/* =========================================
   BİLİŞİMCİ HOCAM — KURS LAB CSS
   ========================================= */

*{margin:0;padding:0;box-sizing:border-box}

    :root{
      --bg-primary:#0a0c0f;
      --bg-secondary:#14181f;
      --bg-tertiary:#1e2630;
      --text-primary:#e2e8f0;
      --text-secondary:#94a3b8;
      --text-muted:#64748b;
      --border-color:#2d3748;
      --hover-bg:#232c38;
      --terminal-bg:#0d1117;
      --terminal-green:#3bc798;
      /* Kurs teması - JS ile override edilir */
      --accent:#0ff4e6;
      --accent2:#b967ff;
      --accent3:#ff3b9c;
      --glow:0 0 15px rgba(15,244,230,.3);
      --level1:#4a90e2;
      --level2:#4ade80;
      --level3:#fbbf24;
      --level4:#f87171;
      --level5:#c084fc;
    }

    body.light-mode{
      --bg-primary:#f0f4fa;
      --bg-secondary:#ffffff;
      --bg-tertiary:#f8fafd;
      --text-primary:#1a2b4c;
      --text-secondary:#334155;
      --text-muted:#64748b;
      --border-color:#cbd5e1;
      --hover-bg:#e3f0ff;
      --terminal-bg:#1e293b;
    }

    body{background:var(--bg-primary);color:var(--text-primary);font-family:'Space Grotesk',sans-serif;min-height:100vh;padding:20px;transition:background .3s,color .2s}

    .container{max-width:1600px;margin:0 auto;display:flex;flex-direction:column;gap:20px}

    /* TOP BAR */
    .top-bar{display:flex;justify-content:space-between;align-items:center;background:var(--bg-secondary);padding:12px 25px;border-radius:28px;border:1px solid var(--border-color);gap:15px;flex-wrap:wrap}
    .logo{display:flex;align-items:center;gap:15px}
    .logo-badge{background:var(--terminal-bg);border:2px solid var(--accent);border-radius:12px;padding:8px 15px;font-family:'JetBrains Mono',monospace;font-weight:700;font-size:18px;color:var(--accent);box-shadow:var(--glow);position:relative;white-space:nowrap}
    .logo-badge::before{content:'>';position:absolute;left:-18px;color:var(--accent3);animation:blink 1s infinite}
    @keyframes blink{0%,100%{opacity:1}50%{opacity:0}}
    .logo-text{font-size:20px;font-weight:600;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
    .back-btn{padding:8px 16px;border-radius:30px;border:1px solid var(--border-color);background:var(--bg-tertiary);color:var(--text-primary);cursor:pointer;display:flex;align-items:center;gap:6px;font-size:13px;font-weight:600;text-decoration:none;transition:all .2s}
    .back-btn:hover{transform:translateY(-2px);border-color:var(--accent)}
    .header-actions{display:flex;gap:10px;flex-wrap:wrap}
    .btn{padding:8px 16px;border-radius:30px;border:1px solid var(--border-color);background:var(--bg-tertiary);color:var(--text-primary);cursor:pointer;display:flex;align-items:center;gap:6px;font-size:13px;font-weight:600;transition:all .2s}
    .btn:hover{transform:translateY(-2px);box-shadow:0 4px 10px rgba(0,0,0,.1)}
    .btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));border:none;color:white}
    .btn.success{background:#06d6a0;border:none;color:black}
    .btn.warning{background:#ffd166;border:none;color:black}
    .btn.danger{background:#f44336;border:none;color:white}
    .theme-toggle{width:44px;height:44px;border-radius:50%;background:var(--bg-tertiary);border:1px solid var(--border-color);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:20px;color:var(--accent);transition:all .2s}
    .theme-toggle:hover{transform:rotate(30deg);box-shadow:var(--glow)}

    /* ANA GRID */
    .main-grid{display:grid;grid-template-columns:minmax(280px,360px) minmax(0,1fr) minmax(260px,340px);gap:20px;align-items:start}

