:root{
  --bg:#0a0e14;
  --surface:#121a24;
  --surface-raised:#182231;
  --line:rgba(255,255,255,.09);
  --text:#eef2f6;
  --text-dim:#8b96a6;
  --ok:#5ec98f;
  --bad:#e8635f;
  --radius:16px;
  --font-display:'Space Grotesk','IBM Plex Sans Arabic',sans-serif;
  --font-body:'IBM Plex Sans Arabic','Space Grotesk',sans-serif;
  --font-mono:'JetBrains Mono',monospace;
}
html[data-theme="light"]{
  --bg:#f4f6f9;
  --surface:#ffffff;
  --surface-raised:#eef1f6;
  --line:rgba(10,14,20,.10);
  --text:#131a24;
  --text-dim:#5a6576;
}
html[data-theme="light"] body{
  background:
    radial-gradient(1100px 500px at 15% -10%, rgba(110,198,255,.14), transparent 60%),
    radial-gradient(900px 500px at 85% 0%, rgba(185,140,255,.14), transparent 60%),
    var(--bg);
}
html[data-theme="light"] .lang-toggle button.active{color:#fff;}
html[data-theme="light"] .video-wrap{background:#000;}
html[data-theme="light"] .playground-output{background:#0a0e14;}
*{box-sizing:border-box; margin:0; padding:0;}
html,body{height:100%;}
body{
  background:
    radial-gradient(1100px 500px at 15% -10%, rgba(110,198,255,.10), transparent 60%),
    radial-gradient(900px 500px at 85% 0%, rgba(185,140,255,.10), transparent 60%),
    var(--bg);
  color:var(--text);
  font-family:var(--font-body);
}
.mono{font-family:var(--font-mono);}
.page{max-width:1120px; margin:0 auto; padding:0 16px 100px;}

/* HEADER */
.header{display:flex; align-items:center; justify-content:space-between; padding:20px 0; gap:10px; flex-wrap:wrap;}
.header-controls{display:flex; align-items:center; gap:10px;}
.brand{display:flex; align-items:center; gap:10px; font-family:var(--font-display); font-weight:700; font-size:19px; cursor:pointer;}
.brand-mark{font-family:var(--font-mono); color:#6EC6FF;}
.lang-toggle{display:flex; border:1px solid var(--line); border-radius:999px; overflow:hidden; font-family:var(--font-mono); font-size:13px;}
.lang-toggle button{background:none; border:none; color:var(--text-dim); padding:8px 18px; cursor:pointer; transition:.2s;}
.lang-toggle button.active{background:var(--text); color:var(--bg); font-weight:700;}
.theme-toggle{width:38px; height:38px; border-radius:50%; border:1px solid var(--line); background:none; color:var(--text); cursor:pointer; display:flex; align-items:center; justify-content:center; font-size:16px; transition:.2s;}
.theme-toggle:hover{border-color:#6EC6FF;}

/* HERO */
.hero{text-align:center; padding:40px 0 48px; max-width:680px; margin:0 auto;}
.eyebrow{display:inline-flex; align-items:center; gap:8px; font-family:var(--font-mono); font-size:13px; color:#6EC6FF; letter-spacing:.06em; margin-bottom:18px;}
.eyebrow::before{content:""; width:7px; height:7px; border-radius:50%; background:#6EC6FF; box-shadow:0 0 10px #6EC6FF;}
.hero h1{font-family:var(--font-display); font-size:38px; font-weight:700; line-height:1.25; margin-bottom:16px; background:linear-gradient(90deg, var(--text) 30%, #6EC6FF 75%, #B98CFF 100%); -webkit-background-clip:text; background-clip:text; color:transparent;}
.subtitle{color:var(--text-dim); font-size:16px; line-height:1.7;}

