:root{--primary:#1769aa;--accent:#ffb703;--bg:#f4f8fb;--text:#17324d;--card:#fff;--good:#177245;--bad:#b42318}*{box-sizing:border-box}body{margin:0;font-family:Arial,"Noto Sans Tamil",sans-serif;background:var(--bg);color:var(--text);line-height:1.55}.wrap{width:min(1080px,92%);margin:auto}.site-header{background:var(--primary);color:#fff;padding:14px 0;position:sticky;top:0;z-index:10}.header-inner{display:flex;justify-content:space-between;align-items:center}.brand{color:#fff;text-decoration:none;font-weight:700}.site-header a{color:#fff}.site-footer{padding:24px 0;text-align:center;color:#607589;font-size:14px}.hero{margin:24px 0;padding:32px;border-radius:22px;background:linear-gradient(135deg,#e0f2ff,#fff6d6)}.hero h1{font-size:clamp(28px,5vw,46px);margin:10px 0}.hero p{font-size:18px;max-width:700px}.badge{display:inline-block;background:var(--accent);padding:5px 10px;border-radius:999px;font-size:12px;font-weight:700}.tabs{display:flex;gap:10px;margin:20px 0;flex-wrap:wrap}.tab{padding:11px 16px;background:#fff;border-radius:12px;text-decoration:none;color:var(--text);border:2px solid transparent}.tab.active{border-color:var(--primary);font-weight:700}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}.card{display:block;background:var(--card);padding:20px;border-radius:18px;text-decoration:none;color:inherit;box-shadow:0 5px 18px rgba(23,50,77,.07);transition:.15s}.card:hover{transform:translateY(-2px)}.icon{font-size:34px}.card h3{margin:10px 0}.card p{color:#607589}.lesson-no{font-size:13px;color:var(--primary);font-weight:700}.actions{display:flex;gap:8px;flex-wrap:wrap;font-size:13px}.back{display:inline-block;margin:18px 0;text-decoration:none}.quiz-head{display:flex;justify-content:space-between;align-items:start;gap:20px;margin:24px 0}.quiz-card{background:#fff;border-radius:20px;padding:20px;box-shadow:0 5px 18px rgba(23,50,77,.07)}.qblock{display:none}.qblock.show{display:block}.question{font-size:21px;font-weight:700;margin-bottom:18px}.options{display:grid;gap:12px}.option{display:flex;gap:12px;align-items:flex-start;padding:15px;border:2px solid #dce7ef;border-radius:14px;cursor:pointer}.option:hover{border-color:#8db8d6}.option input{margin-top:4px}.quiz-nav{display:flex;justify-content:space-between;gap:10px;margin-top:22px}.btn,button{border:0;border-radius:12px;padding:12px 18px;background:var(--primary);color:#fff;cursor:pointer;text-decoration:none;display:inline-block}button.secondary{background:#dfeaf2;color:var(--text)}#finishBtn{display:none}.notice{background:#fff;padding:18px;border-radius:16px;margin:20px 0}.error{color:var(--bad)}.result{text-align:center;margin:25px 0}.score-circle{width:150px;height:150px;margin:auto;border-radius:50%;display:grid;place-items:center;background:#fff;border:10px solid var(--primary);font-size:32px;font-weight:700}.review{display:grid;gap:12px;margin:25px 0}.review-item{background:#fff;padding:16px;border-radius:14px;border-left:6px solid #999}.review-item.correct{border-left-color:var(--good)}.review-item.wrong{border-left-color:var(--bad)}input{width:100%;padding:13px;border:1px solid #cbd9e3;border-radius:10px;margin-bottom:12px}.narrow{max-width:500px;padding-top:50px}.login{background:#fff;padding:24px;border-radius:18px}.admin-top{display:flex;justify-content:space-between;align-items:center;margin:30px 0}@media(max-width:600px){.hero{padding:24px}.quiz-nav{flex-wrap:wrap}.quiz-nav button{flex:1}.question{font-size:18px}}
/* Admin */
