.knowledge-page { --ink: #253b4a; --muted: #637a82; --yellow: #ffc857; --orange: #ff815e; --teal: #39bda8; --blue: #568fe8; --paper: #fff; margin: 0; color: var(--ink); background: #f4fbf5; font-family: "Be Vietnam Pro", sans-serif; }
.knowledge-shell { min-height: 100vh; overflow: hidden; background: radial-gradient(circle at 90% 4%, #fff0bf 0 10rem, transparent 23rem), radial-gradient(circle at 5% 40%, #d9f2ed 0 12rem, transparent 25rem), #f4fbf5; }
.knowledge-topbar { max-width: 1124px; height: 78px; margin: auto; padding: 0 26px; display: flex; align-items: center; justify-content: space-between; }.knowledge-topbar .brand { color: var(--ink); }.knowledge-topbar .brand-mark { background: var(--orange); box-shadow: 0 4px 0 #d95c59; }.knowledge-back { padding: 9px 13px; border: 1px solid #cce4da; border-radius: 99px; color: #3a7770; background: rgba(255,255,255,.65); text-decoration: none; font-size: 11px; font-weight: 800; }.knowledge-back:hover { background: #fff; }
.knowledge-hero { max-width: 1124px; min-height: 330px; margin: auto; padding: 48px 26px 28px; display: grid; grid-template-columns: 1fr 360px; align-items: center; gap: 35px; }.knowledge-hero h1 { margin: 0; font: 800 clamp(42px, 6vw, 68px)/.94 "Baloo 2", sans-serif; letter-spacing: -1.8px; }.knowledge-hero h1 em { color: var(--blue); font-style: normal; }.knowledge-hero p:not(.eyebrow) { max-width: 560px; margin: 20px 0 0; color: var(--muted); font-size: 14px; line-height: 1.7; }.knowledge-hero-art { position: relative; min-height: 230px; display: flex; align-items: center; justify-content: center; gap: 8px; transform: rotate(-4deg); }.knowledge-hero-art::before { content: ""; position: absolute; inset: 6px 22px 20px; border: 3px dashed #a8daca; border-radius: 48% 52% 40% 60%; background: #dff6ec; }.knowledge-hero-art span, .knowledge-hero-art i { position: relative; display: grid; place-items: center; width: 83px; height: 100px; border: 4px solid var(--ink); border-radius: 20px 15px 22px 9px; color: var(--ink); background: #ffdfa7; box-shadow: 0 6px 0 var(--ink); font: 800 62px/1 "Baloo 2", sans-serif; }.knowledge-hero-art span:last-of-type { margin-top: 44px; background: #cde3fb; }.knowledge-hero-art b { position: relative; color: var(--orange); font: 800 35px "Baloo 2", sans-serif; }.knowledge-hero-art i { position: absolute; right: 28px; top: 23px; width: 54px; height: 54px; border-radius: 50%; color: #fff; background: var(--coral, #f16f8d); font-size: 30px; transform: rotate(12deg); }.knowledge-hero-art small { position: absolute; left: 0; right: 0; bottom: 2px; z-index: 1; color: #4c8d7d; font-size: 9px; font-weight: 800; letter-spacing: 1px; text-align: center; }
.knowledge-summary { max-width: 1072px; margin: 0 auto; padding: 17px 22px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; border: 2px solid #d6ebe1; border-radius: 21px 21px 21px 7px; background: rgba(255,255,255,.78); box-shadow: 0 7px 0 #deeee7; }.knowledge-summary div { display: flex; align-items: center; justify-content: center; gap: 9px; }.knowledge-summary strong { color: var(--orange); font: 800 28px "Baloo 2", sans-serif; }.knowledge-summary span { color: var(--muted); font-size: 10px; font-weight: 700; }