/* CONTINUE BANNER */
.continue-banner{display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:18px 22px; margin:0 0 28px; max-width:680px; margin-left:auto; margin-right:auto;}
.continue-banner .cb-info{display:flex; align-items:center; gap:12px;}
.continue-banner .cb-glyph{font-family:var(--font-mono); font-weight:700; font-size:20px; width:42px; height:42px; border-radius:11px; display:flex; align-items:center; justify-content:center; background:var(--surface-raised); flex-shrink:0;}
.continue-banner .cb-text{text-align:start;}
.continue-banner .cb-title{font-size:13px; color:var(--text-dim); margin-bottom:2px;}
.continue-banner .cb-track{font-family:var(--font-display); font-weight:700; font-size:15.5px;}
.continue-banner button{flex-shrink:0; background:#6EC6FF; color:#08131c; border:none; font-weight:700; padding:10px 20px; border-radius:9px; cursor:pointer; font-size:13.5px;}
@media (max-width:480px){.continue-banner{flex-direction:column; align-items:stretch; text-align:center;} .continue-banner .cb-info{justify-content:center;} .continue-banner .cb-text{text-align:center;} .continue-banner button{width:100%;}}

/* TRACKS GRID */
.tracks-grid{position:relative; display:grid; grid-template-columns:repeat(auto-fit, minmax(240px,1fr)); gap:20px; padding-top:24px;}
.tracks-grid::before{content:""; position:absolute; top:0; left:8%; right:8%; height:1px; background-image:linear-gradient(90deg, transparent, var(--line) 15%, var(--line) 85%, transparent); background-size:14px 1px;}
@media (max-width:860px){.tracks-grid{grid-template-columns:1fr;} .tracks-grid::before{display:none;} .hero h1{font-size:28px;}}
@media (max-width:480px){.hero{padding:28px 0 36px;} .hero h1{font-size:24px;} .subtitle{font-size:14.5px;}}

.track-card{position:relative; background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:24px 22px 22px; display:flex; flex-direction:column; transition:border-color .2s, transform .2s, box-shadow .25s; animation:cardIn .5s ease backwards; animation-delay:calc(var(--stagger, 0) * .08s);}
.track-card::before{content:""; position:absolute; top:-1px; left:50%; transform:translateX(-50%); width:10px; height:10px; border-radius:50%; background:var(--accent); box-shadow:0 0 0 4px var(--bg), 0 0 14px var(--accent);}
.track-card:hover{border-color:var(--accent); transform:translateY(-4px); box-shadow:0 14px 32px -14px var(--accent);}
@keyframes cardIn{from{opacity:0; transform:translateY(14px);} to{opacity:1; transform:translateY(0);}}
@media (prefers-reduced-motion: reduce){.track-card{animation:none;}}
.track-glyph{font-family:var(--font-mono); font-weight:700; font-size:24px; color:var(--accent); margin-bottom:16px;}
.track-card h3{font-family:var(--font-display); font-size:20px; font-weight:700; margin-bottom:10px;}
.track-desc{color:var(--text-dim); font-size:14.5px; line-height:1.75; margin-bottom:22px; min-height:74px;}
.track-progress-row{display:flex; justify-content:space-between; align-items:center; font-size:12.5px; margin-bottom:10px; color:var(--text-dim);}
.track-progress-value{color:var(--text);}
.progress-bar{height:6px; background:var(--surface-raised); border-radius:99px; overflow:hidden; margin-bottom:24px;}
.progress-fill{height:100%; background:var(--accent); border-radius:99px; transition:width .3s;}
.track-cta{margin-top:auto; display:inline-flex; align-items:center; justify-content:center; gap:8px; background:transparent; border:1px solid var(--line); color:var(--text); font-family:var(--font-body); font-weight:600; font-size:14.5px; padding:12px 18px; border-radius:10px; cursor:pointer; transition:.18s;}
.track-cta:active, .btn-submit:active, .btn-run:active, .btn-next:active{transform:scale(.96);}
.track-card:hover .track-cta{border-color:var(--accent); color:var(--accent);}
.track-cta .arrow{transition:transform .18s;}
html[dir="rtl"] .track-cta .arrow{transform:scaleX(-1);}
.track-card:hover .track-cta .arrow{transform:translateX(3px);}
html[dir="rtl"] .track-card:hover .track-cta .arrow{transform:scaleX(-1) translateX(3px);}

/* TRACK / LESSON VIEW LAYOUT */
.back-link{background:none; border:none; color:var(--text-dim); font-family:var(--font-mono); font-size:13px; cursor:pointer; margin-bottom:20px; display:inline-flex; align-items:center; gap:6px;}
.back-link:hover{color:var(--text);}
.track-header{display:flex; align-items:center; gap:14px; margin-bottom:24px;}
.track-header .glyph{font-family:var(--font-mono); font-weight:700; font-size:26px;}
.track-header h2{font-family:var(--font-display); font-size:24px; font-weight:700;}

