:root{--primary-color: #6366f1;--font-family: "Inter", sans-serif;--danger-color: #E53935;--success-color: #00C853;--text-color-light: #111827;--text-muted-color-light: #4B5563;--background-start-light: #e0e7ff;--background-end-light: #c7d2fe;--card-bg-light: rgba(255, 255, 255, .55);--card-border-light: rgba(238, 242, 255, .8);--header-footer-bg-light: rgba(255, 255, 255, .75);--shadow-color-light: rgba(67, 56, 202, .1);--input-bg-light: #fff;--btn-secondary-bg-light: #fff;--btn-secondary-border-light: #e0e7ff;--disabled-color-light: #D1D5DB}body.dark{--text-color-dark: #E5E7EB;--text-muted-color-dark: #9CA3AF;--background-start-dark: #1e1b4b;--background-end-dark: #1e293b;--card-bg-dark: rgba(30, 41, 59, .5);--card-border-dark: rgba(255, 255, 255, .1);--header-footer-bg-dark: rgba(15, 23, 42, .75);--shadow-color-dark: rgba(0, 0, 0, .2);--input-bg-dark: #1e293b;--btn-secondary-bg-dark: rgba(255,255,255,.1);--btn-secondary-border-dark: rgba(255,255,255,.2);--disabled-color-dark: #4B5563}*,*:before,*:after{box-sizing:border-box}body{--text-color: var(--text-color-light);--text-muted-color: var(--text-muted-color-light);--background-start: var(--background-start-light);--background-end: var(--background-end-light);--card-bg: var(--card-bg-light);--card-border: var(--card-border-light);--header-footer-bg: var(--header-footer-bg-light);--shadow-color: var(--shadow-color-light);--input-bg: var(--input-bg-light);--btn-secondary-bg: var(--btn-secondary-bg-light);--btn-secondary-border: var(--btn-secondary-border-light);--disabled-color: var(--disabled-color-light);margin:0;font-family:var(--font-family);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background .3s ease-in-out,color .3s ease-in-out}body.dark{--text-color: var(--text-color-dark);--text-muted-color: var(--text-muted-color-dark);--background-start: var(--background-start-dark);--background-end: var(--background-end-dark);--card-bg: var(--card-bg-dark);--card-border: var(--card-border-dark);--header-footer-bg: var(--header-footer-bg-dark);--shadow-color: var(--shadow-color-dark);--input-bg: var(--input-bg-dark);--btn-secondary-bg: var(--btn-secondary-bg-dark);--btn-secondary-border: var(--btn-secondary-border-dark);--disabled-color: var(--disabled-color-dark)}.app-container{display:flex;flex-direction:column;min-height:100vh;padding-top:80px;padding-bottom:120px;background:linear-gradient(165deg,var(--background-start) 0%,var(--background-end) 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input{margin-bottom:1rem}.project-saved-message{text-align:center;font-weight:600;color:var(--success-color)}.page-content.chat-page-container{padding:0;display:flex;flex-direction:column;height:100%}.chat-messages{flex:1;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:1rem}.chat-message{padding:.75rem 1.25rem;border-radius:1.25rem;max-width:80%;width:-moz-fit-content;width:fit-content;line-height:1.6;word-wrap:break-word}.user-message{background-color:var(--primary-color);color:#fff;border-bottom-right-radius:.25rem;align-self:flex-end}.model-message{background-color:var(--card-bg);border:1px solid var(--card-border);border-bottom-left-radius:.25rem;align-self:flex-start}.chat-input-form{display:flex;gap:.5rem;padding:1rem;border-top:1px solid var(--card-border);background-color:var(--header-footer-bg)}.chat-input{flex-grow:1;border:none;background:transparent;padding:.75rem;font-size:1rem;color:var(--text-color)}.chat-input:focus{outline:none}.chat-send-btn{background-color:var(--primary-color);border:none;border-radius:50%;width:48px;height:48px;display:grid;place-content:center;color:#fff;cursor:pointer;flex-shrink:0}.chat-send-btn:disabled{background-color:var(--disabled-color);cursor:not-allowed}.typing-indicator span{height:8px;width:8px;background-color:var(--text-muted-color);border-radius:50%;display:inline-block;animation:bounce 1.4s infinite ease-in-out both}.typing-indicator span:nth-of-type(1){animation-delay:-.32s}.typing-indicator span:nth-of-type(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.flashcards-page-container{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;width:100%;gap:1rem;padding:1.5rem 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.25rem}.history-item-subtitle{font-size:.875rem;margin:0;color:var(--text-muted-color)}.history-item-delete-btn{background:none;border:none;cursor:pointer;color:var(--text-muted-color);padding:.5rem;border-radius:50%;transition:all .2s}.history-item-delete-btn:hover{color:var(--danger-color);background-color:#e539351a}.profile-avatar{width:8rem;height:8rem;border-radius:9999px;background-color:#ccc;background-size:cover;background-position:center;border:4px