/* ── Dark theme (default) ──────────────────────────────────────── */
:root {
  --bg: #0a0a0a;
  --bg-elevated: #0e0e0e;
  --bg-secondary: #111111;
  --bg-tertiary: #1a1a1a;
  --bg-card: #161616;
  --bg-card-hover: #1c1c1e;
  --bg-input: #1c1c1e;
  --bg-input-focus: #2c2c2e;
  --accent: #E2FF2E;
  --accent-hover: #f0ff6a;
  --accent-soft: rgba(226,255,46,0.1);
  --accent-medium: rgba(226,255,46,0.18);
  --accent-text: #0a0a0a;
  --green: #30D158;
  --green-soft: rgba(48,209,88,0.1);
  --orange: #FF9F0A;
  --orange-soft: rgba(255,159,10,0.1);
  --pink: #FF375F;
  --pink-soft: rgba(255,55,95,0.1);
  --purple: #BF5AF2;
  --purple-soft: rgba(191,90,242,0.1);
  --teal: #64D2FF;
  --teal-soft: rgba(100,210,255,0.1);
  --text-primary: #f0f0f0;
  --text-secondary: #999999;
  --text-tertiary: #666666;
  --border: rgba(255,255,255,0.08);
  --border-light: rgba(255,255,255,0.12);
  --border-focus: rgba(255,255,255,0.2);
  --separator: rgba(255,255,255,0.05);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
  --transition: all 0.25s cubic-bezier(0.25,0.1,0.25,1);
  --font: 'Manrope', system-ui, -apple-system, sans-serif;
  --font-mono: 'SF Mono', 'JetBrains Mono', 'Menlo', monospace;
  color-scheme: dark;
}

/* ── Light theme disabled — always dark to match landing ──────── */

/* Manual dark override (when user selects dark in app) */
:root[data-theme="dark"] {
  color-scheme: dark;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--text-primary);line-height:1.65;min-height:100vh;min-height:100dvh;overflow-x:hidden;font-size:15px;letter-spacing:-0.01em;-webkit-tap-highlight-color:transparent;position:relative}
button,a,.nav-lesson,.nav-week-title,.nav-home,.btn-primary,.btn-secondary,.btn-outline,.auth-back,.staff-role-card,.s-avatar,.sidebar-footer,.menu-btn{touch-action:manipulation}
::selection{background:var(--accent);color:var(--accent-text, #0a0a0a)}
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.12);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,0.2)}
#axisAppRoot{position:relative;min-height:100vh;min-height:100dvh}
#magicCanvas{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:1;opacity:0;visibility:hidden;transition:opacity 0.45s ease, visibility 0.45s ease;background:#020502}
#axisAppRoot.auth-mode #magicCanvas{opacity:0.95;visibility:visible}
#axisAppRoot.app-mode #magicCanvas{opacity:0;visibility:hidden}

/* ====== AUTH PAGES ====== */
.auth-page{min-height:100vh;min-height:100dvh;display:flex;align-items:center;justify-content:center;position:relative;padding:20px;overflow-y:auto;overflow-x:hidden}
.auth-bg{position:fixed;inset:0;background:
  radial-gradient(ellipse 60% 60% at 50% 30%, rgba(48,209,88,0.12) 0%, rgba(48,209,88,0.03) 42%, transparent 72%),
  linear-gradient(180deg, rgba(4,16,7,0.24) 0%, rgba(0,0,0,0.08) 100%);
pointer-events:none}
.auth-card{position:relative;z-index:2;width:min(420px,100%);padding:44px 36px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-xl);backdrop-filter:blur(40px);-webkit-backdrop-filter:blur(40px)}
.auth-logo{text-align:center;margin-bottom:36px}
.auth-logo .logo-mark{width:48px;height:48px;background:linear-gradient(135deg,var(--accent),#b8e600);border-radius:var(--radius);display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:1.2rem;color:var(--accent-text, #0a0a0a);margin-bottom:16px}
.auth-logo h1{font-size:1.6rem;font-weight:700;letter-spacing:-0.02em}
.auth-logo p{color:var(--text-tertiary);font-size:0.85rem;margin-top:6px;font-weight:400}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:0.8rem;font-weight:500;color:var(--text-secondary);margin-bottom:6px;letter-spacing:0}
.form-group input,.form-group textarea{width:100%;padding:12px 16px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-family:var(--font);font-size:0.9rem;transition:var(--transition);outline:none;-webkit-appearance:none}
.form-group input:focus,.form-group textarea:focus{border-color:var(--accent);background:var(--bg-input-focus);box-shadow:0 0 0 3px var(--accent-soft)}
.form-group input::placeholder,.form-group textarea::placeholder{color:var(--text-tertiary)}
.form-group textarea{resize:vertical;min-height:80px;line-height:1.5}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.btn-primary{width:100%;padding:13px 24px;background:var(--accent);color:var(--accent-text, #0a0a0a);font-family:var(--font);font-size:0.9rem;font-weight:600;border:none;border-radius:var(--radius);cursor:pointer;transition:var(--transition);letter-spacing:-0.01em;margin-top:8px}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 20px rgba(226,255,46,0.25)}
.btn-primary:active{transform:translateY(0)}
.auth-switch{text-align:center;margin-top:24px;font-size:0.85rem;color:var(--text-tertiary)}
.auth-switch a{color:var(--accent);cursor:pointer;text-decoration:none;font-weight:500}
.auth-switch a:hover{text-decoration:underline}
.auth-footer{text-align:center;margin-top:28px;font-size:0.75rem;color:var(--text-tertiary);padding-top:20px;border-top:1px solid var(--border)}
.form-error{font-size:0.8rem;color:var(--pink);margin-top:6px;display:none}
.form-error.show{display:block}

/* ====== APP LAYOUT ====== */
.app{display:none;min-height:100vh;position:relative;z-index:2}
.app.active{display:flex}

