@import url('https://fonts.googleapis.com/css2?family=Barlow:wght@400;500;600;700&family=Barlow+Condensed:wght@500;600;700&family=Noto+Sans+Tamil:wght@400;500;600;700&display=swap');

/* ═══════════════════════════════════════════════════════════════════════
   தமிழ் நண்பன் — PROFESSIONAL LMS STYLESHEET  v3.0 (Industry design system)
   Blueprint / technical-drawing direction: steel-blue accent on a light
   paper ground, Barlow Condensed headings over Barlow + Noto Sans Tamil,
   square corners, hairline frames, "+" registration marks on every card.
   ⚠️ class பெயர்கள் அனைத்தும் பழையபடியே — HTML / JS எதுவும் மாறவில்லை.
   ═══════════════════════════════════════════════════════════════════════ */
:root{
    /* ── Industry tokens ───────────────────────────────────────────── */
    --ink:#1d1f20; --paper:#f2f2f3; --surface:#ffffff; --surface-2:#e9e9ea;
    --steel:#5980a6;
    --a100:#eef6ff; --a200:#d6ebff; --a300:#b5d9fd; --a400:#94bce3;
    --a500:#749dc4; --a600:#597ea3; --a700:#416180; --a800:#2c455d; --a900:#1d2d3d;
    --n100:#f5f5f8; --n200:#e7e7ea; --n300:#d4d4d7; --n400:#b7b7ba;
    --n500:#98989b; --n600:#7a7a7d; --n700:#5d5d60; --n800:#424244; --n900:#2b2b2d;
    --rule:rgba(29,31,32,.16); --rule-soft:rgba(29,31,32,.09);

    /* ── Legacy variable names, remapped (inline styles இதை பயன்படுத்துகின்றன) ── */
    --primary:#5980a6; --primary-light:#eef6ff; --primary-dark:#416180;
    --primary-deep:#2c455d; --primary-ink:#1d2d3d;
    --violet:#597ea3; --secondary:#5980a6; --accent:#416180; --danger:#a33b3b;
    --maroon:#2c455d; --maroon-dark:#1d2d3d; --maroon-light:#eef6ff;
    --teal:#597ea3; --pink:#5980a6; --sky:#749dc4;
    --bg-main:#f2f2f3; --bg-card:#ffffff; --text-main:#1d1f20;
    --text-muted:#5d5d60; --border:rgba(29,31,32,.16); --border-strong:rgba(29,31,32,.30);

    --g-indigo:#1d2d3d; --g-teal:#2c455d; --g-green:#5980a6; --g-sunset:#416180;

    --shadow-xs:none;
    --shadow-sm:0 1px 2px rgba(43,43,45,.10);
    --shadow:0 2px 6px rgba(43,43,45,.10);
    --shadow-lg:0 10px 28px rgba(43,43,45,.16);
    --shadow-brand:0 1px 2px rgba(43,43,45,.14);
    --ring:0 0 0 2px rgba(89,128,166,.9);

    /* Square corners — technical, not soft */
    --r-sm:2px; --r-md:3px; --r-lg:4px; --r-xl:4px;

    /* Type */
    --f-head:'Barlow Condensed','Noto Sans Tamil','Mukta Malar',system-ui,sans-serif;
    --f-body:'Barlow','Noto Sans Tamil',system-ui,sans-serif;

    /* Registration-mark ink */
    --mk:rgba(89,128,166,.85);
    --mk-light:rgba(255,255,255,.6);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--f-body);background:var(--paper);color:var(--ink);line-height:1.58;font-size:15px;overflow-x:hidden;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
/* பின்னணி — நுட்பமான modular grid (blueprint paper) */
body::before{content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;
    background-image:linear-gradient(rgba(29,31,32,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(29,31,32,.035) 1px,transparent 1px);
    background-size:34px 34px}
::selection{background:rgba(89,128,166,.22)}
.container{max-width:660px;margin:0 auto;padding:1rem;width:100%}
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-thumb{background:var(--n400);border-radius:0}
::-webkit-scrollbar-thumb:hover{background:var(--n600)}
button{-webkit-tap-highlight-color:transparent;font-family:inherit}
a{color:var(--a700);text-underline-offset:3px}
a:hover{color:var(--a900)}
:focus-visible{outline:2px solid var(--steel);outline-offset:2px;box-shadow:none}
h1,h2,h3,h4,h5,h6{font-family:var(--f-head);font-weight:600;line-height:1.16;letter-spacing:-.01em}

/* ═════ Blueprint frame: hairline box + four "+" registration marks ═════
   (CSS-only — markup-ல் <i class="corner"> சேர்க்காமல் background வழியாக) */
.course-card,.sub-card,.test-card,.content-box,.auth-card,.lock-box,.notes-box,
.qcard,.task-opt,.join-box,.mylearn-card,.day-part,.subject-card,.empty-state,
.plan-frame,.today-date,.bookref-strip,.cv-pay-strip{
    --m:linear-gradient(var(--mk),var(--mk));
    background-color:var(--surface);
    background-image:var(--m),var(--m),var(--m),var(--m),var(--m),var(--m),var(--m),var(--m);
    background-repeat:no-repeat;
    background-size:9px 1px,9px 1px,9px 1px,9px 1px,1px 9px,1px 9px,1px 9px,1px 9px;
    background-position:
        4px 8px, right 4px top 8px, 4px bottom 8px, right 4px bottom 8px,
        8px 4px, right 8px top 4px, 8px bottom 4px, right 8px bottom 4px;
}
.subj-hero,.prog-hero,.score-box,.hero{
    --m:linear-gradient(var(--mk-light),var(--mk-light));
    background-image:var(--m),var(--m),var(--m),var(--m),var(--m),var(--m),var(--m),var(--m);
    background-repeat:no-repeat;
    background-size:11px 1px,11px 1px,11px 1px,11px 1px,1px 11px,1px 11px,1px 11px,1px 11px;
    background-position:
        5px 10px, right 5px top 10px, 5px bottom 10px, right 5px bottom 10px,
        10px 5px, right 10px top 5px, 10px bottom 5px, right 10px bottom 5px;
}

/* ═════ Keyframes (பழைய பெயர்கள் அனைத்தும் காக்கப்பட்டன) ═════ */
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes popIn{from{opacity:0}to{opacity:1}}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}
@keyframes gShift{0%,100%{background-position:0 50%}50%{background-position:100% 50%}}
@keyframes shineSweep{from{left:-80%}to{left:130%}}
@keyframes wiggle{0%,100%{transform:rotate(0)}25%{transform:rotate(-5deg)}75%{transform:rotate(5deg)}}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}
@keyframes pulseOk{0%{box-shadow:0 0 0 0 rgba(89,128,166,.35)}100%{box-shadow:0 0 0 8px rgba(89,128,166,0)}}
@keyframes stripes{from{background-position:0 0}to{background-position:28px 0}}
@keyframes marquee{0%{transform:translateX(0)}100%{transform:translateX(-100%)}}
@keyframes pop{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@keyframes glowPulse{0%,100%{box-shadow:var(--shadow-sm)}50%{box-shadow:var(--shadow)}}
@keyframes heroSlideIn{0%{opacity:0;transform:translateY(8px)}100%{opacity:1;transform:none}}
@keyframes sheetUp{from{transform:translateY(100%)}to{transform:translateY(0)}}
@keyframes todayGlow{0%{box-shadow:0 0 0 0 rgba(89,128,166,.5)}70%{box-shadow:0 0 0 10px rgba(89,128,166,0)}100%{box-shadow:0 0 0 0 rgba(89,128,166,0)}}
@keyframes topicBlink{0%,100%{box-shadow:none}50%{box-shadow:0 0 0 3px rgba(89,128,166,.35)}}
@keyframes fabFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}
@keyframes fabWave{0%,60%,100%{transform:rotate(0)}70%{transform:rotate(-12deg)}80%{transform:rotate(10deg)}90%{transform:rotate(-6deg)}}

