/* ===================== LMS components ===================== */
.tiny{font-size:13px;color:var(--mut);margin-top:10px;text-align:center}
.btn-danger{background:transparent;color:var(--red);border-color:color-mix(in srgb,var(--red) 45%,transparent)}
.btn-danger:hover{background:color-mix(in srgb,var(--red) 8%,transparent)}
.pill.live{background:#e7f8f0;color:#0d7a55}
:root[data-theme="dark"] .pill.live{background:#11291f;color:#3ddc97}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);opacity:0;z-index:200;padding:12px 20px;border-radius:12px;background:var(--navy);color:#fff;font-size:14.5px;font-weight:500;box-shadow:var(--shadow-lg);pointer-events:none;transition:.3s;max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* account menu */
.avatar{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(140deg,#5b63f5,#0ea5c6);color:#fff;font-family:'Inter';font-weight:700;font-size:14px;border:0;cursor:pointer;flex:none}
.avatar.xl{width:68px;height:68px;font-size:24px}
.acct{position:relative}
.menu{position:absolute;right:0;top:calc(100% + 10px);width:250px;background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-lg);padding:8px;display:none;z-index:60}
.menu.open{display:block}
.menu .who{padding:10px 12px 12px;border-bottom:1px solid var(--line);margin-bottom:6px}
.menu .who b{display:block;color:var(--ink)}.menu .who small{color:var(--mut);font-size:12.5px;word-break:break-all}
.menu a,.menu button{display:flex;align-items:center;gap:10px;width:100%;padding:10px 12px;border-radius:10px;font-size:14.5px;background:none;border:0;cursor:pointer;text-align:left;color:var(--txt)}
.menu a:hover,.menu button:hover{background:var(--soft)}
.menu .i{width:18px;height:18px;color:var(--mut)}

/* progress */
.cprog{display:flex;align-items:center;gap:10px;margin-top:12px;font-size:12.5px;color:var(--mut)}
.cprog>div{flex:1;height:7px;border-radius:7px;background:var(--soft2);overflow:hidden}
.cprog i{display:block;height:100%;border-radius:7px;background:linear-gradient(90deg,var(--brand),var(--brand2));transition:width .5s}
.cprog span{white-space:nowrap;font-weight:600}
.cprog.big{margin:14px 0 0}

/* flagship cards (home) */
.flags{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.flag{display:grid;grid-template-columns:200px 1fr;border-radius:var(--r-lg);border:1px solid var(--line);background:var(--card);overflow:hidden;transition:.25s}
.flag:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.flag-art{display:grid;place-items:center;color:#fff;position:relative}
.flag-art>.i{width:72px;height:72px;stroke-width:1.3}
.flag-art .pill{position:absolute;top:14px;left:14px}
.flag-body{padding:26px 26px 24px;display:flex;flex-direction:column;gap:8px}
.flag-body h3{font-family:var(--sans);font-weight:700;font-size:1.3rem}
.flag-body p{font-size:14.5px;color:var(--mut);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.flag-body .meta{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--mut);margin:4px 0 8px}
.flag-body .meta span{display:inline-flex;align-items:center;gap:5px}.flag-body .meta .i{width:15px;height:15px}
.flag-body .btn{align-self:flex-start;margin-top:auto}
.fac-l{font-size:12.5px;color:var(--brand);font-weight:600}

/* course page bits */
.soon-box{display:flex;gap:12px;align-items:flex-start;padding:14px;border-radius:12px;background:var(--gold-soft);margin-bottom:14px;font-size:14px}
.soon-box .i{color:var(--gold);margin-top:2px}.soon-box b{display:block;color:var(--ink)}.soon-box span{color:var(--mut)}
.chap ol li a{color:var(--txt)}.chap ol li a:hover{color:var(--brand)}
.chap ol li .ok{color:var(--green)}
.chap ol li .tt{font-size:11.5px;padding:2px 8px;border-radius:999px;background:var(--soft2);color:var(--mut);margin-left:6px;white-space:nowrap}

