/* KIS Tutor — Tutor LMS와 유사한 레이아웃의 자체 스타일 */
:root{--kt-blue:#3e64de;--kt-blue-dark:#2f4dc2;--kt-green:#0e9f6e;--kt-red:#e02424;--kt-ink:#1d2939;--kt-gray:#667085;--kt-line:#e4e7ec;--kt-bg:#f7f8fa;}
.kt-wrap{max-width:1180px;margin:0 auto;padding:0 16px 60px;font-size:16px;line-height:1.6;color:var(--kt-ink);}
.kt-container{max-width:1180px;margin:0 auto;padding:0 16px;}
.kt-crumb{margin:20px 0 8px;font-size:14px;color:var(--kt-gray);}
.kt-crumb a{color:var(--kt-blue);text-decoration:none;}
.kt-page-title{font-size:28px;margin:8px 0 18px;}
.kt-empty{color:var(--kt-gray);padding:24px;text-align:center;background:var(--kt-bg);border-radius:8px;}
.kt-prose img{max-width:100%;height:auto;}
.kt-prose h1,.kt-prose h2,.kt-prose h3{margin:1em 0 .4em;}
.kt-prose p{margin:.6em 0;}
.kt-prose ul,.kt-prose ol{padding-left:24px;}

/* 히어로 */
.kt-archive-hero,.kt-course-hero{position:relative;background:linear-gradient(135deg,#232a5c 0%,#3e64de 100%);color:#fff;padding:56px 0;}
.kt-hero-title{font-size:32px;font-weight:800;margin:0 0 8px;}
.kt-hero-sub{opacity:.92;margin:0;}
.kt-hero-stats{margin-top:14px;display:flex;gap:22px;font-size:14px;opacity:.95;}
.kt-course-hero{overflow:hidden;}
.kt-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.45) blur(2px);transform:scale(1.04);}
.kt-hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(35,42,92,.78),rgba(62,100,222,.62));}
.kt-course-hero-inner,.kt-archive-hero .kt-container{position:relative;}
.kt-hero-crumb{margin:0 0 6px;font-size:14px;opacity:.9;}
.kt-hero-crumb a{color:#fff;text-decoration:none;opacity:.9;}
.kt-hero-meta{display:flex;flex-wrap:wrap;gap:16px;margin-top:14px;font-size:14px;opacity:.95;}

/* 카드 그리드 */
.kt-archive-grid-wrap{padding-top:28px;}
.kt-filter-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:22px;}
.kt-filter-btn{display:inline-block;padding:8px 16px;border:1px solid var(--kt-line);border-radius:99px;background:#fff;color:var(--kt-ink);text-decoration:none;font-size:14px;font-weight:600;}
.kt-filter-btn span{color:var(--kt-gray);font-weight:500;}
.kt-filter-btn.active{background:var(--kt-blue);border-color:var(--kt-blue);color:#fff;}
.kt-filter-btn.active span{color:rgba(255,255,255,.85);}
.kt-filter-total{margin-left:auto;font-size:13px;color:var(--kt-gray);}
.kt-search{margin-top:16px;display:flex;gap:8px;max-width:420px;}
.kt-search input{flex:1;padding:10px 14px;border:0;border-radius:8px;font-size:14px;}
.kt-search-btn{border:0;border-radius:8px;background:#fff;color:var(--kt-blue);font-weight:700;padding:10px 18px;cursor:pointer;}
.kt-card-progressbar{height:5px;border-radius:99px;background:#eef1f6;overflow:hidden;}
.kt-card-progressbar span{display:block;height:100%;background:var(--kt-green);}
.kt-badge-done{background:#ecfdf3;color:var(--kt-green);}
.kt-hero-cats{display:flex;gap:6px;margin:6px 0 4px;flex-wrap:wrap;}
.kt-hero-cats .kt-badge{background:rgba(255,255,255,.2);color:#fff;}
.kt-pagination{display:flex;gap:6px;justify-content:center;margin-top:28px;}
.kt-page-num{min-width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--kt-line);border-radius:8px;background:#fff;color:var(--kt-ink);text-decoration:none;font-weight:600;}
.kt-page-num.current{background:var(--kt-blue);border-color:var(--kt-blue);color:#fff;}

