:root{--primary: #2563EB;--primary-dark: #1D4ED8;--primary-light: #EFF6FF;--secondary: #10B981;--secondary-light: #ECFDF5;--warning: #F59E0B;--warning-light: #FFFBEB;--danger: #EF4444;--danger-light: #FEF2F2;--bg: #F3F4F6;--surface: #FFFFFF;--border: #E5E7EB;--text: #111827;--text-secondary: #6B7280;--text-muted: #6B7280;--shadow-sm: 0 1px 3px rgba(0,0,0,.08);--shadow: 0 2px 8px rgba(0,0,0,.1);--shadow-md: 0 4px 16px rgba(0,0,0,.12);--radius: 12px;--radius-sm: 8px;--radius-lg: 16px;--nav-height: 64px;--header-height: 56px}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg);color:var(--text);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}#root{height:100%;max-width:480px;margin:0 auto;background:var(--bg);position:relative}h1{font-size:1.5rem;font-weight:700}h2{font-size:1.25rem;font-weight:700}h3{font-size:1rem;font-weight:600}.app-shell{display:flex;flex-direction:column;height:100%}.page-header{position:sticky;top:0;z-index:100;background:var(--surface);border-bottom:1px solid var(--border);padding:0 16px;height:var(--header-height);display:flex;align-items:center;justify-content:space-between;box-shadow:var(--shadow-sm)}.page-header h1{font-size:1.125rem;font-weight:700}.page-content{flex:1;overflow-y:auto;padding:16px;padding-bottom:calc(var(--nav-height) + 16px)}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:480px;height:var(--nav-height);background:var(--surface);border-top:1px solid var(--border);display:flex;align-items:stretch;z-index:200;box-shadow:0 -2px 8px #0000000f}.nav-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;cursor:pointer;border:none;background:none;color:var(--text-muted);font-size:.65rem;font-weight:500;text-decoration:none;transition:color .15s;padding:8px 4px}.nav-item svg{width:22px;height:22px}.nav-item.active{color:var(--primary)}.nav-item.active .nav-icon-bg{background:var(--primary-light);border-radius:8px;padding:4px 12px}.card{background:var(--surface);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow-sm);border:1px solid var(--border);margin-bottom:12px}.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.card-title{font-size:.875rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;border-radius:var(--radius-sm);font-size:.9375rem;font-weight:600;cursor:pointer;border:none;transition:all .15s;white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-secondary{background:var(--border);color:var(--text)}.btn-secondary:hover:not(:disabled){background:#D1D5DB}.btn-success{background:var(--secondary);color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-sm{padding:6px 12px;font-size:.8125rem}.btn-lg{padding:14px 24px;font-size:1rem}.btn-block{width:100%}.btn-icon{padding:8px;border-radius:50%;background:transparent;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-secondary)}.btn-icon:hover{background:var(--bg)}.form-group{margin-bottom:16px}.form-label{display:block;font-size:.875rem;font-weight:600;color:var(--text);margin-bottom:6px}.form-control{width:100%;padding:10px 14px;border:1.5px solid var(--border);border-radius:var(--radius-sm);font-size:1rem;color:var(--text);background:var(--surface);transition:border-color .15s;outline:none}.form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1f}.form-control::placeholder{color:var(--text-muted)}select.form-control{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236B7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;background-size:16px;padding-right:36px}.form-error{font-size:.8125rem;color:var(--danger);margin-top:4px}.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:100px;font-size:.75rem;font-weight:600}.badge-primary{background:var(--primary-light);color:var(--primary)}.badge-success{background:var(--secondary-light);color:var(--secondary)}.badge-warning{background:var(--warning-light);color:#92400e}.badge-danger{background:var(--danger-light);color:var(--danger)}.badge-gray{background:var(--border);color:var(--text-secondary)}.toggle-group{display:flex;flex-wrap:wrap;gap:8px}.toggle-chip{padding:6px 14px;border-radius:100px;border:1.5px solid var(--border);background:var(--surface);font-size:.875rem;font-weight:500;cursor:pointer;transition:all .15s;color:var(--text-secondary)}.toggle-chip.active{background:var(--primary);border-color:var(--primary);color:#fff}.day-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}.day-cell{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 4px;border-radius:var(--radius-sm);border:1.5px solid var(--border);background:var(--surface);cursor:pointer;font-size:.75rem;transition:all .15s}.day-cell .day-label{font-weight:600;color:var(--text)}.day-cell .day-sub{color:var(--text-muted);font-size:.65rem}.day-cell.morning-active{border-color:var(--primary);background:var(--primary-light)}.day-cell.afternoon-active{border-color:var(--secondary);background:var(--secondary-light)}.day-cell.both-active{border-color:var(--warning);background:var(--warning-light)}.trip-card{background:var(--surface);border-radius:var(--radius);padding:14px;border-left:4px solid var(--primary);box-shadow:var(--shadow-sm);margin-bottom:10px}.trip-card.afternoon{border-left-color:var(--secondary)}.trip-card.unassigned{border-left-color:var(--danger)}.trip-time{font-size:1.25rem;font-weight:700;color:var(--primary)}.trip-card.afternoon .trip-time{color:var(--secondary)}.trip-card.unassigned .trip-time{color:var(--danger)}.trip-driver{font-size:.875rem;color:var(--text-secondary);margin:4px 0}.trip-students{display:flex;flex-wrap:wrap;gap:4px;margin-top:8px}.student-chip{background:var(--bg);border-radius:100px;padding:3px 10px;font-size:.8125rem;font-weight:500;color:var(--text)}.day-section{margin-bottom:20px}.day-heading{display:flex;align-items:center;gap:10px;margin-bottom:10px;padding:0 2px}.day-dot{width:8px;height:8px;border-radius:50%;background:var(--primary);flex-shrink:0}.day-name{font-size:1rem;font-weight:700;color:var(--text)}.day-date-label{font-size:.8125rem;color:var(--text-muted)}.alert{padding:12px 16px;border-radius:var(--radius-sm);font-size:.875rem;margin-bottom:12px;display:flex;align-items:flex-start;gap:8px}.alert-info{background:var(--primary-light);color:var(--primary)}.alert-success{background:var(--secondary-light);color:#065f46}.alert-warning{background:var(--warning-light);color:#92400e}.alert-danger{background:var(--danger-light);color:#991b1b}.auth-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;background:linear-gradient(135deg,#1D4ED8 0%,#2563EB 50%,#0EA5E9 100%)}.auth-logo{font-size:3rem;margin-bottom:8px}.auth-title{color:#fff;font-size:1.375rem;font-weight:800;text-align:center;margin-bottom:4px}.auth-subtitle{color:#fffc;font-size:.875rem;text-align:center;margin-bottom:28px}.auth-card{background:white;border-radius:var(--radius-lg);padding:24px;width:100%;max-width:400px;box-shadow:var(--shadow-md)}.auth-tabs{display:flex;background:var(--bg);border-radius:var(--radius-sm);padding:4px;margin-bottom:20px}.auth-tab{flex:1;padding:8px;text-align:center;border-radius:6px;font-size:.9375rem;font-weight:600;cursor:pointer;border:none;background:transparent;color:var(--text-secondary);transition:all .15s}.auth-tab.active{background:white;color:var(--primary);box-shadow:var(--shadow-sm)}.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}.stat-card{background:var(--surface);border-radius:var(--radius);padding:14px 10px;text-align:center;border:1px solid var(--border)}.stat-value{font-size:1.75rem;font-weight:800;color:var(--primary);line-height:1}.stat-label{font-size:.75rem;color:var(--text-secondary);margin-top:4px}.week-selector{display:flex;align-items:center;gap:8px;background:var(--surface);border-radius:var(--radius-sm);padding:8px 12px;margin-bottom:16px;border:1px solid var(--border)}.week-selector .week-label{flex:1;text-align:center;font-size:.9375rem;font-weight:600;color:var(--text)}.week-nav-btn{background:var(--bg);border:1px solid var(--border);border-radius:8px;width:32px;height:32px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1rem;color:var(--text-secondary)}.week-nav-btn:hover{background:var(--border)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.5);z-index:500;display:flex;align-items:flex-end;justify-content:center}.modal-sheet{background:var(--surface);border-radius:var(--radius-lg) var(--radius-lg) 