:root{
  --ink:#0B0F14;
  --panel:#121822;
  --panel-2:#171F2B;
  --line:#26313F;
  --text:#E9EDF1;
  --muted:#8A96A6;
  --amber:#F0B429;
  --cyan:#5FD0DE;
  --rose:#FF7A7A;
  --mint:#7FD9A6;
  --radius:10px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important;}
}
body{margin:0; background:var(--ink); color:var(--text); font-family:'Inter',sans-serif; -webkit-font-smoothing:antialiased;}
.mono{font-family:'JetBrains Mono',monospace;}
.display{font-family:'Space Grotesk',sans-serif;}
a{color:inherit; text-decoration:none;}
img,svg{display:block;}
.wrap{max-width:1180px; margin:0 auto; padding:0 28px;}
main{display:block;}

/* ---------- ANNOUNCEMENT BANNER (terminal / CRT) ---------- */
.announcement-bar{
  position:relative; overflow:hidden; text-align:center;
  padding:11px 20px; background:#050708;
  border-bottom:1px solid rgba(127,217,166,0.35);
  box-shadow:0 1px 14px rgba(127,217,166,0.12);
}
.announcement-scanlines{
  content:""; position:absolute; inset:0; pointer-events:none; opacity:0.5;
  background:repeating-linear-gradient(
    to bottom, rgba(127,217,166,0.05) 0px, rgba(127,217,166,0.05) 1px,
    transparent 1px, transparent 3px
  );
  animation:announcement-scan 7s linear infinite;
}
@keyframes announcement-scan{
  0%{transform:translateY(0);}
  100%{transform:translateY(48px);}
}
.announcement-prompt{
  position:relative; font-family:'JetBrains Mono',monospace; font-size:12.5px; font-weight:600;
  color:var(--amber); text-shadow:0 0 6px rgba(240,180,41,0.55); margin-right:8px;
}
.announcement-text{
  position:relative; display:inline-block;
  font-family:'JetBrains Mono',monospace; font-size:13px; font-weight:600; letter-spacing:0.01em;
  color:var(--mint); text-shadow:0 0 6px rgba(127,217,166,0.65), 0 0 1px rgba(127,217,166,0.9);
  white-space:pre;
}
.announcement-cursor{
  position:relative; display:inline-block; margin-left:2px; color:var(--mint);
  text-shadow:0 0 6px rgba(127,217,166,0.65);
  animation:announcement-blink 1s steps(1) infinite;
}
@keyframes announcement-blink{
  0%, 49%{opacity:1;}
  50%, 100%{opacity:0;}
}

/* ---------- NAV ---------- */
header{position:sticky; top:0; z-index:50; background:rgba(11,15,20,0.9); backdrop-filter:blur(10px); border-bottom:1px solid var(--line);}
.navbar{display:flex; align-items:center; justify-content:space-between; height:68px; gap:16px;}
.nav-search{flex:1; max-width:220px;}
.nav-search input{
  width:100%; background:var(--panel); border:1px solid var(--line); color:var(--text);
  border-radius:7px; padding:8px 12px; font-size:13px; font-family:'Inter',sans-serif;
}
.nav-search input:focus{outline:2px solid var(--cyan); outline-offset:1px; border-color:var(--cyan);}
.nav-search input::placeholder{color:var(--muted);}
.brand{display:flex; align-items:center; gap:10px; font-family:'Space Grotesk',sans-serif; font-weight:700; font-size:18px; letter-spacing:-0.02em;}
.brand .dot{width:9px; height:9px; border-radius:50%; background:var(--amber); box-shadow:0 0 0 3px rgba(240,180,41,0.15);}
.brand .path{color:var(--muted); font-family:'JetBrains Mono',monospace; font-weight:400; font-size:13px;}
nav.links{display:flex; gap:32px; font-size:14px; color:var(--muted);}
nav.links a:hover{color:var(--text);}
.nav-cta{display:flex; gap:12px; align-items:center;}
.nav-menu{display:flex; align-items:center; gap:28px; flex:1; justify-content:flex-end;}
.nav-toggle{
  display:none; flex-direction:column; justify-content:center; align-items:center; gap:5px;
  width:38px; height:38px; padding:0; background:transparent; border:1px solid var(--line);
  border-radius:8px; cursor:pointer; flex:none;
}
.nav-toggle span{display:block; width:18px; height:2px; background:var(--text);}
.btn{display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:10px 20px; border-radius:8px; font-size:14px; font-weight:600; cursor:pointer; border:1px solid transparent; transition:all .15s ease; font-family:'Inter',sans-serif;}
.btn-primary{background:var(--amber); color:#1A1300;}
.btn-primary:hover{background:#ffc94a;}
.btn-primary:disabled{opacity:0.5; cursor:not-allowed;}
.btn-ghost{border-color:var(--line); color:var(--text); background:transparent;}
.btn-ghost:hover{border-color:var(--muted);}
.btn-sm{padding:7px 14px; font-size:13px;}
.btn-block{width:100%;}
form.inline{display:inline;}

/* ---------- FLASH MESSAGES ---------- */
.flash-wrap{padding-top:16px; display:flex; flex-direction:column; gap:8px;}
.flash{font-family:'JetBrains Mono',monospace; font-size:13px; padding:10px 14px; border-radius:7px; border:1px solid var(--line);}
.flash-error{color:var(--rose); border-color:rgba(255,122,122,0.35); background:rgba(255,122,122,0.07);}
.flash-success{color:var(--mint); border-color:rgba(127,217,166,0.35); background:rgba(127,217,166,0.07);}
.flash-info{color:var(--cyan); border-color:rgba(95,208,222,0.35); background:rgba(95,208,222,0.07);}
.verify-banner-wrap{padding-top:16px;}
.verify-banner{display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:10px;}

