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.loading-subtitle{font-size:var(--app-font-size-sm);color:var(--app-medium-gray)}.app-error{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--app-spacing-xxl);text-align:center}.app-error ion-icon{font-size:4rem;color:var(--app-danger);margin-bottom:var(--app-spacing-lg)}.app-error .error-title{font-size:var(--app-font-size-xl);font-weight:var(--app-font-weight-semibold);color:var(--app-dark-gray);margin-bottom:var(--app-spacing-sm)}.app-error .error-message{font-size:var(--app-font-size-md);color:var(--app-medium-gray);margin-bottom:var(--app-spacing-lg);line-height:1.5}.app-empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--app-spacing-xxl);text-align:center}.app-empty-state ion-icon{font-size:5rem;color:var(--app-medium-gray);margin-bottom:var(--app-spacing-lg);opacity:.5}.app-empty-state .empty-title{font-size:var(--app-font-size-xl);font-weight:var(--app-font-weight-semibold);color:var(--app-dark-gray);margin-bottom:var(--app-spacing-sm)}.app-empty-state .empty-message{font-size:var(--app-font-size-md);color:var(--app-medium-gray);margin-bottom:var(--app-spacing-lg);line-height:1.5}.app-spacing-xs{margin:var(--app-spacing-xs)}.app-spacing-sm{margin:var(--app-spacing-sm)}.app-spacing-md{margin:var(--app-spacing-md)}.app-spacing-lg{margin:var(--app-spacing-lg)}.app-spacing-xl{margin:var(--app-spacing-xl)}.app-padding-xs{padding:var(--app-spacing-xs)}.app-padding-sm{padding:var(--app-spacing-sm)}.app-padding-md{padding:var(--app-spacing-md)}.app-padding-lg{padding:var(--app-spacing-lg)}.app-padding-xl{padding:var(--app-spacing-xl)}.text-primary{color:var(--app-primary)}.text-secondary{color:var(--app-secondary)}.text-success{color:var(--app-success)}.text-warning{color:var(--app-warning)}.text-danger{color:var(--app-danger)}.text-medium{color:var(--app-medium-gray)}.text-dark{color:var(--app-dark-gray)}.bg-primary{background-color:var(--app-primary)}.bg-secondary{background-color:var(--app-secondary)}.bg-success{background-color:var(--app-success)}.bg-warning{background-color:var(--app-warning)}.bg-danger{background-color:var(--app-danger)}.bg-light{background-color:var(--app-light)}.rounded-xs{border-radius:var(--app-border-radius-xs)}.rounded-sm{border-radius:var(--app-border-radius-sm)}.rounded-md{border-radius:var(--app-border-radius-md)}.rounded-lg{border-radius:var(--app-border-radius-lg)}.rounded-xl{border-radius:var(--app-border-radius-xl)}.rounded-full{border-radius:var(--app-border-radius-full)}.shadow-xs{box-shadow:var(--app-shadow-xs)}.shadow-sm{box-shadow:var(--app-shadow-sm)}.shadow-md{box-shadow:var(--app-shadow-md)}.shadow-lg{box-shadow:var(--app-shadow-lg)}.shadow-xl{box-shadow:var(--app-shadow-xl)}.gradient-math{background:var(--gradient-math)}.gradient-french{background:var(--gradient-french)}.gradient-science{background:var(--gradient-science)}.gradient-history{background:var(--gradient-history)}.gradient-geography{background:var(--gradient-geography)}.gradient-english{background:var(--gradient-english)}.gradient-philosophy{background:var(--gradient-philosophy)}.gradient-physics{background:var(--gradient-physics)}.gradient-chemistry{background:var(--gradient-chemistry)}.gradient-biology{background:var(--gradient-biology)}.subject-card{position:relative;overflow:hidden}.subject-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-dynamic, var(--gradient-default))}.subject-card.math{--gradient-dynamic: var(--gradient-math)}.subject-card.french{--gradient-dynamic: var(--gradient-french)}.subject-card.science{--gradient-dynamic: var(--gradient-science)}.subject-card.history{--gradient-dynamic: var(--gradient-history)}.subject-card.geography{--gradient-dynamic: var(--gradient-geography)}.subject-card.english{--gradient-dynamic: var(--gradient-english)}.subject-card.philosophy{--gradient-dynamic: var(--gradient-philosophy)}.subject-card.physics{--gradient-dynamic: var(--gradient-physics)}.subject-card.chemistry{--gradient-dynamic: var(--gradient-chemistry)}.subject-card.biology{--gradient-dynamic: var(--gradient-biology)}@media(min-width:768px){.app-card{margin:var(--app-spacing-lg)}.stats-grid{grid-template-columns:repeat(4,1fr)}}@media(min-width:1024px){:root{--app-spacing-md: 20px;--app-spacing-lg: 28px;--app-spacing-xl: 40px}.app-header ion-toolbar{--min-height: 64px}}@keyframes slideInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.animate-slide-in{animation:slideInUp .4s ease-out forwards}@keyframes pulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.05);opacity:.8}}.animate-pulse{animation:pulse 2s cubic-bezier(.4,0,.6,1) infinite}.app-interactive{transition:var(--app-transition-normal);cursor:pointer}.app-interactive:hover{transform:translateY(-2px);box-shadow:var(--app-shadow-lg)}.app-interactive:active{transform:translateY(0);box-shadow:var(--app-shadow-md)}body.dark :root{--app-white: #1a1a1a;--app-light: #2d2d2d;--app-light-gray: #3a3a3a;--app-dark-gray: #e0e0e0;--app-black: #ffffff}body.dark .app-card{background:var(--app-light);border:1px solid var(--app-light-gray)}