:root{--bg-0:#020408;--bg-1:#060c14;--bg-2:#0a1220;--bg-3:#0f1a2e;--bg-card:rgba(15,26,46,.8);--b-1:rgba(255,255,255,.07);--b-2:rgba(255,255,255,.13);--t-0:#fff;--t-1:#c8d4e8;--t-2:#7a8fa8;--t-3:#3d5068;--neon:#00e896;--neon-a:rgba(0,232,150,.12);--blue:#4facfe;--orange:#ff8c42;--pink:#ff4f9b;--purple:#b47dff;--yellow:#ffd060;--sb-w:250px;--nav-h:56px;--r-md:14px;--r-lg:20px;--f-b:'Plus Jakarta Sans',sans-serif;--f-d:'Unbounded',sans-serif;--f-c:'JetBrains Mono',monospace}
[data-theme="light"]{--bg-0:#f0f4fa;--bg-1:#e8eef7;--bg-2:#dde4f0;--bg-3:#d0d9ec;--bg-card:rgba(255,255,255,.85);--b-1:rgba(0,0,0,.07);--b-2:rgba(0,0,0,.13);--t-0:#0a0e1a;--t-1:#1e2a3d;--t-2:#4a5a78;--t-3:#8294ae;--neon:#00a86b;--neon-a:rgba(0,168,107,.1)}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--f-b);background:var(--bg-0);color:var(--t-1);min-height:100vh;transition:background .3s,color .3s}
::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:var(--bg-1)}::-webkit-scrollbar-thumb{background:var(--b-2);border-radius:99px}
a{color:var(--neon);text-decoration:none}

/* SIDEBAR */
.sidebar{position:fixed;top:0;left:0;bottom:0;width:var(--sb-w);background:var(--bg-1);border-right:1px solid var(--b-1);display:flex;flex-direction:column;z-index:100;transition:transform .3s}
.sb-top{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--b-1)}
.sb-logo{display:flex;align-items:center;gap:9px;text-decoration:none}
.logo-mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--neon),#4facfe);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:900;color:#fff;font-family:var(--f-d);flex-shrink:0}
.sb-logo span{font-family:var(--f-d);font-size:14px;font-weight:700;color:var(--t-0)}
.sb-close{background:none;border:none;color:var(--t-3);cursor:pointer;font-size:16px;display:none}
.sb-nav{flex:1;overflow-y:auto;padding:12px 10px;display:flex;flex-direction:column;gap:3px}
.sb-link{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:10px;color:var(--t-2);font-size:13px;font-weight:600;text-decoration:none;transition:all .15s}
.sb-link:hover{background:var(--bg-3);color:var(--t-0)}
.sb-link.active{background:var(--neon-a);color:var(--neon)}
.sb-admin{margin-top:8px;border-top:1px solid var(--b-1);padding-top:12px}
.sb-user{padding:14px 16px;border-top:1px solid var(--b-1);display:flex;align-items:center;gap:10px}
.sb-avatar{width:36px;height:36px;border-radius:50%;object-fit:cover;flex-shrink:0;border:2px solid var(--b-1)}
.sb-name{font-size:13px;font-weight:700;color:var(--t-0);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:120px}
.sb-xp{font-family:var(--f-c);font-size:11px;color:var(--neon)}
.sb-logout{margin-left:auto;background:none;border:none;color:var(--t-3);cursor:pointer;font-size:17px;text-decoration:none;transition:color .2s}
.sb-logout:hover{color:#ff5f5f}

/* MAIN WRAP */
.dash-wrap{margin-left:var(--sb-w);min-height:100vh;display:flex;flex-direction:column}
.no-sidebar{margin-left:0}

/* TOPBAR */
.topbar{position:sticky;top:0;z-index:50;height:var(--nav-h);display:flex;align-items:center;gap:14px;padding:0 24px;background:rgba(2,4,8,.9);backdrop-filter:blur(16px);border-bottom:1px solid var(--b-1)}
[data-theme="light"] .topbar{background:rgba(240,244,250,.9)}
.menu-btn{background:none;border:none;color:var(--t-2);cursor:pointer;font-size:19px;display:none;padding:4px 6px}
.topbar-title{font-family:var(--f-d);font-size:15px;font-weight:700;color:var(--t-0);flex:1}
.topbar-right{display:flex;align-items:center;gap:10px}
.theme-btn{background:var(--bg-3);border:1px solid var(--b-1);border-radius:9px;width:34px;height:34px;cursor:pointer;font-size:16px;transition:all .2s;color:var(--t-2)}
.theme-btn:hover{border-color:var(--b-2)}