/* ---------- HERO ---------- */
.hero{padding:88px 0 64px; border-bottom:1px solid var(--line); position:relative; overflow:hidden;}
.hero-grid{display:grid; grid-template-columns:1.15fr 0.85fr; gap:64px; align-items:center;}
.prompt-line{font-family:'JetBrains Mono',monospace; font-size:13px; color:var(--mint); margin-bottom:18px; display:flex; gap:8px; align-items:center;}
.prompt-line .caret{display:inline-block; width:8px; height:16px; background:var(--mint); animation:blink 1.1s steps(1) infinite;}
@keyframes blink{50%{opacity:0;}}
h1.hero-h{font-family:'Space Grotesk',sans-serif; font-weight:700; letter-spacing:-0.03em; font-size:52px; line-height:1.05; margin:0 0 22px;}
h1.hero-h .fn{color:var(--amber);}
h1.hero-h .str{color:var(--cyan);}
.hero p.lead{font-size:17px; line-height:1.65; color:var(--muted); max-width:520px; margin:0 0 32px;}
.hero-ctas{display:flex; gap:14px; margin-bottom:44px;}
.stat-row{display:flex; gap:32px; flex-wrap:wrap; font-family:'JetBrains Mono',monospace; font-size:13px;}
.stat-row div span.k{color:var(--muted);}
.stat-row div span.v{color:var(--text); font-weight:600;}

.tree{background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden;}
.tree-bar{display:flex; align-items:center; gap:7px; padding:11px 14px; border-bottom:1px solid var(--line); background:var(--panel-2);}
.tree-bar i{width:10px; height:10px; border-radius:50%; display:inline-block;}
.tree-bar i:nth-child(1){background:#FF6159;} .tree-bar i:nth-child(2){background:#FFBD2E;} .tree-bar i:nth-child(3){background:#28C840;}
.tree-bar span{margin-left:8px; font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--muted);}
.tree-body{padding:18px 20px; font-family:'JetBrains Mono',monospace; font-size:13.5px; line-height:2.05;}
.tree-body .folder{color:var(--amber);}
.tree-body .file{color:var(--muted); padding-left:22px; display:block;}
.tree-body .file .n{color:var(--cyan);}
.tree-body .indent{padding-left:16px;}

/* ---------- SECTIONS ---------- */
section{padding:84px 0;}
.section-head{max-width:640px; margin:0 0 48px;}
.eyebrow{font-family:'JetBrains Mono',monospace; font-size:12.5px; color:var(--amber); letter-spacing:0.02em; margin:0 0 12px; display:block;}
h2.section-title{font-family:'Space Grotesk',sans-serif; font-size:34px; letter-spacing:-0.02em; margin:0 0 14px; font-weight:700;}
.section-head p{color:var(--muted); font-size:15.5px; line-height:1.6; margin:0;}

/* ---------- COURSE TABS / CARDS ---------- */
.tabs{display:flex; gap:8px; margin-bottom:36px; flex-wrap:wrap;}
.tab{font-family:'JetBrains Mono',monospace; font-size:13px; padding:9px 16px; border:1px solid var(--line); border-radius:7px; color:var(--muted); cursor:pointer; background:var(--panel); transition:all .15s ease;}
.tab.active{color:#1A1300; background:var(--amber); border-color:var(--amber); font-weight:600;}
.tab:hover:not(.active){border-color:var(--muted); color:var(--text);}
.course-panel{display:none;}
.course-panel.active{display:grid; grid-template-columns:repeat(2,1fr); gap:18px;}

.ccard{background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; display:flex; flex-direction:column; transition:border-color .15s ease, transform .15s ease;}
.ccard:hover{border-color:var(--muted); transform:translateY(-2px);}
.ccard-bar{display:flex; align-items:center; gap:6px; padding:10px 14px; background:var(--panel-2); border-bottom:1px solid var(--line);}
.ccard-bar i{width:8px; height:8px; border-radius:50%; display:inline-block;}
.ccard-bar i:nth-child(1){background:#FF6159;} .ccard-bar i:nth-child(2){background:#FFBD2E;} .ccard-bar i:nth-child(3){background:#28C840;}
.ccard-bar span{margin-left:6px; font-family:'JetBrains Mono',monospace; font-size:11.5px; color:var(--muted);}
.ccard-body{padding:20px; flex:1; display:flex; flex-direction:column;}
.ccard-body h3{font-family:'Space Grotesk',sans-serif; font-size:19px; margin:0 0 8px; font-weight:600;}
.ccard-body p{color:var(--muted); font-size:13.8px; line-height:1.55; margin:0 0 18px; flex:1;}
.ccard-meta{display:flex; gap:14px; font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--muted); margin-bottom:16px; flex-wrap:wrap;}
.ccard-meta b{color:var(--cyan); font-weight:500;}
.ccard-foot{display:flex; align-items:center; justify-content:space-between; padding-top:14px; border-top:1px dashed var(--line);}
.price-comment{font-family:'JetBrains Mono',monospace; color:var(--mint); font-size:14.5px; font-weight:600;}
.price-comment::before{content:"// "; color:#4A5A66;}

.mastery-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:14px;}
.mcard{background:var(--panel); border:1px solid var(--line); border-radius:9px; padding:16px 18px; display:flex; align-items:center; justify-content:space-between; gap:10px; transition:border-color .15s ease;}
.mcard:hover{border-color:var(--cyan);}
.mcard .lang{font-family:'JetBrains Mono',monospace; font-weight:600; font-size:14px;}
.mcard .lang small{display:block; color:var(--muted); font-weight:400; font-size:11.5px; margin-top:3px;}
.mcard .mprice{font-family:'JetBrains Mono',monospace; font-size:13px; color:var(--amber); white-space:nowrap;}
.mastery-note{margin-top:22px; border:1px solid var(--line); border-radius:var(--radius); background:var(--panel); padding:18px 22px; display:flex; gap:16px; align-items:flex-start; font-size:13.8px; color:var(--muted);}
.mastery-note b{color:var(--text);}

