/* ===== SKILLY SHARED STYLES GÇö all courses use this file ===== */*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}:root{  --bg:#0a0a0f;--bg-secondary:#111118;--bg-card:#16161f;--bg-card-hover:#1c1c28;  --accent:#6c5ce7;--accent-light:#a29bfe;--accent-glow:rgba(108,92,231,.25);  --text:#f0f0f5;--text-sec:#a0a0b8;--text-muted:#6c6c80;  --border:rgba(255,255,255,.06);--border-hover:rgba(255,255,255,.12);  --gradient:linear-gradient(135deg,#6c5ce7,#a29bfe);  --radius:12px;--radius-sm:8px;  --sidebar-w:280px;--header-h:60px;  --font:-apple-system,BlinkMacSystemFont,'Segoe UI','Inter',sans-serif;  --mono:'JetBrains Mono','Fira Code','Cascadia Code',monospace;  --green:#00d68f;--yellow:#ffaa00;--red:#ff4757;--blue:#339af0;  --tip-bg:rgba(0,214,143,.08);--tip-border:#00d68f;  --warn-bg:rgba(255,170,0,.08);--warn-border:#ffaa00;  --imp-bg:rgba(108,92,231,.08);--imp-border:#6c5ce7;}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden}a{text-decoration:none;color:inherit}ul,ol{list-style:none}img{max-width:100%;display:block}.header{position:fixed;top:0;left:0;right:0;height:var(--header-h);background:rgba(10,10,15,.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);z-index:100;display:flex;align-items:center}.header .container{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:1440px;margin:0 auto;padding:0 24px}.header-logo{font-size:1.3rem;font-weight:800;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-nav{display:flex;align-items:center;gap:24px}.header-nav a{font-size:.88rem;font-weight:500;color:var(--text-sec);transition:color .2s}.header-nav a:hover{color:var(--text)}.header-nav .btn-sm{padding:7px 18px;background:var(--gradient);color:#fff;border-radius:var(--radius-sm);font-weight:600;font-size:.85rem;transition:opacity .2s}.header-nav .btn-sm:hover{opacity:.85}.mobile-toggle{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:4px}.mobile-toggle span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:transform .3s,opacity .3s}.mobile-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}.mobile-toggle.active span:nth-child(2){opacity:0}.mobile-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}.layout{display:flex;margin-top:var(--header-h);min-height:calc(100vh - var(--header-h))}.page-wrapper{display:flex;margin-top:var(--header-h);min-height:calc(100vh - var(--header-h))}.sidebar{position:fixed;top:var(--header-h);left:0;bottom:0;width:var(--sidebar-w);background:var(--bg-secondary);border-right:1px solid var(--border);overflow-y:auto;padding:24px 0;z-index:50;transition:transform .3s}.sidebar::-webkit-scrollbar{width:4px}.sidebar::-webkit-scrollbar-thumb{background:var(--border-hover);border-radius:4px}.sidebar-section{margin-bottom:8px}.sidebar-heading{padding:10px 20px 6px;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;color:var(--text-muted);cursor:pointer;display:flex;align-items:center;justify-content:space-between;user-select:none}+font-size:.65rem;transition:transform .2s}.sidebar-heading.collapsed::after{transform:rotate(-90deg)}.sidebar-items{overflow:hidden;transition:max-height .3s ease}.sidebar-items.collapsed{max-height:0!important}.sidebar-items a{display:flex;align-items:center;gap:10px;padding:8px 20px 8px 28px;font-size:.87rem;color:var(--text-sec);transition:background .2s,color .2s;border-left:2px solid transparent}.sidebar-items a:hover{background:rgba(255,255,255,.03);color:var(--text)}.sidebar-items a.active{color:var(--accent-light);border-left-color:var(--accent);background:rgba(108,92,231,.08);font-weight:600}.sidebar-items a .lesson-check{width:14px;height:14px;border-radius:3px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.03);display:inline-flex;align-items:center;justify-content:center;font-size:.63rem;font-weight:800;color:transparent;flex:0 0 14px}.sidebar-items a .lesson-check.done{border-color:#16c784;background:rgba(22,199,132,.22);color:#16c784}.sidebar-items a .num{font-size:.75rem;font-weight:600;color:var(--text-muted);min-width:18px}.sidebar-items a.completed{color:#aef3d2}.sidebar-items a .num.completed{color:#16c784}.main,.main-content{margin-left:var(--sidebar-w);flex:1;padding:48px 56px 80px;max-width:900px}.main>*+*,.main-content>*+*{margin-top:28px}h1{font-size:2.2rem;font-weight:700;letter-spacing:-.02em;line-height:1.2}h2{font-size:1.5rem;font-weight:700;letter-spacing:-.01em;margin-top:48px;margin-bottom:16px;padding-bottom:10px;border-bottom:1px solid var(--border)}h3{font-size:1.15rem;font-weight:600;margin-top:32px;margin-bottom:10px}h4{font-size:1rem;font-weight:600;margin-top:24px;margin-bottom:8px}p{margin-bottom:14px;color:var(--text-sec);line-height:1.8}strong{color:var(--text);font-weight:600}.subtitle{font-size:1.05rem;color:var(--text-sec);margin-top:8px;margin-bottom:32px;line-height:1.7}.topic-meta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:32px}.topic-badge{padding:4px 14px;border-radius:20px;font-size:.78rem;font-weight:600}.badge-beginner{background:rgba(0,214,143,.1);color:var(--green)}.badge-intermediate{background:rgba(255,170,0,.1);color:var(--yellow)}.badge-advanced{background:rgba(255,71,87,.1);color:var(--red)}.badge-hands-on{background:rgba(51,154,240,.1);color:var(--blue)}.code-block{position:relative;background:#0d0d14;border:1px solid var(--border);border-radius:var(--radius);margin:16px 0 20px;overflow:hidden}.code-header{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;background:rgba(255,255,255,.03);border-bottom:1px solid var(--border);font-size:.78rem;color:var(--text-muted)}.code-header .lang{font-weight:600;text-transform:uppercase;letter-spacing:.5px}.copy-btn{background:rgba(255,255,255,.06);border:1px solid var(--border);color:var(--text-sec);padding:4px 12px;border-radius:6px;cursor:pointer;font-size:.75rem;font-family:var(--font);transition:background .2s,color .2s}.copy-btn:hover{background:rgba(255,255,255,.1);color:var(--text)}.copy-btn.copied{background:rgba(0,214,143,.15);color:var(--green);border-color:rgba(0,214,143,.3)}pre{padding:16px 20px;overflow-x:auto;font-family:var(--mono);font-size:.88rem;line-height:1.7;color:#c9d1d9}pre::-webkit-scrollbar{height:6px}pre::-webkit-scrollbar-thumb{background:var(--border-hover);border-radius:3px}code{font-family:var(--mono);font-size:.88rem}p code,li code{background:rgba(108,92,231,.12);padding:2px 7px;border-radius:4px;font-size:.84rem;color:var(--accent-light)}.info-box{border-radius:var(--radius);padding:16px 20px;margin:20px 0;border-left:4px solid;display:flex;gap:12px}.info-box .icon{font-size:1.2rem;flex-shrink:0;margin-top:2px}.info-box .content{flex:1}.info-box .content p{margin-bottom:6px;color:var(--text-sec)}.info-box .content p:last-child{margin-bottom:0}.info-box .content ul{margin:6px 0;padding-left:18px;list-style:disc}.info-box .content ol{margin:6px 0;padding-left:20px;list-style:decimal}.info-box .content li{font-size:.9rem;color:var(--text-sec);margin-bottom:6px}.info-box .label{font-weight:700;font-size:.85rem;margin-bottom:4px}.info-tip{background:var(--tip-bg);border-color:var(--tip-border)}.info-tip .label{color:var(--green)}.info-warning{background:var(--warn-bg);border-color:var(--warn-border)}.info-warning .label{color:var(--yellow)}.info-important{background:var(--imp-bg);border-color:var(--imp-border)}.info-important .label{color:var(--accent-light)}.info-practice{background:rgba(51,154,240,.08);border-color:#339af0}.info-practice .label{color:var(--blue)}.diagram{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;margin:20px 0;text-align:center;overflow-x:auto}.diagram-title{font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);margin-bottom:20px}.diagram-row{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;margin:12px 0}.diagram-box{padding:12px 20px;background:var(--bg-card-hover);border:1px solid