solid white;box-shadow:0 4px 15px #0000001a}body.dark .profile-avatar{border-color:#1f2937}.profile-edit-button{position:absolute;bottom:0;right:0;width:2.5rem;height:2.5rem;border-radius:9999px;background:var(--primary-color);color:#fff;display:grid;place-content:center;border:2px solid white;cursor:pointer}body.dark .profile-edit-button{border-color:#1f2937}.settings-section-title{font-size:1rem;font-weight:600;margin:1.5rem 0 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button{flex:1;padding:.75rem;border:none;background:none;cursor:pointer;font-size:.875rem;font-weight:600;transition:all .3s;color:var(--text-muted-color)}.segmented-control button.active{background:var(--primary-color);color:#fff;box-shadow:0 2px 10px #6366f133}.empty-state{text-align:center;padding:3rem 1.5rem;display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:.5rem}.empty-state-icon{font-size:3.5rem;color:var(--primary-color);background-color:#6366f11a;border-radius:50%;width:6rem;height:6rem;display:grid;place-content:center;margin-bottom:1.5rem}.empty-state h2{margin:0 0 .5rem;font-size:1.5rem}.empty-state p{margin:0 0 1.5rem;color:var(--text-muted-color);max-width:350px;line-height:1.6}.empty-state .btn{margin-top:1rem}.error-banner{background-color:var(--danger-color);color:#fff;padding:1rem;text-align:center;font-weight:500}.toast-container{position:fixed;top:90px;right:1.5rem;z-index:2000;display:flex;flex-direction:column;gap:.75rem}.toast-message{display:flex;align-items:center;gap:.75rem;padding:1rem 1.5rem;border-radius:.75rem;box-shadow:0 5px 15px #0000001a;color:#fff;width:100%;max-width:350px;animation:slideInRight .3s ease-out}@keyframes slideInRight{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}.toast-message.success{background-color:var(--success-color)}.toast-message.error{background-color:var(--danger-color)}.toast-message.info{background-color:#2196f3}.toast-message p{margin:0;flex:1}.toast-message button{background:none;border:none;color:#fff;opacity:.7;cursor:pointer;font-size:1.25rem;line-height:1}.pricing-page{max-width:1200px;margin:0 auto}.pricing-grid{display:grid;grid-template-columns:1fr;gap:1.5rem}@media(min-width:900px){.pricing-grid{grid-template-columns:repeat(3,1fr)}}.plan-card{background-color:var(--card-bg);border:1px solid var(--card-border);border-radius:1.5rem;padding:2rem;text-align:center;display:flex;flex-direction:column;position:relative;overflow:hidden;transition:transform .3s,box-shadow .3s}.plan-card:hover{transform:translateY(-5px);box-shadow:0 12px 40px var(--shadow-color)}.plan-card.featured{border:2px solid var(--primary-color);transform:scale(1.05)}@media(max-width:899px){.plan-card.featured{transform:scale(1)}}.plan-title{font-size:1.25rem;font-weight:700;margin:0 0 .5rem}.plan-price{font-size:2.5rem;font-weight:900;margin:0}.plan-subtext{margin:.25rem 0 1rem;color:var(--text-muted-color)}.plan-strikethrough{text-decoration:line-through;color:var(--text-muted-color);opacity:.7;font-size:.9rem}.plan-badge{position:absolute;top:1rem;right:1rem;background-color:var(--primary-color);color:#fff;padding:.25rem .75rem;border-radius:99px;font-size:.75rem;font-weight:600}.plan-features{list-style:none;padding:0;margin:1.5rem 0;text-align:left;flex-grow:1}.plan-features li{display:flex;align-items:center;gap:.75rem;margin-bottom:.75rem}.plan-features .material-symbols-outlined{color:var(--success-color);font-size:1.25rem}.faq-link{color:var(--text-muted-color);cursor:pointer;text-decoration:underline;font-size:.9rem}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0009;backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn 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var(--danger-color)}.preview-subtitle{font-size:.8rem;color:var(--text-muted-color);margin:0 0 1rem;text-align:center}.preview-row{display:flex;justify-content:space-between;align-items:center;padding:.5rem 0}.preview-select{max-width:150px;padding:.5rem}.status-page .card{max-width:450px;margin-left:auto;margin-right:auto;padding:2.5rem}.status-icon{font-size:3rem;width:5rem;height:5rem;border-radius:50%;display:grid;place-content:center;margin:0 auto 1.5rem}.status-icon.success{background-color:#00c8531a}.status-icon.cancel{background-color:#ffab001a}.upgrade-banner{display:flex;justify-content:space-between;align-items:center;gap:1rem}.upgrade-banner-title{font-size:1.1rem;font-weight:700;margin:0 0 .25rem}.upgrade-banner-text{font-size:.9rem;margin:0;color:var(--text-muted-color)}.pro-gate 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