/* ---------- PRICING ---------- */
.plans{display:grid; grid-template-columns:repeat(4,1fr); gap:16px;}
.plan{background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:26px 22px; display:flex; flex-direction:column;}
.plan.featured{border-color:var(--amber); background:linear-gradient(180deg, rgba(240,180,41,0.07), var(--panel) 40%); position:relative;}
.plan-badge{position:absolute; top:-11px; left:22px; background:var(--amber); color:#1A1300; font-family:'JetBrains Mono',monospace; font-size:11px; font-weight:700; padding:3px 10px; border-radius:5px;}
.plan h3{font-family:'Space Grotesk',sans-serif; font-size:19px; margin:6px 0 4px;}
.plan .ptag{color:var(--muted); font-size:12.5px; margin-bottom:18px;}
.plan .pprice{font-family:'JetBrains Mono',monospace; font-size:30px; font-weight:700; margin-bottom:2px;}
.plan .pprice small{font-size:13px; color:var(--muted); font-weight:400;}
.plan .psave{font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--mint); margin-bottom:18px; min-height:16px;}
.plan ul{list-style:none; margin:0 0 22px; padding:0; flex:1;}
.plan ul li{font-size:13.3px; color:var(--text); padding:7px 0; display:flex; gap:9px; align-items:flex-start; border-top:1px solid var(--line);}
.plan ul li:first-child{border-top:none;}
.plan ul li::before{content:"›"; color:var(--cyan); font-family:'JetBrains Mono',monospace; font-weight:700;}

/* ---------- REVENUE / MARKETPLACE ---------- */
.feat-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:14px;}
.fcard{border:1px solid var(--line); border-radius:9px; padding:18px; background:var(--panel);}
.fcard .ftitle{font-family:'JetBrains Mono',monospace; font-size:13.5px; color:var(--amber); margin-bottom:8px; font-weight:600;}
.fcard p{font-size:12.8px; color:var(--muted); line-height:1.5; margin:0;}
.marketplace-strip{margin-top:56px; border:1px solid var(--line); border-radius:var(--radius); background:var(--panel); padding:26px 30px; display:grid; grid-template-columns:1.2fr 1fr; gap:30px; align-items:center;}
.marketplace-strip h3{font-family:'Space Grotesk',sans-serif; font-size:20px; margin:0 0 10px;}
.marketplace-strip p{color:var(--muted); font-size:13.8px; line-height:1.6; margin:0;}
.upgrade-flow{font-family:'JetBrains Mono',monospace; font-size:12.5px; color:var(--muted); line-height:1.9;}
.upgrade-flow .arrow{color:var(--cyan);}
.upgrade-flow .credit{color:var(--mint);}

/* ---------- AUTH FORMS ---------- */
.auth-wrap{max-width:420px; margin:0 auto; padding:90px 28px 100px;}
.form-card{background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:32px;}
.form-card h1{font-family:'Space Grotesk',sans-serif; font-size:26px; margin:0 0 8px;}
.form-card .sub{color:var(--muted); font-size:13.8px; margin:0 0 26px;}
.field{margin-bottom:18px;}
.field label{display:block; font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--muted); margin-bottom:7px;}
.field input, .field textarea, .field select{width:100%; background:var(--ink); border:1px solid var(--line); color:var(--text); border-radius:7px; padding:11px 13px; font-size:14px; font-family:'Inter',sans-serif; resize:vertical;}
.field input:focus, .field textarea:focus, .field select:focus{outline:2px solid var(--cyan); outline-offset:1px; border-color:var(--cyan);}
.form-foot{margin-top:20px; font-size:13.3px; color:var(--muted); text-align:center;}
.form-foot a{color:var(--cyan);}
.oauth-divider{display:flex; align-items:center; gap:12px; margin:18px 0; color:var(--muted); font-size:12px; text-transform:uppercase; letter-spacing:0.05em;}
.oauth-divider::before, .oauth-divider::after{content:""; flex:1; height:1px; background:var(--line);}
.btn-google{
  background:#fff; color:#1f1f1f; border:1px solid var(--line);
  display:flex; align-items:center; justify-content:center; gap:8px;
}
.btn-google:hover{background:#f2f2f2;}

/* ---------- DASHBOARD ---------- */
.dash-head{display:flex; justify-content:space-between; align-items:flex-end; gap:20px; margin-bottom:40px; flex-wrap:wrap;}
.dash-head h1{font-family:'Space Grotesk',sans-serif; font-size:30px; margin:0 0 6px;}
.dash-head p{color:var(--muted); margin:0; font-size:14px;}
.plan-pill{font-family:'JetBrains Mono',monospace; font-size:12.5px; padding:8px 14px; border-radius:20px; border:1px solid var(--line); color:var(--muted);}
.plan-pill.active{color:var(--mint); border-color:rgba(127,217,166,0.35); background:rgba(127,217,166,0.07);}
.dash-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px;}
.empty-state{border:1px dashed var(--line); border-radius:var(--radius); padding:36px; text-align:center; color:var(--muted); grid-column:1/-1;}
.empty-state a{color:var(--amber);}

