:root{--primary: #6366f1;--primary-dark: #4f46e5;--primary-light: #818cf8;--accent: #ec4899;--accent-dark: #db2777;--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--surface: rgba(255, 255, 255, .05);--surface-hover: rgba(255, 255, 255, .08);--text-primary: #f1f5f9;--text-secondary: #cbd5e1;--text-muted: #94a3b8;--border: rgba(148, 163, 184, .15);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 16px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5);--radius: 12px;--radius-sm: 8px;--radius-lg: 16px}[data-theme=light]{--bg-primary: #f8fafc;--bg-secondary: #f1f5f9;--bg-tertiary: #e2e8f0;--surface: rgba(0, 0, 0, .03);--surface-hover: rgba(0, 0, 0, .06);--text-primary: #0f172a;--text-secondary: #334155;--text-muted: #64748b;--border: rgba(15, 23, 42, .12);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .08);--shadow-md: 0 4px 16px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .12)}*{box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;margin:0;background:linear-gradient(135deg,#0f172a,#1e293b,#0f172a);background-attachment:fixed;color:var(--text-primary);line-height:1.6;min-height:100vh;transition:background .3s ease,color .3s ease}[data-theme=light] body{background:linear-gradient(135deg,#f8fafc,#e2e8f0,#f8fafc)}.app-shell{min-height:100vh;display:flex;flex-direction:column}.top-nav{display:flex;align-items:center;justify-content:space-between;padding:1rem 2rem;background:#0f172acc;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;transition:all .3s ease}.top-nav:hover{background:#0f172af2;box-shadow:var(--shadow-md)}.brand a{font-weight:700;font-size:1.5rem;background:linear-gradient(135deg,var(--primary-light) 0%,var(--accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-decoration:none;transition:all .3s ease;letter-spacing:-.5px}.brand a:hover{filter:brightness(1.2);transform:translateY(-1px)}.nav-links{display:flex;align-items:center;gap:.5rem}.nav-links a{color:var(--text-secondary);text-decoration:none;padding:.6rem 1.2rem;border-radius:var(--radius-sm);transition:all .3s ease;font-weight:500;position:relative;overflow:hidden}.nav-links a:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,var(--primary) 0%,var(--accent) 100%);opacity:0;transition:opacity .3s ease;z-index:-1}.nav-links a:hover{color:var(--text-primary);transform:translateY(-2px)}.nav-links a:hover:before{opacity:.15}.logout-btn{background:linear-gradient(135deg,var(--accent) 0%,var(--accent-dark) 100%);color:var(--text-primary);border:none;padding:.6rem 1.5rem;border-radius:var(--radius-sm);cursor:pointer;font-weight:600;transition:all .3s ease;box-shadow:0 2px 8px #ec48994d}.logout-btn:hover{transform:translateY(-2px);box-shadow:0 4px 16px #ec489980}.main-content{padding:2rem 2rem 4rem;max-width:1000px;margin:0 auto;width:100%;flex:1;animation:fadeIn .5s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideDown{0%{opacity:0;max-height:0;padding-top:0;padding-bottom:0}to{opacity:1;max-height:2000px;padding-top:1.25rem;padding-bottom:1.25rem}}h1{font-size:2.5rem;margin-top:0;background:linear-gradient(135deg,var(--text-primary) 0%,var(--primary-light) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-weight:800;letter-spacing:-1px;margin-bottom:1.5rem}h2{color:var(--primary-light);font-size:1.5rem;font-weight:700;margin-top:2rem;margin-bottom:1rem;letter-spacing:-.5px}ul.skill-tree{list-style:none;padding-left:0}ul.skill-tree li{margin:.4rem 0;transition:transform .2s ease}ul.skill-tree li:hover{transform:translate(4px)}ul.skill-tree li.cycle a{color:#fbbf24;filter:drop-shadow(0 0 8px rgba(251,191,36,.3))}a{color:var(--primary-light);text-decoration:none;transition:all .3s ease;position:relative}a:hover{color:var(--accent);text-decoration:none}button{font:inherit;cursor:pointer}input{font:inherit;padding:.75rem 1rem;width:100%;background:var(--surface);border:1px solid var(--border);color:var(--text-primary);border-radius:var(--radius-sm);transition:all .3s ease}input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #6366f133;background:var(--surface-hover)}input::placeholder{color:var(--text-muted)}form button{margin-top:1rem;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);border:none;color:var(--text-primary);padding:.75rem 1.5rem;border-radius:var(--radius-sm);cursor:pointer;font-weight:600;transition:all .3s ease;box-shadow:0 2px 8px #6366f14d;width:100%}form button:hover{transform:translateY(-2px);box-shadow:0 4px 16px #6366f180}section{margin-top:2rem;padding:1.5rem;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);transition:all .3s ease}section:hover{background:var(--surface-hover);border-color:#94a3b840;box-shadow:var(--shadow-sm)}.center{display:flex;align-items:center;justify-content:center;min-height:50vh;font-size:1.2rem;color:var(--text-secondary)}.exercise-list{display:flex;flex-direction:column;gap:.75rem}.exercise-list li{background:#6366f10d;border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;transition:all .3s ease}.exercise-list li:hover{border-color:var(--primary);box-shadow:0 4px 12px #6366f133;transform:translateY(-2px)}.exercise-list button{background:transparent;border:none;padding:1rem 1.25rem;text-align:left;cursor:pointer;font:inherit;color:var(--text-primary);transition:all .3s ease}.exercise-list button:hover{background:#6366f11a}*{transition-property:background-color,border-color,color,transform,box-shadow;transition-duration:.3s;transition-timing-function:ease}p,span,div{transition:none}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--primary)}mark,.highlight-blue,.highlight-yellow{background:transparent!important;color:inherit!important}.skill-detailed-description mark,.exercise-detailed-description mark{background:transparent!important;color:inherit!important}.skill-detailed-description li.goal-item{position:relative;padding-right:3rem;margin-bottom:.5rem}.copy-goal-btn{background:#6366f11a;border:1px solid rgba(99,102,241,.3);border-radius:6px;padding:.25rem .5rem;font-size:1rem;cursor:pointer;transition:all .2s ease;height:28px;min-width:32px;display:inline-flex;align-items:center;justify-content:center;position:absolute;right:0;top:0;margin-left:.5rem}.copy-goal-btn:hover{background:#6366f133;border-color:var(--primary);transform:scale(1.05)}.copy-goal-btn:active{transform:scale(.95)}.theme-toggle-btn{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.6rem 1rem;font-size:1.2rem;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center;min-width:44px}.theme-toggle-btn:hover{background:var(--surface-hover);border-color:var(--primary);transform:translateY(-2px)}.theme-toggle-btn:active{transform:translateY(0)}