/* Sidebar */
.sidebar{width:280px;height:100vh;background:var(--bg-elevated);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;left:0;top:0;z-index:100;transition:transform 0.35s cubic-bezier(0.25,0.1,0.25,1);overflow:hidden}
.sidebar-header{padding:20px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--separator)}
.sidebar-header .s-logo{width:32px;height:32px;background:linear-gradient(135deg,var(--accent),#b8e600);border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:0.75rem;color:var(--accent-text, #0a0a0a);flex-shrink:0}
.sidebar-header .s-info h2{font-size:0.9rem;font-weight:700;letter-spacing:-0.02em}
.sidebar-header .s-info span{font-size:0.7rem;color:var(--text-tertiary);font-weight:400}
.sidebar-nav{flex:1;padding:12px 10px;overflow-y:auto;overflow-x:hidden}
.sidebar-nav::-webkit-scrollbar{width:4px}
.sidebar-nav::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.08);border-radius:2px}
.nav-home{display:flex;align-items:center;gap:10px;padding:10px 12px;margin-bottom:8px;font-size:0.85rem;font-weight:500;color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-sm);transition:var(--transition)}
.nav-home:hover{background:rgba(255,255,255,0.04);color:var(--text-primary)}
.nav-home.active{background:var(--accent-soft);color:var(--accent)}
.nav-week{margin-bottom:4px}
.nav-week-title{display:flex;align-items:center;gap:8px;padding:8px 12px;font-size:0.72rem;font-weight:600;text-transform:uppercase;letter-spacing:0.08em;color:var(--text-tertiary);cursor:pointer;border-radius:var(--radius-sm);transition:var(--transition);user-select:none}
.nav-week-title:hover{color:var(--text-secondary)}
.nav-week-title .w-indicator{width:6px;height:6px;border-radius:50%;flex-shrink:0}
.nav-week-title .arrow{margin-left:auto;transition:transform 0.25s;font-size:0.6rem;opacity:0.5}
.nav-week.open .arrow{transform:rotate(90deg)}
.nav-lessons{display:none;padding:2px 0 6px 0}
.nav-week.open .nav-lessons{display:block}
.nav-lesson{display:flex;align-items:center;gap:8px;padding:8px 12px 8px 26px;font-size:0.82rem;color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-sm);transition:var(--transition);font-weight:400}
.nav-lesson:hover{background:rgba(255,255,255,0.04);color:var(--text-primary)}
.nav-lesson.active{background:var(--accent-soft);color:var(--accent);font-weight:500}
.nav-lesson .l-num{font-family:var(--font-mono);font-size:0.68rem;color:var(--text-tertiary);min-width:18px}
.nav-lesson .l-check{color:var(--green);font-size:0.7rem;margin-left:auto;display:none}
.nav-lesson.completed .l-check{display:block}
.nav-lesson.locked{opacity:0.35;pointer-events:none;position:relative}
.nav-lesson.locked::after{content:'🔒';margin-left:auto;font-size:0.65rem}
.dw-item.locked-item{opacity:0.4}
.dw-item.locked-item::after{content:' 🔒';font-size:0.7rem}
.locked-overlay{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px;text-align:center;margin:40px 0}
.locked-overlay h3{font-size:1.1rem;margin-bottom:10px}
.locked-overlay p{color:var(--text-secondary);font-size:0.9rem;margin-bottom:16px}

/* Profile page */
.profile-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;margin-bottom:20px}
.profile-card h4{font-size:0.95rem;font-weight:600;margin-bottom:16px}
.profile-avatar-wrap{display:flex;align-items:center;gap:20px;margin-bottom:24px}
.profile-avatar{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#b8e600);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:2rem;color:var(--accent-text, #0a0a0a);position:relative;overflow:hidden;flex-shrink:0;cursor:pointer;transition:var(--transition)}
.profile-avatar:hover{opacity:0.85}
.profile-avatar img{width:100%;height:100%;object-fit:cover;border-radius:50%}
.profile-avatar input{display:none}
.profile-avatar-hint{font-size:0.78rem;color:var(--text-tertiary)}
.profile-form{display:flex;flex-direction:column;gap:14px}
.profile-form .pf-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:600px){.profile-form .pf-row{grid-template-columns:1fr}}
.profile-form label{display:block;font-size:0.78rem;font-weight:500;color:var(--text-secondary);margin-bottom:4px}
.profile-form input{width:100%;padding:11px 16px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-family:var(--font);font-size:0.88rem;outline:none;transition:var(--transition)}
.profile-form input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.profile-saved{display:none;padding:10px 16px;background:var(--green-soft);border:1px solid rgba(48,209,88,0.15);border-radius:var(--radius-sm);color:var(--green);font-size:0.85rem;font-weight:500;margin-top:8px}
.sidebar-footer{padding:16px 14px;border-top:1px solid var(--separator);display:flex;align-items:center;gap:10px}
.s-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#b8e600);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:0.75rem;color:var(--accent-text, #0a0a0a);flex-shrink:0}
.s-user{flex:1;overflow:hidden}
.s-user .name{font-size:0.82rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.s-user .role{font-size:0.7rem;color:var(--text-tertiary)}
.btn-logout{background:none;border:none;color:var(--text-tertiary);cursor:pointer;padding:6px;border-radius:6px;transition:var(--transition);font-size:0.85rem}
.btn-logout:hover{color:var(--pink);background:var(--pink-soft)}

/* Main */
.main{flex:1;margin-left:280px;min-height:100vh;background:var(--bg)}
.topbar{position:sticky;top:0;z-index:50;padding:14px 40px;background:rgba(0,0,0,0.72);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.breadcrumb{font-size:0.8rem;color:var(--text-tertiary);font-weight:400}
.breadcrumb span{color:var(--text-primary);font-weight:500}
.progress-wrap{display:flex;align-items:center;gap:10px}
.progress-bar{width:160px;height:4px;background:var(--bg-tertiary);border-radius:2px;overflow:hidden}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--green));border-radius:2px;transition:width 0.6s cubic-bezier(0.25,0.1,0.25,1)}
.progress-label{font-size:0.75rem;color:var(--text-tertiary);font-family:var(--font-mono);font-weight:500}
/* .content base — see Dynamic content modes below */

