:root{--color-primary: #1a5276;--color-primary-light: #2980b9;--color-primary-dark: #0e3a54;--color-accent: #27ae60;--color-bg: #f0f4f8;--color-surface: #ffffff;--color-text: #2c3e50;--color-text-light: #7f8c8d;--color-text-inverse: #ffffff;--color-border: #dce3e8;--color-user-bubble: #1a5276;--color-user-text: #ffffff;--color-bot-bubble: #ffffff;--color-bot-text: #2c3e50;--color-escalation: #e67e22;--color-escalation-bg: #fef5e7;--radius-lg: 20px;--radius-md: 12px;--radius-sm: 8px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 30px rgba(0, 0, 0, .12);--font-family: "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-family);background:var(--color-bg);color:var(--color-text);height:100vh;display:flex;justify-content:center;align-items:center}.chat-container{width:100%;max-width:480px;height:100vh;max-height:720px;background:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;overflow:hidden}.chat-header{background:linear-gradient(135deg,var(--color-primary),var(--color-primary-light));color:var(--color-text-inverse);padding:20px 24px;text-align:center}.chat-header h1{font-size:18px;font-weight:600;margin-bottom:4px}.chat-header p{font-size:13px;opacity:.85}.chat-messages{flex:1;overflow-y:auto;padding:20px 16px;display:flex;flex-direction:column;gap:12px}.chat-messages::-webkit-scrollbar{width:4px}.chat-messages::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:2px}.welcome-section{text-align:center;padding:12px 0}.welcome-section p{font-size:14px;color:var(--color-text-light);margin-bottom:16px}.category-buttons{display:flex;flex-direction:column;gap:10px;padding:0 8px}.category-btn{display:flex;align-items:center;gap:12px;padding:14px 18px;background:var(--color-surface);border:1.5px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:all .2s ease;text-align:left}.category-btn:hover{border-color:var(--color-primary-light);background:#f7fafc;transform:translateY(-1px);box-shadow:var(--shadow-sm)}.category-btn .icon{font-size:24px;flex-shrink:0}.category-btn .label{font-size:15px;font-weight:600;color:var(--color-text)}.category-btn .desc{font-size:12px;color:var(--color-text-light);margin-top:2px}.message{display:flex;flex-direction:column;max-width:85%;animation:fadeInUp .3s ease}.message.user{align-self:flex-end}.message.assistant{align-self:flex-start}.message .bubble{padding:12px 16px;border-radius:var(--radius-md);font-size:14px;line-height:1.6;word-break:break-word}.message.user .bubble{background:var(--color-user-bubble);color:var(--color-user-text);border-bottom-right-radius:4px}.message.assistant .bubble{background:var(--color-bot-bubble);color:var(--color-bot-text);border:1px solid var(--color-border);border-bottom-left-radius:4px}.escalation-card{background:var(--color-escalation-bg);border:1.5px solid var(--color-escalation);border-radius:var(--radius-md);padding:14px 16px;margin-top:8px;max-width:85%;animation:fadeInUp .3s ease}.escalation-card .title{font-size:13px;font-weight:600;color:var(--color-escalation);margin-bottom:6px}.escalation-card .phone{font-size:18px;font-weight:700;color:var(--color-primary)}.escalation-card .note{font-size:12px;color:var(--color-text-light);margin-top:4px}.contact-action{align-self:flex-start;max-width:85%;animation:fadeInUp .3s ease}.contact-btn{display:block;width:100%;padding:12px 20px;background:var(--color-escalation);color:var(--color-text-inverse);border:none;border-radius:var(--radius-md);font-size:14px;font-weight:600;font-family:var(--font-family);cursor:pointer;transition:background .2s ease}.contact-btn:hover{background:#d35400}.contact-form{background:var(--color-surface);border:1.5px solid var(--color-border);border-radius:var(--radius-md);padding:16px}.contact-form-title{font-size:14px;font-weight:600;color:var(--color-text);margin-bottom:12px}.contact-field{margin-bottom:10px}.contact-field label{display:block;font-size:12px;font-weight:500;color:var(--color-text-light);margin-bottom:4px}.contact-field input{width:100%;padding:10px 12px;border:1.5px solid var(--color-border);border-radius:var(--radius-sm);font-size:14px;font-family:var(--font-family);color:var(--color-text);outline:none;transition:border-color .2s}.contact-field input:focus{border-color:var(--color-primary-light)}.contact-form-actions{margin-top:12px}.contact-submit-btn{width:100%;padding:10px 20px;background:var(--color-primary);color:var(--color-text-inverse);border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:600;font-family:var(--font-family);cursor:pointer;transition:background .2s}.contact-submit-btn:hover{background:var(--color-primary-light)}.contact-submit-btn:disabled{background:var(--color-border);cursor:not-allowed}.contact-required{color:#e74c3c;font-weight:600}.contact-optional{color:var(--color-text-light);font-weight:400;font-size:11px}.contact-error{font-size:12px;color:#e74c3c;margin-top:8px}.contact-success{background:#eafaf1;border:1.5px solid var(--color-accent);border-radius:var(--radius-md);padding:14px 16px}.contact-success p{font-size:14px;color:#27ae60;font-weight:500}.typing-indicator{display:flex;align-items:center;gap:4px;padding:12px 16px;background:var(--color-bot-bubble);border:1px solid var(--color-border);border-radius:var(--radius-md);border-bottom-left-radius:4px;max-width:80px;align-self:flex-start}.typing-indicator span{width:6px;height:6px;background:var(--color-text-light);border-radius:50%;animation:bounce 1.4s infinite}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}.chat-input-area{padding:12px 16px;border-top:1px solid var(--color-border);background:var(--color-surface)}.chat-input-wrapper{display:flex;align-items:center;gap:8px;background:var(--color-bg);border-radius:var(--radius-md);padding:4px 4px 4px 16px}.chat-input{flex:1;border:none;background:transparent;font-size:14px;font-family:var(--font-family);color:var(--color-text);outline:none;padding:10px 0}.chat-input::placeholder{color:var(--color-text-light)}.send-btn{width:40px;height:40px;border:none;background:var(--color-primary);color:var(--color-text-inverse);border-radius:var(--radius-sm);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s ease;flex-shrink:0}.send-btn:hover{background:var(--color-primary-light)}.send-btn:disabled{background:var(--color-border);cursor:not-allowed}.send-btn svg{width:18px;height:18px}.message.admin{align-self:flex-start}.message.admin .bubble{background:#e8f0fe;color:#1a3c6e;border:1px solid #c4d7f2;border-bottom-left-radius:4px}.manual-mode-indicator{align-self:center;text-align:center;padding:10px 16px;background:#e8f0fe;border-radius:var(--radius-md);animation:fadeInUp .3s ease}.manual-mode-indicator p{font-size:13px;color:#1a3c6e;font-weight:500}.waiting-indicator{align-self:center;text-align:center;padding:10px 16px;background:#eafaf1;border-radius:var(--radius-md);animation:fadeInUp .3s ease}.waiting-indicator p{font-size:13px;color:#27ae60;font-weight:500}.resolved-indicator{align-self:center;text-align:center;padding:10px 16px;background:#f0f0f0;border-radius:var(--radius-md);animation:fadeInUp .3s ease}.resolved-indicator p{font-size:13px;color:var(--color-text-light);font-weight:500}.chat-input:disabled{opacity:.5;cursor:not-allowed}@keyframes fadeInUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-4px)}}@media(max-width:520px){.chat-container{max-width:100%;max-height:100vh;border-radius:0}}