.lesson-layout{display:grid; grid-template-columns:260px 1fr; gap:24px; align-items:start;}
@media (max-width:860px){
  .lesson-layout{grid-template-columns:1fr;}
  .lesson-sidebar{max-height:280px; overflow-y:auto;}
}

.sidebar-search{display:flex; align-items:center; gap:8px; background:var(--surface-raised); border:1px solid var(--line); border-radius:9px; padding:8px 10px; margin-bottom:6px;}
.sidebar-search input{flex:1; background:none; border:none; outline:none; color:var(--text); font-family:var(--font-body); font-size:13px; min-width:0;}
.sidebar-search input::placeholder{color:var(--text-dim);}
.lesson-side-item.search-hidden{display:none;}

.lesson-sidebar{background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:10px; display:flex; flex-direction:column; gap:4px;}
.lesson-side-item{display:flex; align-items:center; gap:10px; padding:11px 12px; border-radius:10px; cursor:pointer; font-size:13.5px; transition:.15s;}
.lesson-side-item:hover{background:var(--surface-raised);}
.lesson-side-item.active{background:var(--surface-raised); border:1px solid var(--accent);}
.lesson-side-item.locked{opacity:.4; cursor:not-allowed;}
.lesson-side-num{width:22px; height:22px; border-radius:50%; border:1px solid var(--line); display:flex; align-items:center; justify-content:center; font-family:var(--font-mono); font-size:11px; flex-shrink:0;}
.lesson-side-item.done .lesson-side-num{background:var(--ok); border-color:var(--ok); color:#08150e;}
.lesson-side-item.exam-item{margin-top:6px; border-top:1px dashed var(--line); padding-top:16px;}

.lesson-main{background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:24px;}
@media (max-width:600px){.lesson-main{padding:16px;} .lesson-title{font-size:17px;}}
.lesson-title{font-family:var(--font-display); font-size:20px; font-weight:700; margin-bottom:16px;}
.video-lang-toggle{display:flex; align-items:center; gap:8px; margin-bottom:12px; font-size:13px; color:var(--text-dim); flex-wrap:wrap;}
.vlang-btn{background:none; border:1px solid var(--line); color:var(--text-dim); padding:6px 14px; border-radius:999px; cursor:pointer; font-size:12.5px; font-family:var(--font-mono);}
.vlang-btn.active{background:#6EC6FF; border-color:#6EC6FF; color:#08131c; font-weight:700;}

.video-wrap{position:relative; padding-top:56.25%; border-radius:12px; overflow:hidden; border:1px solid var(--line); margin-bottom:20px; background:#000;}
.video-wrap iframe{position:absolute; inset:0; width:100%; height:100%; border:0;}

.playground{background:var(--surface-raised); border:1px solid var(--line); border-radius:12px; padding:16px; margin-bottom:20px;}
.playground h4{font-size:14px; margin-bottom:10px; color:var(--text-dim); font-weight:600;}
.playground textarea{width:100%; min-height:120px; background:var(--bg); color:var(--text); border:1px solid var(--line); border-radius:8px; padding:12px; font-family:var(--font-mono); font-size:13px; resize:vertical; direction:ltr; text-align:left;}
.playground-actions{display:flex; gap:10px; margin-top:10px; align-items:center; flex-wrap:wrap;}
.btn-run{background:#6EC6FF; color:#08131c; border:none; font-weight:700; padding:9px 18px; border-radius:8px; cursor:pointer; font-size:13.5px;}
.btn-link{color:var(--text-dim); font-size:13px; text-decoration:none; border-bottom:1px dashed var(--text-dim);}
.playground-output{margin-top:10px; background:#000; border-radius:8px; padding:10px 12px; font-family:var(--font-mono); font-size:13px; min-height:20px; direction:ltr; text-align:left; white-space:pre-wrap; color:#5ec98f;}
.playground-output.err{color:var(--bad);}

