:root{
  --bg:#0a0c10;
  --bg-deep:#050608;
  --surface:rgba(17,20,25,.96);
  --surface-alt:rgba(255,255,255,.04);
  --border:rgba(255,255,255,.08);
  --text:#e7eaee;
  --muted:#95a1b0;
  --muted-dim:#5b6674;
  --accent:#3b82f6;
  --accent-gradient:linear-gradient(135deg,#3b82f6 0%,#7dd3fc 100%);
  --accent-soft:rgba(59,130,246,.16);
  --accent-dim:rgba(59,130,246,.08);
  --up:#22c55e;
  --down:#ef4444;
  --complete:#22c55e;
  --complete-soft:rgba(34,197,94,.14);
  --ink:#04070c;
  --mono:'Roboto Mono',monospace;
  --sans:'Inter',sans-serif;
  --title:'Space Grotesk','Inter',sans-serif;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:8px;
  --transition:all .3s cubic-bezier(.25,.8,.25,1);
}
h1,h2,h3,h4,h5,h6{font-family:var(--title);}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--text);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;}
::selection{background:var(--accent-soft);}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
img{max-width:100%;}

/* ---------- Layout ---------- */
.app{display:flex;min-height:100vh;}

/* Sidebar */
.sidebar{
  width:312px;flex-shrink:0;
  background:var(--surface);
  border-right:1px solid var(--border);
  height:100vh;position:sticky;top:0;
  display:flex;flex-direction:column;
  overflow:hidden;
}
.sidebar-header{padding:22px 22px 16px;border-bottom:1px solid var(--border);}
.brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.brand-mark{width:30px;height:30px;object-fit:contain;flex-shrink:0;}
.auth-card .brand-mark{width:44px;height:44px;}
.brand-name{font-family:var(--mono);font-weight:800;font-size:12.5px;letter-spacing:1.4px;}
.brand-sub{font-family:var(--mono);font-size:9.5px;color:var(--muted-dim);letter-spacing:.08em;text-transform:uppercase;margin-top:1px;}

.progress-wrap{margin-top:4px;}
.progress-label{display:flex;justify-content:space-between;align-items:baseline;font-family:var(--mono);font-size:11px;color:var(--muted);margin-bottom:7px;}
.progress-label b{color:var(--text);font-weight:600;}
.progress-track{height:4px;background:var(--border);border-radius:2px;overflow:hidden;}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--up));border-radius:2px;transition:width .5s cubic-bezier(.4,0,.2,1);}

.sidebar-nav{flex:1;overflow-y:auto;padding:10px 0 18px;}
.sidebar-nav::-webkit-scrollbar{width:6px;}
.sidebar-nav::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px;}

.home-link{display:flex;align-items:center;gap:10px;margin:2px 14px 10px;padding:9px 10px;border-radius:8px;font-size:13px;font-weight:600;color:var(--muted);}
.home-link:hover,.home-link.active{background:var(--surface-alt);color:var(--text);}

.module-group{margin-bottom:6px;}
.module-title{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--muted-dim);padding:14px 22px 6px;
}
.module-badge{
  font-family:var(--mono);font-size:9px;padding:2px 7px;border-radius:20px;
  background:rgba(255,255,255,.06);color:var(--muted);letter-spacing:.05em;
}
.module-badge.soon{color:var(--accent);background:var(--accent-dim);}

.lesson-row{
  display:flex;align-items:center;gap:10px;
  padding:8px 22px 8px 16px;margin:0 6px;border-radius:7px;
  font-size:13px;color:var(--muted);position:relative;
  border-left:2px solid transparent;
}
.lesson-row:hover{background:var(--surface-alt);color:var(--text);}
.lesson-row.active{background:var(--accent-dim);color:var(--text);border-left:2px solid var(--accent);}
.lesson-dot{
  width:16px;height:16px;border-radius:50%;flex-shrink:0;
  border:1.5px solid var(--muted-dim);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:9px;color:var(--muted-dim);
}
.lesson-row.done .lesson-dot{background:var(--complete-soft);border-color:var(--complete);color:var(--complete);}
.lesson-row.done .lesson-dot::before{content:'\2713';}
.lesson-row:not(.done) .lesson-dot::before{content:attr(data-n);}