/* 퀴즈 추가 요소 */
.kt-timer{font-size:18px;font-weight:800;color:var(--kt-red);background:#fef3f2;border:1px solid #fecdca;border-radius:8px;padding:8px 16px;display:inline-block;margin-bottom:12px;}
.kt-q-overview{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px;}
.kt-q-ov-btn{width:34px;height:34px;border-radius:8px;border:1px solid var(--kt-line);background:#fff;font-weight:700;cursor:pointer;}
.kt-q-ov-btn.done{background:#ecfdf3;border-color:var(--kt-green);color:var(--kt-green);}
.kt-q-ov-btn.current{background:var(--kt-blue);border-color:var(--kt-blue);color:#fff;}
.kt-q-nav{margin-top:12px;display:flex;gap:14px;justify-content:space-between;}
.kt-q-nav .button-link{color:var(--kt-blue);font-weight:700;text-decoration:none;cursor:pointer;background:none;border:0;font-size:14px;padding:6px 0;}
.kt-locked{border-left:4px solid #eaaa08;}
.kt-inline-cta{width:auto;margin:8px 0;}
.kt-course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;}
.kt-course-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--kt-line);border-radius:12px;overflow:hidden;text-decoration:none;color:inherit;transition:box-shadow .15s,transform .15s;}
.kt-course-card:hover{box-shadow:0 10px 30px rgba(16,24,40,.12);transform:translateY(-2px);}
.kt-card-thumb{aspect-ratio:16/9;background:#eef1f6;overflow:hidden;}
.kt-card-thumb img{width:100%;height:100%;object-fit:cover;display:block;}
.kt-card-body{padding:16px 18px 14px;display:flex;flex-direction:column;gap:8px;flex:1;}
.kt-badge{display:inline-block;font-size:12px;padding:2px 10px;border-radius:99px;background:#eef2ff;color:var(--kt-blue);font-weight:600;width:max-content;}
.kt-card-title{font-size:17px;font-weight:700;margin:0;line-height:1.4;min-height:2.8em;}
.kt-card-info{display:flex;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--kt-gray);}
.kt-card-footer{margin-top:auto;display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--kt-line);padding-top:10px;font-size:13px;color:var(--kt-gray);}
.kt-card-progress{font-weight:700;color:var(--kt-blue);}

/* 코스 상세 본문 */
.kt-course-body{display:grid;grid-template-columns:1fr 320px;gap:28px;padding-top:30px;align-items:start;}
.kt-panel{background:#fff;border:1px solid var(--kt-line);border-radius:12px;padding:22px 24px;margin-bottom:24px;}
.kt-panel-title{font-size:18px;margin:0 0 14px;}
.kt-course-side{position:sticky;top:24px;}
.kt-side-card{background:#fff;border:1px solid var(--kt-line);border-radius:12px;padding:20px;}
.kt-progress-head{font-weight:700;margin-bottom:10px;font-size:15px;}
.kt-progress-head a{color:var(--kt-ink);text-decoration:none;}
.kt-progress-bar{height:8px;border-radius:99px;background:#eef1f6;overflow:hidden;}
.kt-progress-bar span{display:block;height:100%;background:linear-gradient(90deg,var(--kt-blue),#6d8dff);border-radius:99px;transition:width .3s;}
.kt-progress-num{font-size:13px;color:var(--kt-gray);margin:8px 0 14px;}
.kt-cta{display:inline-block;background:var(--kt-blue);color:#fff !important;font-weight:700;border:0;border-radius:8px;padding:12px 22px;font-size:15px;cursor:pointer;text-decoration:none;text-align:center;width:100%;box-sizing:border-box;}
.kt-cta:hover{background:var(--kt-blue-dark);}
.kt-btn-ghost{display:inline-block;border:1px solid var(--kt-line);background:#fff;color:var(--kt-ink);border-radius:8px;padding:11px 20px;text-decoration:none;cursor:pointer;font-size:15px;}
.kt-complete-note{background:#ecfdf3;color:var(--kt-green);font-weight:700;border-radius:8px;padding:12px;text-align:center;font-size:14px;}
.kt-side-stats{list-style:none;margin:14px 0 0;padding:12px 0 0;border-top:1px solid var(--kt-line);font-size:14px;color:var(--kt-gray);}

/* 아코디언 목차 */
.kt-acc-item{border:1px solid var(--kt-line);border-radius:10px;margin-bottom:10px;overflow:hidden;background:#fff;}
.kt-acc-head{width:100%;display:flex;align-items:center;gap:10px;background:var(--kt-bg);border:0;padding:14px 16px;font-size:15px;font-weight:700;cursor:pointer;text-align:left;}
.kt-acc-title{flex:1;}
.kt-acc-count{font-size:12px;color:var(--kt-gray);font-weight:500;}
.kt-acc-arrow{transition:transform .15s;color:var(--kt-gray);}
.kt-acc-head.open .kt-acc-arrow{transform:rotate(180deg);}
.kt-acc-body{padding:6px 10px 10px;}
.kt-content-row{display:flex;align-items:center;gap:10px;padding:10px 8px;border-radius:8px;text-decoration:none;color:var(--kt-ink);font-size:14px;}
.kt-content-row:hover{background:#f4f6ff;}
.kt-content-icon{width:26px;height:26px;border-radius:6px;display:inline-flex;align-items:center;justify-content:center;font-size:12px;color:#fff;flex:0 0 auto;}
.kt-icon-lesson{background:var(--kt-blue);}
.kt-icon-tutor_quiz{background:#7a5af8;}
.kt-icon-tutor_assignments{background:#eaaa08;}
.kt-content-title{flex:1;}
.kt-content-right{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--kt-gray);}
.kt-done{color:var(--kt-green);font-weight:800;}