.knowledge-list { max-width: 1124px; margin: auto; padding: 78px 26px 42px; }.knowledge-heading { display: flex; align-items: end; justify-content: space-between; margin-bottom: 22px; }.knowledge-heading h2 { margin: 0; font: 800 38px/1 "Baloo 2", sans-serif; }.knowledge-note { padding: 8px 12px; border-radius: 99px; color: #3a7770; background: #d7f3e8; font-size: 10px; font-weight: 800; }.knowledge-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }.knowledge-card { position: relative; min-height: 290px; display: flex; flex-direction: column; padding: 19px 20px 17px; overflow: hidden; border: 2px solid rgba(37,59,74,.07); border-radius: 21px 21px 21px 7px; background: #fff; box-shadow: 0 6px 0 rgba(37,59,74,.08); transition: transform .2s, box-shadow .2s; }.knowledge-card:hover { transform: translateY(-5px); box-shadow: 0 12px 0 rgba(37,59,74,.1); }.knowledge-card::after { content: ""; position: absolute; right: -35px; top: -35px; width: 115px; height: 115px; border-radius: 50%; background: rgba(255,255,255,.38); }.knowledge-number { position: absolute; top: 15px; right: 18px; z-index: 1; color: rgba(37,59,74,.4); font: 800 12px "Baloo 2", sans-serif; }.knowledge-icon { position: relative; z-index: 1; display: grid; place-items: center; width: 52px; height: 52px; margin-bottom: 14px; border-radius: 16px; color: #fff; background: var(--blue); font-size: 26px; box-shadow: 0 4px 0 rgba(37,59,74,.13); }.knowledge-card h3 { position: relative; z-index: 1; margin: 0; font: 800 23px/1.02 "Baloo 2", sans-serif; }.knowledge-card > p { position: relative; z-index: 1; min-height: 47px; margin: 7px 0 12px; color: #5d737a; font-size: 11px; line-height: 1.5; }.remember { position: relative; z-index: 1; display: grid; gap: 3px; padding: 9px 10px; border-radius: 11px; background: rgba(255,255,255,.58); font-size: 10px; }.remember b { color: #3c7168; font-size: 9px; text-transform: uppercase; letter-spacing: .7px; }.remember span::before { content: "✓"; margin-right: 5px; color: #3d9b85; font-weight: 800; }.knowledge-link { position: relative; z-index: 1; display: flex; justify-content: space-between; align-items: center; margin-top: auto; padding-top: 13px; color: var(--ink); text-decoration: none; font-size: 11px; font-weight: 800; }.knowledge-link span { color: var(--orange); font-size: 20px; transition: transform .2s; }.knowledge-card:hover .knowledge-link span { transform: translateX(5px); }.kc-orange { background: #ffddb0; }.kc-blue { background: #cfe2fb; }.kc-teal { background: #c8efe2; }.kc-coral { background: #ffd5dd; }.kc-purple { background: #e1d9f6; }.kc-green { background: #d2f0d6; }.kc-yellow { background: #fff0bc; }.kc-pink { background: #f9d8e8; }.kc-sky { background: #d4eef8; }.kc-dark { color: #f3fffa; background: linear-gradient(140deg, #2b5360, #27424f); }.kc-dark > p { color: #c2ddd5; }.kc-dark .knowledge-number { color: #b1d9cd; }.kc-dark .remember { background: rgba(255,255,255,.1); }.kc-dark .remember b { color: #ffe08a; }.kc-dark .remember span::before { color: #ffe08a; }.kc-dark .knowledge-link { color: #fff; }
.study-loop { max-width: 1072px; margin: 12px auto 44px; padding: 15px 18px; display: flex; align-items: center; justify-content: center; gap: 10px; border-top: 1px solid #d6ebe1; color: #4e7774; font-size: 10px; font-weight: 800; }.study-loop span { display: grid; place-items: center; width: 25px; height: 25px; border-radius: 50%; color: #fff; background: var(--teal); }.study-loop i { color: var(--orange); font-size: 18px; font-style: normal; }.knowledge-shell footer { max-width: 1124px; padding: 23px 26px 30px; margin: auto; border-top: 1px solid #d6ebe1; color: var(--muted); font-size: 10px; }.knowledge-shell footer { display: flex; justify-content: space-between; }.knowledge-shell footer a { color: #3a7770; font-weight: 800; text-decoration: none; }
