-color:#1d4ed8;color:#1d4ed8;background:#eff6ff;}
.sn-pq-option.correct{border-color:#15803d;background:#dcfce7;color:#14532d;}
.sn-pq-option.wrong{border-color:#dc2626;background:#fee2e2;color:#dc2626;}
.sn-pq-option.reveal{border-color:#15803d;background:#dcfce7;color:#14532d;}
.sn-option-letter{width:24px;height:24px;border-radius:50%;background:#f1f5f9;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;flex-shrink:0;}
.sn-pq-actions{display:flex;gap:10px;flex-wrap:wrap;}
.sn-btn-answer{background:#f1f5f9;color:#475569;padding:8px 16px;border-radius:8px;font-size:12px;font-weight:600;border:none;cursor:pointer;font-family:'Plus Jakarta Sans',sans-serif;display:flex;align-items:center;gap:5px;transition:all .2s;}
.sn-btn-answer:hover{background:#e2e8f0;}
.sn-explanation{display:none;margin-top:14px;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:10px;padding:16px;}
.sn-explanation.show{display:block;}
.sn-explanation-header{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:#15803d;margin-bottom:8px;}
.sn-explanation-text{font-size:14px;color:#166534;line-height:1.7;}
.sn-ai-explanation{display:none;margin-top:10px;background:#eff6ff;border:1px solid #bfdbfe;border-radius:10px;padding:16px;}
.sn-ai-explanation.show{display:block;}
.sn-ai-explanation-header{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:#1e40af;margin-bottom:8px;}
.sn-ai-loading{display:none;align-items:center;gap:8px;font-size:13px;color:#64748b;padding:8px 0;}
.sn-ai-loading.show{display:flex;}
.sn-spinner{width:16px;height:16px;border:2px solid #e2e8f0;border-top-color:#1d4ed8;border-radius:50%;animation:spin .7s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}

/* ── MOCK TEST / QUIZ ── */
.sn-quiz-wrap{background:#fff;border-radius:16px;border:1px solid #e2e8f0;overflow:hidden;}
.sn-quiz-header{background:#1d4ed8;padding:20px 28px;color:#fff;display:flex;align-items:center;justify-content:space-between;}
.sn-quiz-title{font-size:16px;font-weight:700;}
.sn-quiz-timer{display:flex;align-items:center;gap:8px;font-size:20px;font-weight:800;font-family:'Merriweather',serif;}
.sn-quiz-timer.warning{color:#fbbf24;}
.sn-quiz-timer.danger{color:#f87171;animation:pulse .5s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.6;}}
.sn-quiz-progress{background:#f8fafc;padding:14px 28px;border-bottom:1px solid #e2e8f0;display:flex;align-items:center;gap:16px;}
.sn-quiz-progress-bar{flex:1;height:8px;background:#e2e8f0;border-radius:20px;overflow:hidden;}
.sn-quiz-progress-fill{height:100%;background:#1d4ed8;border-radius:20px;transition:width .3s;}
.sn-quiz-progress-text{font-size:13px;font-weight:600;color:#64748b;white-space:nowrap;}
.sn-quiz-body{padding:28px;}
.sn-quiz-question-num{font-size:11px;font-weight:700;letter-spacing:1px;color:#94a3b8;margin-bottom:8px;text-transform:uppercase;}
.sn-quiz-question{font-size:17px;font-weight:600;color:#1e293b;line-height:1.65;margin-bottom:24px;}
.sn-quiz-options{display:flex;flex-direction:column;gap:10px;margin-bottom:28px;}
.sn-quiz-option{padding:14px 18px;border:2px solid #e2e8f0;border-radius:10px;font-size:14px;color:#374151;cursor:pointer;transition:all .2s;display:flex;align-items:center;gap:12px;font-weight:500;}
.sn-quiz-option:hover:not(.answered){border-color:#1d4ed8;background:#eff6ff;color:#1d4ed8;}
.sn-quiz-option.selected{border-color:#1d4ed8;background:#eff6ff;color:#1d4ed8;}
.sn-quiz-option.correct{border-color:#15803d;background:#dcfce7;color:#14532d;}
.sn-quiz-option.wrong{border-color:#dc2626;background:#fee2e2;color:#dc2626;}
.sn-quiz-option.reveal{border-color:#15803d;background:#dcfce7;color:#14532d;}
.sn-quiz-option-letter{width:30px;height:30px;border-radius:50%;border:2px solid currentColor;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;flex-shrink:0;}
.sn-quiz-footer{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;}
.sn-btn-next{background:#1d4ed8;color:#fff;padding:12px 28px;border-radius:10px;font-size:14px;font-weight:700;border:none;cursor:pointer;font-family:'Plus Jakarta Sans',sans-serif;display:flex;align-items:center;gap:8px;transition:background .2s;}
.sn-btn-next:hover{background:#1e40af;}
.sn-btn-skip{background:#f1f5f9;color:#64748b;padding:12px 20px;border-radius:10px;font-size:14px;font-weight:600;border:none;cursor:pointer;font-family:'Plus Jakarta Sans',sans-serif;transition:all .2s;}
.sn-btn-skip:hover{background:#e2e8f0;}
.sn-quiz-score-indicator{font-size:13px;color:#64748b;}
.sn-score-correct{color:#15803d;font-weight:700;}
.sn-score-wrong{color:#dc2626;font-weight:700;}

