/* EasyLearnSpace: dark, technical, matching the animated lessons. Display face for headings, Plex for reading, Plex Mono for labels and data. */
:root{
  --bg:#0b111c; --bg2:#0f1726; --panel:#141e30; --panel2:#1a2740; --line:#26344d; --fg:#e8eef8; --muted:#8d9bb3; --dim:#59677f;
  --accent:#7cb4ff; --c:#7cb4ff; --green:#45d19b; --amber:#f2b84b; --red:#ff6b6b; --body:#c9d3e3;
  --display:"Bricolage Grotesque","IBM Plex Sans",system-ui,sans-serif;
  --sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--sans);font-size:16px;line-height:1.55}
a{color:inherit}
img{max-width:100%}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

.shell{max-width:1080px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}

/* top bar */
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .shell{display:flex;align-items:center;gap:18px;height:60px}
.brand{display:flex;align-items:center;gap:8px;text-decoration:none;font-family:var(--display);font-weight:700;font-size:21px;letter-spacing:-.01em}
.brand .n{font-family:var(--mono);font-weight:500;font-size:13px;background:var(--accent);color:var(--bg);border-radius:6px;padding:1px 6px;letter-spacing:0}
.nav{display:flex;gap:2px;margin-left:auto;flex-wrap:nowrap;white-space:nowrap;min-width:0;overflow-x:auto;scrollbar-width:none}.nav::-webkit-scrollbar{display:none}
.nav a{text-decoration:none;font-size:14px;color:var(--muted);padding:6px 8px;border-radius:8px}
.nav a:hover{color:var(--fg);background:var(--panel)}
.nav a[aria-current="page"]{color:var(--fg);background:var(--panel2)}
@media (max-width:760px){.nav{display:none}}
.rs-pill{display:none!important}@media (max-width:760px){.rs-pill{display:inline-flex!important;padding-inline:10px;margin-left:auto!important;border-color:var(--accent)!important}.rs-pill+.jobs-pill{margin-left:6px}}
@media (max-width:440px){.top .shell{gap:8px}.rs-pill{padding-inline:8px!important}}
.top .l24-theme{margin-left:8px}
@media (max-width:760px){.top .l24-theme{margin-left:auto}}
.nav .nav-x{color:var(--fg)}
.nav .nav-x{display:none}  /* Start here and Glossary stay on the home page and lesson bars; the menu holds topics + Jobs */
@media (max-width:1180px) and (min-width:761px){.nav a{padding:6px 7px;font-size:13.5px}}
.cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.btn{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-weight:600;font-size:15px;border-radius:10px;padding:10px 16px;background:var(--accent);color:var(--bg);border:1px solid var(--accent)}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--fg);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--accent)}
.mod-h .cheat{flex:none;align-self:center;text-decoration:none;font-size:13.5px;font-weight:500;color:var(--c);border:1px solid color-mix(in srgb,var(--c) 45%,var(--line));border-radius:9px;padding:6px 11px;white-space:nowrap}
.mod-h .cheat:hover{background:var(--panel)}
@media (max-width:620px){.mod-h{flex-wrap:wrap}.mod-h .cheat{margin-left:0}}

/* hero */
.hero{padding-block:64px 36px}
.eyebrow{font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.hero h1{font-family:var(--display);font-weight:700;font-size:clamp(36px,6vw,64px);line-height:1.02;letter-spacing:-.025em;margin:12px 0 16px;max-width:15ch;text-wrap:balance}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p{font-size:18px;color:var(--muted);max-width:56ch;margin:0}
.pipe{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:28px;font-family:var(--mono);font-size:13px;color:var(--muted)}
.pipe span{border:1px solid var(--line);border-radius:999px;padding:4px 12px;background:var(--bg2)}
.pipe i{font-style:normal;color:var(--dim)}

.search{margin-top:30px;display:flex;align-items:center;gap:10px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:0 14px;max-width:560px}
.search:focus-within{border-color:var(--accent)}
.search svg{flex:none;color:var(--dim)}
.search input{flex:1;min-width:0;background:transparent;border:0;outline:0;color:var(--fg);font:inherit;padding:13px 0}
.search input::placeholder{color:var(--dim)}

