.sidebar{width:260px;height:100vh;background-color:var(--bg-primary);border-right:1px solid var(--glass-border);display:flex;flex-direction:column;padding:var(--spacing-md);position:fixed;left:0;top:0;z-index:50;transition:width .3s ease}.sidebar-header{padding:var(--spacing-sm) var(--spacing-sm) var(--spacing-lg);display:flex;align-items:center;gap:var(--spacing-sm)}.app-logo{font-size:1.25rem;font-weight:600;color:var(--text-primary)}.nav-list{list-style:none;display:flex;flex-direction:column;gap:var(--spacing-xs);flex:1}.nav-item{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-sm);color:var(--text-secondary);text-decoration:none;transition:all .2s ease;font-size:.95rem}.nav-item:hover,.nav-item.active{background-color:var(--bg-tertiary);color:var(--text-primary)}.user-profile{margin-top:auto;padding:var(--spacing-md) var(--spacing-sm);border-top:1px solid var(--glass-border);display:flex;align-items:center;gap:var(--spacing-md);color:var(--text-primary);cursor:pointer}.avatar{width:32px;height:32px;border-radius:50%;background-color:var(--bg-tertiary);display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:600}.activity-grid{display:grid;grid-template-columns:1fr;gap:var(--spacing-lg)}@media (min-width: 768px){.activity-grid{grid-template-columns:1fr 1fr}}.form-group{margin-bottom:var(--spacing-md)}.form-label{display:block;font-size:.9rem;color:var(--text-secondary);margin-bottom:var(--spacing-xs)}.form-input,.form-select{width:100%;padding:var(--spacing-md);background:var(--bg-tertiary);border:1px solid var(--glass-border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:1rem;outline:none;transition:border-color .2s}.form-input:focus,.form-select:focus{border-color:var(--accent-blue)}.btn-primary{width:100%;padding:var(--spacing-md);background:var(--accent-blue-gradient);color:#fff;border-radius:var(--radius-sm);font-weight:600;margin-top:var(--spacing-sm);transition:opacity .2s}.btn-primary:hover{opacity:.9}.activity-card{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md);background:var(--bg-secondary);border-radius:var(--radius-md);margin-bottom:var(--spacing-sm);border:1px solid var(--glass-border)}.activity-icon{width:40px;height:40px;border-radius:50%;background:var(--bg-tertiary);display:flex;align-items:center;justify-content:center;margin-right:var(--spacing-md);color:var(--accent-blue)}:root{--bg-primary: #0f0f12;--bg-secondary: #1c1c1e;--bg-tertiary: #2c2c2e;--text-primary: #ffffff;--text-secondary: #ebebf599;--text-tertiary: #ebebf54d;--accent-blue: #0a84ff;--accent-blue-gradient: linear-gradient(135deg, #0a84ff 0%, #5e5ce6 100%);--accent-orange: #ff9f0a;--accent-orange-gradient: linear-gradient(135deg, #ff9f0a 0%, #ff375f 100%);--glass-bg: rgba(28, 28, 30, .6);--glass-border: rgba(255, 255, 255, .1);--glass-blur: blur(20px);--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 20px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{text-decoration:none;color:inherit}button{border:none;background:none;cursor:pointer;font-family:inherit}.glass-panel{background:var(--glass-bg);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--radius-lg)}.flex-center{display:flex;align-items:center;justify-content:center}.text-gradient{background:var(--accent-blue-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent}