:root{--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-success: #16a34a;--color-success-light: #f0fdf4;--color-error: #dc2626;--color-text: #111827;--color-text-secondary: #6b7280;--color-text-muted: #9ca3af;--color-border: #e5e7eb;--color-background: #f9fafb;--color-surface: #ffffff;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow-card: 0 1px 3px rgba(0, 0, 0, .08);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .1);--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 12px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:15px;line-height:1.5;color:var(--color-text);background:var(--color-background);-webkit-font-smoothing:antialiased}.order-page{min-height:100vh;background:var(--color-background)}.order-header{background:var(--color-surface);border-bottom:1px solid var(--color-border);padding:var(--space-5) var(--space-6)}.order-header h1{font-size:22px;font-weight:600;color:var(--color-text);margin:0}.order-header p{color:var(--color-text-secondary);margin:var(--space-1) 0 0 0;font-size:14px}.order-layout{display:grid;grid-template-columns:1fr 360px;gap:var(--space-6);max-width:1280px;margin:0 auto;padding:var(--space-6)}@media(max-width:960px){.order-layout{grid-template-columns:1fr}.cart-section{order:-1}}.catalog-section{min-width:0}.subject-section{margin-bottom:var(--space-6)}.subject-header{display:flex;align-items:center;justify-content:space-between;width:100%;padding:var(--space-3) 0;background:transparent;border:none;border-bottom:1px solid var(--color-border);cursor:pointer;margin-bottom:var(--space-4)}.subject-header:hover .subject-title{color:var(--color-primary)}.subject-title{font-size:14px;font-weight:600;color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.5px;margin:0;transition:color .15s ease}.subject-chevron{color:var(--color-text-muted);transition:transform .2s ease}.subject-chevron.expanded{transform:rotate(180deg)}.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:var(--space-4)}.product-card{background:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);padding:var(--space-6);display:flex;flex-direction:column;gap:var(--space-4);transition:box-shadow .15s ease}.product-card:hover{box-shadow:var(--shadow-lg)}.product-card--in-cart{background:var(--color-success-light)}.product-card-name{font-size:17px;font-weight:600;color:var(--color-text);margin:0;line-height:1.3}.product-card-tier-label{font-size:14px;font-weight:500;color:var(--color-text-secondary)}.product-card-tier-row{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap}.tier-recommended{font-size:13px;font-weight:500;color:var(--color-primary)}.product-card-tiers{display:flex;gap:var(--space-2)}.tier-pill{padding:var(--space-2) var(--space-4);border-radius:20px;font-size:13px;font-weight:500;cursor:pointer;transition:all .15s ease;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text-secondary)}.tier-pill:hover{border-color:var(--color-text-muted)}.tier-pill.active{background:var(--color-primary);border-color:var(--color-primary);color:#fff}.tier-pill .star{margin-left:var(--space-1)}.product-card-quantity{display:flex;flex-direction:column;gap:var(--space-2)}.quantity-label{font-size:14px;font-weight:500;color:var(--color-text-secondary)}.quantity-stepper{display:inline-flex;align-items:center;background:var(--color-background);border-radius:var(--radius-md);overflow:hidden;align-self:flex-start}.stepper-btn{width:44px;height:44px;border:none;background:transparent;cursor:pointer;font-size:20px;font-weight:500;color:var(--color-text);transition:background .15s ease}.stepper-btn:hover:not(:disabled){background:var(--color-border)}.stepper-btn:disabled{color:var(--color-text-muted);cursor:not-allowed}.stepper-value{min-width:44px;text-align:center;font-size:18px;font-weight:600;color:var(--color-text)}.product-card-price{font-size:20px;font-weight:600;color:var(--color-text)}.price-period{font-size:15px;font-weight:400;color:var(--color-text-secondary)}.product-card-pricing{display:flex;flex-direction:column;gap:var(--space-1)}.price-total{font-size:20px;font-weight:600;color:var(--color-text)}.price-breakdown{font-size:12px;line-height:1.6;color:#b0b5bd}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-5);border-radius:var(--radius-md);font-size:14px;font-weight:500;cursor:pointer;transition:all .15s 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p{margin:0;color:var(--color-text-secondary)}.cart-empty-hint{font-size:13px;margin-top:var(--space-2)!important;color:var(--color-text-muted)}.cart-items{max-height:320px;overflow-y:auto;position:relative}.cart-items:after{content:"";position:sticky;bottom:0;left:0;right:0;height:24px;background:linear-gradient(to top,var(--color-surface),transparent);pointer-events:none;display:block}.cart-items::-webkit-scrollbar{width:6px}.cart-items::-webkit-scrollbar-track{background:var(--color-background);border-radius:3px}.cart-items::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:3px}.cart-items::-webkit-scrollbar-thumb:hover{background:var(--color-text-muted)}.cart-item{padding:var(--space-4) var(--space-5)}.cart-item+.cart-item{border-top:1px solid 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center}.cart-item-remove{background:none;border:none;color:var(--color-text-muted);font-size:13px;cursor:pointer;padding:0;transition:color .15s ease}.cart-item-remove:hover{color:var(--color-error)}.cart-totals{padding:var(--space-5);border-top:1px solid var(--color-border);background:var(--color-background)}.cart-total-row{display:flex;justify-content:space-between;font-size:14px;padding:var(--space-1) 0;color:var(--color-text-secondary)}.cart-total-row span:last-child{font-variant-numeric:tabular-nums}.cart-total-final{font-size:18px;font-weight:600;color:var(--color-text);padding-top:var(--space-3);margin-top:var(--space-2);border-top:1px solid var(--color-border)}.cart-total-final span:last-child{font-size:20px}.cart-actions{padding:var(--space-5);display:flex;flex-direction:column;gap:var(--space-2)}.btn-secondary{background:var(--color-surface);color:var(--color-text-secondary);border:1px solid 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ease,box-shadow .15s ease}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1a}.form-group input::placeholder,.form-group textarea::placeholder{color:var(--color-text-muted)}.form-group textarea{resize:vertical;min-height:80px}.form-hint{font-size:13px;color:var(--color-text-secondary);margin-top:var(--space-2)}.form-group.has-error input,.form-group.has-error textarea,.form-group.has-error select,.has-error .form-group input{border-color:var(--color-error)}.form-group.has-error input:focus,.form-group.has-error textarea:focus,.has-error .form-group input:focus{border-color:var(--color-error);box-shadow:0 0 0 3px #dc26261a}.field-error{display:block;font-size:13px;color:var(--color-error);margin-top:var(--space-1)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-4)}@media(max-width:600px){.form-row{grid-template-columns:1fr}}.payment-options{display:flex;flex-direction:column;gap:var(--space-3)}.payment-option{display:flex;align-items:flex-start;gap:var(--space-3);padding:var(--space-4);border:1px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:border-color .15s ease,background .15s ease}.payment-option:hover{border-color:var(--color-text-muted)}.payment-option.selected{border-color:var(--color-primary);background:#2563eb0a}.payment-option 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ease}.school-dropdown-item:hover{background:var(--color-background)}.school-dropdown-item+.school-dropdown-item{border-top:1px solid var(--color-border)}.school-dropdown-name{font-size:14px;font-weight:500;color:var(--color-text)}.school-dropdown-location{font-size:13px;color:var(--color-text-secondary)}.school-dropdown-manual{width:100%;padding:var(--space-3) var(--space-4);border:none;border-top:1px solid var(--color-border);background:var(--color-background);color:var(--color-primary);font-size:14px;font-weight:500;text-align:left;cursor:pointer;transition:background .15s ease}.school-dropdown-manual:hover{background:var(--color-border)}.school-dropdown-empty{padding:var(--space-4);text-align:center;color:var(--color-text-secondary);font-size:14px}.school-dropdown-empty p{margin:0 0 var(--space-2) 0}.school-selected{display:flex;justify-content:space-between;align-items:center;padding:var(--space-4);background:var(--color-success-light);border:1px