.admin-wrap{max-width:1200px}.admin-top{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;flex-wrap:wrap;margin-bottom:24px}.admin-nav{display:flex;gap:8px;flex-wrap:wrap}.admin-nav a,.row-actions a,.row-actions button{border:1px solid #d8dee9;border-radius:10px;padding:8px 10px;text-decoration:none;background:#fff;color:#1d3557;font-size:.9rem}.row-actions{display:flex;gap:6px;flex-wrap:wrap}.row-actions form{display:inline}.row-actions button{cursor:pointer}.stat-grid{grid-template-columns:repeat(5,1fr)}.stat strong{display:block;font-size:2rem;margin-top:8px}.action-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.action{display:block;padding:16px;border-radius:14px;background:#f4f7fb;text-decoration:none;color:#19324d;font-weight:700;border:1px solid #dfe6ef}.section-head{display:flex;justify-content:space-between;align-items:center;gap:15px;flex-wrap:wrap}.table-wrap{overflow:auto}.table-wrap table{width:100%;border-collapse:collapse;min-width:760px}.table-wrap th,.table-wrap td{padding:10px 12px;border-bottom:1px solid #e7ecf2;text-align:left;vertical-align:top}.table-wrap th{background:#f8fafc}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.form-grid .full{grid-column:1/-1}.form-actions{display:flex;gap:10px;margin-top:18px}.btn{display:inline-block;border:1px solid #d8dee9;background:#fff;border-radius:10px;padding:10px 14px;text-decoration:none;color:#19324d;cursor:pointer}.btn.primary{background:#19324d;color:#fff;border-color:#19324d}.notice.success{border-color:#a7e1b0;background:#effbf1}.notice.error{border-color:#f0b4b4;background:#fff2f2}.narrow{max-width:520px;margin-inline:auto}.login-wrap{min-height:80vh;display:grid;place-items:center}.eyebrow{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;font-weight:700;opacity:.65}label{display:flex;flex-direction:column;gap:6px;font-weight:600}input,select,textarea{font:inherit;padding:11px 12px;border:1px solid #ccd5df;border-radius:10px;background:#fff}textarea{min-height:100px;resize:vertical}@media(max-width:900px){.stat-grid{grid-template-columns:repeat(2,1fr)}.action-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:650px){.form-grid,.stat-grid,.action-grid{grid-template-columns:1fr}.form-grid .full{grid-column:auto}.admin-nav{width:100%}}

/* Student homepage refresh */
:root{--primary:#1769aa;--primary-dark:#0d4f82;--accent:#ffb703;--bg:#f5f8fc;--text:#17324d;--muted:#607589;--line:#dde7f0;--card:#fff;--good:#177245;--bad:#b42318}
body{background:radial-gradient(circle at top right,rgba(255,183,3,.09),transparent 28%),radial-gradient(circle at top left,rgba(23,105,170,.08),transparent 32%),var(--bg)}
.site-header{background:rgba(13,79,130,.96);backdrop-filter:blur(8px);box-shadow:0 3px 18px rgba(13,79,130,.12)}
.brand{font-size:1.04rem;letter-spacing:.1px}.site-header nav{font-size:.92rem}.hero-home{position:relative;overflow:hidden;display:grid;grid-template-columns:1.2fr .8fr;gap:24px;min-height:390px;align-items:center;background:linear-gradient(135deg,#eaf6ff 0%,#fff 54%,#fff7dc 100%);border:1px solid #e1ebf3;box-shadow:0 14px 35px rgba(23,50,77,.08)}
.hero-copy{position:relative;z-index:2}.hero h1{max-width:720px;line-height:1.1;letter-spacing:-.8px}.hero p{color:#466277}.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.big-btn{font-size:1rem;padding:13px 20px}.soft-btn{background:#fff!important;color:var(--text)!important;border:1px solid #dbe5ee!important}
.hero-visual{position:relative;min-height:270px}.study-card{position:absolute;right:5%;top:4%;width:190px;padding:18px;border-radius:20px;background:#fff;box-shadow:0 16px 30px rgba(23,50,77,.12);border:1px solid #edf2f6;transform:rotate(4deg)}.study-card.second{right:29%;top:32%;transform:rotate(-5deg)}.study-card.third{right:0;top:63%;transform:rotate(3deg)}.study-icon{font-size:30px;margin-bottom:7px}.study-card strong,.study-card span{display:block}.study-card span{font-size:12px;color:var(--muted)}
