@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;600;700&display=swap");:root{--color-primary:#2563eb;--color-primary-dark:#1d4ed8;--color-primary-light:#dbeafe;--color-accent:#0891b2;--color-success:#059669;--color-warning:#d97706;--color-error:#dc2626;--color-bg:#f0f4f8;--color-surface:#fff;--color-surface-alt:#f8fafc;--color-text:#1e293b;--color-text-secondary:#64748b;--color-border:#e2e8f0;--color-border-focus:#93c5fd;--radius:12px;--radius-sm:8px;--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow:0 1px 3px rgba(0,0,0,.1),0 1px 2px rgba(0,0,0,.06);--shadow-md:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -2px rgba(0,0,0,.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -4px rgba(0,0,0,.1)}*{margin:0;padding:0;box-sizing:border-box}body,html{height:100%;font-family:Noto Sans JP,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.7;-webkit-font-smoothing:antialiased}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e0f2fe,#f0f4f8 50%,#ecfdf5);padding:20px}.login-card{background:var(--color-surface);border-radius:20px;box-shadow:var(--shadow-lg);padding:48px 40px;width:100%;max-width:420px;text-align:center}.login-icon{width:72px;height:72px;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));border-radius:20px;display:flex;align-items:center;justify-content:center;margin:0 auto 24px;font-size:32px}.login-card h1{font-size:24px;font-weight:700;margin-bottom:6px;color:var(--color-text)}.login-card .subtitle{font-size:14px;color:var(--color-text-secondary);margin-bottom:32px}.form-group{margin-bottom:20px;text-align:left}.form-group label{display:block;font-size:13px;font-weight:600;color:var(--color-text-secondary);margin-bottom:6px;letter-spacing:.02em}.form-group input{width:100%;padding:12px 16px;border:2px solid var(--color-border);border-radius:var(--radius-sm);font-size:15px;font-family:inherit;transition:border-color .2s,box-shadow .2s;outline:none;background:var(--color-surface-alt)}.form-group input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(37,99,235,.1);background:var(--color-surface)}.login-btn{width:100%;padding:14px;background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));color:#fff;border:none;border-radius:var(--radius-sm);font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;transition:transform .1s,box-shadow .2s;margin-top:8px}.login-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,.3)}.login-btn:active{transform:translateY(0)}.login-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.login-error{background:#fef2f2;color:var(--color-error);border:1px solid #fecaca;border-radius:var(--radius-sm);padding:10px 14px;font-size:13px;margin-bottom:16px}.app-container{display:flex;flex-direction:column;height:100vh;max-height:100vh;overflow:hidden}.app-header{background:var(--color-surface);border-bottom:1px solid var(--color-border);padding:12px 24px;justify-content:space-between;flex-shrink:0;box-shadow:var(--shadow-sm);z-index:10}.app-header,.header-left{display:flex;align-items:center}.header-left{gap:12px}.header-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}.header-title{font-size:18px;font-weight:700}.header-badge{font-size:11px;background:var(--color-primary-light);color:var(--color-primary);padding:2px 8px;border-radius:10px;font-weight:600}.header-right{gap:12px}.header-right,.user-badge{display:flex;align-items:center}.user-badge{gap:6px}.logout-btn,.user-badge{font-size:13px;color:var(--color-text-secondary)}.logout-btn{padding:6px 14px;border:1px solid var(--color-border);background:var(--color-surface);border-radius:var(--radius-sm);font-family:inherit;cursor:pointer;transition:all .2s}.logout-btn:hover{border-color:var(--color-error);color:var(--color-error);background:#fef2f2}.mode-bar{border-bottom:1px solid var(--color-border);padding:10px 24px;gap:8px;flex-shrink:0;overflow-x:auto}.mode-bar,.mode-btn{background:var(--color-surface);display:flex}.mode-btn{padding:8px 16px;border:1px solid var(--color-border);border-radius:20px;font-size:13px;font-family:inherit;cursor:pointer;white-space:nowrap;transition:all .2s;align-items:center;gap:6px}.mode-btn:hover{background:var(--color-primary-light)}.mode-btn.active,.mode-btn:hover{border-color:var(--color-primary)}.mode-btn.active{background:var(--color-primary);color:#fff}.chat-area{flex:1 1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:16px}.chat-area::-webkit-scrollbar{width:6px}.chat-area::-webkit-scrollbar-track{background:transparent}.chat-area::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}.welcome-message{text-align:center;padding:48px 24px;color:var(--color-text-secondary)}.welcome-message .welcome-icon{font-size:48px;margin-bottom:16px}.welcome-message h2{font-size:20px;font-weight:600;color:var(--color-text);margin-bottom:8px}.welcome-message p{font-size:14px;max-width:400px;margin:0 auto 24px}.quick-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.quick-action-btn{padding:10px 18px;border:1px dashed var(--color-border);background:var(--color-surface);border-radius:var(--radius-sm);font-size:13px;font-family:inherit;cursor:pointer;transition:all .2s;color:var(--color-text-secondary)}.quick-action-btn:hover{border-color:var(--color-primary);border-style:solid;color:var(--color-primary);background:var(--color-primary-light)}.message{display:flex;gap:12px;max-width:85%;animation:fadeIn .3s ease}.message.user{align-self:flex-end;flex-direction:row-reverse}.message.assistant{align-self:flex-start}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.message-avatar{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}.message.user .message-avatar{background:var(--color-primary);color:#fff}.message.assistant .message-avatar{background:linear-gradient(135deg,#e0f2fe,#ecfdf5)}.message-content{padding:14px 18px;border-radius:var(--radius);font-size:14px;line-height:1.8;white-space:pre-wrap;word-wrap:break-word}.message.user .message-content{background:var(--color-primary);color:#fff;border-bottom-right-radius:4px}.message.assistant .message-content{background:var(--color-surface);border:1px solid var(--color-border);border-bottom-left-radius:4px;box-shadow:var(--shadow-sm)}.message-actions{display:flex;gap:6px;margin-top:8px}.action-btn{padding:4px 10px;border:1px solid var(--color-border);background:var(--color-surface-alt);border-radius:6px;font-size:11px;font-family:inherit;cursor:pointer;color:var(--color-text-secondary);transition:all .2s;display:flex;align-items:center;gap:4px}.action-btn:hover{border-color:var(--color-primary);color:var(--color-primary)}.typing-indicator{display:flex;gap:5px;padding:8px 0}.typing-dot{width:8px;height:8px;background:var(--color-text-secondary);border-radius:50%;animation:bounce 1.2s infinite}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-8px)}}.input-area{background:var(--color-surface);border-top:1px solid var(--color-border);padding:16px 24px;flex-shrink:0}.input-wrapper{display:flex;gap:12px;align-items:flex-end;max-width:900px;margin:0 auto}.input-wrapper textarea{flex:1 1;padding:12px 16px;border:2px solid var(--color-border);border-radius:var(--radius);font-size:14px;font-family:inherit;line-height:1.6;resize:none;outline:none;min-height:48px;max-height:160px;transition:border-color .2s,box-shadow .2s;background:var(--color-surface-alt)}.input-wrapper textarea:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(37,99,235,.1);background:var(--color-surface)}.send-btn{width:48px;height:48px;border-radius:var(--radius);border:none;background:var(--color-primary);color:#fff;font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;flex-shrink:0}.send-btn:hover:not(:disabled){background:var(--color-primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,.3)}.send-btn:disabled{opacity:.4;cursor:not-allowed}.input-hint{text-align:center;font-size:11px;color:var(--color-text-secondary);margin-top:8px}@media (max-width:768px){.app-header{padding:10px 16px}.header-title{font-size:15px}.mode-bar{padding:8px 16px}.chat-area{padding:16px}.message{max-width:95%}.input-area{padding:12px 16px}.login-card{padding:36px 28px}.quick-actions{flex-direction:column}}