@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";:root{--sidebar-width:220px;--content-max-width:1440px;--font-family-sans:"Inter", system-ui, 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#0003;--focus-ring:#1877f273;--color-primary:#1877f2;--color-primary-hover:#0d6efd;--color-primary-soft:#e7f3ff;--color-primary-pale:#f5f9ff;--color-primary-muted:#8cb4f7;--color-text:#050505;--color-text-muted:#65676b;--color-text-inverse:#fff;--color-sidebar-text:#eaf2ff;--color-sidebar-muted:#c7dcff;--color-page:#f0f2f5;--color-page-deep:#e4e6eb;--color-surface:#fff;--color-border:#dadde1;--color-accent:#f7b928;--color-accent-soft:#fff4d6;--color-accent-strong:#8a6500;--color-success:#4777c8;--color-success-text:#267a3e;--color-success-soft:#eaf7ed;--color-success-border:#b9e3c1;--color-danger:#a25e54;--paper:var(--color-page);--paper-deep:var(--color-page-deep);--ink:var(--color-text);--muted:var(--color-text-muted);--line:var(--color-border);--navy:var(--color-primary);--navy-dark:var(--color-primary-hover);--mint:var(--color-primary-soft);--mint-pale:var(--color-primary-pale);--mint-strong:var(--color-primary-muted);--coral:var(--color-accent);--coral-pale:var(--color-accent-soft);--white:var(--color-surface);--shadow:var(--shadow-md)}.c-surface{border:1px 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var(--line);color:var(--navy);box-shadow:var(--shadow-sm);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffeb;border-radius:12px;place-items:center;display:grid;position:fixed;left:14px}.chat-sessions-toggle svg{width:var(--mobile-icon-size);height:var(--mobile-icon-size);fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.8px}.chat-sessions{top:calc(env(safe-area-inset-top) + 62px);z-index:30;border:1px solid var(--line);background:var(--white);width:min(280px,100vw - 28px);max-height:calc(100dvh - 150px);box-shadow:var(--shadow-lg);border-radius:16px;padding:12px;display:none;position:fixed;left:14px}.chat-sessions.is-open{flex-direction:column;display:flex}.chat-sessions.is-open .chat-session-list{display:grid;overflow-y:auto}.chat-sessions.is-open .chat-session-item{background:0 0;min-width:0}.simple-chat-page{height:100dvh;min-height:100dvh}.simple-chat-messages{min-height:0;padding:62px 0 var(--chat-bottom-space)}.simple-chat-messages .ai-chat-message{max-width:88%}.simple-chat-send{width:38px;height:38px;font-size:16px}.simple-chat-composer .ai-chat-form{padding:3px 6px 3px 12px}.simple-chat-composer .ai-chat-form input{height:38px;padding:0}.ai-spark{width:42px;height:42px;font-size:var(--font-size-lg);flex-basis:42px}.secondary-button,.form-actions .primary-button{min-height:48px;font-size:var(--font-size-md);padding:12px 16px}.form-actions{flex-direction:column;align-items:stretch}.form-actions .primary-button{justify-content:center;width:100%}.upload-icon{width:40px;height:40px;font-size:var(--font-size-xl);flex:0 0 40px}.image-preview button{width:var(--mobile-touch-target);height:var(--mobile-touch-target)}.image-preview>span{min-width:0}.simple-chat-composer{width:calc(100vw - 32px);left:50%;bottom:calc(68px + env(safe-area-inset-bottom) + 10px)}#view-ask .simple-chat-composer{width:calc(100vw - 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