    /* SOL PANEL */
    .curriculum-panel{background:var(--bg-secondary);border-radius:28px;padding:20px;border:1px solid var(--border-color);display:flex;flex-direction:column;gap:15px;height:750px;overflow:hidden;min-width:0}
    .panel-header{display:flex;justify-content:space-between;align-items:center;flex-shrink:0;background:var(--bg-secondary);padding-bottom:10px;border-bottom:1px solid var(--border-color);z-index:10}
    .panel-header h2{font-size:18px;display:flex;align-items:center;gap:8px}
    .chapter-count{background:linear-gradient(135deg,var(--accent),var(--accent2));padding:4px 12px;border-radius:30px;font-size:13px;font-weight:600;color:white}
    .search-box{width:100%;flex-shrink:0;padding:12px 16px;background:var(--bg-tertiary);border:2px solid var(--border-color);border-radius:40px;color:var(--text-primary);font-size:14px;outline:none;transition:.3s}
    .search-box:focus{border-color:var(--accent)}

    .level-group{margin-bottom:10px;user-select:none}
    .level-header{display:flex;align-items:center;gap:10px;padding:13px 12px;background:var(--bg-tertiary);border-left:5px solid var(--accent);border-radius:15px;cursor:pointer;transition:all .3s ease}
    .level-header:hover{transform:translateX(5px);background:var(--hover-bg)}
    .level-icon{font-size:1.3em}
    .level-info{flex:1;font-size:14px;font-weight:700}
    .level-stats{font-size:.82em;color:var(--text-muted);font-weight:600;background:var(--bg-secondary);padding:4px 10px;border-radius:20px;display:flex;align-items:center;gap:8px}
    .level-arrow{transition:transform .3s;width:20px;text-align:center}
    .level-group.open .level-arrow{transform:rotate(90deg)}
    .chapters-list{max-height:0;overflow:hidden;transition:max-height .4s ease-in-out;margin-left:15px;padding-left:10px;border-left:2px dashed var(--border-color)}
    .level-group.open .chapters-list{max-height:5000px;margin-top:10px;margin-bottom:15px}

    .chapter-item{background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:16px;padding:10px 12px;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;gap:12px;margin-bottom:8px}
    .chapter-item:hover{transform:translateX(6px);border-color:var(--accent);box-shadow:0 4px 12px rgba(0,0,0,.1)}
    .chapter-item.active{background:var(--hover-bg);border-color:var(--accent);border-width:2px}
    .chapter-item.completed{border-color:#06d6a0}
    .chapter-item.locked{opacity:.4;cursor:not-allowed;border-color:transparent!important;background:var(--bg-primary)!important;transform:none!important;box-shadow:none!important}
    .chapter-badge{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;flex-shrink:0;color:black;background:var(--accent)}
    .chapter-item.completed .chapter-badge{background:#06d6a0;color:white}
    .chapter-item.locked .chapter-badge{background:var(--bg-tertiary)!important;color:var(--text-muted)!important;border:1px dashed var(--border-color)}
    .chapter-content{flex:1}
    .chapter-title{display:block;font-size:13px;font-weight:600;color:var(--text-primary);margin-bottom:2px}
    .chapter-category{font-size:11px;color:var(--text-muted)}
    .chapter-status{font-size:16px;width:24px;text-align:center}

    /* ORTA PANEL */
    .editor-panel{background:var(--bg-secondary);border-radius:28px;padding:20px;border:1px solid var(--border-color);display:flex;flex-direction:column;gap:15px;height:750px;min-width:0;overflow:hidden}
    .editor-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
    .editor-header h3{display:flex;align-items:center;gap:8px;font-size:17px}
    .editor-actions{display:flex;gap:10px;flex-wrap:wrap}
    .code-editor{width:100%;max-width:100%;box-sizing:border-box;height:450px;background:var(--terminal-bg);border:1px solid var(--border-color);border-radius:20px;padding:20px;font-family:'JetBrains Mono',monospace;font-size:14px;color:#e2e8f0;resize:none;outline:none;line-height:1.6}
    .code-editor:focus{border-color:var(--accent)}
    .output-area{background:var(--terminal-bg);border-radius:20px;overflow:hidden;border:1px solid var(--border-color);flex:1;display:flex;flex-direction:column}
    .output-header{padding:12px 20px;background:#0a0e12;display:flex;justify-content:space-between;font-size:13px;color:var(--text-muted)}
    .output-content{padding:15px 20px;flex:1;overflow-y:auto;font-family:'JetBrains Mono',monospace;color:var(--terminal-green);font-size:14px}

