/* BD Teacher — premium theme on top of Bootstrap 5.3 */
:root{
  --ink:#10242b;--teal:#0f5c5c;--teal-d:#0a4444;--teal-l:#e6f2f0;
  --gold:#f2c744;--gold-d:#e0b12c;--bg:#f5f8f7;--line:#e1e9e7;--mut:#62787a;
  --bs-primary:#0f5c5c;--bs-body-font-family:'Hind Siliguri',system-ui,sans-serif;
  --r:16px;--shadow:0 10px 30px rgba(16,36,43,.08);
}
html{scroll-behavior:smooth}
body{font-family:'Hind Siliguri',system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;min-height:100vh;display:flex;flex-direction:column}
main.site-main{flex:1;padding-top:28px;padding-bottom:64px}
a{color:var(--teal)}
h1{font-weight:700;letter-spacing:-.01em;font-size:clamp(1.6rem,3.5vw,2.3rem)}
.mut{color:var(--mut);font-size:.95rem}

/* Navbar */
.site-nav{background:linear-gradient(135deg,var(--teal-d),var(--teal));box-shadow:0 4px 20px rgba(10,68,68,.25)}
.site-nav .navbar-brand{font-weight:700;font-size:1.3rem;color:#fff}
.site-nav .navbar-brand span{color:var(--gold)}
.site-nav .nav-link{color:rgba(255,255,255,.88);font-weight:500;padding:.5rem .9rem;border-radius:10px}
.site-nav .nav-link:hover{background:rgba(255,255,255,.12);color:#fff}
.site-nav .navbar-toggler{border-color:rgba(255,255,255,.4)}
.site-nav .navbar-toggler-icon{filter:invert(1)}

/* Buttons (works with legacy .btn.grn/.sec/.red) */
.btn{font-weight:600;border-radius:12px;padding:.6rem 1.2rem;transition:.18s;border:0;color:var(--ink)}
.btn{background:var(--gold);color:var(--ink)!important}
.btn:hover{background:var(--gold-d);transform:translateY(-1px);box-shadow:0 6px 16px rgba(242,199,68,.4)}
.btn.grn{background:var(--teal);color:#fff!important}
.btn.grn:hover{background:var(--teal-d);box-shadow:0 6px 16px rgba(15,92,92,.3)}
.btn.sec{background:#fff;border:1px solid var(--line);color:var(--ink)!important}
.btn.red{background:#c0322b;color:#fff!important}
.btn:focus-visible{outline:3px solid rgba(15,92,92,.35);outline-offset:2px}

/* Cards, forms, boxes */
.card,.box,.filters{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:1.25rem;box-shadow:0 2px 8px rgba(16,36,43,.04)}
.card{transition:.2s}
.card:hover{box-shadow:var(--shadow);border-color:#cfdedb}
label,.form-label{font-weight:600;font-size:.92rem;margin:.8rem 0 .3rem;display:block}
input:not([type=checkbox]):not([type=radio]):not([type=file]),select,textarea{
  width:100%;padding:.65rem .9rem;border:1px solid var(--line);border-radius:12px;background:#fbfdfc;font:inherit;transition:.15s}
input:focus,select:focus,textarea:focus{outline:0;border-color:var(--teal);box-shadow:0 0 0 4px rgba(15,92,92,.12);background:#fff}
.filters{display:grid;grid-template-columns:2fr 1fr 1fr auto;gap:.75rem;margin-bottom:1.25rem;padding:1rem;box-shadow:var(--shadow);align-items:center}
.filters label{margin:0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:1.1rem}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin-bottom:1.5rem}
.stats .card b{font-size:2rem;display:block;line-height:1.2;color:var(--teal)}

/* Tags, messages */
.tag{display:inline-block;background:var(--teal-l);color:var(--teal);padding:2px 12px;border-radius:99px;font-size:.82rem;font-weight:500;margin:2px 3px 2px 0}
.msg{padding:.85rem 1.1rem;border-radius:12px;margin-bottom:1rem;border:1px solid transparent}
.msg.ok{background:#e4f6ea;border-color:#bfe5cb;color:#1b5e32}
.msg.err{background:#fdeceb;border-color:#f6c9c6;color:#8c1f19}
.msg.warn{background:#fff6d9;border-color:#f3dd93;color:#7a5a00}

/* Tables */
table{width:100%;background:#fff;border-collapse:collapse}
th{background:var(--teal-l);color:var(--teal);font-weight:600;font-size:.88rem}
td,th{padding:.75rem;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.table-wrap,.card table{display:block;overflow-x:auto}