/* ---------- COURSE DETAIL ---------- */
.course-hero{padding:64px 0 48px; border-bottom:1px solid var(--line);}
.course-hero-grid{display:grid; grid-template-columns:1.4fr 1fr; gap:48px; align-items:start;}
.course-hero .eyebrow{margin-bottom:14px;}
.course-hero h1{font-family:'Space Grotesk',sans-serif; font-size:38px; letter-spacing:-0.02em; margin:0 0 16px;}
.course-hero p.lead{color:var(--muted); font-size:15.5px; line-height:1.65; max-width:560px;}
.buy-card{background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:26px;}
.buy-card .bprice{font-family:'JetBrains Mono',monospace; font-size:32px; font-weight:700; margin-bottom:4px;}
.buy-card .bmeta{font-family:'JetBrains Mono',monospace; font-size:12.5px; color:var(--muted); margin-bottom:22px;}
.owned-badge{display:inline-flex; align-items:center; gap:8px; font-family:'JetBrains Mono',monospace; font-size:13px; color:var(--mint); background:rgba(127,217,166,0.08); border:1px solid rgba(127,217,166,0.3); padding:10px 14px; border-radius:8px; width:100%; justify-content:center;}
.capstone-card{
  border:1px solid rgba(240,180,41,0.35); border-radius:var(--radius);
  background:rgba(240,180,41,0.05); padding:24px 26px;
}
.capstone-card h3{font-family:'Space Grotesk',sans-serif; font-size:21px; margin:8px 0 10px;}
.capstone-card p{color:var(--text); font-size:14.5px; line-height:1.65; margin:0;}
.capstone-lock{color:var(--muted) !important; font-size:13px !important; font-family:'JetBrains Mono',monospace; margin-top:12px !important;}

.unlock-nudge{
  margin:32px 0; padding:20px 24px; border-radius:var(--radius);
  border:1px solid rgba(95,208,222,0.35); background:rgba(95,208,222,0.05);
  display:flex; flex-direction:column; align-items:flex-start; gap:10px;
}
.unlock-nudge p{margin:0; color:var(--text); font-size:14.5px; line-height:1.6;}
.unlock-nudge-final{border-color:rgba(240,180,41,0.4); background:rgba(240,180,41,0.06);}

/* ---------- CURRICULUM (on course detail) ---------- */
.curriculum{border:1px solid var(--line); border-radius:var(--radius); overflow:hidden;}
.lesson-row{display:flex; align-items:center; gap:14px; padding:14px 18px; border-bottom:1px solid var(--line); background:var(--panel); transition:background .15s ease;}
.lesson-row:last-child{border-bottom:none;}
a.lesson-row:hover{background:var(--panel-2);}
.lesson-row.locked{color:var(--muted); cursor:default;}
.lesson-row .lnum{font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--muted); width:22px;}
.lesson-row .ltitle{flex:1; font-size:14px;}
.lesson-row .lmeta{font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--muted);}

/* ---------- DASHBOARD PROGRESS ---------- */
.progress-label{font-size:11.5px; color:var(--muted); margin-bottom:6px;}
.progress-bar{height:6px; border-radius:4px; background:var(--panel-2); border:1px solid var(--line); overflow:hidden;}
.progress-fill{height:100%; background:var(--mint);}

/* ---------- LESSON VIEWER ---------- */
.lesson-layout{display:grid; grid-template-columns:280px 1fr; gap:40px; padding:40px 28px 100px; align-items:start;}
.lesson-sidebar{position:sticky; top:88px; border:1px solid var(--line); border-radius:var(--radius); background:var(--panel); overflow:hidden;}
.lesson-sidebar-head{padding:16px 18px; border-bottom:1px solid var(--line);}
.report-issue-link{display:inline-block; margin:-4px 0 22px; font-size:12.5px; color:var(--muted); font-family:'JetBrains Mono',monospace;}
.report-issue-link:hover{color:var(--rose);}
.back-link{font-family:'JetBrains Mono',monospace; font-size:12.5px; color:var(--muted);}
.back-link:hover{color:var(--text);}
.lesson-list{list-style:none; margin:0; padding:8px 0; max-height:60vh; overflow-y:auto;}
.lesson-list li a, .lesson-list li .locked-item{display:flex; align-items:center; gap:10px; padding:9px 18px; font-size:13.3px; color:var(--muted);}
.lesson-list li a:hover{background:var(--panel-2); color:var(--text);}
.lesson-list li.current a{color:var(--amber); background:var(--panel-2); font-weight:600;}
.lesson-list li.done a .check{color:var(--mint);}
.lesson-list .check{font-family:'JetBrains Mono',monospace; font-size:11.5px; width:16px; text-align:center; flex-shrink:0;}

.lesson-content{max-width:680px;}
.lesson-content h1{font-family:'Space Grotesk',sans-serif; font-size:30px; margin:10px 0 26px;}
.lesson-body{font-size:15.3px; line-height:1.75; color:var(--text);}
.lesson-body p{margin:0 0 18px;}
.lesson-body h2{font-family:'Space Grotesk',sans-serif; font-size:20px; margin:32px 0 14px;}
.lesson-body h3{font-family:'Space Grotesk',sans-serif; font-size:17px; margin:26px 0 10px;}
.lesson-body ul, .lesson-body ol{margin:0 0 18px; padding-left:22px;}
.lesson-body li{margin-bottom:8px;}
.lesson-body pre{background:var(--panel); border:1px solid var(--line); border-radius:8px; padding:16px 18px; overflow-x:auto; margin:0 0 20px;}
.lesson-body code{font-family:'JetBrains Mono',monospace; font-size:13.3px; color:var(--cyan);}
.lesson-body p code, .lesson-body li code{background:var(--panel); border:1px solid var(--line); padding:1px 6px; border-radius:4px;}
.lesson-body blockquote{border-left:3px solid var(--amber); margin:0 0 18px; padding:4px 0 4px 16px; color:var(--muted); font-style:italic;}
.lesson-actions{display:flex; justify-content:space-between; align-items:center; margin-top:44px; padding-top:24px; border-top:1px solid var(--line);}