.screen{display:none;animation:fadeIn .25s ease}
.pulse-today{animation:todayGlow 1.8s ease-out infinite}
button.bn-item.pulse-today{border-radius:2px}
.dp-go{font-size:.7rem;color:var(--a700);font-weight:600;margin-top:3px;font-family:var(--f-head);letter-spacing:.04em;text-transform:uppercase}
.topic-blink{animation:topicBlink .95s ease-in-out 4}
.bookref-strip{border:1px solid var(--rule);border-radius:var(--r-sm);padding:.7rem .95rem;font-size:.84rem;margin-bottom:.9rem;color:var(--n800);line-height:1.55;background-color:var(--n100)}

/* ═════ Navbar ═════ */
.navbar{background:var(--surface);position:sticky;top:0;z-index:1000;padding:.55rem 0;border-bottom:1px solid var(--rule)}
.nav-container{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:.4rem;max-width:660px;margin:0 auto;padding:0 1rem}
.nav-side{display:flex;align-items:center;min-width:0}
.nav-side.nav-left{justify-self:start}
.nav-side.nav-right{justify-self:end}
.brand{display:flex;align-items:center;gap:.65rem;justify-self:center;min-width:0}
.brand-txt{display:flex;flex-direction:column;min-width:0;gap:0}
.brand-name{font-family:var(--f-head);font-size:1.6rem;font-weight:600;line-height:1.15;letter-spacing:-.015em;color:var(--a900);background:none;-webkit-text-fill-color:currentColor;white-space:nowrap}
.brand-tag{font-family:var(--f-head);font-size:.62rem;font-weight:600;color:var(--n600);text-transform:uppercase;letter-spacing:.16em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-mark{width:42px;height:42px;border-radius:0;background:var(--a900);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--f-head);font-size:1.5rem;font-weight:600;box-shadow:none;flex-shrink:0}
@media(max-width:520px){
    .brand-name{font-size:1.42rem}
    .brand-tag{font-size:.58rem}
    .brand-mark{width:38px;height:38px;font-size:1.32rem;border-radius:0}
    .nav-side.nav-right{display:none}
}
.user-chip{display:flex;align-items:center;gap:8px;background:var(--a100);border:1px solid var(--rule);padding:5px 10px 5px 5px;border-radius:2px;font-size:.8rem;font-weight:600;color:var(--a800);animation:popIn .25s ease}
.user-chip .avatar{width:26px;height:26px;border-radius:0;background:var(--steel);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.74rem;font-family:var(--f-head)}
.logout-btn{background:none;border:none;color:var(--danger);font-weight:600;cursor:pointer;font-size:.8rem;font-family:var(--f-head);letter-spacing:.04em;text-transform:uppercase}
.login-link{background:var(--steel);color:#fff;border:1px solid var(--steel);padding:9px 18px;border-radius:var(--r-md);font-family:var(--f-head);font-weight:600;font-size:.86rem;letter-spacing:.04em;text-transform:uppercase;cursor:pointer;box-shadow:none;transition:background .16s ease,border-color .16s ease}
.login-link:hover{background:var(--a600);border-color:var(--a600);transform:none}
.login-link:active{background:var(--a700)}

.marquee-box{background:var(--a900);color:rgba(255,255,255,.9);padding:7px 0;font-weight:500;font-size:.8rem;overflow:hidden;white-space:nowrap;letter-spacing:.02em}
.marquee-content{display:inline-block;padding-left:100%;animation:marquee 34s linear infinite}

/* ═════ Hero strip ═════ */
.hero{background-color:var(--a900);color:#fff;border-radius:var(--r-md);padding:.6rem 1.1rem;box-shadow:none;margin-top:.9rem;position:relative;overflow:hidden;text-align:center;min-height:46px;display:flex;align-items:center;justify-content:center}
.hero-slide{width:100%;position:relative;z-index:1}
.hero-slide.anim{animation:heroSlideIn .45s cubic-bezier(.2,.75,.3,1) both}
.hs-price{font-family:var(--f-head);font-weight:600;background:#fff;color:var(--a900);padding:1px 8px;border-radius:2px;font-size:.95em}
.hero h1{font-family:var(--f-head);font-size:1.02rem;font-weight:600;margin-bottom:.05rem;letter-spacing:.01em}
.hero p{font-size:.74rem;opacity:.82;line-height:1.35}

.section-title{margin:1.6rem 0 .85rem;font-family:var(--f-head);font-size:1.18rem;font-weight:600;display:flex;align-items:center;gap:10px;letter-spacing:.01em;color:var(--ink);animation:fadeUp .35s both;text-transform:uppercase}
.section-title::after{content:'';flex:1;height:1px;background:var(--rule)}

/* ═════ Course cards ═════ */
#courseList>*{animation:fadeUp .38s both}
#courseList>*:nth-child(1){animation-delay:.03s}
#courseList>*:nth-child(2){animation-delay:.08s}
#courseList>*:nth-child(3){animation-delay:.13s}
.course-card{border:1px solid var(--rule);border-radius:var(--r-md);padding:1rem 1.1rem;margin-bottom:10px;cursor:pointer;transition:border-color .16s ease,box-shadow .16s ease;display:flex;align-items:center;gap:.9rem;position:relative;box-shadow:none}
.course-card:hover{border-color:var(--steel);box-shadow:var(--shadow-sm)}
.course-card:active{background-color:var(--a100)}
.course-card::before{content:none}
.course-icon{width:46px;height:46px;border-radius:0;background:var(--a100);border:1px solid var(--rule);display:flex;align-items:center;justify-content:center;font-size:1.3rem;flex-shrink:0;margin-left:2px}
.course-card:hover .course-icon{transform:none;background:var(--a200)}
.course-card.g-tet .course-icon{background:var(--n100)}
.course-body{flex:1;min-width:0}
.course-name{font-family:var(--f-head);font-size:1.08rem;font-weight:600;color:var(--ink);line-height:1.22;letter-spacing:0}
.course-sub{font-size:.8rem;color:var(--n600);margin-top:2px}
.course-right{display:flex;flex-direction:column;align-items:flex-end;gap:5px;flex-shrink:0}
.price-tag{background:var(--a900);color:#fff;font-family:var(--f-head);font-weight:600;font-size:.86rem;padding:3px 10px;border-radius:2px;white-space:nowrap;border:1px solid var(--a900)}
.badge-open{background:var(--a100);color:var(--a800);border:1px solid var(--a300);font-family:var(--f-head);font-weight:600;font-size:.76rem;letter-spacing:.04em;text-transform:uppercase;padding:3px 9px;border-radius:2px}
.badge-lock{font-size:1rem;opacity:.6;filter:grayscale(1)}
.chev{color:var(--n400);font-size:1.15rem;transition:color .16s ease,transform .16s ease}
.course-card:hover .chev{transform:translateX(3px);color:var(--steel)}

.subcourses{margin:-4px 0 14px 16px;padding-left:16px;border-left:1px solid var(--rule);display:none}
.subcourses.open{display:block;animation:fadeUp .25s ease}
.sub-card{border:1px solid var(--rule);border-radius:var(--r-md);padding:.9rem 1rem;margin-bottom:10px;cursor:pointer;display:flex;align-items:center;gap:.85rem;transition:border-color .16s ease,box-shadow .16s ease;box-shadow:none}
.sub-card:hover{border-color:var(--steel);box-shadow:var(--shadow-sm)}
.sub-icon{width:40px;height:40px;border-radius:0;background:var(--n100);border:1px solid var(--rule);display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0}

/* ═════ Course view ═════ */
.cv-header{display:flex;align-items:center;gap:12px;margin:0 0 1rem;padding:.7rem 0;position:sticky;top:56px;background:var(--paper);z-index:900;animation:fadeUp .3s both;border-bottom:1px solid var(--rule)}
.back-btn{background:var(--surface);border:1px solid var(--rule);width:44px;height:44px;border-radius:var(--r-md);font-size:1.3rem;color:var(--ink);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:border-color .16s ease,background .16s ease;box-shadow:none;flex-shrink:0}
.back-btn:hover{border-color:var(--steel);background:var(--a100);transform:none}
.cv-title{font-family:var(--f-head);font-size:1.42rem;font-weight:600;letter-spacing:-.005em;line-height:1.15}
.lock-box{border:1px dashed var(--n400);border-radius:var(--r-md);padding:2.4rem 1.5rem;text-align:center;margin-top:1rem;animation:popIn .3s ease}
.lock-box .big{font-size:2.6rem;display:block;margin-bottom:.6rem;filter:grayscale(1);opacity:.7}
.lock-box h3{font-family:var(--f-head);font-weight:600;font-size:1.3rem;margin-bottom:.4rem}
.lock-box p{color:var(--n600);font-size:.94rem;margin-bottom:1.3rem}
.content-box{border:1px solid var(--rule);border-radius:var(--r-md);padding:1.5rem;margin-top:1rem;animation:fadeUp .3s both;box-shadow:none}
.empty-state{border:1px dashed var(--n400);border-radius:var(--r-md);padding:2.4rem 1.5rem;text-align:center;color:var(--n600);animation:fadeIn .3s ease}
.empty-state .emoji{font-size:2.2rem;display:block;margin-bottom:.6rem;filter:grayscale(1);opacity:.65}

