/* ============================================
   NeuralQuery — Premium Dark Glassmorphic UI
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
    /* Colors */
    --bg-primary: #0a0a1a;
    --bg-secondary: #0f0f2e;
    --bg-tertiary: #161638;

    --glass-bg: rgba(22, 22, 56, 0.6);
    --glass-border: rgba(129, 140, 248, 0.15);
    --glass-hover: rgba(129, 140, 248, 0.08);

    --text-primary: #e8e8f0;
    --text-secondary: #9d9db8;
    --text-muted: #6b6b8a;

    --accent-indigo: #818cf8;
    --accent-purple: #c084fc;
    --accent-violet: #a78bfa;
    --accent-pink: #f472b6;
    --accent-cyan: #67e8f9;

    --gradient-primary: linear-gradient(135deg, #818cf8 0%, #c084fc 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(129, 140, 248, 0.1) 0%, rgba(192, 132, 252, 0.1) 100%);
    --gradient-user-msg: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);

    --success: #34d399;
    --error: #f87171;
    --warning: #fbbf24;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(129, 140, 248, 0.15);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

/* ---------- App Container ---------- */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100%;
    position: relative;
    overflow: hidden;
}

/* ---------- Animated Background ---------- */
.bg-gradient {
    position: fixed;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 60% at 50% 0%, rgba(129, 140, 248, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 100%, rgba(192, 132, 252, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse 50% 50% at 10% 60%, rgba(103, 232, 249, 0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.bg-grid {
    position: fixed;
    inset: 0;
    background-image: 
        linear-gradient(rgba(129, 140, 248, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(129, 140, 248, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

.floating-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: rgba(129, 140, 248, 0.07);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: rgba(192, 132, 252, 0.05);
    bottom: -50px;
    left: -50px;
    animation-delay: -7s;
}

.orb-3 {
    width: 250px;
    height: 250px;
    background: rgba(103, 232, 249, 0.04);
    top: 40%;
    left: 60%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -40px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(15px, 30px) scale(1.02); }
}

/* ---------- Header ---------- */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-xl);
    background: rgba(10, 10, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    position: relative;
    z-index: 10;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--gradient-subtle);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
}

.logo-text h1 {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.logo-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 500;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.stats-badge {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 6px 14px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.stats-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.4); }
    50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(52, 211, 153, 0); }
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-icon:hover {
    background: var(--glass-hover);
    color: var(--text-primary);
    border-color: var(--accent-indigo);
}

/* ---------- Chat Container ---------- */
.chat-container {
    flex: 1;
    overflow-y: auto;
    position: relative;
    z-index: 1;
    scroll-behavior: smooth;
}

.chat-messages {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    min-height: 100%;
}

/* ---------- Welcome Screen ---------- */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    flex: 1;
    animation: fadeIn 0.6s ease;
}

.welcome-icon {
    margin-bottom: var(--space-lg);
    animation: pulseIcon 3s ease-in-out infinite;
}

@keyframes pulseIcon {
    0%, 100% { transform: scale(1); opacity: 0.9; }
    50% { transform: scale(1.05); opacity: 1; }
}

.welcome-screen h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-screen p {
    color: var(--text-secondary);
    max-width: 480px;
    margin-bottom: var(--space-xl);
    font-size: 0.95rem;
    line-height: 1.7;
}

.suggestion-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    max-width: 600px;
}

.chip {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 10px 16px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.chip:hover {
    background: var(--glass-hover);
    border-color: var(--accent-indigo);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* ---------- Message Bubbles ---------- */
.message {
    display: flex;
    gap: var(--space-md);
    animation: slideUp 0.3s ease;
    max-width: 100%;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.message.user {
    justify-content: flex-end;
}

.message.assistant {
    justify-content: flex-start;
}

.message-avatar {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
}

.message.user .message-avatar {
    background: var(--gradient-user-msg);
    color: white;
    order: 2;
}

.message.assistant .message-avatar {
    background: var(--gradient-subtle);
    border: 1px solid var(--glass-border);
    color: var(--accent-indigo);
}

.message-content {
    max-width: 85%;
    min-width: 0;
}

.message.user .message-content {
    order: 1;
}

.message-bubble {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    line-height: 1.7;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.message.user .message-bubble {
    background: var(--gradient-user-msg);
    color: white;
    border-bottom-right-radius: var(--space-xs);
}

.message.assistant .message-bubble {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    border-bottom-left-radius: var(--space-xs);
}

/* ---------- Message Content Formatting ---------- */
.message.assistant .message-bubble h1,
.message.assistant .message-bubble h2,
.message.assistant .message-bubble h3 {
    margin-top: var(--space-md);
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.message.assistant .message-bubble h1 { font-size: 1.15rem; }
.message.assistant .message-bubble h2 { font-size: 1.05rem; }
.message.assistant .message-bubble h3 { font-size: 0.95rem; color: var(--accent-violet); }