@media (max-width:820px){
  .lesson-layout{grid-template-columns:1fr; padding:24px 20px 80px;}
  .lesson-sidebar{position:static;}
}

/* ---------- CERTIFICATE ---------- */
.cert-frame{
  max-width:760px; margin:40px auto 0; padding:6px;
  background:linear-gradient(135deg, var(--amber), var(--cyan));
  border-radius:16px;
}
.cert-inner{
  background:var(--panel); border-radius:12px; padding:60px 50px; text-align:center;
}
.cert-eyebrow{font-size:12px; color:var(--muted); letter-spacing:0.15em; margin-bottom:28px;}
.cert-label{font-family:'JetBrains Mono',monospace; font-size:13px; color:var(--amber); text-transform:uppercase; letter-spacing:0.08em; margin-bottom:22px;}
.cert-name{font-family:'Space Grotesk',sans-serif; font-size:34px; font-weight:700; margin-bottom:10px;}
.cert-body{color:var(--muted); font-size:14px; margin-bottom:10px;}
.cert-course{font-family:'Space Grotesk',sans-serif; font-size:22px; color:var(--cyan); margin-bottom:28px;}
.cert-meta{font-size:12px; color:var(--muted); margin-bottom:6px;}
.cert-verify{font-size:11px; color:var(--muted); word-break:break-all;}
@media (max-width:640px){
  .cert-inner{padding:36px 24px;}
  .cert-name{font-size:26px;}
  .cert-course{font-size:18px;}
}

/* ---------- COURSE STATUS CALLOUTS ---------- */
.status-callout{
  display:block; text-decoration:none;
  border:1px solid var(--line); border-radius:var(--radius); background:var(--panel);
  padding:16px 18px; margin-top:14px; font-size:13.5px; color:var(--text);
}
.status-callout:hover{border-color:var(--muted);}
.status-callout.pending{border-color:rgba(240,180,41,0.35); background:rgba(240,180,41,0.06);}
.status-callout.done{border-color:rgba(127,217,166,0.35); background:rgba(127,217,166,0.06);}

