/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=M+PLUS+Rounded+1c:wght@400;700&family=Noto+Sans+JP:wght@400;700&display=swap');

/* --- CSS Variables (配色) --- */
:root {
    --bg-color: #f0f4f8;
    --main-text-color: #333;
    --primary-color: #007bff;
    --primary-hover-color: #0056b3;
    --accent-color: #ffc107;
    --carzy-bg-color: #ffffff;
    --user-bg-color: #dcf8c6;
    --header-bg-color: #ffffff;
    --border-color: #e0e0e0;
    --font-family-main: 'Noto Sans JP', sans-serif;
    --font-family-rounded: 'M PLUS Rounded 1c', sans-serif;
}

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

body {
    font-family: var(--font-family-main);
    background-color: var(--bg-color);
    color: var(--main-text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 10px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Game Container --- */
#game-container {
    width: 100%;
    max-width: 420px;
    height: 90vh;
    max-height: 800px;
    background-color: var(--bg-color);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

/* --- Header --- */
#header {
    background-color: var(--header-bg-color);
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

#status-display {
    text-align: right;
}

#score-display {
    font-family: var(--font-family-rounded);
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

#score-display .point-unit {
    font-size: 14px;
    margin-left: 2px;
}

#title-display {
    font-size: 12px;
    font-weight: 700;
    color: var(--main-text-color);
    background-color: var(--accent-color);
    padding: 2px 8px;
    border-radius: 10px;
    margin-top: 4px;
}

/* --- Chat Window --- */
#chat-window {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    scroll-behavior: smooth;
}

.message {
    display: flex;
    margin-bottom: 15px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.5s forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message .icon {
    font-size: 36px;
    margin-right: 10px;
    flex-shrink: 0;
}

.message-content {
    padding: 12px 16px;
    border-radius: 18px;
    max-width: 80%;
}

.message.carzy .message-content {
    background-color: var(--carzy-bg-color);
    border-top-left-radius: 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.message.user {
    justify-content: flex-end;
}
.message.user .message-content {
    background-color: var(--user-bg-color);
    border-top-right-radius: 0;
    text-align: right;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

/* --- Options Container --- */
#options-container {
    padding: 15px;
    border-top: 1px solid var(--border-color);
    background-color: #fff;
    flex-shrink: 0;
}

#options-container .option-button {
    display: block;
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.5s forwards;
}

#options-container .option-button.confirm-button {
    background-color: var(--accent-color);
    color: var(--main-text-color);
}

#options-container .option-button:last-child {
    margin-bottom: 0;
}

#options-container .option-button:hover:not(:disabled) {
    background-color: var(--primary-hover-color);
    transform: translateY(-2px);
}

#options-container .option-button.confirm-button:hover:not(:disabled) {
    background-color: #e6a700;
}

#options-container .option-button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

#options-container .option-button.selected {
    background-color: #28a745;
    border: 2px solid #208637;
}

/* --- Point Animation --- */
.point-feedback {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    font-weight: bold;
    color: var(--accent-color);
    background-color: rgba(0,0,0,0.6);
    padding: 10px 20px;
    border-radius: 15px;
    z-index: 100;
    animation: point-up 1.5s ease-out forwards;
    pointer-events: none;
}

@keyframes point-up {
    0% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
    100% { opacity: 0; transform: translate(-50%, -150%) scale(1.2); }
}