:root{--background: #ebe7e7;--foreground: #111827;--surface: #ffffff;--surface-muted: #f3f4f6;--surface-soft: #f9fafb;--text-primary: #111827;--text-secondary: #4b5563;--text-inverse: #ffffff;--border-subtle: #e5e7eb;--border-strong: #d1d5db;--border-dark: #374151;--primary: #2563eb;--primary-strong: #1d4ed8;--primary-soft: #e0e7ff;--danger: #ef4444;--danger-strong: #dc2626;--danger-soft: #fef2f2;--success: #16a34a;--warning: #fbbf24;--overlay: rgba(17, 24, 39, .55);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--shadow-soft: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--shadow-card: 0 10px 20px rgba(0, 0, 0, .06);--font-sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px}.u-modal-backdrop{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;padding:var(--space-4);background:var(--overlay);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:50}.u-modal-panel{width:min(100%,720px);max-height:90vh;background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft);display:flex;flex-direction:column;overflow:hidden}.u-modal-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-4) var(--space-5);border-bottom:1px solid var(--border-subtle);background:var(--surface-soft)}.u-modal-body{padding:var(--space-5);overflow-y:auto}.u-form{display:flex;flex-direction:column;gap:var(--space-4)}.u-grid-2{display:grid;grid-template-columns:1fr;gap:var(--space-4)}@media(min-width:768px){.u-grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}}.u-field-label{display:block;margin-bottom:var(--space-1);color:var(--text-primary);font-weight:600;font-size:.95rem}.u-field-input,.u-field-select,.u-field-textarea{width:100%;padding:.75rem 1rem;border:1px solid var(--border-strong);border-radius:var(--radius-md);background:#fff;color:var(--text-primary);transition:border-color .15s ease,box-shadow .15s ease,background-color .15s ease}.u-field-input:focus,.u-field-select:focus,.u-field-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-soft)}.u-field-input:disabled,.u-field-select:disabled,.u-field-textarea:disabled{background:var(--surface-muted);cursor:not-allowed}.u-alert{border-radius:var(--radius-md);padding:var(--space-3) var(--space-4);font-size:.95rem}.u-alert-danger{background:var(--danger-soft);border:1px solid #fecdd3;color:var(--danger-strong)}.u-btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid transparent;border-radius:var(--radius-md);padding:.65rem 1rem;font-weight:600;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,background-color .15s ease,border-color .15s ease,color .15s ease;display:inline-flex;align-items:center;justify-content:center;gap:.5rem}.u-btn:hover:not(:disabled){transform:translateY(-1px)}.u-btn:active:not(:disabled){transform:translateY(0)}.u-btn:disabled{opacity:.6;cursor:not-allowed}.u-btn-primary{background:var(--primary);border-color:var(--primary);color:var(--text-inverse)}.u-btn-primary:hover:not(:disabled){background:var(--primary-strong)}.u-btn-ghost{background:#fff;border-color:var(--border-strong);color:var(--text-secondary)}.u-btn-ghost:hover:not(:disabled){background:var(--surface-muted);color:var(--text-primary)}.u-btn-dark{background:#111827;border-color:#111827;color:var(--text-inverse)}.u-btn-dark:hover:not(:disabled){background:#0b1220}.u-btn-danger{background:var(--danger);border-color:var(--danger);color:var(--text-inverse)}.u-stack{display:flex;gap:var(--space-3)}.u-stack--end{justify-content:flex-end}.u-tag{display:inline-flex;align-items:center;gap:.3rem;padding:.25rem .6rem;border-radius:999px;font-size:.85rem;font-weight:600}.u-tag-success{background:#dcfce7;color:#15803d}.u-tag-muted{background:#e5e7eb;color:#4b5563}.u-text-center{text-align:center}.u-surface-card{background:var(--surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--shadow-card)}.u-icon-sm{width:16px;height:16px}@keyframes u-spin{to{transform:rotate(360deg)}}.u-icon-spin{animation:u-spin 1s linear infinite}:root{--background: #ebe7e7}*,*:before,*:after{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background-color:var(--background);color:var(--foreground);font-family:var(--font-sans);-webkit-font-smoothing:antialiased}.responsive-block{max-width:100%;overflow-wrap:anywhere}.sidebar-toggle{position:fixed;left:.25rem;top:1rem;z-index:50;padding:.45rem;color:#fff;border-radius:.5rem;box-shadow:none;transition:all .2s;background-color:transparent;border:none;cursor:pointer}.sidebar-toggle:hover{background-color:#3741514d}.sidebar-overlay{position:fixed;inset:0;background-color:#00000080;z-index:40}.sidebar{position:fixed;top:4rem;left:0;height:100vh;width:16rem;background-color:#000;color:#fff;z-index:50;transform:translate(0);transition:transform .3s ease-in-out;display:flex;flex-direction:column}.sidebar.closed{transform:translate(-100%)}.sidebar-header{padding:.5rem;border-bottom:1px solid #374151}.sidebar-role{font-size:.875rem;color:#9ca3af}.sidebar-nav{margin-top:1.5rem;flex:1;overflow-y:auto}.sidebar-menu{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.5rem;padding:0 1rem}.sidebar-menu li{margin:0}.sidebar-item{width:100%;display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;border-radius:.5rem;text-align:left;transition:all .2s;background:transparent;border:none;color:#9ca3af;cursor:pointer;font-size:1rem}.sidebar-item:hover,.sidebar-item.active{background-color:#1f2937;color:#fff}.sidebar-item-icon{width:1.25rem;height:1.25rem;flex-shrink:0;transition:color .2s}.sidebar-item:hover .sidebar-item-icon,.sidebar-item.active .sidebar-item-icon{color:#fff}.sidebar-footer{padding:1rem;border-top:1px solid #374151;text-align:center;color:#6b7280;font-size:.75rem}.sidebar-spacer{width:16rem;flex-shrink:0}@media(max-width:768px){.sidebar{top:4rem;height:calc(100vh - 4rem)}.sidebar-spacer{display:none}.sidebar-toggle{top:.75rem}}.sidebar-nav::-webkit-scrollbar{width:.5rem}.sidebar-nav::-webkit-scrollbar-track{background:transparent}.sidebar-nav::-webkit-scrollbar-thumb{background:#374151;border-radius:.25rem}.sidebar-nav::-webkit-scrollbar-thumb:hover{background:#4b5563}.cart-overlay{position:fixed;inset:0;background:#0000008c;z-index:1000;animation:fadeIn .3s ease forwards}.cart-sidebar{position:fixed;top:0;right:0;width:380px;height:100vh;background:#fff;box-shadow:-4px 0 25px #0003;z-index:1001;display:flex;flex-direction:column;transform:translate(100%);animation:slideIn .35s forwards;border-radius:0}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.cart-header{display:flex;justify-content:space-between;align-items:center;background:#111;color:#fff;padding:1rem 1.2rem;border-radius:0}.cart-title{display:flex;align-items:center;gap:10px}.cart-icon{color:#61dafb}.close-btn{background:transparent;border:none;color:#fff;cursor:pointer;transition:transform .2s ease}.close-btn:hover{transform:rotate(90deg)}.cart-items{flex:1;overflow-y:auto;padding:1rem;background:#f4f5f7}.cart-item{display:flex;justify-content:space-between;align-items:center;background:#fff;border:1px solid #e5e7eb;border-radius:0;padding:.8rem 1rem;margin-bottom:.75rem;transition:box-shadow .2s ease}.cart-item:hover{box-shadow:0 3px 10px #0000001a}.item-info strong{color:#000;display:block}.item-category{font-size:.85rem;color:#6b7280}.remove-btn-solo{background:transparent;border:none;color:#dc2626;cursor:pointer;padding:4px;border-radius:0;transition:background .2s ease}.remove-btn-solo:hover{background:#fee2e2}.item-quantity-badge{display:inline-flex;align-items:center;justify-content:center;background:#03c;color:#fff;font-size:.75rem;font-weight:700;padding:.25rem .5rem;border-radius:0;min-width:24px}.empty-state{display:flex;flex-direction:column;justify-content:center;align-items:center;height:100%;text-align:center;color:#9ca3af}.empty-state svg{opacity:.5;margin-bottom:1rem;width:80px;height:80px}.cart-footer{border-top:1px solid #e5e7eb;padding:1rem 