:root{
  color-scheme:light;
  --bg:#f6f9ff; --card:rgba(255,255,255,.72); --text:#15213b; --muted:#52627a;
  --accent:#006874; --accent2:#0054b4; --accent3:#6d28d9; --accent-soft:rgba(230,255,252,.7); --border:rgba(38,104,132,.36);
  --glass:rgba(255,255,255,.68);
  --body-bg:radial-gradient(circle at 8% 3%,rgba(145,216,255,.68),transparent 30%),radial-gradient(circle at 92% 12%,rgba(204,187,255,.55),transparent 28%),linear-gradient(145deg,#f9fcff 0%,#eff6ff 52%,#f8f5ff 100%);
  --header-bg:rgba(255,255,255,.58); --input-bg:rgba(255,255,255,.72); --nav-bg:rgba(248,252,255,.96);
  --shadow:0 20px 55px rgba(77,111,166,.15);
}
*{box-sizing:border-box}
body {
    position: relative;
    isolation: isolate;
    display: flex;
    min-height: 100vh;
    margin: 0;
    flex-direction: column;
    font-family: Inter, Segoe UI, Arial, sans-serif;
    background: #f6f9ff;
    color: var(--text);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background: var(--body-bg);
    pointer-events: none;
    transform: translateZ(0);
}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #7c3aed;outline-offset:3px}
.site-header{position:sticky;top:0;z-index:10;display:flex;justify-content:space-between;align-items:center;padding:14px 7%;backdrop-filter:blur(14px);background:var(--header-bg);border-bottom:1px solid rgba(255,255,255,.72);box-shadow:0 8px 30px rgba(84,111,158,.08)}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:1.35rem;letter-spacing:-.04em}
.brand-mark{position:relative;display:grid;place-items:center;width:40px;height:40px;border-radius:50% 50% 50% 14px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:white;font-size:.76rem;letter-spacing:.02em;box-shadow:0 10px 24px rgba(22,119,232,.25);transform:rotate(-7deg)}
.brand-mark::after{content:"";position:absolute;width:46px;height:46px;border:1px solid rgba(8,127,140,.26);border-radius:50%;transform:rotate(35deg)}
.brand-accent{color:var(--accent)}
.nav{display:flex;gap:18px;align-items:center;justify-content:flex-end;flex-wrap:wrap}
.nav a{color:var(--muted);font-weight:600}
.nav a:hover{color:var(--accent)}
.nav a.btn{border:1px solid rgba(255,255,255,.76);background:linear-gradient(135deg,rgba(0,104,116,.88),rgba(0,84,180,.86));color:#fff;box-shadow:0 10px 24px rgba(0,84,180,.2),inset 0 1px 0 rgba(255,255,255,.28);backdrop-filter:blur(14px)}
.nav a.btn:hover{color:#fff;background:linear-gradient(135deg,rgba(0,87,98,.95),rgba(0,69,150,.94));box-shadow:0 14px 30px rgba(0,84,180,.28),inset 0 1px 0 rgba(255,255,255,.36)}
.study-menu{position:relative}.study-menu summary{color:var(--muted);font-weight:700;cursor:pointer;list-style:none}.study-menu summary::-webkit-details-marker{display:none}.study-menu summary::after{content:" \25BE";font-size:.78rem}.study-menu[open] summary,.study-menu summary:hover{color:var(--accent)}.study-menu-panel{position:absolute;top:calc(100% + 16px);left:50%;display:grid;grid-template-columns:repeat(2,minmax(110px,1fr));gap:14px;width:270px;padding:16px;border:1px solid rgba(255,255,255,.82);border-radius:18px;background:var(--nav-bg);box-shadow:var(--shadow);transform:translateX(-50%)}.study-menu-panel div{display:grid;gap:9px}.study-menu-panel b{color:var(--text);font-size:.88rem}.study-menu-panel a{font-size:.9rem}
.live-class-link{display:flex;align-items:center;gap:7px;color:#b91c1c!important}.live-dot{width:9px;height:9px;border-radius:50%;background:#dc2626;box-shadow:0 0 0 rgba(220,38,38,.6);animation:livePulse 1.25s infinite}@keyframes livePulse{70%{box-shadow:0 0 0 8px rgba(220,38,38,0)}100%{box-shadow:0 0 0 0 rgba(220,38,38,0)}}
.nav-legal-links{display:flex;gap:12px;padding-left:14px;border-left:1px solid var(--border);font-size:.84rem}
.site-header .nav-legal-links{display:none}
.menu-btn{display:none;width:42px;height:42px;padding:9px;background:rgba(255,255,255,.72);border:1px solid rgba(21,33,59,.12);border-radius:12px;cursor:pointer}