/* ═════ Buttons — one solid accent object ═════ */
.pay-btn,.auth-btn,.done-btn,.sheet-btn,.tc-btn{position:relative;overflow:hidden;font-family:var(--f-head);letter-spacing:.05em;text-transform:uppercase}
.pay-btn{background:var(--steel);color:#fff;border:1px solid var(--steel);padding:.95rem 2rem;border-radius:var(--r-md);font-size:1rem;font-weight:600;cursor:pointer;box-shadow:none;width:100%;max-width:340px;transition:background .16s ease,border-color .16s ease}
.pay-btn:hover{background:var(--a600);border-color:var(--a600);transform:none;box-shadow:none}
.pay-btn:active{background:var(--a700)}

/* ═════ Auth ═════ */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:1.25rem}
.auth-card{width:100%;max-width:430px;border-radius:var(--r-lg);padding:2.3rem 1.8rem;box-shadow:var(--shadow-sm);border:1px solid var(--rule);animation:pop .3s cubic-bezier(.2,.8,.3,1)}
.auth-logo{width:58px;height:58px;border-radius:0;background:var(--a900);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--f-head);font-size:1.7rem;font-weight:600;margin:0 auto 1.1rem;box-shadow:none}
.auth-card h2{text-align:center;font-family:var(--f-head);font-size:1.62rem;font-weight:600;margin-bottom:.3rem}
.auth-card .sub{text-align:center;color:var(--n600);font-size:.9rem;margin-bottom:1.5rem;line-height:1.55}
.field-label{font-family:var(--f-head);font-size:.78rem;font-weight:600;color:var(--n700);margin-bottom:.4rem;display:block;letter-spacing:.1em;text-transform:uppercase}
.phone-input{display:flex;align-items:center;border:1px solid var(--rule);border-radius:var(--r-md);overflow:hidden;margin-bottom:1.1rem;transition:border-color .16s ease,box-shadow .16s ease;background:var(--surface)}
.phone-input:focus-within{border-color:var(--steel);box-shadow:0 0 0 2px rgba(89,128,166,.25)}
.phone-input .cc{padding:.9rem .8rem;background:var(--n100);font-family:var(--f-head);font-weight:600;color:var(--a800);border-right:1px solid var(--rule)}
.phone-input input{flex:1;border:none;outline:none;padding:.9rem;font-size:1.05rem;font-weight:500;font-family:var(--f-body);letter-spacing:1px;background:transparent;min-height:48px}
.auth-input{width:100%;border:1px solid var(--rule);border-radius:var(--r-md);padding:.9rem 1rem;font-size:1.05rem;font-weight:500;font-family:var(--f-body);outline:none;margin-bottom:1.1rem;transition:border-color .16s ease,box-shadow .16s ease;background:var(--surface);min-height:48px}
.auth-input:hover{border-color:var(--n500)}
.auth-input:focus{border-color:var(--steel);box-shadow:0 0 0 2px rgba(89,128,166,.25)}
.auth-input.otp{text-align:center;letter-spacing:12px;font-size:1.5rem;font-weight:600;font-family:var(--f-head)}
.auth-btn{width:100%;background:var(--steel);color:#fff;border:1px solid var(--steel);padding:1rem;border-radius:var(--r-md);font-size:1rem;font-weight:600;cursor:pointer;transition:background .16s ease,opacity .16s ease;box-shadow:none;min-height:50px}
.auth-btn:hover{background:var(--a600);border-color:var(--a600);transform:none;box-shadow:none}
.auth-btn:active{background:var(--a700)}
.auth-btn:disabled{opacity:.45;cursor:not-allowed}
.auth-link{display:block;text-align:center;background:none;border:none;color:var(--a700);font-family:var(--f-head);font-weight:600;letter-spacing:.04em;cursor:pointer;margin-top:1rem;font-size:.92rem;transition:color .15s ease;min-height:44px}
.auth-link:hover{color:var(--a900);opacity:1}
.hint{font-size:.8rem;color:var(--n600);text-align:center;margin-top:.8rem;line-height:1.55}
.err{background:#fbf0f0;color:var(--danger);border:1px solid #e3c4c4;border-radius:var(--r-sm);padding:.75rem .9rem;font-size:.88rem;font-weight:500;margin-bottom:1rem;display:none}
.err.show{display:block;animation:shake .35s ease}

#toast{visibility:hidden;min-width:250px;background:var(--a900);color:#fff;text-align:center;border-radius:var(--r-md);padding:12px 18px;position:fixed;z-index:5000;left:50%;bottom:88px;transform:translateX(-50%);font-size:.88rem;font-weight:500;box-shadow:var(--shadow-lg)}
#toast.show{visibility:visible;animation:fadeUp .25s,fadeIn .3s 2.6s reverse both}

/* ═════ Bottom nav ═════ */
body.has-bottom-nav{padding-bottom:78px}
.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:1500;display:none;justify-content:space-around;align-items:center;background:var(--surface);border-top:1px solid var(--rule);padding:6px 4px calc(6px + env(safe-area-inset-bottom));max-width:660px;margin:0 auto}
.bottom-nav.show{display:flex;animation:fadeUp .25s ease}
.bn-item{background:none;border:none;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:3px;padding:7px 2px;border-radius:2px;color:var(--n600);transition:color .16s ease;flex:1;min-width:0;position:relative;min-height:48px;justify-content:center}
.bn-item .bn-icon{font-size:1.2rem;line-height:1;filter:grayscale(1);opacity:.55;transition:filter .16s ease,opacity .16s ease}
.bn-item .bn-label{font-family:var(--f-head);font-size:.68rem;font-weight:600;letter-spacing:.06em;white-space:nowrap;max-width:100%;overflow:hidden;text-overflow:ellipsis;text-transform:uppercase}
.bn-item.active{color:var(--a800)}
.bn-item.active .bn-icon{filter:grayscale(.2);opacity:1;transform:none}
.bn-item.active::after{content:'';position:absolute;top:0;width:22px;height:2px;background:var(--steel)}
.bn-item:active{transform:none;background:var(--a100)}

/* ═════ Floating help ═════ */
.help-fab{position:fixed;right:14px;bottom:84px;z-index:1400;display:none;align-items:center;gap:.45rem;background:var(--a900);color:#fff;text-decoration:none;padding:.42rem .95rem .42rem .42rem;border:1px solid var(--a900);border-radius:var(--r-md);font-family:var(--f-head);font-weight:600;font-size:.84rem;letter-spacing:.06em;text-transform:uppercase;box-shadow:var(--shadow);transition:background .16s ease}
body.has-bottom-nav .help-fab{display:flex}
.help-fab:hover{background:var(--a800);color:#fff;transform:none}
.help-fab .fab-ic{width:32px;height:32px;border-radius:0;background:#fff;display:flex;align-items:center;justify-content:center;font-size:1.15rem}
@media(max-width:400px){.help-fab .fab-txt{display:none}.help-fab{padding:.35rem;right:12px}}