.pg{margin-top:1.5rem;display:flex;gap:.5rem;flex-wrap:wrap;justify-content:center}

/* Auth pages */
.auth-wrap{max-width:460px;margin:2rem auto}
.auth-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:2rem;box-shadow:var(--shadow)}
.auth-icon{width:56px;height:56px;border-radius:16px;background:var(--teal-l);display:grid;place-items:center;font-size:1.6rem;margin-bottom:1rem}

/* Hero */
.hero{background:linear-gradient(135deg,var(--teal-d),var(--teal) 60%,#168080);color:#fff;border-radius:24px;padding:clamp(1.5rem,5vw,3rem);margin-bottom:1.5rem;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;background:rgba(242,199,68,.18)}
.hero h1{color:#fff;margin:0 0 .4rem;position:relative}
.hero p{color:rgba(255,255,255,.85);margin:0;position:relative}

/* Responsive */
@media(max-width:991px){.filters{grid-template-columns:1fr 1fr}.filters .btn{grid-column:1/-1}}
@media(max-width:575px){
  .filters,.row2{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr}
  .auth-card{padding:1.4rem}
  main.site-main{padding-top:18px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* Search filters */
.filter-box{background:#fff;border:1px solid var(--line);border-radius:20px;padding:1.1rem;margin-bottom:1.25rem;box-shadow:var(--shadow);position:relative;margin-top:-2.2rem;z-index:2}
.search-field{position:relative}
.search-field input{padding-left:2.6rem!important;height:48px;border-radius:14px!important}
.search-ico{position:absolute;left:.9rem;top:50%;transform:translateY(-50%);opacity:.6}
.filter-box select{height:48px;border-radius:14px}
.chip-row{display:flex;align-items:center;gap:.5rem;margin-top:.9rem;flex-wrap:wrap}
.chip-row.scroll{flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px;scrollbar-width:thin}
.chip-label{font-size:.8rem;font-weight:600;color:var(--mut);min-width:48px}
.fchip{white-space:nowrap;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:99px;padding:.3rem .9rem;font:inherit;font-size:.9rem;cursor:pointer;transition:.15s}
.fchip small{opacity:.55;margin-left:2px}
.fchip:hover{border-color:var(--teal);color:var(--teal)}
.fchip.on{background:var(--teal);border-color:var(--teal);color:#fff}
.adv-toggle{margin-top:.9rem;background:none;border:0;color:var(--teal);font-weight:600;padding:0;cursor:pointer}
.result-bar{display:flex;flex-wrap:wrap;gap:.6rem 1rem;align-items:center;justify-content:space-between;margin-bottom:1rem}
.active-chips{display:flex;flex-wrap:wrap;gap:.4rem}
.achip{background:var(--teal-l);color:var(--teal);border-radius:99px;padding:.15rem .75rem;font-size:.85rem;text-decoration:none;font-weight:500}
.achip:hover{background:#d3e8e4}.achip.clear{background:#fdeceb;color:#8c1f19}
#results{transition:opacity .15s}#results.loading{opacity:.45;pointer-events:none}
@media(max-width:575px){.filter-box{margin-top:-1.4rem;padding:.9rem}.chip-label{min-width:100%}.chip-row.scroll .chip-label{min-width:auto}}

/* ===== Header v2 ===== */
.site-nav .nav-link.active{background:rgba(255,255,255,.16);color:#fff}
.site-nav .nav-link i{margin-right:2px;opacity:.85}
.site-nav .dropdown-menu{border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:.4rem}
.site-nav .dropdown-item{border-radius:10px;font-weight:500;padding:.5rem .8rem}
.site-nav .dropdown-item i{margin-right:6px;color:var(--teal)}
.nav-count{background:#e5484d;color:#fff;border-radius:99px;font-size:.7rem;padding:1px 7px;font-weight:700;vertical-align:1px}
.plan-pill{font-weight:700!important;border:1px solid rgba(255,255,255,.35)}
.plan-pill.plan-free{background:rgba(255,255,255,.1)}
.plan-pill.plan-standard{background:var(--gold);color:var(--ink)!important;border-color:var(--gold)}
.plan-pill.plan-premium{background:linear-gradient(135deg,#f2c744,#ff9f43);color:#3b2400!important;border-color:transparent;box-shadow:0 0 0 3px rgba(242,199,68,.25)}

