:root {
  --navy:      #0D2B52;
  --blue:      #1A6FBF;
  --sky:       #5AB3E8;
  --sky-light: #A8D4F0;
  --bg:        #EEF5FB;
  --bg-light:  #DCF0FB;
  --white:     #FFFFFF;
  --border:    #C0DCEE;
  --teal:      #2D9B7A;
  --teal-light:#D0EFE7;
  --text:      #0D2B52;
  --text-mid:  #2A5480;
  --text-muted:#6A96B5;
  --sidebar:   215px;
  --topbar:    56px;
  --radius:    10px;
  --radius-lg: 14px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);min-height:100vh}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}

/* ── LAYOUT ─────────────────────────────────────── */
.layout{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar);background:var(--navy);display:flex;flex-direction:column;padding:22px 0;flex-shrink:0;position:fixed;top:0;left:0;height:100vh;overflow-y:auto;z-index:100}
.main{margin-left:var(--sidebar);flex:1;display:flex;flex-direction:column;min-height:100vh}
.topbar{height:var(--topbar);padding:0 28px;display:flex;align-items:center;justify-content:space-between;background:var(--white);border-bottom:1px solid var(--border);flex-shrink:0;position:sticky;top:0;z-index:90}
.page-title{font-family:'Playfair Display',serif;font-size:19px;font-weight:600;color:var(--navy)}
.topbar-right{display:flex;align-items:center;gap:10px}
.page-content{padding:26px;flex:1}

/* ── SIDEBAR ─────────────────────────────────────── */
.sidebar-logo{padding:0 18px 26px;line-height:1.2}
.logo-top{display:block;font-family:'DM Sans',sans-serif;font-size:14px;font-weight:600;letter-spacing:2px;color:#5AB3E8}
.logo-bot{display:block;font-family:'DM Sans',sans-serif;font-size:11px;font-weight:400;letter-spacing:1.5px;color:rgba(255,255,255,0.5);text-transform:uppercase}
.mode-toggle{display:flex;margin:0 14px 20px;background:rgba(255,255,255,0.08);border-radius:8px;padding:3px}
.mode-btn{flex:1;text-align:center;padding:5px;border-radius:6px;font-size:12px;font-weight:500;color:rgba(255,255,255,0.45);transition:all .15s;text-decoration:none}
.mode-btn.active{background:var(--blue);color:#fff}
.mode-btn:hover:not(.active){color:rgba(255,255,255,0.8);text-decoration:none}
.sidebar-nav{list-style:none;padding:0 10px;flex:1}
.nav-item{display:flex;align-items:center;gap:9px;padding:9px 11px;border-radius:8px;font-size:12px;font-weight:400;color:rgba(255,255,255,0.55);transition:all .15s;margin-bottom:2px;text-decoration:none}
.nav-item:hover{background:rgba(255,255,255,0.06);color:rgba(255,255,255,0.85);text-decoration:none}
.nav-item.active{background:rgba(90,179,232,0.18);color:#A8D4F0;font-weight:600}
.sidebar-user{padding:14px 18px;border-top:1px solid rgba(255,255,255,0.07);display:flex;align-items:center;gap:9px;margin-top:auto}
.user-avatar-sm{width:30px;height:30px;border-radius:50%;background:var(--blue);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#fff;flex-shrink:0}
.user-name-sm{font-size:12px;font-weight:600;color:#FFF9F4}
.user-role-sm{font-size:10px;color:rgba(255,255,255,0.35);text-transform:capitalize}

/* ── SEARCH ─────────────────────────────────────── */
.search-form{display:flex;align-items:center;gap:7px;background:var(--bg);border:1px solid var(--border);border-radius:20px;padding:6px 14px}
.search-form input{border:none;background:transparent;outline:none;font-size:12px;color:var(--text);width:150px;font-family:'DM Sans',sans-serif}
.search-form svg{color:var(--text-muted);flex-shrink:0}