/* ===== learn player ===== */
.learn-page{background:var(--bg)}
.learn-app{display:grid;grid-template-columns:330px 1fr;grid-template-rows:64px 1fr;min-height:100vh}
.l-top{grid-column:1/-1;position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:14px;padding:0 18px;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.l-top .logo-mark{width:36px;height:36px}.l-top .logo b{font-size:14px}
.l-top-r{margin-left:auto;display:flex;gap:8px;align-items:center}
#sideToggle{display:none}
.l-side{position:sticky;top:64px;height:calc(100vh - 64px);overflow-y:auto;border-right:1px solid var(--line);background:var(--soft)}
.ls-head{padding:20px 20px 16px;border-bottom:1px solid var(--line)}
.ls-head .back{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--mut);margin-bottom:10px}
.ls-head .back:hover{color:var(--brand)}.ls-head .back .i{width:15px;height:15px}
.ls-head h2{font-family:var(--sans);font-size:1.05rem;font-weight:700;line-height:1.4}
.lmod{border-bottom:1px solid var(--line)}
.lmod-h{display:flex;align-items:center;gap:8px;width:100%;padding:14px 20px;background:none;border:0;cursor:pointer;text-align:left;font-weight:600;font-size:14.5px;color:var(--ink)}
.lmod-h small{margin-left:auto;font-size:12px;color:var(--faint);font-weight:500}
.lmod-h .chev{width:16px;height:16px;color:var(--faint);transition:.2s}
.lmod.open .chev{transform:rotate(180deg)}
.lmod-b{display:none;padding:0 10px 12px}
.lmod.open .lmod-b{display:block}
.lmod-b a{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:10px;font-size:14px;color:var(--txt)}
.lmod-b a:hover{background:var(--card)}
.lmod-b a .i{width:17px;height:17px;color:var(--faint)}
.lmod-b a.done .i{color:var(--green)}
.lmod-b a.cur{background:var(--brand-soft);color:var(--brand-ink);font-weight:600}
.lmod-b a.cur .i{color:var(--brand)}
.lmod-b a span{flex:1;line-height:1.4}
.lmod-b a em{font-style:normal;font-size:11.5px;color:var(--faint)}
.l-main{min-width:0}
.lesson{max-width:820px;margin:0 auto;padding:40px 32px 80px}
.l-crumb{font-size:13px;color:var(--brand);font-weight:600}
.lesson h1{font-family:var(--serif);font-size:clamp(1.8rem,3.4vw,2.5rem);margin:8px 0 12px}
.l-meta{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;font-size:13.5px;color:var(--mut);margin-bottom:26px}
.l-meta>span{display:inline-flex;align-items:center;gap:6px}.l-meta .i{width:16px;height:16px}
.tchip{padding:4px 10px;border-radius:999px;background:var(--brand-soft);color:var(--brand-ink);font-weight:600}
.tchip.t-practice{background:var(--gold-soft);color:var(--gold)}
.tchip.t-quiz,.tchip.t-exam{background:var(--green-soft);color:var(--green)}
.okchip{color:var(--green);font-weight:600}
.vid-soon{display:flex;gap:14px;align-items:center;padding:14px 18px;border-radius:14px;border:1px dashed var(--line2);margin-bottom:28px;font-size:14px;background:var(--soft)}
.vid-soon>.i{width:28px;height:28px;color:var(--brand)}
.vid-soon b{display:block;color:var(--ink)}.vid-soon span{color:var(--mut)}
.l-nav{display:flex;justify-content:space-between;gap:12px;margin-top:48px;padding-top:24px;border-top:1px solid var(--line)}
.locked{text-align:center;padding:48px 24px;border:1px dashed var(--line2);border-radius:var(--r-lg);background:var(--soft)}
.locked>.i{width:40px;height:40px;color:var(--faint);margin:0 auto 12px}
.locked h3{font-family:var(--sans);font-weight:700;font-size:1.25rem}
.locked ul{list-style:none;margin-top:14px;display:grid;gap:6px}
.locked a{color:var(--brand);font-weight:500}