    /* SAĞ PANEL */
    .roadmap-panel{background:var(--bg-secondary);border-radius:28px;padding:20px;border:1px solid var(--border-color);min-height:750px;height:auto;display:flex;flex-direction:column;gap:18px;min-width:0;overflow-y:auto}
    .roadmap-header{display:flex;align-items:center;gap:10px;padding-bottom:15px;border-bottom:1px solid var(--border-color)}
    .roadmap-header i{color:var(--accent);font-size:22px}
    .roadmap-visual{flex:1;display:flex;flex-direction:column;justify-content:space-around;padding:10px 0;gap:18px}
    .roadmap-stage{display:flex;align-items:center;gap:15px;position:relative}
    .roadmap-stage:not(:last-child)::after{content:'';position:absolute;left:20px;top:45px;bottom:-18px;width:3px;background:linear-gradient(to bottom,var(--line-color,var(--accent)),transparent);opacity:.5;z-index:1}
    .stage-marker{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;z-index:2;position:relative;background:var(--accent);color:black;box-shadow:0 0 15px var(--accent)}
    .stage-info{flex:1}
    .stage-name{font-size:15px;font-weight:600;margin-bottom:5px}
    .stage-progress{display:flex;align-items:center;gap:10px}
    .stage-bar{flex:1;height:8px;background:var(--bg-tertiary);border-radius:20px;overflow:hidden}
    .stage-bar-fill{height:100%;border-radius:20px;transition:width .4s;background:linear-gradient(90deg,var(--accent),var(--accent2))}
    .stage-percent{font-size:13px;font-weight:600;min-width:42px}
    .stage-count{font-size:11px;color:var(--text-muted);margin-top:2px}
    .roadmap-stats{background:var(--bg-tertiary);border-radius:20px;padding:15px;display:grid;grid-template-columns:1fr 1fr;gap:15px}
    body.light-mode .roadmap-stats{background:#fff;border:1px solid var(--border-color);box-shadow:0 2px 8px rgba(0,0,0,.05)}
    .stat-box{text-align:center}
    .stat-box-value{font-size:26px;font-weight:700;color:var(--accent)}
    body.light-mode .stat-box-value{color:#1e3c72}
    .stat-box-label{font-size:12px;color:var(--text-muted)}
    .badges-wrapper{margin-top:5px;padding-top:12px;border-top:1px dashed var(--border-color)}
    .badges-wrapper h4{font-size:13px;margin-bottom:8px;display:flex;align-items:center;gap:8px}
    .badge-container{display:flex;gap:8px;flex-wrap:wrap}
    .badge{background:linear-gradient(135deg,#ffd166,#ff9800);color:black;padding:5px 12px;border-radius:20px;font-size:12px;font-weight:bold;box-shadow:0 2px 5px rgba(0,0,0,.2)}