.menu-btn span{display:block;width:100%;height:3px;margin:4px 0;border-radius:99px;background:#111827}
.btn{display:inline-block;border:0;border-radius:999px;padding:12px 22px;background:linear-gradient(135deg,#006874,#0054b4);color:white;font-weight:800;cursor:pointer;box-shadow:0 10px 26px rgba(73,160,213,.2);transition:.25s}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(73,160,213,.28)}
.btn.secondary{background:rgba(255,255,255,.8);border:1px solid rgba(255,255,255,.82);color:var(--text)}
.google-btn{background:rgba(255,255,255,.8);color:#1f2937;border:1px solid rgba(15,23,42,.18);box-shadow:0 8px 24px rgba(15,23,42,.12)}
.btn.small{padding:9px 14px;font-size:.9rem}
.hero{display:grid;grid-template-columns:1.4fr .8fr;gap:35px;align-items:center;padding:90px 7% 50px}
.hero h1{font-size:clamp(2rem,5vw,4.6rem);line-height:1.05;margin:8px 0}
.hero p{color:var(--muted);font-size:1.1rem}
.tag{color:var(--accent)!important;font-weight:900;text-transform:uppercase;letter-spacing:.08em}
.hero .hero-study-title{font-size:clamp(2.25rem,5vw,4.2rem);font-weight:900;line-height:1.08;margin:14px 0 10px}
.hero .hero-platform-tag{position:relative;display:block;width:fit-content;max-width:100%;margin:0 auto;padding:9px 14px;border:1px solid rgba(0,104,116,.24);border-radius:999px;background:rgba(255,255,255,.64);color:var(--accent)!important;font-size:.8rem;line-height:1.28;letter-spacing:.11em;text-align:center;box-shadow:0 12px 32px rgba(22,119,232,.12);backdrop-filter:blur(16px)}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-top:25px}.home-start-actions{justify-content:center}
.hero-card,.card,.form-card,.login-card,.quiz-box{background:var(--card);border:1px solid rgba(255,255,255,.82);border-radius:26px;padding:26px;box-shadow:var(--shadow);backdrop-filter:blur(10px)}
.hero-intro{grid-template-columns:1fr;padding-bottom:34px}.hero-intro .hero-content{max-width:1040px;margin:auto;text-align:center}.learning-portal{position:relative;overflow:hidden;background:linear-gradient(180deg,rgba(255,255,255,.84) 0%,rgba(239,246,255,.74) 58%,rgba(248,245,255,.68) 100%);border-bottom:1px solid rgba(255,255,255,.76)}.learning-portal::before{content:"";position:absolute;inset:auto -12% -42% -12%;height:58%;background:radial-gradient(circle at 32% 20%,rgba(145,216,255,.38),transparent 36%),radial-gradient(circle at 72% 26%,rgba(204,187,255,.28),transparent 34%);pointer-events:none}.learning-portal>*{position:relative}.learning-search{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;width:min(760px,100%);margin:28px auto 18px;padding:10px;border:1px solid rgba(255,255,255,.82);border-radius:18px;background:rgba(255,255,255,.72);box-shadow:0 18px 50px rgba(77,111,166,.13);backdrop-filter:blur(18px)}.learning-search input{border:0;padding:12px 14px;border-radius:14px;background:rgba(255,255,255,.72)}.topic-pills{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:10px auto 0}.topic-pills a{padding:9px 13px;border:1px solid rgba(255,255,255,.76);border-radius:999px;background:rgba(255,255,255,.66);color:var(--accent);font-size:.9rem;font-weight:800;box-shadow:0 10px 24px rgba(77,111,166,.08);backdrop-filter:blur(14px)}.topic-pills a:hover{background:rgba(230,255,252,.82)}.portal-stats{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:24px}.portal-stats span{display:grid;min-width:132px;padding:14px;border:1px solid rgba(255,255,255,.78);border-radius:18px;background:rgba(255,255,255,.62);color:var(--muted);box-shadow:0 12px 30px rgba(77,111,166,.1);backdrop-filter:blur(14px)}.portal-stats b{color:var(--text);font-size:1.35rem}.home-updates{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;padding-top:28px}.announcement-panel{padding:20px;background:linear-gradient(145deg,rgba(255,255,255,.82),rgba(230,255,252,.7));overflow:hidden}.announcement-heading,.focus-heading{display:flex;align-items:center;gap:13px;margin-bottom:14px}.announcement-heading