/* sections */
.sec{padding-block:28px}
.sec-h{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.sec-h h2{font-family:var(--display);font-size:26px;letter-spacing:-.01em;margin:0}
.sec-h .meta{font-size:14px;color:var(--muted)}

.topics{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
@media (max-width:1060px){.topics{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:760px){.topics{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.topics{grid-template-columns:1fr}}
.topic{--c:var(--accent);display:flex;flex-direction:column;gap:10px;text-decoration:none;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px;min-width:0;transition:border-color .2s,transform .2s}
.topic:hover{border-color:var(--c);transform:translateY(-2px)}
.glyph{display:flex;align-items:center;gap:4px;height:22px}
.glyph b{width:10px;height:10px;border-radius:50%;border:1.5px solid var(--c)}
.glyph b:nth-child(2){background:var(--c)}
.glyph i{width:14px;height:1.5px;background:var(--c);opacity:.6}
.topic h3{font-family:var(--display);font-size:21px;margin:0;letter-spacing:-.01em}
.topic p{margin:0;font-size:14.5px;color:var(--muted);flex:1}
.topic .count{font-family:var(--mono);font-size:12.5px;color:var(--c)}

/* lesson list */
.lessons{display:flex;flex-direction:column;gap:10px}
.lesson{--c:var(--accent);display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:16px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px;text-decoration:none;transition:border-color .2s}
a.lesson:hover{border-color:var(--c)}
.lesson .ix{font-family:var(--mono);font-size:13px;color:var(--c);width:28px;height:28px;border-radius:50%;border:1.5px solid var(--c);display:grid;place-items:center}
.lesson.done .ix{background:var(--c);color:var(--bg)}
.lesson h4{margin:0;font-size:16.5px;font-weight:600}
.lesson p{margin:2px 0 6px;font-size:14px;color:var(--muted)}
.tags{display:flex;gap:6px;flex-wrap:wrap}
.tag{font-family:var(--mono);font-size:11.5px;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:1px 7px}
.tag.t{color:var(--c);border-color:color-mix(in srgb,var(--c) 45%,var(--line))}
.side{display:flex;flex-direction:column;align-items:flex-end;gap:6px;font-size:13px;color:var(--muted);white-space:nowrap;font-variant-numeric:tabular-nums}
.pill{font-size:12px;font-weight:600;border-radius:999px;padding:2px 10px;background:var(--c);color:var(--bg)}
.lesson.soon{opacity:.55}
.lesson.soon .pill{background:transparent;color:var(--muted);border:1px solid var(--line);font-weight:500}
.lesson.done .pill::before{content:"✓ "}
@media (max-width:620px){.lesson{grid-template-columns:auto minmax(0,1fr)}.side{grid-column:2;flex-direction:row;align-items:center}}

.crumbs{font-size:14px;color:var(--muted);display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.crumbs a{text-decoration:none;color:var(--muted)}.crumbs a:hover{color:var(--fg)}
.topic-hero{padding-block:44px 18px}
.topic-hero h1{font-family:var(--display);font-size:clamp(32px,5vw,50px);letter-spacing:-.02em;margin:10px 0 8px}
.topic-hero p{color:var(--muted);font-size:17px;margin:0;max-width:60ch}
.progress{display:flex;align-items:center;gap:12px;margin-top:20px;font-size:14px;color:var(--muted)}
.progress .bar{flex:0 1 260px;height:8px;border-radius:4px;background:var(--panel2);overflow:hidden}
.progress .bar i{display:block;height:100%;width:0;background:var(--c);transition:width .4s}

.empty{color:var(--muted);font-size:15px;padding:18px;border:1px dashed var(--line);border-radius:12px}

footer{border-top:1px solid var(--line);margin-top:40px}
footer .shell{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-block:24px;font-size:14px;color:var(--muted)}
footer b{color:var(--fg);font-weight:600}
footer .links{display:flex;gap:14px}
footer .links a{color:var(--muted)}

@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* course modules */
.module{padding-block:14px}
.mod-h{display:flex;gap:14px;align-items:flex-start;margin-bottom:12px}
.mod-n{flex:none;font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--bg);background:var(--c);border-radius:8px;padding:5px 10px;margin-top:3px}
.mod-h h2{font-family:var(--display);font-size:22px;margin:0;letter-spacing:-.01em}
.mod-h p{margin:2px 0 0;font-size:14px;color:var(--muted)}

