.lesson-section{background:var(--secondary-bg);border-radius:var(--border-radius);border:1px solid var(--neutral-bg,var(--primary));margin-bottom:2rem;padding:2rem 1.5rem 1.5rem;box-shadow:0 2px 8px #2c3e501a}.lesson-section-title{color:var(--primary);letter-spacing:.01em;border-radius:calc(var(--border-radius) / 2);margin-bottom:1.25rem;padding:.5rem 1rem;font-size:1.35rem;font-weight:700;display:inline-block;box-shadow:0 1px 4px #2c3e500f}:root{--white:#fff;--black:#000;--gray100:#e1e1e1;--gray200:#c8c8c8;--gray300:#acacac;--gray400:#919191;--gray500:#6e6e6e;--gray600:#404040;--gray900:#212121;--gray950:#141414;--opaque50:#8ff;--skill-default:darkgray;--skill-beginner:#29618c;--skill-intermediate:#8a7328;--skill-advanced:#8a3228;--skill-pro:#298a28;--tile-background:#f2ece4;--cell-background:#8ff;--placeholder-text:#ccc;--transparent-background:#0000;--primary:#428a6b;--primary-dark:#2e5f4d;--secondary:#7397bc;--primary-bg:#f8fcfa;--secondary-bg:#f1f8f5;--tertiary-bg:#e5f2ef;--accent-bg:#ccc;--card-bg:#fff;--neutral-bg:#b3b3b3;--chip-bg:#ccc;--chip-fg:#404040;--btn-bg:#428a6b;--btn-fg:#fff;--btn-border:#428a6b;--btn-hover-bg:#7397bc;--btn-hover-fg:#fff;--alert:#ad1f1f;--warning:#ae8b1e;--success:#1eae30;--header:#dcd0c0;--text-primary:#000;--text-secondary:#333;--text-tertiary:#666;--text-neutral:#999;--border-radius:8px;--font-family:"Open Sans", "Segoe UI", "Roboto", Arial, sans-serif;--shadow-card:0 2px 8px #2c3e5014;--shadow-card-hover:0 4px 16px #2c3e5024;--primary-focus-ring:#428a6b33}:root.theme-dark{--white:#fff;--black:#000;--gray100:#1a1a1a;--gray200:#333;--gray300:#4d4d4d;--gray400:#666;--gray500:gray;--gray600:#999;--gray900:#b3b3b3;--gray950:#ccc;--opaque50:#8000;--blue300accent:#a7cbf6;--skill-default:darkgray;--skill-beginner:#29618c;--skill-intermediate:#8a7328;--skill-advanced:#8a3228;--skill-pro:#298a28;--tile-background:transparent;--cell-background:#8ff;--placeholder-text:#999;--transparent-background:#0000;--primary:#72bb9c;--secondary:#7397bc;--primary-bg:#030705;--secondary-bg:#050b08;--tertiary-bg:#0a0f0d;--accent-bg:#333;--card-bg:#232634;--neutral-bg:#3e3e3e;--chip-bg:#35384a;--chip-fg:#f5f6fa;--btn-bg:#7397bc;--btn-fg:#fff;--btn-border:#72bb9c;--btn-hover-bg:#7397bc;--btn-hover-fg:#fff;--alert:#e04d4d;--warning:#e0bb4d;--success:#4de05f;--header:#dcd0c0;--text-primary:#fff;--text-secondary:#ccc;--text-tertiary:#999;--text-neutral:#666;--border-radius:8px;--font-family:"Open Sans", "Segoe UI", "Roboto", Arial, sans-serif}body,.store-container{background:var(--primary-bg);font-family:var(--font-family)}.store-title{color:var(--text-primary);font-weight:700;font-family:var(--font-family);margin-bottom:24px;font-size:2rem}.card{border:1px solid var(--neutral-bg,var(--primary));flex-direction:column;transition:box-shadow .2s;display:flex;box-shadow:0 2px 8px #2c3e501f;background:var(--secondary-bg)!important}.card:hover{box-shadow:0 4px 16px #2c3e5029}.MuiCardContent-root{padding-bottom:16px!important}.MuiChip-root{background:var(--chip-bg);color:var(--chip-fg);font-weight:500}.card .MuiTypography-h6{font-family:var(--font-family);font-size:1.25rem;font-weight:600;box-shadow:none!important;background:0 0!important;border:none!important}.card .MuiTypography-body2{opacity:.8}.card .MuiChip-root{margin-bottom:.25rem;margin-right:.25rem}.card .MuiCardMedia-root{border-top-left-radius:var(--border-radius);border-top-right-radius:var(--border-radius)}.maui-btn,.MuiButton-root{font-family:var(--font-family);border-radius:var(--border-radius);border:1px solid var(--btn-border);min-width:44px;min-height:32px;padding:8px 16px;font-size:1rem;transition:background .2s,color .2s;background:var(--primary-bg)!important}.maui-btn:hover,.MuiButton-root:hover{background:var(--btn-hover-bg);color:var(--primary)}.maui-label,.MuiTypography-root{color:var(--text-primary);font-family:var(--font-family)}.MuiGrid-root{row-gap:16px}a{color:#646cff;-webkit-text-decoration:inherit;text-decoration:inherit;font-weight:500}a:hover{color:#535bf2}h1{font-size:3.2em;line-height:1.1}.pnp-card{background-color:var(--card-bg);border:none;border-radius:12px;margin:16px 0;padding:16px;box-shadow:0 4px 8px #0000001a}.pnp-card:hover{box-shadow:0 8px 16px #00000026}.pnp-card-avatar{border-radius:50%;width:48px;height:48px;margin-right:12px}.pnp-card-title{color:var(--text-primary);margin-bottom:8px;font-size:1.5em;font-weight:600}.pnp-card-description{color:var(--text-tertiary);margin-top:12px;font-size:.9em}.pnp-card-actions{justify-content:flex-end;gap:8px;margin-top:16px;display:flex}.pnp-card-action-button{background-color:var(--btn-bg);color:var(--btn-fg);border:1px solid var(--btn-border);cursor:pointer;border-radius:6px;padding:8px 12px;font-size:.9em;transition:background-color .2s,color .2s}.pnp-card-action-button:hover{background-color:var(--btn-hover-bg);color:var(--btn-hover-fg)}.pnp-card-custom-actions-popper{z-index:1300}.pnp-card-custom-actions-menu{background-color:var(--card-bg);border-radius:8px;box-shadow:0 4px 12px #0000001a}.action-button-destructive{border:1px solid var(--alert);color:var(--alert)!important}.tile-button{border-radius:var(--border-radius);border:1px solid var(--primary);align-items:center;gap:8px;font-size:1rem;line-height:1.2;display:flex;color:var(--text-primary)!important;background-color:var(--tertiary-bg)!important}.tile-button .tile-button-icon{filter:none;color:var(--primary);transition:filter .2s}.tile-button:hover{transition:background-color .2s,color .2s;background-color:var(--primary)!important;color:var(--white)!important}.tile-button:hover .tile-button-icon{filter:brightness(0)invert();transition:filter .2s}