/* ============================================================================
   CYBER ACADEMY — "OPERATOR" THEME
   Tactical SOC aesthetic: deep slate, phosphor-green + amber accents,
   monospace data type + clean sans for body. Dark default, light toggle.
   ============================================================================ */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700;800&family=Sora:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg:            #0a0e14;
  --bg-2:          #0f141d;
  --panel:         #121925;
  --panel-2:       #18212f;
  --line:          #232f42;
  --line-2:        #2d3b52;
  --text:          #d7e0ee;
  --text-dim:      #8593aa;
  --text-faint:    #5a6781;
  --green:         #3ddc84;   /* phosphor / success / "go" */
  --green-dim:     #1c7a48;
  --amber:         #ffb454;   /* warning / in-progress */
  --red:           #ff5c6c;   /* danger / weak */
  --blue:          #58a6ff;   /* info / links */
  --purple:        #b488ff;
  --grid:          rgba(61,220,132,0.045);
  --mono:          'JetBrains Mono', ui-monospace, monospace;
  --sans:          'Sora', system-ui, sans-serif;
  --radius:        10px;
  --shadow:        0 10px 40px -12px rgba(0,0,0,0.6);
}

[data-theme="light"] {
  --bg:#eef1f6; --bg-2:#e4e9f1; --panel:#fff; --panel-2:#f4f7fb;
  --line:#d7dfeb; --line-2:#c3cedd; --text:#142033; --text-dim:#566077;
  --text-faint:#8a94a8; --green:#0f9d58; --green-dim:#8fe3b5;
  --amber:#d98313; --red:#d83a4a; --blue:#2a6fd6; --grid:rgba(15,157,88,0.05);
  --shadow:0 10px 30px -14px rgba(20,40,80,0.25);
}

* { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }
body {
  font-family:var(--sans);
  background:var(--bg);
  color:var(--text);
  line-height:1.55;
  min-height:100vh;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size:32px 32px;
}
a { color:var(--blue); text-decoration:none; }
a:hover { text-decoration:underline; }

/* --------- layout shell --------- */
.shell { display:flex; min-height:100vh; }
.sidebar {
  width:248px; flex-shrink:0; background:var(--bg-2);
  border-right:1px solid var(--line); padding:20px 14px;
  position:sticky; top:0; height:100vh; overflow-y:auto;
}
.brand { display:flex; align-items:center; gap:10px; margin-bottom:6px; padding:0 8px; }
.brand .logo {
  width:34px; height:34px; border-radius:8px; flex-shrink:0;
  background:linear-gradient(135deg,var(--green),var(--green-dim));
  display:grid; place-items:center; font-family:var(--mono); font-weight:800;
  color:#08110b; font-size:18px; box-shadow:0 0 18px -2px var(--green);
}
.brand h1 { font-size:15px; font-weight:700; letter-spacing:.5px; line-height:1.1; }
.brand h1 span { display:block; font-family:var(--mono); font-size:9px; color:var(--text-faint); letter-spacing:2px; font-weight:500; }
.op-tag { font-family:var(--mono); font-size:10px; color:var(--text-faint); padding:4px 8px 14px; letter-spacing:1px; }

.nav-group { margin-top:16px; }
.nav-group .lbl { font-family:var(--mono); font-size:10px; letter-spacing:2px; color:var(--text-faint); padding:0 8px 8px; text-transform:uppercase; }
.nav a {
  display:flex; align-items:center; gap:10px; padding:9px 10px; border-radius:8px;
  color:var(--text-dim); font-size:13.5px; font-weight:500; margin-bottom:2px; transition:.15s;
}
.nav a:hover { background:var(--panel); color:var(--text); text-decoration:none; }
.nav a.active { background:var(--panel-2); color:var(--green); box-shadow:inset 2px 0 0 var(--green); }
.nav a .ic { width:16px; text-align:center; opacity:.85; }
.nav a .pct { margin-left:auto; font-family:var(--mono); font-size:10px; color:var(--text-faint); }

.main { flex:1; min-width:0; }
.topbar {
  height:58px; border-bottom:1px solid var(--line); background:var(--bg-2);
  display:flex; align-items:center; gap:16px; padding:0 24px; position:sticky; top:0; z-index:20;
}
.topbar .crumb { font-family:var(--mono); font-size:12px; color:var(--text-dim); letter-spacing:.5px; }
.topbar .spacer { flex:1; }
.hud { display:flex; align-items:center; gap:18px; }
.hud .stat { display:flex; align-items:center; gap:7px; font-family:var(--mono); font-size:12px; }
.hud .stat b { color:var(--green); }
.hud .stat .ic { font-size:13px; }
.streak-flame { color:var(--amber); }

