/* DF717 Analyst Academy — bright & refreshing theme */
:root{
  --bg:#F5FAFF; --surface:#FFFFFF; --surface-2:#EEF6FF; --line:#DCE8F5;
  --text:#14253A; --muted:#5B7290;
  --primary:#1E7BF2; --primary-2:#0F5FD1; --primary-soft:#E3EFFF;
  --mint:#16B981; --mint-soft:#E0F8EF; --coral:#F25C5C; --coral-soft:#FFE7E7;
  --sun:#F5B700; --sun-soft:#FFF5CC; --violet:#7C5CFF; --violet-soft:#EFEBFF;
  --radius:16px; --shadow:0 6px 24px rgba(30,123,242,.08);
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;font-size:16px}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
button{font-family:inherit}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .5em}
h1{font-size:2rem;font-weight:800;letter-spacing:-.02em}
h2{font-size:1.45rem;font-weight:700}
h3{font-size:1.15rem;font-weight:700}
p{margin:.4em 0 .9em}
code{font-family:var(--mono);background:var(--surface-2);padding:.1em .4em;border-radius:6px;font-size:.92em}
pre{background:#0F1E33;color:#E6F0FF;padding:14px 16px;border-radius:12px;overflow:auto;font-size:.9rem;line-height:1.5}
pre code{background:transparent;color:inherit;padding:0}
table{border-collapse:collapse;width:100%;margin:.6em 0 1.2em;font-size:.95rem;background:var(--surface)}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--primary-soft);font-weight:700}
blockquote{margin:.8em 0;padding:12px 16px;border-left:5px solid var(--violet);background:var(--violet-soft);border-radius:0 12px 12px 0}
hr{border:0;border-top:1px solid var(--line);margin:1.4em 0}

/* layout */
.app{display:grid;grid-template-columns:300px 1fr;min-height:100vh}
.sidebar{background:var(--surface);border-right:1px solid var(--line);padding:18px 14px;position:sticky;top:0;height:100vh;overflow:auto}
.brand{display:flex;align-items:center;gap:10px;padding:6px 8px 16px}
.brand .logo{width:38px;height:38px;border-radius:12px;background:#fff;border:1px solid var(--line);display:grid;place-items:center;overflow:hidden;flex:none}
.brand .logo img{width:30px;height:30px;object-fit:contain}
.brand .word{display:block;height:20px;width:auto;margin-bottom:3px}
.brand small{color:var(--muted);display:block;line-height:1.1}
.hero .word{height:34px;width:auto;display:block;margin-bottom:14px}
.login-wrap{max-width:460px;margin:40px auto}
.login-wrap .logo-big{width:72px;height:72px;border-radius:20px;background:#fff;border:1px solid var(--line);display:grid;place-items:center;margin:0 auto 14px}
.login-wrap .logo-big img{width:56px;height:56px;object-fit:contain}
.seg{display:inline-flex;border:1.5px solid var(--line);border-radius:12px;overflow:hidden}
.seg button{border:0;background:var(--surface);padding:8px 16px;font-weight:600;cursor:pointer;color:var(--muted)}
.seg button.on{background:var(--primary-soft);color:var(--primary-2)}
.online-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--mint);margin-right:6px}
.feed li{display:block;padding:6px 10px;border-bottom:1px solid var(--line);font-size:.88rem}
.feed li:last-child{border-bottom:0}
.feed time{color:var(--muted);margin-right:8px;font-family:var(--mono);font-size:.78rem}
.matrix th,.matrix td{padding:6px 8px;font-size:.88rem;vertical-align:middle}
.matrix .pill{min-width:38px;text-align:center}
.user-row{cursor:pointer}
.user-row:hover td{background:var(--surface-2)}
.bar{height:8px;background:#E4ECF6;border-radius:999px;overflow:hidden;min-width:90px}
.bar i{display:block;height:100%;background:var(--primary);border-radius:999px}
.nav-section{margin:10px 0 4px;padding:0 8px;font-size:.72rem;font-weight:700;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
.nav a{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:10px;color:var(--text);font-weight:500}
.nav a:hover{background:var(--surface-2);text-decoration:none}
.nav a.active{background:var(--primary-soft);color:var(--primary-2);font-weight:700}
.nav .week{margin-top:6px}
.nav .week > a{font-weight:700}
.nav .mods{margin-left:14px;border-left:2px solid var(--line);padding-left:6px}
.nav .mods a{font-size:.9rem;padding:6px 8px}
.tick{width:18px;height:18px;border-radius:50%;border:2px solid var(--line);display:inline-grid;place-items:center;font-size:.7rem;flex:none}
.tick.done{background:var(--mint);border-color:var(--mint);color:#fff}
.tick.part{border-color:var(--sun);background:var(--sun-soft)}
.main{padding:28px 36px 80px;max-width:1100px;width:100%}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.menu-btn{display:none}
.crumbs{color:var(--muted);font-size:.9rem}
.crumbs a{color:var(--muted)}
.user-chip{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 12px 6px 8px;font-size:.9rem}
.avatar{width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,var(--violet),var(--primary));color:#fff;display:grid;place-items:center;font-weight:700;font-size:.8rem}