.quest-cta{display:flex;align-items:center;gap:14px;margin-top:18px;padding:14px 16px;border-radius:14px;text-decoration:none;color:var(--fg);border:1.5px solid var(--c);background:color-mix(in srgb,var(--c) 10%,var(--panel));transition:transform .15s}
.quest-cta:hover{transform:translateY(-2px)}
.quest-cta .qi{font-size:30px;line-height:1}
.quest-cta b{display:block;font-size:16px}
.quest-cta small{display:block;color:var(--muted);font-size:13.5px;margin-top:2px}
.quest-cta .go{margin-left:auto;flex:none;font-weight:700;color:var(--c)}

.jobs-pill{flex:none;display:inline-flex;align-items:center;gap:7px;font:600 13.5px var(--sans);padding:6px 12px;border-radius:999px;border:1.5px solid var(--green);color:var(--fg);text-decoration:none;margin-left:6px;white-space:nowrap}
.jobs-pill:hover,.jobs-pill[aria-current="page"]{background:color-mix(in srgb,var(--green) 16%,transparent)}
.jobs-pill .lv{width:8px;height:8px;border-radius:50%;background:var(--green);animation:jbp2 1.8s infinite}
@keyframes jbp2{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--green) 60%,transparent)}70%,100%{box-shadow:0 0 0 7px transparent}}
@media (prefers-reduced-motion:reduce){.jobs-pill .lv{animation:none}}
@media (max-width:760px){.jobs-pill{margin-left:auto}.top .l24-theme{margin-left:8px}}

/* company picker (interview questions) */
.co-wrap{margin-top:6px;margin-bottom:8px}
.co-pick{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 18px}
.co-h{display:flex;align-items:baseline;justify-content:space-between;gap:10px;flex-wrap:wrap}
.co-h h2{margin:0;font-size:20px}.co-n{font-size:13.5px;color:var(--muted)}
.co-row{display:flex;gap:8px;margin:12px 0 10px;flex-wrap:wrap}
.co-q{flex:1 1 240px;min-width:0;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--text);font:inherit;font-size:15px}
.co-sel{flex:0 1 220px;min-width:0;padding:10px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--text);font:inherit;font-size:14.5px}
.co-q:focus,.co-sel:focus{outline:2px solid var(--c);outline-offset:1px}
.co-sec,.co-chips{display:flex;flex-wrap:wrap;gap:6px}
.co-sec{margin-bottom:10px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:thin;padding-bottom:4px}
.co-sec button{flex:none}
.co-sec button,.co-chips button{font:inherit;font-size:13.5px;cursor:pointer;border:1px solid var(--line);background:transparent;color:var(--text);border-radius:999px;padding:5px 11px;display:inline-flex;gap:6px;align-items:center}
.co-sec button{font-size:12.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.co-sec button.on,.co-chips button.on{background:color-mix(in srgb,var(--c) 22%,transparent);border-color:var(--c);color:var(--text);font-weight:600}
.co-chips button i{font-style:normal;font-size:11.5px;opacity:.7;font-family:var(--mono)}
.co-chips{max-height:168px;overflow:auto}
.co-res{margin-top:12px;font-size:14.5px;color:var(--muted)}
.co-res b{color:var(--text)}
.co-clear{margin-left:8px;font:inherit;font-size:13px;cursor:pointer;border:1px solid var(--line);background:transparent;color:var(--text);border-radius:8px;padding:3px 9px}
.lesson[hidden],.module[hidden],.co-chips button[hidden]{display:none!important}

/* home "practise & grow" cards + header streak pill */
.home-eng{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}
.home-eng a{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:4px}
.home-eng a:hover{border-color:var(--accent)}.home-eng b{font-size:17px}.home-eng span{color:var(--muted);font-size:14px}.home-eng i{font-style:normal;font-size:26px}
.streak-pill{font-size:13.5px;font-weight:600;text-decoration:none;color:inherit;border:1px solid var(--line);border-radius:999px;padding:5px 10px;white-space:nowrap;margin-right:6px}