/* BUTTONS */
.btn-primary{background:var(--neon);color:#0a0e1a;border:none;border-radius:10px;padding:10px 20px;font-size:13px;font-weight:800;font-family:var(--f-b);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:7px;transition:all .2s}
.btn-primary:hover{box-shadow:0 0 20px rgba(0,232,150,.35);transform:translateY(-1px)}
.btn-primary.btn-sm{padding:7px 14px;font-size:12px}
.btn-ghost{background:transparent;color:var(--t-1);border:1px solid var(--b-2);border-radius:10px;padding:9px 18px;font-size:13px;font-weight:600;font-family:var(--f-b);cursor:pointer;text-decoration:none;transition:all .2s}
.btn-ghost:hover{border-color:var(--b-3);color:var(--t-0)}
.btn-ghost.btn-sm{padding:6px 12px;font-size:12px}

/* DASH MAIN */
.dash-main{flex:1;padding:28px 28px 48px;max-width:1080px;width:100%}

/* STAT CARDS */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}
.stat-card{background:var(--bg-card);border:1px solid var(--b-1);border-radius:var(--r-lg);padding:22px 18px;backdrop-filter:blur(12px);position:relative;overflow:hidden}
.stat-card::after{content:'';position:absolute;top:-30px;right:-30px;width:90px;height:90px;border-radius:50%;opacity:.15;pointer-events:none}
.sc-green::after{background:var(--neon)}.sc-blue::after{background:var(--blue)}.sc-orange::after{background:var(--orange)}.sc-purple::after{background:var(--purple)}
.sc-icon{font-size:22px;margin-bottom:10px}
.sc-num{font-family:var(--f-d);font-size:32px;font-weight:900;line-height:1;color:var(--t-0);margin-bottom:5px}
.sc-lbl{font-size:12px;font-weight:700;color:var(--t-2)}
.sc-sub{font-size:10px;color:var(--t-3);margin-top:3px;font-family:var(--f-c)}

/* DASH CARD */
.dash-card{background:var(--bg-card);border:1px solid var(--b-1);border-radius:var(--r-lg);padding:24px;margin-bottom:18px;backdrop-filter:blur(12px)}
.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.card-head h2{font-family:var(--f-d);font-size:16px;font-weight:900;color:var(--t-0)}
.card-sub{font-family:var(--f-c);font-size:11px;color:var(--t-3)}
.card-link{font-size:12px;font-weight:600;color:var(--neon)}

/* CALENDAR */
.calendar-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:3px;margin-bottom:10px}
.cal-sq{width:100%;aspect-ratio:1;border-radius:3px}
.cal-sq.lv0{background:var(--b-1)}
.cal-sq.lv1{background:rgba(0,232,150,.2)}
.cal-sq.lv2{background:rgba(0,232,150,.5)}
.cal-sq.lv3{background:var(--neon)}
.cal-legend{display:flex;align-items:center;gap:5px;font-size:11px;color:var(--t-3);justify-content:flex-end}
.cal-legend .cal-sq{width:13px;height:13px;flex-shrink:0}

/* PROGRESS */
.progress-list{display:flex;flex-direction:column;gap:10px}
.prog-row{display:flex;align-items:center;gap:14px;padding:12px 14px;border-radius:12px;background:var(--bg-2);border:1px solid var(--b-1);text-decoration:none;transition:all .2s}
.prog-row:hover{border-color:var(--b-2);transform:translateX(3px)}
.prog-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.prog-info{flex:1}
.prog-name{font-size:13px;font-weight:700;color:var(--t-0);margin-bottom:6px}
.prog-bar-wrap{display:flex;align-items:center;gap:8px}
.prog-bar-bg{flex:1;height:4px;background:var(--b-1);border-radius:99px;overflow:hidden}
.prog-bar-fill{height:100%;border-radius:99px;transition:width .8s}
.prog-pct{font-family:var(--f-c);font-size:10px;color:var(--t-3);width:28px;text-align:right}
.prog-done{font-family:var(--f-c);font-size:12px;font-weight:700;flex-shrink:0}
.prog-badge{background:var(--neon);color:#0a0e1a;font-size:10px;font-weight:700;padding:3px 7px;border-radius:99px;flex-shrink:0}

