:root {
    --bg-main: #0a0a0a;
    --bg-sidebar: #121212;
    --bg-input: #1f1f1f;
    --bg-message-user: #2d2d2d;
    --bg-message-ai: transparent;
    --text-primary: #e0e0e0;
    --text-secondary: #888888;
    --accent: #5e6ad2;
    --accent-hover: #7380ea;
    --border-color: #333333;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-main);
    color: var(--text-primary);
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    width: 100%;
    height: 100%;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}

.logo-circle {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent), #8c5ed2);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 16px;
    color: white;
}

.brand h1 {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 2px;
}

.nav-links {
    flex: 1;
}

.nav-links a {
    display: block;
    color: var(--text-primary);
    text-decoration: none;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 14px;
    transition: background-color 0.2s, color 0.2s;
}

.nav-links a:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-links a.active {
    background-color: rgba(94, 106, 210, 0.15);
    color: var(--accent);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.avatar {
    width: 32px;
    height: 32px;
    background-color: #4a4a4a;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 500;
}

.user-info span {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Main Chat Area */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background-color: var(--bg-main);
}

.chat-header {
    padding: 20px 40px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}

.ai-info h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.ai-info .status {
    font-size: 12px;
    color: var(--accent);
    letter-spacing: 0.5px;
    font-weight: 500;
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 32px;
    scroll-behavior: smooth;
}

/* Scrollbar styles */
.chat-container::-webkit-scrollbar {
    width: 6px;
}

.chat-container::-webkit-scrollbar-track {
    background: transparent;
}

.chat-container::-webkit-scrollbar-thumb {
    background-color: #444;
    border-radius: 3px;
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background-color: #555;
}

.message {
    display: flex;
    gap: 16px;
    max-width: 80%;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

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

.message.user .message-content {
    background-color: var(--bg-message-user);
    border-radius: 12px 12px 0 12px;
    padding: 14px 20px;
    line-height: 1.5;
    font-size: 15px;
}

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

.message.ai .message-content {
    background-color: var(--bg-message-ai);
    border-radius: 12px 12px 12px 0;
    padding: 4px 0;
    line-height: 1.6;
    font-size: 15px;
    color: var(--text-primary);
}

.message.system {
    align-self: center;
    max-width: 100%;
}

.message.system .message-content {
    color: var(--text-secondary);
    font-size: 13px;
    text-align: center;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.message.ai .message-avatar {
    background: linear-gradient(135deg, var(--accent), #8c5ed2);
    color: white;
}

.message.user .message-avatar {
    background-color: #4a4a4a;
}

/* Markdown Styles inside AI Message */
.message-content p {
    margin-bottom: 12px;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content pre {
    background-color: #1a1a1a;
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 16px 0;
    border: 1px solid var(--border-color);
}

.message-content code {
    font-family: monospace;
    background-color: #1a1a1a;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 14px;
}

.message-content pre code {
    background-color: transparent;
    padding: 0;
}

.message-content ul,
.message-content ol {
    margin-left: 24px;
    margin-bottom: 12px;
}

.message-content li {
    margin-bottom: 6px;
}

.message-content h1,
.message-content h2,
.message-content h3 {
    margin-top: 24px;
    margin-bottom: 12px;
    color: #fff;
    font-weight: 600;
}

.message-content h1 {
    font-size: 20px;
}

.message-content h2 {
    font-size: 18px;
}

.message-content h3 {
    font-size: 16px;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 6px;
    padding: 10px 0;
}

.typing-dot {
    width: 6px;
    height: 6px;
    background-color: var(--text-secondary);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-dot:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes typing {

    0%,
    80%,
    100% {
        transform: scale(0);
        opacity: 0.5;
    }

    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Input Area */
.input-area {
    padding: 0 40px 30px;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
}

.input-wrapper {
    position: relative;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: flex-end;
    padding: 12px 16px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-wrapper:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(94, 106, 210, 0.1);
}

textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 15px;
    resize: none;
    padding: 6px 0;
    max-height: 200px;
    outline: none;
    line-height: 1.5;
}

textarea::placeholder {
    color: var(--text-secondary);
}

button[type="submit"] {
    background: var(--accent);
    border: none;
    border-radius: 8px;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s, transform 0.1s;
    margin-left: 12px;
    flex-shrink: 0;
    margin-bottom: 2px;
}

button[type="submit"]:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

button[type="submit"]:active:not(:disabled) {
    transform: scale(0.95);
}

button[type="submit"]:disabled {
    background-color: transparent;
    color: var(--text-secondary);
    cursor: default;
}

.input-footer {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 12px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }

    .chat-container {
        padding: 20px;
    }

    .input-area {
        padding: 0 20px 20px;
    }

    .chat-header {
        padding: 16px 20px;
    }

    .message {
        max-width: 90%;
    }
}

/* テスト変更 */