:root{--color-primary: #4f46e5;--color-primary-hover: #4338ca;--color-primary-light: #eef2ff;--color-bg: #ffffff;--color-bg-secondary: #f9fafb;--color-bg-tertiary: #f3f4f6;--color-text: #111827;--color-text-secondary: #6b7280;--color-text-muted: #9ca3af;--color-border: #e5e7eb;--color-border-light: #f3f4f6;--color-success: #10b981;--color-success-bg: #d1fae5;--color-error: #ef4444;--color-error-bg: #fee2e2;--color-warning: #f59e0b;--color-warning-bg: #fef3c7;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-full: 9999px;--font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--transition-fast: .15s ease;--transition-normal: .2s ease}[data-theme=dark]{--color-primary: #818cf8;--color-primary-hover: #6366f1;--color-primary-light: #1e1b4b;--color-bg: #111827;--color-bg-secondary: #1f2937;--color-bg-tertiary: #374151;--color-text: #f9fafb;--color-text-secondary: #d1d5db;--color-text-muted: #9ca3af;--color-border: #374151;--color-border-light: #1f2937;--color-success-bg: #064e3b;--color-error-bg: #7f1d1d;--color-warning-bg: #78350f;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .3);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .4), 0 2px 4px -2px rgb(0 0 0 / .3);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .4), 0 4px 6px -4px rgb(0 0 0 / .3)}*,*:before,*:after{box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;font-family:var(--font-sans);font-size:1rem;line-height:1.5;color:var(--color-text);background-color:var(--color-bg)}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.button{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);font-family:var(--font-sans);font-size:.875rem;font-weight:500;line-height:1.5;text-decoration:none;border:1px solid transparent;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast)}.button:disabled{opacity:.6;cursor:not-allowed}.button--primary{color:#fff;background-color:var(--color-primary);border-color:var(--color-primary)}.button--primary:hover:not(:disabled){background-color:var(--color-primary-hover);border-color:var(--color-primary-hover)}.button--secondary{color:var(--color-text);background-color:var(--color-bg);border-color:var(--color-border)}.button--secondary:hover:not(:disabled){background-color:var(--color-bg-secondary)}.button--danger{color:#fff;background-color:var(--color-error);border-color:var(--color-error)}.button--danger:hover:not(:disabled){background-color:#dc2626;border-color:#dc2626}.button--ghost{color:var(--color-text-secondary);background-color:transparent;border-color:transparent}.button--ghost:hover:not(:disabled){color:var(--color-text);background-color:var(--color-bg-secondary)}.button--sm{padding:var(--spacing-xs) var(--spacing-sm);font-size:.8125rem}.button--lg{padding:var(--spacing-md) var(--spacing-lg);font-size:1rem}.button--loading{position:relative;color:transparent}.button__spinner{position:absolute;width:1em;height:1em;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin .75s linear infinite}.button--primary .button__spinner{border-color:#fff;border-right-color:transparent}@keyframes spin{to{transform:rotate(360deg)}}.input-group{display:flex;flex-direction:column;gap:var(--spacing-xs)}.input-group__label{font-size:.875rem;font-weight:500;color:var(--color-text)}.input-group__input{width:100%;padding:var(--spacing-sm) var(--spacing-md);font-family:var(--font-sans);font-size:1rem;color:var(--color-text);background-color:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.input-group__input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-light)}.input-group__input::placeholder{color:var(--color-text-muted)}.input-group--error .input-group__input{border-color:var(--color-error)}.input-group--error .input-group__input:focus{box-shadow:0 0 0 3px var(--color-error-bg)}.input-group__error{margin:0;font-size:.8125rem;color:var(--color-error)}.input-group__help{margin:0;font-size:.8125rem;color:var(--color-text-muted)}.card{padding:var(--spacing-lg);background-color:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg)}.card__title{margin:0 0 var(--spacing-md);font-size:1.125rem;font-weight:600;color:var(--color-text)}.card__content{display:flex;flex-direction:column;gap:var(--spacing-md)}.file-upload{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-xl);border:2px dashed var(--color-border);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-fast)}.file-upload:hover:not(.file-upload--disabled){border-color:var(--color-primary);background-color:var(--color-primary-light)}.file-upload--dragging{border-color:var(--color-primary);background-color:var(--color-primary-light)}.file-upload--disabled{opacity:.6;cursor:not-allowed}.file-upload__input{display:none}.file-upload__content{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-sm);text-align:center}.file-upload__icon{width:3rem;height:3rem;color:var(--color-text-muted)}.file-upload__text{margin:0;font-weight:500;color:var(--color-text)}.file-upload__hint{margin:0;font-size:.875rem;color:var(--color-text-muted)}.toggle{display:inline-flex;align-items:center;gap:var(--spacing-sm);cursor:pointer}.toggle--disabled{opacity:.6;cursor:not-allowed}.toggle__input{display:none}.toggle__slider{position:relative;width:2.75rem;height:1.5rem;background-color:var(--color-bg-tertiary);border-radius:var(--radius-full);transition:background-color