.iconbtn { background:var(--panel); border:1px solid var(--line); color:var(--text-dim);
  width:34px; height:34px; border-radius:8px; cursor:pointer; font-size:14px; transition:.15s; }
.iconbtn:hover { color:var(--green); border-color:var(--line-2); }

.content { padding:28px 32px 64px; max-width:1180px; }

/* --------- typography helpers --------- */
.page-title { font-size:26px; font-weight:700; letter-spacing:-.3px; margin-bottom:4px; }
.page-sub { color:var(--text-dim); font-size:14px; margin-bottom:26px; }
.mono { font-family:var(--mono); }
.eyebrow { font-family:var(--mono); font-size:11px; letter-spacing:2px; color:var(--green); text-transform:uppercase; margin-bottom:8px; }
.section-title { font-size:18px; font-weight:600; margin:34px 0 16px; display:flex; align-items:center; gap:10px; }
.section-title::before { content:""; width:4px; height:18px; background:var(--green); border-radius:2px; }

/* --------- panels / cards --------- */
.panel { background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:20px; }
.grid { display:grid; gap:16px; }
.g2 { grid-template-columns:repeat(2,1fr); }
.g3 { grid-template-columns:repeat(3,1fr); }
.g4 { grid-template-columns:repeat(4,1fr); }

.stat-card { background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:18px; position:relative; overflow:hidden; }
.stat-card::after { content:""; position:absolute; top:0; right:0; width:60px; height:60px;
  background:radial-gradient(circle at top right, var(--grid), transparent 70%); }
.stat-card .k { font-family:var(--mono); font-size:11px; letter-spacing:1px; color:var(--text-faint); text-transform:uppercase; }
.stat-card .v { font-size:30px; font-weight:700; margin-top:6px; font-family:var(--mono); }
.stat-card .v.green { color:var(--green); }
.stat-card .v.amber { color:var(--amber); }
.stat-card .sub { font-size:12px; color:var(--text-dim); margin-top:2px; }

/* --------- cert tiles --------- */
.cert-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:16px; }
.cert-tile { background:var(--panel); border:1px solid var(--line); border-radius:var(--radius);
  padding:18px; cursor:pointer; transition:.18s; position:relative; overflow:hidden; display:block; }
.cert-tile:hover { transform:translateY(-3px); border-color:var(--line-2); box-shadow:var(--shadow); text-decoration:none; }
.cert-tile .bar { position:absolute; top:0; left:0; height:3px; width:100%; opacity:.9; }
.cert-tile .vendor { font-family:var(--mono); font-size:10px; letter-spacing:1.5px; color:var(--text-faint); text-transform:uppercase; }
.cert-tile .name { font-size:15px; font-weight:600; margin:8px 0 4px; color:var(--text); line-height:1.3; }
.cert-tile .code { font-family:var(--mono); font-size:11px; color:var(--text-dim); }
.cert-tile .track { font-size:11px; color:var(--text-faint); margin-top:8px; }
.cert-tile .foot { display:flex; align-items:center; justify-content:space-between; margin-top:14px; }
.diff { display:inline-flex; gap:3px; }
.diff i { width:7px; height:7px; border-radius:2px; background:var(--line-2); }
.diff i.on { background:var(--amber); }

/* --------- progress bars --------- */
.bar-track { background:var(--bg); border:1px solid var(--line); border-radius:99px; height:8px; overflow:hidden; }
.bar-fill { height:100%; border-radius:99px; background:linear-gradient(90deg,var(--green-dim),var(--green)); transition:width .5s; }
.bar-fill.amber { background:linear-gradient(90deg,#9a6512,var(--amber)); }
.bar-fill.red { background:linear-gradient(90deg,#8a2230,var(--red)); }
.bar-row { display:flex; align-items:center; gap:12px; margin:10px 0; }
.bar-row .lbl { flex:1; font-size:13px; }
.bar-row .num { font-family:var(--mono); font-size:12px; color:var(--text-dim); width:42px; text-align:right; }

/* ring */
.ring { --p:0; width:120px; height:120px; border-radius:50%;
  background:conic-gradient(var(--green) calc(var(--p)*1%), var(--line) 0);
  display:grid; place-items:center; position:relative; }
.ring::before { content:""; position:absolute; inset:10px; border-radius:50%; background:var(--panel); }
.ring .txt { position:relative; text-align:center; }
.ring .txt b { font-family:var(--mono); font-size:26px; font-weight:700; color:var(--green); }
.ring .txt small { display:block; font-size:10px; color:var(--text-faint); letter-spacing:1px; }