solid #bbf7d0;border-radius:var(--radius-md)}.school-selected-info{display:flex;flex-direction:column;gap:2px}.school-selected-name{font-size:14px;font-weight:500;color:var(--color-text)}.school-selected-location{font-size:13px;color:var(--color-text-secondary)}.school-clear-btn{padding:var(--space-2) var(--space-3);border:none;background:transparent;color:var(--color-primary);font-size:14px;font-weight:500;cursor:pointer}.school-clear-btn:hover{text-decoration:underline}.link-btn{background:none;border:none;color:var(--color-primary);font-size:inherit;cursor:pointer;padding:0}.link-btn:hover{text-decoration:underline}.checkout-summary-section{position:sticky;top:var(--space-6);height:fit-content}.checkout-summary{background:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);overflow:hidden}.checkout-summary-title{font-size:16px;font-weight:600;color:var(--color-text);margin:0;padding:var(--space-5);border-bottom:1px solid var(--color-border)}.checkout-summary-items{padding:var(--space-4) var(--space-5)}.checkout-summary-item{padding:var(--space-2) 0}.checkout-summary-item+.checkout-summary-item{border-top:1px solid var(--color-border)}.checkout-summary-item-name{font-size:14px;font-weight:500;color:var(--color-text)}.checkout-summary-item-variant{font-weight:400;color:var(--color-text-secondary)}.checkout-summary-item-detail{font-size:13px;color:var(--color-text-secondary)}.checkout-summary-totals{padding:var(--space-4) var(--space-5);background:var(--color-background);border-top:1px solid var(--color-border)}.checkout-summary-row{display:flex;justify-content:space-between;font-size:14px;padding:var(--space-1) 0;color:var(--color-text-secondary)}.checkout-summary-row span:last-child{font-variant-numeric:tabular-nums}.checkout-summary-total{font-size:16px;font-weight:600;color:var(--color-text);padding-top:var(--space-3);margin-top:var(--space-2);border-top:1px solid var(--color-border)}.checkout-summary-total span:last-child{font-size:18px}.checkout-summary .btn{margin:var(--space-4) var(--space-5) var(--space-5);width:calc(100% - var(--space-5) * 2)}.btn-lg{padding:var(--space-4) var(--space-6);font-size:16px}.confirmation-page{text-align:center;max-width:520px;margin:0 auto}.confirmation-loading{text-align:center;padding:var(--space-8);color:var(--color-text-secondary)}.confirmation-icon{font-size:48px;margin-bottom:var(--space-4)}.confirmation-title{font-size:24px;font-weight:600;color:var(--color-text);margin:0 0 var(--space-3) 0}.confirmation-message{font-size:15px;color:var(--color-text-secondary);margin:0 0 var(--space-6) 0;line-height:1.6}.confirmation-divider{height:1px;background:var(--color-border);margin:var(--space-6) 0}.confirmation-details{display:flex;flex-direction:column;gap:var(--space-3);margin-bottom:var(--space-6)}.confirmation-reference{display:flex;justify-content:space-between;font-size:14px}.confirmation-label{color:var(--color-text-secondary)}.confirmation-value{font-weight:500;color:var(--color-text)}.confirmation-order-summary{background:var(--color-background);border-radius:var(--radius-md);padding:var(--space-5);margin-bottom:var(--space-6);text-align:left}.confirmation-item{padding:var(--space-2) 0}.confirmation-item+.confirmation-item{border-top:1px solid var(--color-border)}.confirmation-item-name{display:block;font-size:14px;font-weight:500;color:var(--color-text)}.confirmation-item-detail{font-size:13px;color:var(--color-text-secondary)}.confirmation-totals{margin-top:var(--space-4);padding-top:var(--space-4);border-top:1px solid var(--color-border)}.confirmation-total-row{display:flex;justify-content:space-between;font-size:14px;padding:var(--space-1) 0;color:var(--color-text-secondary)}.confirmation-total-row span:last-child{font-variant-numeric:tabular-nums}.confirmation-total-final{font-size:16px;font-weight:600;color:var(--color-text);padding-top:var(--space-3);margin-top:var(--space-2);border-top:1px solid var(--color-border)}.confirmation-contact{margin-bottom:var(--space-6)}.confirmation-contact p{font-size:14px;color:var(--color-text-secondary);margin:0;line-height:1.8}.confirmation-contact a{color:var(--color-primary);text-decoration:none}.confirmation-contact a:hover{text-decoration:underline}