/* Mobile */
.menu-btn{display:none;position:fixed;top:12px;left:12px;z-index:200;width:40px;height:40px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;align-items:center;justify-content:center;font-size:1.1rem;color:var(--text-primary)}
.auth-mode .menu-btn{display:none!important}
.overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:90}
/* ═══ TABLETS ═══ */
@media(max-width:900px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .overlay.show{display:block}
  .main{margin-left:0}
  .menu-btn{display:flex}
  .content{padding:20px 16px}
  .topbar{padding:12px 16px;padding-left:56px}
  .form-row{grid-template-columns:1fr}
  .lesson-header h1{font-size:1.45rem}
  .section-title{font-size:1.05rem}
  .dash-hero h1{font-size:1.6rem}
  .dash-hero{padding:40px 16px 36px}
  .lesson-table,.price-table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .lesson-table::-webkit-scrollbar,.price-table::-webkit-scrollbar{display:none}
  .lesson-table{font-size:0.75rem}
  .lesson-table th,.lesson-table td{padding:8px 10px}
  .price-table{font-size:0.72rem}
  .price-table th,.price-table td{padding:8px 10px}
  .card-tabs-header{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .card-tabs-header::-webkit-scrollbar{display:none}
  .c-tab{flex-shrink:0;padding:8px 14px;font-size:0.72rem}
  .example-block{font-size:0.75rem;padding:14px 16px;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .concept-box{padding:18px}
  .homework-section{padding:22px 18px}
  .steps .step-item{padding:14px 14px 14px 48px}
  .step-item::before{left:12px;top:14px;width:24px;height:24px;font-size:0.7rem}
  .lesson-nav{flex-direction:column;gap:10px}
  .lesson-nav .btn-nav{width:100%;text-align:center;padding:14px}
  .hw-upload-area .upload-zone{padding:20px}
  .auth-card{padding:32px 24px}
  .dash-weeks{gap:14px}
  .dash-week{padding:20px}
  .progress-wrap{display:none}
  .sidebar{width:280px}
  .topbar .breadcrumb{font-size:0.72rem;max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .hw-textarea{min-height:60px}
  .lesson-meta{gap:10px;flex-wrap:wrap}
  .lesson-meta span{font-size:0.72rem}
  .section{margin-bottom:36px}
  .acc-header{padding:12px 16px;font-size:0.84rem}
  .acc-body{padding:16px}
  .tip-box,.warning-box{padding:16px 18px}
  .btn-submit{width:100%;justify-content:center;padding:14px}
  .profile-avatar-wrap{flex-direction:column;align-items:flex-start;gap:14px}
}

/* ═══ PHONES ═══ */
@media(max-width:480px){
  /* Auth — fixed viewport, no bouncing */
  .auth-page{
    padding:16px;
    align-items:flex-start;
    padding-top:max(16px, env(safe-area-inset-top));
    padding-bottom:max(16px, env(safe-area-inset-bottom));
  }
  .auth-card{
    padding:28px 20px;
    border-radius:var(--radius-lg);
    margin-top:auto;margin-bottom:auto;
  }
  .auth-logo{margin-bottom:22px}
  .auth-logo .logo-mark{width:40px;height:40px;font-size:1rem;margin-bottom:10px}
  .auth-logo h1{font-size:1.3rem}
  .auth-logo p{font-size:0.78rem;margin-top:4px}
  .form-group{margin-bottom:12px}
  .form-group label{font-size:0.75rem;margin-bottom:4px}
  /* 16px font-size prevents iOS auto-zoom on input focus */
  .form-group input,.form-group textarea,.hw-textarea{font-size:16px !important;padding:11px 14px}
  .btn-primary{padding:14px 20px;font-size:16px;margin-top:4px}
  .auth-switch{margin-top:16px;font-size:0.8rem}
  .auth-footer{margin-top:16px;padding-top:12px;font-size:0.7rem}
  .form-error{font-size:0.75rem}
  .form-row{gap:10px}

  /* Content area */
  .content{padding:14px 12px}
  .lesson-header{margin-bottom:28px;padding-bottom:20px}
  .lesson-header h1{font-size:1.25rem;line-height:1.3}
  .lesson-header>p{font-size:0.85rem}
  .section-title{font-size:0.98rem;gap:10px}
  .sec-num{width:24px;height:24px;font-size:0.7rem;border-radius:6px}
  .section p,.section li{font-size:0.85rem}

  /* Tables */
  .lesson-table{font-size:0.7rem}
  .lesson-table th,.lesson-table td{padding:7px 8px;white-space:nowrap}
  .lesson-table code{font-size:0.65rem;padding:1px 4px}
  .price-table{font-size:0.68rem}
  .price-table th,.price-table td{padding:7px 8px}

  /* Cards and boxes */
  .concept-box{padding:14px}
  .concept-box h4{font-size:0.88rem}
  .concept-box p{font-size:0.82rem}
  .tip-box,.warning-box{padding:14px 16px;font-size:0.82rem}
  .card-tabs{border-radius:var(--radius)}
  .card-tabs-body{padding:14px}
  .card-tabs-body p{font-size:0.82rem}

  /* Steps */
  .steps .step-item{padding:12px 12px 12px 44px}
  .step-item::before{left:10px;top:12px;width:22px;height:22px;font-size:0.65rem}
  .step-item h4{font-size:0.85rem}
  .step-item p{font-size:0.8rem}

  /* Homework */
  .homework-section{padding:16px 14px;margin:28px 0}
  .homework-section h3{font-size:0.95rem}
  .hw-task{padding:12px}
  .hw-task h4{font-size:0.85rem}
  .hw-task p,.hw-step{font-size:0.8rem}
  .hw-format{font-size:0.72rem}
  .upload-zone{padding:16px 12px}

  /* Example blocks */
  .example-block{font-size:0.7rem;padding:12px 14px;border-radius:var(--radius-sm)}
  .example-block .label{font-size:0.62rem;margin-bottom:8px}

  /* Dashboard */
  .dash-hero h1{font-size:1.3rem}
  .dash-hero p{font-size:0.85rem}
  .dash-week{padding:14px}
  .dw-header h3{font-size:0.92rem}
  .dw-badge{font-size:0.6rem}
  .dw-lessons{gap:4px}
  .dw-item{padding:6px 10px;font-size:0.8rem}

  /* Accordion, quiz, nav */
  .acc-header{padding:12px 14px;font-size:0.82rem}
  .acc-body{padding:12px}
  .acc-body p{font-size:0.82rem}
  .checklist li{font-size:0.82rem;padding:5px 0}
  .quiz-option{padding:11px 14px;font-size:0.84rem}
  .btn-nav{padding:13px 16px;font-size:0.84rem}

  /* Topbar & sidebar */
  .topbar{padding:10px 12px 10px 52px}
  .topbar .breadcrumb{font-size:0.68rem;max-width:140px}
  .nav-lesson{padding:7px 10px 7px 22px;font-size:0.8rem}
  .nav-week-title{padding:7px 10px;font-size:0.68rem}
  .sidebar-footer{padding:12px}
  .s-avatar{width:28px;height:28px;font-size:0.65rem}
  .s-user .name{font-size:0.78rem}

  /* Misc */
  .locked-overlay{padding:28px 18px}
  .locked-overlay h3{font-size:0.95rem}
  .locked-overlay p{font-size:0.82rem}
  .profile-card{padding:20px 14px}
  .profile-avatar{width:64px;height:64px;font-size:1.5rem}
}