/* ---------- CODE PLAYGROUND ---------- */
.playground{
  margin:26px 0; border:1px solid var(--line); border-radius:var(--radius);
  overflow:hidden; background:var(--panel);
}
.playground-bar{
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  padding:10px 14px; background:var(--panel-2); border-bottom:1px solid var(--line);
}
.playground-bar .plabel{font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--muted);}
.demo-lang-switch{display:flex; gap:4px;}
.demo-lang-btn{
  font-family:'JetBrains Mono',monospace; font-size:12px; font-weight:600;
  background:transparent; color:var(--muted); border:1px solid var(--line); border-radius:6px;
  padding:5px 11px; cursor:pointer;
}
.demo-lang-btn:hover{color:var(--text); border-color:var(--cyan);}
.demo-lang-btn.active{background:var(--panel); color:var(--cyan); border-color:var(--cyan);}
.playground-status{
  flex:1; text-align:right; font-family:'JetBrains Mono',monospace; font-size:12px; font-weight:600;
}
.playground-status.pass{color:var(--mint);}
.playground-status.fail{color:var(--rose);}
.playground-run{
  font-family:'JetBrains Mono',monospace; font-size:12.5px; font-weight:600;
  background:var(--amber); color:#1A1300; border:none; border-radius:6px;
  padding:6px 14px; cursor:pointer;
}
.playground-run:hover{background:#ffc94a;}
.playground-run:disabled{opacity:0.6; cursor:default;}
.playground-editor{
  width:100%; min-height:160px; resize:vertical; border:none; outline:none;
  background:var(--ink); color:var(--text); font-family:'JetBrains Mono',monospace;
  font-size:13.5px; line-height:1.6; padding:16px 18px; tab-size:2;
  display:block;
}
.continue-card{
  display:flex; align-items:center; justify-content:space-between; gap:20px; flex-wrap:wrap;
  background:rgba(240,180,41,0.06); border:1px solid rgba(240,180,41,0.35); border-radius:var(--radius);
  padding:18px 22px; margin-bottom:24px; transition:border-color 0.15s;
}
.continue-card:hover{border-color:var(--amber);}
.continue-card h3{font-family:'Space Grotesk',sans-serif; font-size:17px; margin:6px 0 0; color:var(--text);}
.referral-card{
  display:flex; align-items:center; justify-content:space-between; gap:20px; flex-wrap:wrap;
  background:var(--panel); border:1px solid var(--line); border-radius:var(--radius);
  padding:18px 22px; margin-bottom:24px;
}
.referral-link-row{min-width:260px; flex:1; max-width:400px;}
.coupon-field{
  width:100%; background:var(--ink); border:1px solid var(--line); color:var(--text);
  border-radius:7px; padding:9px 12px; font-size:13px; font-family:'JetBrains Mono',monospace;
  margin:10px 0; display:block;
}
.coupon-field:focus{outline:2px solid var(--cyan); outline-offset:1px; border-color:var(--cyan);}
.coupon-field::placeholder{color:var(--muted);}
.exercise-hint{
  margin:-14px 0 0; font-size:12.5px; color:var(--muted); font-style:italic;
}
.CodeMirror{
  height:auto; min-height:160px; background:var(--ink) !important;
  font-family:'JetBrains Mono',monospace !important; font-size:13.5px; line-height:1.6;
  padding:8px 0;
}
.CodeMirror-gutters{background:var(--ink) !important; border-right:1px solid var(--line) !important;}
.playground-output-bar{
  padding:8px 14px; background:var(--panel-2); border-top:1px solid var(--line);
  border-bottom:1px solid var(--line); font-family:'JetBrains Mono',monospace;
  font-size:11px; color:var(--muted); text-transform:uppercase; letter-spacing:0.05em;
}
.playground-output{
  margin:0; padding:14px 18px; min-height:60px; max-height:280px; overflow-y:auto;
  background:var(--ink); color:var(--mint); font-family:'JetBrains Mono',monospace;
  font-size:13px; white-space:pre-wrap; word-break:break-word;
}
.playground-output.error{color:var(--rose);}
.playground-frame{
  width:100%; height:280px; border:none; background:#fff; display:block;
}
.admin-nav{display:flex; gap:8px; margin-bottom:28px; flex-wrap:wrap;}
.admin-nav a{font-family:'JetBrains Mono',monospace; font-size:13px; padding:8px 14px; border-radius:7px; border:1px solid var(--line); color:var(--muted);}
.admin-nav a:hover{color:var(--text); border-color:var(--cyan);}
.admin-nav a.active{background:var(--panel-2); color:var(--text); border-color:var(--amber);}
.admin-stats{display:grid; grid-template-columns:repeat(auto-fit, minmax(160px,1fr)); gap:14px; margin-bottom:36px;}
.admin-stat{background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:18px;}
.admin-stat .v{display:block; font-family:'Space Grotesk',sans-serif; font-size:26px; font-weight:700;}
.admin-stat .k{color:var(--muted); font-size:12.5px;}
.admin-pagination{display:flex; align-items:center; justify-content:center; gap:16px; margin:8px 0 24px; flex-wrap:wrap;}
.admin-pagination-status{font-family:'JetBrains Mono',monospace; font-size:12.5px; color:var(--muted);}
.admin-pagination .disabled{opacity:0.4; pointer-events:none;}
.table-scroll{overflow-x:auto; margin-bottom:20px;}
.table-scroll .admin-table{margin-bottom:0; min-width:520px;}
.admin-table{width:100%; border-collapse:collapse; font-size:13.5px; margin-bottom:20px;}
.admin-table th{text-align:left; color:var(--muted); font-family:'JetBrains Mono',monospace; font-size:11px; text-transform:uppercase; letter-spacing:0.05em; padding:10px 12px; border-bottom:1px solid var(--line);}
.admin-table td{padding:12px; border-bottom:1px solid var(--line); vertical-align:middle;}
.admin-table tr:hover td{background:rgba(255,255,255,0.02);}
.badge{display:inline-block; font-family:'JetBrains Mono',monospace; font-size:11px; padding:3px 8px; border-radius:5px; background:var(--panel-2); border:1px solid var(--line); color:var(--muted);}
.badge.admin{color:var(--amber); border-color:rgba(240,180,41,0.4);}
.badge.active{color:var(--mint); border-color:rgba(127,217,166,0.4);}
.badge.past_due{color:var(--rose); border-color:rgba(255,122,122,0.4);}
.review-list{display:flex; flex-direction:column; gap:14px;}
.review-card{border:1px solid var(--line); border-radius:var(--radius); background:var(--panel); padding:16px 18px;}
.review-head{display:flex; align-items:center; gap:10px; flex-wrap:wrap;}
.review-stars{color:var(--amber); letter-spacing:1px; font-size:14px;}
.review-name{font-family:'Space Grotesk',sans-serif; font-weight:600; font-size:14px;}
.review-date{color:var(--muted); font-size:12.5px; margin-left:auto;}
.review-comment{margin:10px 0 0; color:var(--text); font-size:14px; line-height:1.6;}
.exercise-prompt{
  padding:14px 18px; background:rgba(240,180,41,0.06); border-bottom:1px solid var(--line);
  font-size:13.5px; color:var(--text); line-height:1.6;
}
.exercise-prompt strong{color:var(--amber);}
.exercise-expected{
  padding:14px 18px; background:rgba(127,217,166,0.06); border-bottom:1px solid var(--line);
  font-size:13.5px; color:var(--text); line-height:1.6;
}
.exercise-expected strong{color:var(--mint); display:block; margin-bottom:6px;}
.exercise-expected pre{
  margin:0; padding:10px 14px; background:var(--ink); border-radius:6px;
  font-family:'JetBrains Mono',monospace; font-size:13px; color:var(--mint);
  white-space:pre-wrap; word-break:break-word;
}
.exercise-expected-open{color:var(--muted); font-style:italic;}
.exercise-expected-open strong{display:inline; color:var(--muted); margin:0;}

/* ---------- SIMPLE / STATIC PAGES ---------- */
.simple-page{padding:80px 0 100px; max-width:720px; margin:0 auto;}
.simple-page h1{font-family:'Space Grotesk',sans-serif; font-size:36px; margin:0 0 20px;}
.simple-page h2{font-family:'Space Grotesk',sans-serif; font-size:20px; margin:36px 0 12px; font-weight:700;}
.simple-page p{color:var(--muted); font-size:15.5px; line-height:1.7; margin:0 0 18px;}
.simple-page ul{color:var(--muted); font-size:15.5px; line-height:1.7; margin:0 0 18px; padding-left:22px;}
.simple-page li{margin-bottom:6px;}
.simple-page a{color:var(--cyan); text-decoration:underline;}
.simple-page .icon-big{font-family:'JetBrains Mono',monospace; font-size:13px; color:var(--mint); margin-bottom:18px; display:block;}

/* ---------- FOOTER ---------- */
footer{border-top:1px solid var(--line); padding:52px 0 32px;}
.foot-grid{display:grid; grid-template-columns:1.4fr repeat(3,1fr); gap:36px; margin-bottom:40px;}
.foot-grid h4{font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--muted); margin:0 0 14px; letter-spacing:0.03em; text-transform:uppercase;}
.foot-grid ul{list-style:none; margin:0; padding:0;}
.foot-grid li{margin-bottom:10px; font-size:13.5px; color:var(--muted);}
.foot-grid li a:hover{color:var(--text);}
.foot-bottom{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px; padding-top:24px; border-top:1px solid var(--line); font-size:12.5px; color:var(--muted); font-family:'JetBrains Mono',monospace;}
.foot-legal-links{display:flex; gap:16px;}
header{position:relative;}

