:root{--color-primary: #1a237e;--color-primary-hover: #283593;--color-primary-light: #e8eaf6;--color-accent: #7c4dff;--color-alert: #ff5252;--color-alert-dark: #d32f2f;--color-alert-bg: #fff8f8;--color-alert-border: #ffebee;--color-info: #2196f3;--color-info-dark: #1565c0;--color-info-bg: #f8fbff;--color-info-border: #e3f2fd;--color-success: #2e7d32;--color-text: #333;--color-text-secondary: #666;--color-text-muted: #888;--color-text-placeholder: #aaa;--color-text-hint: #bbb;--color-text-label: #999;--color-bg: #f5f6fa;--color-bg-white: #fff;--color-bg-hover: #f5f5f5;--color-bg-input: #f5f6fa;--color-bg-table-header: #f5f6fa;--color-border: #e0e0e0;--color-border-light: #f0f0f0;--font-family: "Segoe UI", "Hiragino Sans", "Meiryo", sans-serif;--font-size-xs: 11px;--font-size-sm: 12px;--font-size-base: 13px;--font-size-md: 14px;--font-size-lg: 15px;--font-size-xl: 18px;--font-size-2xl: 22px;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 12px;--spacing-lg: 16px;--spacing-xl: 20px;--spacing-2xl: 24px;--spacing-3xl: 32px;--spacing-4xl: 40px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 10px;--radius-xl: 12px;--radius-full: 50%;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .1);--shadow-md: 0 2px 8px rgba(0, 0, 0, .08);--header-height: 56px;--sidebar-width: 260px;--chat-max-width: 800px}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-family);background:var(--color-bg);color:var(--color-text);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button{font-family:inherit;cursor:pointer}input,textarea{font-family:inherit}a{color:inherit;text-decoration:none}ul,ol{list-style:none}.header{background:var(--color-primary);color:#fff;padding:var(--spacing-md) var(--spacing-2xl);display:flex;align-items:center;justify-content:space-between;box-shadow:var(--shadow-sm);height:var(--header-height);flex-shrink:0}.header-logo{display:flex;align-items:center;gap:var(--spacing-md)}.header-logo-icon{width:32px;height:32px;background:var(--color-accent);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:var(--font-size-md)}.header-title{font-size:var(--font-size-xl);font-weight:600}.header-subtitle{font-size:var(--font-size-sm);opacity:.8}.header-user{display:flex;align-items:center;gap:var(--spacing-sm);font-size:var(--font-size-base)}.header-user-name{font-size:var(--font-size-base)}.header-avatar{width:32px;height:32px;background:var(--color-accent);border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;color:#fff;font-size:var(--font-size-base);font-weight:600}.confirm-dialog-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;display:flex;align-items:center;justify-content:center;background:#0006}.confirm-dialog{background:var(--color-bg-white);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:var(--spacing-2xl);min-width:320px;max-width:400px}.confirm-dialog-title{margin:0 0 var(--spacing-sm);font-size:var(--font-size-lg);font-weight:600;color:var(--color-text)}.confirm-dialog-message{margin:0 0 var(--spacing-xl);font-size:var(--font-size-base);color:var(--color-text-secondary);line-height:1.5}.confirm-dialog-actions{display:flex;justify-content:flex-end;gap:var(--spacing-sm)}.confirm-dialog-btn{padding:var(--spacing-sm) var(--spacing-lg);border:none;border-radius:var(--radius-md);font-size:var(--font-size-md);cursor:pointer;font-weight:500}.confirm-dialog-btn:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.confirm-dialog-btn--cancel{background:var(--color-bg-hover);color:var(--color-text)}.confirm-dialog-btn--cancel:hover{background:var(--color-border)}.confirm-dialog-btn--confirm{background:var(--color-alert);color:#fff}.confirm-dialog-btn--confirm:hover{background:var(--color-alert-dark)}.sidebar{width:var(--sidebar-width);background:var(--color-bg-white);border-right:1px solid var(--color-border);display:flex;flex-direction:column;flex-shrink:0;overflow-y:auto}.sidebar-header{padding:var(--spacing-lg);border-bottom:1px