/* components */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow);margin-bottom:18px}
.card.soft{background:var(--surface-2);box-shadow:none}
.grid{display:grid;gap:16px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
.hero{background:linear-gradient(120deg,#E7F1FF 0%,#E4FBF1 60%,#FFF8E1 100%);border-radius:24px;padding:36px 40px;margin-bottom:24px;border:1px solid #D6E8FF;position:relative;overflow:hidden}
.hero h1{font-size:2.4rem;margin-bottom:.3em}
.hero p.lead{font-size:1.1rem;color:#2A4664;max-width:720px}
.pill{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.78rem;font-weight:700;letter-spacing:.02em}
.pill.blue{background:var(--primary-soft);color:var(--primary-2)}
.pill.mint{background:var(--mint-soft);color:#0B7A55}
.pill.coral{background:var(--coral-soft);color:#B32B2B}
.pill.sun{background:var(--sun-soft);color:#8A6500}
.pill.violet{background:var(--violet-soft);color:#4E36C9}
.pill.grey{background:#EEF1F5;color:var(--muted)}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;border:0;border-radius:12px;padding:10px 18px;font-weight:700;cursor:pointer;font-size:.95rem;transition:transform .08s,box-shadow .2s;box-shadow:0 6px 16px rgba(30,123,242,.25)}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn.secondary{background:var(--surface);color:var(--primary-2);border:1.5px solid var(--primary);box-shadow:none}
.btn.mint{background:var(--mint);box-shadow:0 6px 16px rgba(22,185,129,.25)}
.btn.ghost{background:transparent;color:var(--muted);box-shadow:none;border:1px solid var(--line)}
.btn.small{padding:6px 12px;font-size:.85rem;border-radius:10px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.spread{justify-content:space-between}
.progress{height:10px;background:#E4ECF6;border-radius:999px;overflow:hidden}
.progress > i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--mint));border-radius:999px;transition:width .4s}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.stat b{font-size:1.6rem;display:block;line-height:1.1}
.stat span{color:var(--muted);font-size:.85rem}
.tabs{display:flex;gap:6px;border-bottom:2px solid var(--line);margin-bottom:20px;flex-wrap:wrap}
.tabs a{padding:10px 16px;border-radius:12px 12px 0 0;color:var(--muted);font-weight:600;margin-bottom:-2px;border-bottom:2px solid transparent}
.tabs a.active{color:var(--primary-2);border-bottom-color:var(--primary);background:var(--primary-soft)}
.tabs a:hover{text-decoration:none;background:var(--surface-2)}
.list{list-style:none;padding:0;margin:0}
.list li{display:flex;align-items:center;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;margin-bottom:8px;background:var(--surface)}
.list li:hover{border-color:var(--primary)}
.list li .t{flex:1}
.list li .t b{display:block}
.list li .t small{color:var(--muted)}
.callout{border-radius:14px;padding:14px 18px;margin:14px 0;border:1px solid transparent}
.callout .label{font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;margin-bottom:4px;display:block}
.callout.tip{background:var(--mint-soft);border-color:#BDEFD9}.callout.tip .label{color:#0B7A55}
.callout.warn{background:var(--coral-soft);border-color:#F8C9C9}.callout.warn .label{color:#B32B2B}
.callout.script{background:var(--sun-soft);border-color:#F5E4A0;font-size:1.02rem}.callout.script .label{color:#8A6500}
.callout.example{background:var(--primary-soft);border-color:#C9DEFF}.callout.example .label{color:var(--primary-2)}
.callout.key{background:var(--violet-soft);border-color:#DDD6FF}.callout.key .label{color:#4E36C9}
.callout p:last-child{margin-bottom:0}
.video{position:relative;width:100%;aspect-ratio:16/9;background:#0F1E33;border-radius:14px;overflow:hidden;margin:10px 0 18px}
.video iframe,.video video{position:absolute;inset:0;width:100%;height:100%;border:0}
.keypoints{background:var(--surface-2);border-radius:14px;padding:16px 20px}
.keypoints ul{margin:.3em 0 0;padding-left:20px}

/* quiz */
.q{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px 24px;margin-bottom:14px}
.q .qt{font-weight:700;font-size:1.05rem;margin-bottom:12px}
.opt{display:flex;gap:12px;align-items:flex-start;padding:11px 14px;border:1.5px solid var(--line);border-radius:12px;margin-bottom:8px;cursor:pointer;background:var(--surface)}
.opt:hover{border-color:var(--primary);background:var(--primary-soft)}
.opt input{margin-top:4px}
.opt.correct{border-color:var(--mint);background:var(--mint-soft)}
.opt.wrong{border-color:var(--coral);background:var(--coral-soft)}
.opt.chosen{border-color:var(--primary)}
.explain{margin-top:10px;padding:12px 14px;border-radius:10px;background:var(--surface-2);font-size:.95rem}
.score-big{font-size:3rem;font-weight:900;letter-spacing:-.03em}