.module-soon-note{padding:6px 22px 10px 40px;font-size:12px;color:var(--muted-dim);line-height:1.5;}

/* Main content */
.main{flex:1;min-width:0;display:flex;justify-content:center;}
.content-wrap{width:100%;max-width:760px;padding:48px 40px 100px;}

.eyebrow{font-family:var(--mono);font-size:11.5px;color:var(--muted);letter-spacing:.04em;margin-bottom:10px;display:flex;align-items:center;gap:8px;}
.eyebrow .sep{color:var(--muted-dim);}
.lesson-h1{font-size:30px;font-weight:700;line-height:1.25;margin-bottom:22px;letter-spacing:-.01em;}

/* Audio player */
.audio-player{
  display:flex;align-items:center;gap:14px;
  background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:12px 16px;margin-bottom:26px;
}
.audio-play-btn{
  width:36px;height:36px;border-radius:50%;background:var(--accent);color:var(--ink);
  display:flex;align-items:center;justify-content:center;font-size:13px;flex-shrink:0;
}
.audio-info{flex:1;min-width:0;}
.audio-label{font-size:11px;color:var(--muted);margin-bottom:6px;font-family:var(--mono);}
.audio-track{height:5px;background:var(--border);border-radius:3px;cursor:pointer;position:relative;}
.audio-track-fill{height:100%;background:var(--accent);border-radius:3px;width:0%;}
.audio-time{font-family:var(--mono);font-size:11px;color:var(--muted-dim);flex-shrink:0;}
.audio-unavailable{
  font-family:var(--mono);font-size:12px;color:var(--muted-dim);
  background:var(--surface-alt);border:1px dashed var(--border);border-radius:var(--radius-md);
  padding:12px 16px;margin-bottom:26px;
}

/* Chart */
.chart-panel{
  position:relative;
  background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:14px 14px 4px;margin:8px 0 28px;
}
.chart-fullscreen-btn{
  position:absolute;top:10px;right:10px;z-index:5;
  width:30px;height:30px;border-radius:8px;
  border:1px solid var(--border);background:rgba(10,12,16,.7);color:var(--muted);
  font-size:15px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;
}
.chart-fullscreen-btn:hover{color:var(--text);border-color:var(--muted-dim);}
.chart-panel.is-fullscreen{
  position:fixed;inset:0;z-index:1000;margin:0;border-radius:0;
  padding:16px;background:var(--bg);overflow:auto;
}
.chart-panel.is-fullscreen .chart-canvas{height:calc(100vh - 130px) !important;}
.chart-panel.is-fullscreen .tv-widget-mount{height:calc(100vh - 90px) !important;}
body.chart-fullscreen-open{overflow:hidden;}
.chart-head{display:flex;align-items:baseline;gap:10px;padding:2px 4px 10px;}
.chart-symbol{font-family:var(--mono);font-weight:700;font-size:13px;letter-spacing:.03em;}
.chart-tf{font-family:var(--mono);font-size:10.5px;color:var(--muted-dim);text-transform:uppercase;letter-spacing:.05em;}
.chart-canvas{width:100%;height:380px;}
.chart-legend{display:flex;gap:14px;padding:6px 6px 10px;flex-wrap:wrap;}
.legend-item{display:flex;align-items:center;gap:6px;font-family:var(--mono);font-size:11px;color:var(--muted);}
.legend-item i{width:10px;height:2px;display:inline-block;border-radius:1px;}
.chart-loading,.chart-error{padding:60px 0;text-align:center;color:var(--muted-dim);font-family:var(--mono);font-size:12px;}

/* Live market panel */
.live-panel{margin-bottom:28px;}
.practice-panel{margin:24px 0 28px;}
.live-head{display:flex;align-items:center;gap:14px;padding:2px 6px 12px;flex-wrap:wrap;}
.live-title{
  display:flex;align-items:center;gap:8px;
  font-family:var(--mono);font-weight:700;font-size:13px;letter-spacing:.03em;color:var(--text);
}
.live-dot{
  width:8px;height:8px;border-radius:50%;background:var(--up);
  box-shadow:0 0 0 0 rgba(34,197,94,.6);
  animation:live-pulse 1.6s infinite;
}
@keyframes live-pulse{
  0%{box-shadow:0 0 0 0 rgba(34,197,94,.55);}
  70%{box-shadow:0 0 0 7px rgba(34,197,94,0);}
  100%{box-shadow:0 0 0 0 rgba(34,197,94,0);}
}
.tv-widget-mount{width:100%;height:520px;border-radius:calc(var(--radius-md) - 4px);overflow:hidden;}
@media (max-width:880px){.tv-widget-mount{height:420px;}}