solid var(--color-border)}.sidebar-new-chat-btn{width:100%;padding:10px var(--spacing-lg);background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius-md);font-size:var(--font-size-md);display:flex;align-items:center;gap:var(--spacing-sm);justify-content:center}.sidebar-new-chat-btn:hover{background:var(--color-primary-hover)}.sidebar-section-title{padding:var(--spacing-md) var(--spacing-lg) var(--spacing-sm);font-size:var(--font-size-xs);color:var(--color-text-label);text-transform:uppercase;letter-spacing:.5px}.sidebar-conversation-list{list-style:none;margin:0;padding:0}.sidebar-conversation-item{width:100%;padding:10px var(--spacing-lg);font-size:var(--font-size-base);border:none;background:transparent;border-left:3px solid transparent;display:flex;align-items:center;gap:var(--spacing-sm);text-align:left;color:var(--color-text);cursor:pointer}.sidebar-conversation-item:hover{background:var(--color-bg-hover)}.sidebar-conversation-item--active{background:var(--color-primary-light);border-left-color:var(--color-primary)}.sidebar-conversation-icon{font-size:var(--font-size-lg);opacity:.5;flex-shrink:0}.sidebar-conversation-text{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar-conversation-delete-btn{display:none;flex-shrink:0;margin-left:auto;padding:2px 6px;border:none;border-radius:var(--radius-sm);background:transparent;color:var(--color-text-label);font-size:var(--font-size-sm);line-height:1;cursor:pointer}.sidebar-conversation-delete-btn:hover{background:var(--color-bg-hover);color:var(--color-text)}.sidebar-conversation-delete-btn:focus-visible{display:inline-flex;align-items:center;justify-content:center;outline:2px solid var(--color-primary);outline-offset:1px}.sidebar-conversation-item:hover .sidebar-conversation-delete-btn{display:inline-flex;align-items:center;justify-content:center}.suggestion-card{background:var(--color-bg-white);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--spacing-lg) var(--spacing-xl);margin-bottom:var(--spacing-md);cursor:pointer;transition:all .15s ease;border-left:4px solid var(--color-alert);background:var(--color-alert-bg)}.suggestion-card:hover{border-left-color:var(--color-alert-dark);box-shadow:var(--shadow-md);transform:translate(2px)}.suggestion-card:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.suggestion-card--unread{border-left-color:var(--color-alert)}.suggestion-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--spacing-sm)}.suggestion-card-tag{font-size:var(--font-size-xs);padding:2px var(--spacing-sm);border-radius:var(--radius-sm);font-weight:600;background:var(--color-alert-border);color:var(--color-alert-dark)}.suggestion-card-date{font-size:var(--font-size-xs);color:var(--color-text-placeholder)}.suggestion-card-title{font-size:var(--font-size-lg);font-weight:600;margin-bottom:6px;color:var(--color-text)}.suggestion-card-body{font-size:var(--font-size-base);color:var(--color-text-secondary);line-height:1.6}.suggestion-card-action{margin-top:10px;font-size:var(--font-size-sm);color:var(--color-primary);font-weight:600;display:flex;align-items:center;gap:var(--spacing-xs)}.suggestion-list{max-width:700px;margin:0 auto;width:100%}.suggestion-list-title{font-size:var(--font-size-base);font-weight:600;color:var(--color-primary);margin-bottom:var(--spacing-md);display:flex;align-items:center;gap:var(--spacing-sm)}.suggestion-list-badge{background:var(--color-alert);color:#fff;font-size:var(--font-size-xs);padding:2px var(--spacing-sm);border-radius:10px;font-weight:600}.suggestion-list-cards{display:flex;flex-direction:column}.suggestion-list-empty{text-align:center;padding:var(--spacing-4xl) var(--spacing-xl);color:var(--color-text-muted);font-size:var(--font-size-md)}.chat-input-area{padding:var(--spacing-lg) var(--spacing-2xl);background:var(--color-bg-white);border-top:1px solid var(--color-border)}.chat-input-wrapper{display:flex;align-items:center;gap:var(--spacing-md);max-width:var(--chat-max-width);margin:0 