*{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#0b0f14;--panel:rgba(255,255,255,.065);--panel-strong:rgba(255,255,255,.12);--text:#f7fafc;--muted:#a7b0bd;--line:rgba(255,255,255,.14);--blue:#5ea2ff;--cyan:#46d9c5;--green:#77e5a8;--red:#ff7474;--gold:#f4c95d;--radius:8px}
html{scroll-behavior:smooth}
body{min-height:100vh;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;background:linear-gradient(180deg,#0f151d 0%,var(--bg) 38%,#090c10 100%);color:var(--text);overflow-x:hidden}
body[data-theme="light"]{--bg:#f4f7fb;--panel:rgba(255,255,255,.78);--panel-strong:rgba(12,22,35,.09);--text:#142033;--muted:#5c697a;--line:rgba(20,32,51,.13);--blue:#2368d8;--cyan:#008b7f;--green:#16865b;--red:#c93333;--gold:#8b6500;background:linear-gradient(180deg,#eef6ff 0%,#f8fbff 42%,#eef2f6 100%)}
.page-glow{position:fixed;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:44px 44px;mask-image:linear-gradient(to bottom,black,transparent 72%)}
.nav{position:sticky;top:0;z-index:100;width:min(980px,calc(100% - 32px));margin:16px auto 0;padding:12px 14px;display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);border-radius:12px;background:color-mix(in srgb,var(--bg) 84%,transparent);backdrop-filter:blur(16px)}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-weight:800}
.brand-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:8px;background:linear-gradient(135deg,var(--cyan),var(--blue));color:#071017;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.85rem}
nav{display:flex;align-items:center;gap:8px}
nav a{color:var(--muted);text-decoration:none;padding:10px 13px;border-radius:999px;transition:.2s ease}
nav a:hover,.nav-cta{color:var(--text);background:var(--panel)}
.menu-btn{display:none;border:none;color:white;background:var(--panel);border-radius:8px;padding:10px 12px;font-size:1.1rem}
.hero{min-height:calc(100vh - 80px);width:min(1080px,calc(100% - 32px));margin:0 auto;display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;padding:72px 0}
.eyebrow{color:var(--gold);font-weight:800;letter-spacing:0;text-transform:uppercase;font-size:.78rem;margin-bottom:14px}
h1{font-size:clamp(2.35rem,6vw,4.8rem);line-height:1;letter-spacing:0;max-width:900px}
h2{font-size:clamp(2rem,5vw,3.2rem);line-height:1.05;letter-spacing:0;margin-bottom:14px}
h3{font-size:1.25rem;margin-bottom:12px}
.hero-text,.section-heading p,.split p,.project-card p,.course-card p,.glass-panel p,.results-box p{color:var(--muted);font-size:1.05rem}
.hero-text{max-width:700px;margin:24px 0}
.hero-actions,.result-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn,.course-card button{border:none;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;width:fit-content;min-height:46px;padding:13px 20px;border-radius:8px;font-weight:800;text-decoration:none;transition:.2s ease}
.primary{color:#06101c;background:linear-gradient(135deg,var(--cyan),var(--blue));box-shadow:0 0 35px rgba(70,217,197,.16)}
.ghost{color:var(--text);background:var(--panel);border:1px solid var(--line)}
.danger{color:var(--text);background:rgba(255,116,116,.12);border:1px solid rgba(255,116,116,.35)}
.btn:hover,.course-card button:hover{transform:translateY(-2px)}
.hero-card{padding:1px;border-radius:10px;background:linear-gradient(135deg,rgba(70,217,197,.8),rgba(94,162,255,.65))}
.terminal{min-height:340px;border-radius:9px;padding:18px;background:rgba(5,7,11,.96);border:1px solid rgba(255,255,255,.12);box-shadow:0 34px 80px rgba(0,0,0,.38)}
.terminal-top{display:flex;gap:8px;margin-bottom:28px}
.terminal-top span{width:13px;height:13px;border-radius:50%;background:var(--panel-strong)}
pre{white-space:pre-wrap;color:#d9efff;font-size:1rem;line-height:1.7}
.section{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:90px 0}
.section-heading{max-width:730px;margin-bottom:32px}
.grid{display:grid;gap:18px}
.cards,.course-grid{grid-template-columns:repeat(3,1fr)}
.project-card,.course-card,.quiz-panel,.lesson-box,.glass-panel,.results-box,.recommend-panel,.settings-panel,.weak-panel,.account-strip{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);backdrop-filter:blur(14px);padding:24px}
.glass-panel p+p{margin-top:14px}
.project-card,.course-card{min-height:230px}
.project-tag,.status-pill{width:fit-content;padding:7px 10px;border-radius:999px;background:rgba(70,217,197,.12);color:var(--cyan);font-size:.8rem;font-weight:900;margin-bottom:18px}
.status-pill{display:inline-block;margin-top:20px;margin-bottom:0;color:#10130b;background:rgba(244,201,93,.92)}
.split{display:grid;grid-template-columns:.8fr 1.2fr;gap:28px;align-items:start}
.skill-cloud,.soon-grid{display:flex;flex-wrap:wrap;gap:12px}
.skill-cloud span,.soon-grid span{padding:12px 16px;border-radius:999px;color:var(--text);background:var(--panel);border:1px solid var(--line);font-weight:800}
.course-card button{margin-top:20px;color:#071017;background:linear-gradient(135deg,var(--cyan),var(--blue))}
.recommend-panel{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px}
.recommend-panel h3{margin-bottom:8px}
.recommend-panel p:last-child{color:var(--muted)}
.lesson-box{position:relative;margin-top:20px}
