:root{
  --navy:#003f68;
  --sky:#4da6d5;
  --bg:#f0f6fb;
  --border:#c2d9ea;
  --text:#1e293b;
  --muted:#64748b;
  --danger:#dc2626;
  --ok:#16a34a;
  --gold:#d97706;
}
*,*::before,*::after{box-sizing:border-box;}
body{margin:0;font-family:'Inter',Arial,sans-serif;background:var(--bg);color:var(--text);padding-top:64px;padding-bottom:52px;}
a{color:var(--navy);}

/* ---- Top nav (fixed) ---- */
.site-nav{background:#fff;border-bottom:1px solid var(--border);position:fixed;top:0;left:0;right:0;z-index:100;height:64px;}
.site-nav-inner{max-width:1180px;height:100%;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px;}
.site-logo{font-weight:800;font-size:19px;color:var(--navy);text-decoration:none;letter-spacing:.3px;display:flex;align-items:center;gap:8px;}
.site-logo-img{height:34px;width:34px;object-fit:contain;border-radius:6px;}
.site-logo span{color:var(--sky);}
.site-links{display:flex;gap:22px;align-items:center;flex-wrap:wrap;}
.site-links a{color:var(--text);text-decoration:none;font-size:14px;font-weight:600;}
.site-links a:hover{color:var(--navy);}
.site-links a.login-btn{background:var(--navy);color:#fff;padding:8px 18px;border-radius:8px;}
.site-links a.login-btn:hover{background:var(--sky);color:#fff;}

/* ---- Hero ---- */
.hero{background:linear-gradient(135deg,var(--navy),var(--sky));color:#fff;padding:70px 24px;text-align:center;}
.hero h1{font-size:32px;margin:0 0 14px;font-weight:800;}
.hero p{font-size:16px;opacity:.92;margin:0 0 26px;}
.hero-search{max-width:520px;margin:0 auto 24px;display:flex;gap:8px;}
.hero-search input{flex:1;padding:12px 16px;border-radius:9px;border:none;font-size:14px;}
.hero-search button{padding:12px 20px;border-radius:9px;border:none;background:var(--gold);color:#fff;font-weight:700;cursor:pointer;}
.hero-cta{display:inline-block;background:#fff;color:var(--navy);padding:13px 30px;border-radius:9px;font-weight:800;text-decoration:none;font-size:15px;}
.hero-cta:hover{background:var(--bg);}

/* ---- Container / sections ---- */
.container{max-width:1180px;margin:0 auto;padding:40px 24px;}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.section-head h2{color:var(--navy);font-size:21px;margin:0;}
.section-head a{font-size:13px;font-weight:700;text-decoration:none;}

/* ---- Exam cards ---- */
.exam-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:18px;}
.exam-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px;transition:box-shadow .15s,transform .15s;position:relative;}
.exam-card:hover{box-shadow:0 6px 18px rgba(0,63,104,.1);transform:translateY(-2px);}
.exam-card-link{text-decoration:none;color:inherit;display:block;}
.exam-card-title{font-size:16px;font-weight:800;color:var(--navy);margin:0 0 10px;overflow-wrap:anywhere;}
.exam-detail-rows{margin-bottom:10px;}
.detail-row{display:flex;justify-content:space-between;gap:10px;padding:5px 0;border-bottom:1px dashed var(--border);font-size:12.5px;}
.detail-row:last-child{border-bottom:none;}
.dr-label{color:var(--muted);font-weight:600;flex-shrink:0;}
.dr-value{color:var(--text);font-weight:700;text-align:right;min-width:0;overflow-wrap:anywhere;}
.exam-card-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:4px;}
.pill{background:var(--bg);border:1px solid var(--border);border-radius:99px;padding:3px 10px;font-size:11px;color:var(--muted);font-weight:600;}
.pill-level{background:#eef3f8;border-color:var(--sky);color:var(--navy);font-weight:700;}
.admin-edit-badge{position:absolute;top:12px;right:12px;background:var(--gold);color:#fff;font-size:11px;font-weight:700;padding:4px 10px;border-radius:99px;text-decoration:none;z-index:2;}
.admin-edit-badge:hover{background:#b45309;}
.exam-card-actions{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 12px;}
.card-btn{flex:1;min-width:110px;text-align:center;padding:9px 10px;border-radius:9px;border:1.5px solid var(--border);background:var(--bg);color:var(--navy);font-size:12px;font-weight:700;text-decoration:none;cursor:pointer;}
.card-btn:hover{border-color:var(--navy);background:#eef3f8;}
.card-btn.practice{background:var(--navy);color:#fff;border-color:var(--navy);}
.card-btn.practice:hover{background:var(--sky);border-color:var(--sky);}
.card-btn.disabled{color:var(--muted);opacity:.55;cursor:not-allowed;background:var(--bg);}
.exam-card-foot{display:flex;justify-content:flex-end;align-items:center;font-size:12px;color:var(--muted);border-top:1px solid var(--border);padding-top:10px;}
.exam-card-cta{color:var(--navy);font-weight:700;}
.empty-state{text-align:center;color:var(--muted);padding:50px 20px;}