.message.assistant .message-bubble p {
    margin-bottom: var(--space-sm);
}

.message.assistant .message-bubble ul,
.message.assistant .message-bubble ol {
    margin: var(--space-sm) 0;
    padding-left: var(--space-lg);
}

.message.assistant .message-bubble li {
    margin-bottom: var(--space-xs);
}

.message.assistant .message-bubble strong {
    color: var(--accent-violet);
    font-weight: 600;
}

.message.assistant .message-bubble code {
    background: rgba(129, 140, 248, 0.1);
    color: var(--accent-cyan);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
}

.message.assistant .message-bubble pre {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: var(--space-md);
    margin: var(--space-sm) 0;
    overflow-x: auto;
    position: relative;
}

.message.assistant .message-bubble pre code {
    background: transparent;
    color: var(--text-primary);
    padding: 0;
    font-size: 0.82rem;
    line-height: 1.6;
}

.message.assistant .message-bubble blockquote {
    border-left: 3px solid var(--accent-indigo);
    padding-left: var(--space-md);
    margin: var(--space-sm) 0;
    color: var(--text-secondary);
    font-style: italic;
}

/* ---------- Sources ---------- */
.sources-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-top: var(--space-md);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--glass-border);
}

.sources-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    width: 100%;
    margin-bottom: var(--space-xs);
    font-weight: 600;
}

.source-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: rgba(129, 140, 248, 0.08);
    border: 1px solid rgba(129, 140, 248, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    color: var(--accent-indigo);
    transition: all var(--transition-fast);
}

.source-badge:hover {
    background: rgba(129, 140, 248, 0.15);
    border-color: var(--accent-indigo);
}

.source-relevance {
    font-size: 0.65rem;
    color: var(--text-muted);
}

/* ---------- Typing Indicator ---------- */
.typing-indicator {
    display: flex;
    gap: var(--space-md);
    animation: slideUp 0.3s ease;
}

.typing-dots {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: var(--space-md) var(--space-lg);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    border-bottom-left-radius: var(--space-xs);
    backdrop-filter: blur(10px);
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-indigo);
    animation: bounce 1.4s ease-in-out infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-8px); opacity: 1; }
}

/* ---------- Input Area ---------- */
.input-area {
    padding: var(--space-md) var(--space-xl) var(--space-lg);
    background: rgba(10, 10, 26, 0.9);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    position: relative;
    z-index: 10;
}

.input-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    display: flex;
    align-items: flex-end;
    gap: var(--space-sm);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-sm);
    transition: all var(--transition-base);
}

.input-container:focus-within {
    border-color: var(--accent-indigo);
    box-shadow: var(--shadow-glow);
}

.input-glow {
    position: absolute;
    inset: -1px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    opacity: 0;
    z-index: -1;
    transition: opacity var(--transition-base);
    filter: blur(8px);
}

.input-container:focus-within .input-glow {
    opacity: 0.15;
}

textarea#messageInput {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    line-height: 1.6;
    padding: var(--space-sm) var(--space-md);
    resize: none;
    max-height: 150px;
    min-height: 24px;
}

textarea#messageInput::placeholder {
    color: var(--text-muted);
}

.send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(129, 140, 248, 0.4);
}

.send-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.send-btn:active:not(:disabled) {
    transform: scale(0.95);
}

.input-hint {
    text-align: center;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: var(--space-sm);
}

.input-hint kbd {
    display: inline-block;
    padding: 1px 6px;
    background: rgba(129, 140, 248, 0.1);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
}

/* ---------- Scrollbar ---------- */
.chat-container::-webkit-scrollbar {
    width: 6px;
}

.chat-container::-webkit-scrollbar-track {
    background: transparent;
}

.chat-container::-webkit-scrollbar-thumb {
    background: rgba(129, 140, 248, 0.2);
    border-radius: 3px;
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background: rgba(129, 140, 248, 0.4);
}

/* ---------- Error Message ---------- */
.error-bubble {
    background: rgba(248, 113, 113, 0.1) !important;
    border-color: rgba(248, 113, 113, 0.3) !important;
    color: var(--error) !important;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .header {
        padding: var(--space-sm) var(--space-md);
    }

    .logo-text h1 {
        font-size: 1.1rem;
    }

    .logo-subtitle {
        display: none;
    }

    .chat-messages {
        padding: var(--space-md) var(--space-sm);
    }

    .input-area {
        padding: var(--space-sm) var(--space-md) var(--space-md);
    }

    .suggestion-chips {
        flex-direction: column;
        align-items: center;
    }

    .chip {
        font-size: 0.75rem;
    }

    .message-content {
        max-width: 90%;
    }

    .welcome-screen h2 {
        font-size: 1.4rem;
    }

    .floating-orb {
        display: none;
    }
}

@media (max-width: 480px) {
    .stats-badge span {
        display: none;
    }

    .message-avatar {
        width: 30px;
        height: 30px;
        font-size: 0.75rem;
    }

    .message-bubble {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.85rem;
    }
}