h2,.focus-heading h2{margin:2px 0 0;font-size:1.35rem}.announcement-heading .tag,.focus-heading .tag{margin:0;font-size:.68rem}.announcement-logo,.focus-logo{display:grid;width:46px;height:46px;flex:0 0 46px;place-items:center;border-radius:16px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 10px 22px rgba(0,84,180,.22)}.announcement-logo svg,.focus-logo svg{width:26px;height:26px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.announcement-list{display:grid;gap:10px}.announcement-item{display:grid;grid-template-columns:auto 1fr;gap:11px;align-items:start;padding:12px;border:1px solid rgba(255,255,255,.82);border-radius:16px;background:rgba(255,255,255,.62)}.announcement-item.has-image{grid-template-columns:72px 1fr}.announcement-item img{width:72px;height:62px;border-radius:11px;object-fit:cover}.announcement-item-icon{display:grid;width:27px;height:27px;place-items:center;border-radius:9px;background:rgba(0,104,116,.12);color:var(--accent);font-size:.86rem;font-weight:900}.announcement-item p{margin:4px 0 0;color:var(--muted);font-size:.88rem;line-height:1.45}.announcement-link{color:var(--accent);font-weight:800;text-decoration:underline;text-underline-offset:2px;overflow-wrap:anywhere}.focus-panel h2{font-size:1.35rem}
.section{padding:55px 7%}
.section h1,.section h2{font-size:clamp(1.8rem,4vw,3rem);margin-top:0}
.narrow{max-width:900px;margin:auto}
.grid{display:grid;gap:22px}
.cards{grid-template-columns:repeat(3,minmax(0,1fr))}
.two{grid-template-columns:repeat(2,1fr)}
.card{transition:.25s}
.card:hover{transform:translateY(-8px);border-color:rgba(8,120,216,.34);box-shadow:0 28px 64px rgba(77,111,166,.2)}
.card p,.muted{color:var(--muted)}
.card a{color:var(--accent);font-weight:800}
.card a.btn{color:#fff}.card a.btn.secondary{color:var(--text)}
.module-title{display:flex;align-items:center;gap:11px;margin-top:0}.module-icon{display:grid;place-items:center;width:38px;height:38px;flex:0 0 38px;border-radius:13px;background:linear-gradient(135deg,rgba(57,198,212,.2),rgba(85,149,245,.2));color:var(--accent2);box-shadow:inset 0 0 0 1px rgba(8,127,140,.14)}.module-icon svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:22px}.section-heading h2,.section-heading .tag{margin:0}.text-link{color:var(--accent);font-weight:900}.learning-hierarchy{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-bottom:32px}.class-module{position:relative;display:grid;gap:18px;overflow:hidden;border-top:0;background:linear-gradient(145deg,rgba(255,255,255,.9),rgba(230,255,252,.72))}.class-module::before{content:"";position:absolute;inset:0 0 auto;height:6px;background:linear-gradient(90deg,#006874,#0054b4,#6d28d9);z-index:1}.class-module-10{background:linear-gradient(145deg,rgba(255,255,255,.92),rgba(248,245,255,.78))}.class-module-10::before{background:linear-gradient(90deg,#0054b4,#6d28d9,#db2777)}.class-module-image{margin:0 -8px 0;overflow:hidden;border:1px solid rgba(255,255,255,.86);border-radius:20px;background:rgba(255,255,255,.74);box-shadow:0 16px 34px rgba(0,84,180,.14)}.class-module-image img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}.class-module h3{margin:5px 0;font-size:1.7rem}.class-module .tag{margin:0;font-size:.72rem}.subject-grid{display:grid;gap:12px}.subject-link{display:grid;gap:4px;padding:15px;border:1px solid var(--border);border-radius:17px;background:rgba(255,255,255,.64);transition:.22s}.subject-link:hover{transform:translateX(4px);background:rgba(255,255,255,.86);box-shadow:0 12px 28px rgba(77,111,166,.14)}.subject-link b{color:var(--accent)}.subject-link span{color:var(--muted);font-size:.88rem;line-height:1.45}.shared-resources-title{margin:0 0 18px;color:var(--text)}.portal-cards .resource-card{position:relative;display:grid;align-content:start;gap:8px}.portal-cards .featured-resource{border-color:rgba(8,127,216,.48);background:linear-gradient(145deg,rgba(255,255,255,.9),rgba(230,255,252,.74));box-shadow:0 24px 62px rgba(8,127,216,.2),inset 0 1px 0 rgba(255,255,255,.7)}.portal-cards .featured-resource::after{content:"Featured";position:absolute;right:16px;top:16px;padding:5px 9px;border-radius:999px;background:rgba(0,84,180,.1);color:var(--accent2);font-size:.68rem;font-weight:900;text-transform:uppercase;letter-spacing:.06em}.portal-cards .featured-resource .resource-badge{background:linear-gradient(135deg,#006874,#0054b4);color:#fff}.resource-badge{width:max-content;padding:5px 9px;border-radius:999px;background:rgba(230,255,252,.75);color:var(--accent);font-size:.72rem;font-weight:900;text-transform:uppercase;letter-spacing:.06em}.help-section{background:rgba(255,255,255,.36);border-block:1px solid rgba(255,255,255,.6);backdrop-filter:blur(10px)}
.highlight{background:rgba(255,255,255,.32);border-block:1px solid rgba(255,255,255,.6);backdrop-filter:blur(10px)}
.page{min-height:75vh}
.center-page{display:grid;place-items:center;padding:40px}
.login-page{position:relative;overflow:hidden;align-items:center;background:linear-gradient(135deg,rgba(230,255,252,.54),rgba(239,246,255,.72) 48%,rgba(248,245,255,.64));border-block:1px solid rgba(255,255,255,.7)}
.login-page::before{content:"";position:absolute;inset:0;background:linear-gradient(115deg,rgba(0,104,116,.14),transparent 34%),linear-gradient(245deg,rgba(109,40,217,.14),transparent 36%),linear-gradient(180deg,rgba(255,255,255,.34),transparent 42%);pointer-events:none}
.student-login-page::after,.admin-login-page::after{content:"";position:absolute;left:7%;right:7%;bottom:0;height:5px;border-radius:999px 999px 0 0;background:linear-gradient(90deg,#006874,#0054b4,#6d28d9,#db2777)}
.login-card{width:min(420px,92vw);display:grid;gap:15px}
.colourful-login-card{position:relative;z-index:1;width:min(460px,92vw);padding:34px;border-color:rgba(255,255,255,.9);background:linear-gradient(145deg,rgba(255,255,255,.96),rgba(230,255,252,.76));box-shadow:0 30px 80px rgba(21,33,59,.18),inset 0 1px 0 rgba(255,255,255,.8)}
.colourful-login-card::before{content:"";position:absolute;inset:0 0 auto;height:7px;border-radius:26px 26px 0 0;background:linear-gradient(90deg,#006874,#0054b4,#6d28d9,#db2777)}
.admin-colourful-login-card{background:linear-gradient(145deg,rgba(255,255,255,.95),rgba(248,245,255,.78))}
.login-eyebrow{width:max-content;margin:0;padding:6px 10px;border-radius:999px;background:rgba(0,84,180,.1);color:var(--accent2)!important;font-size:.74rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em}
.colourful-login-card h1{margin:0;font-size:clamp(2rem,4vw,2.7rem);line-height:1.05}
.colourful-login-card>p:not(.login-eyebrow){margin:0;color:var(--muted);line-height:1.55}
.colourful-login-card input{border-color:rgba(8,127,140,.26);background:rgba(255,255,255,.86);box-shadow:inset 0 1px 0 rgba(255,255,255,.7)}
.colourful-login-card .btn{width:100%;text-align:center}.colourful-login-card .google-btn{background:linear-gradient(135deg,rgba(255,255,255,.92),rgba(230,255,252,.75));border:1px solid rgba(8,127,140,.22)}.colourful-login-card .highlight-google-login{display:flex;align-items:center;justify-content:center;gap:10px;min-height:48px;border:2px solid rgba(0,84,180,.38);background:linear-gradient(135deg,#fff,#e6fffc 46%,#f8f5ff);color:#14304a;box-shadow:0 16px 36px rgba(0,84,180,.22),0 0 0 5px rgba(109,40,217,.08)}.colourful-login-card .highlight-google-login:hover{box-shadow:0 20px 42px rgba(0,84,180,.28),0 0 0 5px rgba(0,104,116,.12)}.google-mark{display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:#fff;color:#0054b4;font-weight:900;box-shadow:0 4px 12px rgba(15,23,42,.14)}