@media (max-width: 850px) { .knowledge-hero { grid-template-columns: 1fr; }.knowledge-hero-art { max-width: 360px; margin: -20px auto 0; }.knowledge-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 540px) { .knowledge-topbar { height: 68px; padding: 0 18px; }.knowledge-topbar .brand { font-size: 21px; }.knowledge-back { font-size: 9px; }.knowledge-hero { min-height: 0; padding: 38px 18px 28px; }.knowledge-hero h1 { font-size: 48px; }.knowledge-hero p:not(.eyebrow) { font-size: 12px; }.knowledge-hero-art { transform: scale(.8) rotate(-4deg); margin: -15px -38px -10px; }.knowledge-summary { margin: 0 18px; padding: 12px 8px; }.knowledge-summary div { display: grid; gap: 0; text-align: center; }.knowledge-summary strong { font-size: 25px; }.knowledge-summary span { font-size: 8px; }.knowledge-list { padding: 56px 18px 28px; }.knowledge-heading { align-items: start; gap: 8px; }.knowledge-heading h2 { font-size: 30px; }.knowledge-note { font-size: 8px; }.knowledge-grid { grid-template-columns: 1fr; gap: 13px; }.knowledge-card { min-height: 260px; }.study-loop { margin: 10px 18px 30px; flex-wrap: wrap; }.knowledge-shell footer { padding: 20px 18px 26px; } }

.knowledge-study { position: relative; z-index: 1; width: 100%; margin-top: 13px; padding: 10px 12px; border: 0; border-radius: 11px 11px 11px 4px; color: #fff; background: #3c8177; font-size: 11px; font-weight: 800; cursor: pointer; }.knowledge-study:hover { background: #286a64; transform: translateY(-1px); }.knowledge-link { padding-top: 10px; }
.lesson-room { max-width: 1072px; margin: 10px auto 44px; padding: 26px; border: 2px solid #cfe6dc; border-radius: 25px 25px 25px 8px; background: #fff; box-shadow: 0 9px 0 #deeee7; }.lesson-room[hidden] { display: none; }.lesson-room-top { display: flex; align-items: end; justify-content: space-between; gap: 15px; }.lesson-room-top h2 { margin: 0; font: 800 35px/1 "Baloo 2", sans-serif; }.lesson-close { padding: 9px 12px; border: 1px solid #cfe1db; border-radius: 99px; color: #57757a; background: #f5fbf6; font-size: 10px; font-weight: 800; }.lesson-close:hover { color: #fff; background: #3c8177; }.lesson-room-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 17px; margin-top: 22px; }.lesson-notes, .lesson-practice { min-width: 0; padding: 19px; border-radius: 18px 18px 18px 6px; }.lesson-notes { background: #e8f7ef; }.lesson-practice { color: #f5fffa; background: linear-gradient(145deg, #2d5660, #25424f); }.room-label { display: block; margin-bottom: 11px; color: #3b8578; font-size: 9px; font-weight: 800; letter-spacing: 1px; }.lesson-practice .room-label { color: #ffe08a; }.lesson-notes ul { display: grid; gap: 10px; margin: 0; padding-left: 20px; color: #42666a; font-size: 12px; line-height: 1.5; }.lesson-notes li::marker { color: #3caa8f; }.lesson-example { margin-top: 18px; padding: 12px; border: 1px solid #c2e6d8; border-radius: 11px; background: rgba(255,255,255,.62); }.lesson-example span { color: #398777; font-size: 9px; font-weight: 800; text-transform: uppercase; }.lesson-example p { margin: 5px 0 0; color: #294e58; font-size: 12px; line-height: 1.5; }.practice-heading { display: flex; justify-content: space-between; align-items: start; }.practice-heading strong { color: #ffe08a; font: 800 18px "Baloo 2", sans-serif; }.lesson-practice h3 { min-height: 58px; margin: 6px 0 15px; color: #fff; font: 700 18px/1.5 "Be Vietnam Pro", sans-serif; }.lesson-answers { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }.lesson-answer { min-height: 54px; padding: 10px; border: 2px solid #6d9991; border-radius: 13px 13px 13px 5px; color: #fff; background: #315b65; font: 800 17px "Baloo 2", sans-serif; cursor: pointer; }.lesson-answer:hover:not(:disabled) { border-color: #ffe08a; background: #426f76; transform: translateY(-2px); }.lesson-answer.correct { border-color: #7ee0bf; background: #237b70; }.lesson-answer.wrong { border-color: #ff9e91; background: #9b4e4a; }.lesson-feedback { min-height: 42px; margin: 13px 0 0; color: #ffe08a; font-size: 11px; line-height: 1.5; }.lesson-next { width: 100%; min-height: 48px; border: 0; border-radius: 13px 13px 13px 5px; color: #253b4a; background: #ffc857; font-size: 12px; font-weight: 800; box-shadow: 0 4px 0 #dca94a; }.lesson-next:disabled { cursor: not-allowed; opacity: .4; }.room-main-link { display: block; margin-top: 18px; color: #3b8177; font-size: 11px; font-weight: 800; text-decoration: none; }.room-main-link:hover { color: #e06f5d; }