/* lesson typography + figures */
.lesson-body{font-size:1.06rem;line-height:1.85}
body[data-text="s"] .lesson-body{font-size:.98rem}
body[data-text="l"] .lesson-body{font-size:1.2rem}
.lesson-body>*+*{margin-top:16px}
.lesson-body h3{font-family:var(--sans);font-weight:700;font-size:1.25rem;margin-top:34px;color:var(--ink)}
/* air-ticketing: GDS commands and screen output in lessons */
.lesson-body pre.gds-out{background:#0b1426;color:#d7f7de;border-radius:12px;padding:12px 14px;overflow-x:auto;font:13px/1.5 ui-monospace,Consolas,"Courier New",monospace;white-space:pre}
.lesson-body code{font:600 .92em ui-monospace,Consolas,monospace;background:var(--soft,#f1f4fa);border:1px solid var(--line,#e4e8f1);border-radius:6px;padding:1px 6px}
.lesson-body .lede{font-size:1.15em;color:var(--ink);padding-left:18px;border-left:4px solid var(--brand)}
.lesson-body a{color:var(--brand);font-weight:600;text-decoration:underline;text-underline-offset:3px}
.lesson-body b{color:var(--ink)}
.pts{list-style:none;display:grid;gap:10px}
.pts li{position:relative;padding-left:28px}
.pts li::before{content:"";position:absolute;left:4px;top:.72em;width:9px;height:9px;border-radius:3px;background:var(--brand);transform:rotate(45deg)}
.task{list-style:none;counter-reset:t;display:grid;gap:12px}
.task li{counter-increment:t;position:relative;padding:12px 16px 12px 54px;border-radius:12px;background:var(--soft);border:1px solid var(--line)}
.task li::before{content:counter(t);position:absolute;left:14px;top:11px;width:28px;height:28px;border-radius:8px;display:grid;place-items:center;background:var(--brand);color:#fff;font-family:'Inter';font-weight:700;font-size:13px}
.note{padding:16px 18px;border-radius:14px;background:var(--brand-soft);border:1px solid color-mix(in srgb,var(--brand) 25%,transparent);font-size:.96em}
.note.warn{background:var(--gold-soft);border-color:color-mix(in srgb,var(--gold) 35%,transparent)}
.lesson .note .i{width:16px;height:16px;vertical-align:-3px}
.kbd{display:inline-block;min-width:26px;padding:1px 8px;border-radius:7px;border:1px solid var(--line2);border-bottom-width:3px;background:var(--card);font-family:'Inter',sans-serif;font-size:.82em;font-weight:600;color:var(--ink);text-align:center;line-height:1.7;white-space:nowrap}
.tbl{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;font-size:.94em}
.tbl th{background:var(--soft2);text-align:left;padding:11px 14px;font-weight:700;color:var(--ink)}
.tbl td{padding:11px 14px;border-top:1px solid var(--line);vertical-align:top}
.tbl tr:nth-child(odd) td{background:color-mix(in srgb,var(--soft) 50%,transparent)}
.cards2,.cards3,.parts{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.cards3{grid-template-columns:repeat(3,1fr)}
.cards2>div,.cards3>div,.parts>div{padding:16px 18px;border-radius:14px;border:1px solid var(--line);background:var(--card)}
.cards2 b,.cards3 b,.parts b{display:block;color:var(--ink);margin-bottom:4px}
.cards2 span,.cards3 span,.parts span{font-size:.92em;color:var(--mut);line-height:1.65;display:block}
.parts>div{border-left:4px solid var(--brand)}
.fig{border-radius:16px;border:1px solid var(--line);background:var(--soft);padding:20px;text-align:center}
.fig em{display:block;font-style:normal;font-size:.85em;color:var(--mut);margin-top:12px;width:100%}
.fig.ipo,.fig.flow{display:flex;flex-wrap:wrap;align-items:stretch;justify-content:center;gap:10px}
.fig.ipo>div,.fig.flow>div{flex:1;min-width:120px;padding:14px;border-radius:12px;background:var(--card);border:1px solid var(--line)}
.fig.ipo>div b,.fig.flow>div b{display:block;color:var(--brand);font-size:1.02em}
.fig.ipo>div span,.fig.flow>div span{font-size:.82em;color:var(--mut)}
.fig.ipo i,.fig.flow i{align-self:center;font-style:normal;font-size:1.4em;color:var(--brand)}
.timeline{position:relative;display:grid;gap:14px;padding-left:28px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--brand),var(--brand2))}
.timeline>div{position:relative;display:grid;grid-template-columns:120px 1fr;gap:14px;padding:12px 16px;border-radius:12px;background:var(--card);border:1px solid var(--line)}
.timeline>div::before{content:"";position:absolute;left:-26px;top:18px;width:12px;height:12px;border-radius:50%;background:var(--card);border:3px solid var(--brand)}
.timeline b{color:var(--brand);font-family:'Inter','Hind Siliguri',sans-serif}
.timeline span{font-size:.94em}
/* keyboard figure */
.kb{padding:18px;border-radius:16px;background:var(--soft);border:1px solid var(--line);overflow-x:auto}
.kr{display:flex;gap:5px;margin-bottom:5px;min-width:560px}
.k{flex:1;min-width:0;height:38px;border-radius:7px;background:var(--card);border:1px solid var(--line2);border-bottom-width:3px;display:grid;place-items:center;font-family:'Inter';font-size:11.5px;font-weight:600;color:var(--ink)}
.k.w15{flex:1.5}.k.w2{flex:2}.k.w25{flex:2.5}.k.sp{flex:6}
.k.fn{background:#e9f1ff;color:#0040b8}.k.md{background:#fff4e0;color:#8a5a00}.k.ed{background:#ffe8ec;color:#a3243b}.k.hr{background:#e3f6ee;color:#0d7a55}.k.ar{background:var(--soft2)}
:root[data-theme="dark"] .k.fn{background:#0e1e42;color:#9dbdff}:root[data-theme="dark"] .k.md{background:#2e2410;color:#f3c66b}:root[data-theme="dark"] .k.ed{background:#3a1820;color:#ff9fb0}:root[data-theme="dark"] .k.hr{background:#11291f;color:#6be2ad}
.k.bump{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}
.kb-legend{display:flex;flex-wrap:wrap;gap:14px;font-size:12.5px;color:var(--mut);margin-top:10px}
.lg{display:inline-block;width:14px;height:14px;border-radius:4px;vertical-align:-2px;margin-right:4px}
.lg.fn{background:#c7c9ff}.lg.md{background:#f3c66b}.lg.ed{background:#ff9fb0}.lg.hr{background:#6be2ad}
/* desktop + taskbar figures */
.fig.desk{padding:16px}
.dk-screen{border-radius:12px;overflow:hidden;background:linear-gradient(135deg,#1e3a8a,#0e7490 60%,#7c3aed);aspect-ratio:16/8;display:flex;flex-direction:column;border:6px solid #0b1430}
.dk-icons{flex:1;display:grid;grid-template-columns:repeat(auto-fill,80px);grid-auto-rows:min-content;gap:10px;padding:14px;color:#fff;font-size:11px;text-align:center;line-height:1.3}
.dk-bar,.fig.taskbar{display:flex;align-items:center;gap:10px;padding:8px 12px;background:rgba(11,20,48,.92);color:#fff;font-size:13px}
.fig.taskbar{border-radius:12px;padding:16px 14px 14px;flex-wrap:wrap}
.dk-bar .sr,.fig.taskbar .sr{background:rgba(255,255,255,.12);padding:4px 14px;border-radius:999px}
.dk-bar .tray,.fig.taskbar .tray{margin-left:auto;font-size:12px}
.fig.taskbar span{position:relative;padding:6px 10px}
.fig.taskbar em{position:absolute;top:-12px;right:-8px;width:22px;height:22px;border-radius:50%;background:#f59e0b;color:#0b1430;font-style:normal;font-weight:700;font-size:12px;display:grid;place-items:center;margin:0}
/* ports */
.ports{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.ports>div{display:grid;grid-template-columns:62px 1fr;grid-template-rows:auto auto;column-gap:14px;padding:14px;border-radius:14px;border:1px solid var(--line);background:var(--card)}
.ports b{color:var(--ink)}.ports span{grid-column:2;font-size:.9em;color:var(--mut);line-height:1.6}
.pt{grid-row:1/3;align-self:center;justify-self:center;display:block;background:#0b1430;border:3px solid #94a3b8}
.pt.usb{width:44px;height:16px;border-radius:2px;box-shadow:inset 0 -7px 0 #3b82f6}
.pt.usbc{width:36px;height:13px;border-radius:7px}
.pt.hdmi{width:46px;height:18px;clip-path:polygon(0 0,100% 0,100% 55%,88% 100%,12% 100%,0 55%)}
.pt.vga{width:46px;height:20px;border-color:#2563eb;clip-path:polygon(0 0,100% 0,90% 100%,10% 100%)}
.pt.lan{width:30px;height:28px;border-radius:2px;clip-path:polygon(0 0,100% 0,100% 75%,75% 75%,75% 100%,25% 100%,25% 75%,0 75%)}
.pt.audio{width:22px;height:22px;border-radius:50%;border-color:#22c55e;box-shadow:16px 0 0 -3px #ec4899}
.pt.pwr{width:34px;height:24px;border-radius:4px;clip-path:polygon(15% 0,85% 0,100% 30%,100% 100%,0 100%,0 30%)}
/* browser + email figs */
.fig.browser{padding:0;overflow:hidden;text-align:left}
.bw-tabs{display:flex;gap:4px;padding:8px 10px 0;background:var(--soft2)}
.bw-tabs span{padding:7px 14px;border-radius:9px 9px 0 0;font-size:12.5px;color:var(--mut)}
.bw-tabs .on{background:var(--card);color:var(--ink);font-weight:600}
.bw-bar{display:flex;align-items:center;gap:12px;padding:10px 12px;background:var(--card);border-bottom:1px solid var(--line);font-size:14px;color:var(--mut)}
.bw-bar .url{flex:1;min-width:0;padding:6px 14px;border-radius:999px;background:var(--soft2);color:var(--ink);font-family:'Inter';font-size:12.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fig.browser em{padding:12px;margin:0}
.fig.email{display:flex;flex-wrap:wrap;justify-content:center;align-items:baseline;gap:4px;font-family:'Inter';font-size:1.5em}
.fig.email b{color:var(--brand)}.fig.email i{font-style:normal;color:var(--gold);font-weight:800}
.fig.email em{display:flex;justify-content:center;gap:24px;font-size:.5em}
/* typing widget */
.typing{padding:18px;border-radius:16px;border:1px solid var(--line);background:var(--card)}
.ty-target{font-family:'Inter',monospace;font-size:1.1em;line-height:1.9;margin-bottom:12px;color:var(--faint);white-space:pre-wrap;overflow-wrap:anywhere}
.ty-target .ok{color:var(--green)}.ty-target .bad{color:#fff;background:var(--red);border-radius:3px}.ty-target .cur{border-bottom:3px solid var(--brand);color:var(--ink)}
.ty-in{width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--line2);background:var(--bg);font-family:'Inter',monospace;font-size:1em;resize:vertical}
.ty-in:focus{outline:0;border-color:var(--brand)}
.ty-stats{display:flex;gap:18px;align-items:center;margin-top:10px;font-size:.9em;color:var(--mut);flex-wrap:wrap}
.ty-stats b{color:var(--ink)}.ty-stats .btn{margin-left:auto}
.typing.ty-done{border-color:var(--green);box-shadow:0 0 0 4px color-mix(in srgb,var(--green) 15%,transparent)}