/* ═══ VERY SMALL SCREENS ═══ */
@media(max-width:360px){
  .auth-card{padding:22px 16px}
  .auth-logo h1{font-size:1.15rem}
  .content{padding:10px 10px}
  .lesson-header h1{font-size:1.1rem}
  .dash-hero h1{font-size:1.2rem}
  .concept-box,.tip-box,.warning-box{padding:12px}
  .homework-section{padding:14px 12px}
}

/* ═══ LANDSCAPE PHONES ═══ */
@media(max-height:500px) and (max-width:900px){
  .auth-page{align-items:flex-start;padding:10px}
  .auth-card{margin-top:8px;padding:18px 16px}
  .auth-logo{margin-bottom:12px}
  .auth-logo .logo-mark{width:32px;height:32px;margin-bottom:6px}
  .auth-logo h1{font-size:1.1rem}
  .form-group{margin-bottom:6px}
  .form-group input{padding:9px 12px}
  .auth-switch{margin-top:10px}
  .auth-footer{margin-top:10px;padding-top:8px}
}

/* ====== DASHBOARD ====== */
.dash-hero{text-align:center;padding:60px 20px 48px;position:relative}
.dash-hero::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:80px;height:1px;background:var(--border-light)}
.dash-hero h1{font-size:2.2rem;font-weight:700;letter-spacing:-0.03em;line-height:1.2}
.dash-hero h1 .hl{background:linear-gradient(135deg,var(--accent),var(--teal));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.dash-hero p{color:var(--text-secondary);font-size:1rem;margin-top:10px;max-width:520px;margin-left:auto;margin-right:auto;font-weight:400}
.dash-weeks{display:flex;flex-direction:column;gap:20px;margin-top:40px}
.dash-week{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;transition:var(--transition);cursor:pointer}
.dash-week:hover{border-color:var(--border-light);transform:translateY(-2px);box-shadow:var(--shadow)}
.dw-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.dw-header h3{font-size:1.1rem;font-weight:600;letter-spacing:-0.02em}
.dw-badge{font-size:0.68rem;padding:4px 10px;border-radius:20px;font-weight:600}
.dw-desc{color:var(--text-secondary);font-size:0.88rem;margin-bottom:16px}
.dw-lessons{display:flex;flex-direction:column;gap:6px}
.dw-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:var(--radius-sm);background:rgba(255,255,255,0.02);font-size:0.85rem;color:var(--text-secondary)}
.dw-item .ico{font-size:0.95rem;width:22px;text-align:center}

/* ====== LESSON STYLES ====== */
.lesson-header{margin-bottom:48px;padding-bottom:36px;border-bottom:1px solid var(--border)}
.lesson-tag{display:inline-block;font-size:0.68rem;padding:5px 14px;border-radius:20px;font-weight:600;letter-spacing:0.02em;margin-bottom:16px}
.lesson-header h1{font-size:1.9rem;font-weight:700;letter-spacing:-0.03em;line-height:1.25;margin-bottom:10px}
.lesson-header>p{color:var(--text-secondary);font-size:0.95rem;max-width:650px;line-height:1.7}
.lesson-meta{display:flex;flex-wrap:wrap;gap:20px;margin-top:18px}
.lesson-meta span{font-size:0.8rem;color:var(--text-tertiary);display:flex;align-items:center;gap:6px;font-weight:400}

.section{margin-bottom:56px}
.section-title{font-size:1.2rem;font-weight:600;letter-spacing:-0.02em;margin-bottom:20px;display:flex;align-items:center;gap:12px}
.sec-num{width:28px;height:28px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:0.78rem;font-weight:700;flex-shrink:0;font-family:var(--font-mono)}
.section p,.section li{color:var(--text-secondary);font-size:0.9rem;line-height:1.8}
.section p{margin-bottom:14px}
.section strong{color:var(--text-primary);font-weight:600}

/* Concept Box */
.concept-box{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin:20px 0}
.concept-box h4{font-size:0.95rem;font-weight:600;margin-bottom:12px;color:var(--accent)}
.concept-box p{margin-bottom:8px;font-size:0.88rem}

/* Tip Box */
.tip-box{background:var(--teal-soft);border:1px solid rgba(100,210,255,0.12);border-radius:var(--radius);padding:20px 24px;margin:20px 0;position:relative}
.tip-box h4{font-size:0.85rem;color:var(--teal);font-weight:600;margin-bottom:4px;display:inline}

/* Warning Box */
.warning-box{background:var(--orange-soft);border:1px solid rgba(255,159,10,0.12);border-radius:var(--radius);padding:20px 24px;margin:20px 0}
.warning-box h4{font-size:0.85rem;color:var(--orange);font-weight:600;margin-bottom:8px}

/* Example Code */
.example-block{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin:20px 0;font-family:var(--font-mono);font-size:0.82rem;line-height:1.8;color:var(--text-secondary);white-space:pre-wrap;overflow-x:auto}
.example-block .label{font-family:var(--font);font-size:0.68rem;text-transform:uppercase;letter-spacing:0.08em;color:var(--accent);font-weight:600;margin-bottom:12px;display:block}

/* Tables */
.lesson-table{width:100%;border-collapse:separate;border-spacing:0;margin:20px 0;font-size:0.82rem;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.lesson-table thead{background:var(--bg-tertiary)}
.lesson-table th{padding:12px 16px;text-align:left;font-weight:600;font-size:0.72rem;text-transform:uppercase;letter-spacing:0.06em;color:var(--text-tertiary);border-bottom:1px solid var(--border)}
.lesson-table td{padding:12px 16px;border-bottom:1px solid var(--separator);color:var(--text-secondary);vertical-align:top}
.lesson-table tr:last-child td{border-bottom:none}
.lesson-table tr:hover td{background:rgba(255,255,255,0.015)}
.lesson-table code{font-family:var(--font-mono);font-size:0.78rem;background:var(--bg-secondary);padding:2px 8px;border-radius:4px;color:var(--accent)}
.lesson-table.minimal{background:transparent;border:1px solid rgba(255,255,255,0.08);box-shadow:none}
.lesson-table.minimal thead{background:transparent}
.lesson-table.minimal th{padding:14px 16px;color:var(--text-tertiary);font-size:0.68rem;letter-spacing:0.1em;border-bottom:1px solid rgba(255,255,255,0.08)}
.lesson-table.minimal td{padding:16px;border-bottom:1px solid rgba(255,255,255,0.06);background:transparent}
.lesson-table.minimal tr:hover td{background:rgba(255,255,255,0.01)}
.lesson-table.minimal td strong{color:var(--text-primary)}

