:root{--primary: #4F46E5;--primary-hover: #4338CA;--private-event: #3B82F6;--group-event: #10B981;--background: #F9FAFB;--surface: #FFFFFF;--text-primary: #111827;--text-secondary: #6B7280;--border: #E5E7EB;--danger: #EF4444;--danger-hover: #DC2626;--radius: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .1)}.dark{--primary: #818CF8;--primary-hover: #6366F1;--private-event: #60A5FA;--group-event: #34D399;--background: #111827;--surface: #1F2937;--text-primary: #F9FAFB;--text-secondary: #9CA3AF;--border: #374151;--danger: #F87171;--danger-hover: #EF4444;--shadow: 0 1px 3px rgba(0, 0, 0, .3)}.dark body{background:var(--background);color:var(--text-primary)}.dark .calendar,.dark .auth-form,.dark .group-card,.dark .member,.dark .month-grid,.dark .month-day{background:var(--surface)}.dark .form-group input,.dark .form-group textarea,.dark .form-group select{background:var(--surface);color:var(--text-primary);border-color:var(--border)}.dark .cancel-btn{background:var(--border);color:var(--text-primary)}.dark .invite-link input{background:var(--surface);color:var(--text-primary);border-color:var(--border)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--background);color:var(--text-primary);line-height:1.5;min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column;padding-bottom:60px}.page{flex:1;padding:16px}.page-header{display:flex;align-items:center;gap:12px;margin-bottom:20px}.page-header h1{font-size:24px;font-weight:600}.loading{display:flex;justify-content:center;align-items:center;height:200px;color:var(--text-secondary)}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.auth-container{width:100%;max-width:400px}.auth-container h1{text-align:center;margin-bottom:24px;color:var(--primary)}.auth-form{background:var(--surface);padding:24px;border-radius:var(--radius);box-shadow:var(--shadow)}.auth-form h2{font-size:20px;margin-bottom:20px}.auth-success{text-align:center;padding:40px 20px}.auth-success h2{color:var(--group-event);margin-bottom:12px}.auth-switch{text-align:center;margin-top:16px;color:var(--text-secondary)}.auth-switch a{color:var(--primary);text-decoration:none}.auth-switch a:hover{text-decoration:underline}.form-group{margin-bottom:16px}.form-group label{display:block;margin-bottom:6px;font-weight:500;font-size:14px}.form-group input,.form-group textarea,.form-group select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:16px;background:var(--surface)}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.error{color:var(--danger);font-size:14px;margin-bottom:12px;padding:10px;background:#fee2e2;border-radius:var(--radius)}.success{color:var(--group-event);font-size:14px;margin-bottom:12px;padding:10px;background:#d1fae5;border-radius:var(--radius)}button{cursor:pointer;border:none;padding:12px 20px;border-radius:var(--radius);font-size:16px;font-weight:500;transition:background .2s}button:disabled{opacity:.6;cursor:not-allowed}.primary-btn,.save-btn{background:var(--primary);color:#fff}.primary-btn:hover,.save-btn:hover:not(:disabled){background:var(--primary-hover)}.danger-btn{background:var(--danger);color:#fff}.danger-btn:hover:not(:disabled){background:var(--danger-hover)}.calendar{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.calendar-header{display:flex;align-items:center;padding:12px;border-bottom:1px solid var(--border);gap:8px}.calendar-header .nav-btn{padding:8px 12px;background:transparent}.calendar-header .nav-btn:hover{background:var(--background)}.calendar-header .today-btn{margin-left:auto;padding:6px 12px;font-size:14px;background:var(--background)}.current-period{flex:1;text-align:center}.current-period .date{font-weight:600}.view-toggle{display:flex;gap:4px}.view-toggle button{padding:6px 12px;font-size:14px;background:transparent;color:var(--text-secondary)}.view-toggle button.active{background:var(--primary);color:#fff}.week-view{overflow-x:auto}.week-header{display:grid;grid-template-columns:repeat(7,1fr);border-bottom:1px solid var(--border)}.day-header{padding:12px 8px;text-align:center;font-size:12px}.day-header.today{background:#4f46e51a}.day-name{display:block;color:var(--text-secondary);text-transform:uppercase}.day-number{display:block;font-size:18px;font-weight:600}.week-body{display:grid;grid-template-columns:repeat(7,1fr);min-height:400px}.day-column{border-right:1px solid var(--border);padding:4px;min-height:100px;cursor:pointer}.day-column:last-child{border-right:none}.day-column.today{background:#4f46e50d}.day-column:hover{background:var(--background)}.day-view{padding:16px}.day-header-single{text-align:center;margin-bottom:20px}.day-header-single .day-name{display:block;font-size:14px;color:var(--text-secondary)}.day-header-single .day-number{display:block;font-size:24px;font-weight:600}.day-body{display:flex;flex-direction:column}.hour-row{display:flex;min-height:50px;border-bottom:1px solid var(--border)}.hour-label{width:60px;padding:4px 8px;font-size:12px;color:var(--text-secondary);flex-shrink:0}.hour-content{flex:1;padding:2px;cursor:pointer}.hour-content:hover{background:var(--background)}.month-view{padding:16px}.month-header{display:grid;grid-template-columns:repeat(7,1fr);gap:1px;margin-bottom:8px}.month-day-name{text-align:center;font-weight:600;font-size:12px;color:var(--text-secondary);padding:8px}.month-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.month-day{background:var(--surface);min-height:100px;padding:4px;cursor:pointer}.month-day:hover,.month-day.other-month{background:var(--background)}.month-day.other-month .day-number{color:var(--text-secondary)}.month-day.today{background:#4f46e51a}.month-day .day-number{font-size:14px;font-weight:500;margin-bottom:4px}.month-day.today .day-number{background:var(--primary);color:#fff;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center}.day-events{display:flex;flex-direction:column;gap:2px}.month-event{font-size:11px;padding:2px 4px;border-radius:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;cursor:pointer}.month-event.private{background:#3b82f633;color:var(--private-event)}.month-event.group{background:#10b98133;color:var(--group-event)}.more-events{font-size:10px;color:var(--text-secondary);padding:2px 4px}.event{padding:4px 6px;border-radius:4px;font-size:12px;margin-bottom:2px;cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.event.private{background:#3b82f633;color:var(--private-event);border-left:3px solid var(--private-event)}.event.group{background:#10b98133;color:var(--group-event);border-left:3px solid var(--group-event)}.event:hover{opacity:.8}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;padding:20px;z-index:100}.modal{background:var(--surface);border-radius:var(--radius);width:100%;max-width:450px;max-height:90vh;overflow-y:auto}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--border)}.modal-header h2{font-size:18px}.close-btn{background:transparent;padding:4px;font-size:24px;line-height:1;color:var(--text-secondary)}.modal form{padding:20px}.modal-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:20px}.delete-btn{background:var(--danger);color:#fff;margin-right:auto}.cancel-btn{background:var(--background);color:var(--text-primary)}.fab{position:fixed;bottom:80px;right:20px;width:56px;height:56px;border-radius:50%;background:var(--primary);color:#fff;font-size:32px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px #4f46e566;z-index:50}.fab:hover{background:var(--primary-hover)}.bottom-nav{position:fixed;bottom:0;left:0;right:0;display:flex;background:var(--surface);border-top:1px solid var(--border);z-index:50}.bottom-nav a{flex:1;display:flex;flex-direction:column;align-items:center;padding:12px;color:var(--text-secondary);text-decoration:none;font-size:12px}.bottom-nav a.active{color:var(--primary)}.nav-icon{font-size:20px;margin-bottom:4px}.add-btn{width:40px;height:40px;border-radius:50%;background:var(--primary);color:#fff;font-size:24px;display:flex;align-items:center;justify-content:center;padding:0}.groups-list{display:flex;flex-direction:column;gap:12px}.group-card{display:flex;align-items:center;gap:12px;background:var(--surface);padding:16px;border-radius:var(--radius);box-shadow:var(--shadow);cursor:pointer}.group-card:hover{background:var(--background)}.group-icon{width:48px;height:48px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:600}.group-info{flex:1}.group-info h3{font-size:16px;font-weight:600}.group-info p{font-size:14px;color:var(--text-secondary)}.group-card .arrow{color:var(--text-secondary);font-size:20px}.empty-state{text-align:center;padding:60px 20px}.empty-state p{color:var(--text-secondary);margin-bottom:20px}.back-btn{background:transparent;padding:8px 12px;font-size:20px}.group-description{color:var(--text-secondary);margin-bottom:20px}.section{margin-bottom:24px}.section h2{font-size:18px;margin-bottom:12px}.members-list{display:flex;flex-direction:column;gap:8px}.member{display:flex;align-items:center;gap:12px;padding:12px;background:var(--surface);border-radius:var(--radius)}.member-avatar{width:40px;height:40px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600}.member-info{display:flex;flex-direction:column}.member-name{font-weight:500}.member-role{font-size:12px;color:var(--text-secondary);text-transform:capitalize}.section.actions{display:flex;flex-direction:column;gap:12px}.invite-content{padding:20px}.invite-content p{margin-bottom:16px;color:var(--text-secondary)}.invite-link{display:flex;gap:8px}.invite-link input{flex:1;padding:10px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;background:var(--background)}.copy-btn{padding:10px 16px;background:var(--primary);color:#fff}.invite-note{font-size:12px;margin-top:12px}.profile-section{margin-bottom:24px;text-align:center}.user-avatar{width:80px;height:80px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:32px;font-weight:600;margin:0 auto 12px}.user-email{color:var(--text-secondary)}.profile-form{max-width:400px;margin:0 auto}.profile-form button{width:100%}.profile-section.danger{border-top:1px solid var(--border);padding-top:24px}.profile-section.danger button{width:100%}.success-message{text-align:center;padding:60px 20px}.success-message h2{color:var(--group-event);margin-bottom:12px}.error-message{text-align:center;padding:60px 20px}.error-message h2{color:var(--danger);margin-bottom:12px}.error-message .primary-btn{display:inline-block;margin-top:20px;text-decoration:none}.auth-required{text-align:center;padding:60px 20px}.auth-required p{margin-bottom:20px;color:var(--text-secondary)}.auth-required .primary-btn{display:inline-block;text-decoration:none}@media (min-width: 768px){.app{max-width:800px;margin:0 auto}.page{padding:24px}}