/* GNR Robotics LMS – red / white / black theme */
@font-face{font-family:"Inter";src:url("../fonts/inter.8e433c0592f7.woff2") format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"Space Grotesk";src:url("../fonts/space-grotesk.b75d397ffd1c.woff2") format("woff2");font-weight:300 700;font-display:swap}

:root{
  --red:#e10600; --red-600:#c00500; --red-700:#9e0400; --red-50:#fff1f0; --red-100:#ffe0de;
  --ink:#0b0b0c; --ink-2:#151517; --ink-3:#232326; --ink-4:#3a3a3f;
  --paper:#ffffff; --paper-2:#f6f6f7; --line:#e7e7ea; --muted:#6b6b73;
  --radius:16px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(11,11,12,.05),0 10px 30px -14px rgba(11,11,12,.18);
  --shadow-lg:0 2px 4px rgba(11,11,12,.06),0 24px 48px -18px rgba(11,11,12,.28);
  --ease:cubic-bezier(.22,1,.36,1);
  --bs-primary:#e10600; --bs-primary-rgb:225,6,0; --bs-link-color:#c00500; --bs-link-color-rgb:192,5,0;
  --bs-link-hover-color:#9e0400; --bs-link-hover-color-rgb:158,4,0;
  --bs-body-font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --bs-body-color:#1b1b1f; --bs-body-bg:#f6f6f7; --bs-border-color:#e7e7ea;
  --bs-focus-ring-color:rgba(225,6,0,.25);
}
body{background:var(--paper-2);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,h4,h5,h6,.display-font,.navbar-brand{font-family:"Space Grotesk","Inter",system-ui,sans-serif;letter-spacing:-.02em}
h1,h2,h3{font-weight:700} h4,h5,h6{font-weight:600}
a{text-underline-offset:3px}
::selection{background:var(--red);color:#fff}
.text-muted{color:var(--muted)!important}
.text-warning{color:var(--red)!important}
.text-primary{color:var(--red)!important}
.bg-dark{background:var(--ink)!important}

/* ---------- navbar ---------- */
.gnr-nav{background:rgba(11,11,12,.92);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid rgba(255,255,255,.06)}
.gnr-nav .navbar-brand{display:flex;align-items:center;gap:.55rem;font-weight:700;font-size:1.2rem}
.brand-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:linear-gradient(135deg,var(--red),#ff4d40);box-shadow:0 0 0 1px rgba(255,255,255,.12) inset,0 6px 18px -6px rgba(225,6,0,.8);font-size:1.1rem}
.brand-mark i{color:#fff}
.brand-sub{color:var(--red);font-weight:700}
.gnr-nav .nav-link{color:rgba(255,255,255,.72);font-weight:500;font-size:.94rem;position:relative;padding:.5rem .8rem!important;transition:color .2s}
.gnr-nav .nav-link:hover,.gnr-nav .nav-link.active{color:#fff}
.gnr-nav .nav-link::after{content:"";position:absolute;left:.8rem;right:.8rem;bottom:.2rem;height:2px;border-radius:2px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease)}
.gnr-nav .nav-link:hover::after,.gnr-nav .nav-link.active::after{transform:scaleX(1)}
.gnr-nav .dropdown-toggle::after{display:none}
.nav-count{display:inline-grid;place-items:center;min-width:18px;height:18px;padding:0 5px;margin-left:4px;border-radius:9px;background:var(--red);color:#fff;font-size:.68rem;font-weight:700;vertical-align:1px}
.role-chip{font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:.2rem .5rem;border-radius:6px;background:rgba(225,6,0,.16);color:#ff7a70;border:1px solid rgba(225,6,0,.35)}
.avatar{width:32px;height:32px;border-radius:50%;display:inline-grid;place-items:center;background:var(--ink-3);color:#fff;font-weight:700;font-size:.85rem;border:1px solid rgba(255,255,255,.15)}
.dropdown-menu{border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-lg);padding:.4rem;animation:pop .18s var(--ease)}
.dropdown-item{border-radius:8px;padding:.5rem .75rem;font-size:.92rem}
.dropdown-item:active,.dropdown-item.active{background:var(--red)}
.dropdown-item i{color:var(--red);margin-right:.35rem}