/* ═════ Bottom sheet ═════ */
.sheet-overlay{position:fixed;inset:0;background:rgba(29,45,61,.5);z-index:2000;display:none;align-items:flex-end;justify-content:center;animation:fadeIn .2s ease}
.sheet-overlay.show{display:flex}
.sheet-card{background:var(--surface);width:100%;max-width:660px;border-radius:var(--r-lg) var(--r-lg) 0 0;padding:.6rem 1.25rem calc(1.5rem + env(safe-area-inset-bottom));box-shadow:0 -12px 32px rgba(43,43,45,.2);animation:sheetUp .34s cubic-bezier(.16,1,.3,1);max-height:84vh;overflow-y:auto;border-top:1px solid var(--rule)}
.sheet-handle{width:44px;height:3px;border-radius:0;background:var(--n400);margin:6px auto 1.1rem}
.sheet-title{font-family:var(--f-head);font-size:1.3rem;font-weight:600;margin-bottom:.2rem;display:flex;align-items:center;gap:9px}
.sheet-sub{color:var(--n600);font-size:.88rem;margin-bottom:1.1rem;line-height:1.55}
.sheet-row{display:flex;align-items:center;gap:12px;padding:.9rem 0;border-bottom:1px solid var(--rule-soft);animation:fadeUp .3s both}
.sheet-row:nth-child(3){animation-delay:.04s}
.sheet-row:nth-child(4){animation-delay:.08s}
.sheet-row:nth-child(5){animation-delay:.12s}
.sheet-row:last-of-type{border-bottom:none}
.sheet-row .sr-ic{width:42px;height:42px;border-radius:0;background:var(--a100);border:1px solid var(--rule);display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0}
.sheet-row .sr-main{flex:1;min-width:0}
.sheet-row .sr-t{font-family:var(--f-head);font-weight:600;font-size:1.02rem}
.sheet-row .sr-d{font-size:.84rem;color:var(--n600)}
.sheet-btn{display:block;width:100%;text-align:center;background:var(--steel);color:#fff;border:1px solid var(--steel);padding:.9rem;border-radius:var(--r-md);font-weight:600;font-size:.98rem;cursor:pointer;margin-top:.85rem;text-decoration:none;transition:background .16s ease;box-shadow:none;min-height:48px}
.sheet-btn:hover{background:var(--a600);border-color:var(--a600);color:#fff}
.sheet-btn:active{background:var(--a700);transform:none}
.sheet-btn.danger{background:var(--danger);border-color:var(--danger);box-shadow:none}
.sheet-btn.danger:hover{background:#8c3232;border-color:#8c3232}
.sheet-btn.ghost{background:transparent;color:var(--ink);border-color:var(--rule);box-shadow:none}
.sheet-btn.ghost:hover{background:var(--n100);color:var(--ink)}
.mylearn-card{display:flex;align-items:center;gap:12px;border:1px solid var(--rule);border-radius:var(--r-md);padding:.9rem 1rem;margin-bottom:10px;cursor:pointer;transition:border-color .16s ease,box-shadow .16s ease;box-shadow:none}
.mylearn-card:hover{border-color:var(--steel);box-shadow:var(--shadow-sm)}
.mylearn-card .ml-ic{width:44px;height:44px;border-radius:0;background:var(--a100);border:1px solid var(--rule);display:flex;align-items:center;justify-content:center;font-size:1.35rem;flex-shrink:0}

/* ═════ Subject grid ═════ */
.subject-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:.9rem 0}
.subject-card{display:flex;align-items:center;gap:.6rem;border:1px solid var(--rule);border-radius:var(--r-md);padding:.7rem;cursor:pointer;text-align:left;transition:border-color .16s ease,box-shadow .16s ease;position:relative;animation:fadeUp .35s both;color:var(--ink);overflow:hidden;box-shadow:none;min-height:56px}
.subject-grid .subject-card:nth-child(1){animation-delay:.02s}
.subject-grid .subject-card:nth-child(2){animation-delay:.05s}
.subject-grid .subject-card:nth-child(3){animation-delay:.08s}
.subject-grid .subject-card:nth-child(4){animation-delay:.11s}
.subject-grid .subject-card:nth-child(5){animation-delay:.14s}
.subject-grid .subject-card:nth-child(6){animation-delay:.17s}
.subject-grid .subject-card:nth-child(7){animation-delay:.2s}
.subject-grid .subject-card:nth-child(8){animation-delay:.23s}
.subject-card:hover{transform:none;box-shadow:var(--shadow-sm);border-color:var(--steel)}
.subject-card:active{background-color:var(--a100)}
.subject-card .s-icon{font-size:1rem;display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:0;background:var(--a100);border:1px solid var(--rule);flex-shrink:0}
.subject-card:hover .s-icon{transform:none;background:var(--a200)}
.subject-card .s-name{font-family:var(--f-head);font-size:.94rem;font-weight:600;color:var(--ink);line-height:1.2;min-width:0}
.subject-card .s-lock{position:absolute;top:4px;right:5px;font-family:var(--f-head);font-size:.62rem;background:var(--n100);color:var(--n700);padding:1px 5px;border-radius:2px;font-weight:600;letter-spacing:.06em}
.cv-pay-strip{border:1px solid var(--rule);border-radius:var(--r-md);padding:.7rem .85rem;margin-top:.8rem;display:flex;align-items:center;justify-content:space-between;gap:.6rem;flex-wrap:wrap;animation:fadeUp .4s .2s both;background-color:var(--n100)}
.cv-pay-strip p{margin:0;color:var(--n800);font-size:.78rem;font-weight:500;text-align:left;flex:1;min-width:150px}
.cv-pay-strip .pay-btn{width:auto;max-width:none;padding:.55rem 1rem;font-size:.82rem;border-radius:var(--r-md);box-shadow:none;margin:0;min-height:40px}
.cv-pay-strip .hint{width:100%;margin:.2rem 0 0;text-align:center}
.join-box{margin-top:1.2rem;border:1px solid var(--rule);border-radius:var(--r-md);padding:1.1rem;text-align:center;box-shadow:none;animation:fadeUp .4s .25s both}
.join-title{margin:0 0 .8rem;font-family:var(--f-head);font-weight:600;font-size:1.05rem;color:var(--ink);letter-spacing:.01em}
.join-btns{display:flex;gap:.6rem;flex-wrap:wrap;justify-content:center}
.join-btn{flex:0 1 auto;min-width:0;display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.5rem 1rem;border-radius:var(--r-md);font-family:var(--f-head);font-weight:600;font-size:.84rem;letter-spacing:.05em;text-transform:uppercase;color:#fff;text-decoration:none;transition:background .16s ease;box-shadow:none;min-height:40px}
.join-btn:hover{transform:none;box-shadow:none;color:#fff}
.join-btn.wa{background:var(--a700);border:1px solid var(--a700)}
.join-btn.wa:hover{background:var(--a800)}
.join-btn.tg{background:var(--a600);border:1px solid var(--a600)}
.join-btn.tg:hover{background:var(--a700)}

/* ═════ Subject inner ═════ */
.subj-hero{background-color:var(--a900);color:#fff;border-radius:var(--r-md);padding:1.5rem 1.4rem;position:relative;overflow:hidden;margin-bottom:1.1rem;box-shadow:none;text-align:center;display:flex;flex-direction:column;align-items:center;animation:fadeUp .35s both}
.subj-hero.g-tet{background-color:var(--a800);box-shadow:none}
.subj-hero .s-big{position:absolute;right:2px;bottom:-14px;font-size:4rem;opacity:.1;filter:grayscale(1)}
.subj-hero .crumb{font-family:var(--f-head);font-size:.72rem;font-weight:600;opacity:.72;text-transform:uppercase;letter-spacing:.16em}
.subj-hero h2{font-family:var(--f-head);font-size:1.62rem;font-weight:600;margin:.2rem 0 .5rem;letter-spacing:-.005em;position:relative;z-index:1}
.subj-hero .meta{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;position:relative;z-index:1}
.subj-hero .meta span{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.28);padding:3px 10px;border-radius:2px;font-family:var(--f-head);font-size:.78rem;font-weight:500;letter-spacing:.04em}
.tab-row{display:flex;gap:0;margin-bottom:1.1rem;overflow-x:auto;-webkit-overflow-scrolling:touch;border-bottom:1px solid var(--rule);animation:fadeUp .35s .06s both}
.tab-pill{position:relative;flex-shrink:0;background:transparent;border:none;padding:.75rem 1rem .8rem;font-family:var(--f-head);font-weight:600;font-size:.94rem;letter-spacing:.03em;cursor:pointer;color:var(--n600);white-space:nowrap;transition:color .16s ease;min-height:46px;text-transform:uppercase}
.tab-pill::after{content:'';position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--steel);transform:scaleX(0);transition:transform .2s cubic-bezier(.4,0,.2,1)}
.tab-pill:hover{color:var(--ink)}
.tab-pill.active{color:var(--a800)}
.tab-pill.active::after{transform:scaleX(1)}