/* quiz */
.quiz{display:grid;gap:18px}
.qq{border:1px solid var(--line);border-radius:16px;padding:18px 20px;background:var(--card);min-width:0}
.qq legend{display:flex;gap:12px;align-items:flex-start;font-weight:600;color:var(--ink);font-size:1.04rem;padding:0;margin-bottom:12px;float:left;width:100%}
.qq legend span{flex:none;width:28px;height:28px;border-radius:8px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand);font-size:13px}
.qo{clear:both;display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:12px;border:1px solid var(--line);margin-top:8px;cursor:pointer;transition:.15s}
.qo:hover{border-color:var(--brand)}
.qo input{accent-color:var(--brand);width:18px;height:18px;flex:none}
.qo:has(input:checked){border-color:var(--brand);background:var(--brand-soft)}
.qo.ans{border-color:var(--green);background:var(--green-soft)}
.qo.bad{border-color:var(--red);background:color-mix(in srgb,var(--red) 8%,transparent)}
.qq.right{border-color:color-mix(in srgb,var(--green) 50%,transparent)}
.qq.wrong{border-color:color-mix(in srgb,var(--red) 40%,transparent)}
.qex{clear:both;margin-top:12px;font-size:14px;color:var(--mut);padding:10px 12px;border-radius:10px;background:var(--soft)}
.qbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.result-card{margin-top:24px;text-align:center;padding:34px 24px;border-radius:var(--r-lg);border:1px solid var(--line)}
.result-card>.i{width:44px;height:44px;margin:0 auto 12px}
.result-card.pass{background:var(--green-soft);border-color:color-mix(in srgb,var(--green) 40%,transparent)}.result-card.pass>.i{color:var(--green)}
.result-card.fail{background:var(--gold-soft);border-color:color-mix(in srgb,var(--gold) 40%,transparent)}.result-card.fail>.i{color:var(--gold)}
.result-card h2{font-family:var(--sans);font-weight:700;font-size:1.4rem}
.result-card p{color:var(--mut);margin:6px 0 18px}
.result-card .row{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