/* ---------- buttons ---------- */
.btn{font-weight:600;border-radius:10px;transition:transform .2s var(--ease),box-shadow .2s,background-color .2s,border-color .2s,color .2s}
.btn:active{transform:translateY(1px) scale(.99)}
.btn-lg{border-radius:12px;padding:.75rem 1.4rem}
.btn-primary{--bs-btn-bg:var(--red);--bs-btn-border-color:var(--red);--bs-btn-hover-bg:var(--red-600);--bs-btn-hover-border-color:var(--red-600);--bs-btn-active-bg:var(--red-700);--bs-btn-active-border-color:var(--red-700);--bs-btn-disabled-bg:var(--red);--bs-btn-disabled-border-color:var(--red);box-shadow:0 6px 16px -8px rgba(225,6,0,.7)}
.btn-primary:hover{box-shadow:0 10px 22px -8px rgba(225,6,0,.75);transform:translateY(-1px)}
.btn-outline-primary{--bs-btn-color:var(--red-600);--bs-btn-border-color:rgba(225,6,0,.45);--bs-btn-hover-bg:var(--red);--bs-btn-hover-border-color:var(--red);--bs-btn-active-bg:var(--red-700);--bs-btn-active-border-color:var(--red-700)}
.btn-warning{--bs-btn-bg:var(--ink);--bs-btn-border-color:var(--ink);--bs-btn-color:#fff;--bs-btn-hover-bg:#000;--bs-btn-hover-border-color:#000;--bs-btn-hover-color:#fff;--bs-btn-active-bg:#000;--bs-btn-active-color:#fff}
.btn-warning:hover{transform:translateY(-1px);box-shadow:0 10px 22px -10px rgba(0,0,0,.6)}
.btn-light{--bs-btn-bg:#fff;--bs-btn-border-color:var(--line);--bs-btn-hover-bg:var(--red-50);--bs-btn-hover-border-color:var(--red-100);--bs-btn-hover-color:var(--red-600)}
.btn-outline-secondary{--bs-btn-color:var(--ink-3);--bs-btn-border-color:var(--line);--bs-btn-hover-bg:var(--ink);--bs-btn-hover-border-color:var(--ink)}
.btn-ghost-light{color:#fff;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.04)}
.btn-ghost-light:hover{color:#fff;border-color:#fff;background:rgba(255,255,255,.1)}
.btn-glow{position:relative;overflow:hidden}
.btn-glow::before{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 30%,rgba(255,255,255,.35) 50%,transparent 70%);transform:translateX(-120%);transition:transform .7s var(--ease)}
.btn-glow:hover::before{transform:translateX(120%)}

/* ---------- forms ---------- */
.form-control,.form-select{border-radius:10px;border-color:var(--line);padding:.6rem .85rem;transition:border-color .2s,box-shadow .2s}
.form-control:focus,.form-select:focus{border-color:var(--red);box-shadow:0 0 0 4px rgba(225,6,0,.12)}
.form-check-input:checked{background-color:var(--red);border-color:var(--red)}
.form-check-input:focus{border-color:var(--red);box-shadow:0 0 0 4px rgba(225,6,0,.12)}
.form-label{font-size:.9rem}

/* ---------- surfaces ---------- */
.card{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff}
.card-hover{transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s}
.card-hover:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(225,6,0,.25)}
.card-dark{background:var(--ink-2);border-color:rgba(255,255,255,.08);color:#f3f3f4}
.card-dark .text-muted{color:#9a9aa3!important}
.list-group{--bs-list-group-border-color:var(--line);--bs-list-group-border-radius:var(--radius);--bs-list-group-active-bg:var(--red);--bs-list-group-active-border-color:var(--red)}
.list-group-item-action{transition:background-color .2s,padding-left .25s var(--ease)}
.list-group-item-action:hover{background:var(--red-50)}
.table{--bs-table-hover-bg:var(--red-50)}
.table thead th{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600;border-bottom-color:var(--line);background:#fafafa}
.table>:not(caption)>*>*{padding:.7rem .8rem}
.badge{font-weight:600;border-radius:6px;padding:.35em .6em}
.text-bg-primary{background:var(--red)!important}
.text-bg-light{background:var(--paper-2)!important;color:var(--ink-3)!important;border:1px solid var(--line)}
.alert{border-radius:12px;border:0}
.alert-success{background:#ecfdf3;color:#05603a}
.alert-info{background:#f2f2f4;color:var(--ink-3)}
.alert-danger{background:var(--red-50);color:var(--red-700)}
.pagination{--bs-pagination-color:var(--ink-3);--bs-pagination-active-bg:var(--red);--bs-pagination-active-border-color:var(--red);--bs-pagination-border-radius:10px}
.progress{background:#ececef;border-radius:99px;overflow:hidden}
.progress-bar,.gnr-bar{background:linear-gradient(90deg,var(--red),#ff4d40);border-radius:99px;transition:width 1.2s var(--ease)}
.progress-bar.bg-success{background:linear-gradient(90deg,#111,#3a3a3f)!important}