.lesson-steps{display:grid;gap:10px;margin-top:18px;padding-left:18px;color:var(--muted)}
.hidden{display:none!important}
.close-btn{position:absolute;top:14px;right:14px;border:none;border-radius:50%;width:34px;height:34px;color:white;background:var(--panel-strong);cursor:pointer}
.quiz-panel{max-width:980px}
.quiz-panel label{display:block;font-weight:800;margin-bottom:10px}
select,input{width:100%;padding:14px 16px;margin-bottom:16px;border-radius:8px;border:1px solid var(--line);color:var(--text);background:color-mix(in srgb,var(--bg) 86%,white 14%);outline:none}
.account-strip{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px;padding:16px}
.account-strip span{display:block;color:var(--text);font-weight:900}
.account-strip small{display:block;color:var(--muted);margin-top:4px}
.quiz-controls{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;margin-bottom:8px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:10px 0 18px}
.stats-grid div{border:1px solid var(--line);border-radius:8px;background:rgba(255,255,255,.045);padding:16px}
.stats-grid span{display:block;color:var(--text);font-size:1.45rem;font-weight:900;line-height:1}
.stats-grid small{display:block;color:var(--muted);font-weight:800;margin-top:8px;text-transform:uppercase}
.weak-panel{padding:16px;margin-bottom:18px}
.weak-panel strong{display:block;margin-bottom:6px}
.weak-panel p,.auth-message{color:var(--muted)}
.quiz-box{margin-top:24px}
.quiz-top{display:flex;justify-content:space-between;color:var(--muted);margin-bottom:18px}
.answers{display:grid;gap:10px;margin:18px 0}
.answers button{text-align:left;padding:14px;color:white;background:rgba(255,255,255,.08);border:1px solid var(--line);border-radius:8px;cursor:pointer}
.answers button:disabled{cursor:default;opacity:.82}
.answers button.correct{border-color:var(--green);background:rgba(119,229,168,.14)}
.answers button.wrong{border-color:var(--red);background:rgba(255,116,116,.14)}
#feedback{color:var(--muted);margin-bottom:14px}
.quiz-actions{display:flex;gap:12px;flex-wrap:wrap}
.results-box{margin-top:24px}
.review-list{display:grid;gap:12px;margin:20px 0}
.review-item{border:1px solid var(--line);border-radius:8px;padding:16px;background:rgba(255,255,255,.055)}
.review-item strong{display:block;margin-bottom:8px}
.review-question{color:var(--text);margin-bottom:8px}
.review-item .wrong-text{color:var(--red)}
.review-item .correct-text{color:var(--green)}
.review-item .explain{color:var(--muted);margin-top:8px}
.soon-grid{justify-content:center;margin-top:24px}
.settings-panel{display:grid;gap:18px}
.setting-row{display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding-bottom:18px}
.setting-row h3,.feature-list h3{margin-bottom:6px}
.setting-row p{color:var(--muted)}
.theme-toggle{display:flex;gap:8px;padding:6px;border:1px solid var(--line);border-radius:10px;background:var(--panel-strong)}
.theme-toggle button{border:none;border-radius:8px;padding:10px 14px;color:var(--muted);background:transparent;font-weight:900;cursor:pointer}
.theme-toggle button.active{color:#06101c;background:linear-gradient(135deg,var(--cyan),var(--blue))}
.auth-card{border:1px solid var(--line);border-radius:8px;background:color-mix(in srgb,var(--panel) 80%,var(--panel-strong));padding:18px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:18px}
.auth-copy h3{margin-bottom:6px}
#profileMode{display:flex;align-items:center;gap:10px;color:var(--muted)}
.profile-avatar{width:30px;height:30px;border-radius:50%}
.google-login{position:relative;color:var(--text);background:var(--panel);border:1px solid var(--line);padding-left:46px}
.google-login:before{content:"G";position:absolute;left:16px;display:grid;place-items:center;width:20px;height:20px;border-radius:50%;background:#fff;color:#2563eb;font-weight:900}
.google-button-wrap{min-height:44px;display:flex;align-items:center;justify-content:flex-end}
.auth-message{grid-column:1/-1;margin-top:-4px;color:var(--muted);font-size:.95rem}
footer{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:28px 0 45px;border-top:1px solid var(--line);color:var(--muted);text-align:center}
footer p:first-child{color:var(--text);font-weight:900;margin-bottom:8px}
@media(max-width:950px){.hero,.split{grid-template-columns:1fr}.cards,.course-grid{grid-template-columns:1fr 1fr}.quiz-controls{grid-template-columns:1fr}.hero{padding-top:55px}}
@media(max-width:700px){.menu-btn{display:block}nav{display:none;position:absolute;top:68px;right:0;left:0;flex-direction:column;padding:16px;border:1px solid var(--line);border-radius:8px;background:color-mix(in srgb,var(--bg) 96%,transparent)}nav.open{display:flex}nav a{width:100%;text-align:center}.cards,.course-grid,.stats-grid,.auth-card{grid-template-columns:1fr}.terminal{min-height:245px}.hero-actions,.result-actions,.quiz-actions,.recommend-panel,.account-strip,.setting-row{flex-direction:column;align-items:stretch}.google-button-wrap{justify-content:flex-start}.btn,.course-card button{width:100%}.section{padding:70px 0}.nav{border-radius:8px}.brand span:last-child{font-size:.95rem}}