/* ── FLASH ─────────────────────────────────────── */
.flash{padding:12px 28px;font-size:13px;font-weight:500}
.flash-success{background:var(--teal-light);color:#1a5c48;border-bottom:1px solid #b0ddd0}
.flash-error{background:#fee;color:#7a1f1f;border-bottom:1px solid #f5c6c6}
.flash-info{background:var(--bg-light);color:var(--text-mid);border-bottom:1px solid var(--border)}

/* ── CARDS ─────────────────────────────────────── */
.card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px}
.card-sm{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:14px}

/* ── STAT CARDS ─────────────────────────────────── */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin-bottom:26px}
.stat-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px}
.stat-label{font-size:11px;color:var(--text-muted);font-weight:500;margin-bottom:6px}
.stat-value{font-family:'Playfair Display',serif;font-size:25px;font-weight:700;color:var(--navy)}
.stat-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}

/* ── COURSE CARDS ───────────────────────────────── */
.courses-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.course-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;cursor:pointer;transition:box-shadow .2s}
.course-card:hover{box-shadow:0 4px 20px rgba(13,43,82,.1)}
.course-thumb{height:130px;background:linear-gradient(135deg,var(--navy),#1A4B8C);display:flex;align-items:center;justify-content:center;font-size:50px;position:relative}
.course-thumb-sm{height:90px;background:linear-gradient(135deg,var(--navy),#1A4B8C);display:flex;align-items:center;justify-content:center;font-size:34px}
.course-body{padding:15px}
.course-cat{font-size:10px;color:var(--blue);font-weight:600;text-transform:uppercase;letter-spacing:.5px;margin-bottom:5px}
.course-title{font-size:13px;font-weight:700;color:var(--navy);margin-bottom:4px;line-height:1.4}
.course-sub{font-size:11px;color:var(--text-muted);margin-bottom:9px;line-height:1.5}
.course-meta{display:flex;align-items:center;gap:10px;font-size:11px;color:var(--text-muted);margin-bottom:9px}
.course-footer{display:flex;align-items:center;justify-content:space-between}
.course-price{font-family:'Playfair Display',serif;font-size:17px;font-weight:700;color:var(--navy)}
.course-price.free{color:var(--teal)}
.badge{display:inline-block;font-size:10px;font-weight:700;padding:3px 9px;border-radius:20px}
.badge-enrolled{background:var(--teal-light);color:var(--teal)}
.badge-free{background:var(--teal-light);color:var(--teal)}
.badge-new{background:#DCF0FB;color:var(--blue)}
.badge-best{background:#fff3cd;color:#856404}
.badge-corner{position:absolute;top:10px;right:10px}

/* ── PROGRESS ───────────────────────────────────── */
.progress-bar-wrap{display:flex;align-items:center;gap:7px}
.progress-bar{flex:1;height:4px;background:var(--bg-light);border-radius:2px}
.progress-fill{height:100%;border-radius:2px;background:var(--blue);transition:width .3s}
.progress-fill.complete{background:var(--teal)}
.progress-pct{font-size:11px;font-weight:600}

/* ── BUTTONS ─────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:7px;padding:10px 20px;border-radius:9px;font-size:13px;font-weight:600;border:none;cursor:pointer;font-family:'DM Sans',sans-serif;text-decoration:none;transition:opacity .15s}
.btn:hover{opacity:.88;text-decoration:none}
.btn-primary{background:var(--blue);color:#fff}
.btn-outline{background:transparent;color:var(--blue);border:1.5px solid var(--blue)}
.btn-navy{background:var(--navy);color:#fff}
.btn-teal{background:var(--teal);color:#fff}
.btn-sm{padding:7px 14px;font-size:12px}
.btn-danger{background:#dc3545;color:#fff}
.btn-full{width:100%;justify-content:center;margin-bottom:8px}

