:root {
    --bg-main: #212121;
    --bg-sidebar: #171717;
    --bg-input: #2f2f2f;
    --text-primary: #ececf1;
    --text-secondary: #b4b4b4;
    --border-color: #2f2f2f;
    --accent-color: #10b981;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    overflow: hidden;
}

.app-wrapper {
    display: flex;
    height: 100vh;
}

/* Sidebar styling */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    padding: 12px;
    border-right: 1px solid var(--border-color);
}

.btn-new-chat {
    width: 100%;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    border-radius: 6px;
    text-align: left;
    font-weight: 500;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.2s;
}

.btn-new-chat:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.sidebar-menu {
    flex: 1;
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.history-item:hover, .history-item.active {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.history-title {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 8px;
}

.btn-delete-chat {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.2s, color 0.2s;
}

.history-item:hover .btn-delete-chat {
    opacity: 1;
}

.btn-delete-chat:hover {
    color: #ef4444;
    background-color: rgba(255, 255, 255, 0.08);
}

.sidebar-footer {
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.btn-admin-link {
    display: block;
    text-align: center;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    padding: 8px;
    border-radius: 4px;
}

.btn-admin-link:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

/* Main workspace */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.chat-header-bar {
    height: 52px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 20px;
    background-color: var(--bg-main);
}

.model-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 15px;
}

.version-tag {
    font-size: 11px;
    color: var(--text-secondary);
    background: #2f2f2f;
    padding: 2px 6px;
    border-radius: 4px;
}

.chat-viewport {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    padding: 40px 0;
}

.welcome-container {
    margin: auto;
    text-align: center;
    max-width: 400px;
}

.circle-logo {
    width: 60px;
    height: 60px;
    background-color: var(--text-primary);
    color: var(--bg-main);
    font-size: 24px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px auto;
}

.welcome-container h1 {
    font-size: 24px;
    font-weight: 600;
}

/* Chat thread */
.chat-thread {
    max-width: 760px;
    width: 100%;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.message {
    display: flex;
    flex-direction: column;
    max-width: 85%;
}

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

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

.message .bubble {
    padding: 12px 18px;
    border-radius: 18px;
    font-size: 15px;
    line-height: 1.5;
}

.message.user .bubble {
    background-color: var(--bg-input);
    color: var(--text-primary);
    border-bottom-right-radius: 4px;
}

.message.assistant .bubble {
    background-color: transparent;
    color: var(--text-primary);
    padding-left: 0;
}

.message.blocked .bubble {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid #ef4444;
    color: #fca5a5;
    border-radius: 8px;
    padding-left: 18px;
}

/* Bottom input */
.chat-footer-input {
    padding: 16px 20px 24px 20px;
    background-color: var(--bg-main);
}

.input-pill {
    max-width: 760px;
    width: 100%;
    margin: 0 auto;
    background-color: var(--bg-input);
    border-radius: 24px;
    display: flex;
    align-items: center;
    padding: 8px 12px 8px 20px;
    border: 1px solid var(--border-color);
}

.input-pill textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 15px;
    outline: none;
    font-family: inherit;
    resize: none;
    max-height: 200px;
    overflow-y: hidden; /* Hide scrollbars by default to prevent arrow spinner on refresh */
    padding: 6px 0;
    line-height: 1.4;
    height: 22px;
}

.btn-send {
    background-color: var(--text-primary);
    color: var(--bg-main);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn-send:hover {
    opacity: 0.9;
}

.disclaimer-text {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 10px;
}

/* Markdown & Text Formatting Styles */
.bubble h1, .bubble h2, .bubble h3, .bubble h4, .bubble h5, .bubble h6 {
    margin: 16px 0 8px 0;
    color: var(--text-primary);
    font-weight: 600;
}
.bubble h1 { font-size: 20px; }
.bubble h2 { font-size: 18px; }
.bubble h3 { font-size: 16px; border-bottom: 1px solid var(--border-color); padding-bottom: 4px; }

.bubble p {
    margin-bottom: 12px;
}

.bubble ul, .bubble ol {
    margin: 8px 0 12px 24px;
}

.bubble li {
    margin-bottom: 4px;
}

.bubble blockquote {
    border-left: 4px solid var(--accent-color);
    padding: 4px 12px;
    margin: 12px 0;
    color: var(--text-secondary);
    background-color: rgba(255, 255, 255, 0.02);
}

/* Code block container */
.bubble pre {
    background-color: #1a1a1a;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
    margin: 14px 0;
    overflow-x: auto;
}

/* Inline code formatting */
.bubble :not(pre) > code {
    background-color: rgba(255, 255, 255, 0.08);
    color: #fca5a5;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 13px;
}

.bubble pre code {
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 13.5px;
    line-height: 1.5;
    background: transparent;
    padding: 0;
    border-radius: 0;
}

/* Tables styling */
.bubble table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}

.bubble th, .bubble td {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.bubble th {
    background-color: rgba(255, 255, 255, 0.04);
    font-weight: 600;
}

.bubble a {
    color: var(--accent-color);
    text-decoration: underline;
}

@media (max-width: 768px) {
    .app-wrapper {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 10px;
    }
    .sidebar-menu {
        display: none; /* Collapses session list on mobile */
    }
    .btn-new-chat {
        display: none;
    }
    .sidebar-footer {
        border-top: none;
        padding-top: 0;
        display: flex;
        justify-content: center;
        width: 100%;
    }
    .btn-admin-link {
        padding: 6px 12px;
        width: 100%;
        font-size: 12px;
    }
    .chat-main {
        height: calc(100vh - 60px);
    }
    .chat-header-bar {
        height: 40px;
        padding: 0 15px;
    }
    .chat-viewport {
        padding: 10px 12px;
    }
    .bubble {
        font-size: 14px !important;
        padding: 10px 14px !important;
    }
    .chat-footer-input {
        padding: 10px 12px 16px 12px;
    }
    .input-pill {
        padding: 6px 10px 6px 16px;
    }
}