.quiz-box{background:var(--surface-raised); border:1px solid var(--line); border-radius:12px; padding:20px;}
.quiz-box h4{font-size:15px; margin-bottom:14px;}
.quiz-option{display:flex; align-items:center; gap:10px; padding:11px 14px; border:1px solid var(--line); border-radius:9px; margin-bottom:8px; cursor:pointer; font-size:14px; transition:.15s;}
.quiz-option:hover{border-color:var(--accent, #6EC6FF);}
.quiz-option:focus-visible{outline:2px solid #6EC6FF; outline-offset:2px;}
.quiz-option.selected{border-color:#6EC6FF; background:rgba(110,198,255,.08);}
.quiz-option.correct{border-color:var(--ok); background:rgba(94,201,143,.1);}
.quiz-option.wrong{border-color:var(--bad); background:rgba(232,99,95,.1);}
.btn-submit{margin-top:8px; background:#6EC6FF; color:#08131c; border:none; font-weight:700; padding:10px 20px; border-radius:8px; cursor:pointer; font-size:13.5px;}
.btn-submit:disabled{opacity:.4; cursor:not-allowed;}
.quiz-feedback{margin-top:12px; font-size:13.5px; padding:10px 12px; border-radius:8px;}
.quiz-feedback.ok{background:rgba(94,201,143,.12); color:var(--ok);}
.quiz-feedback.bad{background:rgba(232,99,95,.12); color:var(--bad);}
.points-earned{font-weight:700; animation:pointsPop .35s ease;}
@keyframes pointsPop{ 0%{ transform:scale(.85); opacity:0; } 60%{ transform:scale(1.05); opacity:1; } 100%{ transform:scale(1); } }
.btn-next{margin-top:12px; background:var(--ok); color:#08150e; border:none; font-weight:700; padding:10px 20px; border-radius:8px; cursor:pointer; font-size:13.5px;}

/* FINAL EXAM */
.exam-question{margin-bottom:22px; padding-bottom:18px; border-bottom:1px solid var(--line);}
.exam-question:last-child{border-bottom:none;}
.exam-score{text-align:center; padding:30px 0;}
.exam-score .big-num{font-family:var(--font-display); font-size:48px; font-weight:700;}

/* CERTIFICATE */
.cert-wrap{max-width:640px; margin:0 auto;}
.cert-form{background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:26px; margin-bottom:20px;}
.cert-form input{width:100%; padding:12px 14px; background:var(--bg); border:1px solid var(--line); border-radius:8px; color:var(--text); font-family:var(--font-body); font-size:14.5px; margin:10px 0;}
.certificate{background:linear-gradient(160deg, #182231, #0f1620); border:2px solid #6EC6FF; border-radius:18px; padding:48px 32px; text-align:center; position:relative; box-shadow:0 20px 60px -20px rgba(110,198,255,.35);}
.certificate::before{content:"EASY CODE"; position:absolute; top:16px; left:50%; transform:translateX(-50%); font-family:var(--font-mono); font-size:11px; letter-spacing:.2em; color:var(--text-dim);}
.cert-name{font-family:var(--font-display); font-size:30px; font-weight:700; margin:18px 0 6px; color:#6EC6FF;}
.cert-line{color:var(--text-dim); font-size:14px; margin-bottom:6px;}
.cert-track{font-size:20px; font-weight:700; margin:14px 0;}
.cert-date{font-family:var(--font-mono); font-size:12px; color:var(--text-dim); margin-top:20px;}

@media print{
  .header, .back-link, .lesson-sidebar, .cert-form, .share-row{display:none !important;}
  body{background:#fff; color:#000;}
}

/* RESOURCES */
.resources-box{display:flex; gap:10px; flex-wrap:wrap; margin:0 0 20px;}
.resource-link{display:inline-flex; align-items:center; gap:7px; background:var(--surface-raised); border:1px solid var(--line); border-radius:9px; padding:9px 14px; font-size:13px; color:var(--text); text-decoration:none; transition:.15s;}
.resource-link:hover{border-color:#6EC6FF; color:#6EC6FF;}

/* NOTES */
.notes-box{margin:20px 0; background:var(--surface-raised); border:1px solid var(--line); border-radius:12px; padding:16px;}
.notes-box h4{font-size:14px; margin-bottom:10px; color:var(--text-dim); font-weight:600;}
.notes-box textarea{width:100%; min-height:80px; background:var(--bg); color:var(--text); border:1px solid var(--line); border-radius:8px; padding:10px 12px; font-family:var(--font-body); font-size:13.5px; resize:vertical;}
.notes-saved{font-size:11.5px; color:var(--ok); margin-top:6px; height:14px;}