/* Tabs */
.card-tabs{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;margin:24px 0}
.card-tabs-header{padding:4px;margin:16px 16px 0;background:var(--bg-secondary);border-radius:var(--radius);display:flex;gap:2px;overflow-x:auto}
.c-tab{padding:9px 18px;font-size:0.78rem;font-weight:500;border:none;background:none;color:var(--text-tertiary);cursor:pointer;border-radius:var(--radius-sm);transition:var(--transition);white-space:nowrap;font-family:var(--font)}
.c-tab.active{background:var(--bg-card);color:var(--text-primary);box-shadow:var(--shadow-sm)}
.c-tab:hover:not(.active){color:var(--text-secondary)}
.card-tabs-body{padding:20px}
.tc{display:none}
.tc.active{display:block}

/* Steps */
.steps{counter-reset:step;margin:20px 0}
.step-item{counter-increment:step;position:relative;padding:20px 20px 20px 58px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:10px;transition:var(--transition)}
.step-item:hover{border-color:var(--border-light)}
.step-item::before{content:counter(step);position:absolute;left:18px;top:20px;width:26px;height:26px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:0.75rem;font-family:var(--font-mono)}
.step-item h4{font-size:0.9rem;font-weight:600;margin-bottom:4px;letter-spacing:-0.01em}
.step-item p{font-size:0.85rem;color:var(--text-secondary);line-height:1.7}

/* Accordion */
.accordion{margin:20px 0}
.acc-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:8px;overflow:hidden;transition:var(--transition)}
.acc-header{padding:14px 20px;background:var(--bg-card);cursor:pointer;display:flex;align-items:center;justify-content:space-between;font-weight:500;font-size:0.88rem;transition:var(--transition)}
.acc-header:hover{background:var(--bg-card-hover)}
.acc-header .chevron{transition:transform 0.25s;font-size:0.7rem;color:var(--text-tertiary)}
.acc-item.open .chevron{transform:rotate(180deg)}
.acc-body{display:none;padding:20px;border-top:1px solid var(--border)}
.acc-item.open .acc-body{display:block}

/* Checklist */
.checklist{list-style:none;padding:0;margin:16px 0}
.checklist li{display:flex;align-items:flex-start;gap:10px;padding:8px 0;color:var(--text-secondary);font-size:0.88rem;line-height:1.7}
.checklist li::before{content:'✦';color:var(--accent);flex-shrink:0;margin-top:3px;font-size:0.7rem}

/* Quiz */
.quiz-option{display:block;width:100%;padding:12px 16px;margin:5px 0;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-secondary);font-size:0.88rem;cursor:pointer;transition:var(--transition);text-align:left;font-family:var(--font)}
.quiz-option:hover{border-color:var(--border-light)}
.quiz-option.correct{border-color:var(--green);background:var(--green-soft);color:var(--green)}
.quiz-option.wrong{border-color:var(--pink);background:var(--pink-soft);color:var(--pink)}

/* Price Table */
.price-table{width:100%;border-collapse:separate;border-spacing:0;margin:20px 0;font-size:0.78rem;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.price-table thead{background:var(--accent-soft)}
.price-table th{padding:14px 14px;text-align:left;font-weight:600;font-size:0.7rem;text-transform:uppercase;letter-spacing:0.06em;color:var(--accent);border-bottom:1px solid rgba(226,255,46,0.15)}
.price-table td{padding:12px 14px;border-bottom:1px solid var(--separator);color:var(--text-secondary)}
.price-table tr:last-child td{border-bottom:none}
.price-table tr:hover td{background:rgba(255,255,255,0.015)}

/* ====== HOMEWORK ====== */
.homework-section{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;margin:48px 0;position:relative;overflow:hidden}
.homework-section::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--accent),var(--purple),var(--pink))}
.homework-section h3{font-size:1.1rem;font-weight:600;margin-bottom:20px;display:flex;align-items:center;gap:10px;letter-spacing:-0.02em}
.hw-task{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin:12px 0}
.hw-task h4{font-size:0.92rem;font-weight:600;margin-bottom:10px}
.hw-task p{font-size:0.85rem;color:var(--text-secondary);line-height:1.7;margin-bottom:6px}
.hw-steps{counter-reset:hwstep;margin:12px 0 0}
.hw-step{counter-increment:hwstep;display:flex;gap:10px;padding:8px 0;font-size:0.85rem;color:var(--text-secondary);line-height:1.6}
.hw-step::before{content:counter(hwstep)'.';color:var(--accent);font-weight:600;font-family:var(--font-mono);min-width:22px;font-size:0.8rem;padding-top:1px}
.hw-format{margin-top:12px;padding:12px 16px;background:var(--bg-tertiary);border-radius:var(--radius-sm);display:flex;align-items:center;gap:8px;font-size:0.8rem;color:var(--text-tertiary)}
.hw-format .format-label{font-weight:600;color:var(--text-secondary)}
.hw-upload-area{margin-top:20px;padding-top:20px;border-top:1px solid var(--separator)}
.hw-textarea{width:100%;padding:12px 16px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-family:var(--font);font-size:0.85rem;resize:vertical;min-height:80px;outline:none;transition:var(--transition);margin-bottom:12px;line-height:1.6}
.hw-textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.hw-textarea::placeholder{color:var(--text-tertiary)}
.upload-zone{border:1.5px dashed var(--border-light);border-radius:var(--radius);padding:28px;text-align:center;cursor:pointer;transition:var(--transition)}
.upload-zone:hover{border-color:var(--accent);background:var(--accent-soft)}
.upload-zone .up-icon{font-size:1.5rem;margin-bottom:6px;display:block}
.upload-zone p{color:var(--text-tertiary);font-size:0.82rem}
.upload-zone input[type="file"]{display:none}
.btn-submit{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;background:var(--accent);color:var(--accent-text, #0a0a0a);font-family:var(--font);font-size:0.85rem;font-weight:600;border:none;border-radius:var(--radius);cursor:pointer;transition:var(--transition);margin-top:14px}
.btn-submit:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 16px rgba(226,255,46,0.3)}

/* Nav buttons */
.lesson-nav{display:flex;justify-content:space-between;margin-top:56px;padding-top:24px;border-top:1px solid var(--border)}
.btn-nav{padding:11px 22px;border-radius:var(--radius);font-family:var(--font);font-size:0.85rem;font-weight:500;cursor:pointer;transition:var(--transition);border:1px solid var(--border);background:var(--bg-card);color:var(--text-secondary);letter-spacing:-0.01em}
.btn-nav:hover{border-color:var(--border-light);color:var(--text-primary)}
.btn-nav.primary{background:var(--accent);color:var(--accent-text, #0a0a0a);border-color:var(--accent)}
.btn-nav.primary:hover{background:var(--accent-hover)}