var(--border-hover);border-radius:var(--radius-sm);font-size:.88rem;font-weight:500;color:var(--text);min-width:120px;text-align:center}.diagram-box.highlight{border-color:var(--accent);background:rgba(108,92,231,.12);color:var(--accent-light)}.diagram-arrow{color:var(--text-muted);font-size:1.2rem}.diagram-group{display:flex;flex-direction:column;gap:8px;padding:16px;border:1px dashed var(--border-hover);border-radius:var(--radius);min-width:140px}.diagram-group-title{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:var(--accent-light);margin-bottom:4px}.diagram-small{padding:8px 14px;background:var(--bg);border:1px solid var(--border);border-radius:6px;font-size:.8rem;color:var(--text-sec)}.interview-section{margin:24px 0}.interview-section h3{margin-bottom:16px}.question-list{display:flex;flex-direction:column;gap:12px}.question{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.question-header{padding:14px 20px;cursor:pointer;display:flex;align-items:center;justify-content:space-between;font-size:.92rem;font-weight:500;transition:background .2s;user-select:none}.question-header:hover{background:rgba(255,255,255,.02)}.question-header .q-icon{font-size:.75rem;color:var(--text-muted);transition:transform .25s}.question-header .q-icon.open{transform:rotate(180deg)}.question-answer{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease}.question-answer.open{max-height:600px;padding:0 20px 16px}.question-answer p{font-size:.9rem;color:var(--text-sec);line-height:1.7}.bottom-nav{display:flex;align-items:center;justify-content:space-between;margin-top:64px;padding-top:32px;border-top:1px solid var(--border);gap:16px}.nav-btn{display:flex;flex-direction:column;gap:4px;padding:16px 24px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);transition:border-color .2s,background .2s,transform .2s;max-width:45%;min-width:0}.nav-btn:hover{border-color:var(--border-hover);background:var(--bg-card-hover);transform:translateY(-2px)}.nav-btn .dir{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted)}.nav-btn .title{font-size:.92rem;font-weight:500;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.nav-btn.prev{align-items:flex-start}.nav-btn.next{align-items:flex-end;margin-left:auto}.back-link{display:inline-flex;align-items:center;gap:6px;font-size:.85rem;color:var(--accent-light);margin-top:16px;transition:gap .2s}.back-link:hover{gap:10px}.course-hero{text-align:center;padding:64px 0 48px}.course-hero h1{font-size:clamp(2rem,5vw,3rem);margin-bottom:12px}.course-hero .subtitle{max-width:680px;margin:12px auto 32px}.course-stats{display:flex;justify-content:center;gap:40px;flex-wrap:wrap;margin-top:32px}.course-stat{text-align:center}.course-stat .val{font-size:1.6rem;font-weight:700;font-family:var(--mono);color:var(--text)}.course-stat .lbl{font-size:.8rem;color:var(--text-muted);margin-top:2px}.btn-start{display:inline-flex;align-items:center;gap:8px;padding:14px 36px;background:var(--gradient);color:#fff;border-radius:var(--radius-sm);font-weight:600;font-size:1rem;transition:transform .2s,box-shadow .2s;border:none;cursor:pointer}.btn-start:hover{transform:translateY(-2px);box-shadow:0 8px 32px var(--accent-glow)}.path-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;margin-top:48px}.path-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;transition:transform .3s,border-color .3s,box-shadow .3s}.path-card:hover{transform:translateY(-3px);border-color:var(--border-hover);box-shadow:0 4px 24px rgba(0,0,0,.3)}.path-card .card-icon{font-size:1.8rem;margin-bottom:14px}.path-card h3{font-size:1.1rem;font-weight:600;margin:0 0 8px;border:none;padding:0}.path-card p{font-size:.88rem;color:var(--text-sec);margin-bottom:14px}.path-card .topics{display:flex;flex-direction:column;gap:6px;margin-top:12px;padding-top:12px;border-top:1px solid var(--border)}.path-card .topics span{font-size:.82rem;color:var(--text-muted);display:flex;align-items:center;gap:6px}.path-card .topics .num{color:var(--accent-light);font-weight:600}.progress-wrap{margin:32px 