:root{--color-background:#0a0a0a;--color-surface:#141414;--color-surface-elevated:#1a1a1a;--color-text-primary:#ffffff;--color-text-secondary:#a0a0a0;--color-text-tertiary:#666666;--color-accent:#667eea;--color-accent-soft:#764ba2;--color-success:#4caf50;--color-danger:#f44336;--color-warning:#ff9800;--spacing-unit:8px;--border-radius:16px;--transition-timing:cubic-bezier(0.4,0,0.2,1);}[data-theme="light"]{--color-background:#f0f2f5;--color-surface:#ffffff;--color-surface-elevated:#e9ecef;--color-text-primary:#1a1a1a;--color-text-secondary:#4a4a4a;--color-text-tertiary:#6b6b6b;}*{margin:0;padding:0;box-sizing:border-box;}body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background-color:var(--color-background);color:var(--color-text-primary);min-height:100vh;min-height:100dvh;padding:calc(var(--spacing-unit) * 3);padding-bottom:100px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;}.container{max-width:800px;margin:0 auto;}header{margin-bottom:calc(var(--spacing-unit) * 4);display:flex;align-items:center;gap:calc(var(--spacing-unit) * 3);}.back-button{background-color:var(--color-surface);border:1px solid var(--color-surface-elevated);color:var(--color-text-primary);padding:calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);border-radius:calc(var(--border-radius) / 2);cursor:pointer;font-size:0.9375rem;font-family:inherit;transition:all 0.2s var(--transition-timing);}.back-button:hover{background-color:var(--color-surface-elevated);border-color:rgba(255,255,255,0.2);}h1{font-size:clamp(1.75rem,4vw,2.5rem);font-weight:600;letter-spacing:-0.03em;}h2{font-size:1.25rem;font-weight:600;margin-bottom:calc(var(--spacing-unit) * 2);display:flex;align-items:center;gap:calc(var(--spacing-unit) * 1);}.badge{background:var(--color-accent);color:white;padding:2px 10px;border-radius:20px;font-size:0.85rem;font-weight:600;}.guest-warning{background:var(--color-surface);border:1px solid var(--color-warning);border-radius:var(--border-radius);padding:calc(var(--spacing-unit) * 4);text-align:center;margin-bottom:calc(var(--spacing-unit) * 4);}.warning-icon{font-size:4rem;margin-bottom:calc(var(--spacing-unit) * 2);}.warning-content h3{font-size:1.5rem;margin-bottom:calc(var(--spacing-unit) * 1);}.warning-content p{color:var(--color-text-secondary);margin-bottom:calc(var(--spacing-unit) * 3);}.btn-login{background:linear-gradient(135deg,var(--color-accent),var(--color-accent-soft));color:white;border:none;padding:calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 4);border-radius:calc(var(--border-radius) / 2);font-size:1rem;font-weight:600;cursor:pointer;transition:all 0.3s var(--transition-timing);}.btn-login:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(102,126,234,0.4);}.search-section{background:var(--color-surface);border-radius:var(--border-radius);padding:calc(var(--spacing-unit) * 3);margin-bottom:calc(var(--spacing-unit) * 3);}.search-box{display:flex;gap:calc(var(--spacing-unit) * 1.5);}.search-box input{flex:1;background:var(--color-surface-elevated);border:1px solid transparent;border-radius:calc(var(--border-radius) / 2);padding:calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);color:var(--color-text-primary);font-size:1rem;font-family:inherit;transition:all 0.2s var(--transition-timing);}.search-box input:focus{outline:none;border-color:var(--color-accent);box-shadow:0 0 0 3px rgba(102,126,234,0.2);}.search-box input::placeholder{color:var(--color-text-tertiary);}.btn-search{background:linear-gradient(135deg,var(--color-accent),var(--color-accent-soft));color:white;border:none;padding:calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);border-radius:calc(var(--border-radius) / 2);font-size:1rem;font-weight:600;cursor:pointer;transition:all 0.3s var(--transition-timing);}.btn-search:hover{transform:translateY(-2px);box-shadow:0 4px 16px rgba(102,126,234,0.4);}.search-results{margin-top:calc(var(--spacing-unit) * 2);}.search-result-item{display:flex;align-items:center;justify-content:space-between;background:var(--color-surface-elevated);padding:calc(var(--spacing-unit) * 2);border-radius:calc(var(--border-radius) / 2);margin-bottom:calc(var(--spacing-unit) * 1);transition:all 0.2s var(--transition-timing);}.search-result-item:hover{background:rgba(102,126,234,0.1);}.user-info-row{display:flex;align-items:center;gap:calc(var(--spacing-unit) * 