/* CERTIFICATES */
.cert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.cert-card{background:var(--bg-2);border:1px solid var(--b-1);border-radius:var(--r-lg);padding:20px;display:flex;flex-direction:column;gap:12px;transition:all .2s}
.cert-card:hover{border-color:rgba(0,232,150,.3);transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,0,0,.3)}
.cert-icon{font-size:32px}
.cert-info{flex:1}
.cert-course{font-family:var(--f-d);font-size:14px;font-weight:700;color:var(--t-0);margin-bottom:4px}
.cert-uid{font-family:var(--f-c);font-size:10px;color:var(--t-3)}
.cert-date{font-size:11px;color:var(--t-3);margin-top:3px}
.cert-name-row{display:flex;align-items:center;gap:8px;margin-top:8px;flex-wrap:wrap}
.cert-name{font-size:12px;font-weight:600;color:var(--neon)}
.edit-name-btn{background:none;border:none;font-size:11px;color:var(--t-3);cursor:pointer;padding:2px 6px;border-radius:5px;transition:all .15s}
.edit-name-btn:hover{color:var(--t-0);background:var(--bg-3)}
.cert-actions{display:flex;gap:8px}
.btn-cert-view,.btn-cert-dl{flex:1;padding:8px 12px;border-radius:9px;font-size:12px;font-weight:700;font-family:var(--f-b);cursor:pointer;transition:all .2s;border:1px solid var(--b-1)}
.btn-cert-view{background:var(--bg-3);color:var(--t-1)}
.btn-cert-view:hover{border-color:var(--b-2);color:var(--t-0)}
.btn-cert-dl{background:var(--neon);color:#0a0e1a;border-color:var(--neon)}
.btn-cert-dl:hover{box-shadow:0 0 14px rgba(0,232,150,.4)}

/* MODALS */
.modal-overlay{position:fixed;inset:0;z-index:500;background:rgba(0,0,0,.8);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;padding:20px}
.cert-modal{background:var(--bg-2);border:1px solid var(--b-2);border-radius:24px;overflow:hidden;max-width:740px;width:100%;box-shadow:0 24px 80px rgba(0,0,0,.6)}
.cert-modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 22px;border-bottom:1px solid var(--b-1);font-weight:700;font-size:15px;color:var(--t-0)}
.cert-modal-head button{background:var(--bg-3);border:1px solid var(--b-1);border-radius:8px;padding:5px 12px;color:var(--t-2);cursor:pointer;font-size:13px}
.cert-modal-body{padding:24px;display:flex;flex-direction:column;gap:16px}
#certCanvas{width:100%;border-radius:12px;display:block;border:1px solid var(--b-1)}
.cert-name-edit label{font-size:12px;font-weight:700;color:var(--t-2)}
.cert-name-input{background:var(--bg-3);border:1px solid var(--b-1);border-radius:10px;padding:10px 14px;color:var(--t-0);font-family:var(--f-b);font-size:14px;outline:none;width:100%;transition:border-color .2s}
.cert-name-input:focus{border-color:var(--neon)}
.btn-update-name{background:var(--bg-3);border:1px solid var(--b-1);border-radius:10px;padding:10px 16px;color:var(--t-1);font-size:13px;font-weight:700;cursor:pointer;transition:all .2s;white-space:nowrap}
.btn-update-name:hover{border-color:var(--neon);color:var(--neon)}
.btn-dl-cert{background:var(--neon);color:#0a0e1a;border:none;border-radius:12px;padding:12px;font-size:14px;font-weight:800;font-family:var(--f-b);cursor:pointer;transition:all .2s;width:100%}
.btn-dl-cert:hover{box-shadow:0 0 22px rgba(0,232,150,.4);transform:translateY(-1px)}
.edit-modal{background:var(--bg-2);border:1px solid var(--b-2);border-radius:20px;overflow:hidden;max-width:420px;width:100%;box-shadow:0 24px 80px rgba(0,0,0,.5)}
.edit-modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 22px;border-bottom:1px solid var(--b-1);font-weight:700;color:var(--t-0)}
.edit-modal-head button{background:var(--bg-3);border:1px solid var(--b-1);border-radius:7px;padding:4px 10px;color:var(--t-2);cursor:pointer;font-size:12px}
.edit-modal-body{padding:22px;display:flex;flex-direction:column;gap:12px}
.edit-modal-body p{font-size:13px;color:var(--t-2)}

/* LEADERBOARD */
.lb-table{display:flex;flex-direction:column;gap:8px}
.lb-row{display:flex;align-items:center;gap:14px;padding:14px 16px;background:var(--bg-2);border:1px solid var(--b-1);border-radius:12px;transition:all .2s}
.lb-row:hover{border-color:var(--b-2);transform:translateX(3px)}
.lb-me{border-color:rgba(0,232,150,.3)!important;background:rgba(0,232,150,.05)!important}
.lb-rank{width:36px;font-family:var(--f-d);font-size:16px;font-weight:900;text-align:center;flex-shrink:0}
.lb-rank.gold{color:var(--yellow)}.lb-rank.silver{color:#c0c0c0}.lb-rank.bronze{color:#cd7f32}
.lb-avatar{width:38px;height:38px;border-radius:50%;object-fit:cover;flex-shrink:0;border:2px solid var(--b-1)}
.lb-info{flex:1}
.lb-name{font-size:14px;font-weight:700;color:var(--t-0);display:flex;align-items:center;gap:7px}
.lb-meta{font-family:var(--f-c);font-size:11px;color:var(--t-3);margin-top:2px}
.lb-xp{font-family:var(--f-c);font-size:16px;font-weight:700;color:var(--neon)}
.lb-xp span{font-size:11px;color:var(--t-3)}
.you-tag{background:var(--neon-a);color:var(--neon);font-size:10px;padding:2px 7px;border-radius:99px;font-family:var(--f-c)}

/* PROFILE */
.profile-card .profile-avatar-section{display:flex;align-items:center;gap:20px;margin-bottom:28px;padding-bottom:24px;border-bottom:1px solid var(--b-1)}
.profile-avatar{width:80px;height:80px;border-radius:50%;object-fit:cover;border:3px solid var(--b-2);flex-shrink:0}
.profile-name{font-family:var(--f-d);font-size:18px;font-weight:900;color:var(--t-0)}
.profile-email{font-size:13px;color:var(--t-2);margin-top:4px}
.profile-since{font-size:11px;color:var(--t-3);margin-top:4px;font-family:var(--f-c)}
.profile-form{display:flex;flex-direction:column;gap:18px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:12px;font-weight:700;color:var(--t-1);letter-spacing:.03em}
.field input,.field textarea{background:var(--bg-2);border:1px solid var(--b-1);border-radius:10px;padding:11px 14px;color:var(--t-0);font-family:var(--f-b);font-size:14px;outline:none;transition:border-color .2s;width:100%}
.field input:focus,.field textarea:focus{border-color:var(--neon)}
.field input:disabled{opacity:.5;cursor:not-allowed}
.field-hint{font-size:11px;color:var(--t-3)}
.alert{padding:12px 16px;border-radius:10px;font-size:13px;margin-bottom:8px}
.alert-err{background:rgba(255,80,80,.08);border:1px solid rgba(255,80,80,.25);color:#ff6b6b}
.alert-ok{background:var(--neon-a);border:1px solid rgba(0,232,150,.25);color:var(--neon)}

/* WELCOME BANNER */
.welcome-banner{background:linear-gradient(135deg,rgba(0,232,150,.15),rgba(79,172,254,.1));border:1px solid rgba(0,232,150,.25);border-radius:14px;padding:16px 20px;margin-bottom:20px;display:flex;align-items:center;justify-content:space-between;font-size:14px;color:var(--t-0)}
.welcome-banner button{background:none;border:none;color:var(--t-3);cursor:pointer;font-size:16px}

/* RESPONSIVE */
@media(max-width:900px){
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .sb-close{display:block}
  .dash-wrap{margin-left:0}
  .menu-btn{display:block}
  .calendar-grid{grid-template-columns:repeat(7,1fr)}
}
@media(max-width:520px){
  .stat-grid{grid-template-columns:1fr 1fr}
  .dash-main{padding:16px 14px 40px}
  .cert-grid{grid-template-columns:1fr}
}