/* ── FORMS ─────────────────────────────────────── */
.form-group{margin-bottom:17px}
.form-label{display:block;font-size:12px;font-weight:600;color:var(--navy);margin-bottom:5px}
.form-control{width:100%;padding:9px 13px;border:1px solid var(--border);border-radius:8px;font-size:13px;color:var(--text);background:var(--white);outline:none;font-family:'DM Sans',sans-serif;transition:border .15s}
.form-control:focus{border-color:var(--sky)}
textarea.form-control{resize:vertical;line-height:1.7;min-height:100px}
select.form-control{cursor:pointer}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.input-prefix{display:flex;border:1px solid var(--border);border-radius:8px;overflow:hidden;background:var(--white)}
.input-prefix span{padding:9px 11px;background:var(--bg-light);color:var(--text-muted);font-size:12px;border-right:1px solid var(--border);flex-shrink:0}
.input-prefix input{flex:1;padding:9px 12px;border:none;outline:none;font-size:12px;font-family:'DM Sans',sans-serif;background:transparent}

/* ── AUTH PAGES ─────────────────────────────────── */
.auth-page{min-height:100vh;background:var(--bg);display:flex;align-items:center;justify-content:center;padding:20px}
.auth-box{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px;width:100%;max-width:420px}
.auth-logo{font-size:11px;letter-spacing:2.5px;color:var(--sky);font-weight:600;margin-bottom:4px}
.auth-logo-sub{font-size:9px;letter-spacing:2px;color:var(--text-muted);text-transform:uppercase;margin-bottom:24px}
.auth-title{font-family:'Playfair Display',serif;font-size:22px;font-weight:700;color:var(--navy);margin-bottom:6px}
.auth-sub{font-size:13px;color:var(--text-muted);margin-bottom:24px}
.auth-error{background:#fee;color:#7a1f1f;padding:10px 14px;border-radius:8px;font-size:13px;margin-bottom:16px}

/* ── BANNER ─────────────────────────────────────── */
.banner{background:linear-gradient(135deg,var(--navy) 0%,var(--blue) 100%);border-radius:var(--radius-lg);padding:26px 28px;margin-bottom:26px;position:relative;overflow:hidden}
.banner-wave{position:absolute;right:20px;top:-5px;font-size:90px;opacity:.07}
.banner-title{font-family:'Playfair Display',serif;font-size:21px;font-weight:600;color:#fff;margin-bottom:6px}
.banner-sub{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:18px}

/* ── SECTION HEADER ─────────────────────────────── */
.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.section-title{font-family:'Playfair Display',serif;font-size:17px;font-weight:600;color:var(--navy)}

/* ── CURRICULUM ─────────────────────────────────── */
.curriculum-section{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:8px;overflow:hidden}
.cur-section-btn{width:100%;padding:12px 15px;display:flex;justify-content:space-between;align-items:center;background:var(--bg-light);border:none;cursor:pointer;text-align:left;font-family:'DM Sans',sans-serif}
.cur-section-title{font-weight:600;font-size:13px;color:var(--navy)}
.cur-section-meta{font-size:11px;color:var(--text-muted);margin-right:6px}
.cur-lesson{padding:9px 15px;display:flex;align-items:center;gap:10px;border-top:1px solid var(--border);background:var(--white);cursor:pointer}
.cur-lesson:hover{background:var(--bg)}
.cur-lesson.active-lesson{background:#EBF4FD}
.cur-lesson.active-lesson .lesson-title{color:var(--blue);font-weight:600}
.lesson-title{font-size:12px;color:var(--navy);flex:1}
.lesson-title.done{color:var(--text-muted);text-decoration:line-through}
.lesson-dur{font-size:10px;color:var(--text-muted)}

/* ── LESSON PLAYER ──────────────────────────────── */
.lesson-layout{display:flex;height:calc(100vh - var(--topbar));overflow:hidden;margin:-26px}
.lesson-content{flex:1;overflow-y:auto;padding:24px}
.lesson-sidebar{width:275px;border-left:1px solid var(--border);background:var(--white);overflow-y:auto;flex-shrink:0}
.lesson-sidebar-head{padding:13px 13px 10px;border-bottom:1px solid var(--border)}
.lesson-sidebar-title{font-size:12px;font-weight:600;color:var(--navy);margin-bottom:7px}
.video-wrap{background:#0D1B2A;border-radius:12px;overflow:hidden;margin-bottom:20px;position:relative}
.video-iframe{width:100%;aspect-ratio:16/9;display:block;border:none}
.lesson-label{font-size:10px;color:var(--blue);font-weight:600;text-transform:uppercase;letter-spacing:.5px;margin-bottom:5px}
.lesson-heading{font-family:'Playfair Display',serif;font-size:20px;font-weight:700;color:var(--navy);margin-bottom:10px}
.lesson-body{font-size:13px;color:var(--text-mid);line-height:1.8}
.lesson-resources{background:var(--bg-light);border-radius:9px;padding:13px;display:flex;gap:9px;margin-bottom:20px;flex-wrap:wrap}
.lesson-nav{display:flex;justify-content:space-between;align-items:center;margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}