/* --------- buttons / pills --------- */
.btn { font-family:var(--sans); font-weight:600; font-size:13px; padding:9px 16px; border-radius:8px;
  border:1px solid var(--line-2); background:var(--panel-2); color:var(--text); cursor:pointer; transition:.15s; }
.btn:hover { border-color:var(--green); color:var(--green); }
.btn.primary { background:var(--green); color:#08110b; border-color:var(--green); }
.btn.primary:hover { background:#52e896; color:#08110b; }
.btn.sm { padding:6px 11px; font-size:12px; }
.btn.ghost { background:transparent; }
.pill { display:inline-block; font-family:var(--mono); font-size:10px; letter-spacing:1px; padding:3px 9px;
  border-radius:99px; border:1px solid var(--line-2); color:var(--text-dim); text-transform:uppercase; }
.pill.green { color:var(--green); border-color:var(--green-dim); }
.pill.amber { color:var(--amber); border-color:#7a5512; }
.pill.red { color:var(--red); border-color:#7a2230; }

/* --------- tabs --------- */
.tabs { display:flex; gap:4px; border-bottom:1px solid var(--line); margin-bottom:22px; flex-wrap:wrap; }
.tabs button { background:none; border:none; color:var(--text-dim); font-family:var(--sans); font-weight:500;
  font-size:13.5px; padding:11px 14px; cursor:pointer; border-bottom:2px solid transparent; transition:.15s; }
.tabs button:hover { color:var(--text); }
.tabs button.active { color:var(--green); border-bottom-color:var(--green); }

/* --------- lessons --------- */
.lesson { background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); margin-bottom:12px; overflow:hidden; }
.lesson summary { padding:16px 18px; cursor:pointer; display:flex; align-items:center; gap:12px; font-weight:600; font-size:14.5px; list-style:none; }
.lesson summary::-webkit-details-marker { display:none; }
.lesson summary .chk { width:20px; height:20px; border-radius:6px; border:1.5px solid var(--line-2); flex-shrink:0;
  display:grid; place-items:center; font-size:11px; color:transparent; }
.lesson.done summary .chk { background:var(--green); border-color:var(--green); color:#08110b; }
.lesson summary .caret { margin-left:auto; color:var(--text-faint); transition:.2s; font-family:var(--mono); }
.lesson[open] summary .caret { transform:rotate(90deg); }
.lesson .body { padding:4px 18px 20px; border-top:1px solid var(--line); }
.lesson .blk { margin-top:16px; }
.lesson .blk h4 { font-family:var(--mono); font-size:11px; letter-spacing:1.5px; color:var(--green); text-transform:uppercase; margin-bottom:6px; }
.lesson .blk p { font-size:13.5px; color:var(--text); line-height:1.65; }
.lesson .blk.visual { background:var(--bg); border:1px dashed var(--line-2); border-radius:8px; padding:14px; }
.lesson .blk.visual p { color:var(--text-dim); font-family:var(--mono); font-size:12.5px; }
.kc { background:var(--panel-2); border-left:3px solid var(--amber); border-radius:0 8px 8px 0; padding:12px 14px; margin-top:16px; }
.kc .q { font-size:13px; font-weight:600; }
.kc .a { font-size:13px; color:var(--green); margin-top:8px; display:none; }
.kc.show .a { display:block; }

/* --------- labs --------- */
.lab { background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:20px; margin-bottom:16px; }
.lab .lab-head { display:flex; align-items:flex-start; gap:12px; }
.lab h3 { font-size:16px; font-weight:600; }
.lab .objective { color:var(--text-dim); font-size:13.5px; margin:8px 0 14px; }
.lab .tools { display:flex; flex-wrap:wrap; gap:6px; margin-bottom:14px; }
.lab ol { margin:8px 0 14px 18px; }
.lab ol li { font-size:13px; margin-bottom:7px; font-family:var(--mono); color:var(--text); }
.lab .val { background:var(--bg); border-radius:8px; padding:12px 14px; }
.lab .val li { font-size:12.5px; color:var(--text-dim); margin-bottom:5px; list-style:none; padding-left:20px; position:relative; }
.lab .val li::before { content:"✓"; position:absolute; left:0; color:var(--green); }

/* --------- quiz --------- */
.quiz-q { background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:22px; margin-bottom:16px; }
.quiz-q .meta { display:flex; gap:8px; margin-bottom:12px; }
.quiz-q .q { font-size:15px; font-weight:600; margin-bottom:16px; }
.opt { display:block; width:100%; text-align:left; background:var(--panel-2); border:1px solid var(--line);
  border-radius:8px; padding:12px 14px; margin-bottom:9px; cursor:pointer; font-size:13.5px; color:var(--text); transition:.12s; font-family:var(--sans); }
.opt:hover { border-color:var(--line-2); }
.opt.correct { border-color:var(--green); background:rgba(61,220,132,.08); }
.opt.wrong { border-color:var(--red); background:rgba(255,92,108,.08); }
.opt.dim { opacity:.55; }
.explain { margin-top:12px; padding:14px; border-radius:8px; font-size:13px; display:none; }
.explain.show { display:block; }
.explain.ok { background:rgba(61,220,132,.07); border:1px solid var(--green-dim); }
.explain.no { background:rgba(255,92,108,.07); border:1px solid #7a2230; }
.explain b { color:var(--green); }
.explain.no b { color:var(--red); }

