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#0284c740}.chevron-icon{transition:transform .3s cubic-bezier(.4,0,.2,1)}.chevron-icon.expanded,.chevron-icon.open{transform:rotate(180deg)}body.dark-theme .btn-accordion-toggle,[data-theme=dark] .btn-accordion-toggle,body.dark-theme .btn-q-toggle,[data-theme=dark] .btn-q-toggle{background:#1e293b;border-color:#334155;color:#38bdf8}body.dark-theme .btn-accordion-toggle:hover,[data-theme=dark] .btn-accordion-toggle:hover,body.dark-theme .btn-q-toggle:hover,[data-theme=dark] .btn-q-toggle:hover,body.dark-theme .btn-accordion-toggle.expanded,[data-theme=dark] .btn-accordion-toggle.expanded,body.dark-theme .btn-q-toggle.open,[data-theme=dark] .btn-q-toggle.open{background:#0284c7;color:#fff;border-color:#38bdf8}.btn-check-toggle{width:28px;height:28px;border-radius:50%;background:var(--bg-card, #ffffff);border:2px solid #cbd5e1;color:#94a3b8;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);flex-shrink:0;padding:0}.btn-check-toggle:hover{border-color:#0284c7;color:#0284c7;background:#e0f2fe;transform:scale(1.08)}.btn-check-toggle.checked{background:linear-gradient(135deg,#10b981,#059669);border-color:#10b981;color:#fff;box-shadow:0 3px 10px #10b98159}.btn-check-toggle.checked:hover{background:linear-gradient(135deg,#059669,#047857);border-color:#059669;box-shadow:0 4px 12px #10b98173}.icon-check-svg{transition:transform .25s cubic-bezier(.175,.885,.32,1.275)}.btn-check-toggle.checked .icon-check-svg{transform:scale(1.1)}body.dark-theme .btn-check-toggle,[data-theme=dark] .btn-check-toggle{background:#1e293b;border-color:#334155;color:#64748b}body.dark-theme .btn-check-toggle:hover,[data-theme=dark] .btn-check-toggle:hover{background:#0284c733;border-color:#38bdf8;color:#38bdf8}body.dark-theme .btn-check-toggle.checked,[data-theme=dark] 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pulseGlow{0%{transform:scale(.8);opacity:.15}to{transform:scale(1.2);opacity:.4}}.floating-logo{position:relative;width:80px;height:auto;object-fit:contain;z-index:2;animation:float 6s infinite ease-in-out}body.dark-theme .floating-logo{filter:brightness(0) invert(1)}@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-10px)}to{transform:translateY(0)}}.gradient-text{font-size:2.5rem;font-weight:800;margin-bottom:16px;letter-spacing:-.02em;line-height:1.2;background:linear-gradient(135deg,#1e293b,#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}body.dark-theme .gradient-text{background:linear-gradient(135deg,#fff,#93c5fd);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.maintenance-message{font-size:1.125rem;color:#475569;line-height:1.7;margin-bottom:40px;max-width:600px}.maintenance-message strong{color:#1e293b;font-weight:700}body.dark-theme .maintenance-message{color:#cbd5e1}body.dark-theme .maintenance-message strong{color:#f8fafc}.maintenance-actions{display:flex;justify-content:center;margin-bottom:32px}.btn-premium-retry{display:flex;align-items:center;justify-content:center;gap:10px;background:linear-gradient(135deg,var(--primary-color, #3b82f6) 0%,#2563eb 100%);color:#fff;border:none;padding:14px 32px;border-radius:99px;font-size:1.05rem;font-weight:600;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 15px #3b82f64d,inset 0 1px #fff3}.btn-premium-retry:hover{transform:translateY(-3px) scale(1.02);box-shadow:0 8px 25px #3b82f666,inset 0 1px #fff3}.btn-premium-retry:active{transform:translateY(1px) scale(.98)}.retry-icon{transition:transform .5s cubic-bezier(.4,0,.2,1)}.btn-premium-retry:hover .retry-icon{transform:rotate(180deg)}.maintenance-footer{border-top:1px solid