/* auth */
.auth{display:grid;grid-template-columns:1fr 1.1fr;min-height:100vh}
.auth-art{background:linear-gradient(150deg,var(--navy),#1d2a6b 55%,#0e5f86);color:#c9d0ec;padding:40px 48px;display:flex;flex-direction:column;justify-content:space-between;gap:40px;position:relative;overflow:hidden}
.auth-art::after{content:"";position:absolute;right:-140px;bottom:-140px;width:420px;height:420px;border-radius:50%;border:1px solid rgba(255,255,255,.12);box-shadow:0 0 0 60px rgba(255,255,255,.03),0 0 0 120px rgba(255,255,255,.02)}
.auth-art .logo b{color:#fff}.auth-art .logo small{color:#8c95bb}
.auth-art h2{color:#fff;font-size:clamp(1.8rem,3vw,2.6rem);margin-bottom:18px}
.auth-art ul{list-style:none;display:grid;gap:14px;font-size:15.5px}
.auth-art li{display:flex;gap:10px;align-items:flex-start}.auth-art li .i{color:#5eead4;margin-top:3px}
.auth-art small{color:#8c95bb}
.auth-main{display:grid;place-items:center;padding:40px 24px}
.auth-card{width:100%;max-width:420px;display:grid;gap:14px}
.auth-card h1{font-size:2rem}
.demo-note{display:flex;gap:8px;align-items:flex-start;padding:10px 12px;border-radius:10px;background:var(--gold-soft);font-size:13px;color:var(--txt)}
.demo-note .i{width:16px;height:16px;color:var(--gold);margin-top:2px}
.fld{display:grid;gap:6px;font-size:14px;font-weight:600;color:var(--ink)}
.fld>span{display:flex;justify-content:space-between;gap:10px}
.fld em{font-style:normal;font-weight:400;color:var(--faint)}
.fld a{font-weight:500;color:var(--brand)}
.fld input{height:48px;border-radius:12px;border:1px solid var(--line2);background:var(--card);padding:0 14px;font-size:15.5px;font-weight:400;width:100%}
.fld input:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 14%,transparent)}
.fld input:disabled{background:var(--soft);color:var(--mut)}
.pw{position:relative}.pw input{padding-right:48px}
.pw button{position:absolute;right:6px;top:6px;width:36px;height:36px;border:0;background:none;cursor:pointer;color:var(--faint);display:grid;place-items:center}
.pw-meter{display:flex;align-items:center;gap:5px;margin-top:-6px}
.pw-meter i{flex:1;height:5px;border-radius:5px;background:var(--soft2)}
.pw-meter span{font-size:12.5px;color:var(--mut);min-width:70px;text-align:right}
.pw-meter[data-s="1"] i:nth-child(-n+1){background:var(--red)}
.pw-meter[data-s="2"] i:nth-child(-n+2){background:#f59e0b}
.pw-meter[data-s="3"] i:nth-child(-n+3){background:#84cc16}
.pw-meter[data-s="4"] i{background:var(--green)}
.chk{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--mut)}
.chk input{accent-color:var(--brand);width:17px;height:17px;margin-top:3px;flex:none}
.chk a{color:var(--brand)}
.auth-err{padding:10px 12px;border-radius:10px;background:color-mix(in srgb,var(--red) 10%,transparent);color:var(--red);font-size:14px}
.auth-info{padding:10px 12px;border-radius:10px;background:var(--brand-soft);color:var(--brand-ink);font-size:14px}
.switch{text-align:center;font-size:14.5px;color:var(--mut)}.switch a{color:var(--brand);font-weight:600}
.auth-mobile-logo{display:none}

