/* assets/css/style.css */
:root{--bg:#080c14;--surface:#0d1322;--surface2:#111827;--border:#1e2d4a;--green:#00ff88;--green2:#00c866;--blue:#00aaff;--yellow:#ffd700;--red:#ff4455;--purple:#7c3aed;--text:#c8d8f0;--muted:#4a6080;--mono:'Share Tech Mono',monospace;--display:'Rajdhani',sans-serif;--body-font:'Exo 2',sans-serif;--glow:0 0 8px rgba(0,255,136,.45),0 0 20px rgba(0,255,136,.12)}
*,*::before,*::after{box-sizing:border-box}
html,body{min-height:100vh;background:var(--bg);color:var(--text);font-family:var(--body-font);font-size:15px}
body{display:flex;flex-direction:column}
.grid-bg{position:fixed;inset:0;z-index:0;pointer-events:none;background-image:linear-gradient(rgba(0,255,136,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(0,255,136,.025) 1px,transparent 1px);background-size:44px 44px;animation:gridMove 25s linear infinite}
@keyframes gridMove{to{background-position:44px 44px}}
.ctf-nav{background:rgba(8,12,20,.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);z-index:100}
.ctf-nav .navbar-brand{font-family:var(--display);font-size:1.35rem;font-weight:800;color:var(--green)!important;letter-spacing:1px}
.ctf-nav .nav-link{color:var(--text)!important;font-family:var(--display);font-weight:600;font-size:.9rem;padding:.35rem .75rem!important;border-radius:4px;transition:color .15s,background .15s}
.ctf-nav .nav-link:hover,.ctf-nav .nav-link.active{color:var(--green)!important;background:rgba(0,255,136,.07)}
.pts-badge{font-family:var(--mono);font-size:.82rem;padding:.2rem .75rem;border-radius:20px;background:rgba(0,255,136,.08);border:1px solid rgba(0,255,136,.22);color:var(--green)}
.ctf-drop{background:var(--surface);border:1px solid var(--border)}.ctf-drop .dropdown-item{color:var(--text)}.ctf-drop .dropdown-item:hover{background:rgba(0,255,136,.07);color:var(--green)}.ctf-drop .dropdown-divider{border-color:var(--border)}
.site-main{flex:1;position:relative;z-index:1}
.btn-ctf{background:linear-gradient(135deg,var(--green2),var(--green));color:#000!important;font-family:var(--display);font-weight:700;border:none;letter-spacing:.4px;transition:box-shadow .2s,transform .1s}
.btn-ctf:hover{box-shadow:var(--glow);transform:translateY(-1px)}
.btn-outline-ctf{border:1px solid var(--green);color:var(--green);background:transparent;font-family:var(--display);font-weight:600;transition:all .15s}
.btn-outline-ctf:hover{background:rgba(0,255,136,.08);box-shadow:var(--glow)}
.ctf-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;transition:border-color .2s,box-shadow .2s,transform .15s}
.ctf-card:hover{border-color:rgba(0,255,136,.3);box-shadow:0 6px 24px rgba(0,0,0,.5);transform:translateY(-2px)}
.ctf-card .card-header{background:var(--surface2);border-bottom:1px solid var(--border);font-family:var(--display);font-weight:700;font-size:1rem;letter-spacing:.5px}
.ch-card{cursor:pointer;position:relative;overflow:hidden}.ch-card::after{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--cat-c,var(--green));opacity:0;transition:opacity .2s}.ch-card:hover::after,.ch-card.solved::after{opacity:1}.ch-card.solved{border-color:rgba(0,255,136,.4);background:rgba(0,255,136,.03)}
.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:1.2rem 1.4rem;position:relative;overflow:hidden}
.stat-val{font-family:var(--mono);font-size:1.9rem;font-weight:700;color:var(--green);line-height:1.1}.stat-lbl{font-family:var(--display);font-size:.78rem;letter-spacing:1.2px;text-transform:uppercase;color:var(--muted);margin-top:3px}
.stat-icon{position:absolute;right:1rem;top:50%;transform:translateY(-50%);font-size:3rem;opacity:.06;color:var(--green)}
.ctf-table{color:var(--text);border-color:var(--border)}.ctf-table thead th{background:var(--surface2);color:var(--green);font-family:var(--display);font-weight:700;font-size:.8rem;letter-spacing:1px;text-transform:uppercase;border-color:var(--border)}.ctf-table tbody tr{border-color:var(--border);transition:background .12s}.ctf-table tbody tr:hover{background:rgba(0,255,136,.035)}.ctf-table td{vertical-align:middle;border-color:var(--border)}