/* page header */
.page-head{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:1rem;margin-bottom:1.5rem}
.page-head h1,.page-head h2,.page-head h3{margin:0}
.eyebrow{font-size:.75rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--red)}
.section-title{font-size:1.15rem;font-weight:700;margin-bottom:.9rem;display:flex;align-items:center;gap:.5rem}
.section-title::before{content:"";width:4px;height:1.1em;border-radius:2px;background:var(--red)}

/* stat tiles */
.stat{position:relative;overflow:hidden;padding:1.25rem 1.3rem;display:block;text-decoration:none;color:inherit}
.stat .stat-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:var(--red-50);color:var(--red);font-size:1.25rem;margin-bottom:.8rem}
.stat .stat-num{font-family:"Space Grotesk",sans-serif;font-size:2.1rem;font-weight:700;line-height:1;color:var(--ink)}
.stat .stat-label{font-size:.85rem;color:var(--muted);margin-top:.35rem}
.stat.card-dark .stat-icon{background:rgba(225,6,0,.15);color:#ff5a4f}
.stat.card-dark .stat-num{color:#fff}

/* hero */
.hero-dark{position:relative;overflow:hidden;background:radial-gradient(1200px 500px at 85% -10%,rgba(225,6,0,.35),transparent 60%),radial-gradient(800px 400px at -10% 110%,rgba(225,6,0,.18),transparent 60%),var(--ink);color:#fff}
.hero-dark .rb-bg{position:absolute;inset:0;opacity:0;transition:opacity 1.6s ease}
.hero-dark .rb-bg.is-live{opacity:.9}
.hero-dark .hero-inner{position:relative;z-index:1}
.hero-dark .lead{color:rgba(255,255,255,.75)}
.hero-title{font-size:clamp(2.4rem,6vw,4.6rem);line-height:1.02;font-weight:700;letter-spacing:-.035em}
.hero-title .gradient-text{display:inline-flex}
.hero-title .accent{color:var(--red)}
.pill{display:inline-flex;align-items:center;gap:.5rem;padding:.35rem .8rem;border-radius:99px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);font-size:.82rem;font-weight:600}
.pill .dot{width:8px;height:8px;border-radius:50%;background:var(--red);box-shadow:0 0 0 4px rgba(225,6,0,.25);animation:pulse 2s infinite}
.hero-stats{display:flex;gap:2.5rem;flex-wrap:wrap}
.hero-stats .n{font-family:"Space Grotesk",sans-serif;font-size:2.2rem;font-weight:700;line-height:1}
.hero-stats .l{font-size:.75rem;text-transform:uppercase;letter-spacing:.12em;color:rgba(255,255,255,.55);margin-top:.3rem}
.feature{padding:1.5rem}
.feature i{font-size:1.5rem;color:var(--red)}
.page-banner{background:var(--ink);color:#fff;border-radius:var(--radius);padding:1.75rem 2rem;position:relative;overflow:hidden}
.page-banner::after{content:"";position:absolute;right:-80px;top:-80px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(225,6,0,.55),transparent 70%)}
.page-banner>*{position:relative;z-index:1}
.page-banner .text-muted{color:rgba(255,255,255,.6)!important}

/* courses */
.course-card{overflow:hidden;height:100%}
.course-thumb{height:160px;width:100%;object-fit:cover;background:var(--ink-2);transition:transform .6s var(--ease)}
.course-card:hover .course-thumb{transform:scale(1.04)}
.thumb-wrap{overflow:hidden;position:relative}
.thumb-placeholder{height:160px;display:grid;place-items:center;font-size:3rem;color:#fff;background:radial-gradient(circle at 30% 20%,rgba(225,6,0,.85),transparent 60%),var(--ink)}
.thumb-placeholder i{opacity:.9;transition:transform .6s var(--ease)}
.course-card:hover .thumb-placeholder i{transform:scale(1.12) rotate(-6deg)}
.lesson-list .list-group-item.active{background:var(--red);border-color:var(--red)}
.lesson-row{display:flex;align-items:center;gap:1rem}
.lesson-num{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:var(--paper-2);font-weight:700;font-size:.85rem;flex-shrink:0}
.lesson-row.done .lesson-num{background:var(--ink);color:#fff}
.ratio iframe,.ratio video{border-radius:var(--radius)}
.gallery-img{height:210px;object-fit:cover;width:100%;border-radius:12px;cursor:zoom-in;transition:transform .5s var(--ease),filter .5s}
.gallery-img:hover{transform:scale(1.02);filter:saturate(1.1)}
.quiz-q{border-left:4px solid var(--red)}
.choice-right{background:#ecfdf3;border:1px solid #abefc6}.choice-wrong{background:var(--red-50);border:1px solid var(--red-100)}
.quiz-option{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;border:1px solid var(--line);border-radius:12px;margin-bottom:.5rem;cursor:pointer;transition:border-color .2s,background .2s,transform .2s var(--ease)}
.quiz-option:hover{border-color:rgba(225,6,0,.4);background:var(--red-50)}
.quiz-option:has(input:checked){border-color:var(--red);background:var(--red-50);box-shadow:0 0 0 3px rgba(225,6,0,.1)}
.quiz-option input{margin:0;flex-shrink:0}