rgba(0,0,0,.08);padding-top:24px;font-size:.9rem;color:#94a3b8;font-weight:500}body.dark-theme .maintenance-footer{border-top-color:#ffffff14;color:#64748b}:root{--primary-color: #0d6efd;--primary-hover: #0b5ed7;--secondary-color: #f8f9fa;--bg-main: #ffffff;--bg-surface: #ffffff;--bg-sidebar: #f8f9fa;--bg-navbar: #ffffff;--text-main: #212529;--text-muted: #6c757d;--text-inverse: #ffffff;--border-color: #dee2e6;--border-radius-sm: 8px;--border-radius-md: 12px;--border-radius-lg: 20px;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .05);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .1);--base-navbar-height: 70px;--banner-height: 0px;--navbar-height: calc(var(--base-navbar-height) + var(--banner-height));--sidebar-width: 280px;--transition-speed: .3s}body.sidebar-desktop-collapsed{--sidebar-width: 76px}body.dark-theme{--primary-color: #3b82f6;--primary-hover: #60a5fa;--secondary-color: #1e293b;--bg-main: #0B1120;--bg-surface: #1e293b;--bg-sidebar: #131B2C;--bg-navbar: #0B1120;--text-main: #f1f5f9;--text-muted: #94a3b8;--text-inverse: #0B1120;--border-color: #334155;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .2);--shadow-md: 0 4px 12px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .4)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-main);color:var(--text-main);line-height:1.6;transition:background-color var(--transition-speed) ease,color var(--transition-speed) ease;overflow-x:hidden;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}ul{list-style:none}button{cursor:pointer;font-family:Inter,sans-serif}.btn-primary{background-color:var(--primary-color);color:#fff;border:none;padding:10px 24px;border-radius:var(--border-radius-sm);font-weight:600;font-size:1rem;transition:all .2s ease;box-shadow:0 4px 6px #0d6efd33}.btn-primary:hover{background-color:var(--primary-hover);transform:translateY(-2px);box-shadow:0 6px 12px #0d6efd4d}body.dark-theme .btn-primary{color:#fff;box-shadow:0 4px 6px #3b82f64d}.btn-primary-large{background-color:var(--primary-color);color:#fff;border:none;padding:14px 32px;border-radius:var(--border-radius-sm);font-weight:600;font-size:1.1rem;transition:all .2s ease;box-shadow:0 4px 6px #0d6efd33;display:inline-flex;align-items:center;justify-content:center}.btn-primary-large:hover:not(:disabled){background-color:var(--primary-hover);transform:translateY(-2px);box-shadow:0 6px 12px #0d6efd4d}.btn-primary-large:disabled{background-color:#93c5fd;cursor:not-allowed;transform:none;box-shadow:none}body.dark-theme .btn-primary-large{color:#fff;box-shadow:0 4px 6px #3b82f64d}body.dark-theme .btn-primary-large:disabled{background-color:#3b82f6;opacity:.6}.app-container{display:flex;flex-direction:column;min-height:100vh}.learning-environment{display:flex;flex:1;margin-top:var(--navbar-height);position:relative;transition:margin-top .3s cubic-bezier(.4,0,.2,1)}.content-area{flex:1;background-color:var(--bg-main);display:flex;flex-direction:column;min-height:calc(100vh - var(--navbar-height));margin-left:var(--sidebar-width);transition:margin-left var(--transition-speed) ease,min-height .3s cubic-bezier(.4,0,.2,1)}@media (max-width: 900px){.learning-environment{flex-direction:column}.content-area{margin-left:0}}.header-top{display:flex;justify-content:flex-start;margin-bottom:2rem;width:100%}.btn-back-home{background:#2563eb0d;color:#2563eb;border:1px solid rgba(37,99,235,.2);padding:.6rem 1.2rem;border-radius:8px;font-weight:600;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;gap:.5rem}.btn-back-home:hover{background:#2563eb;color:#fff;transform:translate(-5px);box-shadow:0 4px 12px #2563eb33}@media (max-width: 768px){.header-top{margin-bottom:1.5rem}}