/* dashboard */
.dash-head{background:var(--soft);border-bottom:1px solid var(--line);padding:40px 0}
.dash-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.dh-left{display:flex;align-items:center;gap:18px}
.dh-left h1{font-size:clamp(1.7rem,3vw,2.3rem)}
.dash{padding-top:32px}
.stats4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}
.stats4>div{padding:20px;border-radius:var(--r);border:1px solid var(--line);background:var(--card);display:grid;grid-template-columns:auto 1fr;column-gap:14px;align-items:center}
.stats4 span{grid-row:1/3;width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand)}
.stats4 b{font-family:var(--serif);font-size:1.7rem;color:var(--ink);line-height:1.1}
.stats4 small{color:var(--mut);font-size:13px}
.resume{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:26px 28px;border-radius:var(--r-lg);background:linear-gradient(135deg,var(--brand-soft),color-mix(in srgb,var(--brand2) 10%,var(--card)));border:1px solid color-mix(in srgb,var(--brand) 25%,transparent);margin-bottom:24px;flex-wrap:wrap}
.resume h2{font-size:1.5rem;margin:6px 0 2px}
.dgrid{display:grid;grid-template-columns:1fr 360px;gap:24px;align-items:start}
.dcourse{display:grid;grid-template-columns:96px 1fr auto;gap:18px;align-items:center;padding:16px 0;border-top:1px solid var(--line)}
.box h2+.dcourse{border-top:0}
.dthumb{width:96px;height:72px;border-radius:12px;display:grid;place-items:center;color:#fff}
.dthumb .i{width:32px;height:32px}
.dinfo{min-width:0}
.dinfo h3{font-family:var(--sans);font-weight:700;font-size:1.02rem}.dinfo h3 a:hover{color:var(--brand)}
.dinfo .muted{font-size:13.5px}
.empty-s{text-align:center;padding:30px 10px}.empty-s>.i{width:36px;height:36px;margin:0 auto 10px;color:var(--faint)}
.empty-s p{color:var(--mut);margin-bottom:14px}
.certrow{display:flex;align-items:center;gap:14px;padding:12px;border-radius:12px;border:1px solid var(--line);margin-top:10px;transition:.2s}
.certrow:hover{border-color:var(--gold)}
.certrow .cic{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;background:var(--gold-soft);color:var(--gold);flex:none}
.certrow b{display:block;color:var(--ink);font-size:14.5px}.certrow small{color:var(--mut);font-family:'Inter';font-size:12px}
.certrow>.i:last-child{margin-left:auto;color:var(--faint)}
.mini{display:flex;gap:12px;align-items:center;padding:10px 0;border-top:1px solid var(--line)}
.box h2+.mini{border-top:0}
.mthumb{width:46px;height:46px;border-radius:11px;display:grid;place-items:center;color:#fff;flex:none}.mthumb .i{width:22px;height:22px}
.mini b{display:block;font-size:14.5px;color:var(--ink);line-height:1.35}.mini small{font-size:12.5px;color:var(--mut);display:inline-flex;gap:4px;align-items:center}
.mini small .i{width:13px;height:13px}
.mini:hover b{color:var(--brand)}

/* settings */
.settings{max-width:760px;padding-top:32px}
.settings .box{display:grid;gap:14px}
.settings .box h2{margin-bottom:4px}
.settings .btn{justify-self:start}
.seg{display:inline-flex;border:1px solid var(--line2);border-radius:12px;overflow:hidden;justify-self:start}
.seg label{cursor:pointer;position:relative}.seg input{position:absolute;opacity:0}
.seg span{display:block;padding:10px 20px;font-size:14.5px}
.seg input:checked+span{background:var(--brand);color:#fff}
.seg input:focus-visible+span{outline:2px solid var(--brand);outline-offset:-2px}
.row-btns{display:flex;gap:10px;flex-wrap:wrap}

/* certificate page */
.cert-page{padding:56px 0 20px;background:var(--soft);border-bottom:1px solid var(--line)}
.cert.big{max-width:940px;margin:0 auto;transform:none;padding:20px}
.cert.big .cert-in{padding:56px 60px 28px}
.cert.big .nm{font-size:3rem}
.cert.big .cc{font-size:1.7rem}
.cert.big .qr{width:88px;height:88px}
.cert-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:28px}
.empty h2{font-family:var(--sans);font-weight:700;margin:10px 0 6px}
.empty>.i{width:40px;height:40px;margin:0 auto}