.login-benefits{display:flex;gap:8px;flex-wrap:wrap}.login-benefits span{padding:7px 10px;border:1px solid rgba(8,127,140,.18);border-radius:999px;background:rgba(255,255,255,.66);color:var(--accent);font-size:.78rem;font-weight:900}
.login-switch-link{justify-self:center;margin-top:4px;color:var(--accent);font-weight:900}
.captcha-box{display:grid;gap:10px;margin:0;padding:14px;border:1px solid var(--border);border-radius:16px;background:rgba(255,255,255,.56)}.captcha-box legend{padding:0 6px;color:var(--text);font-weight:900}.captcha-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.captcha-row label{color:var(--text)}.captcha-box p{margin:0;font-size:.86rem}
input,textarea,select{width:100%;padding:13px 15px;border-radius:14px;border:1px solid var(--border);background:var(--input-bg);color:var(--text);outline:none}
input::placeholder,textarea::placeholder{color:var(--muted);opacity:1}
textarea{min-height:130px}
.form-card{display:grid;gap:16px}
.rich-text-field{overflow:hidden;border:1px solid var(--border);border-radius:16px;background:var(--input-bg)}.rich-text-toolbar{display:flex;flex-wrap:wrap;gap:6px;padding:9px;border-bottom:1px solid var(--border);background:rgba(230,255,252,.52)}.rich-text-toolbar button{min-width:34px;padding:7px 9px;border:1px solid rgba(38,104,132,.24);border-radius:9px;background:rgba(255,255,255,.76);color:var(--text);font-weight:800;cursor:pointer}.rich-text-toolbar button:hover{background:#fff;color:var(--accent)}.rich-text-editor{min-height:145px;padding:14px;outline:none;line-height:1.6}.rich-text-editor:focus{box-shadow:inset 0 0 0 2px rgba(124,58,237,.48)}.rich-text-editor.is-empty::before{content:attr(data-placeholder);color:var(--muted);pointer-events:none}.rich-text-content{color:var(--muted);line-height:1.6}.rich-text-content h2,.rich-text-content h3{margin:12px 0 7px;color:var(--text);font-size:1.15rem}.rich-text-content p{margin:7px 0}.rich-text-content ul,.rich-text-content ol{padding-left:22px}.rich-text-content blockquote{margin:10px 0;padding:9px 12px;border-left:4px solid var(--accent);background:rgba(0,104,116,.07)}.rich-text-content a{color:var(--accent);font-weight:800;text-decoration:underline;text-underline-offset:2px;overflow-wrap:anywhere}
.contact-modules{display:grid;gap:28px;margin-top:28px}.contact-details h2,.message-module h2{margin-top:0}.contact-details{display:grid;gap:15px}.contact-details p,.message-module>p{color:var(--muted)}.contact-link{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;padding:14px 16px;border:1px solid rgba(255,255,255,.78);border-radius:16px;background:rgba(255,255,255,.52);color:var(--accent);font-weight:800}.contact-link-label{min-width:58px;color:var(--text)}
label{display:grid;gap:8px;color:var(--muted);font-weight:700}
label:has(input[type="radio"]){display:flex;align-items:center;grid-template-columns:auto 1fr}label input[type="radio"]{width:auto}
.checkbox-label{display:flex;align-items:center;gap:10px}.checkbox-label input{width:auto}
.list-box{display:grid;gap:14px}
.list-item{padding:16px;border:1px solid rgba(255,255,255,.78);border-radius:18px;background:rgba(255,255,255,.52)}
.filter-row{display:flex;gap:12px;margin-bottom:20px}
.admin-list{margin-top:24px}
.admin-filter-card{display:grid;gap:12px;margin-top:18px;padding:18px;border:1px solid var(--border);border-radius:18px;background:var(--card)}
.admin-filter-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.admin-list-item{display:flex;gap:16px;justify-content:space-between;align-items:center}
.admin-list-item p{margin-bottom:0;color:var(--muted)}
.admin-link-indicator{margin-top:8px}
.admin-link-indicator b{color:#047857}
.admin-actions{display:flex;gap:8px;flex-shrink:0}
.btn.danger{background:#b91c1c}
.notice{padding:16px;border:1px solid rgba(0,104,116,.42);border-radius:16px;background:rgba(0,104,116,.08);color:var(--text)}