/* Lesson body text */
.lesson-body{font-size:15.5px;line-height:1.75;color:var(--text);}
.lesson-body h3{font-size:17px;margin:26px 0 10px;color:var(--text);}
.lesson-body p{margin-bottom:14px;color:#c7ccd3;}
.lesson-body ul{margin:0 0 16px 20px;color:#c7ccd3;}
.lesson-body li{margin-bottom:6px;}
.lesson-body strong{color:var(--text);font-weight:600;}
.lesson-body em{color:var(--muted);}

.lesson-nav{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:40px;padding-top:24px;border-top:1px solid var(--border);}
.nav-btn{
  font-size:13px;font-weight:600;color:var(--muted);padding:9px 14px;border-radius:8px;
  display:flex;align-items:center;gap:6px;border:1px solid var(--border);
}
.nav-btn:hover:not(.disabled){background:var(--surface-alt);color:var(--text);}
.nav-btn.disabled{opacity:.35;pointer-events:none;}
.complete-btn{
  font-size:13px;font-weight:700;padding:10px 18px;border-radius:8px;
  background:var(--accent);color:var(--ink);flex-shrink:0;
}
.complete-btn.is-done{background:var(--complete-soft);color:var(--complete);border:1px solid var(--complete);}

/* Home / module overview */
.home-hero{padding:8px 0 30px;}
.home-title{font-size:32px;font-weight:700;letter-spacing:-.01em;margin-bottom:10px;}
.home-sub{color:var(--muted);font-size:15px;line-height:1.6;max-width:560px;}
.module-cards{display:flex;flex-direction:column;gap:14px;margin-top:28px;}
.module-card{
  border:1px solid var(--border);border-radius:var(--radius-md);padding:20px 22px;
  background:var(--surface-alt);
}
.module-card-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px;}
.module-card-title{font-size:17px;font-weight:700;}
.module-card-desc{color:var(--muted);font-size:13.5px;line-height:1.6;}
.module-card-cta{margin-top:14px;font-family:var(--mono);font-size:12px;color:var(--accent);}

/* Auth screens */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;}
.auth-card{width:100%;max-width:380px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:34px 30px;}
.auth-card .brand{justify-content:center;margin-bottom:22px;}
.auth-title{font-size:20px;font-weight:700;text-align:center;margin-bottom:6px;}
.auth-sub{text-align:center;color:var(--muted-dim);font-size:12.5px;margin-bottom:24px;}
.field{margin-bottom:14px;}
.field label{display:block;font-size:11.5px;color:var(--muted);margin-bottom:6px;font-family:var(--mono);}
.field input{
  width:100%;padding:11px 12px;border-radius:9px;border:1px solid var(--border);
  background:var(--bg-deep);color:var(--text);font-size:14px;
}
.field input:focus{border-color:var(--accent);}
.auth-submit{
  width:100%;padding:12px;border-radius:9px;background:var(--accent);color:var(--ink);
  font-weight:700;font-size:14px;margin-top:6px;
}
.auth-error{color:var(--down);font-size:12.5px;margin-top:10px;text-align:center;}
.auth-switch{text-align:center;font-size:12.5px;color:var(--muted-dim);margin-top:18px;}
.auth-switch button{color:var(--accent);font-weight:600;}

/* Mobile */
.mobile-topbar{display:none;}
@media (max-width:880px){
  .sidebar{position:fixed;left:0;top:0;transform:translateX(-100%);z-index:40;transition:transform .25s ease;width:82vw;max-width:320px;}
  .sidebar.open{transform:translateX(0);}
  .app{display:block;}
  .mobile-topbar{
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 18px;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--bg);z-index:20;
  }
  .main{display:block;}
  .content-wrap{padding:28px 20px 80px;}
  .chart-canvas{height:300px;}
}