/* ===== Footer v2 ===== */
.site-foot{background:var(--ink);color:rgba(255,255,255,.72);padding:2.5rem 0 1.2rem;font-size:.92rem;margin-top:auto}
.site-foot a{color:rgba(255,255,255,.78);text-decoration:none;display:block;padding:2px 0}
.site-foot a:hover{color:var(--gold)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:2rem}
.foot-brand{font-weight:700;font-size:1.2rem;color:#fff;margin-bottom:.4rem}
.foot-brand span{color:var(--gold)}
.site-foot h6{color:#fff;font-weight:600;margin-bottom:.6rem}
.foot-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem;border-top:1px solid rgba(255,255,255,.12);margin-top:1.8rem;padding-top:1rem;font-size:.85rem}
.foot-bottom a{display:inline;color:var(--gold)}
@media(max-width:767px){.foot-grid{grid-template-columns:1fr;gap:1.2rem}}

/* ===== Premium UI ===== */
.upsell{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;background:linear-gradient(135deg,#fff9e6,#fff);border:1px dashed var(--gold-d);border-radius:var(--r);padding:1rem 1.2rem;margin:1rem 0}
.upsell-ico{font-size:1.6rem}
.upsell-body{flex:1;min-width:200px;display:flex;flex-direction:column}
.upsell-body span{color:var(--mut);font-size:.9rem}
.tier-tag{display:inline-block;font-size:.72rem;font-weight:700;padding:1px 9px;border-radius:99px;margin-left:6px;vertical-align:2px}
.tier-tag.standard{background:#fff3c4;color:#7a5a00}.tier-tag.premium{background:#ffe3c2;color:#8a3b00}
.pp-page-head{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between;margin-bottom:1.2rem}
.pp-page-head h1{margin:0}
.meter{height:10px;border-radius:99px;background:var(--teal-l);overflow:hidden}
.meter>i{display:block;height:100%;background:linear-gradient(90deg,var(--teal),#2aa198);border-radius:99px}
.meter.full>i{background:linear-gradient(90deg,#e5484d,#ff8a65)}
.kpi{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:1rem;margin-bottom:1.2rem}
.kpi .card b{display:block;font-size:1.9rem;color:var(--teal);line-height:1.2}
.kpi .card small{color:var(--mut)}
.kpi .card.locked{position:relative;overflow:hidden}
.kpi .card.locked b{filter:blur(6px);user-select:none}
.kpi .card.locked::after{content:"🔒";position:absolute;right:12px;top:10px}
.inq{border:1px solid var(--line);border-radius:var(--r);background:#fff;padding:1rem 1.2rem;margin-bottom:.9rem}
.inq.is-new{border-left:4px solid var(--teal)}
.inq.is-locked{position:relative;background:#fafafa}
.inq.is-locked .blur{filter:blur(5px);user-select:none;pointer-events:none}
.inq-meta{display:flex;flex-wrap:wrap;gap:.4rem .9rem;color:var(--mut);font-size:.88rem}
.st-pill{font-size:.75rem;font-weight:700;padding:2px 10px;border-radius:99px}
.st-new{background:#e6f2f0;color:var(--teal)}.st-contacted{background:#fff3c4;color:#7a5a00}.st-closed{background:#eceff1;color:#546e7a}
.cmp-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:var(--r);margin-top:1.5rem}
.cmp{width:100%;min-width:620px;border-collapse:collapse}
.cmp th,.cmp td{padding:.7rem .9rem;border-bottom:1px solid var(--line);text-align:center}
.cmp th:first-child,.cmp td:first-child{text-align:left;font-weight:600}
.cmp thead th{background:var(--teal-l);color:var(--teal)}
.cmp .hl{background:#fffbea}
.cmp tr:last-child td{border-bottom:0}
.teacher-tagline{font-size:.88rem;color:var(--teal);font-weight:500;margin-top:2px}
.demo-chip{display:inline-block;background:#e4f6ea;color:#1b5e32;border-radius:99px;font-size:.75rem;font-weight:700;padding:1px 10px;margin-top:4px}
.bars{display:flex;align-items:flex-end;gap:3px;height:150px;padding-top:10px}
.bars .bar{flex:1;background:linear-gradient(180deg,var(--teal),#2aa198);border-radius:4px 4px 0 0;min-height:2px;position:relative}
.bars .bar:hover{background:var(--gold-d)}
.bars .bar:hover::after{content:attr(data-tip);position:absolute;bottom:100%;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;font-size:.72rem;padding:2px 8px;border-radius:6px;white-space:nowrap;margin-bottom:4px}
.bars-axis{display:flex;justify-content:space-between;color:var(--mut);font-size:.78rem;margin-top:4px}
.tp-tagline{color:rgba(255,255,255,.92);font-weight:500;margin:2px 0 6px}