.lesson-result { margin: 0 0 12px; padding: 13px 14px; border: 1px solid #5cc6a4; border-radius: 13px; color: #173d45; background: #d9f6e8; font-size: 13px; font-weight: 800; line-height: 1.5; }
.lesson-retry { width: 100%; min-height: 44px; margin-top: 11px; border: 2px solid #ffd978; border-radius: 13px 13px 13px 5px; color: #ffe08a; background: transparent; font-size: 12px; font-weight: 800; cursor: pointer; }
.lesson-retry:hover { color: #253b4a; background: #ffd978; }
.kc-indigo { background: #d8ddf8; }.kc-lime { background: #e1f1b8; }.kc-aqua { background: #c7edf0; }.kc-violet { background: #e4d8fa; }.kc-sand { background: #f8e3bf; }.kc-rose { background: #f8d5d8; }.kc-navy { color: #f3fffa; background: linear-gradient(140deg, #315b70, #284351); }.kc-navy > p { color: #c7e0db; }.kc-navy .knowledge-number { color: #b9d8d3; }.kc-navy .remember { background: rgba(255,255,255,.1); }.kc-navy .remember b, .kc-navy .knowledge-link { color: #ffe08a; }.kc-navy .remember span::before { color: #ffe08a; }
.final-exam { max-width: 1072px; margin: 56px auto 42px; padding: 28px; border: 2px solid #d8e8df; border-radius: 27px 27px 27px 8px; background: #fffdf7; box-shadow: 0 9px 0 #e8eee6; }.final-exam-head { display: flex; justify-content: space-between; align-items: start; gap: 25px; }.final-exam h2 { margin: 0; color: #244c59; font: 800 38px/1.05 "Baloo 2", sans-serif; }.final-exam-head p:not(.eyebrow) { max-width: 650px; margin: 9px 0 0; color: #597278; font-size: 12px; line-height: 1.6; }.exam-badge { min-width: 145px; padding: 13px 16px; border-radius: 17px 17px 17px 5px; color: #fff; background: #315f68; text-align: center; }.exam-badge strong { display: block; color: #ffe08a; font: 800 34px/1 "Baloo 2", sans-serif; }.exam-badge span, .exam-badge small { display: block; font-weight: 800; }.exam-badge span { margin-top: 3px; font-size: 10px; }.exam-badge small { margin-top: 7px; color: #c4dfd8; font-size: 8px; line-height: 1.35; }.exam-guidance { display: flex; flex-wrap: wrap; gap: 9px; margin: 21px 0 17px; }.exam-guidance span { padding: 8px 11px; border-radius: 99px; color: #3e746f; background: #e3f5ea; font-size: 10px; font-weight: 800; }.exam-picker { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 15px; }.exam-tab { min-width: 160px; padding: 11px 14px; border: 2px solid #cfe4d9; border-radius: 13px 13px 13px 5px; color: #3b706d; background: #f3faf4; font: 800 14px "Baloo 2", sans-serif; cursor: pointer; }.exam-tab small { display: block; margin-top: 2px; font: 600 9px "Be Vietnam Pro", sans-serif; }.exam-tab.active, .exam-tab:hover { border-color: #3c8177; color: #fff; background: #3c8177; }.exam-question-list { display: grid; gap: 14px; }.exam-question { padding: 17px 18px 18px; border: 2px solid #d9e8df; border-radius: 17px 17px 17px 6px; background: #fff; transition: border-color .2s, background .2s; }.exam-question.is-correct { border-color: #80cdb0; background: #f5fff9; }.exam-question.is-wrong { border-color: #f0b6a8; background: #fff9f5; }.exam-question-heading { display: flex; align-items: center; gap: 8px; }.exam-question-number { color: #fff; background: #e47761; border-radius: 8px; padding: 5px 8px; font-size: 10px; font-weight: 800; }.exam-question-topic { color: #3c8177; font-size: 10px; font-weight: 800; }.exam-question-prompt { margin: 11px 0 14px; color: #234951; font: 700 17px/1.5 "Be Vietnam Pro", sans-serif; }.exam-question label { display: block; margin-top: 10px; color: #547176; font-size: 10px; font-weight: 800; }.exam-question input, .exam-question