.tab-navigation{position:fixed;bottom:0;left:0;right:0;display:flex;background:linear-gradient(180deg,var(--color-white) 0%,rgba(255,255,255,.98) 100%);border-top:1px solid var(--color-gray-light);box-shadow:0 -4px 12px #0ea6f01a;z-index:1000;padding:var(--spacing-sm) 0;padding-bottom:env(safe-area-inset-bottom,var(--spacing-sm));-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);width:100%;height:72px;box-sizing:border-box}.tab-button{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-xs);padding:var(--spacing-sm);background:none;border:none;cursor:pointer;transition:all .2s ease;color:var(--color-text-secondary)}.tab-button:active{transform:scale(.95)}.tab-button.active{color:var(--color-primary);position:relative}.tab-button.active:before{content:"";position:absolute;top:0;left:50%;transform:translate(-50%);width:40px;height:3px;background:var(--color-accent-bg);border-radius:0 0 3px 3px}.tab-icon{width:24px;height:24px;filter:brightness(0) saturate(100%) invert(45%) sepia(8%) saturate(750%) hue-rotate(182deg) brightness(95%) contrast(88%);transition:filter .2s ease}.tab-button.active .tab-icon{filter:brightness(0) saturate(100%) invert(60%) sepia(95%) saturate(7491%) hue-rotate(195deg) brightness(96%) contrast(101%)}.tab-label{font-size:12px;font-weight:500}.tab-button.active .tab-label{font-weight:600}.balance-tab{display:flex;flex-direction:column;gap:calc(var(--spacing-lg) / 2)}.balance-page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:calc(var(--spacing-lg) / 4);padding-bottom:var(--spacing-md);border-bottom:2px solid var(--color-gray-light)}.balance-page-header h2{font-size:24px;font-weight:700;color:var(--color-text-primary);letter-spacing:-.5px;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.balance-container{background:#9ed7f3;border-radius:var(--radius-xl);padding:var(--spacing-lg);margin:0 calc(var(--spacing-sm) * .5);box-shadow:0 4px 16px #9ed7f34d}.subjects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:var(--spacing-lg);width:100%;align-items:start}.subject-card-wrapper{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-sm);height:100%}.subject-card-name{font-size:14px;font-weight:600;color:#2165ac;text-transform:uppercase;text-align:center;margin-bottom:var(--spacing-xs);min-height:2.5em;display:flex;align-items:center;justify-content:center;width:100%;line-height:1.25}.subject-card{width:100%;aspect-ratio:1;border-radius:var(--radius-lg);padding:var(--spacing-md);display:flex;flex-direction:column;justify-content:center;align-items:center;box-shadow:0 4px 12px #0000001a;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.subject-card:hover{transform:translateY(-4px);box-shadow:0 6px 20px #00000026}.subject-card-blue{background:#3ab5ff;border:2px solid #3ab5ff}.subject-card-red{background:#fe3132;border:2px solid #fe3132}.subject-card-yellow{background:#ff934d;border:2px solid #ff934d}.subject-card-content{display:flex;flex-direction:column;gap:var(--spacing-md);width:100%;text-align:center}.subject-card-balance,.subject-card-lessons{display:flex;flex-direction:column;gap:var(--spacing-xs)}.subject-card-label{font-size:11px;font-weight:500;color:#ffffffe6;text-transform:uppercase;letter-spacing:.5px}.subject-card-value{font-size:16px;font-weight:700;color:#fff;line-height:1.2}.subject-card-value.warning,.subject-card-value.critical{color:#fff}.balance-empty{text-align:center;padding:var(--spacing-xl);color:var(--color-text-secondary)}.balance-empty p{font-size:16px}@media (max-width: 1024px) and (min-width: 481px){.subjects-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:var(--spacing-md)}.balance-container{padding:var(--spacing-md)}}@media (max-width: 480px){.subjects-grid{grid-template-columns:repeat(2,1fr);gap:var(--spacing-md)}.balance-container{padding:var(--spacing-md);margin:0 calc(var(--spacing-xs) * .5)}.subject-card{padding:var(--spacing-sm)}.subject-card-value{font-size:14px}.subject-card-label{font-size:10px}}@media (max-width: 800px) and (min-width: 481px){.subjects-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:var(--spacing-sm)}.subject-card-value{font-size:14px}.subject-card-label{font-size:10px}}.payments-tab{display:flex;flex-direction:column;gap:calc(var(--spacing-lg) / 2)}.payments-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:calc(var(--spacing-lg) / 4);padding-bottom:var(--spacing-md);border-bottom:2px solid var(--color-gray-light)}.payments-header h2{font-size:24px;font-weight:700;color:var(--color-text-primary);letter-spacing:-.5px;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.payments-count{font-size:13px;font-weight:600;color:var(--color-white);background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);padding:var(--spacing-xs) var(--spacing-md);border-radius:var(--radius-lg);box-shadow:0 2px 8px #0ea6f033}.payments-list{display:flex;flex-direction:column;gap:var(--spacing-sm)}.payment-item{background-color:var(--color-section-bg);border-radius:var(--radius-xl);padding:var(--spacing-lg);box-shadow:var(--shadow-sm);border:1px solid rgba(0,0,0,.05)}.payment-main{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--spacing-sm);gap:var(--spacing-md)}.payment-info{display:flex;flex-direction:column;gap:var(--spacing-xs);flex:1}.payment-date{font-size:15px;font-weight:600;color:var(--color-text-primary);line-height:1.4}.payment-type{font-size:13px;font-weight:500;color:var(--color-primary-dark);background:linear-gradient(135deg,#0ea6f01a,#3949ab1a);padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-sm);display:inline-block;width:fit-content}.payment-denomination{font-size:12px;color:var(--color-text-secondary);font-weight:500}.payment-amount{font-size:20px;font-weight:700;color:var(--color-primary-dark);white-space:nowrap;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 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rgba(0,0,0,.05)}.block-date{display:flex;align-items:center;gap:var(--spacing-xs);white-space:nowrap}.block-date-label{font-weight:600;color:var(--color-text-primary)}.block-date-value{white-space:nowrap}.block-date-separator{color:var(--color-text-secondary);opacity:.5;margin:0 var(--spacing-xs)}.payment-meta{display:flex;flex-wrap:wrap;gap:var(--spacing-sm);margin-top:var(--spacing-xs);font-size:12px;color:var(--color-text-secondary)}.payment-total,.payment-lessons{padding:var(--spacing-xs) var(--spacing-sm);background-color:var(--color-section-bg);border-radius:var(--radius-sm);font-weight:500}.filter-dropdown{width:100%;padding:var(--spacing-sm) var(--spacing-md);border:2px solid var(--color-gray-light);border-radius:var(--radius-md);font-size:14px;font-weight:600;color:var(--color-text-primary);background-color:var(--color-white);cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right var(--spacing-sm) center;background-size:12px;padding-right:calc(var(--spacing-md) + 20px);box-shadow:0 1px 3px #0000000d}.lessons-tab{display:flex;flex-direction:column;gap:calc(var(--spacing-lg) / 2)}.lessons-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:calc(var(--spacing-lg) / 4);padding-bottom:var(--spacing-md);border-bottom:2px solid var(--color-gray-light)}.lessons-header h2{font-size:24px;font-weight:700;color:var(--color-text-primary);letter-spacing:-.5px;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 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