:root {
    --dark-core: #0a0a0f;
    --dark-surface: #12121a;
    --dark-card: #1c1c27;
    --neon-blue: #00f4ff;
    --soft-text: #d1d1de;
    --bright-text: #ffffff;
    --border-color: #2b2b3d;
    --ai-bubble: #1f2d3d;
}

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

body {
    background-color: var(--dark-core);
    color: var(--soft-text);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.main-header {
    background-color: var(--dark-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area h1 span { color: var(--neon-blue); }
.logo-area p { font-size: 0.85rem; color: #7c7c94; }

#init-ai-btn {
    background-color: var(--neon-blue);
    color: var(--dark-core);
    border: none;
    padding: 8px 16px;
    font-weight: bold;
    border-radius: 4px;
    cursor: pointer;
}

.app-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.sidebar-left {
    width: 260px;
    background-color: var(--dark-surface);
    border-right: 1px solid var(--border-color);
    padding: 20px;
}

.nav-btn {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--soft-text);
    padding: 12px 15px;
    text-align: left;
    cursor: pointer;
    border-radius: 6px;
    margin-bottom: 8px;
}

.nav-btn.active, .nav-btn:hover {
    background-color: var(--dark-card);
    color: var(--neon-blue);
    border-left: 3px solid var(--neon-blue);
}

.main-content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.tech-section { display: none; }
.tech-section.active { display: block; }

.card {
    background-color: var(--dark-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-top: 15px;
}

.code-wrapper { position: relative; }

pre {
    background-color: #07070a;
    padding: 18px;
    border-radius: 6px;
    overflow-x: auto;
    font-family: monospace;
    color: #b5cea8;
}

.btn-copy {
    position: absolute;
    top: 12px;
    right: 12px;
    background-color: var(--dark-card);
    border: 1px solid var(--border-color);
    color: var(--soft-text);
    padding: 5px 12px;
    border-radius: 4px;
    cursor: pointer;
}

.sidebar-right {
    width: 350px;
    background-color: var(--dark-surface);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.chat-box {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.msg { padding: 10px 14px; border-radius: 8px; font-size: 0.9rem; max-width: 85%; word-break: break-word;}
.system-msg { background-color: var(--dark-card); align-self: center; text-align: center; font-size: 0.8rem; }
.user-msg { background-color: var(--border-color); align-self: flex-end; }
.ai-msg { background-color: var(--ai-bubble); align-self: flex-start; }

.chat-input-area { padding: 15px; border-top: 1px solid var(--border-color); display: flex; flex-direction: column; gap: 10px; }
.chat-input-area textarea { background-color: var(--dark-core); border: 1px solid var(--border-color); border-radius: 6px; padding: 10px; color: #fff; resize: none; }

#send-btn { background-color: #2b2b3d; color: #666; border: none; padding: 10px; border-radius: 6px; font-weight: bold; cursor: not-allowed; }
#send-btn.ready { background-color: var(--neon-blue); color: var(--dark-core); cursor: pointer; }