/* 레슨 */
.kt-lesson-layout{display:grid;grid-template-columns:1fr 320px;gap:28px;align-items:start;padding-top:8px;}
.kt-lesson-main{min-width:0;}
.kt-lesson-title{font-size:26px;margin:16px 0 12px;}
.kt-video{position:relative;padding-top:56.25%;border-radius:12px;overflow:hidden;background:#000;margin-bottom:6px;}
.kt-video iframe{position:absolute;inset:0;width:100%;height:100%;border:0;}
.kt-lesson-actions{display:flex;gap:10px;align-items:center;margin-top:26px;flex-wrap:wrap;}
.kt-btn-complete{width:auto;}
.kt-btn-complete[disabled]{background:#98a2b3;cursor:not-allowed;font-weight:600;}
.kt-video-note{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--kt-gray);margin-top:8px;}
.kt-video-note a{color:var(--kt-blue);text-decoration:none;}
.kt-done-label{color:var(--kt-green);font-weight:700;}
.kt-lesson-side{position:sticky;top:24px;}
.kt-side-topic{margin-top:16px;}
.kt-side-topic-name{font-weight:700;font-size:13px;color:var(--kt-gray);margin-bottom:6px;}
.kt-side-item{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:8px;text-decoration:none;color:var(--kt-ink);font-size:13px;}
.kt-side-item:hover{background:#f4f6ff;}
.kt-side-item.active{background:#eef2ff;font-weight:700;}
.kt-side-item-icon{width:22px;height:22px;border-radius:5px;display:inline-flex;align-items:center;justify-content:center;font-size:10px;color:#fff;flex:0 0 auto;}
.kt-side-item-title{flex:1;min-width:0;}

/* 퀴즈 */
.kt-narrow{max-width:860px;}
.kt-quiz-facts{list-style:none;display:flex;flex-wrap:wrap;gap:10px 22px;padding:0;margin:0 0 8px;font-size:14px;color:var(--kt-gray);}
.kt-quiz-facts strong{color:var(--kt-ink);}
.kt-pass{color:var(--kt-green);}
.kt-fail{color:var(--kt-red);}
.kt-quiz-desc{margin-top:6px;}
.kt-question-block{border:1px solid var(--kt-line);border-radius:10px;padding:16px 18px;margin-bottom:14px;}
.kt-q-title{font-size:16px;margin:0 0 10px;}
.kt-q-num{color:var(--kt-blue);margin-right:4px;}
.kt-q-mark{font-size:13px;color:var(--kt-gray);font-weight:500;}
.kt-answer-opt{display:flex;align-items:center;gap:10px;border:1px solid var(--kt-line);border-radius:8px;padding:10px 14px;margin:6px 0;cursor:pointer;font-size:14px;}
.kt-answer-opt:hover{border-color:var(--kt-blue);background:#f6f8ff;}
.kt-quiz-submit-row{margin-top:16px;display:flex;align-items:center;gap:14px;}
.kt-quiz-msg{color:var(--kt-red);font-size:14px;}
.kt-result-score{font-size:34px;font-weight:800;margin-bottom:6px;}
.kt-result-pass{font-size:16px;margin-bottom:16px;}
.kt-result-actions{display:flex;gap:12px;}
.kt-q-review{margin-top:10px;font-size:14px;font-weight:700;}
.kt-q-review.ok{color:var(--kt-green);}
.kt-q-review.no{color:var(--kt-red);}

/* 과제 */
.kt-textarea{width:100%;box-sizing:border-box;border:1px solid var(--kt-line);border-radius:8px;padding:12px;font-size:15px;}
.kt-submitted{background:var(--kt-bg);border-radius:8px;padding:12px 16px;}
.kt-submitted-at{font-size:13px;color:var(--kt-gray);}

@media (max-width:900px){
	.kt-course-body,.kt-lesson-layout{grid-template-columns:1fr;}
	.kt-course-side,.kt-lesson-side{position:static;}
	.kt-hero-title{font-size:24px;}
}