/* ---------- doubts ---------- */
.doubt-tabs{display:flex;gap:.25rem;padding:.3rem;background:#fff;border:1px solid var(--line);border-radius:12px;overflow-x:auto}
.doubt-tabs a{white-space:nowrap;padding:.5rem .9rem;border-radius:9px;text-decoration:none;color:var(--ink-4);font-weight:600;font-size:.9rem;transition:background .2s,color .2s}
.doubt-tabs a:hover{background:var(--paper-2);color:var(--ink)}
.doubt-tabs a.active{background:var(--ink);color:#fff}
.doubt-tabs .cnt{display:inline-block;margin-left:.35rem;font-size:.72rem;padding:.05rem .45rem;border-radius:99px;background:rgba(0,0,0,.07)}
.doubt-tabs a.active .cnt{background:var(--red);color:#fff}
.doubt-item{display:flex;gap:1rem;padding:1.1rem 1.2rem;text-decoration:none;color:inherit}
.doubt-item+.doubt-item{border-top:1px solid var(--line)}
.doubt-item:hover{background:var(--red-50)}
.doubt-item:hover .doubt-title{color:var(--red-600)}
.doubt-title{font-weight:600;font-size:1.02rem;transition:color .2s}
.status-dot{width:12px;height:12px;border-radius:50%;margin-top:.4rem;flex-shrink:0}
.status-open{background:#fff;border:3px solid var(--red)}
.status-answered{background:var(--red);box-shadow:0 0 0 4px rgba(225,6,0,.15)}
.status-resolved{background:var(--ink)}
.status-badge{font-size:.72rem;font-weight:700;letter-spacing:.03em;padding:.25rem .55rem;border-radius:6px;text-transform:uppercase}
.status-badge.open{background:var(--red-50);color:var(--red-600)}
.status-badge.answered{background:var(--red);color:#fff}
.status-badge.resolved{background:var(--ink);color:#fff}
.meta-chip{display:inline-flex;align-items:center;gap:.3rem;font-size:.78rem;color:var(--muted);background:var(--paper-2);border:1px solid var(--line);padding:.15rem .5rem;border-radius:6px}
.metoo-btn{display:inline-flex;align-items:center;gap:.45rem;border:1px solid var(--line);background:#fff;padding:.45rem .85rem;border-radius:99px;font-weight:600;font-size:.88rem;transition:all .25s var(--ease)}
.metoo-btn:hover{border-color:var(--red);color:var(--red)}
.metoo-btn.on{background:var(--red);border-color:var(--red);color:#fff}
.metoo-btn.on i{animation:pop .35s var(--ease)}
.thread{position:relative}
.msg{display:flex;gap:.8rem;margin-bottom:1rem;animation:fadeUp .5s var(--ease) both}
.msg .avatar{flex-shrink:0;width:38px;height:38px;background:var(--paper-2);color:var(--ink);border-color:var(--line)}
.msg.staff .avatar{background:var(--red);color:#fff;border-color:var(--red)}
.msg-body{flex:1;background:#fff;border:1px solid var(--line);border-radius:4px 16px 16px 16px;padding:.9rem 1.1rem;box-shadow:var(--shadow)}
.msg.staff .msg-body{border-color:rgba(225,6,0,.25)}
.msg.accepted .msg-body{border:2px solid var(--ink);box-shadow:0 0 0 4px rgba(11,11,12,.06),var(--shadow)}
.msg.mine{flex-direction:row-reverse}
.msg.mine .msg-body{background:var(--ink);color:#f2f2f3;border-color:var(--ink);border-radius:16px 4px 16px 16px}
.msg.mine .text-muted{color:#a1a1aa!important}
.msg.mine a{color:#ff7a70}
.best-tag{display:inline-flex;align-items:center;gap:.3rem;background:var(--ink);color:#fff;font-size:.72rem;font-weight:700;padding:.2rem .55rem;border-radius:6px;text-transform:uppercase;letter-spacing:.04em}
.msg-body pre,.doubt-body pre{background:var(--ink);color:#f5f5f5;border-radius:10px;padding:.8rem 1rem;font-size:.85rem;overflow-x:auto}
.msg.mine .msg-body pre{background:#000}
.doubt-body{font-size:1.02rem;line-height:1.65}
.reply-box{scroll-margin-top:90px}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.5rem}
.cat-option{position:relative}
.cat-option input{position:absolute;opacity:0;pointer-events:none}
.cat-option label{display:flex;align-items:center;gap:.5rem;padding:.65rem .8rem;border:1px solid var(--line);border-radius:12px;cursor:pointer;font-size:.88rem;font-weight:600;background:#fff;transition:all .2s var(--ease);height:100%}
.cat-option label i{color:var(--red);font-size:1.1rem}
.cat-option label:hover{border-color:rgba(225,6,0,.4)}
.cat-option input:checked+label{border-color:var(--red);background:var(--red-50);box-shadow:0 0 0 3px rgba(225,6,0,.12)}
.cat-option input:focus-visible+label{outline:2px solid var(--red);outline-offset:2px}
.similar-box{border:1px dashed rgba(225,6,0,.4);background:var(--red-50);border-radius:12px;padding:.8rem 1rem}
.dropzone{border:2px dashed var(--line);border-radius:12px;padding:1rem;text-align:center;color:var(--muted);transition:border-color .2s,background .2s;cursor:pointer}
.dropzone:hover,.dropzone.drag{border-color:var(--red);background:var(--red-50)}
.tip-list li{margin-bottom:.5rem}
.tip-list i{color:var(--red)}

