:root{--raw-light-bg: #f8f9fa;--raw-dark-bg: #202124;--raw-light-surface: #ffffff;--raw-dark-surface: #2d2e30;--raw-light-text-primary: #202124;--raw-dark-text-primary: #e8eaed;--raw-light-text-secondary: #5f6368;--raw-dark-text-secondary: #bdc1c6;--raw-light-primary: #1a73e8;--raw-dark-primary: #8ab4f8;--raw-light-primary-hover: #185abc;--raw-dark-primary-hover: #aecbfa;--raw-light-border: #dadce0;--raw-dark-border: #5f6368;--raw-light-error: #d93025;--raw-dark-error: #f28b82;--raw-light-warning: #ff8c00;--raw-dark-warning: #ffaf4d;--raw-light-card-bg: #e8f0fe;--raw-dark-card-bg: #3c4043;--raw-light-disabled-bg: #e0e0e0;--raw-dark-disabled-bg: #3c4043;--raw-light-disabled-text: #a0a0a0;--raw-dark-disabled-text: #7f8184;--raw-light-shadow-color-1: rgba(60, 64, 67, .15);--raw-dark-shadow-color-1: rgba(0, 0, 0, .3);--raw-light-shadow-color-2: rgba(60, 64, 67, .1);--raw-dark-shadow-color-2: rgba(0, 0, 0, .2);--raw-light-focus-shadow-color: rgba(26, 115, 232, .2);--raw-dark-focus-shadow-color: rgba(138, 180, 248, .3);--raw-light-button-focus-shadow-color: rgba(26, 115, 232, .3);--raw-dark-button-focus-shadow-color: rgba(138, 180, 248, .4);--raw-light-button-text: white;--raw-dark-button-text: var(--raw-dark-bg);--raw-toast-bg-light: #323232;--raw-toast-text-light: #f1f1f1;--raw-toast-bg-dark: #e8eaed;--raw-toast-text-dark: #202124;--raw-toast-audio-reminder-bg-light: #16a085;--raw-toast-audio-reminder-text-light: #ffffff;--raw-toast-audio-reminder-bg-dark: #1abc9c;--raw-toast-audio-reminder-text-dark: var(--raw-dark-bg);--raw-light-modal-backdrop: rgba(0, 0, 0, .5);--raw-dark-modal-backdrop: rgba(0, 0, 0, .7);--raw-light-primary-rgb: 26, 115, 232;--raw-dark-primary-rgb: 138, 180, 248;--raw-nav-item-active-bg-light: rgba(var(--raw-light-primary-rgb), .1);--raw-nav-item-active-bg-dark: rgba(var(--raw-dark-primary-rgb), .2);--raw-burnt-orange-main: #BF5700;--raw-burnt-orange-hover-text-light: #FFFFFF;--raw-burnt-orange-hover-text-dark: var(--raw-dark-bg);--raw-burnt-orange-muted-bg-light: #F5E6D8;--raw-burnt-orange-muted-text-light: #A54F00;--raw-burnt-orange-muted-bg-dark: #4D2F00;--raw-burnt-orange-muted-text-dark: #FFD1A3;--raw-plan-card-border-light: #e0e0e0;--raw-plan-card-border-dark: #4a4a4a;--raw-plan-card-selected-border-light: var(--raw-light-primary);--raw-plan-card-selected-border-dark: var(--raw-dark-primary);--raw-plan-card-bg-light: #ffffff;--raw-plan-card-bg-dark: #35363a;--raw-plan-card-recommended-bg-light: #e8f0fe;--raw-plan-card-recommended-bg-dark: #283246;--raw-plan-card-recommended-border-light: var(--raw-light-primary);--raw-plan-card-recommended-border-dark: var(--raw-dark-primary);--raw-success-color-light: #28a745;--raw-success-color-dark: #73d18f;--raw-first-line-blue-light: #0D47A1;--raw-first-line-blue-dark: #182e51;--raw-faint-paper-line-light: rgba(0, 0, 0, .1);--raw-faint-paper-line-dark: rgba(255, 255, 255, .1);--raw-light-chip-bg: #e2e8f0;--raw-light-chip-text: #2d3748;--raw-dark-chip-bg: #2d3748;--raw-dark-chip-text: #fff;--raw-light-modal-bg: #ffffff;--raw-dark-modal-bg: #1a202c;--raw-deep-gradient-start: #2d3748;--raw-deep-gradient-end: #1a202c;--bg-color: var(--raw-light-bg);--surface-color: var(--raw-light-surface);--text-primary-color: var(--raw-light-text-primary);--text-secondary-color: var(--raw-light-text-secondary);--primary-color: var(--raw-light-primary);--primary-hover-color: var(--raw-light-primary-hover);--primary-rgb: var(--raw-light-primary-rgb);--border-color: var(--raw-light-border);--error-color: var(--raw-light-error);--warning-color: var(--raw-light-warning);--card-bg-color: var(--raw-light-card-bg);--disabled-bg-color: var(--raw-light-disabled-bg);--disabled-text-color: var(--raw-light-disabled-text);--shadow-color-1: var(--raw-light-shadow-color-1);--shadow-color-2: var(--raw-light-shadow-color-2);--focus-shadow-color: var(--raw-light-focus-shadow-color);--button-focus-shadow-color: var(--raw-light-button-focus-shadow-color);--button-text-color: var(--raw-light-button-text);--toast-bg-color: var(--raw-toast-bg-light);--toast-text-color: var(--raw-toast-text-light);--toast-audio-reminder-bg-color: var(--raw-toast-audio-reminder-bg-light);--toast-audio-reminder-text-color: var(--raw-toast-audio-reminder-text-light);--modal-backdrop-color: var(--raw-light-modal-backdrop);--nav-item-active-bg-color: var(--raw-nav-item-active-bg-light);--burnt-orange-hover-text-color: var(--raw-burnt-orange-hover-text-light);--burnt-orange-muted-bg-color: var(--raw-burnt-orange-muted-bg-light);--burnt-orange-muted-text-color: var(--raw-burnt-orange-muted-text-light);--plan-card-border-color: var(--raw-plan-card-border-light);--plan-card-selected-border-color: var(--raw-plan-card-selected-border-light);--plan-card-bg-color: var(--raw-plan-card-bg-light);--plan-card-recommended-bg-color: var(--raw-plan-card-recommended-bg-light);--plan-card-recommended-border-color: var(--raw-plan-card-recommended-border-light);--success-color: var(--raw-success-color-light);--first-line-color: var(--raw-first-line-blue-light);--faint-paper-line-color: var(--raw-faint-paper-line-light);--theme-toggle-slider-bg: #ccc;--theme-toggle-icon-color: white;--theme-toggle-knob-bg: white;--theme-toggle-slider-active-bg: var(--raw-light-primary);--chip-bg: var(--raw-light-chip-bg);--chip-text: var(--raw-light-chip-text);--modal-bg: var(--raw-light-modal-bg);--flashcard-width: 260px;--flashcard-max-width: 240px;--flashcard-height: 180px;--nav-height: 60px;--category-menu-width: 280px;--category-menu-tab-width: 40px;--mobile-nav-width: 250px;--flashcard-height-small: 160px;--pill-radius: 9999px}@media (prefers-color-scheme: dark){:root:not(.light-theme){--bg-color: radial-gradient(circle at top left, var(--raw-deep-gradient-start), var(--raw-deep-gradient-end));--surface-color: rgba(45, 46, 48, .6);--backdrop-blur: 10px;--container-border: 1px solid rgba(255, 255, 255, .1);--text-primary-color: var(--raw-dark-text-primary);--text-secondary-color: var(--raw-dark-text-secondary);--primary-color: var(--raw-dark-primary);--primary-hover-color: var(--raw-dark-primary-hover);--primary-rgb: var(--raw-dark-primary-rgb);--border-color: var(--raw-dark-border);--error-color: var(--raw-dark-error);--warning-color: var(--raw-dark-warning);--card-bg-color: var(--raw-dark-card-bg);--disabled-bg-color: var(--raw-dark-disabled-bg);--disabled-text-color: var(--raw-dark-disabled-text);--shadow-color-1: var(--raw-dark-shadow-color-1);--shadow-color-2: var(--raw-dark-shadow-color-2);--focus-shadow-color: var(--raw-dark-focus-shadow-color);--button-focus-shadow-color: var(--raw-dark-button-focus-shadow-color);--button-text-color: var(--raw-dark-button-text);--toast-bg-color: var(--raw-toast-bg-dark);--toast-text-color: var(--raw-toast-text-dark);--toast-audio-reminder-bg-color: var(--raw-toast-audio-reminder-bg-dark);--toast-audio-reminder-text-color: var(--raw-toast-audio-reminder-text-dark);--modal-backdrop-color: var(--raw-dark-modal-backdrop);--nav-item-active-bg-color: var(--raw-nav-item-active-bg-dark);--burnt-orange-hover-text-color: var(--raw-burnt-orange-hover-text-dark);--burnt-orange-muted-bg-color: var(--raw-burnt-orange-muted-bg-dark);--burnt-orange-muted-text-color: var(--raw-burnt-orange-muted-text-dark);--plan-card-border-color: var(--raw-plan-card-border-dark);--plan-card-selected-border-color: var(--raw-plan-card-selected-border-dark);--plan-card-bg-color: var(--raw-plan-card-bg-dark);--plan-card-recommended-bg-color: var(--raw-plan-card-recommended-bg-dark);--plan-card-recommended-border-color: var(--raw-plan-card-recommended-border-dark);--success-color: var(--raw-success-color-dark);--first-line-color: var(--raw-first-line-blue-dark);--faint-paper-line-color: var(--raw-faint-paper-line-dark);--theme-toggle-slider-bg: #555;--theme-toggle-icon-color: #ddd;--theme-toggle-knob-bg: #bbb;--theme-toggle-slider-active-bg: var(--raw-dark-primary);--chip-bg: var(--raw-dark-chip-bg);--chip-text: var(--raw-dark-chip-text);--modal-bg: var(--raw-dark-modal-bg)}}html.dark-theme{--bg-color: radial-gradient(circle at top left, var(--raw-deep-gradient-start), var(--raw-deep-gradient-end));--surface-color: rgba(45, 46, 48, .6);--backdrop-blur: 10px;--container-border: 1px solid rgba(255, 255, 255, .1);--text-primary-color: var(--raw-dark-text-primary);--text-secondary-color: var(--raw-dark-text-secondary);--primary-color: var(--raw-dark-primary);--primary-hover-color: var(--raw-dark-primary-hover);--primary-rgb: var(--raw-dark-primary-rgb);--border-color: var(--raw-dark-border);--error-color: var(--raw-dark-error);--warning-color: var(--raw-dark-warning);--card-bg-color: var(--raw-dark-card-bg);--disabled-bg-color: var(--raw-dark-disabled-bg);--disabled-text-color: var(--raw-dark-disabled-text);--shadow-color-1: var(--raw-dark-shadow-color-1);--shadow-color-2: var(--raw-dark-shadow-color-2);--focus-shadow-color: var(--raw-dark-focus-shadow-color);--button-focus-shadow-color: var(--raw-dark-button-focus-shadow-color);--button-text-color: var(--raw-dark-button-text);--toast-bg-color: var(--raw-toast-bg-dark);--toast-text-color: var(--raw-toast-text-dark);--toast-audio-reminder-bg-color: var(--raw-toast-audio-reminder-bg-dark);--toast-audio-reminder-text-color: var(--raw-toast-audio-reminder-text-dark);--modal-backdrop-color: var(--raw-dark-modal-backdrop);--nav-item-active-bg-color: var(--raw-nav-item-active-bg-dark);--burnt-orange-hover-text-color: var(--raw-burnt-orange-hover-text-dark);--burnt-orange-muted-bg-color: var(--raw-burnt-orange-muted-bg-dark);--burnt-orange-muted-text-color: var(--raw-burnt-orange-muted-text-dark);--plan-card-border-color: var(--raw-plan-card-border-dark);--plan-card-selected-border-color: var(--raw-plan-card-selected-border-dark);--plan-card-bg-color: var(--raw-plan-card-bg-dark);--plan-card-recommended-bg-color: var(--raw-plan-card-recommended-bg-dark);--plan-card-recommended-border-color: var(--raw-plan-card-recommended-border-dark);--success-color: var(--raw-success-color-dark);--first-line-color: var(--raw-first-line-blue-dark);--faint-paper-line-color: var(--raw-faint-paper-line-dark);--theme-toggle-slider-bg: #555;--theme-toggle-icon-color: #ddd;--theme-toggle-knob-bg: #bbb;--theme-toggle-slider-active-bg: var(--raw-dark-primary);--chip-bg: var(--raw-dark-chip-bg);--chip-text: var(--raw-dark-chip-text);--modal-bg: var(--raw-dark-modal-bg);--flashcard-bg-start: rgba(55, 65, 82, .9);--flashcard-bg-end: rgba(36, 42, 54, .95);--flashcard-border-subtle: rgba(255, 255, 255, .1);--flashcard-line-subtle: rgba(255, 255, 255, .05);--flashcard-line-top: rgba(255, 255, 255, .08)}html.light-theme{--bg-color: var(--raw-light-bg);--surface-color: var(--raw-light-surface);--text-primary-color: var(--raw-light-text-primary);--text-secondary-color: var(--raw-light-text-secondary);--primary-color: var(--raw-light-primary);--primary-hover-color: var(--raw-light-primary-hover);--primary-rgb: var(--raw-light-primary-rgb);--border-color: var(--raw-light-border);--error-color: var(--raw-light-error);--warning-color: var(--raw-light-warning);--card-bg-color: var(--raw-light-card-bg);--disabled-bg-color: var(--raw-light-disabled-bg);--disabled-text-color: var(--raw-light-disabled-text);--shadow-color-1: var(--raw-light-shadow-color-1);--shadow-color-2: var(--raw-light-shadow-color-2);--focus-shadow-color: var(--raw-light-focus-shadow-color);--button-focus-shadow-color: var(--raw-light-button-focus-shadow-color);--button-text-color: var(--raw-light-button-text);--toast-bg-color: var(--raw-toast-bg-light);--toast-text-color: var(--raw-toast-text-light);--toast-audio-reminder-bg-color: var(--raw-toast-audio-reminder-bg-light);--toast-audio-reminder-text-color: var(--raw-toast-audio-reminder-text-light);--modal-backdrop-color: var(--raw-light-modal-backdrop);--nav-item-active-bg-color: var(--raw-nav-item-active-bg-light);--burnt-orange-hover-text-color: var(--raw-burnt-orange-hover-text-light);--burnt-orange-muted-bg-color: var(--raw-burnt-orange-muted-bg-light);--burnt-orange-muted-text-color: var(--raw-burnt-orange-muted-text-light);--plan-card-border-color: var(--raw-plan-card-border-light);--plan-card-selected-border-color: var(--raw-plan-card-selected-border-light);--plan-card-bg-color: var(--raw-plan-card-bg-light);--plan-card-recommended-bg-color: var(--raw-plan-card-recommended-bg-light);--plan-card-recommended-border-color: var(--raw-plan-card-recommended-border-light);--success-color: var(--raw-success-color-light);--first-line-color: var(--raw-first-line-blue-light);--faint-paper-line-color: var(--raw-faint-paper-line-light);--theme-toggle-slider-bg: #ccc;--theme-toggle-icon-color: white;--theme-toggle-knob-bg: white;--theme-toggle-slider-active-bg: var(--raw-light-primary);--chip-bg: var(--raw-light-chip-bg);--chip-text: var(--raw-light-chip-text);--modal-bg: var(--raw-light-modal-bg);--flashcard-bg-start: rgba(255, 255, 255, .95);--flashcard-bg-end: rgba(245, 249, 255, .98);--flashcard-border-subtle: rgba(0, 0, 0, .08);--flashcard-line-subtle: rgba(0, 0, 0, .03);--flashcard-line-top: rgba(0, 0, 0, .06)}*,*:before,*:after{box-sizing:inherit}html{scroll-behavior:smooth;box-sizing:border-box;height:100%;background-color:var(--raw-light-bg);background-image:var(--bg-color);background-attachment:fixed;background-repeat:no-repeat;background-size:cover;transition:background .3s ease}@media (prefers-color-scheme: dark){:root:not(.light-theme){background-color:#1a202c}}html.dark-theme{background-color:#1a202c}html,body{overflow-x:hidden}body{font-family:Google Sans,Roboto,Arial,sans-serif;margin:0;background-color:transparent;color:var(--text-primary-color);display:flex;flex-direction:column;justify-content:flex-start;align-items:center;min-height:100dvh;padding:20px;padding-bottom:calc(20px + env(safe-area-inset-bottom));box-sizing:border-box;padding-top:calc(env(safe-area-inset-top) + var(--nav-height) + 20px);position:relative}.container{width:95%;max-width:900px;text-align:center;box-sizing:border-box;margin-top:10px;flex:1 0 auto;min-height:100vh}.top-navigation{display:grid;grid-template-columns:auto 1fr auto;align-items:center;padding:0 20px;height:var(--nav-height);background-color:var(--surface-color);border-bottom:1px solid var(--border-color);position:fixed;top:0;left:0;right:0;z-index:995;box-shadow:0 2px 4px var(--shadow-color-1);transition:left .3s ease-in-out,right .3s ease-in-out}.hamburger-button{display:none;background:none;border:none;color:var(--text-secondary-color);font-size:1.8em;padding:8px 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ease;font-size:.95em;white-space:nowrap}.nav-item:hover{color:var(--primary-color);background-color:rgba(var(--primary-rgb),.05)}.nav-item.active{color:var(--primary-color);background-color:var(--nav-item-active-bg-color);font-weight:700}.nav-item:focus{outline:none;box-shadow:0 0 0 2px var(--focus-shadow-color)}.auth-container{display:flex;align-items:center;gap:8px;justify-self:end;position:relative}.language-selector-container{margin-right:8px}#languageSelector{padding:8px 30px 8px 15px;border:1px solid