0}.progress-bar{height:6px;background:var(--bg-card);border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:var(--gradient);border-radius:3px;width:0;transition:width .5s ease}.progress-label{font-size:.8rem;color:var(--text-muted);margin-top:6px;text-align:right}.course-progress-panel{margin:14px 0 24px;padding:14px;border:1px solid var(--border);border-radius:12px;background:linear-gradient(135deg,rgba(108,92,231,.08),rgba(255,255,255,.01))}.course-progress-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:10px}.course-progress-title{font-size:.86rem;font-weight:700;color:var(--text)}.course-progress-count{font-size:.8rem;color:var(--text-sec)}.course-progress-track{width:100%;height:8px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden}.course-progress-fill{display:block;height:100%;background:linear-gradient(90deg,#16c784,#4cd9a2);border-radius:inherit}.course-progress-foot{font-size:.78rem;color:var(--text-muted);margin-top:8px;text-align:right}.main ol,.main-content ol{list-style:decimal;padding-left:24px;margin:12px 0}.main ol li,.main-content ol li{margin-bottom:8px;color:var(--text-sec);font-size:.95rem}.main ul,.main-content ul{list-style:disc;padding-left:24px;margin:12px 0}.main ul li,.main-content ul li{margin-bottom:8px;color:var(--text-sec);font-size:.95rem}table{width:100%;border-collapse:collapse;margin:16px 0;font-size:.9rem}th,td{padding:10px 16px;text-align:left;border-bottom:1px solid var(--border)}th{font-weight:600;color:var(--text);background:var(--bg-card);font-size:.82rem;text-transform:uppercase;letter-spacing:.5px}td{color:var(--text-sec)}tr:hover td{background:rgba(255,255,255,.02)}@media(max-width:900px){  .sidebar{transform:translateX(-100%)}  .sidebar.open{transform:translateX(0)}  .main,.main-content{margin-left:0;padding:32px 20px 60px}  .mobile-toggle{display:flex}  .header-nav .nav-link{display:none}  .course-stats{gap:24px}  .bottom-nav{flex-direction:column}  .nav-btn{max-width:100%;width:100%}  .nav-btn.next{align-items:flex-start;text-align:left}  .path-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}  .course-hero{padding:48px 0 32px}  .course-hero h1{font-size:clamp(1.8rem,4vw,2.8rem)}}/* Tablet friendly at 768px */@media(max-width:768px){  .sidebar{width:240px;padding:20px 0}  .header .container{padding:0 16px}  .header-logo{font-size:1.1rem}  .main,.main-content{padding:28px 18px 50px}  .path-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}  .course-stats{gap:20px;font-size:0.9rem}  .course-stat .val{font-size:1.4rem}  .bottom-nav{gap:12px}  h1{font-size:1.8rem}  h2{font-size:1.35rem}  h3{font-size:1.05rem}  p{font-size:0.95rem}  .course-hero h1{font-size:clamp(1.6rem,3.5vw,2.4rem)}}/* Mobile at 480px and below */@media(max-width:480px){  .main,.main-content{padding:20px 14px 40px}  .main>*+*,.main-content>*+*{margin-top:20px}  h1{font-size:1.4rem;margin-bottom:8px}  h2{font-size:1.1rem;margin-top:32px;margin-bottom:12px;padding-bottom:8px}  h3{font-size:0.95rem;margin-top:24px;margin-bottom:8px}  h4{font-size:0.9rem;margin-top:18px;margin-bottom:6px}  p{font-size:0.9rem;margin-bottom:12px}  .subtitle{font-size:0.95rem;margin-bottom:24px}  .topic-meta{gap:8px;margin-bottom:20px}  .topic-badge{padding:3px 10px;font-size:0.7rem}  .course-hero{padding:32px 0 24px;text-align:left}  .course-hero h1{font-size:clamp(1.3rem,5vw,2rem)}  .course-hero .subtitle{text-align:left}  .course-stats{flex-direction:column;gap:16px;align-items:flex-start}  .course-stat{text-align:left}  .course-stat .val{font-size:1.3rem}  .course-stat .lbl{font-size:0.75rem}  .btn-start{padding:10px 24px;font-size:0.9rem;gap:6px}  .path-grid{grid-template-columns:1fr;gap:12px}  .path-card{padding:20px 16px}  .path-card h3{font-size:0.95rem}  .path-card p{font-size:0.8rem}  .sidebar-heading{padding:8px 16px 4px;font-size:0.65rem}  .sidebar-items a{padding:6px 16px 6px 24px;font-size:0.8rem}  .sidebar-items a .num{font-size:0.7rem}  .header-nav{gap:16px}  .header-nav .btn-sm{padding:6px 14px;font-size:0.8rem}  .header-nav a {font-size: 0.8rem;}  .question-header{padding:12px 16px;font-size:0.85rem}  .question-answer.open{padding:0 16px 12px}  .code-header{padding:6px 12px;font-size:0.7rem}  .copy-btn{padding:3px 10px;font-size:0.7rem}  pre{padding:12px 14px;font-size:0.8rem}  code{font-size:0.8rem}  p code,li code{padding:2px 5px;font-size:0.75rem}  .info-box{padding:12px 16px;margin:16px 0;gap:10px}  .info-box .icon{font-size:1rem}  .info-box .content p{font-size:0.85rem}  .info-box .content li{font-size:0.8rem}  .diagram{padding:20px;margin:16px 0}  .diagram-box{padding:8px 12px;font-size:0.8rem;min-width:100px}  .diagram-title{font-size:0.7rem;margin-bottom:12px}  .bottom-nav{margin-top:48px;padding-top:24px;gap:8px;flex-direction:column}  .nav-btn{padding:12px 16px;border-radius:8px}  .nav-btn .dir{font-size:0.7rem}  .nav-btn .title{font-size:0.85rem}  .back-link{font-size:0.8rem;margin-top:12px}  .progress-wrap{margin:24px 0}  .progress-bar{height:4px}  .progress-label{font-size:0.75rem}  .main ol,.main-content ol {    padding-left: 20px;    margin: 10px 0;  }  .main ol li,.main-content ol li{    margin-bottom: 6px;    font-size: 0.9rem;  }  .main ul,.main-content ul {    padding-left: 20px;    margin: 10px 0;  }  .main ul li,.main-content ul li{    margin-bottom: 6px;    font-size: 0.9rem;  }  table {    font-size: 0.8rem;  }  th, td {    padding: 8px 10px;  }}

/* Desktop/base styles for lesson nav controls */
.lesson-quick-actions{display:flex;flex-wrap:wrap;gap:10px;margin:8px 0 12px}
.lesson-quick-btn{display:inline-flex;align-items:center;justify-content:center;padding:8px 14px;border-radius:10px;border:1px solid var(--border);background:var(--bg-card);color:var(--text-sec);font-size:.84rem;line-height:1.2;max-width:100%;text-align:center;transition:background .2s,border-color .2s,color .2s}
.lesson-quick-btn:hover{background:var(--bg-card-hover);border-color:var(--border-hover);color:var(--text)}
.lesson-quick-btn.primary{background:var(--gradient);color:#fff;border-color:transparent}
.lesson-quick-btn.primary:hover{opacity:.9}
.technology-nav{margin:10px 0 18px;padding:12px;border:1px solid var(--border);border-radius:12px;background:linear-gradient(135deg,rgba(108,92,231,.08),rgba(255,255,255,.01))}
.technology-nav-head{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:10px}
.technology-nav-kicker{font-size:.74rem;text-transform:uppercase;letter-spacing:.8px;color:var(--text-muted)}
.technology-nav-current{font-size:.86rem;color:var(--text)}
.technology-nav-actions{display:flex;flex-wrap:wrap;gap:8px}
.technology-nav-btn{display:inline-flex;align-items:center;justify-content:center;padding:8px 12px;border-radius:8px;border:1px solid var(--border);background:var(--bg-card);color:var(--text-sec);font-size:.82rem;line-height:1.25;max-width:100%;transition:background .2s,border-color .2s,color .2s}
.technology-nav-btn:hover{background:var(--bg-card-hover);border-color:var(--border-hover);color:var(--text)}
.technology-nav-btn.all{background:rgba(108,92,231,.12);color:var(--accent-light);border-color:rgba(108,92,231,.3)}
.technology-nav-btn.disabled{opacity:.65;pointer-events:none}

/* Sidebar section toggle marker (ASCII-safe) */
.sidebar-heading::after{content:'+';font-size:.65rem;transition:transform .2s}

/* Center and style the in-row Back to Course link */
.bottom-nav .nav-btn.prev{order:1}
.bottom-nav .back-link{
	order:2;
	margin:0 auto;
	display:inline-flex;
	align-items:center;
	justify-content:center;
	padding:12px 18px;
	border-radius:10px;
	border:1px solid var(--border);
	background:var(--bg-card);
	color:var(--text-sec);
	min-height:48px;
}
.bottom-nav .back-link:hover{background:var(--bg-card-hover);border-color:var(--border-hover);color:var(--text)}
.bottom-nav .nav-btn.next{order:3}

@media(max-width:900px){
	.bottom-nav .back-link{
		width:100%;
		margin:0;
	}
}