auto;background:var(--color-bg-input);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--spacing-xs) var(--spacing-xs) var(--spacing-xs) var(--spacing-lg)}.chat-input-wrapper:focus-within{border-color:var(--color-primary);box-shadow:0 0 0 2px #1a237e1a}.chat-input{flex:1;border:none;background:transparent;font-size:var(--font-size-md);padding:10px 0;outline:none;font-family:inherit}.chat-input::placeholder{color:var(--color-text-placeholder)}.chat-send-btn{width:40px;height:40px;background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:var(--font-size-xl);flex-shrink:0}.chat-send-btn:hover:not(:disabled){background:var(--color-primary-hover)}.chat-send-btn:disabled{opacity:.5;cursor:not-allowed}.chat-input-hint{text-align:center;font-size:var(--font-size-xs);color:var(--color-text-hint);margin-top:var(--spacing-sm)}.suggestions-page{flex:1;display:flex;flex-direction:column;overflow:hidden}.suggestions-page-content{flex:1;overflow-y:auto;padding:var(--spacing-2xl)}.suggestions-page-content>*{max-width:700px;margin-left:auto;margin-right:auto}.suggestions-welcome{text-align:center;padding:var(--spacing-4xl) var(--spacing-xl)}.suggestions-welcome-icon{font-size:48px;margin-bottom:var(--spacing-lg)}.suggestions-welcome-title{font-size:var(--font-size-2xl);font-weight:600;color:var(--color-primary);margin-bottom:var(--spacing-sm)}.suggestions-welcome-subtitle{font-size:var(--font-size-md);color:var(--color-text-muted);margin-bottom:var(--spacing-3xl)}.suggestions-loading{text-align:center;color:var(--color-text-muted);padding:var(--spacing-2xl)}.suggestions-error{text-align:center;color:var(--color-alert-dark);padding:var(--spacing-2xl)}.chat-message{display:flex;gap:var(--spacing-md);max-width:var(--chat-max-width)}.chat-message--user{align-self:flex-end;flex-direction:row-reverse}.chat-message-avatar{width:36px;height:36px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;font-size:var(--font-size-md);font-weight:600;flex-shrink:0}.chat-message--ai .chat-message-avatar{background:var(--color-primary-light);color:var(--color-primary)}.chat-message--user .chat-message-avatar{background:var(--color-accent);color:#fff}.chat-message-content{padding:var(--spacing-md) var(--spacing-lg);font-size:var(--font-size-md);line-height:1.7;white-space:pre-wrap;word-break:break-word}.chat-message--ai .chat-message-content{background:var(--color-bg-white);border:1px solid var(--color-border);border-radius:var(--radius-xl) var(--radius-xl) var(--radius-xl) 2px}.chat-message--user .chat-message-content{background:var(--color-primary);color:#fff;border-radius:var(--radius-xl) var(--radius-xl) 2px var(--radius-xl)}.chat-message--loading .chat-message-content{color:var(--color-text-muted)}.chat-message-loading-spinner{width:16px;height:16px;border:2px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:chat-message-loading-spin .8s linear infinite}@keyframes chat-message-loading-spin{to{transform:rotate(360deg)}}.chat-message-list{flex:1;overflow-y:auto;padding:var(--spacing-2xl);display:flex;flex-direction:column;gap:var(--spacing-xl)}.chat-page{flex:1;display:flex;flex-direction:column;overflow:hidden}.chat-page-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-2xl);text-align:center}.chat-page-empty-icon{font-size:48px;margin-bottom:var(--spacing-lg)}.chat-page-empty-title{font-size:var(--font-size-2xl);font-weight:600;color:var(--color-primary);margin-bottom:var(--spacing-sm)}.chat-page-empty-subtitle{font-size:var(--font-size-md);color:var(--color-text-muted)}.chat-page-error{text-align:center;color:var(--color-alert-dark);padding:var(--spacing-sm) var(--spacing-2xl);font-size:var(--font-size-base)}.app-layout{display:flex;flex-direction:column;height:100vh;overflow:hidden}.app-main{display:flex;flex:1;overflow:hidden}.app-content{flex:1;display:flex;flex-direction:column;overflow:hidden}