/* ═════ Test / task cards ═════ */
#subjTabBody>.test-card,#subjTabBody>div>.test-card{animation:fadeUp .35s both}
#subjTabBody>.test-card:nth-child(2){animation-delay:.03s}
#subjTabBody>.test-card:nth-child(3){animation-delay:.06s}
#subjTabBody>.test-card:nth-child(4){animation-delay:.09s}
#subjTabBody>.test-card:nth-child(5){animation-delay:.12s}
#subjTabBody>.test-card:nth-child(6){animation-delay:.15s}
#subjTabBody>.test-card:nth-child(7){animation-delay:.18s}
#subjTabBody>.test-card:nth-child(8){animation-delay:.21s}
.test-card{border:1px solid var(--rule);border-radius:var(--r-md);padding:1rem 1.1rem;margin-bottom:10px;display:flex;align-items:center;gap:.95rem;transition:border-color .16s ease,box-shadow .16s ease;box-shadow:none}
.test-card:hover{border-color:var(--steel);box-shadow:var(--shadow-sm);transform:none}
.test-card .tc-ic{width:44px;height:44px;border-radius:0;background:var(--a100);border:1px solid var(--rule);display:flex;align-items:center;justify-content:center;font-size:1.25rem;flex-shrink:0}
.test-card:hover .tc-ic{transform:none;background:var(--a200)}
.test-card .tc-main{flex:1;min-width:0}
.test-card .tc-t{font-family:var(--f-head);font-weight:600;font-size:1.04rem;line-height:1.28}
.test-card .tc-d{font-size:.8rem;color:var(--n600);margin-top:2px}
.tc-btn{background:var(--steel);color:#fff;border:1px solid var(--steel);padding:.55rem 1.05rem;border-radius:var(--r-md);font-weight:600;font-size:.84rem;cursor:pointer;white-space:nowrap;box-shadow:none;transition:background .16s ease;min-height:40px}
.tc-btn.note{background:transparent;color:var(--a800);border-color:var(--rule)}
.tc-btn.note:hover{background:var(--a100);border-color:var(--steel)}
.tc-btn:hover{background:var(--a600);border-color:var(--a600);transform:none}
.tc-btn:active{background:var(--a700);transform:none}

/* ═════ Today / Progress ═════ */
.today-date{display:inline-flex;align-items:center;gap:9px;border:1px solid var(--rule);border-radius:var(--r-md);padding:.5rem 1rem;font-family:var(--f-head);font-weight:600;font-size:.94rem;letter-spacing:.02em;margin-bottom:1rem;animation:popIn .25s ease;box-shadow:none}
.today-date .dd{background:var(--a900);color:#fff;border-radius:2px;padding:2px 10px;font-size:.8rem;font-weight:600}
.day-part{border:1px solid var(--rule);border-radius:var(--r-md);padding:1rem 1.1rem;margin-bottom:10px;display:flex;gap:.95rem;align-items:flex-start;animation:fadeUp .35s both;transition:border-color .16s ease;box-shadow:none;position:relative}
.day-part:hover{transform:none;border-color:var(--n500);box-shadow:none}
.day-part:nth-of-type(2){animation-delay:.05s}
.day-part:nth-of-type(3){animation-delay:.1s}
.day-part.p-ta,.day-part.p-gs,.day-part.p-ap,.day-part.p-na{border-left-color:var(--rule)}
.day-part .dp-ic{font-size:1.4rem;flex-shrink:0;filter:grayscale(.4)}
.day-part .dp-k{font-family:var(--f-head);font-size:.72rem;font-weight:600;color:var(--n600);text-transform:uppercase;letter-spacing:.12em}
.day-part .dp-v{font-weight:500;font-size:.96rem;line-height:1.5}
.done-btn{width:100%;background:var(--steel);color:#fff;border:1px solid var(--steel);padding:.95rem;border-radius:var(--r-md);font-size:.98rem;font-weight:600;cursor:pointer;box-shadow:none;margin-top:.8rem;transition:background .16s ease;min-height:48px}
.done-btn:hover{background:var(--a600);border-color:var(--a600);transform:none;box-shadow:none}
.done-btn:active{background:var(--a700)}
.done-btn.done{background:var(--a100);color:var(--a800);box-shadow:none;cursor:default;border:1px solid var(--a300)}
.done-btn.done::after{display:none}
.prog-hero{background-color:var(--a900);color:#fff;border-radius:var(--r-md);padding:1.5rem 1.4rem;margin-bottom:1.1rem;box-shadow:none;animation:fadeUp .35s both;position:relative;overflow:hidden}
.prog-hero h3{font-family:var(--f-head);font-size:1.28rem;font-weight:600;margin-bottom:.85rem;position:relative;z-index:1}
.prog-track{background:rgba(255,255,255,.15);border-radius:0;height:8px;overflow:hidden;position:relative;z-index:1;border:1px solid rgba(255,255,255,.22)}
.prog-fill{height:100%;border-radius:0;background:var(--a400);transition:width .8s cubic-bezier(.22,1,.36,1)}
.prog-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:1.1rem;position:relative;z-index:1}
.prog-stat{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.2);border-radius:2px;padding:.75rem;text-align:center;animation:popIn .3s both}
.prog-stat:nth-child(2){animation-delay:.05s}
.prog-stat:nth-child(3){animation-delay:.1s}
.prog-stat .n{font-family:var(--f-head);font-size:1.6rem;font-weight:600;letter-spacing:-.01em;line-height:1.1}
.prog-stat .l{font-family:var(--f-head);font-size:.7rem;font-weight:500;opacity:.78;letter-spacing:.1em;text-transform:uppercase}
.plan-frame{width:100%;height:72vh;border:1px solid var(--rule);border-radius:var(--r-md);animation:fadeUp .3s both;box-shadow:none}

/* ═════ Task / Notes / Quiz ═════ */
.task-opts{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:1rem}
.task-opt{border:1px solid var(--rule);border-radius:var(--r-md);padding:1.2rem .85rem;text-align:center;cursor:pointer;transition:border-color .16s ease,box-shadow .16s ease;color:var(--ink);position:relative;overflow:hidden;animation:fadeUp .35s both;box-shadow:none}
.task-opt.t{animation-delay:.06s}
.task-opt:hover{transform:none;border-color:var(--steel);box-shadow:var(--shadow-sm)}
.task-opt:active{background-color:var(--a100)}
.task-opt .to-ic{width:46px;height:46px;border-radius:0;background:var(--a100);border:1px solid var(--rule);display:inline-flex;align-items:center;justify-content:center;font-size:1.45rem;margin-bottom:.55rem}
.task-opt:hover .to-ic{transform:none;background:var(--a200)}
.task-opt .to-t{font-family:var(--f-head);font-weight:600;font-size:1.06rem;color:var(--ink)}
.task-opt .to-d{font-size:.78rem;color:var(--n600);margin-top:2px}
.notes-box{border:1px solid var(--rule);border-radius:var(--r-md);padding:1.5rem;line-height:1.85;font-size:.98rem;animation:fadeUp .35s both;box-shadow:none}
.notes-box h4{font-family:var(--f-head);color:var(--a800);font-size:1.2rem;font-weight:600;margin:1.4rem 0 .5rem;padding-bottom:.35rem;border-bottom:1px solid var(--rule)}
.notes-box h4:first-child{margin-top:0}
.notes-box p{margin-bottom:.85rem}
.notes-box li{margin:.45rem 0 .45rem 1.2rem}
.qcard{border:1px solid var(--rule);border-radius:var(--r-md);padding:1.25rem;margin-bottom:14px;animation:fadeUp .35s both;box-shadow:none}
.qcard:nth-child(2){animation-delay:.04s}
.qcard:nth-child(3){animation-delay:.08s}
.qcard:nth-child(4){animation-delay:.12s}
.qcard:nth-child(5){animation-delay:.16s}
.qcard .qt{font-weight:600;font-size:1rem;color:var(--ink);margin-bottom:.9rem;line-height:1.5;white-space:pre-line}
.qopt{padding:.85rem .95rem;border:1px solid var(--rule);border-radius:var(--r-md);margin-bottom:8px;cursor:pointer;font-weight:500;font-size:.94rem;transition:border-color .14s ease,background .14s ease;background:var(--surface);min-height:48px;display:flex;align-items:center}
.qopt:hover{border-color:var(--steel);background:var(--a100)}
.qopt.sel{background:var(--a100);border-color:var(--steel);box-shadow:inset 3px 0 0 var(--steel)}
.qopt.cor{background:var(--a100);border-color:var(--a600);color:var(--a900);box-shadow:inset 3px 0 0 var(--a700);animation:pulseOk .7s ease}
.qopt.wr{background:#fbf0f0;border-color:#c98d8d;color:#7d2f2f;box-shadow:inset 3px 0 0 var(--danger);animation:shake .35s ease}
.qex{margin-top:.75rem;padding:.75rem .95rem;background:var(--n100);border:1px solid var(--rule);border-radius:var(--r-sm);font-size:.88rem;display:none;border-left:2px solid var(--steel)}
.score-box{background-color:var(--a900);color:#fff;border-radius:var(--r-md);padding:1.7rem;text-align:center;margin-bottom:1.1rem;box-shadow:none;animation:popIn .35s cubic-bezier(.2,.8,.3,1)}
.score-box .sc{font-family:var(--f-head);font-size:3.1rem;font-weight:600;letter-spacing:-.02em;line-height:1.05;animation:popIn .4s .1s both}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}


