/* Class 12 Board Prep by Gen SkyTech Educational Services: shared look (top bar, footer, sign-up wall, simple pages). */
:root{
  --c10-brand:#1e3a8a; --c10-brand2:#2563eb; --c10-accent:#1e3a8a;
  --c10-bg:#f7f8fa; --c10-card:#fff; --c10-ink:#111827; --c10-ink2:#374151; --c10-muted:#6b7280;
  --c10-line:#e5e7eb; --c10-line2:#f1f2f4; --c10-ok:#15803d; --c10-bad:#b91c1c; --c10-warn:#b45309;
  --c10-shadow:0 1px 2px rgba(17,24,39,.05),0 4px 14px rgba(17,24,39,.05);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){--c10-brand:#93c5fd;--c10-brand2:#60a5fa;--c10-bg:#0d1117;--c10-card:#161b22;--c10-ink:#e6edf3;--c10-ink2:#c9d1d9;--c10-muted:#8b949e;--c10-line:#30363d;--c10-line2:#21262d;--c10-ok:#4ade80;--c10-bad:#f87171;--c10-warn:#fbbf24;--c10-shadow:none}
}
:root[data-theme="dark"]{--c10-brand:#93c5fd;--c10-brand2:#60a5fa;--c10-bg:#0d1117;--c10-card:#161b22;--c10-ink:#e6edf3;--c10-ink2:#c9d1d9;--c10-muted:#8b949e;--c10-line:#30363d;--c10-line2:#21262d;--c10-ok:#4ade80;--c10-bad:#f87171;--c10-warn:#fbbf24;--c10-shadow:none}

.c10-page{margin:0;background:var(--c10-bg);color:var(--c10-ink);font:15px/1.6 Inter,-apple-system,"Segoe UI",Roboto,"Noto Sans","Noto Sans Devanagari","Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
.c10-page *,.c10-bar *,.c10-modal *,.c10-foot *{box-sizing:border-box}

/* Top bar */
.c10-bar{position:relative;z-index:40;background:var(--c10-card);border-bottom:1px solid var(--c10-line);font:14px/1.4 Inter,-apple-system,"Segoe UI",Roboto,"Noto Sans",Arial,sans-serif;color:var(--c10-ink)}
.c10-bar-in{max-width:1120px;margin:0 auto;padding:8px 16px;display:flex;align-items:center;gap:14px;min-height:58px}
.c10-brand{display:flex;align-items:center;gap:10px;text-decoration:none!important;color:var(--c10-ink)!important;min-width:0}
.c10-brand .c10-mark{flex:0 0 auto}
.c10-brand b{display:block;font-size:15px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.c10-brand small{display:block;font-size:11.5px;color:var(--c10-muted);font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.c10-nav{display:flex;gap:2px;margin-left:auto}
.c10-nav a{color:var(--c10-ink2);text-decoration:none;padding:7px 11px;border-radius:8px;font-weight:600;font-size:13.5px;white-space:nowrap}
.c10-nav a:hover{background:var(--c10-line2)}
.c10-nav a.on{color:var(--c10-brand);background:color-mix(in srgb,var(--c10-brand) 9%,transparent)}
.c10-user{display:flex;align-items:center;gap:6px}
.c10-btn{font:inherit;font-weight:650;font-size:13.5px;padding:8px 13px;border-radius:9px;border:1px solid var(--c10-line);background:var(--c10-card);color:var(--c10-ink);cursor:pointer;white-space:nowrap;text-decoration:none;display:inline-flex;align-items:center;gap:6px;justify-content:center}
.c10-btn:hover{border-color:color-mix(in srgb,var(--c10-ink) 30%,var(--c10-line))}
.c10-btn-pri{background:var(--c10-brand);border-color:var(--c10-brand);color:#fff}
:root[data-theme="dark"] .c10-btn-pri{color:#0d1117}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .c10-btn-pri{color:#0d1117}}
.c10-btn-pri:hover{filter:brightness(1.05)}
.c10-btn[disabled]{opacity:.6;cursor:default}
.c10-chip{display:inline-flex;align-items:center;gap:7px;text-decoration:none!important;color:var(--c10-ink)!important;font-weight:650;font-size:13.5px;padding:4px 10px 4px 4px;border:1px solid var(--c10-line);border-radius:999px}
.c10-chip i{font-style:normal;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:var(--c10-brand);color:#fff;font-size:12.5px}
.c10-menu{display:none;width:38px;height:38px;border-radius:9px;border:1px solid var(--c10-line);background:var(--c10-card);color:var(--c10-ink2);place-items:center;cursor:pointer}
@media(max-width:900px){
  .c10-menu{display:grid}
  .c10-nav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;background:var(--c10-card);border-bottom:1px solid var(--c10-line);padding:8px 12px 12px;box-shadow:0 10px 24px rgba(0,0,0,.08)}
  .c10-nav.open{display:flex}
  .c10-nav a{padding:11px 12px;font-size:15px}
  .c10-user{margin-left:auto}
}
@media(max-width:560px){
  .c10-bar-in{padding:8px 12px;gap:8px}
  .c10-brand small{max-width:150px}
  .c10-brand b{font-size:14px}
  .c10-user [data-c10-login]{display:none}
  .c10-btn{padding:7px 10px;font-size:13px}
  .c10-chip span{display:none}
  .c10-chip{padding:3px}
}