    /* ALT PANEL */
    .theory-panel{background:var(--bg-secondary);border-radius:28px;padding:30px;border:1px solid var(--border-color);margin-top:10px;width:100%}
    .theory-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px;padding-bottom:15px;border-bottom:1px solid var(--border-color)}
    .theory-header h2{font-size:26px;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
    .theory-content{line-height:1.8;color:var(--text-secondary)}
    .theory-content h2{color:var(--accent);font-size:22px;margin:0 0 15px}
    body.light-mode .theory-content h2{color:#1a3a7a}
    .theory-content h3{color:var(--accent);font-size:20px;margin:25px 0 12px}
    body.light-mode .theory-content h3{color:#2a5298}
    .theory-content h4{font-size:16px;margin:18px 0 8px;color:var(--text-primary)}
    .theory-content p{margin-bottom:12px}
    .theory-content ul,.theory-content ol{margin:10px 0 12px 22px}
    .theory-content li{margin-bottom:5px}
    .theory-content code{background:var(--bg-tertiary);padding:2px 8px;border-radius:6px;font-family:'JetBrains Mono',monospace;font-size:.9em;color:var(--accent)}
    body.light-mode .theory-content code{background:#edf2ff;color:#2a5298}
    .code-block{background:var(--terminal-bg);border-radius:16px;padding:20px;margin:20px 0;border-left:4px solid var(--accent);font-family:'JetBrains Mono',monospace;color:var(--terminal-green);overflow-x:auto}
    .meta-row{display:flex;flex-wrap:wrap;gap:10px;margin:15px 0 20px}
    .meta-pill{background:linear-gradient(135deg,var(--bg-tertiary),var(--bg-secondary));border:1px solid var(--accent);padding:8px 16px;border-radius:40px;font-size:13px;font-weight:600}
    .meta-pill span{color:var(--accent);margin-right:6px}
    body.light-mode .meta-pill{background:#f5f7ff;border-color:#2a5298}
    body.light-mode .meta-pill span{color:#2a5298}
    .mini-svg{width:100%;height:auto;margin:15px 0 5px;border-radius:20px;background:var(--bg-tertiary);padding:10px;box-shadow:0 8px 20px rgba(0,0,0,.3)}
    body.light-mode .mini-svg{background:#fff;border:1px solid var(--border-color);box-shadow:0 5px 15px rgba(0,0,0,.05)}
    .info-box,.warning-box,.tip-box,.example-box{padding:18px;margin:20px 0;border-radius:18px;box-shadow:0 5px 15px rgba(0,0,0,.2)}
    body.light-mode .info-box,body.light-mode .warning-box,body.light-mode .tip-box,body.light-mode .example-box{box-shadow:0 2px 10px rgba(0,0,0,.05);border:1px solid var(--border-color)}
    .info-box{background:rgba(33,150,243,.1);border-left:6px solid #2196f3}
    .warning-box{background:rgba(255,152,0,.1);border-left:6px solid #ff9800}
    .tip-box{background:rgba(76,175,80,.1);border-left:6px solid #4caf50}
    .example-box{background:rgba(156,39,176,.1);border-left:6px solid #9c27b0}
    table{width:100%;border-collapse:collapse;background:var(--bg-tertiary);border-radius:15px;overflow:hidden;margin:15px 0}
    body.light-mode table{background:#fff;border:1px solid var(--border-color)}
    th{background:linear-gradient(135deg,var(--accent),var(--accent2));color:black;padding:12px}
    td{padding:10px;border-bottom:1px solid var(--border-color)}

    /* ÖĞRENME KONTROLÜ */
    .control-panel{background:var(--bg-tertiary);border-radius:25px;padding:30px;margin-top:20px}
    body.light-mode .control-panel{background:#f8fafd;border:1px solid var(--border-color)}
    .control-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:15px;margin-bottom:20px}
    .progress-info{background:linear-gradient(135deg,var(--accent),var(--accent2));color:black;padding:12px 20px;border-radius:40px;font-size:1em;font-weight:700;box-shadow:0 4px 10px rgba(0,0,0,.2)}
    .question-container{background:var(--bg-secondary);border-radius:20px;padding:25px;box-shadow:0 8px 25px rgba(0,0,0,.1);border:1px solid var(--border-color)}
    .question-text{font-size:1.15em;color:var(--text-primary);margin-bottom:20px;font-weight:700;line-height:1.5;white-space:pre-line}
    .question-type{display:inline-block;background:linear-gradient(135deg,var(--accent),var(--accent2));color:black;padding:6px 16px;border-radius:40px;font-size:.88em;margin-bottom:15px;font-weight:700;letter-spacing:.5px}
    .options-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:15px;margin:20px 0}
    .option-btn{padding:15px;border:2px solid var(--border-color);border-radius:15px;background:var(--bg-tertiary);color:var(--text-primary);cursor:pointer;transition:all .2s ease;text-align:left;font-size:1em;font-weight:500}
    body.light-mode .option-btn{background:#fff}
    .option-btn:hover{border-color:var(--accent);background:rgba(15,244,230,.05);transform:translateY(-2px)}
    .option-btn.selected{border-color:var(--accent);background:rgba(15,244,230,.15);color:var(--accent);font-weight:600}
    .option-btn.correct-answer{border-color:#06d6a0;background:rgba(6,214,160,.2);color:#06d6a0;font-weight:600}
    .option-btn.wrong-answer{border-color:#f44336;background:rgba(244,67,54,.2);color:#f44336;font-weight:600}
    .true-false{display:flex;gap:20px;justify-content:center;margin:25px 0;flex-wrap:wrap}
    .tf-btn{padding:18px 45px;font-size:1.3em;border:none;border-radius:50px;cursor:pointer;transition:all .3s ease;font-weight:900;box-shadow:0 8px 20px rgba(0,0,0,.2)}
    .tf-btn.true{background:#06d6a0;color:black}
    .tf-btn.false{background:#f44336;color:white}
    .tf-btn:hover{transform:scale(1.08);box-shadow:0 12px 30px rgba(0,0,0,.3)}
    .tf-btn.selected,.tf-btn.correct-answer,.tf-btn.wrong-answer{transform:scale(1.1);box-shadow:0 0 0 4px var(--accent)}
    .result-box{margin:20px 0;padding:18px;border-radius:50px;text-align:center;font-size:1.15em;font-weight:800}
    .result-box.correct{background:rgba(6,214,160,.2);color:#06d6a0;border:3px solid #06d6a0}
    .result-box.wrong{background:rgba(244,67,54,.2);color:#f44336;border:3px solid #f44336}
    .quiz-nav{display:flex;gap:12px;margin-top:25px;align-items:center;background:var(--bg-tertiary);padding:15px;border-radius:60px}
    body.light-mode .quiz-nav{background:#f0f4fa;border:1px solid var(--border-color)}
    .tab-header{display:flex;background:var(--bg-tertiary);border-bottom:3px solid var(--accent);border-radius:20px 20px 0 0;overflow:hidden}
    body.light-mode .tab-header{background:#f5f7fc}
    .tab-btn{flex:1;padding:16px;border:none;background:none;cursor:pointer;font-size:1em;font-weight:700;color:var(--text-secondary);transition:all .3s ease;position:relative}
    .tab-btn:hover{background:rgba(15,244,230,.08);color:var(--accent)}
    .tab-btn.active{color:var(--accent);background:var(--bg-secondary)}
    .tab-btn.active::after{content:'';position:absolute;left:0;bottom:-3px;width:100%;height:3px;background:var(--accent)}
    .tab-content{display:none}
    .tab-content.active{display:block}