var(--border-color);border-radius:var(--pill-radius);background-color:var(--surface-color);color:var(--text-primary-color);font-size:.85em;font-family:inherit;cursor:pointer;-moz-appearance:none;appearance:none;-webkit-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='%235f6368' d='M6 8.5L2 4h8z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;transition:border-color .2s,box-shadow .2s}html.dark-theme #languageSelector{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='%23bdc1c6' d='M6 8.5L2 4h8z'/%3E%3C/svg%3E")}#languageSelector:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px var(--focus-shadow-color)}.nav-auth-button{font-size:.85em;padding:6px 10px;background-color:transparent;color:var(--primary-color);border:1px solid var(--primary-color)}.nav-auth-button:hover:not(:disabled){background-color:rgba(var(--primary-rgb),.05);color:var(--primary-hover-color)}.nav-upgrade-link{font-size:.8em;padding:5px 8px;text-decoration:none;color:var(--warning-color);border:1px solid var(--warning-color);border-radius:4px;font-weight:500;transition:background-color .2s ease,color .2s ease;white-space:nowrap}.nav-upgrade-link:hover{background-color:var(--warning-color);color:var(--raw-dark-text-primary)}html.dark-theme .nav-upgrade-link:hover{color:var(--raw-light-text-primary)}.nav-upgrade-link-pro{font-size:.8em;padding:5px 8px;text-decoration:none;color:var(--primary-color);border:1px solid var(--primary-color);border-radius:4px;font-weight:500;transition:background-color .2s ease,color .2s ease;white-space:nowrap}.nav-upgrade-link-pro:hover{background-color:rgba(var(--primary-rgb),.05);color:var(--primary-hover-color)}#userProfileIconContainer{position:relative}#userProfileIcon{background:none;border:none;padding:0;cursor:pointer;border-radius:50%;overflow:hidden;width:36px;height:36px;display:flex;align-items:center;justify-content:center;box-shadow:none}#userProfileIcon:focus{outline:none;box-shadow:0 0 0 2px var(--button-focus-shadow-color)}#userProfileIcon img{width:100%;height:100%;object-fit:cover}.user-dropdown-menu{position:absolute;top:calc(100% + 8px);right:0;background-color:var(--surface-color);border:1px solid var(--border-color);border-radius:8px;box-shadow:0 4px 12px var(--shadow-color-1);z-index:1010;padding:8px 0;min-width:180px;list-style:none;margin:0}.dropdown-user-email{padding:8px 15px;font-size:.8em;color:var(--text-secondary-color);border-bottom:1px solid var(--border-color);margin-bottom:8px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;pointer-events:none}.dropdown-user-plan{padding:6px 15px;font-size:.75em;color:var(--text-secondary-color);border-bottom:1px solid var(--border-color);margin-bottom:6px;font-style:italic;pointer-events:none}.user-dropdown-menu button{display:block;width:100%;padding:10px 15px;text-align:left;background:none;border:none;color:var(--text-primary-color);font-size:.9em;cursor:pointer;box-shadow:none}.user-dropdown-menu button:hover{background-color:rgba(var(--primary-rgb),.05);color:var(--primary-color)}.user-dropdown-menu 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.deck-status-badge.unlocked{background-color:#1e4620;color:#d4edda;border-color:#2a613b}.action-toast{position:fixed;bottom:30px;left:50%;transform:translate(-50%);background:#333;color:#fff;padding:20px;border-radius:12px;box-shadow:0 4px 15px #0000004d;z-index:20001;width:90%;max-width:400px;animation:slideInUp .3s ease-out}@keyframes slideInUp{0%{transform:translate(-50%,100%);opacity:0}to{transform:translate(-50%);opacity:1}}.action-toast-content{display:flex;flex-direction:column;gap:15px;text-align:center}#actionToastMessage{margin:0;font-size:1.1rem;font-weight:500}.action-toast-buttons{display:flex;gap:10px;justify-content:center}.action-btn-yes,.action-btn-no{padding:10px 