:root {
    --bg-color: #000000;
    --fg-color: #ffffff;
    --border-color: #333333;
    --font-ui: system-ui, -apple-system, sans-serif;
    --font-mono: monospace;
}

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

body {
    background-color: var(--bg-color);
    color: var(--fg-color);
    font-family: var(--font-ui);
    overflow: hidden;
}

.layout {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
.sidebar {
    width: 250px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h2 {
    font-size: 1.2rem;
    letter-spacing: 2px;
}

.history-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.history-item {
    padding: 10px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    border-bottom: 1px solid #1a1a1a;
}
.history-item:hover, .history-item.current {
    background-color: #111;
}

/* Chat Area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

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

.message {
    max-width: 80%;
    font-family: var(--font-mono);
    line-height: 1.5;
    white-space: pre-wrap;
}

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

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

.input-area {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

textarea {
    flex: 1;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--fg-color);
    font-family: var(--font-mono);
    padding: 10px;
    resize: none;
    outline: none;
}
textarea:focus {
    border-color: var(--fg-color);
}

button {
    background: transparent;
    color: var(--fg-color);
    border: 1px solid var(--border-color);
    padding: 10px 15px;
    font-family: var(--font-ui);
    cursor: pointer;
    text-transform: uppercase;
    font-weight: bold;
}
button:hover {
    background: var(--fg-color);
    color: var(--bg-color);
}

/* Image Panel */
.image-panel {
    width: 300px;
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease, padding 0.3s ease;
}

.image-panel.collapsed {
    width: 0;
    border-left: none;
    overflow: hidden;
}

.image-panel-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    white-space: nowrap;
}

.image-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.image-result {
    margin-top: 20px;
    width: 100%;
    min-height: 200px;
    border: 1px dashed var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: #666;
    text-align: center;
}
.image-result img {
    max-width: 100%;
    display: block;
}