/* Auth states */
.auth-view{display:none}
.auth-view.active{display:block}
.auth-wordmark{font-size:1.8rem;font-weight:900;letter-spacing:0.12em;margin-bottom:16px;user-select:none}
.auth-back{display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;background:none;border:none;color:var(--text-tertiary);font:inherit;font-size:0.82rem;cursor:pointer;transition:var(--transition);padding:0}
.auth-back:hover{color:var(--text-primary)}
.staff-role-grid{display:flex;flex-direction:column;gap:12px;margin-top:4px}
.staff-role-card{width:100%;padding:14px 16px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-input);cursor:pointer;transition:var(--transition);text-align:left;color:inherit}
.staff-role-card:hover{border-color:var(--accent);background:var(--bg-input-focus);box-shadow:0 0 0 3px var(--accent-soft)}
.staff-role-card strong{display:block;font-size:0.9rem;font-weight:600;margin-bottom:4px}
.staff-role-card span{display:block;font-size:0.8rem;line-height:1.5;color:var(--text-tertiary)}

/* Dynamic content modes */
.content{padding:40px;max-width:920px;margin:0 auto;transition:max-width 0.3s cubic-bezier(0.25,0.1,0.25,1)}
.content.is-lesson,.content.is-staff{max-width:1280px}
.page-limit{max-width:860px;margin:0 auto}
.lesson-shell{display:grid;grid-template-columns:minmax(0,1fr) 18px;gap:18px;align-items:start}
.lesson-main{min-width:0}
.lesson-header,.section,.homework-section,.lesson-nav{scroll-margin-top:96px}
.section p,.section li,.acc-body p,.concept-box p,.hw-step,.hw-format,.lesson-header>p,.staff-card p,.staff-empty p,.staff-list-item p{overflow-wrap:anywhere}
.lesson-toc{position:sticky;top:92px;justify-self:end;width:18px;height:calc(100vh - 128px);opacity:0;transform:translateX(12px);animation:tocReveal 0.45s cubic-bezier(0.25,0.1,0.25,1) forwards;overflow:visible}
.lesson-toc::before{content:'';position:absolute;top:0;right:7px;width:3px;height:100%;border-radius:999px;background:linear-gradient(180deg,rgba(255,255,255,0.02),rgba(255,255,255,0.18),rgba(255,255,255,0.02));transition:background 0.22s ease,opacity 0.22s ease,transform 0.22s ease;opacity:0.55}
.lesson-toc:hover::before,.lesson-toc:focus-within::before{background:linear-gradient(180deg,rgba(226,255,46,0.08),rgba(226,255,46,0.55),rgba(226,255,46,0.08));opacity:1;transform:scaleY(1.01)}
.lesson-toc-panel{position:absolute;top:0;right:12px;width:220px;max-height:calc(100vh - 128px);padding:14px 8px 12px 14px;border:1px solid var(--border);border-radius:14px;background:var(--bg-card);box-shadow:var(--shadow);opacity:0;transform:translateX(14px) scale(0.98);pointer-events:none;transition:opacity 0.22s ease,transform 0.22s ease}
.lesson-toc:hover .lesson-toc-panel,.lesson-toc:focus-within .lesson-toc-panel{opacity:1;transform:translateX(0) scale(1);pointer-events:auto}
.lesson-toc-header{margin-bottom:10px;font-size:0.7rem;font-weight:700;letter-spacing:0.08em;text-transform:uppercase;color:var(--text-tertiary)}
.lesson-toc-nav,.toc-mobile-list{display:flex;flex-direction:column;gap:2px}
.lesson-toc-nav{max-height:calc(100vh - 184px);overflow:auto;padding-right:6px}
.lesson-toc-link{display:flex;align-items:flex-start;gap:10px;padding:7px 10px;border-radius:8px;font-size:0.81rem;line-height:1.4;color:var(--text-tertiary);text-decoration:none;transition:background 0.18s ease,color 0.18s ease,transform 0.22s ease}
.lesson-toc-link:hover{background:rgba(255,255,255,0.03);color:var(--text-secondary)}
.lesson-toc-link.active{background:rgba(255,255,255,0.04);color:var(--text-primary);transform:translateX(2px)}
.lesson-toc-link .toc-bullet{width:6px;height:6px;margin-top:7px;border-radius:999px;background:rgba(255,255,255,0.16);flex-shrink:0;transition:background 0.18s ease,transform 0.22s ease}
.lesson-toc-link.active .toc-bullet,.lesson-toc-link.is-overview .toc-bullet{background:var(--accent);transform:scale(1.15)}
.lesson-toc-link .toc-label{display:block}
.toc-mobile-wrap{display:none;position:sticky;top:72px;z-index:35;margin:-8px 0 18px}
.toc-mobile-btn{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:10px;border:1px solid var(--border);background:var(--bg-card);color:var(--text-secondary);font:inherit;font-size:0.8rem;font-weight:600;cursor:pointer;box-shadow:var(--shadow-sm);transition:var(--transition)}
.toc-mobile-btn:hover{border-color:var(--border-light);color:var(--text-primary)}
.toc-mobile-panel{margin-top:10px;border:1px solid var(--border);border-radius:14px;background:var(--bg-card);box-shadow:var(--shadow);max-height:0;overflow:hidden;opacity:0;transform:translateY(-8px);transition:max-height 0.32s ease,opacity 0.22s ease,transform 0.22s ease,padding 0.22s ease;padding:0 14px}
.toc-mobile-panel.open{max-height:420px;padding:12px 14px;opacity:1;transform:translateY(0)}
.toc-mobile-panel .lesson-toc-header{margin-bottom:8px}

/* Homework */
.homework-status-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.status-pill{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;border:1px solid var(--border);font-size:0.76rem;font-weight:600;letter-spacing:0.02em}
.status-pill.submitted{background:var(--orange-soft);color:var(--orange);border-color:rgba(255,159,10,0.2)}
.status-pill.approved{background:var(--green-soft);color:var(--green);border-color:rgba(48,209,88,0.18)}
.status-pill.needs_revision{background:var(--pink-soft);color:var(--pink);border-color:rgba(255,55,95,0.18)}
.homework-meta{display:flex;flex-wrap:wrap;gap:12px;font-size:0.78rem;color:var(--text-tertiary)}
.upload-files{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.file-chip{display:inline-flex;align-items:center;gap:8px;padding:8px 10px;border-radius:999px;background:var(--bg-secondary);border:1px solid var(--border);font-size:0.76rem;color:var(--text-secondary)}
.homework-review{margin-top:18px;padding:18px;border-radius:var(--radius);background:rgba(226,255,46,0.06);border:1px solid rgba(226,255,46,0.12)}
.homework-review h4{font-size:0.88rem;font-weight:600;margin-bottom:10px}
.homework-review p{color:var(--text-secondary);font-size:0.86rem}