20px;border:none;border-radius:6px;cursor:pointer;font-weight:500;flex:1;transition:opacity .2s}.action-btn-yes{background-color:#28a745;color:#fff}.action-btn-no{background-color:#6c757d;color:#fff}.action-btn-yes:hover,.action-btn-no:hover{opacity:.9}.category-chips-container{cursor:grab;-webkit-user-select:none;user-select:none}.chips-wrapper{position:relative;display:flex;align-items:center;width:100%;min-width:0}.scroll-arrow{position:absolute;top:50%;transform:translateY(-50%);background:transparent;border:none;border-radius:0;width:32px;height:32px;display:flex;justify-content:center;align-items:center;cursor:pointer;z-index:10;box-shadow:none;padding:0;color:#555;opacity:0;pointer-events:none;transition:opacity .2s,color .2s,transform .1s;-webkit-user-select:none;user-select:none}.scroll-arrow svg{width:24px;height:24px;display:block}.scroll-arrow.visible{opacity:.6;pointer-events:auto}.scroll-arrow.left{left:-5px}.scroll-arrow.right{right:-5px}.scroll-arrow:hover{background-color:transparent;box-shadow:none;opacity:1!important;color:#1a73e8;transform:translateY(-50%) scale(1.1)}body.dark-mode .scroll-arrow{background:transparent;border-color:transparent;color:#aaa}body.dark-mode .scroll-arrow:hover{background-color:transparent;color:#fff}.deck-selection-modal-content{position:relative}.deck-tickets-container{scrollbar-width:none;-ms-overflow-style:none}.deck-tickets-container::-webkit-scrollbar{display:none}.deck-scroll-arrow{position:absolute;left:50%;transform:translate(-50%);background:transparent;-webkit-backdrop-filter:none;backdrop-filter:none;border:none;border-radius:0;width:100%;height:30px;display:flex;justify-content:center;align-items:center;cursor:pointer;z-index:20;box-shadow:none;padding:0;color:var(--text-secondary-color);opacity:0;pointer-events:none;transition:opacity .2s,transform .1s}.deck-scroll-arrow svg{width:32px;height:32px;filter:drop-shadow(0 1px 2px rgba(0,0,0,.3))}body.dark-mode .deck-scroll-arrow{background:transparent;color:var(--text-primary-color)}.deck-scroll-arrow.visible{opacity:.8;pointer-events:auto}.deck-scroll-arrow:hover{opacity:1;transform:translate(-50%) translateY(-2px);background-color:transparent;color:var(--primary-color)}.deck-scroll-arrow.up{top:50px;background:linear-gradient(to bottom,var(--modal-bg) 0%,transparent 100%)}.deck-scroll-arrow.down{bottom:0;background:linear-gradient(to top,var(--modal-bg) 0%,transparent 100%)}.study-fab{position:fixed;bottom:24px;right:24px;background:linear-gradient(135deg,#6c5ce7,#a29bfe);color:#fff;border:none;border-radius:50px;padding:16px 24px;display:flex;align-items:center;gap:12px;box-shadow:0 4px 15px #6c5ce766;cursor:pointer;z-index:900;transition:transform .2s cubic-bezier(.34,1.56,.64,1),box-shadow .2s ease}.study-fab:active{transform:scale(.95)}.study-fab:hover{transform:translateY(-2px);box-shadow:0 8px 25px #6c5ce799}.study-fab-icon{font-size:1.5rem}.study-fab-text{font-size:1rem;font-weight:600;letter-spacing:.5px}@media (max-width: 768px){.study-fab{bottom:84px;right:20px;padding:14px 20px}}.study-modal-content{background:linear-gradient(135deg,#1e1e2c,#2d3436);border-radius:20px;padding:30px;display:flex;flex-direction:column;max-height:90vh;color:#fff;width:600px;position:relative}.study-modal-content h2{margin-top:10px;margin-bottom:20px;margin-left:10px}.study-dashboard-content{background:#1e1e28f2;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.1);color:#fff;max-width:400px;width:90%;max-height:85vh;display:flex;flex-direction:column;overflow:hidden}.study-dashboard-body{padding:24px;display:flex;flex-direction:column;align-items:stretch;gap:16px;flex:1;min-height:0;overflow:hidden}.study-stat-hero{text-align:center;padding:20px;background:#ffffff0d;border-radius:16px;width:100%}.stat-number{font-size:3.5rem;font-weight:700;color:#a29bfe;line-height:1;margin-bottom:8px;text-shadow:0 