:root{--bg-color: #0f172a;--surface-color: #1e293b;--primary-color: #3b82f6;--primary-hover: #2563eb;--primary-color-alpha: rgba(59, 130, 246, .1);--text-color: #f8fafc;--text-secondary: #94a3b8;--border-color: #334155;--error-color: #ef4444;--success-color: #22c55e;font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.5;font-weight:400;color-scheme:dark}[data-theme=light]{--bg-color: #f1f5f9;--surface-color: #ffffff;--text-color: #0f172a;--text-secondary: #64748b;--border-color: #cbd5e1;--primary-color: #2563eb;--primary-hover: #1d4ed8;--primary-color-alpha: rgba(37, 99, 235, .1);color-scheme:light}body{margin:0;background-color:var(--bg-color);color:var(--text-color);min-height:100vh}*{box-sizing:border-box}h1,h2,h3,h4,h5,h6{color:var(--text-color)}button{font-family:inherit}.auth-container{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--bg-color);padding:1rem}.auth-header{font-size:2.5rem;font-weight:800;margin-bottom:2rem;background:linear-gradient(to right,#3b82f6,#8b5cf6);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-1px}.auth-box{background:var(--surface-color);padding:2.5rem;border-radius:16px;box-shadow:0 10px 25px -5px #0000004d;width:100%;max-width:420px;border:1px solid var(--border-color)}.auth-tabs{display:flex;margin-bottom:2rem;background:var(--bg-color);padding:.3rem;border-radius:8px}.auth-tabs button{flex:1;background:transparent;border:none;padding:.6rem;border-radius:6px;color:var(--text-secondary);font-weight:500;cursor:pointer;transition:all .2s}.auth-tabs button.active{background:var(--surface-color);color:var(--text-color);box-shadow:0 2px 4px #0000001a}.auth-form{display:flex;flex-direction:column;gap:1rem}.auth-form input{padding:.8rem 1rem;border-radius:8px;border:1px solid var(--border-color);background:var(--bg-color);color:var(--text-color);font-size:1rem;transition:border-color .2s}.auth-form input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px var(--primary-color-alpha)}.auth-form button[type=submit]{margin-top:1rem;padding:.9rem;border-radius:8px;border:none;background:var(--primary-color);color:#fff;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s}.auth-form button[type=submit]:hover{background:var(--primary-hover)}.auth-form button:disabled{opacity:.7;cursor:not-allowed}.auth-error{color:var(--error-color);font-size:.9rem;text-align:center;padding:.5rem;background:#ef44441a;border-radius:6px}.dashboard-container{display:flex;min-height:100vh;background-color:var(--bg-color);color:var(--text-color)}.sidebar{width:250px;background-color:var(--surface-color);padding:2rem;border-right:1px solid var(--border-color);display:flex;flex-direction:column}.sidebar-header{font-size:1.5rem;font-weight:700;margin-bottom:2rem;color:var(--primary-color)}.sidebar-nav button{display:block;width:100%;text-align:left;padding:.75rem 1rem;margin-bottom:.5rem;background:transparent;border:none;color:var(--text-secondary);cursor:pointer;border-radius:6px;transition:all .2s}.sidebar-nav button:hover{background-color:var(--bg-color);color:var(--text-color)}.sidebar-nav button.active{background-color:var(--primary-color-alpha);color:var(--primary-color)}.logout-btn{margin-top:auto;background-color:transparent;border:1px solid var(--border-color);color:var(--text-color)}.logout-btn:hover{border-color:var(--error-color);color:var(--error-color)}.main-content{flex:1;padding:2rem;overflow-y:auto}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.welcome-text h2{margin:0;font-size:1.8rem}.license-info{color:var(--text-secondary);font-size:.9rem;margin-top:.5rem}.card{background-color:var(--surface-color);border-radius:12px;padding:1.5rem;margin-bottom:1.5rem;border:1px solid var(--border-color);box-shadow:0 4px 6px #0000001a}.card h3{margin-top:0;margin-bottom:1rem;font-size:1.2rem}.user-list{list-style:none;padding:0;margin:0}.user-item{display:flex;justify-content:space-between;padding:.75rem 0;border-bottom:1px solid var(--border-color)}.user-item:last-child{border-bottom:none}.form-group{margin-bottom:1rem}.form-group input,.form-group select{width:100%;padding:.75rem;background-color:var(--bg-color);border:1px solid var(--border-color);border-radius:6px;color:var(--text-color);font-size:1rem}.form-group