/* Staff */
.staff-shell{display:flex;flex-direction:column;gap:24px}
.staff-hero{background:linear-gradient(135deg,rgba(226,255,46,0.12),rgba(191,90,242,0.08));border:1px solid var(--border);border-radius:var(--radius-2xl);padding:28px 28px 26px;box-shadow:var(--shadow)}
.staff-hero h1{font-size:1.8rem;font-weight:700;letter-spacing:-0.03em;margin-bottom:8px}
.staff-hero p{font-size:0.92rem;color:var(--text-secondary);max-width:720px}
.staff-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.staff-card,.staff-stat{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}
.staff-stat{padding:18px}
.staff-stat .label{font-size:0.74rem;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:0.08em;margin-bottom:10px}
.staff-stat .value{font-size:1.55rem;font-weight:700;letter-spacing:-0.03em}
.staff-stat .hint{margin-top:6px;font-size:0.8rem;color:var(--text-secondary)}
.staff-grid{display:grid;grid-template-columns:320px minmax(0,1fr);gap:20px;align-items:start}
.staff-card{padding:20px}
.staff-card h3{font-size:1rem;font-weight:600;letter-spacing:-0.02em;margin-bottom:12px}
.staff-filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}
.staff-chip-row{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 16px}
.staff-chip{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;border:1px solid var(--border);background:rgba(255,255,255,0.02);color:var(--text-secondary);font:inherit;font-size:0.78rem;font-weight:600;cursor:pointer;transition:var(--transition)}
.staff-chip:hover{border-color:var(--border-light);color:var(--text-primary);transform:translateY(-1px)}
.staff-chip.active{background:var(--accent-soft);border-color:rgba(226,255,46,0.22);color:var(--accent)}
.staff-chip-count{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;padding:0 6px;border-radius:999px;background:rgba(255,255,255,0.06);font-size:0.72rem;color:inherit}
.staff-select,.staff-input,.staff-textarea{width:100%;padding:11px 14px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font:inherit;font-size:0.86rem;outline:none;transition:var(--transition)}
.staff-select:focus,.staff-input:focus,.staff-textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.staff-textarea{min-height:108px;resize:vertical;line-height:1.6}
.staff-list{display:flex;flex-direction:column;gap:10px}
.staff-list-item{padding:14px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-secondary);cursor:pointer;transition:var(--transition)}
.staff-list-item:hover{border-color:var(--border-light);transform:translateY(-1px)}
.staff-list-item.active{border-color:var(--accent);background:rgba(226,255,46,0.08)}
.staff-list-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:6px}
.staff-list-item strong{display:block;font-size:0.86rem;margin-bottom:6px}
.staff-list-item .meta{display:flex;flex-wrap:wrap;gap:10px;font-size:0.76rem;color:var(--text-tertiary)}
.staff-stack{display:flex;flex-direction:column;gap:20px}
.staff-mini-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.staff-mini-stat{padding:14px 16px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-secondary)}
.staff-mini-stat .label{font-size:0.72rem;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:0.08em;margin-bottom:8px}
.staff-mini-stat .value{font-size:1.15rem;font-weight:700;letter-spacing:-0.03em}
.staff-mini-stat .hint{margin-top:6px;font-size:0.78rem;color:var(--text-secondary)}
.metric-danger{color:#ff453a !important}
.metric-ok{color:var(--green) !important}
.insight-funnel{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:16px}
.insight-funnel-card{padding:14px 16px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-secondary)}
.insight-funnel-card .label{font-size:0.72rem;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:0.08em;margin-bottom:8px}
.insight-funnel-card .value{font-size:1.15rem;font-weight:700;letter-spacing:-0.03em}
.insight-funnel-card .hint{margin-top:6px;font-size:0.78rem;color:var(--text-secondary)}
.insight-list{display:flex;flex-direction:column;gap:10px}
.insight-row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding:12px 14px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-secondary)}
.insight-row strong{display:block;font-size:0.84rem}
.insight-row span{display:block;font-size:0.74rem;color:var(--text-tertiary);margin-top:4px}
.insight-badges{display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end}
.insight-pill{display:inline-flex;align-items:center;justify-content:center;padding:6px 10px;border-radius:999px;background:rgba(255,255,255,0.04);border:1px solid var(--border);font-size:0.74rem;color:var(--text-secondary)}
.insight-pill.accent{background:var(--accent-soft);border-color:rgba(226,255,46,0.18);color:var(--accent)}
.activity-feed{display:flex;flex-direction:column;gap:10px}
.activity-item{padding:14px 16px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-secondary)}
.activity-item-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:8px}
.activity-item strong{display:block;font-size:0.84rem}
.activity-item time{font-size:0.74rem;color:var(--text-tertiary);white-space:nowrap}
.activity-item .meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:8px;font-size:0.74rem;color:var(--text-tertiary)}
.activity-item p{font-size:0.82rem;color:var(--text-secondary)}
.staff-badges{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end}
.staff-badges-stack{display:flex;flex-direction:column;gap:10px}
.staff-badge{display:inline-flex;align-items:center;justify-content:center;padding:6px 10px;border-radius:999px;border:1px solid var(--border);background:rgba(255,255,255,0.04);font-size:0.72rem;font-weight:600;line-height:1;color:var(--text-secondary);white-space:nowrap}
.staff-badge.accent{background:var(--accent-soft);border-color:rgba(226,255,46,0.22);color:var(--accent)}
.staff-badge.premium{background:var(--purple-soft);border-color:rgba(191,90,242,0.22);color:var(--purple)}
.staff-badge.warning{background:var(--orange-soft);border-color:rgba(255,159,10,0.22);color:var(--orange)}
.staff-badge.danger{background:rgba(255,69,58,0.12);border-color:rgba(255,69,58,0.22);color:#ff7b72}
.staff-badge.success{background:var(--green-soft);border-color:rgba(48,209,88,0.22);color:var(--green)}
.staff-badge.pink{background:var(--pink-soft);border-color:rgba(255,55,95,0.22);color:var(--pink)}
.staff-badge.purple{background:var(--purple-soft);border-color:rgba(191,90,242,0.22);color:var(--purple)}
.staff-badge.muted{background:rgba(255,255,255,0.03);border-color:var(--border);color:var(--text-tertiary)}
.staff-callout{padding:14px 16px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-secondary)}
.staff-callout strong{display:block;font-size:0.84rem;margin-bottom:6px}
.staff-callout p{font-size:0.82rem;color:var(--text-secondary)}
.staff-callout.warning{background:var(--orange-soft);border-color:rgba(255,159,10,0.16)}
.staff-callout.warning strong{color:var(--orange)}
.staff-callout.purple{background:var(--purple-soft);border-color:rgba(191,90,242,0.16)}
.staff-callout.purple strong{color:var(--purple)}
.staff-callout.danger{background:rgba(255,69,58,0.09);border-color:rgba(255,69,58,0.16)}
.staff-callout.danger strong{color:#ff7b72}
.staff-note{font-size:0.8rem;color:var(--text-secondary);margin-top:8px}
.staff-note code{font-family:var(--font-mono);font-size:0.76rem}
.staff-danger-zone{padding-top:14px;margin-top:14px;border-top:1px solid var(--separator)}
.staff-danger-zone h4{font-size:0.82rem;margin-bottom:8px;color:#ff453a}
.staff-section-label{font-size:0.78rem;color:var(--text-tertiary);margin-bottom:10px}
.staff-grid-wide{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,0.85fr);gap:20px;align-items:start}
.notification-list{display:flex;flex-direction:column;gap:10px}
.notification-item{padding:14px 16px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-secondary)}
.notification-item strong{display:block;font-size:0.84rem;margin-bottom:4px}
.notification-item .meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:6px;font-size:0.74rem;color:var(--text-tertiary)}
.notification-item p{font-size:0.8rem;color:var(--text-secondary)}
.staff-inline-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.btn-danger{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;background:rgba(255,69,58,0.1);color:#ff7b72;border:1px solid rgba(255,69,58,0.22);border-radius:var(--radius);font:inherit;font-size:0.84rem;font-weight:600;cursor:pointer;transition:var(--transition)}
.btn-danger:hover{transform:translateY(-1px);background:rgba(255,69,58,0.14)}
.staff-table{width:100%;border-collapse:separate;border-spacing:0;font-size:0.84rem}
.staff-table th,.staff-table td{padding:12px 10px;text-align:left;border-bottom:1px solid var(--separator);vertical-align:top}
.staff-table th{font-size:0.72rem;text-transform:uppercase;letter-spacing:0.08em;color:var(--text-tertiary);font-weight:600}
.staff-table tr:last-child td{border-bottom:none}
.staff-table td code{font-family:var(--font-mono);font-size:0.75rem}
.staff-detail-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.toggle-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px}
.switch-card{display:flex;align-items:center;gap:10px;padding:12px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-secondary);font-size:0.82rem;color:var(--text-secondary)}
.switch-card input{accent-color:var(--accent);width:16px;height:16px;flex-shrink:0}
.staff-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border);border-radius:var(--radius);font:inherit;font-size:0.84rem;font-weight:600;cursor:pointer;transition:var(--transition)}
.btn-secondary:hover{border-color:var(--border-light);transform:translateY(-1px)}
.staff-empty{padding:22px;border-radius:var(--radius);border:1px dashed var(--border-light);background:rgba(255,255,255,0.02)}
.staff-empty p{font-size:0.84rem;color:var(--text-secondary)}
.muted{color:var(--text-tertiary)}

