:root {
    --ego-blue: #1D61FF; 
    --ego-bg: #EAF2FF;   
    --my-msg-bg: #1D61FF;
    --ai-msg-bg: #FFFFFF;
    --text-dark: #1E293B;
    --text-light: #64748B;
    --border-radius: 20px; 
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
    margin: 0; padding: 0;
    font-family: 'Noto Sans KR', sans-serif;
    background-color: var(--ego-bg);
    height: 100vh; display: flex; flex-direction: column;
    overflow: hidden; 
}

.chat-header {
    background-color: #FFFFFF; padding: 16px 20px;
    display: flex; align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05); z-index: 10;
}
.chat-header h1 { margin: 0; font-size: 18px; font-weight: 700; color: var(--text-dark); flex-grow: 1; text-align: center; }

.back-btn { font-size: 18px; color: var(--text-light); cursor: pointer; padding: 4px; }
.header-spacer { width: 24px; flex: 0 0 auto; } /* 제목 가운데 정렬 유지(우측 reset-btn 균형) */
.close-btn { font-size: 20px; color: var(--text-light); cursor: pointer; padding: 4px; flex: 0 0 auto; }
.close-btn:hover { color: var(--ego-blue); }
.reset-btn { font-size: 16px; color: var(--text-light); cursor: pointer; padding: 4px; transition: color 0.2s, transform 0.3s; }
.reset-btn:hover { color: var(--ego-blue); }
.reset-btn.spinning { animation: spin 0.5s linear; }
@keyframes spin { to { transform: rotate(360deg); } }

.maintenance-banner {
    display: none; align-items: center; justify-content: center; gap: 8px;
    background: #FEF3C7; border-bottom: 1px solid #F59E0B;
    padding: 10px 20px; font-size: 14px; color: #92400E;
}
.maintenance-banner.show { display: flex; }

.msg-time { font-size: 11px; color: #94A3B8; margin-top: 5px; }
.message.ai .msg-time { padding-left: 44px; }
.message.my .msg-time { text-align: right; }

/* 🌟 스크롤 컨테이너: 앵커 설정을 통해 갑작스러운 점프 방지 */
.chat-container {
    flex-grow: 1; padding: 20px; overflow-y: auto; 
    display: flex; flex-direction: column; gap: 15px; 
    padding-bottom: 100px; 
    scroll-behavior: auto; /* 타이핑 중에는 smooth보다 auto가 안 흔들림 */
    overflow-anchor: none; /* 브라우저의 자동 스크롤 보정 해제 (충돌 방지) */
}

.message { display: flex; align-items: flex-start; max-width: 85%; }
.message-content {
    padding: 12px 16px; font-size: 15px; line-height: 1.5;
    word-break: break-word; white-space: pre-wrap; 
    min-height: 45px; /* 내용이 없어도 최소 높이 유지 */
}

.message.my { align-self: flex-end; flex-direction: column; align-items: flex-end; }
.message.my .message-content {
    background-color: var(--my-msg-bg); color: #FFFFFF;
    border-radius: var(--border-radius) var(--border-radius) 0 var(--border-radius);
}

.message.ai { align-self: flex-start; flex-direction: column; }
.message-body { display: flex; align-items: flex-start; gap: 8px; width: 100%; }

/* 🌟 아바타 공간 고정 */
.message.ai .avatar {
    width: 36px; height: 36px; min-width: 36px;
    background-color: #FFFFFF; border-radius: 50%; 
    display: flex; align-items: center; justify-content: center;
    margin-top: 2px; border: 1px solid #E2E8F0; overflow: hidden; flex-shrink: 0;
}
.message.ai .avatar img { width: 100%; height: 100%; object-fit: cover; }

.message.ai .message-content {
    background-color: var(--ai-msg-bg); color: var(--text-dark);
    border-radius: var(--border-radius) var(--border-radius) var(--border-radius) 0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

/* 🌟 버튼 그룹 자리를 미리 확보하여 버튼 생성 시 흔들림 방지 */
.button-group {
    display: flex; flex-wrap: wrap; gap: 8px; 
    margin-top: 10px; padding-left: 44px; 
    width: 100%;
}

.action-btn {
    display: inline-block; padding: 10px 18px;
    background-color: #FFFFFF; color: var(--ego-blue);
    border: 1px solid var(--ego-blue); border-radius: 12px;
    text-decoration: none; font-weight: bold; font-size: 14px;
    cursor: pointer; text-align: center;
}

.typing-indicator { display: inline-flex; align-items: center; gap: 4px; padding: 10px 0; }
.typing-indicator span {
    width: 6px; height: 6px; background-color: #CBD5E1; border-radius: 50%;
    animation: bounce 1.3s infinite;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.15s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.3s; }

@keyframes bounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-4px); }
}

.chat-input-area {
    position: fixed; bottom: 0; left: 0; width: 100%; background-color: #FFFFFF;
    padding: 10px 20px 20px; display: flex; align-items: center; gap: 10px;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
}
.input-wrapper {
    flex-grow: 1; background-color: #F8FAFC; border-radius: 30px; 
    padding: 5px 15px; border: 1px solid #E2E8F0; display: flex; align-items: center;
}
#user-input {
    width: 100%; border: none; background: transparent;
    padding: 10px 5px; font-size: 16px; outline: none;
}
.send-btn {
    width: 45px; height: 45px; background-color: var(--ego-blue);
    color: #FFFFFF; border: none; border-radius: 50%; font-size: 18px;
}
.send-btn.disabled { background-color: #E2E8F0; color: #94A3B8; }

/* ── 대화 초기화 확인 모달 ─────────────────────────── */
.reset-modal {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.45);
    z-index: 200;
    align-items: center; justify-content: center;
}
.reset-modal.show { display: flex; }
.reset-modal-box {
    background: #FFFFFF; border-radius: 14px;
    padding: 28px 24px 22px; width: 88%; max-width: 300px;
    text-align: center; box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}
.reset-modal-box p { font-size: 15px; color: #1E293B; font-weight: 500; margin-bottom: 22px; line-height: 1.5; }
.reset-modal-actions { display: flex; gap: 10px; justify-content: center; }
.reset-modal-confirm {
    flex: 1; padding: 10px 0; background: #EF4444; color: white;
    border: none; border-radius: 8px; font-size: 14px; font-weight: 700; cursor: pointer;
}
.reset-modal-cancel {
    flex: 1; padding: 10px 0; background: #94A3B8; color: white;
    border: none; border-radius: 8px; font-size: 14px; font-weight: 700; cursor: pointer;
}