.pass{color:var(--mint)}.fail{color:var(--coral)}

/* forms */
textarea,input[type=text],input[type=number],input[type=email],input[type=password],select{font-family:inherit;font-size:.98rem;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;width:100%;background:var(--surface);color:var(--text)}
textarea{min-height:260px;line-height:1.55;resize:vertical}
textarea:focus,input:focus,select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
label.field{display:block;font-weight:600;margin:10px 0 4px;font-size:.9rem}
.check{display:flex;gap:10px;align-items:flex-start;padding:8px 10px;border-radius:10px;cursor:pointer}
.check:hover{background:var(--surface-2)}
.check input{margin-top:5px;width:18px;height:18px}
.check.done{text-decoration:line-through;color:var(--muted)}
.rubric li{margin-bottom:6px}
.muted{color:var(--muted)}
.small{font-size:.88rem}
.right{text-align:right}
.center{text-align:center}
.mono{font-family:var(--mono)}
.badge-row{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
.lab-svg{width:100%;height:auto;background:#fff;border:1px solid var(--line);border-radius:12px}
.inline-answer{display:flex;gap:8px;align-items:center;margin:6px 0;flex-wrap:wrap}
.inline-answer input{width:150px}
.inline-answer label{min-width:220px;font-weight:600}
.ok{color:#0B7A55;font-weight:700}.bad{color:#B32B2B;font-weight:700}
.toast{position:fixed;bottom:22px;right:22px;background:#14253A;color:#fff;padding:12px 18px;border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,.2);opacity:0;transform:translateY(10px);transition:all .25s;z-index:50}
.toast.show{opacity:1;transform:none}
.timer{font-family:var(--mono);font-size:1.4rem;font-weight:700}
.kbd{font-family:var(--mono);background:#EEF1F5;border:1px solid #D7DEE8;border-bottom-width:2px;border-radius:6px;padding:0 6px;font-size:.85em}
.module-head{display:flex;gap:18px;align-items:flex-start;justify-content:space-between;flex-wrap:wrap;margin-bottom:12px}
.lesson-nav{display:flex;justify-content:space-between;gap:12px;margin-top:24px;flex-wrap:wrap}
.trade-table{font-size:.85rem}
.trade-table td,.trade-table th{padding:4px 8px}
.neg{color:#B32B2B}.pos{color:#0B7A55}
.week-card{display:block;color:inherit;border:1px solid var(--line);background:var(--surface);border-radius:16px;padding:18px 20px;transition:border-color .2s,transform .1s}
.week-card:hover{text-decoration:none;border-color:var(--primary);transform:translateY(-2px)}
.week-card .n{font-size:.75rem;font-weight:800;color:var(--primary);letter-spacing:.08em}
.week-card h3{margin:.2em 0 .3em}
.week-card p{color:var(--muted);font-size:.9rem;margin:0 0 10px}
.footer-note{color:var(--muted);font-size:.8rem;margin-top:40px;border-top:1px solid var(--line);padding-top:14px}
/* figures */
figure.fig{margin:18px 0 22px;padding:14px 14px 10px;background:var(--surface);border:1px solid var(--line);border-radius:14px;position:relative}
.fig-svg{width:100%;height:auto;display:block;font-family:var(--font)}
.fig-svg text{font-family:var(--font)}
figcaption{font-size:.86rem;color:var(--muted);margin-top:8px;line-height:1.45}
.fig-legend{display:flex;gap:14px;flex-wrap:wrap;font-size:.82rem;color:var(--text);margin-bottom:6px}
.lk{display:inline-flex;align-items:center;gap:6px}
.lk i{display:inline-block;width:12px;height:12px;border-radius:3px}
.fig-tip{display:none;position:absolute;z-index:5;background:#14253A;color:#fff;font-size:.78rem;line-height:1.5;padding:8px 10px;border-radius:8px;pointer-events:none;min-width:150px;box-shadow:0 8px 24px rgba(0,0,0,.2)}
.fig-tip i{display:inline-block;width:9px;height:9px;border-radius:2px;margin-right:5px;vertical-align:middle}
.fig-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:10px}
.fig-grid3{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px}
.fig-cell{background:var(--surface-2);border-radius:10px;padding:8px}
.fig-cell b{display:block;font-size:.85rem;margin-top:4px}
.fig-cell small{display:block;font-size:.75rem;color:var(--muted);line-height:1.35}
.fig-mini{width:100%;height:auto;display:block;background:#fff;border-radius:6px}
details{border:1px solid var(--line);border-radius:12px;padding:10px 14px;margin:8px 0;background:var(--surface)}
summary{cursor:pointer;font-weight:600}
@media (max-width:980px){
  .app{grid-template-columns:1fr}
  .sidebar{position:fixed;left:0;top:0;width:290px;transform:translateX(-100%);transition:transform .25s;z-index:40;box-shadow:0 0 40px rgba(0,0,0,.2)}
  .sidebar.open{transform:none}
  .menu-btn{display:inline-flex}
  .main{padding:18px 16px 80px}
  .grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}
  .hero{padding:24px 20px}.hero h1{font-size:1.7rem}
}
@media print{.sidebar,.topbar,.btn{display:none}.main{padding:0}}