/* ── COURSE DETAIL PAGE ─────────────────────────── */
.course-detail-grid{display:grid;grid-template-columns:1fr 290px;gap:22px;margin-bottom:22px;align-items:start}
.course-detail-title{font-family:'Playfair Display',serif;font-size:25px;font-weight:700;color:var(--navy);margin-bottom:10px;line-height:1.3}
.enroll-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;position:sticky;top:calc(var(--topbar) + 12px)}
.enroll-thumb{height:110px;background:linear-gradient(135deg,var(--navy),var(--blue));border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:48px;margin-bottom:16px}
.enroll-price{font-family:'Playfair Display',serif;font-size:30px;font-weight:700;color:var(--navy);margin-bottom:3px}
.tag-list{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}
.tag{font-size:11px;background:var(--bg-light);color:var(--text-mid);padding:3px 11px;border-radius:20px;font-weight:500}
.learn-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.learn-item{display:flex;align-items:flex-start;gap:8px;font-size:12px;color:var(--text-mid)}
.check-icon{color:var(--teal);flex-shrink:0;margin-top:1px}

/* ── QUIZ ───────────────────────────────────────── */
.quiz-question{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;margin-bottom:16px}
.quiz-q-text{font-size:14px;font-weight:600;color:var(--navy);margin-bottom:14px}
.quiz-option{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1px solid var(--border);border-radius:8px;margin-bottom:8px;cursor:pointer;font-size:13px;transition:all .15s}
.quiz-option:hover{border-color:var(--sky);background:var(--bg-light)}
.quiz-option input{accent-color:var(--blue);flex-shrink:0}
.quiz-result{background:var(--bg-light);border-radius:var(--radius-lg);padding:20px;text-align:center;margin-bottom:20px}
.quiz-score{font-family:'Playfair Display',serif;font-size:36px;font-weight:700;color:var(--blue)}
.quiz-score-sub{font-size:13px;color:var(--text-muted);margin-top:4px}
.answer-correct{background:var(--teal-light);border-color:var(--teal)}
.answer-wrong{background:#fee;border-color:#f5c6c6}

/* ── ASSIGNMENT ─────────────────────────────────── */
.assignment-box{background:var(--bg-light);border-radius:var(--radius-lg);padding:20px;margin-bottom:20px}
.assignment-instructions{font-size:13px;color:var(--text-mid);line-height:1.8}
.submission-preview{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-top:16px}
.grade-badge{display:inline-block;background:var(--teal-light);color:var(--teal);font-weight:700;padding:4px 14px;border-radius:20px;font-size:13px;margin-bottom:8px}

/* ── CERTIFICATE ─────────────────────────────────── */
.cert-frame{border:2px solid var(--sky-light);border-radius:16px;padding:32px 40px;background:linear-gradient(135deg,#fff 0%,#EBF4FD 100%);position:relative;overflow:hidden;max-width:640px;margin-bottom:20px}
.cert-inner-border{position:absolute;top:13px;left:13px;right:13px;bottom:13px;border:1px solid var(--sky-light);border-radius:10px;pointer-events:none}
.cert-accent{position:absolute;top:-22px;right:-22px;width:90px;height:90px;border-radius:50%;background:var(--sky-light);opacity:.3}
.cert-center{text-align:center;position:relative}
.cert-stamp{font-size:9px;letter-spacing:3px;text-transform:uppercase;color:var(--text-muted);margin-bottom:8px}
.cert-for{font-family:'Playfair Display',serif;font-size:12px;color:var(--text-mid);margin-bottom:6px;font-style:italic}
.cert-name{font-family:'Playfair Display',serif;font-size:28px;font-weight:700;color:var(--navy);margin-bottom:6px}
.cert-course{font-family:'Playfair Display',serif;font-size:18px;font-weight:600;color:var(--blue);margin-bottom:18px}
.cert-sigs{display:flex;justify-content:center;gap:44px}
.cert-sig-line{width:95px;border-bottom:1px solid var(--text-muted);margin:0 auto 5px}
.cert-sig-label{font-size:9px;color:var(--text-muted);margin-bottom:2px}
.cert-sig-val{font-size:11px;color:var(--text-mid);font-weight:600}