var(--transition-fast)}.toggle__slider:after{content:"";position:absolute;top:.125rem;left:.125rem;width:1.25rem;height:1.25rem;background-color:#fff;border-radius:50%;box-shadow:var(--shadow-sm);transition:transform var(--transition-fast)}.toggle__input:checked+.toggle__slider{background-color:var(--color-primary)}.toggle__input:checked+.toggle__slider:after{transform:translate(1.25rem)}.toggle__label{font-size:.875rem;color:var(--color-text)}.chat-page{display:flex;flex-direction:column;height:100vh;height:100dvh}.chat-page__header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md) var(--spacing-lg);background-color:var(--color-bg);border-bottom:1px solid var(--color-border)}.chat-page__brand{display:flex;align-items:center;gap:var(--spacing-sm)}.chat-page__logo{width:2rem;height:2rem;color:var(--color-primary)}.chat-page__title{margin:0;font-size:1.25rem;font-weight:600;color:var(--color-text)}.chat-page__settings-link{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);font-size:.875rem;color:var(--color-text-secondary);text-decoration:none;border-radius:var(--radius-md);transition:all var(--transition-fast)}.chat-page__settings-link:hover{color:var(--color-text);background-color:var(--color-bg-secondary);text-decoration:none}.chat-page__settings-link svg{width:1.25rem;height:1.25rem}.chat-page__main{flex:1;overflow:hidden}.chat-layout{display:flex;flex-direction:column;height:100%;background-color:var(--color-bg-secondary)}.chat-layout__messages{flex:1;overflow-y:auto;padding:var(--spacing-lg)}.chat-layout__empty{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;padding:var(--spacing-xl);text-align:center}.chat-layout__empty-icon{width:4rem;height:4rem;margin-bottom:var(--spacing-md);color:var(--color-text-muted)}.chat-layout__empty-title{margin:0 0 var(--spacing-sm);font-size:1.25rem;font-weight:600;color:var(--color-text)}.chat-layout__empty-text{margin:0;max-width:24rem;color:var(--color-text-secondary)}.chat-layout__disabled{padding:var(--spacing-lg);background-color:var(--color-bg);border-top:1px solid var(--color-border)}.chat-disabled{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-md);padding:var(--spacing-xl);text-align:center}.chat-disabled__icon{width:3rem;height:3rem;color:var(--color-text-muted)}.chat-disabled__title{margin:0;font-size:1.125rem;font-weight:600;color:var(--color-text)}.chat-disabled__text{margin:0;max-width:20rem;color:var(--color-text-secondary)}.chat-input{display:flex;gap:var(--spacing-sm);padding:var(--spacing-md) var(--spacing-lg);background-color:var(--color-bg);border-top:1px solid var(--color-border)}.chat-input__textarea{flex:1;min-height:2.5rem;max-height:10rem;padding:var(--spacing-sm) var(--spacing-md);font-family:var(--font-sans);font-size:1rem;color:var(--color-text);background-color:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-lg);resize:none;transition:border-color var(--transition-fast)}.chat-input__textarea:focus{outline:none;border-color:var(--color-primary)}.chat-input__textarea::placeholder{color:var(--color-text-muted)}.chat-input__button{flex-shrink:0;width:2.5rem;height:2.5rem;padding:0;border-radius:var(--radius-lg)}.chat-input__button svg{width:1.25rem;height:1.25rem}.chat-message{display:flex;gap:var(--spacing-md);margin-bottom:var(--spacing-lg)}.chat-message--user{flex-direction:row-reverse}.chat-message__avatar{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:2.5rem;height:2.5rem;border-radius:var(--radius-full)}.chat-message__avatar svg{width:1.25rem;height:1.25rem}.chat-message__avatar--user{background-color:var(--color-primary);color:#fff}.chat-message__avatar--assistant{background-color:var(--color-bg-tertiary);color:var(--color-text-secondary)}.chat-message__content{max-width:70%;padding:var(--spacing-md);border-radius:var(--radius-lg)}.chat-message--user .chat-message__content{background-color:var(--color-primary);color:#fff;border-bottom-right-radius:var(--radius-sm)}.chat-message--assistant .chat-message__content{background-color:var(--color-bg);border:1px solid var(--color-border);border-bottom-left-radius:var(--radius-sm)}.chat-message__text{margin:0;white-space:pre-wrap;word-wrap:break-word}.chat-message__text--error{color:var(--color-error)}.chat-message__loading{display:flex;gap:var(--spacing-xs);padding:var(--spacing-sm) 0}.chat-message__loading-dot{width:.5rem;height:.5rem;background-color:var(--color-text-muted);border-radius:50%;animation:bounce 1.4s ease-in-out infinite both}.chat-message__loading-dot:nth-child(1){animation-delay:-.32s}.chat-message__loading-dot:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.source-list{margin-top:var(--spacing-md);padding-top:var(--spacing-md);border-top:1px