/* ========================================
   カラー変数
   ======================================== */
:root {
    --main-pink: #E5B8C5;
    --light-pink: #F4DDE4;
    --accent-pink: #D89BA8;
    --bg-gradient-start: #FFF8FA;
    --bg-gradient-end: #FFF0F5;
    --text-dark: #4A4A4A;
    --text-light: #FFFFFF;
    --border-color: #F0E0E8;
    --shadow: rgba(229, 184, 197, 0.2);
}

/* ========================================
   基本スタイル
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'M PLUS Rounded 1c', 'Noto Sans JP', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-dark);
}

/* ========================================
   アプリコンテナ
   ======================================== */
.app-container {
    width: 100%;
    max-width: 600px;
    height: 90vh;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px var(--shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ========================================
   ヘッダー
   ======================================== */
.chat-header {
    background: linear-gradient(135deg, var(--main-pink) 0%, var(--accent-pink) 100%);
    color: var(--text-light);
    padding: 20px;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 3px solid white;
    object-fit: cover;
}

.chat-header h1 {
    font-size: 1.2rem;
    font-weight: 600;
}

.status {
    font-size: 0.85rem;
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #4ADE80;
    border-radius: 50%;
    display: inline-block;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ========================================
   チャットエリア
   ======================================== */
.chat-area {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: #FAFAFA;
}

/* スクロールバーのスタイル */
.chat-area::-webkit-scrollbar {
    width: 8px;
}

.chat-area::-webkit-scrollbar-track {
    background: #F5F5F5;
}

.chat-area::-webkit-scrollbar-thumb {
    background: var(--main-pink);
    border-radius: 4px;
}

/* ========================================
   メッセージバブル
   ======================================== */
.message {
    margin-bottom: 20px;
    display: flex;
    gap: 10px;
    animation: fadeInUp 0.4s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
    object-fit: cover;
}

.message-bubble {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: 18px;
    line-height: 1.6;
    word-wrap: break-word;
}

.message.misaki .message-bubble {
    background: white;
    color: var(--text-dark);
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.message.user .message-bubble {
    background: var(--light-pink);
    color: var(--text-dark);
    border-bottom-right-radius: 4px;
}

/* ========================================
   タイピングインジケーター
   ======================================== */
.typing-indicator {
    padding: 0 20px 20px 20px;
    background: #FAFAFA;
    display: flex;
    gap: 10px;
    align-items: center;
}

.typing-dots {
    background: white;
    padding: 12px 16px;
    border-radius: 18px;
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    display: flex;
    gap: 4px;
}

.typing-dots span {
    width: 8px;
    height: 8px;
    background: var(--main-pink);
    border-radius: 50%;
    animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(1) {
    animation-delay: 0s;
}

.typing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingBounce {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-10px);
    }
}

/* ========================================
   入力エリア
   ======================================== */
.input-area {
    padding: 15px 20px;
    background: white;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 10px;
}

#userInput {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--main-pink);
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
    font-family: 'Noto Sans JP', sans-serif;
}

#userInput:focus {
    border-color: var(--accent-pink);
}

#sendBtn {
    padding: 12px 16px;
    background: var(--main-pink);
    color: white;
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

#sendBtn:hover {
    background: var(--accent-pink);
    transform: scale(1.05);
}

#sendBtn:active {
    transform: scale(0.95);
}

/* ========================================
   レスポンシブ対応
   ======================================== */
@media (max-width: 768px) {
    .app-container {
        height: 100vh;
        max-width: 100%;
        border-radius: 0;
    }
    
    .message-bubble {
        max-width: 80%;
    }
    
    .chat-header {
        padding: 15px;
    }
}

/* ========================================
   アクセシビリティ
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    .message,
    .typing-dots span,
    .status-dot,
    #sendBtn {
        animation: none;
    }
}