    /* ===== TERMİNAL INPUT SATIRI ===== */
    .terminal-input-row{display:flex;align-items:center;gap:8px;padding:4px 0;border-top:1px solid rgba(255,255,255,.05);margin-top:4px}
    .terminal-prompt{color:var(--accent);font-family:'JetBrains Mono',monospace;font-size:14px;white-space:nowrap;flex-shrink:0}
    .terminal-input{background:transparent;border:none;outline:none;color:#fff;font-family:'JetBrains Mono',monospace;font-size:14px;flex:1;caret-color:var(--accent)}
    body.light-mode .terminal-input{color:#1a2b4c}
    .terminal-waiting{color:#ffd166;font-size:12px;font-weight:600;display:flex;align-items:center;gap:5px;padding:4px 8px;background:rgba(255,209,102,.1);border-radius:8px;margin-top:4px}

    /* ===== VİDEO SEKMESİ ===== */
    .video-wrapper{position:relative;width:100%;padding-bottom:56.25%;border-radius:20px;overflow:hidden;background:#000;box-shadow:0 8px 30px rgba(0,0,0,.4);margin-bottom:20px}
    .video-wrapper iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:0}
    .video-placeholder{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--bg-tertiary);color:var(--text-muted);gap:15px;border-radius:20px;border:2px dashed var(--border-color)}
    .video-placeholder i{font-size:48px;color:var(--accent);opacity:.4}
    .video-placeholder p{font-size:14px;text-align:center;max-width:300px;line-height:1.6}
    .video-note{background:var(--bg-tertiary);border-radius:15px;padding:15px 20px;font-size:13px;color:var(--text-muted);display:flex;align-items:center;gap:10px;border:1px solid var(--border-color)}
    body.light-mode .video-note{background:#f8fafd}
    .video-note i{color:var(--accent);font-size:16px;flex-shrink:0}
    .video-timestamp{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:black;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:700;cursor:pointer;margin:3px}
    .video-timestamp:hover{opacity:.85;transform:scale(1.05)}

    /* KURS YÜKLEME PLACEHOLDER */
    .no-code-notice{background:var(--bg-tertiary);border:2px dashed var(--border-color);border-radius:20px;padding:30px;text-align:center;color:var(--text-muted);margin:10px 0}
    .no-code-notice i{font-size:32px;margin-bottom:10px;display:block;color:var(--accent);opacity:.5}

    @media(max-width:1200px){.main-grid{grid-template-columns:300px 1fr}}
    @media(max-width:900px){.main-grid{grid-template-columns:1fr}.roadmap-panel{display:none}.editor-panel,.curriculum-panel{height:auto}}