/* ---------- PROJECT HUB ---------- */
.ph-hero{padding:72px 0 48px; text-align:center; border-bottom:1px solid var(--line);}
.ph-hero h1{font-family:'Space Grotesk',sans-serif; font-size:44px; letter-spacing:-0.02em; margin:0 0 14px;}
.ph-hero p{color:var(--muted); font-size:16px; margin:0 0 28px;}
.ph-hero-actions{display:flex; gap:14px; justify-content:center; flex-wrap:wrap;}
.btn-lg{padding:14px 26px; font-size:15.5px;}

.ph-category-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:16px; padding:40px 0;}
.ph-category-tile{
  display:block; text-decoration:none; border:1px solid var(--line); border-radius:var(--radius);
  background:var(--panel); padding:20px; transition:transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.ph-category-tile:hover{transform:translateY(-3px); border-color:var(--amber); box-shadow:0 10px 24px rgba(0,0,0,0.35);}
.ph-category-tile .emoji{font-size:28px; display:block; margin-bottom:10px;}
.ph-category-tile h3{font-family:'Space Grotesk',sans-serif; font-size:15.5px; margin:0 0 4px;}
.ph-category-tile p{color:var(--muted); font-size:12.5px; margin:0; line-height:1.5;}

.ph-section{padding:28px 0;}
.ph-section-head{display:flex; align-items:baseline; justify-content:space-between; margin-bottom:18px; gap:12px; flex-wrap:wrap;}
.ph-section-head h2{font-family:'Space Grotesk',sans-serif; font-size:20px; margin:0;}
.ph-section-head .sub{color:var(--muted); font-size:13px;}

.ph-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:18px;}
.ph-card{
  display:flex; flex-direction:column; text-decoration:none; color:var(--text);
  border:1px solid var(--line); border-radius:var(--radius); background:var(--panel);
  overflow:hidden; transition:transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.ph-card:hover{transform:translateY(-4px); border-color:var(--cyan); box-shadow:0 14px 28px rgba(0,0,0,0.4);}
.ph-card-top{padding:22px 18px 14px; font-size:36px; background:var(--panel-2); border-bottom:1px solid var(--line); text-align:center;}
.ph-card-body{padding:16px 18px 18px; display:flex; flex-direction:column; gap:8px; flex:1;}
.ph-card-body h3{font-family:'Space Grotesk',sans-serif; font-size:15.5px; margin:0;}
.ph-card-body p{color:var(--muted); font-size:13px; line-height:1.5; margin:0; flex:1;}
.ph-card-meta{display:flex; align-items:center; gap:8px; flex-wrap:wrap; font-size:11.5px; color:var(--muted); font-family:'JetBrains Mono',monospace;}
.ph-diff{display:inline-flex; align-items:center; gap:4px; padding:2px 8px; border-radius:6px; background:var(--ink); border:1px solid var(--line);}
.ph-tags{display:flex; gap:6px; flex-wrap:wrap;}
.ph-tag{font-size:10.5px; font-family:'JetBrains Mono',monospace; color:var(--cyan); background:rgba(95,208,222,0.08); border:1px solid rgba(95,208,222,0.25); border-radius:5px; padding:2px 7px;}
.ph-card-cta{margin-top:6px; text-align:center;}
.ph-lock-badge{font-size:11px; color:var(--muted); font-family:'JetBrains Mono',monospace;}

.ph-filters{display:flex; gap:10px; flex-wrap:wrap; align-items:center; padding:24px 0; border-bottom:1px solid var(--line); margin-bottom:24px;}
.ph-filter-pill{
  font-family:'JetBrains Mono',monospace; font-size:12.5px; padding:7px 14px; border-radius:20px;
  border:1px solid var(--line); color:var(--muted); text-decoration:none;
}
.ph-filter-pill.active{background:var(--amber); color:#1A1300; border-color:var(--amber);}
.ph-filter-pill:hover{border-color:var(--cyan); color:var(--text);}

.ph-detail-hero{padding:56px 0 32px; border-bottom:1px solid var(--line);}
.ph-detail-emoji{font-size:56px; display:block; margin-bottom:14px;}
.ph-detail-hero h1{font-family:'Space Grotesk',sans-serif; font-size:34px; margin:0 0 12px;}
.ph-detail-hero p.lead{color:var(--muted); font-size:15.5px; max-width:620px; line-height:1.6;}
.ph-stat-row{display:flex; gap:24px; flex-wrap:wrap; margin-top:18px;}
.ph-stat{font-size:13px; color:var(--muted); font-family:'JetBrains Mono',monospace;}
.ph-stat strong{color:var(--text); display:block; font-size:15px; font-family:'Space Grotesk',sans-serif;}

.ph-lang-switch{display:flex; flex-wrap:wrap; gap:8px; margin-top:20px;}
.ph-lang-pill{
  font-family:'JetBrains Mono',monospace; font-size:12.5px; padding:7px 14px; border-radius:20px;
  border:1px solid var(--line); background:var(--panel); color:var(--muted); text-decoration:none;
  transition:border-color .15s, color .15s;
}
.ph-lang-pill:hover{border-color:var(--cyan); color:var(--text);}
.ph-lang-pill.active{border-color:var(--cyan); color:var(--cyan); background:rgba(95,208,222,0.08);}

.ph-solution summary::-webkit-details-marker{display:none;}
.ph-solution summary:hover{color:var(--cyan);}