2);}.user-avatar{width:48px;height:48px;border-radius:50%;background:var(--color-accent);display:flex;align-items:center;justify-content:center;font-size:1.5rem;overflow:hidden;}.user-avatar img{width:100%;height:100%;object-fit:cover;}.user-details-search{display:flex;flex-direction:column;}.username{font-weight:600;color:var(--color-text-primary);}.display-name{font-size:0.85rem;color:var(--color-text-secondary);}.btn-add-friend{background:var(--color-success);color:white;border:none;padding:calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);border-radius:calc(var(--border-radius) / 2);font-size:0.9rem;font-weight:600;cursor:pointer;transition:all 0.2s var(--transition-timing);}.btn-add-friend:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 12px rgba(76,175,80,0.4);}.btn-add-friend:disabled{opacity:0.6;cursor:not-allowed;}.btn-add-friend.pending{background:var(--color-warning);}.btn-add-friend.already-friends{background:var(--color-text-tertiary);}.requests-section{background:var(--color-surface);border-radius:var(--border-radius);padding:calc(var(--spacing-unit) * 3);margin-bottom:calc(var(--spacing-unit) * 3);}.tabs{display:flex;gap:calc(var(--spacing-unit) * 1);margin-bottom:calc(var(--spacing-unit) * 2);}.tab{background:var(--color-surface-elevated);border:1px solid transparent;color:var(--color-text-secondary);padding:calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2.5);border-radius:calc(var(--border-radius) / 2);font-size:0.9rem;font-weight:500;cursor:pointer;transition:all 0.2s var(--transition-timing);}.tab:hover{background:rgba(102,126,234,0.1);}.tab.active{background:var(--color-accent);color:white;}.tab-content{display:none;}.tab-content.active{display:block;}.requests-list{min-height:60px;}.request-item{display:flex;align-items:center;justify-content:space-between;background:var(--color-surface-elevated);padding:calc(var(--spacing-unit) * 2);border-radius:calc(var(--border-radius) / 2);margin-bottom:calc(var(--spacing-unit) * 1);}.request-actions{display:flex;gap:calc(var(--spacing-unit) * 1);}.btn-accept{background:var(--color-success);color:white;border:none;padding:calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);border-radius:calc(var(--border-radius) / 2);font-size:0.85rem;font-weight:600;cursor:pointer;transition:all 0.2s var(--transition-timing);}.btn-accept:hover{transform:translateY(-2px);}.btn-reject{background:var(--color-danger);color:white;border:none;padding:calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);border-radius:calc(var(--border-radius) / 2);font-size:0.85rem;font-weight:600;cursor:pointer;transition:all 0.2s var(--transition-timing);}.btn-reject:hover{transform:translateY(-2px);}.btn-cancel{background:var(--color-text-tertiary);color:white;border:none;padding:calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);border-radius:calc(var(--border-radius) / 2);font-size:0.85rem;font-weight:600;cursor:pointer;transition:all 0.2s var(--transition-timing);}.btn-cancel:hover{background:var(--color-danger);}.empty-state{text-align:center;padding:calc(var(--spacing-unit) * 4);color:var(--color-text-tertiary);}.empty-state .empty-icon{font-size:3rem;margin-bottom:calc(var(--spacing-unit) * 2);}.friends-section{background:var(--color-surface);border-radius:var(--border-radius);padding:calc(var(--spacing-unit) * 3);}.friends-list{display:grid;gap:calc(var(--spacing-unit) * 1.5);}.friend-card{display:flex;align-items:center;justify-content:space-between;background:var(--color-surface-elevated);padding:calc(var(--spacing-unit) * 2);border-radius:calc(var(--border-radius) / 2);cursor:pointer;transition:all 0.2s var(--transition-timing);border:1px solid transparent;}.friend-card:hover{background:rgba(102,126,234,0.1);border-color:var(--color-accent);transform:translateY(-2px);}.friend-info{display:flex;align-items:center;gap:calc(var(--spacing-unit) * 2);}.friend-avatar{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--color-accent),var(--color-accent-soft));display:flex;align-items:center;justify-content:center;font-size:1.75rem;overflow:hidden;}.friend-avatar img{width:100%;height:100%;object-fit:cover;}.friend-details{display:flex;flex-direction:column;}.friend-name{font-weight:600;font-size:1.1rem;color:var(--color-text-primary);}.friend-username{font-size:0.85rem;color:var(--color-text-secondary);}.friend-since{font-size:0.75rem;color:var(--color-text-tertiary);margin-top:2px;}.friend-action{color:var(--color-accent);font-size:1.5rem;}.