/* certificate */
.cert{background:#fff;border:14px solid var(--ink);outline:3px solid var(--red);outline-offset:-24px;padding:3.5rem 3rem;text-align:center;max-width:1000px;margin:auto;aspect-ratio:1.414/1;display:flex;flex-direction:column;justify-content:center;font-family:Georgia,serif}
.cert h1{font-size:2.6rem;color:var(--ink);letter-spacing:.05em;font-family:Georgia,serif}.cert .name{font-size:2.4rem;font-style:italic;border-bottom:2px solid var(--red);display:inline-block;padding:0 2rem}

/* footer */
.gnr-footer{background:var(--ink);color:rgba(255,255,255,.55);border-top:3px solid var(--red)}
.gnr-footer a{color:rgba(255,255,255,.8);text-decoration:none}.gnr-footer a:hover{color:#fff}

/* login */
.auth-wrap{min-height:calc(100vh - 64px);display:grid;grid-template-columns:1.1fr 1fr}
.auth-side{position:relative;overflow:hidden}
.auth-form{display:grid;place-items:center;padding:2rem 1.25rem;background:#fff}
.auth-form .inner{width:100%;max-width:400px}
@media (max-width:991px){.auth-wrap{grid-template-columns:1fr}.auth-side{min-height:260px}}

/* React Bits spotlight layer (sits behind server-rendered card content) */
.rb-spot{isolation:isolate;position:relative}
.rb-spot-layer{position:absolute;inset:0;z-index:-1;pointer-events:none;border-radius:inherit}
.rb-spot-layer .rb-spot-inner{position:absolute;inset:0;padding:0;border-radius:inherit;background:transparent!important;box-shadow:none!important}
.rb-spot-layer .spotlight-card__border{display:none}
[data-rb="counter"],[data-rb="shiny"],[data-rb="gradient"]{display:inline-block}

/* ---------- motion ---------- */
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes pop{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:none}}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(225,6,0,.5)}50%{box-shadow:0 0 0 6px rgba(225,6,0,0)}}
.reveal{animation:fadeUp .7s var(--ease) both;animation-delay:calc(var(--i,0) * 70ms)}
.alert{animation:fadeUp .4s var(--ease) both}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}

@media print{nav,footer,.no-print{display:none!important}body{background:#fff}main{padding:0!important}.cert{box-shadow:none;width:100%;max-width:none}@page{size:A4 landscape;margin:8mm}}

/* WCAG AA contrast for status text on light card backgrounds */
.text-success{color:#067647!important}
.text-danger{color:#b42318!important}