/* SHARE */
.share-row{display:flex; gap:10px; flex-wrap:wrap; justify-content:center; margin-top:14px;}
.share-btn{display:inline-flex; align-items:center; gap:7px; border:1px solid var(--line); background:var(--surface-raised); color:var(--text); padding:9px 16px; border-radius:9px; cursor:pointer; font-size:13px; font-family:var(--font-body); text-decoration:none;}
.share-btn:hover{border-color:#6EC6FF; color:#6EC6FF;}

/* CONFETTI */
#confettiCanvas{position:fixed; inset:0; width:100%; height:100%; pointer-events:none; z-index:999;}

@media (max-width:480px){
  .track-cta, .btn-submit, .btn-next{width:100%;}
  .quiz-option{font-size:13.5px;}
}

/* FOOTER */
.site-footer{
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  margin-top:48px; padding:20px 4px; border-top:1px solid var(--line);
  color:var(--text-dim); font-size:13px; flex-wrap:wrap;
}
.footer-brand{font-family:var(--font-display); font-weight:600; color:var(--text);}
.footer-social{display:inline-flex; align-items:center; gap:7px; color:var(--text-dim); text-decoration:none; transition:.18s;}
.footer-social:hover{color:#E1306C;}
.footer-about-btn{background:none; border:none; font-family:var(--font-body); font-size:13px; cursor:pointer; padding:0;}
.footer-about-btn:hover{color:var(--text);}
.footer-visits{margin-inline-start:auto; font-family:var(--font-mono); font-size:12px;}
@media print{ .site-footer{display:none !important;} }

/* STATS STRIP */
.stats-strip{display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin-bottom:24px;}
.stat-pill{background:var(--surface); border:1px solid var(--line); border-radius:12px; padding:12px 20px; text-align:center; min-width:100px;}
.stat-pill .stat-num{display:block; font-family:var(--font-display); font-weight:700; font-size:19px; color:#6EC6FF;}
.stat-pill .stat-label{display:block; font-size:11.5px; color:var(--text-dim); margin-top:2px;}

/* LEADERBOARD */
.leaderboard-box{max-width:520px; margin:32px auto 0; background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:20px;}
.leaderboard-box h4{font-family:var(--font-display); font-size:16px; margin-bottom:14px; text-align:center;}
.leaderboard-row{display:flex; align-items:center; gap:10px; padding:9px 4px; border-bottom:1px solid var(--line); font-size:13.5px;}
.leaderboard-row:last-child{border-bottom:none;}
.leaderboard-row.is-you{background:rgba(110,198,255,.08); border-radius:8px;}
.lb-rank{font-family:var(--font-mono); color:var(--text-dim); width:28px; flex-shrink:0;}
.lb-name{flex:1; min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;}
.lb-points{font-family:var(--font-mono); font-weight:700; color:#6EC6FF;}

/* NAME PROMPT MODAL */
.name-modal-overlay{position:fixed; inset:0; background:rgba(0,0,0,.6); display:flex; align-items:center; justify-content:center; z-index:1000; padding:20px;}
.name-modal{background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:24px; max-width:340px; width:100%; text-align:center;}
.name-modal h4{font-family:var(--font-display); font-size:17px; margin-bottom:6px;}
.name-modal p{color:var(--text-dim); font-size:13px; margin-bottom:14px;}
.name-modal input{width:100%; padding:11px 14px; background:var(--bg); border:1px solid var(--line); border-radius:8px; color:var(--text); font-family:var(--font-body); font-size:14px; margin-bottom:12px;}

/* ABOUT PAGE */
.about-card{max-width:560px; margin:0 auto; background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:36px 30px; text-align:center;}
.about-avatar{width:64px; height:64px; border-radius:50%; background:linear-gradient(135deg,#6EC6FF,#B98CFF); display:flex; align-items:center; justify-content:center; font-family:var(--font-display); font-weight:700; font-size:26px; color:#08131c; margin:0 auto 16px;}
.about-card h2{font-family:var(--font-display); font-size:24px; margin-bottom:4px;}
.about-tagline{color:#6EC6FF; font-size:13.5px; margin-bottom:20px;}
.about-card h3{font-family:var(--font-display); font-size:15px; margin:22px 0 8px;}
.about-text{color:var(--text-dim); font-size:14.5px; line-height:1.8;}
.about-ig-link{display:inline-flex; margin-top:22px;}