/* help */
.faq-wrap{max-width:860px;padding-top:40px}
.faq-wrap>h2{font-size:1.5rem;margin:36px 0 14px}
.faq-wrap .ans{padding:0 18px 18px;color:var(--mut);font-size:15px}
.faq-wrap .chap summary{justify-content:space-between}
.legal p+p{margin-top:12px}.legal p{font-size:15px;color:var(--txt)}

@media (max-width:1024px){
  .flags{grid-template-columns:1fr}
  .dgrid{grid-template-columns:1fr}
  .stats4{grid-template-columns:repeat(2,1fr)}
  .learn-app{grid-template-columns:1fr}
  #sideToggle{display:grid}
  .l-side{position:fixed;left:0;top:64px;bottom:0;width:min(340px,88vw);z-index:45;transform:translateX(-100%);transition:transform .25s;box-shadow:var(--shadow-lg);height:auto}
  .learn-app.side-open .l-side{transform:none}
  .auth{grid-template-columns:1fr}.auth-art{display:none}
}
@media (max-width:860px){ .hide-sm{display:none !important} }
@media (max-width:600px){
  .flag{grid-template-columns:1fr}.flag-art{height:150px}
  .cards2,.cards3,.parts,.ports{grid-template-columns:1fr}
  .timeline>div{grid-template-columns:1fr;gap:4px}
  .lesson{padding:28px 16px 64px}
  .stats4{gap:10px}.stats4>div{padding:14px;grid-template-columns:1fr}.stats4 span{grid-row:auto;margin-bottom:8px}
  .dcourse{grid-template-columns:64px 1fr}.dthumb{width:64px;height:56px}.dact{grid-column:1/-1}
  .cert.big{padding:10px}.cert.big .cert-in{padding:30px 18px 20px}.cert.big .nm{font-size:1.9rem}.cert.big .cc{font-size:1.2rem}
  .cert-foot{flex-wrap:wrap;justify-content:center;row-gap:20px}
  .c-lvl{position:static;order:-1;margin-bottom:6px}
  .c-strip{gap:12px;font-size:8.5px}
  .l-nav .btn{padding:0 14px;font-size:14px}
  .tbl{display:block;overflow-x:auto}
  .resume{padding:20px}
}
@media print{
  .site-header,.topbar,.site-footer,.no-print,.toast{display:none !important}
  .cert-page{background:none;border:0;padding:0}
  .cert.big{box-shadow:none;max-width:none;padding:0}
  .cert,.cert-in{print-color-adjust:exact;-webkit-print-color-adjust:exact}
  body{background:#fff}
}

/* ===== AI figures with numbered markers ===== */
.anno{margin:26px 0;border:1px solid var(--line);border-radius:18px;background:var(--card);overflow:hidden}
.anno-stage{position:relative;background:#e9ecf2;line-height:0}
.anno-stage img{width:100%;height:auto;display:block}
.pin{position:absolute;transform:translate(-50%,-50%);width:34px;height:34px;border-radius:50%;border:3px solid #fff;background:var(--brand);color:#fff;font-family:'Inter','Hind Siliguri';font-weight:800;font-size:14px;line-height:1;cursor:pointer;box-shadow:0 4px 14px rgba(0,0,0,.35);transition:transform .25s,opacity .25s,background .25s;display:grid;place-items:center;padding:0}
.pin::after{content:"";position:absolute;inset:-9px;border-radius:50%;border:2px solid var(--brand);opacity:0}
.pin:hover{transform:translate(-50%,-50%) scale(1.12)}
.anno.focus .pin{opacity:.35}
.anno.focus .pin.on{opacity:1;background:#f59e0b;transform:translate(-50%,-50%) scale(1.25);z-index:2}
.anno .pin.on::after{border-color:#f59e0b;animation:ping 1.4s ease-out infinite}
@keyframes ping{0%{opacity:.9;transform:scale(.8)}100%{opacity:0;transform:scale(1.9)}}
.anno-ctrl{display:flex;align-items:center;gap:8px;padding:12px 14px;border-bottom:1px solid var(--line);flex-wrap:wrap;line-height:1.4}
.anno-ctrl .btn-sm{height:34px}
.anno-count{font-size:13px;color:var(--mut);font-weight:600;min-width:64px;text-align:center}
.anno-ctrl [data-a="all"]{margin-left:auto}
.anno-legend{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:14px;margin:0 !important;max-height:none}
.anno-legend li{display:flex;gap:12px;align-items:flex-start;padding:10px 12px;border-radius:12px;cursor:pointer;border:1px solid transparent;transition:.2s;line-height:1.5}
.anno-legend li:hover{background:var(--soft)}
.anno-legend li b{flex:none;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--brand);color:#fff;font-size:13px}
.anno-legend li strong{display:block;color:var(--ink);font-size:.95em}
.anno-legend li small{display:block;color:var(--mut);font-size:.84em}
.anno.focus .anno-legend li{opacity:.45}
.anno .anno-legend li.on{opacity:1;background:var(--gold-soft);border-color:color-mix(in srgb,var(--gold) 45%,transparent)}
.anno .anno-legend li.on b{background:#f59e0b}
.anno figcaption{padding:0 16px 14px;font-size:13px;color:var(--mut);line-height:1.5}
.anno figcaption em{font-style:normal;opacity:.8}