.ph-roadmap{display:flex; flex-wrap:wrap; gap:10px; align-items:center; padding:28px 0;}
.ph-roadmap-step{
  display:flex; align-items:center; gap:8px; font-family:'JetBrains Mono',monospace; font-size:12.5px;
  padding:8px 14px; border:1px solid var(--line); border-radius:20px; background:var(--panel); color:var(--muted);
}
.ph-roadmap-step .n{color:var(--amber); font-weight:700;}
.ph-roadmap-arrow{color:var(--line); font-size:16px;}

.ph-lock-panel{
  text-align:center; padding:48px 28px; border:1px dashed var(--line); border-radius:var(--radius);
  background:var(--panel); margin:24px 0;
}
.ph-lock-panel .icon{font-size:36px; display:block; margin-bottom:14px;}
.ph-lock-panel h3{font-family:'Space Grotesk',sans-serif; margin:0 0 8px;}
.ph-lock-panel p{color:var(--muted); font-size:14px; margin:0 0 20px;}

.ph-step{border:1px solid var(--line); border-radius:var(--radius); background:var(--panel); margin-bottom:16px; overflow:hidden;}
.ph-step-head{padding:16px 20px; display:flex; align-items:center; gap:12px; background:var(--panel-2); border-bottom:1px solid var(--line);}
.ph-step-head .num{
  width:28px; height:28px; border-radius:50%; background:var(--amber); color:#1A1300; font-weight:700;
  display:flex; align-items:center; justify-content:center; font-size:13px; flex:none;
}
.ph-step-head h3{font-family:'Space Grotesk',sans-serif; font-size:15.5px; margin:0;}
.ph-step-body{padding:18px 20px; font-size:14px; line-height:1.7; color:var(--text);}
.ph-step-body h4{font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--cyan); text-transform:uppercase; letter-spacing:0.05em; margin:16px 0 6px;}
.ph-step-body h4:first-child{margin-top:0;}
.ph-step-body pre{background:var(--ink); border:1px solid var(--line); border-radius:8px; padding:14px; overflow-x:auto; font-family:'JetBrains Mono',monospace; font-size:13px;}
.ph-detail-hero + .wrap > pre{background:var(--ink); border:1px solid var(--line); border-radius:8px; padding:16px 18px; overflow-x:auto; font-family:'JetBrains Mono',monospace; font-size:13px; margin:14px 0 20px;}
.ph-hint{margin-top:10px;}
.ph-hint summary{cursor:pointer; color:var(--amber); font-size:13px; font-family:'JetBrains Mono',monospace;}
.ph-hint-body{margin-top:8px; padding:12px 14px; background:rgba(240,180,41,0.06); border-radius:8px; font-size:13.5px; color:var(--text);}

.ph-downloads{display:flex; gap:12px; flex-wrap:wrap; margin:24px 0;}
.ph-better-list{display:grid; grid-template-columns:repeat(2,1fr); gap:10px; margin:18px 0;}
.ph-better-item{padding:12px 16px; background:var(--panel); border:1px solid var(--line); border-radius:8px; font-size:13.5px;}

.ph-surprise-wrap{max-width:560px; margin:0 auto; padding:80px 28px; text-align:center;}
.ph-surprise-card{border:1px solid var(--line); border-radius:var(--radius); background:var(--panel); padding:40px 28px; margin-top:24px;}
.ph-surprise-card .emoji{font-size:52px; display:block; margin-bottom:16px;}

/* ---------- RESPONSIVE ---------- */
@media (max-width:920px){
  .hero-grid, .course-hero-grid{grid-template-columns:1fr;}
  h1.hero-h{font-size:38px;}
  .course-panel.active{grid-template-columns:1fr;}
  .mastery-grid{grid-template-columns:repeat(2,1fr);}
  .plans{grid-template-columns:repeat(2,1fr);}
  .feat-grid{grid-template-columns:repeat(2,1fr);}
  .foot-grid{grid-template-columns:repeat(2,1fr);}
  .marketplace-strip{grid-template-columns:1fr;}
  .dash-grid{grid-template-columns:1fr;}
  .ph-category-grid{grid-template-columns:repeat(2,1fr);}
  .ph-grid{grid-template-columns:repeat(2,1fr);}
  .ph-better-list{grid-template-columns:1fr;}
  .ph-hero h1{font-size:32px;}

  .nav-toggle{display:flex;}
  .nav-menu{
    display:none; position:absolute; top:69px; left:0; right:0;
    flex-direction:column; align-items:stretch; gap:18px;
    background:var(--panel); border-bottom:1px solid var(--line);
    padding:22px 24px 26px; box-shadow:0 16px 28px rgba(0,0,0,0.35); z-index:40;
  }
  .nav-menu.open{display:flex;}
  nav.links{display:flex; flex-direction:column; gap:16px; font-size:15px;}
  .nav-search{max-width:none; order:-1;}
  .nav-cta{flex-wrap:wrap; gap:10px;}
}
@media (max-width:560px){
  .mastery-grid, .plans, .feat-grid, .foot-grid{grid-template-columns:1fr;}
  .stat-row{gap:20px;}
  h1.hero-h{font-size:30px;}
  .course-hero h1{font-size:26px;}
  .playground-bar{flex-wrap:wrap; row-gap:8px;}
  .foot-bottom{flex-direction:column; align-items:flex-start;}
  .ph-category-grid, .ph-grid{grid-template-columns:1fr;}
  .ph-detail-hero h1{font-size:26px;}
  .ph-roadmap{gap:6px;}
}

a:focus-visible, button:focus-visible, .btn:focus-visible, .tab:focus-visible, input:focus-visible{
  outline:2px solid var(--cyan); outline-offset:2px;
}