.backup-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.file-button input{display:none}
.footer{margin-top:auto;color:var(--muted);padding:30px 7%;border-top:1px solid var(--border);background:rgba(255,255,255,.34);backdrop-filter:blur(10px)}
.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:22px}
.footer-grid p{margin-bottom:0}.footer-author{font-size:.92rem}.footer-links{display:grid;gap:9px;margin-top:12px}.footer a{color:var(--accent);font-weight:700}.footer-bottom{text-align:center;margin:28px 0 0;padding-top:18px;border-top:1px solid var(--border)}
.footer-bottom span{display:inline-block;margin-left:6px}.content-trust{display:flex;flex-wrap:wrap;gap:8px 16px;margin-top:30px;padding:16px;border:1px solid var(--border);border-radius:18px;background:rgba(255,255,255,.46);color:var(--muted);font-size:.9rem}.content-trust b{color:var(--text)}.content-trust a{color:var(--accent);font-weight:800}
.social-links{display:flex;gap:10px;margin-top:12px}.social-icon{display:grid;place-items:center;width:38px;height:38px;border:1px solid rgba(8,127,140,.2);border-radius:50%;background:rgba(255,255,255,.62);transition:.2s}.social-icon:hover{transform:translateY(-3px);background:rgba(255,255,255,.9)}.social-icon svg{width:19px;height:19px;fill:currentColor}
.quiz-filter-form{grid-template-columns:repeat(2,minmax(0,1fr)) auto;margin:22px 0}.quiz-progress{margin:26px 0 18px;padding:18px 20px;border:1px solid rgba(255,255,255,.82);border-radius:20px;background:rgba(255,255,255,.52);box-shadow:0 14px 34px rgba(77,111,166,.1)}.quiz-progress-label,.quiz-actions{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.quiz-progress-label{margin-bottom:11px;color:var(--muted);font-size:.88rem;font-weight:900;letter-spacing:.04em;text-transform:uppercase}.progress{position:relative;height:16px;padding:3px;border:1px solid rgba(255,255,255,.9);border-radius:99px;background:rgba(71,105,160,.12);overflow:hidden;box-shadow:inset 0 2px 5px rgba(71,105,160,.13),0 8px 20px rgba(77,111,166,.1)}.progress span{position:relative;display:block;height:100%;width:0;border-radius:inherit;background:linear-gradient(90deg,#00a3a3,#087fd8 55%,#6d28d9);box-shadow:0 0 18px rgba(8,127,216,.42);transition:width .35s ease}.progress span::after{content:"";position:absolute;inset:0;border-radius:inherit;background:linear-gradient(110deg,transparent 10%,rgba(255,255,255,.72) 40%,transparent 68%);opacity:.7}.quiz-actions{justify-content:flex-start;margin-top:18px}.quiz-result{font-weight:800;color:var(--accent)}
.mcq-options{margin:12px 0 0;padding-left:26px;color:var(--muted)}.mcq-options li{margin:7px 0}.quiz-downloads{margin-top:18px}.quiz-download-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.practice-question{display:grid;gap:14px}.practice-question+.practice-question{margin-top:14px}.practice-options{display:grid;gap:9px}.practice-options label{display:flex;align-items:center;gap:10px;padding:11px 13px;border:1px solid rgba(38,104,132,.2);border-radius:13px;background:rgba(255,255,255,.48);cursor:pointer;transition:.2s}.practice-options label:hover{border-color:rgba(8,127,216,.4);background:rgba(255,255,255,.78)}.practice-options input{width:auto;margin:0;accent-color:var(--accent2)}
iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:18px}
.lecture-preview{position:relative;min-height:180px;border-radius:18px;background:linear-gradient(135deg,rgba(8,127,140,.16),rgba(22,119,232,.2))}.lecture-preview iframe{display:block}.lecture-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%)}.lecture-play:hover{transform:translate(-50%,-54%)}
.login-greeting{color:var(--accent);font-size:.9rem;font-weight:800}