1.2rem;background:#f9fafb;border-radius:0}.professor-section{margin-bottom:1rem}.professor-section label{display:flex;align-items:center;gap:6px;font-weight:500;color:#111827;margin-bottom:.4rem}.professor-section select{width:100%;padding:.5rem;border:1px solid #d1d5db;border-radius:0;font-size:.95rem;color:#111827;background:#fff}.professor-section select option{color:#111827}.loading-select{font-size:.9rem;color:#6b7280}.motivo-section{margin-bottom:1rem}.motivo-section label{display:block;font-weight:500;color:#000;margin-bottom:.4rem}.motivo-section textarea{width:100%;resize:none;border:1px solid #d1d5db;border-radius:0;padding:.6rem;font-size:.95rem;background:#fff;transition:border-color .2s ease}.motivo-section textarea:focus{border-color:#03c;outline:none}.total{font-weight:600;color:#111827;margin-bottom:.75rem}.footer-buttons{display:flex;justify-content:space-between;gap:10px}.clear-btn,.submit-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;border:none;padding:.6rem 1rem;font-weight:500;border-radius:0;cursor:pointer;transition:background .2s ease}.clear-btn{background:#e5e7eb;color:#000}.clear-btn:hover{background:#d1d5db}.submit-btn{background:#03c;color:#fff}.submit-btn:hover{background:#02a}.required{color:#dc2626;font-weight:700}.cart-items::-webkit-scrollbar{width:8px}.cart-items::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:0}.cart-items::-webkit-scrollbar-thumb:hover{background:#9ca3af}@media(max-width:480px){.cart-sidebar{width:100%;border-radius:0}}.navbar{position:fixed;top:0;left:0;width:100%;padding:1.25rem;display:flex;justify-content:space-between;align-items:center;background-color:#000;color:#fff;z-index:50;font-family:Arial,sans-serif;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.navbar-logo a{font-size:1.125rem;font-weight:700;color:#fff;text-decoration:none;padding-left:2rem}.navbar-menu{display:flex;align-items:center;gap:1.5rem;list-style:none;margin:0;padding:0}.user-name{font-weight:500;color:#fff;cursor:default;transition:color .2s,transform .2s}.user-name:hover{color:#9ca3af;transform:scale(1.05)}.cart-btn{position:relative;background:transparent;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:.5rem;border-radius:.375rem;transition:all .2s;color:#fff}.cart-btn:hover{background-color:#1f2937;transform:scale(1.05)}.cart-btn:active{transform:scale(.95)}.cart-badge{position:absolute;top:0;right:0;background-color:#ef4444;color:#fff;font-size:.7rem;font-weight:700;padding:2px 6px;border-radius:10px;min-width:18px;height:18px;display:flex;align-items:center;justify-content:center;line-height:1;box-shadow:0 2px 4px #0003}.logout-btn{background-color:transparent;border:1px solid #374151;color:#fff;padding:.5rem 1rem;border-radius:.375rem;cursor:pointer;font-weight:600;transition:all .2s}.logout-btn:hover{background-color:#1f2937;border-color:#1f2937;transform:scale(1.05)}@media(max-width:768px){.navbar{padding:1rem}.navbar-logo a{padding-left:1rem;font-size:1rem}.navbar-menu{gap:1rem}.logout-btn{padding:.4rem .8rem;font-size:.875rem}}.app-footer{position:fixed;bottom:0;left:0;right:0;width:100%;background:#000;color:#d1d5db;padding:8px 12px;display:flex;align-items:center;justify-content:center;z-index:50}.app-footer p{margin:0;line-height:1;font-size:.75rem;white-space:nowrap}.auth-screen{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;padding:var(--space-6) var(--space-4);background:var(--surface-muted)}.auth-card{width:min(480px,100%);background:var(--surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);padding:var(--space-6)}.auth-title{margin:0 0 var(--space-2) 0;text-align:center;font-size:1.75rem;font-weight:700;color:var(--text-primary)}.auth-subtitle{margin:0 0 var(--space-4) 0;text-align:center;color:var(--text-secondary)}.auth-alert{background:var(--danger);color:var(--text-inverse);border-radius:var(--radius-md);padding:var(--space-3);text-align:center;margin-bottom:var(--space-4)}.auth-form{display:flex;flex-direction:column;gap:var(--space-5)}.auth-label{display:block;margin-bottom:var(--space-2);color:var(--text-primary);font-weight:600}.auth-input{position:relative}.auth-input-field{width:100%;padding:.85rem 