solid var(--color-border-light)}.source-list__title{margin:0 0 var(--spacing-sm);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted)}.source-list__items{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:var(--spacing-xs)}.source-list__item{margin:0}.source-list__link{display:inline-flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-xs) var(--spacing-sm);font-size:.875rem;color:var(--color-primary);text-decoration:none;background-color:var(--color-primary-light);border-radius:var(--radius-sm);transition:all var(--transition-fast)}.source-list__link:hover{text-decoration:none;background-color:var(--color-primary);color:#fff}.source-list__number{display:inline-flex;align-items:center;justify-content:center;width:1.25rem;height:1.25rem;font-size:.75rem;font-weight:600;background-color:var(--color-primary);color:#fff;border-radius:var(--radius-full)}.source-list__link:hover .source-list__number{background-color:#fff;color:var(--color-primary)}.source-list__title-text{flex:1}.source-list__external-icon{width:.875rem;height:.875rem;opacity:.7}.settings-page{min-height:100vh;background-color:var(--color-bg-secondary)}.settings-page__header{padding:var(--spacing-lg);background-color:var(--color-bg);border-bottom:1px solid var(--color-border)}.settings-page__back{display:inline-flex;align-items:center;gap:var(--spacing-xs);margin-bottom:var(--spacing-md);font-size:.875rem;color:var(--color-text-secondary);text-decoration:none}.settings-page__back:hover{color:var(--color-text);text-decoration:none}.settings-page__back svg{width:1rem;height:1rem}.settings-page__title{margin:0;font-size:1.5rem;font-weight:600;color:var(--color-text)}.settings-page__content{display:flex;flex-direction:column;gap:var(--spacing-lg);max-width:40rem;margin:0 auto;padding:var(--spacing-lg)}.settings-card__description{margin:0;color:var(--color-text-secondary)}.settings-card__hint{margin:0;font-size:.875rem;color:var(--color-text-muted)}.settings-card__hint a{color:var(--color-primary)}.settings-card__form{display:flex;flex-direction:column;gap:var(--spacing-md)}.settings-card__input-wrapper{position:relative}.settings-card__input-wrapper .input-group__input{padding-right:3rem}.settings-card__toggle-visibility{position:absolute;right:.75rem;top:50%;transform:translateY(-50%);display:flex;align-items:center;justify-content:center;width:2rem;height:2rem;padding:0;background:none;border:none;color:var(--color-text-muted);cursor:pointer}.settings-card__toggle-visibility:hover{color:var(--color-text)}.settings-card__toggle-visibility svg{width:1.25rem;height:1.25rem}.settings-card__status{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-md);flex-wrap:wrap}.settings-card__status-badge{display:inline-flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-xs) var(--spacing-sm);font-size:.875rem;font-weight:500;border-radius:var(--radius-md)}.settings-card__status-badge svg{width:1rem;height:1rem}.settings-card__status-badge--success{background-color:var(--color-success-bg);color:var(--color-success)}.settings-card__warning{display:flex;align-items:flex-start;gap:var(--spacing-sm);padding:var(--spacing-md);font-size:.875rem;color:var(--color-warning);background-color:var(--color-warning-bg);border-radius:var(--radius-md)}.settings-card__warning svg{flex-shrink:0;width:1.25rem;height:1.25rem}.settings-card__upload{display:flex;flex-direction:column;gap:var(--spacing-sm)}.settings-card__progress{margin:0;font-size:.875rem;color:var(--color-primary)}.settings-card__error{margin:0;font-size:.875rem;color:var(--color-error)}.settings-card__success{margin:0;font-size:.875rem;color:var(--color-success)}.settings-card__row{display:flex;align-items:center;justify-content:space-between}.settings-card__status-badge--info{background-color:var(--color-primary-light);color:var(--color-primary)}.settings-card__knowledge-status{display:flex;flex-direction:column;gap:var(--spacing-md)}.settings-card__filename{display:flex;align-items:center;gap:var(--spacing-xs);margin:0;font-size:.875rem;color:var(--color-text-secondary)}.settings-card__filename svg{width:1rem;height:1rem;flex-shrink:0}.settings-card__actions{display:flex;gap:var(--spacing-sm)}.settings-card__knowledge-options{display:flex;flex-direction:column;gap:var(--spacing-md)}.settings-card__divider{display:flex;align-items:center;gap:var(--spacing-md);color:var(--color-text-muted);font-size:.875rem}.settings-card__divider:before,.settings-card__divider:after{content:"";flex:1;height:1px;background-color:var(--color-border)}@media(max-width:640px){.chat-page__header{padding:var(--spacing-sm) var(--spacing-md)}.chat-page__title{font-size:1rem}.chat-page__settings-link span{display:none}.chat-layout__messages{padding:var(--spacing-md)}.chat-input{padding:var(--spacing-sm) var(--spacing-md)}.chat-message__content{max-width:85%}.settings-page__content{padding:var(--spacing-md)}.settings-card__status{flex-direction:column;align-items:flex-start}}