/* ═══════════════════════════════════════════════════════════════════════
   COLOUR LAYER — Industry ramp-ஐ இன்னும் தாராளமாக பயன்படுத்தும் அடுக்கு.
   புதிய நிறங்கள் இல்லை: steel ramp (a100-a900) + accent-2 (#728fab) மட்டும்.
   ═══════════════════════════════════════════════════════════════════════ */
:root{--b100:#eef6ff;--b300:#b7cde0;--b500:#728fab;--b700:#465b70;--b900:#1f2d3a}

/* முகப்பு — hero இன்னும் ஆழமான field, marquee steel */
.marquee-box{background:var(--steel);color:#fff}
.hero{background-color:var(--a800)}
.section-title{color:var(--a900)}
.section-title::after{background:var(--a300)}

/* Course cards — ஒவ்வொன்றுக்கும் ramp-இல் வேறு படி (top rule + icon tile) */
.course-card{border-top:2px solid var(--steel)}
.course-card .course-icon{background:var(--a200);border-color:var(--a300)}
.course-card.g-tet{border-top-color:var(--b500)}
.course-card.g-tet .course-icon{background:var(--b100);border-color:var(--b300)}
#courseList>.course-card:nth-of-type(3n+2){border-top-color:var(--a700)}
#courseList>.course-card:nth-of-type(3n+2) .course-icon{background:var(--a100);border-color:var(--a400)}
#courseList>.course-card:nth-of-type(3n){border-top-color:var(--b700)}
#courseList>.course-card:nth-of-type(3n) .course-icon{background:var(--b100);border-color:var(--b500)}
.price-tag{background:var(--steel);border-color:var(--steel)}
.badge-open{background:var(--a200);border-color:var(--a400);color:var(--a900)}

/* Subject grid — 6 படிகள் சுழற்சியில் */
.subject-card{border-top:2px solid var(--a300)}
.subject-grid .subject-card:nth-child(6n+1){border-top-color:var(--steel)}
.subject-grid .subject-card:nth-child(6n+1) .s-icon{background:var(--a200);border-color:var(--a400)}
.subject-grid .subject-card:nth-child(6n+2){border-top-color:var(--b500)}
.subject-grid .subject-card:nth-child(6n+2) .s-icon{background:var(--b100);border-color:var(--b300)}
.subject-grid .subject-card:nth-child(6n+3){border-top-color:var(--a700)}
.subject-grid .subject-card:nth-child(6n+3) .s-icon{background:var(--a100);border-color:var(--a500)}
.subject-grid .subject-card:nth-child(6n+4){border-top-color:var(--a500)}
.subject-grid .subject-card:nth-child(6n+4) .s-icon{background:var(--a200);border-color:var(--a500)}
.subject-grid .subject-card:nth-child(6n+5){border-top-color:var(--b700)}
.subject-grid .subject-card:nth-child(6n+5) .s-icon{background:var(--b100);border-color:var(--b500)}
.subject-grid .subject-card:nth-child(6n) .s-icon{background:var(--a100);border-color:var(--a300)}

/* Subject / progress fields — ஆழமான steel மற்றும் accent-2 */
.subj-hero{background-color:var(--a800)}
.subj-hero.g-tet{background-color:var(--b700)}
.prog-hero{background-color:var(--a800)}
.prog-fill{background:var(--a300)}
.score-box{background-color:var(--a800)}

/* Test cards — வரிசையாக ramp படிகள் */
.test-card{border-left:2px solid var(--a300)}
.test-card:nth-of-type(4n+1){border-left-color:var(--steel)}
.test-card:nth-of-type(4n+2){border-left-color:var(--b500)}
.test-card:nth-of-type(4n+3){border-left-color:var(--a700)}
.test-card:nth-of-type(4n){border-left-color:var(--a500)}
.test-card .tc-ic{background:var(--a200);border-color:var(--a300)}
.tc-btn.note{background:var(--b100);color:var(--b900);border-color:var(--b300)}
.tc-btn.note:hover{background:var(--b300);border-color:var(--b500)}

/* Today / day-parts — பாட வாரியாக வேறு படி */
.today-date .dd{background:var(--steel)}
.day-part{border-left:3px solid var(--a300)}
.day-part.p-ta{border-left-color:var(--steel)}
.day-part.p-gs{border-left-color:var(--b500)}
.day-part.p-ap{border-left-color:var(--a700)}
.day-part.p-na{border-left-color:var(--a500)}

/* Quiz — சரி / தவறு தெளிவான வண்ணம் */
.qopt.cor{background:#e8f2ea;border-color:#4f7d5c;color:#24402d;box-shadow:inset 3px 0 0 #4f7d5c}
.qopt.wr{background:#fbf0f0;border-color:#b06a6a;color:#7d2f2f;box-shadow:inset 3px 0 0 var(--danger)}
.qex{background:var(--a100);border-color:var(--a300);border-left-color:var(--steel)}

/* Task options, sheet, join, help — tinted */
.task-opt{border-top:2px solid var(--a300)}
.task-opt:nth-of-type(1){border-top-color:var(--steel)}
.task-opt.t{border-top-color:var(--b500)}
.task-opt .to-ic{background:var(--a200);border-color:var(--a300)}
.task-opt.t .to-ic{background:var(--b100);border-color:var(--b300)}
.sheet-row .sr-ic{background:var(--a200);border-color:var(--a300)}
.sheet-row:nth-of-type(even) .sr-ic{background:var(--b100);border-color:var(--b300)}
.mylearn-card{border-left:2px solid var(--steel)}
.mylearn-card .ml-ic{background:var(--a200);border-color:var(--a300)}
.join-btn.wa{background:var(--steel);border-color:var(--steel)}
.join-btn.tg{background:var(--b500);border-color:var(--b500)}
.help-fab{background:var(--steel);border-color:var(--steel)}
.help-fab:hover{background:var(--a600)}
.cv-pay-strip{background-color:var(--a100);border-color:var(--a300)}
.bookref-strip{background-color:var(--b100);border-color:var(--b300);color:var(--b900)}
.today-date{border-color:var(--a300)}
.bn-item.active{color:var(--steel)}
.bn-item.active::after{background:var(--steel);height:3px}
.tab-pill.active{color:var(--steel)}
.tab-pill::after{height:3px}