0 20px rgba(162,155,254,.3)}.stat-label{color:#ffffffb3;font-size:1rem;font-weight:500;text-transform:uppercase;letter-spacing:1px}.study-filter-section{width:100%;display:flex;flex-direction:column;gap:8px}.study-filter-section label{font-size:.9rem;color:#fffc;margin-left:4px}.study-select{width:100%;padding:12px 16px;border-radius:12px;background:#0000004d;border:1px solid rgba(255,255,255,.1);color:#fff;font-size:1rem;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url(data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23FFFFFF%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E);background-repeat:no-repeat;background-position:right 16px center;background-size:12px}.large-cta{width:100%;padding:16px;font-size:1.1rem;font-weight:600;margin-top:8px;border-radius:12px}.flashcard{cursor:pointer}.flashcard-inner{transition:transform .6s cubic-bezier(.175,.885,.32,1.275)}.study-controls{display:flex;flex-direction:column;align-items:center;gap:12px;margin-top:20px;width:100%}.grading-buttons{display:flex;justify-content:center;gap:12px;width:100%}.grade-btn{border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:12px 24px;font-size:1rem;cursor:pointer;transition:all .2s;color:#fff;text-align:center;min-width:100px;background:#ffffff0d;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.grade-btn:hover:not([disabled]){transform:translateY(-2px);background:#ffffff26;border-color:#ffffff4d}.grade-btn:active:not([disabled]){transform:scale(.98)}.grade-btn.again{border-color:#ffffff26}.grade-btn.good{background:#ffffff14}.grade-btn.easy{background:#ffffff1f}.grade-btn .interval-hint{font-size:.75rem;opacity:.6;margin-top:4px;font-weight:400}.grade-btn[disabled]{opacity:1;background:#ffffff14;color:#ffffff4d;pointer-events:none;transform:none;box-shadow:none}.study-category-list{display:flex;flex-direction:column;gap:12px;width:100%;flex:1;overflow-y:auto;padding-right:4px;max-height:none}.study-category-list::-webkit-scrollbar{width:6px}.study-category-list::-webkit-scrollbar-thumb{background:#fff3;border-radius:4px}.study-category-row{display:flex;align-items:center;gap:16px;padding:12px 16px;background:#ffffff0d;border-radius:12px;cursor:pointer;transition:background .2s,transform .1s;border:1px solid transparent}.study-category-row:hover{background:#ffffff1a;transform:translate(2px);border-color:#ffffff1a}.study-category-row:active{transform:scale(.98)}.cat-icon{font-size:1.5rem;width:40px;text-align:center}.cat-info{flex:1;display:flex;flex-direction:column;gap:2px}.cat-name{font-weight:600;font-size:1rem;color:#fff}.cat-meta{font-size:.8rem;color:#ffffff80}.cat-stat{font-size:.85rem;font-weight:600;padding:6px 12px;border-radius:20px;background:#ffffff0d;color:#fff6;transition:all .2s}.cat-stat.has-due{background:#a29bfe;color:#1e1e2c;box-shadow:0 2px 10px #a29bfe4d}@media (max-width: 640px){.study-modal-content{width:100%!important;max-width:100%!important;height:auto!important;max-height:100dvh!important;border-radius:0!important;padding:0!important;display:flex;flex-direction:column}.study-modal-content h2{margin-top:20px;padding-left:20px}.study-modal-content .modal-body,.study-card-container{overflow-y:auto;-webkit-overflow-scrolling:touch;flex:1;display:flex;flex-direction:column;padding:20px 20px 40px}.flashcard-bundle{flex-direction:row;flex-wrap:wrap;justify-content:center}.study-controls{position:static!important;margin-top:auto;padding-top:20px;background:transparent!important;box-shadow:none!important;padding-bottom:30px}}@media (min-width: 641px){.study-modal-content{height:auto;max-height:90vh}.study-card-container{overflow-y:auto;max-height:calc(90vh - 150px)}}