:root {
    --bg-dark: #09050e;
    --bg-surface: #130822;
    --bg-sidebar: #0f071b;
    --accent-purple: #9333ea;
    --accent-glow: #7e22ce;
    --text-primary: #f3e8ff;
    --text-secondary: #c084fc;
    --border-color: #2b114d;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

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

/* Sidebar Layout */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 16px;
    transition: all 0.3s ease;
    z-index: 10;
}

.sidebar.collapsed {
    width: 70px;
}

.sidebar.collapsed .recent-title,
.sidebar.collapsed .recent-chats-container,
.sidebar.collapsed .mode-selector span,
.sidebar.collapsed .new-chat-btn span,
.sidebar.collapsed .clear-all-btn span {
    display: none;
}

.sidebar-top {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
}

.icon-btn:hover {
    background: var(--bg-surface);
    color: var(--text-primary);
}

.new-chat-btn {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    font-size: 13px;
    transition: 0.2s;
}

.new-chat-btn:hover {
    border-color: var(--accent-purple);
    box-shadow: 0 0 10px rgba(147, 51, 234, 0.3);
}

.mode-selector {
    display: flex;
    gap: 6px;
    margin-bottom: 20px;
    background: var(--bg-dark);
    padding: 4px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.mode-tab {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 8px;
    font-size: 12px;
    font-weight: bold;
    border-radius: 6px;
    cursor: pointer;
    transition: 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.mode-tab.active {
    background: var(--accent-purple);
    color: white;
    box-shadow: 0 0 10px rgba(147, 51, 234, 0.4);
}

.recent-chats-container {
    flex: 1;
    overflow-y: auto;
}

.recent-title {
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 1px;
    display: block;
    margin-bottom: 10px;
}

.chat-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.chat-item {
    padding: 8px 12px;
    font-size: 13px;
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: 0.2s;
}

.chat-item:hover, .chat-item.active {
    background: var(--bg-surface);
    color: var(--accent-purple);
}

.sidebar-footer {
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.clear-all-btn {
    width: 100%;
    background: none;
    border: none;
    color: #ef4444;
    font-size: 12px;
    padding: 8px;
    cursor: pointer;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Main Content Workspace */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background-color: var(--bg-dark);
}

.top-header {
    height: 60px;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.brand-title {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 1px;
}

.glow-text {
    color: var(--accent-purple);
    text-shadow: 0 0 12px rgba(147, 51, 234, 0.8);
}

#code-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

#code-controls select {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--accent-purple);
    padding: 4px 8px;
    border-radius: 6px;
    outline: none;
}

/* Chat Viewport & Watermark Background */
.chat-viewport {
    flex: 1;
    position: relative;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.logo-bg-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    opacity: 0.12;
    z-index: 1;
}

.bg-logo {
    max-width: 400px;
    filter: drop-shadow(0 0 25px rgba(147, 51, 234, 0.9));
}

.chat-messages {
    position: relative;
    z-index: 2;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    padding: 14px 18px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.5;
    max-width: 85%;
    white-space: pre-wrap;
    word-break: break-word;
}

.message.user {
    align-self: flex-end;
    background: var(--accent-purple);
    color: white;
    box-shadow: 0 0 12px rgba(147, 51, 234, 0.3);
}

.message.assistant {
    align-self: flex-start;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.copy-btn {
    display: inline-block;
    margin-top: 8px;
    background: var(--bg-dark);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    cursor: pointer;
}

/* Bottom Input Bar */
.input-container {
    padding: 16px 24px;
    max-width: 850px;
    width: 100%;
    margin: 0 auto;
}

.prompt-box {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 12px 16px;
    display: flex;
    align-items: flex-end;
    gap: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
    transition: 0.2s;
}

.prompt-box:focus-within {
    border-color: var(--accent-purple);
    box-shadow: 0 0 15px rgba(147, 51, 234, 0.25);
}

textarea {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 14px;
    resize: none;
    max-height: 150px;
}

.prompt-actions {
    display: flex;
    gap: 8px;
}

.send-btn, .action-btn {
    background: var(--accent-purple);
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-weight: bold;
}

.action-btn.debug {
    background: #312e81;
    color: #a5b4fc;
    border: 1px solid #6366f1;
}

.disclaimer {
    font-size: 11px;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 8px;
    opacity: 0.7;
}