/* ---- Exam detail ---- */
.exam-detail-head{background:#fff;border:1px solid var(--border);border-radius:14px;padding:28px 30px;margin-bottom:24px;}
.exam-detail-head h1{color:var(--navy);font-size:24px;margin:0 0 12px;overflow-wrap:anywhere;}
.detail-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px;margin:18px 0;}
.detail-item{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:10px 14px;}
.detail-item .label{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px;font-weight:700;}
.detail-item .value{font-size:14px;font-weight:700;color:var(--text);margin-top:2px;overflow-wrap:anywhere;}
.file-btns{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;}
.file-btn{display:inline-flex;align-items:center;gap:8px;background:var(--bg);border:1px solid var(--border);border-radius:9px;padding:10px 16px;text-decoration:none;color:var(--navy);font-weight:700;font-size:13px;}
.file-btn:hover{background:#eef3f8;border-color:var(--navy);}
.start-btn{display:inline-block;background:var(--navy);color:#fff;padding:13px 26px;border-radius:9px;font-weight:800;text-decoration:none;margin-top:22px;font-size:14px;}
.start-btn:hover{background:var(--sky);}

/* ---- Search / filter bar ---- */
.filter-bar{background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px 18px;display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px;}
.filter-bar input,.filter-bar select{padding:9px 12px;border:1px solid var(--border);border-radius:8px;font-size:13px;}
.filter-bar input[type=text]{flex:1;min-width:180px;}
.filter-bar button{padding:9px 18px;background:var(--navy);color:#fff;border:none;border-radius:8px;font-weight:700;font-size:13px;cursor:pointer;}

/* ---- Simple table listing (downloads/answerkeys center) ---- */
.file-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden;}
.file-table th,.file-table td{padding:12px 14px;border-bottom:1px solid var(--border);font-size:13px;text-align:left;}
.file-table th{background:var(--bg);color:var(--muted);text-transform:uppercase;font-size:11px;letter-spacing:.4px;}
.file-table tr:last-child td{border-bottom:none;}

footer.site-footer{text-align:center;color:var(--muted);font-size:12px;padding:16px 20px;border-top:1px solid var(--border);position:fixed;bottom:0;left:0;right:0;background:#fff;z-index:90;height:52px;box-sizing:border-box;overflow:hidden;}

/* ---- Dashboard tabs ---- */
.mode-tabs{display:flex;gap:8px;}
.mode-tab{padding:9px 20px;border-radius:9px;border:1.5px solid var(--border);background:#fff;color:var(--muted);font-size:13px;font-weight:700;cursor:pointer;}
.mode-tab:hover{border-color:var(--navy);color:var(--navy);}
.mode-tab.active{border-color:var(--navy);background:var(--navy);color:#fff;}

/* ---- Course catalog ---- */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;}
.course-card{background:#fff;border:1px solid var(--border);border-radius:14px;overflow:hidden;transition:box-shadow .15s,transform .15s;}
.course-card:hover{box-shadow:0 6px 18px rgba(0,63,104,.1);transform:translateY(-2px);}
.course-banner{aspect-ratio:16/9;background:var(--bg);overflow:hidden;}
.course-banner img{width:100%;height:100%;object-fit:cover;display:block;}
.course-banner-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:40px;color:var(--sky);}
.course-body{padding:18px 20px;}
.course-mode{font-size:12px;color:var(--ok);font-weight:700;margin-bottom:8px;}
.course-title{font-size:17px;font-weight:800;color:var(--navy);margin-bottom:10px;}
.course-qual{font-size:12px;color:var(--muted);margin-bottom:6px;}
.course-qual span{display:block;font-weight:700;text-transform:uppercase;font-size:10.5px;letter-spacing:.4px;color:var(--text);margin-bottom:2px;}
.course-price{font-size:15px;font-weight:800;color:var(--navy);margin-bottom:8px;}
.course-desc{font-size:12.5px;color:var(--muted);line-height:1.5;margin:0 0 14px;}
.course-actions{display:flex;gap:10px;}
.course-btn{flex:1;text-align:center;padding:10px 14px;border-radius:9px;font-size:13px;font-weight:700;text-decoration:none;}
.course-btn-register{background:var(--ok);color:#fff;}
.course-btn-register:hover{background:#15803d;}
.course-btn-buy{background:var(--navy);color:#fff;}
.course-btn-buy:hover{background:var(--sky);}

@media (max-width:700px){
  .site-links{gap:12px;}
  .hero h1{font-size:24px;}
  .exam-detail-head{padding:20px;}
}