*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;color:#172033;background:#fbfcff;line-height:1.65}a{text-decoration:none;color:inherit}.container{width:min(1120px,92%);margin:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(251,252,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid #e8ebf2}.nav-wrap{height:72px;display:flex;align-items:center;justify-content:space-between}.logo{font-weight:900;font-size:1.25rem;letter-spacing:-.04em}.logo span{color:#6573ff;margin:0 2px}nav{display:flex;gap:26px;font-weight:650;color:#536078}nav a:hover{color:#6573ff}.menu-btn{display:none;background:none;border:0;font-size:25px}.hero{padding:90px 0 75px;background:radial-gradient(circle at 85% 20%,#e8ebff 0,transparent 35%),linear-gradient(135deg,#f7f8ff,#fff)}.hero-grid{display:grid;grid-template-columns:1.35fr .8fr;gap:70px;align-items:center}.eyebrow{font-size:.78rem;font-weight:850;letter-spacing:.14em;color:#6573ff;margin:0 0 10px}.hero h1{font-size:clamp(2.5rem,6vw,4.8rem);line-height:1.03;letter-spacing:-.055em;margin:0 0 24px}.hero h1 span{color:#6573ff}.hero-text{font-size:1.15rem;color:#5b667b;max-width:650px}.hero-actions{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}.btn{padding:13px 20px;border-radius:12px;font-weight:800}.primary{background:#6573ff;color:white}.secondary{border:1px solid #dfe3ed;background:white}.hero-card{background:white;border:1px solid #e1e5ee;border-radius:24px;padding:34px;box-shadow:0 20px 60px #26335a12}.lesson-icon{font-size:3.4rem;background:#f0f1ff;width:85px;height:85px;border-radius:20px;display:grid;place-items:center}.hero-card h3{font-size:1.4rem;margin-bottom:5px}.hero-card p{color:#647087}.mini-progress{height:8px;background:#edf0f6;border-radius:10px;overflow:hidden}.mini-progress span{display:block;width:62%;height:100%;background:#6573ff}.hero-card small{display:block;margin-top:10px;color:#7b8495}.stats{background:#151b2d;color:white}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);padding:26px 0}.stat-grid div{padding:0 25px;border-right:1px solid #30374b;text-align:center}.stat-grid div:last-child{border:0}.stat-grid b{display:block;font-size:1.8rem}.stat-grid span{color:#b8c0d0;font-size:.9rem}.section{padding:85px 0}.alt{background:#f4f6fb}.section-heading{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:25px}.section h2{font-size:clamp(2rem,4vw,3rem);letter-spacing:-.04em;line-height:1.1;margin:0 0 20px}.section-heading input{width:300px;padding:13px 15px;border:1px solid #dfe3ed;border-radius:12px;background:white;font-size:1rem}.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:25px}.filter{border:1px solid #dce1ea;background:white;padding:9px 15px;border-radius:999px;cursor:pointer;font-weight:700;color:#58647a}.filter.active{background:#6573ff;color:white;border-color:#6573ff}.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.course{background:white;border:1px solid #e2e6ee;border-radius:18px;padding:24px;transition:.2s;display:flex;flex-direction:column}.course:hover{transform:translateY(-3px);box-shadow:0 12px 35px #26335a12}.course-icon{font-size:2.2rem}.course h3{margin:12px 0 7px;font-size:1.25rem}.course p{color:#667187;margin-top:0}.tag{display:inline-block;font-size:.72rem;font-weight:850;text-transform:uppercase;letter-spacing:.08em;color:#6573ff;background:#eef0ff;padding:4px 8px;border-radius:7px}.course button,.lesson-card button{margin-top:auto;border:0;background:#172033;color:white;padding:11px 14px;border-radius:10px;font-weight:800;cursor:pointer}.detail-section{background:white}.hidden{display:none}.back{border:0;background:#f0f2f7;padding:10px 14px;border-radius:10px;font-weight:750;cursor:pointer;margin-bottom:25px}.detail-head{background:#f5f6ff;padding:35px;border-radius:22px;margin-bottom:25px}.detail-head h2{margin-bottom:8px}.detail-head p{max-width:800px;color:#5e6a80}.lesson-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.lesson-card{border:1px solid #e0e4ed;border-radius:18px;padding:25px;background:#fff}.lesson-card h3{margin-top:0}.lesson-card ul,.lesson-card ol{padding-left:22px}.lesson-card li{margin:8px 0}.tip{background:#f0f7ff;border-left:4px solid #6573ff;padding:14px 17px;border-radius:8px;margin-top:16px}.practice{background:#fff8e8;border-left:4px solid #e0a31a;padding:14px 17px;border-radius:8px;margin-top:16px}.path-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.path{background:white;padding:23px;border:1px solid #e0e4ed;border-radius:17px}.path span{font-weight:900;color:#6573ff}.path h3{margin-bottom:6px}.path p{color:#667187}.safety-box{display:grid;grid-template-columns:1fr 1fr;gap:40px;background:#172033;color:white;padding:45px;border-radius:25px}.safety-box p{color:#c5ccda}.safety-box li{margin:10px 0;color:#e1e5ed}.quiz-box{max-width:800px}.question{background:white;border:1px solid #e0e4ed;border-radius:15px;padding:20px;margin:14px 0}.question b{display:block;margin-bottom:10px}.question label{display:block;padding:7px;border-radius:7px}.question label:hover{background:#f1f3f8}.quiz-submit{border:0;background:#6573ff;color:white;padding:12px 18px;border-radius:10px;font-weight:800;cursor:pointer;margin-top:10px}.result{font-size:1.2rem;font-weight:800;margin-top:18px}footer{background:#101624;color:#b8c0d0;padding:50px 0 20px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}.footer-grid b{color:white;display:block;margin-bottom:10px}.footer-grid a:not(.logo){display:block;margin:7px 0}.copyright{text-align:center;border-top:1px solid #2a3140;margin-top:35px;padding-top:20px;font-size:.85rem}@media(max-width:850px){nav{display:none}.menu-btn{display:block}.hero-grid,.lesson-grid,.safety-box{grid-template-columns:1fr}.course-grid{grid-template-columns:1fr 1fr}.path-grid{grid-template-columns:1fr 1fr}.section-heading{align-items:start;flex-direction:column}.section-heading input{width:100%}}@media(max-width:560px){.course-grid,.path-grid,.stat-grid{grid-template-columns:1fr 1fr}.stat-grid div{padding:8px;border:0}.hero{padding-top:55px}.hero-actions{flex-direction:column}.btn{text-align:center}.footer-grid{grid-template-columns:1fr}nav.mobile-open{display:flex;position:absolute;top:72px;left:0;right:0;background:white;padding:20px;flex-direction:column;border-bottom:1px solid #ddd}.stat-grid b{font-size:1.4rem}}