.medium-switch{display:flex;justify-content:center;gap:10px;margin:6px 0 22px}.medium-pill{background:#fff;color:var(--text);text-decoration:none;border:1px solid var(--line);padding:11px 17px;border-radius:999px;font-weight:700;box-shadow:0 4px 14px rgba(23,50,77,.04)}.medium-pill.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.stats-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#dae5ee;border:1px solid #dce7ef;border-radius:18px;overflow:hidden;margin:0 0 34px;box-shadow:0 7px 22px rgba(23,50,77,.05)}.stats-strip>div{background:#fff;padding:18px;text-align:center}.stats-strip strong{display:block;font-size:1.55rem;color:var(--primary-dark)}.stats-strip span{display:block;color:var(--muted);font-size:.9rem;margin-top:2px}
.section-heading{display:flex;justify-content:space-between;align-items:end;gap:16px;margin:0 0 14px}.section-heading h2{margin:5px 0 0;font-size:1.75rem}.eyebrow{font-size:.72rem;letter-spacing:.11em;font-weight:800;color:#6b8194}.mini-note{padding:8px 11px;border-radius:10px;background:#edf5fb;color:var(--primary-dark);font-size:.82rem;font-weight:700}.subject-grid{margin-bottom:40px}.subject-card{padding:20px;min-height:190px;border:1px solid #e6edf3;box-shadow:0 7px 22px rgba(23,50,77,.06)}.subject-top{display:flex;justify-content:space-between;align-items:start}.subject-icon{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;font-size:27px;background:#eef7fd}.arrow{font-size:25px;color:#9ab0c2}.subject-card h3{font-size:1.25rem;margin:17px 0 6px}.subject-card p{margin:0;color:var(--muted);font-size:.9rem}.subject-footer{display:flex;justify-content:space-between;margin-top:18px;padding-top:14px;border-top:1px solid #edf1f5;font-weight:700;color:var(--primary)}.disabled-card{opacity:.64;cursor:default}.disabled-card .subject-footer{color:#8495a4}
.how{margin:22px 0 38px}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.step{display:flex;gap:14px;background:#fff;border:1px solid #e7edf2;border-radius:17px;padding:18px}.step>span{font-size:12px;font-weight:800;color:var(--primary);background:#edf5fb;border-radius:10px;padding:7px 8px;height:max-content}.step strong{display:block}.step p{margin:5px 0 0;color:var(--muted);font-size:.89rem}.callout{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:0 0 22px;padding:24px 26px;border-radius:20px;background:linear-gradient(135deg,#103f65,#1769aa);color:#fff;box-shadow:0 14px 30px rgba(13,79,130,.18)}.callout .eyebrow{color:#d4e8f7}.callout h2{margin:6px 0}.callout p{margin:0;color:#d9ebf7;max-width:700px}.callout-badge{width:64px;height:64px;display:grid;place-items:center;border-radius:18px;background:rgba(255,255,255,.12);font-size:30px;flex:0 0 auto}
@media(max-width:850px){.hero-home{grid-template-columns:1fr}.hero-visual{min-height:180px;max-width:500px;width:100%;margin:auto}.study-card{width:150px}.study-card.second{right:31%}.study-card.third{right:4%}.steps{grid-template-columns:1fr}.section-heading{align-items:flex-start;flex-direction:column}.mini-note{align-self:flex-start}}
@media(max-width:600px){.hero-home{padding:21px}.hero h1{font-size:30px}.hero-visual{min-height:145px}.study-card{width:128px;padding:13px;border-radius:15px}.study-card strong{font-size:12px}.study-card span{font-size:10px}.study-icon{font-size:24px}.medium-switch{gap:7px}.medium-pill{flex:1;text-align:center;padding:10px 8px;font-size:.9rem}.stats-strip strong{font-size:1.25rem}.stats-strip span{font-size:.76rem}.subject-card{min-height:165px}.callout{padding:21px}.callout-badge{display:none}}