.form-control,.form-select{background:var(--surface2)!important;border:1px solid var(--border)!important;color:var(--text)!important}.form-control:focus,.form-select:focus{border-color:var(--green)!important;box-shadow:0 0 0 3px rgba(0,255,136,.15)!important}
.form-label{font-family:var(--display);font-weight:600;font-size:.88rem;letter-spacing:.4px}.form-text{color:var(--muted)}
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem 1rem}
.auth-box{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:2.25rem;width:100%;max-width:430px;position:relative}
.auth-box::before{content:'';position:absolute;top:0;left:12%;right:12%;height:2px;background:linear-gradient(90deg,transparent,var(--green),transparent)}
.auth-title{text-align:center;font-family:var(--display);font-size:1.9rem;font-weight:800;color:var(--green);letter-spacing:2px;text-shadow:var(--glow);margin-bottom:1.5rem}
/* Admin layout */
.admin-wrap{display:flex;min-height:calc(100vh - 58px)}
.admin-side{width:230px;min-width:230px;background:var(--surface);border-right:1px solid var(--border);padding:.75rem 0;position:sticky;top:58px;height:calc(100vh - 58px);overflow-y:auto}
.side-link{display:flex;align-items:center;gap:8px;padding:.55rem 1.1rem;color:var(--text);text-decoration:none;font-family:var(--display);font-weight:600;font-size:.9rem;border-left:3px solid transparent;transition:all .14s}
.side-link:hover,.side-link.on{color:var(--green);background:rgba(0,255,136,.06);border-left-color:var(--green)}
.admin-body{flex:1;padding:1.5rem;overflow-x:hidden}
.badge-cat{font-family:var(--mono);font-size:.7rem;letter-spacing:.4px;padding:.25em .6em}
.alert{border-radius:7px}.alert-success{background:rgba(0,255,136,.07);border-color:rgba(0,255,136,.3);color:var(--green)}.alert-danger{background:rgba(255,68,85,.07);border-color:rgba(255,68,85,.3);color:#ff7788}.alert-warning{background:rgba(255,215,0,.07);border-color:rgba(255,215,0,.3);color:var(--yellow)}.alert-info{background:rgba(0,170,255,.07);border-color:rgba(0,170,255,.3);color:var(--blue)}
.modal-content{background:var(--surface);border:1px solid var(--border);color:var(--text)}.modal-header{border-bottom:1px solid var(--border);font-family:var(--display)}.modal-footer{border-top:1px solid var(--border)}.btn-close{filter:invert(1)}
.progress{background:var(--surface2);height:5px;border-radius:3px}.progress-bar{background:var(--green)}
.lb-1{color:var(--yellow)}.lb-2{color:#c0c0c0}.lb-3{color:#cd7f32}.lb-me{background:rgba(0,255,136,.05)!important}
.pg-title{font-family:var(--display);font-size:1.75rem;font-weight:800;color:#fff;letter-spacing:.5px}.pg-title .acc{color:var(--green)}
.mono{font-family:var(--mono)}.text-green{color:var(--green)!important}.bg-ctf{background:var(--surface)!important}.bdr-ctf{border-color:var(--border)!important}.flag-inp{font-family:var(--mono);letter-spacing:1px}
.ctf-footer{background:var(--surface);border-top:1px solid var(--border);position:relative;z-index:1}
.challenge-detail{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:2rem}
.challenge-desc{background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:1.25rem;white-space:pre-wrap;font-family:var(--body-font);line-height:1.8;color:var(--text)}
.file-download-btn{display:inline-flex;align-items:center;gap:8px;padding:.6rem 1.2rem;background:rgba(0,255,136,.08);border:1px solid rgba(0,255,136,.3);border-radius:8px;color:var(--green);text-decoration:none;font-family:var(--display);font-weight:600;transition:all .2s}
.file-download-btn:hover{background:rgba(0,255,136,.15);box-shadow:var(--glow);color:var(--green)}
/* Admin separate login badge */
.admin-login-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,68,85,.1);border:1px solid rgba(255,68,85,.3);color:#ff7788;padding:.3rem .8rem;border-radius:6px;font-size:.8rem;font-family:var(--display);font-weight:600}
@keyframes solveFlash{0%,100%{box-shadow:none}50%{box-shadow:0 0 28px rgba(0,255,136,.65)}}.solve-flash{animation:solveFlash .6s ease 2}
::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
@media(max-width:768px){.admin-side{display:none}.stat-val{font-size:1.4rem}}