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:calc(var(--spacing-unit) * 6);color:var(--color-text-secondary);}.spinner{width:40px;height:40px;border:3px solid var(--color-surface-elevated);border-top-color:var(--color-accent);border-radius:50%;animation:spin 0.8s linear infinite;margin-bottom:calc(var(--spacing-unit) * 2);}@keyframes spin{to{transform:rotate(360deg);}}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.8);display:none;align-items:center;justify-content:center;z-index:10000;padding:calc(var(--spacing-unit) * 2);}.modal.show{display:flex;}.modal-content{background:var(--color-surface);border-radius:var(--border-radius);padding:calc(var(--spacing-unit) * 4);max-width:450px;width:100%;max-height:90vh;position:relative;animation:modalSlideIn 0.3s var(--transition-timing);overflow:hidden;}@keyframes modalSlideIn{from{opacity:0;transform:translateY(-30px) scale(0.95);}to{opacity:1;transform:translateY(0) scale(1);}}.close-modal{position:absolute;top:calc(var(--spacing-unit) * 2);right:calc(var(--spacing-unit) * 2);font-size:1.75rem;color:var(--color-text-secondary);cursor:pointer;line-height:1;transition:color 0.2s var(--transition-timing);}.close-modal:hover{color:var(--color-text-primary);}.modal-header{display:flex;flex-direction:column;align-items:center;gap:calc(var(--spacing-unit) * 2);margin-bottom:calc(var(--spacing-unit) * 4);padding-top:calc(var(--spacing-unit) * 2);}.modal-header .friend-avatar{width:80px;height:80px;font-size:2.5rem;}.modal-header h2{margin:0;font-size:1.5rem;}.modal-stats{background:var(--color-surface-elevated);border-radius:calc(var(--border-radius) / 2);padding:calc(var(--spacing-unit) * 2);margin-bottom:calc(var(--spacing-unit) * 3);overflow:hidden;}.stat-row{display:flex;justify-content:space-between;align-items:center;padding:calc(var(--spacing-unit) * 1.5) 0;border-bottom:1px solid var(--color-surface);}.stat-row:last-child{border-bottom:none;}.stat-label{color:var(--color-text-secondary);font-size:0.95rem;}.stat-value{font-weight:700;font-size:1.1rem;color:var(--color-accent);}.modal-actions{display:flex;justify-content:center;}.btn-danger{background:var(--color-danger);color:white;border:none;padding:calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);border-radius:calc(var(--border-radius) / 2);font-size:0.95rem;font-weight:600;cursor:pointer;transition:all 0.2s var(--transition-timing);}.btn-danger:hover{transform:translateY(-2px);box-shadow:0 4px 16px rgba(244,67,54,0.4);}.toast{position:fixed;bottom:100px;left:50%;transform:translateX(-50%) translateY(100px);background:var(--color-surface);border:1px solid var(--color-surface-elevated);padding:calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);border-radius:var(--border-radius);box-shadow:0 8px 32px rgba(0,0,0,0.3);z-index:10001;opacity:0;transition:all 0.3s var(--transition-timing);}.toast.show{transform:translateX(-50%) translateY(0);opacity:1;}.toast.success{border-color:var(--color-success);}.toast.error{border-color:var(--color-danger);}@media (max-width:768px){body{padding:calc(var(--spacing-unit) * 2);padding-bottom:100px;}header{flex-direction:column;align-items:flex-start;gap:calc(var(--spacing-unit) * 2);}.search-box{flex-direction:column;}.btn-search{width:100%;}.request-item{flex-direction:column;gap:calc(var(--spacing-unit) * 2);align-items:flex-start;}.request-actions{width:100%;}.request-actions button{flex:1;}.friend-card{flex-direction:column;align-items:flex-start;gap:calc(var(--spacing-unit) * 2);}.friend-action{align-self:flex-end;}}@media (max-width:480px){h1{font-size:1.5rem;}.search-section,.requests-section,.friends-section{padding:calc(var(--spacing-unit) * 2);}.modal-content{padding:calc(var(--spacing-unit) * 3);max-height:85vh;}.modal-header{padding-top:0;margin-bottom:calc(var(--spacing-unit) * 2);}.modal-header .friend-avatar{width:60px;height:60px;font-size:2rem;}.modal-header h2{font-size:1.25rem;}.stat-row{padding:calc(var(--spacing-unit) * 1) 0;}.stat-label{font-size:0.85rem;}.stat-value{font-size:1rem;}.modal-stats{padding:calc(var(--spacing-unit) * 1.5);}}.modal-content::-webkit-scrollbar{display:none;}.modal-content{-ms-overflow-style:none;scrollbar-width:none;}