.app-shell{display:flex;flex-direction:column;min-height:100vh}.app-shell--chat,.app-shell--settings{height:100vh;max-height:100vh;overflow:hidden}.app-header{height:var(--header-height);padding:0 var(--space-8);justify-content:space-between;gap:var(--space-4);border-bottom:1px solid var(--color-border);background:var(--color-surface);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);flex-shrink:0}.app-header,.app-header__left{display:flex;align-items:center}.app-header__left{min-width:0}.app-logo{font-weight:700;font-size:1.25rem;letter-spacing:-.02em;color:var(--color-text);text-decoration:none;display:flex;align-items:center;gap:var(--space-3)}.app-logo__dot{width:8px;height:8px;background:var(--color-success);border-radius:50%;box-shadow:0 0 12px rgba(52,211,153,.5);flex-shrink:0}.app-logo__dot--disconnected{background:var(--color-text-muted);box-shadow:none}.app-logo:hover{color:var(--color-primary)}.app-nav{display:flex;gap:var(--space-2);align-items:center}.app-nav-link{color:var(--color-text-muted);text-decoration:none;font-size:.9375rem;font-weight:500;padding:var(--space-2) var(--space-4);border-radius:var(--radius-md);transition:color .15s ease,background .15s ease}.app-nav-link:hover{color:var(--color-primary);background:var(--color-primary-muted)}.app-nav-link--button{background:none;border:none;font-family:inherit;cursor:pointer}.integration-status{font-size:.75rem;color:var(--color-text-muted);margin-left:var(--space-4);display:none}@media 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rgba(6,182,212,.2)}.chat-message--agent .chat-message__bubble{background:var(--color-surface);border:1px solid var(--color-border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.chat-message__text{margin:0;white-space:pre-wrap;word-break:break-word}.chat-message__attachments{display:flex;flex-wrap:wrap;gap:var(--space-3);margin-top:var(--space-3)}.chat-message__attachment-img{max-width:220px;max-height:220px;border-radius:var(--radius-lg);object-fit:cover;border:1px solid var(--color-border)}.chat-message__attachment-file{font-size:.8125rem;color:var(--color-text-muted)}.chat-message__markdown{font-size:.9375rem;line-height:1.7}.chat-message__markdown p{margin:0 0 var(--space-3) 0}.chat-message__markdown p:last-child{margin-bottom:0}.chat-message__markdown ol,.chat-message__markdown ul{margin:var(--space-3) 0;padding-left:var(--space-6)}.chat-message__markdown a{color:var(--color-primary);text-decoration:underline;text-underline-offset:2px}.chat-message__markdown a:hover{color:var(--color-primary-hover)}.chat-message__inline-code{font-family:var(--font-mono);font-size:.875em;padding:2px 8px;background:var(--color-primary-muted);border-radius:var(--radius-sm);color:var(--color-primary)}.chat-message__pre{margin:var(--space-4) 0;padding:var(--space-5);background:var(--color-surface-elevated);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow-x:auto;font-size:.8125rem}.chat-message__code-block{font-family:var(--font-mono);display:block}.chat-message__cursor{display:inline-block;animation:blink 1s step-end infinite;margin-left:2px;color:var(--color-primary)}@keyframes blink{50%{opacity:0}}.action-card{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);font-size:.875rem;color:var(--color-text-muted)}.action-card__icon{flex-shrink:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center;background:var(--color-primary-muted);border-radius:var(--radius-sm);color:var(--color-primary)}.action-card__label{font-weight:500;color:var(--color-text)}.action-card__detail{margin-left:auto;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:200px}.file-upload-zone{margin-top:var(--space-3)}.file-upload-zone__drop{padding:var(--space-6);border:2px dashed var(--color-border);border-radius:var(--radius-lg);text-align:center;cursor:pointer;transition:all .2s ease}.file-upload-zone__drop--active,.file-upload-zone__drop:hover:not(.file-upload-zone__drop--disabled){border-color:var(--color-primary);background:var(--color-primary-muted)}.file-upload-zone__drop--disabled{cursor:not-allowed;opacity:.5}.file-upload-zone__text{font-size:.9375rem;color:var(--color-text-muted)}.file-upload-zone__error{margin:var(--space-2) 0 0;font-size:.8125rem;color:var(--color-error)}.error-banner{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);padding:var(--space-4) var(--space-5);background:var(--color-error-bg);border:1px solid hsla(0,91%,71%,.3);border-radius:var(--radius-lg);color:var(--color-error)}.error-banner__message{flex:1 1;font-size:.9375rem}.error-banner__actions{display:flex;gap:var(--space-2);flex-shrink:0}.error-banner__btn{padding:var(--space-2) var(--space-4);font-size:.875rem;font-weight:500;color:var(--color-error);background:transparent;border:1px solid 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var(--color-primary);outline-offset:2px}.chat-history-sidebar__body{flex:1 1;min-height:0;overflow:auto;padding:var(--space-2);display:flex;flex-direction:column;gap:var(--space-2)}.chat-history-sidebar--collapsed .chat-history-sidebar__body{padding:var(--space-2);align-items:center}.chat-history-sidebar__new{flex-shrink:0;width:100%;padding:var(--space-3) var(--space-4);border:1px dashed var(--color-border);border-radius:var(--radius-md);background:transparent;color:var(--color-primary);font-size:.875rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast);text-align:left}.chat-history-sidebar__new:focus-visible,.chat-history-sidebar__new:hover{border-color:var(--color-primary);background:var(--color-primary-muted);outline:2px solid var(--color-primary);outline-offset:2px}.chat-history-sidebar--collapsed .chat-history-sidebar__new{width:32px;height:32px;padding:0;display:flex;align-items:center;justify-content:center;font-size:1.25rem;border-style:solid}.chat-history-sidebar__list{list-style:none;margin:0;padding:0;flex:1 1;min-height:0;overflow:auto;display:flex;flex-direction:column;gap:2px}.chat-history-sidebar__item{width:100%;padding:var(--space-3) var(--space-4);border:none;border-radius:var(--radius-md);background:transparent;color:var(--color-text);font-size:.875rem;text-align:left;cursor:pointer;display:flex;flex-direction:column;gap:2px;transition:background var(--transition-fast)}.chat-history-sidebar__item:focus-visible,.chat-history-sidebar__item:hover{background:var(--color-surface-hover);outline:2px solid var(--color-primary);outline-offset:-2px}.chat-history-sidebar__item--active{background:var(--color-primary-muted);color:var(--color-primary)}.chat-history-sidebar__item-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.3}.chat-history-sidebar__item-date{font-size:.75rem;color:var(--color-text-muted)}.chat-history-sidebar__item--active .chat-history-sidebar__item-date{color:var(--color-primary);opacity:.9}.chat-history-sidebar__empty{padding:var(--space-4);font-size:.8125rem;color:var(--color-text-muted);line-height:1.5}@media (max-width:767px){.chat-history-sidebar{position:fixed;left:0;top:var(--header-height,56px);bottom:0;z-index:100;box-shadow:var(--shadow-md)}.chat-history-sidebar--collapsed{width:0;min-width:0;overflow:hidden;border-right:none}}