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

:root {
    --bg-primary: #1e1e1e;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #e3e3e3;
    --text-secondary: #a0a0a0;
    --accent-color: #d4866f;
    --border-color: #404040;
    --input-bg: #2a2a2a;
    --hover-bg: #363636;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    border-bottom: 1px solid var(--border-color);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo svg {
    color: var(--text-primary);
}

.icon-button {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.icon-button:hover {
    background-color: var(--hover-bg);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 40px 24px 24px;
    display: flex;
    flex-direction: column;
    width: 100%;
}

/* Welcome Message */
.welcome-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: auto;
    text-align: center;
    gap: 16px;
}

.welcome-icon {
    color: var(--accent-color);
}

.welcome-title {
    font-size: 32px;
    font-weight: 400;
    color: var(--text-primary);
}

/* Message Bubbles */
.message {
    margin-bottom: 24px;
    width: 100%;
}

.message-user {
    display: flex;
    justify-content: flex-end;
}

.message-user .message-content {
    background-color: var(--bg-secondary);
    padding: 12px 16px;
    border-radius: 18px;
    max-width: 75%;
}

.message-assistant {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
}

.message-assistant .message-content {
    line-height: 1.6;
    color: var(--text-primary);
    max-width: 75%;
    font-size: 15px;
}

.message-assistant .message-content p {
    margin-bottom: 16px;
    font-size: 15px;
}

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

.message-assistant .message-content ol {
    margin: 16px 0;
    padding-left: 28px;
    list-style-type: decimal;
}

.message-assistant .message-content li {
    margin-bottom: 16px;
    padding-left: 8px;
    line-height: 1.7;
    font-size: 15px;
    color: var(--text-primary);
}

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

/* Style headings/titles within list items - make them larger and more prominent */
.message-assistant .message-content li strong {
    font-weight: 600;
    font-size: 17px;
    color: var(--text-primary);
    display: block;
    margin-bottom: 6px;
    letter-spacing: 0.01em;
}

/* Style description text within list items - slightly smaller and lighter */
.message-assistant .message-content li .list-description {
    font-size: 14px;
    color: var(--text-secondary);
    display: block;
    line-height: 1.6;
    margin-top: 2px;
}

/* Style bold text in paragraphs (general emphasis) - not in lists */
.message-assistant .message-content p strong {
    font-weight: 600;
    font-size: 15px;
    color: var(--text-primary);
}

.message-loading {
    display: flex;
    gap: 6px;
    padding: 12px 0;
    max-width: 75%;
}

.loading-dot {
    width: 8px;
    height: 8px;
    background-color: var(--text-secondary);
    border-radius: 50%;
    animation: loading 1.4s infinite ease-in-out;
}

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

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

@keyframes loading {
    0%, 80%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    40% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Input Container */
.input-container {
    padding: 16px 24px 24px;
    border-top: 1px solid var(--border-color);
    width: 100%;
}

.input-wrapper {
    width: 100%;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 22px;
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.input-controls {
    display: flex;
    gap: 8px;
}

.control-button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.control-button:hover {
    background-color: var(--hover-bg);
    color: var(--text-primary);
}

.chat-input {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    resize: none;
    outline: none;
    width: 100%;
    min-height: 24px;
    max-height: 200px;
    line-height: 1.5;
}

.chat-input::placeholder {
    color: var(--text-secondary);
}

.input-actions {
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

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

.send-button:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.send-button:active {
    transform: translateY(0);
}

.send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Scrollbar */
.chat-container::-webkit-scrollbar {
    width: 8px;
}

.chat-container::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

.chat-container::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background: var(--border-color);
}

/* Responsive */
@media (max-width: 768px) {
    .chat-container {
        padding: 20px 16px 16px;
    }

    .input-container {
        padding: 12px 16px 16px;
    }

    .welcome-title {
        font-size: 24px;
    }
}