textarea { display: block; width: 100%; box-sizing: border-box; margin-top: 6px; border: 2px solid #cfe2d9; border-radius: 11px 11px 11px 4px; outline: 0; color: #254b55; background: #fbfffc; font: 600 14px "Be Vietnam Pro", sans-serif; }.exam-question input { min-height: 45px; padding: 9px 12px; }.exam-question textarea { min-height: 75px; padding: 10px 12px; resize: vertical; line-height: 1.5; }.exam-question input:focus, .exam-question textarea:focus { border-color: #3c8177; box-shadow: 0 0 0 3px rgba(60,129,119,.12); }.exam-question-feedback { margin-top: 13px; padding: 12px 13px; border-radius: 11px; color: #37575b; background: #eef8f1; font-size: 11px; line-height: 1.55; }.is-wrong .exam-question-feedback { background: #fff0e9; }.exam-question-feedback strong, .exam-question-feedback span, .exam-question-feedback p { display: block; }.exam-question-feedback strong { color: #2d8170; font-size: 12px; }.is-wrong .exam-question-feedback strong { color: #bc5f4e; }.exam-question-feedback span { margin-top: 2px; }.exam-question-feedback p { margin: 7px 0 0; }.exam-diagram { max-width: 430px; margin: 2px auto 13px; padding: 6px; border: 1px solid #d8e8df; border-radius: 13px; background: #f8fcf8; }.exam-diagram svg { display: block; width: 100%; height: auto; overflow: visible; }.exam-diagram text { fill: #315f68; font: 700 12px "Be Vietnam Pro", sans-serif; }.exam-submit-row { display: flex; gap: 10px; margin-top: 19px; }.exam-submit, .exam-reset { min-height: 49px; border: 0; border-radius: 13px 13px 13px 5px; font-size: 12px; font-weight: 800; cursor: pointer; }.exam-submit { flex: 1; color: #fff; background: #e47761; box-shadow: 0 4px 0 #bd604f; }.exam-submit:hover { background: #d25f4d; }.exam-reset { padding: 0 18px; color: #3c8177; background: #dff3e8; }.exam-reset:hover { background: #c9e9db; }.exam-result { margin-top: 19px; padding: 17px; border: 2px solid #7bcbae; border-radius: 15px 15px 15px 5px; color: #234c53; background: #e5f9ed; }.exam-result strong, .exam-result span, .exam-result small { display: block; }.exam-result strong { color: #257b6b; font: 800 23px "Baloo 2", sans-serif; }.exam-result span { margin-top: 4px; font-size: 11px; font-weight: 800; }.exam-result small { margin-top: 8px; color: #597278; font-size: 10px; }
@media (max-width: 720px) { .lesson-room { margin: 10px 18px 35px; padding: 18px; }.lesson-room-top { align-items: start; flex-direction: column; }.lesson-room-top h2 { font-size: 31px; }.lesson-close { align-self: flex-end; }.lesson-room-grid { grid-template-columns: 1fr; } }
@media (max-width: 420px) { .lesson-answers { grid-template-columns: 1fr; }.lesson-answer { min-height: 50px; }.knowledge-study { font-size: 10px; } }
.exam-work-label { margin-top: 15px !important; }.exam-work-input { min-height: 112px !important; padding: 13px 14px !important; color: #214b55 !important; font: 600 14px/1.8 "Cascadia Mono", "Courier New", monospace !important; background-color: #fffef8 !important; background-image: repeating-linear-gradient(to bottom, transparent 0, transparent 27px, rgba(60,129,119,.16) 28px, transparent 29px) !important; }.exam-work-hint { display: block; margin-top: 5px; color: #7a9290; font-size: 9px; font-weight: 600; line-height: 1.45; }
.lesson-visual { margin: 8px 0 14px; }.lesson-visual .exam-diagram { max-width: 360px; margin: 0 auto; padding: 4px; background: rgba(255,255,255,.96); }.lesson-visual .exam-diagram text { font-size: 10px; }
@media (max-width: 620px) { .final-exam { margin: 38px 18px 30px; padding: 18px; }.final-exam-head { display: block; }.final-exam h2 { font-size: 31px; }.exam-badge { width: fit-content; margin-top: 16px; }.exam-submit-row { display: grid; }.exam-reset { min-height: 44px; }.exam-question-prompt { font-size: 15px; } }