/* Animations */
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes tocReveal{from{opacity:0;transform:translateX(12px)}to{opacity:1;transform:translateX(0)}}
.fade-up{animation:fadeUp 0.5s cubic-bezier(0.25,0.1,0.25,1) forwards}
.d1{animation-delay:0.06s;opacity:0}.d2{animation-delay:0.12s;opacity:0}.d3{animation-delay:0.18s;opacity:0}

@media(max-width:1100px){
  .lesson-shell{grid-template-columns:1fr}
  .lesson-toc{display:none}
  .toc-mobile-wrap{display:block}
  .staff-grid{grid-template-columns:1fr}
  .staff-grid-wide{grid-template-columns:1fr}
}

@media(max-width:900px){
  .content.is-lesson,.content.is-staff{max-width:none}
  .staff-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .insight-funnel{grid-template-columns:repeat(2,minmax(0,1fr))}
  .staff-list-head{flex-direction:column;align-items:flex-start}
  .staff-badges{justify-content:flex-start}
}

@media(max-width:640px){
  .staff-detail-grid{grid-template-columns:1fr}
  .staff-stats{grid-template-columns:1fr}
  .staff-hero{padding:22px 18px}
  .insight-funnel{grid-template-columns:1fr}
  .insight-row{flex-direction:column}
  .insight-badges{justify-content:flex-start}
}

/* Card layout for tables on small screens */
@media(max-width:480px){
  .lesson-table,.price-table{overflow-x:visible}
  .lesson-table thead,.price-table thead{display:none}
  .lesson-table tbody,.price-table tbody{display:flex;flex-direction:column;gap:8px}
  .lesson-table tr,.price-table tr{display:flex;flex-direction:column;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px;gap:4px}
  .lesson-table td,.price-table td{display:flex;padding:2px 0;border:none;font-size:0.8rem;gap:8px}
  .lesson-table td::before,.price-table td::before{content:attr(data-label);font-weight:600;color:var(--text-secondary);min-width:fit-content;flex-shrink:0}
  .lesson-table td:first-child{font-weight:600;color:var(--text-primary);font-size:0.85rem}
}

/* Light theme disabled -- always dark to match landing */

/* ── Safe area for iPhone notch / Dynamic Island ───────────────── */
/* Skeleton loading */
.skeleton-block{background:var(--bg-card);border-radius:8px;animation:skeleton-pulse 1.5s ease-in-out infinite}
@keyframes skeleton-pulse{0%,100%{opacity:.4}50%{opacity:.8}}

@supports(padding-top: env(safe-area-inset-top)){
  .sidebar{padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}
  .topbar{padding-top:max(14px,env(safe-area-inset-top))}
  .menu-btn{top:max(12px,env(safe-area-inset-top))}
  .auth-page{padding-top:max(20px,env(safe-area-inset-top));padding-bottom:max(20px,env(safe-area-inset-bottom))}
  .content{padding-bottom:max(40px,env(safe-area-inset-bottom))}
  .sidebar-footer{padding-bottom:max(12px,env(safe-area-inset-bottom))}
}