:root {
    --primary: #9d00ff;
    --primary-glow: rgba(157, 0, 255, 0.4);
    --bg-dark: #0a0a0c;
    --glass-bg: rgba(20, 20, 25, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #e2e2e2;
}

html, body { 
    margin: 0; padding: 0; 
    width: 100vw; height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; 
    color: var(--text-main); 
    background-color: var(--bg-dark); 
    display: flex; justify-content: center; align-items: center;
    overflow: hidden; /* Prevents app scrolling, feels native */
}

.app-container {
    width: 100%; height: 100%; max-width: 800px;
    padding: 15px; box-sizing: border-box;
    display: flex; flex-direction: column;
}

.janith-gpt-3d-glass {
    flex-grow: 1; display: flex; flex-direction: column;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 15px; padding: 15px;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.5), 0 0 15px var(--primary-glow);
}

.chat-header {
    text-align: center; border-bottom: 1px solid var(--glass-border);
    padding-bottom: 10px; margin-bottom: 10px;
}

.chat-header h3 { margin: 0; font-size: 1.5rem; color: #fff; text-shadow: 0 0 10px var(--primary); }

.glass-chat-history {
    flex-grow: 1; overflow-y: auto; padding: 15px;
    background: rgba(0,0,0,0.4); border-radius: 10px; margin-bottom: 10px;
    border: 1px inset var(--glass-border);
    display: flex; flex-direction: column; gap: 12px;
    line-height: 1.5; font-size: 0.95rem;
}

.chat-input-area { display: flex; gap: 10px; height: 45px;}

.glass-chat-input {
    flex-grow: 1; background: rgba(0, 0, 0, 0.6); border: 1px solid var(--glass-border);
    color: #fff; padding: 0 15px; border-radius: 8px; outline: none; font-size: 1rem;
}
.glass-chat-input:focus { border-color: var(--primary); box-shadow: 0 0 10px var(--primary-glow); }

.glass-btn {
    background: var(--primary); color: #fff; border: none;
    border-radius: 8px; padding: 0 25px; font-weight: bold; font-size: 1rem; cursor: pointer;
    transition: 0.3s;
}
.glass-btn:hover { background: #b033ff; box-shadow: 0 0 15px var(--primary-glow); }