.quiz-picker{display:flex;flex-wrap:wrap;gap:9px;margin:20px 0}.quiz-course{border:1px solid #dce1ea;background:#fff;padding:9px 13px;border-radius:10px;cursor:pointer;font-weight:700;color:#526078}.quiz-course.selected{background:#6573ff;color:#fff;border-color:#6573ff}.quiz-intro{background:#eef0ff;padding:17px;border-radius:12px;margin:15px 0}.pass{color:#198754}.fail{color:#b42318}.certificate-btn{margin-top:12px;border:0;background:#198754;color:#fff;padding:11px 16px;border-radius:10px;font-weight:800;cursor:pointer}.admin-box{max-width:1050px}.admin-login{display:flex;gap:10px;align-items:end;flex-wrap:wrap;background:#f4f6fb;padding:20px;border-radius:15px}.admin-login label{font-weight:750}.admin-login input{display:block;margin-top:6px;padding:11px;border:1px solid #dce1ea;border-radius:9px}.admin-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0}.admin-stats div{background:#172033;color:white;border-radius:15px;padding:20px;text-align:center}.admin-stats b{display:block;font-size:2rem}.admin-stats span{color:#c3cada}.admin-actions{display:flex;gap:10px;margin:15px 0;flex-wrap:wrap}.admin-table-wrap{overflow:auto;border:1px solid #e0e4ed;border-radius:12px}table{width:100%;border-collapse:collapse;background:#fff}th,td{padding:11px;border-bottom:1px solid #e9ebf0;text-align:left;white-space:nowrap}th{background:#f4f6fb}.admin-note{background:#fff8e8;padding:15px;border-radius:10px;font-size:.9rem}@media(max-width:560px){.admin-stats{grid-template-columns:1fr}.quiz-picker{display:grid;grid-template-columns:1fr 1fr}}


/* Post-submit answer review */
.question.answer-correct{border-left:5px solid #16a34a;background:#f0fdf4;}
.question.answer-wrong{border-left:5px solid #dc2626;background:#fef2f2;}
.question label.option-correct{border:2px solid #16a34a !important;background:#dcfce7 !important;color:#166534;}
.question label.option-wrong{border:2px solid #dc2626 !important;background:#fee2e2 !important;color:#991b1b;}
.answer-review{display:grid;gap:10px;margin-top:18px;}
.answer-review-item{padding:12px 14px;border-radius:10px;border-left:5px solid;}
.review-correct{background:#f0fdf4;border-color:#16a34a;}
.review-wrong{background:#fef2f2;border-color:#dc2626;}
.review-correct strong{color:#166534;}
.review-wrong strong{color:#991b1b;}
.result-summary{display:flex;gap:18px;flex-wrap:wrap;align-items:center;margin-bottom:8px;}

.admin-filters{display:grid;grid-template-columns:2fr 1fr 1fr;gap:10px;margin:15px 0}.admin-filters input,.admin-filters select{padding:11px 12px;border:1px solid #dce1ea;border-radius:9px;background:#fff}.small-admin-btn{border:1px solid #e0a0a0;background:#fff5f5;color:#a11;padding:6px 9px;border-radius:7px;cursor:pointer}.save-confirmation{color:#198754!important;font-weight:700}.save-warning{color:#b42318!important;font-weight:700}.answer-review{display:none}.question.answer-correct,.question.answer-wrong{border-width:2px}.result-summary{display:flex;justify-content:space-between;gap:12px;align-items:center}.result-summary span{font-size:.9rem;font-weight:600}@media(max-width:700px){.admin-filters{grid-template-columns:1fr}}

.admin-login label{display:block;min-width:280px}.admin-login input{width:100%;box-sizing:border-box;pointer-events:auto;user-select:text;-webkit-user-select:text}.admin-login input:focus{outline:2px solid #6573ff;outline-offset:1px}