/* --------- flashcard --------- */
.flash-stage { display:grid; place-items:center; padding:20px 0; }
.flashcard { width:min(520px,100%); height:280px; perspective:1400px; cursor:pointer; }
.flash-inner { position:relative; width:100%; height:100%; transition:transform .5s; transform-style:preserve-3d; }
.flashcard.flipped .flash-inner { transform:rotateY(180deg); }
.flash-face { position:absolute; inset:0; backface-visibility:hidden; border-radius:14px; border:1px solid var(--line);
  background:var(--panel); display:grid; place-items:center; padding:32px; text-align:center; box-shadow:var(--shadow); }
.flash-face.back { transform:rotateY(180deg); background:var(--panel-2); }
.flash-face .cat { position:absolute; top:14px; left:16px; font-family:var(--mono); font-size:10px; letter-spacing:1px; color:var(--text-faint); }
.flash-face .txt { font-size:19px; font-weight:600; line-height:1.5; }
.flash-face.back .txt { font-size:15px; font-weight:400; color:var(--text); }
.flash-controls { display:flex; gap:10px; justify-content:center; margin-top:18px; }

/* --------- table --------- */
table.data { width:100%; border-collapse:collapse; font-size:13px; }
table.data th { text-align:left; font-family:var(--mono); font-size:10px; letter-spacing:1px; color:var(--text-faint);
  text-transform:uppercase; padding:10px 12px; border-bottom:1px solid var(--line); }
table.data td { padding:11px 12px; border-bottom:1px solid var(--line); color:var(--text-dim); }
table.data tr:hover td { color:var(--text); }

/* --------- planner --------- */
.plan-day { display:flex; gap:14px; padding:12px 0; border-bottom:1px solid var(--line); }
.plan-day .d { font-family:var(--mono); font-size:12px; color:var(--green); width:54px; flex-shrink:0; }
.plan-day .ph { width:90px; flex-shrink:0; }
.plan-day .tk { flex:1; font-size:13px; color:var(--text-dim); }
.plan-day .tk div { margin-bottom:3px; }

/* --------- badges --------- */
.badge-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(150px,1fr)); gap:14px; }
.badge { text-align:center; padding:18px 12px; border-radius:var(--radius); border:1px solid var(--line); background:var(--panel); opacity:.4; transition:.2s; }
.badge.earned { opacity:1; border-color:var(--green-dim); box-shadow:0 0 24px -8px var(--green); }
.badge .ic { font-size:30px; }
.badge .n { font-weight:600; font-size:13px; margin:8px 0 4px; }
.badge .d { font-size:11px; color:var(--text-faint); }

/* --------- toast --------- */
#toast-wrap { position:fixed; bottom:24px; right:24px; z-index:1000; display:flex; flex-direction:column; gap:10px; }
.toast { background:var(--panel-2); border:1px solid var(--green-dim); border-radius:10px; padding:13px 18px;
  box-shadow:var(--shadow); font-size:13px; animation:slideIn .3s ease; max-width:300px; }
.toast .t { font-weight:600; color:var(--green); display:flex; align-items:center; gap:8px; }
.toast .s { color:var(--text-dim); font-size:12px; margin-top:3px; }
@keyframes slideIn { from{ transform:translateX(120%); opacity:0; } to{ transform:translateX(0); opacity:1; } }

/* --------- mobile --------- */
.menu-toggle { display:none; }
@media (max-width:900px) {
  .sidebar { position:fixed; z-index:50; transform:translateX(-100%); transition:.25s; box-shadow:var(--shadow); }
  .sidebar.open { transform:translateX(0); }
  .menu-toggle { display:grid; }
  .g4 { grid-template-columns:repeat(2,1fr); }
  .g3 { grid-template-columns:1fr; }
  .g2 { grid-template-columns:1fr; }
  .content { padding:20px 16px 60px; }
  .hud .stat span.lbl { display:none; }
}
@media (max-width:560px){ .g4 { grid-template-columns:1fr 1fr; } }

.hidden { display:none !important; }
::-webkit-scrollbar { width:10px; height:10px; }
::-webkit-scrollbar-thumb { background:var(--line-2); border-radius:8px; }
::-webkit-scrollbar-track { background:transparent; }