/* ── ADMIN ───────────────────────────────────────── */
.admin-table{width:100%;border-collapse:collapse;font-size:13px}
.admin-table th{text-align:left;padding:10px 14px;background:var(--bg-light);color:var(--text-mid);font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border)}
.admin-table td{padding:11px 14px;border-bottom:1px solid var(--border);color:var(--navy);vertical-align:middle}
.admin-table tr:hover td{background:var(--bg)}
.admin-tabs{display:flex;border-bottom:1px solid var(--border);background:var(--white);padding:0 28px;margin:-26px -26px 26px}
.admin-tab{padding:11px 15px;border:none;background:transparent;cursor:pointer;font-size:12px;font-weight:400;color:var(--text-muted);border-bottom:2px solid transparent;font-family:'DM Sans',sans-serif;transition:all .15s}
.admin-tab.active{font-weight:600;color:var(--blue);border-bottom-color:var(--blue)}
.section-builder{border:1px solid var(--border);border-radius:var(--radius-lg);margin-bottom:14px;overflow:hidden}
.section-builder-head{padding:11px 15px;background:var(--bg-light);display:flex;align-items:center;gap:9px}
.section-num{width:20px;height:20px;border-radius:5px;background:var(--blue);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:#fff;flex-shrink:0}
.lesson-row{padding:9px 15px 9px 24px;display:flex;align-items:center;gap:9px;border-top:1px solid var(--border);background:var(--white)}
.lesson-type-add{padding:8px 15px;border-top:1px solid var(--border);display:flex;gap:7px;flex-wrap:wrap}

/* ── CATEGORIES FILTER ──────────────────────────── */
.cat-filter{display:flex;gap:7px;margin-bottom:20px;flex-wrap:wrap}
.cat-btn{padding:5px 14px;border-radius:20px;border:1px solid var(--border);background:var(--white);color:var(--text-mid);font-size:12px;font-weight:500;cursor:pointer;font-family:'DM Sans',sans-serif;transition:all .15s;text-decoration:none}
.cat-btn:hover,.cat-btn.active{background:var(--blue);color:#fff;border-color:var(--blue);text-decoration:none}

/* ── MISC ───────────────────────────────────────── */
.divider{height:1px;background:var(--border);margin:20px 0}
.section-bg{background:var(--bg-light);border-radius:var(--radius-lg);padding:18px;margin-bottom:18px}
.stars{color:#F0B429;font-size:12px}
.text-muted{color:var(--text-muted);font-size:13px}
.text-sm{font-size:12px}
.mb-1{margin-bottom:6px}.mb-2{margin-bottom:12px}.mb-3{margin-bottom:18px}.mb-4{margin-bottom:26px}
.mt-2{margin-top:12px}.mt-3{margin-top:18px}
.flex{display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-2{gap:8px}.gap-3{gap:12px}
.toggle{width:40px;height:21px;border-radius:11px;position:relative;cursor:pointer;flex-shrink:0;display:inline-block}
.toggle input{opacity:0;width:0;height:0}
.toggle-slider{position:absolute;inset:0;background:var(--border);border-radius:11px;transition:.15s}
.toggle-slider:before{content:'';position:absolute;width:15px;height:15px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.15s}
input:checked+.toggle-slider{background:var(--blue)}
input:checked+.toggle-slider:before{transform:translateX(19px)}
@media print{.sidebar,.topbar,.lesson-nav,.btn{display:none!important}.main{margin:0}.cert-frame{border:2px solid #ccc}}