.login-loading-overlay{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:20px;background:rgba(236,246,255,.72);opacity:0;pointer-events:none;transition:opacity .2s;backdrop-filter:blur(18px)}.login-loading-overlay.show{opacity:1;pointer-events:auto}.login-loading-card{display:grid;justify-items:center;gap:14px;width:min(360px,90vw);padding:34px;border:1px solid rgba(255,255,255,.86);border-radius:26px;background:rgba(255,255,255,.74);box-shadow:var(--shadow);text-align:center}.login-spinner{width:54px;height:54px;border:5px solid rgba(22,119,232,.15);border-top-color:var(--accent2);border-radius:50%;animation:loginSpin .75s linear infinite}@keyframes loginSpin{to{transform:rotate(360deg)}}
.advertisement-modal{position:fixed;inset:0;z-index:90;display:grid;place-items:center;padding:22px;background:rgba(15,33,59,.5);backdrop-filter:blur(8px)}.advertisement-card{position:relative;width:min(560px,94vw);max-height:90vh;overflow:auto;border:1px solid rgba(255,255,255,.82);border-radius:24px;background:rgba(255,255,255,.94);box-shadow:0 30px 80px rgba(15,33,59,.35);text-align:center}.advertisement-card img{display:block;width:100%;height:auto;max-height:68vh;object-fit:contain;border-radius:24px 24px 0 0}.advertisement-card h2{margin:18px 24px 6px}.advertisement-description{margin:0 24px 22px;color:var(--muted)}.advertisement-close{position:absolute;right:12px;top:12px;z-index:1;display:grid;place-items:center;width:38px;height:38px;border:1px solid rgba(255,255,255,.76);border-radius:50%;background:rgba(21,33,59,.78);color:white;font-size:1.6rem;line-height:1;cursor:pointer}
.cookie-banner{position:fixed;right:18px;bottom:18px;z-index:95;display:grid;gap:14px;width:min(560px,calc(100vw - 36px));padding:18px;border:1px solid rgba(255,255,255,.86);border-radius:20px;background:rgba(255,255,255,.94);box-shadow:0 24px 60px rgba(15,33,59,.2);backdrop-filter:blur(16px)}.cookie-banner p{margin:7px 0 0;color:var(--muted);font-size:.92rem;line-height:1.5}.cookie-banner a{color:var(--accent);font-weight:800}.cookie-actions{display:flex;gap:10px;flex-wrap:wrap}
.back-to-top{position:fixed;right:20px;bottom:20px;z-index:80;display:flex;align-items:center;gap:5px;padding:10px 13px;border:1px solid rgba(255,255,255,.82);border-radius:999px;background:rgba(21,33,59,.84);color:white;font-weight:800;cursor:pointer;box-shadow:0 12px 30px rgba(21,33,59,.2);opacity:0;pointer-events:none;transform:translateY(12px);transition:.2s}.back-to-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}.back-to-top span{font-size:.82rem}
.study-assistant{position:fixed;right:20px;bottom:20px;z-index:88}.study-assistant-launcher{display:flex;align-items:center;gap:7px;padding:10px 14px;border:1px solid rgba(255,255,255,.82);border-radius:999px;background:linear-gradient(135deg,#006874,#0054b4);color:#fff;font-weight:900;cursor:pointer;box-shadow:0 14px 32px rgba(0,84,180,.28)}.study-assistant-launcher span{display:grid;width:22px;height:22px;place-items:center;border:1px solid rgba(255,255,255,.55);border-radius:50%}.study-assistant-panel{position:absolute;right:0;bottom:58px;display:grid;grid-template-rows:auto minmax(140px,1fr) auto auto auto;width:min(390px,calc(100vw - 30px));max-height:min(640px,calc(100vh - 100px));overflow:hidden;border:1px solid rgba(255,255,255,.86);border-radius:22px;background:rgba(255,255,255,.96);box-shadow:0 24px 64px rgba(21,33,59,.28);backdrop-filter:blur(18px)}.study-assistant-panel[hidden]{display:none}.study-assistant-header{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;padding:16px 16px 12px;border-bottom:1px solid var(--border);background:rgba(230,255,252,.62)}.study-assistant-header small{display:block;margin-top:3px;color:var(--muted)}.study-assistant-close{border:0;background:transparent;color:var(--text);font-size:1.6rem;line-height:1;cursor:pointer}.study-assistant-messages{display:grid;align-content:start;gap:10px;overflow-y:auto;padding:14px}.study-assistant-message{max-width:90%;padding:10px 