/* ═══════════════════════════════════════════════════════════════════════
   🎨 MODERN LMS THEME OVERRIDE (EduWorld-style) — CSS மட்டும், structure மாறாது
   navy hero · bright blue · rounded cards · soft shadow · clean font
   ═══════════════════════════════════════════════════════════════════════ */
:root{
  /* palette */
  --ink:#1e293b; --paper:#f4f6fb; --surface:#ffffff; --surface-2:#eef1f7; --steel:#2563eb;
  --a100:#eff5ff; --a200:#dbe8fe; --a300:#bfdbfe; --a400:#93c5fd; --a500:#60a5fa;
  --a600:#2563eb; --a700:#1d4ed8; --a800:#1b355c; --a900:#0f2547;
  --n100:#f5f8fc; --n200:#eef2f7; --n300:#e2e8f0; --n400:#cbd5e1;
  --n500:#94a3b8; --n600:#64748b; --n700:#475569; --n800:#334155; --n900:#1e293b;
  --rule:rgba(15,23,42,.10); --rule-soft:rgba(15,23,42,.06);
  --primary:#2563eb; --primary-light:#eff5ff; --primary-dark:#1d4ed8;
  --primary-deep:#1b355c; --primary-ink:#0f2547;
  --violet:#6366f1; --secondary:#10b981; --accent:#2563eb; --danger:#ef4444;
  --maroon:#1b355c; --maroon-dark:#0f2547; --maroon-light:#eff5ff;
  --teal:#0ea5e9; --pink:#ec4899; --sky:#38bdf8;
  --bg-main:#f4f6fb; --bg-card:#ffffff; --text-main:#1e293b;
  --text-muted:#64748b; --border:rgba(15,23,42,.10); --border-strong:rgba(15,23,42,.20);
  --g-indigo:#0f2547; --g-teal:#0ea5e9; --g-green:#10b981; --g-sunset:#f59e0b;
  --shadow-xs:0 1px 2px rgba(15,23,42,.05);
  --shadow-sm:0 1px 3px rgba(15,23,42,.08);
  --shadow:0 4px 14px rgba(15,23,42,.09);
  --shadow-lg:0 14px 34px rgba(15,23,42,.16);
  --shadow-brand:0 4px 14px rgba(37,99,235,.28);
  --ring:0 0 0 3px rgba(37,99,235,.35);
  --r-sm:8px; --r-md:12px; --r-lg:16px; --r-xl:20px;
  --f-head:'Segoe UI','Noto Sans Tamil','Inter',system-ui,-apple-system,sans-serif;
  --f-body:'Segoe UI','Noto Sans Tamil','Inter',system-ui,-apple-system,sans-serif;
  --mk:transparent; --mk-light:transparent;   /* blueprint registration marks அணை */
  --b100:#eff5ff;--b300:#bfdbfe;--b500:#60a5fa;--b700:#1d4ed8;--b900:#0f2547;
}
/* blueprint grid background அணை */
body::before{display:none!important}
body{background:var(--paper)}
/* registration-mark background block-ஐ சுத்தமாக்கு */
.course-card,.sub-card,.test-card,.content-box,.auth-card,.lock-box,.notes-box,
.qcard,.task-opt,.join-box,.mylearn-card,.day-part,.subject-card,.empty-state,
.plan-frame,.today-date,.bookref-strip,.cv-pay-strip{background-image:none!important}
.subj-hero,.prog-hero,.score-box,.hero{background-image:none!important}

/* headings/labels — condensed/uppercase நீக்கு, clean */
h1,h2,h3,h4,h5,h6{letter-spacing:-.01em}
.section-title,.bn-item .bn-label,.field-label,.brand-tag,.badge-open,.subj-hero .crumb,
.pay-btn,.auth-btn,.done-btn,.sheet-btn,.tc-btn,.login-link,.logout-btn,.dp-go,
.price-tag,.hs-price{text-transform:none!important;letter-spacing:.005em!important}
.section-title::after{opacity:.5}

/* soft shadows + rounded on cards */
.course-card,.sub-card,.test-card,.qcard,.content-box,.task-opt,.day-part,.mylearn-card,
.subject-card,.notes-box{box-shadow:var(--shadow-sm)!important;border-color:var(--rule)!important}
.course-card:hover,.sub-card:hover,.test-card:hover,.task-opt:hover,.day-part:hover{
  box-shadow:var(--shadow)!important;border-color:var(--a400)!important;transform:translateY(-1px)}

/* round icon tiles */
.course-icon,.sub-icon,.task-opt .to-ic{border-radius:14px!important}
.brand-mark,.auth-logo,.user-chip .avatar,.back-btn{border-radius:12px!important}
.brand-mark,.auth-logo{background:linear-gradient(135deg,#2563eb,#1e40af)!important}

/* navbar */
.navbar{box-shadow:0 1px 0 var(--rule)}
.brand-name{color:var(--a900)}
.login-link{background:var(--primary);border-color:var(--primary);border-radius:10px;box-shadow:var(--shadow-brand)}
.login-link:hover{background:var(--primary-dark);border-color:var(--primary-dark)}

/* HERO — navy rounded banner */
.hero{background:linear-gradient(135deg,#0f2547,#1e40af)!important;border-radius:var(--r-lg)!important;
  padding:1.1rem 1.3rem!important;min-height:70px;box-shadow:var(--shadow)!important}
.hero h1{font-size:1.15rem}
.hs-price{background:#fff;color:#1e40af;border-radius:8px}
.subj-hero{background:linear-gradient(135deg,#0f2547,#1e40af)!important;border-radius:var(--r-lg)!important;box-shadow:var(--shadow)!important}
.subj-hero.g-tet{background:linear-gradient(135deg,#1b355c,#2563eb)!important}
.subj-hero .meta span{border-radius:999px;background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.25)}

/* buttons — bright blue, rounded, soft */
.pay-btn,.auth-btn{background:var(--primary)!important;border-color:var(--primary)!important;
  border-radius:12px!important;box-shadow:var(--shadow-brand)!important}
.pay-btn:hover,.auth-btn:hover{background:var(--primary-dark)!important;border-color:var(--primary-dark)!important}
.done-btn{border-radius:12px!important}

/* auth card + inputs */
.auth-card{border-radius:20px!important;box-shadow:var(--shadow-lg)!important}
.auth-input,.phone-input{border-radius:12px!important}
.auth-input:focus,.phone-input:focus-within{border-color:var(--primary)!important;box-shadow:var(--ring)!important}

/* bottom nav */
.bottom-nav{box-shadow:0 -2px 16px rgba(15,23,42,.06)}
.bn-item.active{color:var(--primary)}
.bn-item.active::after{background:var(--primary);border-radius:999px;height:3px}

/* price / badge pills rounded */
.price-tag{background:linear-gradient(135deg,#2563eb,#1e40af)!important;border:none!important;border-radius:999px!important}
.badge-open{border-radius:999px!important;background:var(--a100)!important;color:var(--a700)!important;border-color:var(--a300)!important}

/* ═════ QUIZ — A/B/C/D circles + rounded options (mockup style) ═════ */
.qcard{counter-reset:qopt;border-radius:16px!important;box-shadow:var(--shadow-sm)!important}
.qcard .qt{font-size:1.02rem;font-weight:700}
.qopt{border-radius:12px!important;padding:.8rem .9rem .8rem 3rem!important;position:relative;
  border-color:var(--n300)!important;min-height:52px}
.qopt::before{counter-increment:qopt;content:counter(qopt,upper-alpha);
  position:absolute;left:.7rem;top:50%;transform:translateY(-50%);
  width:26px;height:26px;border-radius:50%;border:1.5px solid var(--n400);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.8rem;color:var(--n600);background:#fff}
.qopt:hover{border-color:var(--primary)!important;background:var(--a100)!important}
.qopt.sel{border-color:var(--primary)!important;background:var(--a100)!important;box-shadow:inset 0 0 0 1px var(--primary)!important}
.qopt.sel::before{border-color:var(--primary);color:#fff;background:var(--primary)}
.qopt.cor{border-color:#16a34a!important;background:#f0fdf4!important;color:#14532d!important;box-shadow:inset 0 0 0 1px #16a34a!important}
.qopt.cor::before{border-color:#16a34a;background:#16a34a;color:#fff}
.qopt.wr{border-color:#ef4444!important;background:#fef2f2!important;color:#7f1d1d!important;box-shadow:inset 0 0 0 1px #ef4444!important}
.qopt.wr::before{border-color:#ef4444;background:#ef4444;color:#fff}
.qex{border-radius:10px!important;border-left:3px solid var(--primary)!important;background:var(--a100)!important}
.test-card{border-radius:14px!important}