1rem;border:1px solid var(--border-strong);border-radius:var(--radius-md);background:#fff;color:var(--text-primary);transition:border-color .15s ease,box-shadow .15s ease}.auth-input-field:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-soft)}.auth-input-field.is-invalid{border-color:var(--danger-strong);box-shadow:0 0 0 1px var(--danger-soft)}.auth-error-text{margin-top:var(--space-1);color:var(--danger-strong);font-size:.9rem}.auth-input-toggle{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:transparent;border:none;color:var(--text-secondary);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:color .15s ease}.auth-input-toggle:hover{color:var(--text-primary)}.auth-submit{width:100%;padding:.9rem;justify-content:center;box-shadow:0 10px 15px -3px #0000001a}.auth-submit:disabled{opacity:.7}@media(max-width:480px){.auth-card{padding:var(--space-5)}}.loading-container{display:flex;align-items:center;justify-content:center;min-height:100vh;background-color:#f3f4f6}.loading-content{text-align:center}.loading-text{margin-top:16px;color:#4b5563}.access-denied{text-align:center;padding:40px 20px}.access-denied-title{font-size:24px;font-weight:700;margin-bottom:16px;color:#000}.access-denied-text{color:#000}.access-denied-role{font-size:14px;color:#4b5563;margin-top:16px}.home-page{text-align:center;padding:20px}.home-title{font-size:28px;font-weight:700;margin-bottom:16px;color:#000}.home-description{font-size:16px;margin-top:32px;color:#000;line-height:1.6}.home-instruction{font-size:18px;margin-top:40px;color:#000}.home-user-info{font-size:14px;color:#4b5563;margin-top:28px}.home-logo{height:auto;max-width:200px;margin:28px auto 0;display:block}.page-title{font-size:24px;font-weight:700;margin-bottom:16px;color:#000}.page-text{color:#000}.app-container{display:flex;flex-direction:column;min-height:100vh;margin-left:270px;padding:0 calc(4rem + 20px);transition:margin-left .3s ease,padding .3s ease}.app-container.sidebar-closed{margin-left:0;padding:0 15rem}.main-content{width:100%;max-width:1400px;padding:40px 40px 20px;margin:160px auto 35px;background-color:#fff;border-radius:8px;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a}.main-content,.main-content *{box-sizing:border-box}.main-content{overflow-x:auto}img,picture,video,iframe{max-width:100%;height:auto;display:block}.table-responsive{width:100%;overflow-x:auto}table{width:100%;border-collapse:collapse;table-layout:auto;max-width:100%}td,th{word-break:break-word}.footer-wrapper{position:relative;z-index:50;transition:margin-left .3s ease,opacity .3s ease;margin-left:270px}.footer-wrapper.sidebar-closed{margin-left:0}.footer-visible{opacity:1}.footer-hidden{opacity:0}@media(max-width:1400px){.main-content{max-width:90%;padding:40px}}@media(max-width:1024px){.app-container,.footer-wrapper{margin-left:200px}.main-content{width:85%;max-width:1200px;padding:35px;margin-top:140px;margin-bottom:40px}.home-title{font-size:24px}}@media(max-width:768px){.app-container,.footer-wrapper{margin-left:0}.main-content{width:calc(100% - 30px);max-width:none;padding:25px;margin:100px 15px 40px;border-radius:8px}.home-title,.page-title,.access-denied-title{font-size:22px}.home-description{font-size:15px;margin-top:24px}.home-instruction{font-size:16px;margin-top:32px}.home-logo{max-width:160px}}@media(max-width:480px){.main-content{padding:15px;margin:80px 10px 35px}.home-title,.page-title,.access-denied-title{font-size:20px}.home-description,.home-instruction{font-size:14px}.home-user-info{font-size:12px}.home-logo{max-width:140px;margin-top:20px}}a{font-weight:500;color:#fff;text-decoration:inherit}a:hover{color:#95f9e3}body{margin:0;min-width:320px;min-height:100vh;background-color:var(--background)}