/* ── RESULTS SCREEN ── */
.sn-results{display:none;padding:40px 28px;text-align:center;}
.sn-results.show{display:block;}
.sn-results-circle{width:120px;height:120px;border-radius:50%;margin:0 auto 24px;display:flex;align-items:center;justify-content:center;flex-direction:column;border:6px solid;}
.sn-results-circle.excellent{border-color:#15803d;background:#f0fdf4;}
.sn-results-circle.good{border-color:#1d4ed8;background:#eff6ff;}
.sn-results-circle.average{border-color:#b45309;background:#fef3c7;}
.sn-results-circle.poor{border-color:#dc2626;background:#fee2e2;}
.sn-results-pct{font-size:30px;font-weight:800;}
.sn-results-label{font-size:11px;font-weight:600;opacity:.7;}
.sn-results h2{font-size:24px;font-weight:800;margin-bottom:8px;}
.sn-results-message{font-size:15px;color:#64748b;margin-bottom:28px;}
.sn-results-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:28px;}
.sn-results-stat{background:#f8fafc;border-radius:10px;padding:16px;}
.sn-results-stat-num{font-size:24px;font-weight:800;}
.sn-results-stat-label{font-size:12px;color:#64748b;}
.sn-results-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;}

/* ── LEADERBOARD ── */
.sn-lb-table{width:100%;border-collapse:collapse;}
.sn-lb-table th{background:#f8fafc;padding:12px 16px;font-size:12px;font-weight:700;color:#64748b;text-align:left;border-bottom:2px solid #e2e8f0;}
.sn-lb-table td{padding:14px 16px;font-size:14px;border-bottom:1px solid #f1f5f9;color:#374151;}
.sn-lb-table tr:hover td{background:#f8fafc;}
.sn-lb-rank{font-weight:800;font-size:16px;}
.sn-rank-1{color:#f59e0b;}
.sn-rank-2{color:#94a3b8;}
.sn-rank-3{color:#b45309;}
.sn-lb-badge{font-size:11px;padding:3px 9px;border-radius:20px;font-weight:600;}

/* ── AD PLACEHOLDERS ── */
.sn-ad-placeholder{background:#f1f5f9;border:1px dashed #cbd5e1;text-align:center;padding:18px;font-size:11px;color:#94a3b8;letter-spacing:1px;border-radius:8px;}
.sn-ad-leaderboard .sn-ad-placeholder{min-height:90px;display:flex;align-items:center;justify-content:center;}
.sn-ad-sidebar .sn-ad-placeholder{min-height:250px;display:flex;align-items:center;justify-content:center;flex-direction:column;}

/* ── SIDEBAR ── */
.sn-content-wrap{display:grid;grid-template-columns:1fr 300px;gap:28px;}
.sn-widget{margin-bottom:24px;background:#fff;border-radius:12px;border:1px solid #e2e8f0;overflow:hidden;}
.sn-widget-title{font-size:14px;font-weight:700;padding:14px 18px;border-bottom:1px solid #f1f5f9;color:#1e293b;}

/* Quick Links Sidebar */
.sn-quick-links{display:flex;flex-direction:column;gap:0;}
.sn-quick-link{display:flex;align-items:center;gap:10px;padding:12px 18px;border-bottom:1px solid #f1f5f9;font-size:13px;color:#374151;transition:background .15s;font-weight:500;}
.sn-quick-link:last-child{border-bottom:none;}
.sn-quick-link:hover{background:#f8fafc;color:#1d4ed8;}
.sn-quick-link i{font-size:16px;color:#94a3b8;}

/* ── FOOTER ── */
.sn-footer{background:#0f172a;color:#fff;padding:48px 5% 24px;margin-top:60px;}
.sn-footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;max-width:1200px;margin:0 auto 40px;}
.sn-footer-brand .sn-logo{font-size:20px;margin-bottom:12px;display:flex;}
.sn-footer-brand p{font-size:13px;color:#94a3b8;line-height:1.7;max-width:240px;}
.sn-footer-col h4{font-size:11px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:#94a3b8;margin-bottom:16px;}
.sn-footer-col ul{display:flex;flex-direction:column;gap:10px;}
.sn-footer-col ul li a{font-size:13px;color:#64748b;transition:color .2s;}
.sn-footer-col ul li a:hover{color:#93c5fd;}
.sn-footer-bottom{border-top:1px solid #1e293b;padding-top:20px;display:flex;justify-content:space-between;align-items:center;font-size:12px;color:#475569;max-width:1200px;margin:0 auto;flex-wrap:wrap;gap:10px;}

/* ── RESPONSIVE ── */
@media(max-width:900px){
    .sn-exam-grid{grid-template-columns:repeat(2,1fr);}
    .sn-content-wrap{grid-template-columns:1fr;}
    .sn-footer-grid{grid-template-columns:1fr 1fr;}
    .sn-hero-stats{flex-wrap:wrap;}
    .sn-stat{padding:12px 24px;}
    .sn-nav-links{display:none;}
}
@media(max-width:560px){
    .sn-exam-grid{grid-template-columns:1fr 1fr;}
    .sn-pq-options{grid-template-columns:1fr;}
    .sn-results-stats{grid-template-columns:1fr;}
    .sn-footer-grid{grid-template-columns:1fr;}
    .sn-quiz-option{padding:12px 14px;}
}