:root {
    --primary-color: #ff85a2;
    --primary-light: #ffd0da;
    --secondary-color: #a5d8ff;
    --text-color: #4a4a4a;
    --light-text: #7a7a7a;
    --background-color: #ffffff;
    --chat-bg: #f7f7f7;
    --user-message-bg: #a5d8ff;
    --bot-message-bg: #ffffff;
    --border-radius: 18px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

.dark-theme {
    --primary-color: #ff85a2;
    --primary-light: #5a3d45;
    --secondary-color: #5b8ab5;
    --text-color: #e0e0e0;
    --light-text: #b0b0b0;
    --background-color: #2d2d2d;
    --chat-bg: #383838;
    --user-message-bg: #5b8ab5;
    --bot-message-bg: #3d3d3d;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Nunito', 'Noto Sans JP', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: var(--transition);
}

.chat-container {
    width: 100%;
    max-width: 400px;
    height: 600px;
    background-color: var(--chat-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.chat-header {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

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

.bot-info {
    margin-left: 15px;
    flex-grow: 1;
}

.bot-info h1 {
    font-size: 1.2rem;
    font-weight: 700;
}

.bot-info p {
    font-size: 0.8rem;
    opacity: 0.9;
}

.header-actions button {
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.header-actions button:hover {
    transform: scale(1.1);
}

.chat-messages {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    display: flex;
    max-width: 80%;
}

.bot-message {
    align-self: flex-start;
}

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

.message-avatar img {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    object-fit: cover;
}

.message-content {
    margin: 0 10px;
    padding: 12px 15px;
    border-radius: var(--border-radius);
    position: relative;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    line-height: 1.5;
    word-break: break-word;
}

.bot-message .message-content {
    background-color: var(--bot-message-bg);
    border-top-left-radius: 5px;
}

.user-message .message-content {
    background-color: var(--user-message-bg);
    border-top-right-radius: 5px;
    color: #fff;
}

.message-time {
    font-size: 0.7rem;
    color: var(--light-text);
    margin-top: 5px;
    display: block;
}

.chat-input-area {
    padding: 15px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
}

.input-container {
    display: flex;
    align-items: center;
    background-color: var(--bot-message-bg);
    border-radius: 30px;
    padding: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.emoji-button, .send-button {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--primary-color);
    cursor: pointer;
    padding: 8px 12px;
    transition: var(--transition);
}

.emoji-button:hover, .send-button:hover {
    transform: scale(1.1);
}

#userInput {
    flex-grow: 1;
    border: none;
    outline: none;
    padding: 8px 12px;
    font-family: 'Nunito', 'Noto Sans JP', sans-serif;
    font-size: 0.95rem;
    background: transparent;
    color: var(--text-color);
}

#userInput::placeholder {
    color: var(--light-text);
}

.emoji-picker {
    position: absolute;
    bottom: 80px;
    left: 20px;
    background-color: var(--bot-message-bg);
    border-radius: 15px;
    box-shadow: var(--shadow);
    padding: 10px;
    display: none;
    z-index: 10;
}

.emoji-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.emoji {
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.emoji:hover {
    transform: scale(1.2);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.message {
    animation: fadeIn 0.3s ease;
}

/* Typing indicator animation */
.typing-indicator .dot {
    display: inline-block;
    animation: typingDot 1.4s infinite;
    opacity: 0;
}

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

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

@keyframes typingDot {
    0% { opacity: 0; }
    50% { opacity: 1; }
    100% { opacity: 0; }
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background-color: var(--primary-light);
    border-radius: 10px;
}

/* Status indicator */
.status-indicator {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 10px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    opacity: 0.8;
}

/* Responsive design */
@media (max-width: 450px) {
    .chat-container {
        height: 100vh;
        max-width: 100%;
        border-radius: 0;
    }
    
    .chat-header {
        border-radius: 0;
    }
}