/* ===== classroom mode ===== */
.cbar{position:sticky;top:64px;z-index:5;margin:0 -8px 22px;padding:12px 8px;background:color-mix(in srgb,var(--bg) 94%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.cbar-top{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.cbar-lbl{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:700;color:var(--brand)}
.cbar-lbl .i{width:17px;height:17px}
.linkbtn{background:none;border:0;color:var(--mut);font-size:13px;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.linkbtn:hover{color:var(--brand)}
.cdots{display:flex;gap:6px;margin-top:10px}
.cdots button{flex:1;height:6px;border-radius:6px;border:0;background:var(--soft2);cursor:pointer;padding:0}
.cdots .seen{background:color-mix(in srgb,var(--brand) 45%,transparent)}
.cdots .cur{background:var(--brand)}
.cstep{animation:stepIn .35s ease}
@keyframes stepIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.lesson-body[data-mode="class"] .cstep>h3:first-child{margin-top:0}
.cfoot{display:flex;justify-content:space-between;gap:10px;margin-top:30px;flex-wrap:wrap}
.cfoot:empty{display:none}
.cfoot .btn-primary{margin-left:auto;white-space:normal;height:auto;min-height:46px;padding:10px 20px;text-align:left}
.lesson.in-class .l-nav #doneBtn{display:none}
@media (max-width:600px){
  .anno-legend{grid-template-columns:1fr}
  .pin{width:28px;height:28px;font-size:12px;border-width:2px}
  .anno-ctrl [data-a="all"]{margin-left:0}
  .cbar{top:64px}
}

/* course cover */
.thumb.has-cover,.flag-art.has-cover{background-size:cover !important;background-position:center !important}
.thumb.has-cover>.i,.flag-art.has-cover>.i{display:none}

/* lesson + course promo videos */
.l-video{margin-bottom:28px;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:#0b1430;aspect-ratio:16/9}
.l-video video,.c-promo video{display:block;width:100%;height:100%;aspect-ratio:16/9;background:#0b1430}
.c-promo video{border-radius:14px}
.c-promo h2{display:flex;align-items:center;gap:8px}
.l-sources{margin-top:36px;padding:14px 18px;border:1px solid var(--line);border-radius:14px;background:var(--soft);font-size:14px}
.l-sources summary{cursor:pointer;font-weight:600;color:var(--ink);display:flex;align-items:center;gap:8px}
.l-sources ol{margin:12px 0 0 20px;display:grid;gap:6px}
.l-sources a{color:var(--brand);word-break:break-word}

/* signup/profile: two fields in a row + segmented choice */
.fld-row{display:grid;grid-template-columns:1.4fr 1fr;gap:12px}
.fld select{width:100%;height:48px;border-radius:12px;border:1px solid var(--line2);background:var(--card);padding:0 12px;font:inherit;color:var(--ink)}
.seg{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:6px}
.seg label{position:relative;cursor:pointer}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:flex;align-items:center;justify-content:center;height:46px;border-radius:12px;border:1.5px solid var(--line2);font-weight:600;color:var(--ink);transition:all .2s}
.seg input:checked+span{border-color:var(--brand);background:var(--brand-soft);color:var(--brand)}
.seg input:focus-visible+span{outline:2px solid var(--brand);outline-offset:2px}
@media (max-width:420px){.fld-row{grid-template-columns:1fr}}

/* lesson header photo (EDUCATOR) */
.les-img{margin:18px 0 22px;border-radius:16px;overflow:hidden;border:1px solid var(--line);background:var(--soft)}
.les-img img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}
.les-img figcaption{font-size:12px;color:var(--faint);padding:6px 12px}

/* Google sign-in + Turnstile + guest preview banner */
.btn-google{display:flex;align-items:center;justify-content:center;gap:10px;background:#fff;color:#1f1f1f;border:1px solid #dadce0;font-weight:600}
.btn-google:hover{background:#f7f8fa}
.auth-or{display:flex;align-items:center;gap:12px;margin:14px 0;color:var(--mut);font-size:13.5px}
.auth-or::before,.auth-or::after{content:"";flex:1;height:1px;background:var(--line2)}
.ts-box{margin:10px 0;min-height:65px}
.l-guest{display:flex;flex-wrap:wrap;align-items:center;gap:12px;padding:14px 16px;margin:0 0 16px;border-radius:14px;background:var(--brand-soft);border:1px solid color-mix(in srgb,var(--brand) 25%,transparent)}
.l-guest>div{flex:1;min-width:200px;display:grid}
.l-guest span{font-size:14px;color:var(--mut)}
.l-guest svg{color:var(--brand)}