0 0;padding:20px;width:100%;max-width:480px;max-height:85vh;overflow-y:auto;animation:slideUp .25s ease}@keyframes slideUp{0%{transform:translateY(100%);opacity:0}to{transform:translateY(0);opacity:1}}.modal-handle{width:40px;height:4px;background:var(--border);border-radius:100px;margin:0 auto 16px}.modal-title{font-size:1.125rem;font-weight:700;margin-bottom:16px}.list-item{display:flex;align-items:center;gap:12px;padding:12px;background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);margin-bottom:8px}.list-item-avatar{width:40px;height:40px;border-radius:50%;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.875rem;flex-shrink:0}.list-item-content{flex:1;min-width:0}.list-item-title{font-weight:600;font-size:.9375rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.list-item-subtitle{font-size:.8125rem;color:var(--text-secondary)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 24px;text-align:center}.empty-state-icon{font-size:3rem;margin-bottom:12px}.empty-state-title{font-size:1.125rem;font-weight:700;color:var(--text);margin-bottom:6px}.empty-state-text{font-size:.875rem;color:var(--text-secondary)}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.section-title{font-size:1rem;font-weight:700;color:var(--text)}.avail-grid{display:grid;grid-template-columns:80px 1fr 1fr;gap:6px;align-items:center}.avail-day-name{font-size:.875rem;font-weight:600}.avail-check{display:flex;align-items:center;gap:6px;font-size:.8125rem;color:var(--text-secondary);cursor:pointer;padding:8px;border-radius:var(--radius-sm);border:1.5px solid var(--border);transition:all .15s}.avail-check.checked{border-color:var(--primary);background:var(--primary-light);color:var(--primary)}.avail-check input{display:none}.spinner{width:24px;height:24px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.page-loading{display:flex;align-items:center;justify-content:center;height:200px}::-webkit-scrollbar{width:4px;height:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:100px}.divider{height:1px;background:var(--border);margin:16px 0}.text-center{text-align:center}.text-muted{color:var(--text-secondary)}.text-sm{font-size:.875rem}.mt-auto{margin-top:auto}.mb-0{margin-bottom:0}.mb-4{margin-bottom:16px}.mt-4{margin-top:16px}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-2{gap:8px}.gap-3{gap:12px}.w-full{width:100%}.sr-only,.skip-link{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media (min-width: 1024px){.skip-link{width:auto;height:auto;padding:10px 16px;margin:0;overflow:visible;clip:auto;white-space:normal;top:-40px;left:8px;background:var(--primary);color:#fff;border-radius:var(--radius-sm);font-weight:600;text-decoration:none;z-index:9999;transition:top .2s}.skip-link:focus{top:20px;outline:3px solid white;outline-offset:2px}}:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}.btn:focus-visible{outline:3px solid var(--primary);outline-offset:2px}.btn-primary:focus-visible,.btn-success:focus-visible,.btn-danger:focus-visible{outline-color:var(--text)}.nav-item:focus-visible{outline:2px solid var(--primary);outline-offset:-4px;border-radius:8px}.toggle-chip:focus-visible,.day-cell:focus-visible,.avail-check:focus-visible,.auth-tab:focus-visible,.week-nav-btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.trip-card-interactive{cursor:pointer;border:none;text-align:left;font:inherit;color:inherit;width:100%;display:block}.trip-card-interactive:focus-visible{outline:3px solid var(--primary);outline-offset:2px}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}.modal-sheet{animation:none!important}.spinner{animation:none!important;border-top-color:var(--primary)}}@media (forced-colors: active){.btn,.nav-item,.toggle-chip,.day-cell,.avail-check,.trip-card,.card,.list-item{border:1px solid CanvasText}.nav-item.active .nav-icon-bg{background:Highlight;color:HighlightText}}.btn-icon{min-width:44px;min-height:44px}.week-nav-btn{min-width:44px;min-height:44px;width:44px;height:44px}