:root {
    --bg-deep: #0a0a0c;
    --bg-surface: #141418;
    --bg-card: #1c1c22;
    --accent-primary: #7c4dff;
    --accent-secondary: #00e5ff;
    --text-main: #f0f0f5;
    --text-muted: #9494b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --glow-shadow: 0 0 20px rgba(124, 77, 255, 0.3);
    --font-display: 'Syncopate', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
}

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

body {
    background-color: var(--bg-deep);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Typography Helpers */
h1, h2, h3 {
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Layout Elements */
.app-container {
    display: grid;
    grid-template-columns: 320px 1fr;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
.sidebar {
    background: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 2rem;
    z-index: 10;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 3rem;
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.nav-item {
    padding: 0.75rem 1rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-muted);
    text-decoration: none;
}

.nav-item:hover, .nav-item.active {
    background: rgba(124, 77, 255, 0.1);
    color: var(--text-main);
    box-shadow: inset 0 0 10px rgba(124, 77, 255, 0.05);
}

/* Main Content */
.main-viewport {
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: radial-gradient(circle at top right, rgba(124, 77, 255, 0.05), transparent 40%),
                radial-gradient(circle at bottom left, rgba(0, 229, 255, 0.03), transparent 40%);
}

.chat-header {
    padding: 1.5rem 2.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(10px);
    background: rgba(10, 10, 12, 0.8);
}

.ai-status {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-secondary);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-secondary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0.5; }
    100% { transform: scale(1); opacity: 1; }
}

/* Chat Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    scroll-behavior: smooth;
}

.message-wrapper {
    max-width: 80%;
    animation: fadeInUp 0.5s ease forwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.message-content {
    padding: 1.25rem 1.5rem;
    border-radius: 20px;
    position: relative;
}

.user .message-content {
    background: var(--accent-primary);
    color: white;
    border-bottom-right-radius: 4px;
}

.ai .message-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
}

.timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    display: block;
}

/* Input Area */
.input-section {
    padding: 2.5rem;
    background: linear-gradient(to top, var(--bg-deep), transparent);
}

.input-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    display: flex;
    align-items: center;
    padding: 0.5rem 1.5rem;
    gap: 1rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: border-color 0.3s ease;
}

.input-container:focus-within {
    border-color: var(--accent-primary);
}

input {
    background: transparent;
    border: none;
    color: var(--text-main);
    flex: 1;
    padding: 1rem 0;
    font-family: inherit;
    font-size: 1rem;
    outline: none;
}

.action-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.3s ease;
}

.action-btn:hover {
    color: var(--accent-secondary);
}

.send-btn {
    background: var(--accent-primary);
    color: white;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}

.send-btn:hover {
    transform: scale(1.05);
}

/* Visual Flourish */
.orb-visualizer {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
    opacity: 0.05;
    filter: blur(40px);
    pointer-events: none;
    z-index: 0;
}

/* Tamil Support */
.lang-tamil {
    font-family: 'Mukta Malar', sans-serif;
    line-height: 1.8;
}

/* Cards & Badges */
.mood-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    background: rgba(0, 229, 255, 0.1);
    color: var(--accent-secondary);
    border: 1px solid rgba(0, 229, 255, 0.2);
}

.placeholder-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    flex-shrink: 0;
}

.ai-avatar {
    background: url('https://images.unsplash.com/photo-1620641788421-7a1c342ea42e?q=80&w=100&auto=format&fit=crop') center/cover;
}

.avatar-small {
    width: 32px;
    height: 32px;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.header-title {
    font-size: 0.9rem;
    margin: 0;
}

.status-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.footer-disclaimer {
    text-align: center;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 1rem;
}