/* Footer */
.c10-foot{border-top:1px solid var(--c10-line);background:var(--c10-card);color:var(--c10-muted);font:13px/1.55 Inter,-apple-system,"Segoe UI",Roboto,"Noto Sans",Arial,sans-serif;margin-top:40px}
.c10-foot-in{max-width:1120px;margin:0 auto;padding:22px 16px 30px;display:flex;gap:12px;align-items:flex-start}
.c10-foot b{display:block;color:var(--c10-ink);font-size:14px;margin-bottom:2px}
.c10-foot span{display:block;margin-top:2px}

/* Simple pages */
.c10-main{max-width:1120px;margin:0 auto;padding:0 16px}
.c10-hero{padding:34px 0 18px}
.c10-hero .eyebrow{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--c10-brand)}
.c10-hero h1{font-size:34px;line-height:1.18;margin:6px 0 10px;letter-spacing:-.02em;max-width:760px}
.c10-hero p{color:var(--c10-ink2);font-size:16px;max-width:680px;margin:0}
.c10-hero .acts{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.c10-hero .acts .c10-btn{padding:11px 16px;font-size:14.5px}
.c10-h2{font-size:19px;margin:30px 0 4px;letter-spacing:-.01em}
.c10-h3{font-size:13px;margin:20px 0 10px;text-transform:uppercase;letter-spacing:.06em;color:var(--c10-muted)}
.c10-sub{color:var(--c10-muted);margin:0 0 14px;font-size:14px}
.c10-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.c10-card{background:var(--c10-card);border:1px solid var(--c10-line);border-radius:12px;padding:16px;box-shadow:var(--c10-shadow);min-width:0}
a.c10-card{text-decoration:none;color:inherit;display:block}
a.c10-card:hover{border-color:color-mix(in srgb,var(--c, var(--c10-brand)) 50%,var(--c10-line))}
.c10-card h3{margin:0 0 4px;font-size:16px}
.c10-card p{margin:0;color:var(--c10-muted);font-size:13.5px}
.c10-ic{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;background:color-mix(in srgb,var(--c, var(--c10-brand)) 12%,var(--c10-card));color:var(--c, var(--c10-brand));margin-bottom:10px;font-weight:700}
.c10-links{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.c10-links a{font-size:12.5px;font-weight:650;padding:5px 10px;border-radius:7px;border:1px solid var(--c10-line);color:var(--c10-ink2);text-decoration:none}
.c10-links a.pri{background:var(--c, var(--c10-brand));border-color:var(--c, var(--c10-brand));color:#fff}
.c10-stats{display:flex;gap:26px;flex-wrap:wrap;margin-top:22px}
.c10-stats div{font-size:13px;color:var(--c10-muted)}
.c10-stats b{display:block;font-size:24px;color:var(--c10-ink);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.c10-bar-meter{height:6px;border-radius:6px;background:var(--c10-line2);overflow:hidden;margin-top:10px}
.c10-bar-meter i{display:block;height:100%;background:var(--c, var(--c10-brand))}
.c10-tabs{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0 16px}
.c10-tabs a,.c10-tabs button{font:inherit;border:1px solid var(--c10-line);background:var(--c10-card);color:var(--c10-ink2);padding:7px 14px;border-radius:999px;font-size:13.5px;font-weight:650;cursor:pointer;text-decoration:none}
.c10-tabs .on{background:var(--c, var(--c10-brand));border-color:var(--c, var(--c10-brand));color:#fff}
.c10-table{width:100%;border-collapse:collapse;font-size:13.5px;background:var(--c10-card)}
.c10-table th,.c10-table td{padding:9px 10px;border-bottom:1px solid var(--c10-line2);text-align:left;vertical-align:top}
.c10-table th{font-size:12px;color:var(--c10-muted);text-transform:uppercase;letter-spacing:.04em;font-weight:700;background:var(--c10-bg)}
.c10-table td.n,.c10-table th.n{text-align:right;font-variant-numeric:tabular-nums}
.c10-scroll{overflow-x:auto;border:1px solid var(--c10-line);border-radius:12px}
.c10-note{background:color-mix(in srgb,var(--c10-brand) 7%,var(--c10-card));border:1px solid color-mix(in srgb,var(--c10-brand) 22%,var(--c10-line));border-radius:12px;padding:12px 14px;font-size:14px;color:var(--c10-ink2)}
.c10-empty{color:var(--c10-muted);text-align:center;padding:30px 10px}
@media(max-width:560px){
  .c10-main{padding:0 12px}
  .c10-hero{padding:22px 0 10px}
  .c10-hero h1{font-size:26px}
  .c10-hero p{font-size:15px}
  .c10-grid{grid-template-columns:1fr}
  .c10-stats{gap:18px}
}