input:focus{border-color:var(--primary-color);outline:none}.checkbox-group{display:flex;align-items:center;gap:.5rem;margin-bottom:1rem}.btn-primary{background-color:var(--primary-color);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:6px;font-weight:600;cursor:pointer;transition:background-color .2s}.btn-primary:hover{background-color:var(--primary-hover)}.success-msg{color:var(--success-color);margin-top:1rem}.error-msg{color:var(--error-color);margin-top:1rem}.appointment-container{display:flex;gap:2rem;height:100%;position:relative}.calendar-section{flex:1;background:var(--surface-color);border-radius:12px;padding:1.5rem;border:1px solid var(--border-color);display:flex;flex-direction:column}.calendar-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.calendar-header h3{margin:0;font-size:1.5rem;text-transform:capitalize}.calendar-header button{background:transparent;border:1px solid var(--border-color);color:var(--text-color);width:36px;height:36px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.2rem}.calendar-header button:hover{background:var(--bg-color)}.calendar-grid-header{display:grid;grid-template-columns:repeat(7,1fr);text-align:center;font-weight:600;color:var(--text-secondary);margin-bottom:.5rem}.calendar-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:.5rem;flex:1}.calendar-day{background:var(--bg-color);border-radius:8px;padding:.5rem;min-height:80px;cursor:pointer;border:1px solid transparent;transition:all .2s;display:flex;flex-direction:column;justify-content:space-between}.calendar-day:hover{border-color:var(--primary-color);background:var(--surface-color)}.calendar-day.empty{background:transparent;cursor:default}.calendar-day.today{border-color:var(--primary-color);background:#3b82f61a}.calendar-day.selected{background:var(--primary-color);color:#fff}.day-number{font-weight:700;font-size:1.1rem}.day-badge{font-size:.75rem;background:var(--primary-color);color:#fff;padding:2px 6px;border-radius:4px;align-self:flex-start}.calendar-day.selected .day-badge{background:#fff;color:var(--primary-color)}.day-view-overlay{position:fixed;top:0;right:0;bottom:0;width:400px;background:var(--surface-color);box-shadow:-5px 0 25px #0000004d;z-index:100;padding:2rem;display:flex;flex-direction:column;border-left:1px solid var(--border-color);animation:slideIn .3s ease-out}@keyframes slideIn{0%{transform:translate(100%)}to{transform:translate(0)}}.day-view-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;padding-bottom:1rem;border-bottom:1px solid var(--border-color)}.day-view-header h4{margin:0;font-size:1.4rem;text-transform:capitalize}.day-view-header button{background:transparent;border:none;color:var(--text-secondary);font-size:1.5rem;cursor:pointer}.slots-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:.5rem}.time-slot{display:flex;gap:1rem;padding:.75rem;border-radius:8px;background:var(--bg-color);border:1px solid var(--border-color);align-items:center;transition:all .2s}.time-slot.free .slot-content{color:var(--text-secondary);cursor:pointer}.time-slot.free:hover{border-color:var(--primary-color)}.time-slot.occupied{background:#3b82f61a;border-color:var(--primary-color)}.time-label{font-weight:700;font-family:monospace;font-size:1rem;color:var(--text-secondary);width:50px}.slot-content{flex:1}.client-name{font-weight:600;color:var(--text-color)}.client-note{font-size:.85rem;color:var(--text-secondary)}.placeholder{font-size:.9rem;font-style:italic}.btn-delete{background:transparent;border:none;cursor:pointer;opacity:.5;font-size:1.1rem}.btn-delete:hover{opacity:1;color:var(--error-color)}.time-slot.editing{flex-direction:column;align-items:stretch;background:var(--surface-color);border:2px solid var(--primary-color)}.slot-form{display:flex;flex-direction:column;gap:.5rem;margin-top:.5rem}.slot-form input{padding:.5rem;border-radius:4px;border:1px solid var(--border-color);background:var(--bg-color);color:var(--text-color)}.slot-actions{display:flex;gap:.5rem;margin-top:.5rem}.btn-save{flex:1;padding:.4rem;background:var(--primary-color);color:#fff;border:none;border-radius:4px;cursor:pointer}.btn-cancel{flex:1;padding:.4rem;background:transparent;border:1px solid var(--border-color);color:var(--text-color);border-radius:4px;cursor:pointer}