/* ===== 📅 முகப்பு "இன்று படிக்க வேண்டியது" ===== */
.today-box{background:linear-gradient(135deg,#ecfdf5,#d1fae5);border:1.5px solid #6ee7b7;border-radius:16px;padding:14px;margin:0 0 14px}
.today-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.today-head .th-ic{font-size:1.5rem;line-height:1}
.today-head .th-t{font-weight:800;color:#065f46;font-size:1.02rem}
.today-head .th-d{font-size:.76rem;color:#047857;font-weight:600;margin-top:1px}
.today-body{display:flex;flex-direction:column;gap:6px}
.today-subj{font-weight:800;font-size:.82rem;color:#0f766e;margin:6px 0 2px;padding-left:2px}
.today-lesson{display:flex;align-items:center;gap:9px;background:#fff;border:1px solid #a7f3d0;border-radius:11px;padding:9px 11px;cursor:pointer;transition:transform .08s,box-shadow .08s}
.today-lesson:active{transform:scale(.985)}
.today-lesson .tl-ic{font-size:1.05rem;flex:none}
.today-lesson .tl-body{flex:1;display:flex;flex-direction:column;min-width:0}
.today-lesson .tl-name{font-weight:700;color:var(--text-main);font-size:.9rem;line-height:1.25}
.today-lesson .tl-meta{font-size:.74rem;color:var(--text-muted);margin-top:1px}
.today-lesson .tl-arrow{color:#059669;font-weight:800;flex:none}
.today-lesson.today-goal{background:linear-gradient(135deg,#fff7ed,#ffedd5);border-color:#fdba74;color:#9a3412;font-weight:700;cursor:default}
.today-course{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid #a7f3d0;border-radius:12px;padding:11px 12px;cursor:pointer;transition:transform .08s}
.today-course:active{transform:scale(.985)}
.today-course .tc-ic{font-size:1.35rem;flex:none}
.today-open{margin-top:10px;width:100%;background:linear-gradient(135deg,#059669,#047857);color:#fff;border:none;border-radius:11px;padding:11px;font-weight:800;font-size:.9rem;cursor:pointer}
.today-open:active{transform:scale(.99)}

/* ✨ இன்று படிக்க வேண்டியது — நாள் ஒன்றுக்கு ஒருமுறை சிறிய intro animation */
.today-intro{animation:todayIntro 2.2s ease-out 1}
@keyframes todayIntro{
  0%{transform:scale(.92);opacity:0;box-shadow:0 0 0 0 rgba(16,185,129,.45)}
  30%{transform:scale(1.03);opacity:1}
  50%{transform:scale(1);box-shadow:0 0 0 10px rgba(16,185,129,0)}
  70%{box-shadow:0 0 0 0 rgba(16,185,129,.35)}
  100%{transform:scale(1);box-shadow:0 0 0 12px rgba(16,185,129,0)}
}

/* ═══════════════════════════════════════════════════════════════════════
   🏠 INDEX HOME TILES — outline மட்டும் (பின்னணி இல்லை), புதிய font design
   ═══════════════════════════════════════════════════════════════════════ */
.home-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:6px 0 14px}
.tile{position:relative;background:transparent;border:1.6px solid var(--tl-1);border-radius:14px;
    padding:16px 14px 13px;min-height:132px;cursor:pointer;overflow:hidden;box-shadow:none;
    transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease;
    display:flex;flex-direction:column;justify-content:flex-start;animation:fadeUp .3s both}
.tile::before,.tile::after{content:none}
.tile:hover{border-color:var(--tl-2);box-shadow:0 0 0 3px var(--tl-bg)}
.tile:active{transform:scale(.98)}
/* ── Font design — Baloo Thambi 2 (தமிழ்+ஆங்கிலம்), வண்ண outline stroke ── */
.tile-name{font-family:var(--f-body);font-size:1.22rem;font-weight:700;line-height:1.35;
    letter-spacing:0;color:var(--tl-2);position:relative;z-index:2;-webkit-text-stroke:0}
.tile-sub{display:block;font-family:var(--f-body);font-size:.75rem;font-weight:500;
    color:var(--text-muted);margin-top:6px;line-height:1.5;letter-spacing:0}
.tile-arrow{position:relative;z-index:2;width:30px;height:30px;border-radius:10px;
    background:transparent;border:1.4px solid var(--tl-1);color:var(--tl-2);
    display:flex;align-items:center;justify-content:center;font-size:1rem;font-weight:700;margin-top:auto}
.tile-ic{position:absolute;right:10px;bottom:8px;font-size:2.4rem;opacity:.1;pointer-events:none;z-index:1}
.tile-badge{position:relative;z-index:2;align-self:flex-start;background:transparent;color:var(--tl-2);
    border:1.3px solid var(--tl-1);border-radius:999px;padding:2px 9px;font-size:.7rem;font-weight:700;margin-top:7px}
/* வண்ண variants — outline நிறங்கள் மட்டும் */
.tile-brown{--tl-1:#c8a887;--tl-2:#8d6e52;--tl-bg:#faf4ec}
.tile-blue{--tl-1:#93c5fd;--tl-2:#1d4ed8;--tl-bg:#eff5ff}
.tile-green{--tl-1:#86efac;--tl-2:#047857;--tl-bg:#ecfdf5}
.tile-orange{--tl-1:#fcd34d;--tl-2:#b45309;--tl-bg:#fffbeb}
/* TET option — light orange நிரப்பு (soft fill) */
.tile-lorange{--tl-1:#fdba74;--tl-2:#c2610c;--tl-bg:#fff3e6;background:#fff3e6}
.tile-lorange:hover{box-shadow:0 0 0 3px #ffe4c7}
/* "இன்று படிக்க வேண்டியது" — full-width outline banner */
.tile-wide{flex-direction:row;align-items:center;justify-content:space-between;min-height:0;padding:14px 16px;margin:0 0 12px;gap:12px}
.tile-wide .tile-arrow{margin-top:0}
.tile-wide .tile-ic{font-size:2.1rem;right:52px;bottom:2px}
.tile.today-intro{animation:fadeUp .4s both, tileGlow 1.6s ease-in-out 2}
@keyframes tileGlow{0%,100%{box-shadow:none}50%{box-shadow:0 0 0 4px rgba(16,185,129,.16)}}
/* accordion sub-options — முகப்பு tiles-க்குக் கீழே */
.subcourses{margin:-2px 0 14px;padding-left:0;border-left:none}

/* வினாப் படம் — question image/diagram */
.q-img-wrap{margin:.25rem 0 .9rem;text-align:center}
.q-img{max-width:100%;height:auto;max-height:440px;border:1px solid var(--rule,#e5e7eb);border-radius:12px;background:#fff;display:inline-block}
.lib-q .q-img-wrap{margin:.45rem 0 .8rem}

/* ═══════════════════════════════════════════════════════════════════════
   🎨 தமிழ் நண்பன் — புதிய HEADER / LOGO வடிவமைப்பு (Coaching Center wordmark)
   Teal→green rounded wordmark + orange "COACHING CENTER" subtitle.
   (இந்த block file-ன் இறுதியில் — cascade-ல் மேலோங்கும்.)
   ═══════════════════════════════════════════════════════════════════════ */
.brand{gap:.5rem}
/* square "த" mark logo-ல் இல்லை — text wordmark மட்டும் */
.brand .brand-mark{display:none!important}
.brand-txt{align-items:center;gap:1px}

.brand-name{
    font-family:'Baloo Thambi 2','Mukta Malar','Noto Sans Tamil',sans-serif!important;
    font-weight:800!important;
    font-size:1.72rem!important;
    line-height:1.34!important;
    padding:.06em 0!important;
    letter-spacing:.005em!important;
    background:linear-gradient(96deg,#0fb5a4 0%,#0e8f74 48%,#157a3a 100%)!important;
    -webkit-background-clip:text!important;background-clip:text!important;
    -webkit-text-fill-color:transparent!important;color:transparent!important;
    white-space:nowrap;
}
.brand-tag{
    font-family:'Baloo Thambi 2','Mukta Malar',sans-serif!important;
    font-weight:800!important;
    font-size:.6rem!important;
    color:#f4801f!important;
    text-transform:uppercase!important;
    letter-spacing:.42em!important;
    text-indent:.42em;            /* letter-spacing-ஐ optical-ஆக center */
    margin-top:1px;
}
@media(max-width:520px){
    .brand-name{font-size:1.5rem!important}
    .brand-tag{font-size:.54rem!important;letter-spacing:.34em!important;text-indent:.34em}
}