/* Sign-up wall and login box */
.c10-modal{position:fixed;inset:0;z-index:1000;background:rgba(15,17,26,.55);display:none;align-items:center;justify-content:center;padding:16px;font:15px/1.5 Inter,-apple-system,"Segoe UI",Roboto,"Noto Sans","Noto Sans Devanagari",Arial,sans-serif;color:var(--c10-ink)}
.c10-modal.on{display:flex}
.c10-modal.wall{backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.c10-box{background:var(--c10-card);width:100%;max-width:420px;max-height:calc(100vh - 32px);overflow:auto;border-radius:16px;padding:22px 20px 20px;box-shadow:0 20px 60px rgba(0,0,0,.25);position:relative}
.c10-box .c10-x{position:absolute;right:10px;top:10px;width:34px;height:34px;border-radius:9px;border:0;background:transparent;color:var(--c10-muted);cursor:pointer;font-size:22px;line-height:1}
.c10-box h2{margin:8px 0 4px;font-size:21px;letter-spacing:-.01em}
.c10-box p.lead{margin:0 0 14px;color:var(--c10-ink2);font-size:14px}
.c10-box .brandline{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:700;color:var(--c10-muted);letter-spacing:.02em}
.c10-seg{display:flex;padding:3px;background:var(--c10-line2);border-radius:10px;margin:0 0 14px}
.c10-seg button{flex:1;font:inherit;border:0;background:transparent;padding:8px;border-radius:8px;font-weight:650;font-size:14px;color:var(--c10-muted);cursor:pointer}
.c10-seg button.on{background:var(--c10-card);color:var(--c10-ink);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.c10-f{display:block;margin:0 0 10px}
.c10-f span{display:block;font-size:12.5px;font-weight:650;color:var(--c10-ink2);margin-bottom:4px}
.c10-f span em{font-style:normal;font-weight:500;color:var(--c10-muted)}
.c10-f input{width:100%;font:inherit;font-size:15px;padding:10px 12px;border-radius:10px;border:1px solid var(--c10-line);background:var(--c10-card);color:var(--c10-ink);outline:none}
.c10-f input:focus{border-color:var(--c10-brand2);box-shadow:0 0 0 3px color-mix(in srgb,var(--c10-brand2) 18%,transparent)}
.c10-row{display:flex;gap:10px}.c10-row .c10-f{flex:1;min-width:0}
.c10-err{display:none;background:color-mix(in srgb,var(--c10-bad) 9%,var(--c10-card));color:var(--c10-bad);border:1px solid color-mix(in srgb,var(--c10-bad) 30%,var(--c10-line));border-radius:9px;padding:8px 10px;font-size:13.5px;margin-bottom:10px}
.c10-err.on{display:block}
.c10-go{width:100%;padding:12px;font-size:15px;margin-top:4px}
.c10-small{font-size:12.5px;color:var(--c10-muted);margin-top:12px;text-align:center}
.c10-perks{list-style:none;padding:0;margin:0 0 14px;display:grid;gap:5px;font-size:13.5px;color:var(--c10-ink2)}
.c10-perks li{display:flex;gap:8px;align-items:flex-start}
.c10-perks li:before{content:"";flex:0 0 16px;height:16px;margin-top:2px;border-radius:50%;background:var(--c10-ok) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center/10px no-repeat}
/* Free-time pill for visitors who have not signed up yet */
.c10-timer{position:fixed;left:50%;transform:translateX(-50%);bottom:14px;z-index:900;background:var(--c10-ink);color:var(--c10-card);font:600 13px/1.3 Inter,-apple-system,"Segoe UI",Roboto,sans-serif;padding:8px 8px 8px 14px;border-radius:999px;display:flex;align-items:center;gap:10px;box-shadow:0 8px 24px rgba(0,0,0,.2);max-width:calc(100vw - 24px)}
.c10-timer button{font:inherit;font-weight:700;border:0;border-radius:999px;padding:6px 12px;background:var(--c10-card);color:var(--c10-ink);cursor:pointer;white-space:nowrap}
.c10-timer[hidden]{display:none}
body.c10-walled{overflow:hidden}
.c10-toast{position:fixed;left:50%;bottom:70px;transform:translateX(-50%);z-index:1100;background:var(--c10-ink);color:var(--c10-card);padding:10px 16px;border-radius:10px;font:600 14px/1.4 Inter,-apple-system,"Segoe UI",sans-serif;box-shadow:0 8px 24px rgba(0,0,0,.2);max-width:calc(100vw - 24px)}