12px;border-radius:15px;background:rgba(0,104,116,.1);color:var(--text);font-size:.9rem;line-height:1.5}.study-assistant-message.student{justify-self:end;background:linear-gradient(135deg,#006874,#0054b4);color:#fff}.study-assistant-message a{display:inline-block;margin-top:6px;color:var(--accent);font-weight:900}.study-assistant-suggestions{display:flex;gap:7px;overflow-x:auto;padding:0 14px 10px}.study-assistant-suggestions button{flex:0 0 auto;padding:7px 9px;border:1px solid var(--border);border-radius:999px;background:rgba(255,255,255,.82);color:var(--accent);font-size:.78rem;font-weight:800;cursor:pointer}.study-assistant-form{display:grid;grid-template-columns:1fr auto;gap:8px;padding:10px 14px;border-top:1px solid var(--border)}.study-assistant-form input{min-width:0;padding:10px 12px}.study-assistant-note{margin:0;padding:0 14px 12px;color:var(--muted);font-size:.72rem}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}body:has(.study-assistant) .back-to-top{bottom:76px}
.admin-notification{position:relative;display:grid;place-items:center;width:38px;height:38px;border:1px solid var(--border);border-radius:50%;background:rgba(255,255,255,.7)}.admin-notification-icon{font-size:1.05rem}.admin-notification-badge{position:absolute;right:-6px;top:-7px;display:grid;min-width:19px;height:19px;place-items:center;padding:0 4px;border:2px solid white;border-radius:999px;background:#dc2626;color:white;font-size:.66rem;font-weight:900}.admin-notification-badge[hidden]{display:none}
.chapter-toc{margin:24px 0}.chapter-toc h2{font-size:1.45rem}.chapter-toc ol{columns:2;gap:34px;padding-left:22px}.chapter-toc li{break-inside:avoid;margin:7px 0}.chapter-toc a{color:var(--accent);font-weight:700}.chapter-notes{display:grid;gap:20px}.chapter-notes .card{scroll-margin-top:88px}.chapter-notes h2{font-size:1.45rem;color:var(--accent)}.chapter-notes h3{margin-top:22px}.chapter-notes li{margin:6px 0;line-height:1.55}.revision-card{border-color:rgba(8,127,140,.35);background:rgba(230,255,252,.62)}.table-scroll{overflow-x:auto}table{width:100%;border-collapse:collapse}th,td{padding:12px;border:1px solid var(--border);text-align:left}th{background:rgba(8,127,140,.1)}
.chapter-library{margin-top:24px}.chapter-library .card{display:flex;flex-direction:column;align-items:flex-start}.chapter-library .card h2{font-size:clamp(1.45rem,2.4vw,2rem);line-height:1.18}.chapter-library .card a{margin-top:auto}.upcoming-module{border-style:dashed;opacity:.78}
.note-card{scroll-margin-top:110px}.note-content{margin:16px 0;padding:16px;border-radius:16px;background:rgba(255,255,255,.58);color:var(--text);line-height:1.65}.note-content h3{margin:18px 0 8px;color:var(--accent);font-size:1.06rem}.note-content h3:first-child{margin-top:0}.note-content p{margin:8px 0}.note-content ul,.note-content ol{display:grid;gap:7px;margin:10px 0 14px;padding-left:24px}.note-content li{padding-left:2px}.note-actions{display:flex;justify-content:flex-end;width:100%;gap:10px;flex-wrap:wrap;margin-top:18px}.shared-note{border-color:rgba(8,127,140,.68);box-shadow:0 24px 64px rgba(8,127,140,.18)}
.notes-library .note-card{display:flex;flex-direction:column;align-items:flex-start}.notes-library .note-card h2{font-size:clamp(1.45rem,2.4vw,2rem);line-height:1.18}.note-module{width:100%;margin-top:auto;padding-bottom:14px}.note-module summary{width:max-content;max-width:100%;margin-top:22px;margin-bottom:12px;color:var(--accent);font-weight:900;cursor:pointer;list-style:none}.note-module summary::-webkit-details-marker{display:none}.note-module[open] summary{margin-bottom:16px}.note-see-less{margin-top:2px}
code{color:var(--accent)}
.button-click-feedback{border-color:rgba(219,39,119,.72)!important;background:linear-gradient(135deg,#6d28d9,#db2777)!important;color:#fff!important;box-shadow:0 12px 28px rgba(109,40,217,.32)!important}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}