/* ==========================================================================
   Chat Assistant Styles
   ========================================================================== */

/* CSS Variables */
:root {
    /* Primary Colors */
    --color-primary: #003d5c;
    --color-primary-dark: #002a3d;
    --color-accent: #ff6b6b;
    --color-accent-hover: #ff5252;
    
    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f0f0f0;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-900: #111827;
    
    /* Scroll Button */
    --color-scroll-btn: #ffbf00;
    --color-scroll-btn-icon: #1f3a56;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Typography */
    --font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;
}

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

html, body {
    height: 100%;
    overflow: hidden;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-gray-900);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Main Container
   ========================================================================== */

.chat-container {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    max-width: 100%;
    background-color: var(--color-white);
}

/* ==========================================================================
   Header
   ========================================================================== */

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-primary);
    color: var(--color-white);
    flex-shrink: 0;
    z-index: 100;
    box-shadow: 1px 0px 0px 1px;
}

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

.header-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    line-height: 1;
}

.header-icon .dx-icon {
    font-size: 20px;
    color: var(--color-white);
    line-height: 1;
    display: block;
}

.header-title {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    line-height: 1;
}

/* Header Right — Hamburger Menu */

.header-right {
    position: relative;
}

.menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--color-white);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: background-color 0.15s ease;
}

.menu-btn:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.menu-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 180px;
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-gray-200);
    padding: 6px 0;
    z-index: 200;
}

.menu-dropdown a {
    display: block;
    padding: 10px 16px;
    color: var(--color-gray-900);
    text-decoration: none;
    font-size: 0.875rem;
    transition: background-color 0.1s ease;
}

.menu-dropdown a:hover {
    background-color: var(--color-gray-100);
}

.menu-divider {
    height: 1px;
    background-color: var(--color-gray-200);
    margin: 6px 0;
}

/* ==========================================================================
   Chat Messages Area
   ========================================================================== */

.chat-messages {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    overscroll-behavior-y: none;
    -webkit-overflow-scrolling: touch;
}

/* Message Bubbles */
.message {
    display: flex;
    animation: messageSlide 0.3s ease-out;
}

@keyframes messageSlide {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

.message-bubble {
    max-width: 80%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    word-wrap: break-word;
}

.message-ai .message-bubble {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-bottom-left-radius: var(--spacing-xs);
}

.message-user .message-bubble {
    background-color: var(--color-gray-100);
    color: var(--color-gray-900);
    border-bottom-right-radius: var(--spacing-xs);
}

/* Message Content */
.message-bubble p {
    margin: 0;
}

.message-bubble ul,
.message-bubble ol {
    margin-top: var(--spacing-sm);
    padding-left: 0;
    list-style: none;
}

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

.message-bubble li::before {
    margin-right: var(--spacing-sm);
}

.message-bullets li::before {
    content: '•';
}

.message-list li {
    counter-increment: item;
}

.message-list li::before {
    content: counter(item) '.';
}

.message-list {
    counter-reset: item;
}

.markdown-content {
    line-height: 1.6;
}

.markdown-content p {
    margin: 0 0 0.5rem 0;
}

.markdown-content p:last-child {
    margin-bottom: 0;
}

.markdown-content ul,
.markdown-content ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
    list-style: revert;
}

.markdown-content li {
    margin-bottom: 0.25rem;
}

.markdown-content li::before {
    content: none;
}

.markdown-content strong {
    font-weight: 600;
}

.markdown-content em {
    font-style: italic;
}

.markdown-content code {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
    font-family: monospace;
    font-size: 0.9em;
}

.markdown-content pre {
    background-color: rgba(0, 0, 0, 0.3);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 0.5rem 0;
}

.markdown-content pre code {
    background: none;
    padding: 0;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3 {
    margin: 0.75rem 0 0.5rem 0;
    font-weight: 600;
}

.markdown-content h1:first-child,
.markdown-content h2:first-child,
.markdown-content h3:first-child {
    margin-top: 0;
}

.markdown-content a {
    color: inherit;
    text-decoration: underline;
}

.typing-dots {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 2px 0;
}

.typing-dots .typing-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-white);
    border-radius: 50%;
    opacity: 0.6;
    animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-dots .typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dots .typing-dot:nth-child(2) { animation-delay: -0.16s; }
.typing-dots .typing-dot:nth-child(3) { animation-delay: 0s; }

/* Typing Indicator */
.typing-indicator {
    display: flex;
    justify-content: flex-start;
}

.typing-bubble {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0.75rem 1rem;
    background-color: var(--color-primary);
    border-radius: var(--radius-lg);
    border-bottom-left-radius: var(--spacing-xs);
}

.typing-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-white);
    border-radius: 50%;
    opacity: 0.6;
    animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-dot:nth-child(2) {
    animation-delay: -0.16s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0s;
}

@keyframes typingBounce {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Skeleton Loading for Messages */
.message-skeleton {
    display: flex;
    justify-content: flex-start;
}

.skeleton-bubble {
    padding: 0.75rem 1rem;
    background-color: var(--color-primary);
    border-radius: var(--radius-lg);
    border-bottom-left-radius: var(--spacing-xs);
    min-width: 200px;
}

.skeleton-line {
    height: 14px;
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.1) 25%,
        rgba(255, 255, 255, 0.3) 50%,
        rgba(255, 255, 255, 0.1) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
    margin-bottom: 8px;
}

.skeleton-line:last-child {
    margin-bottom: 0;
    width: 60%;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ==========================================================================
   Suggestion Chips (inline in chat)
   ========================================================================== */

.suggestion-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    animation: fadeIn 0.3s ease-out;
    transition: opacity 0.3s ease, height 0.3s ease;
}

.suggestion-chips.dismissing {
    opacity: 0;
    height: 0 !important;
    overflow: hidden;
}

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

.chip {
    -webkit-tap-highlight-color: transparent;
    padding: 0.625rem 1rem;
    background-color: var(--color-white);
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-full);
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.chip.selected {
    background-color: var(--color-accent);
    color: var(--color-white);
}

.chip:hover {
    background-color: var(--color-accent);
    color: var(--color-white);
}

.chip:active {
    transform: scale(0.98);
}

/* ==========================================================================
   AFS Ad — Inside Message Bubble
   ========================================================================== */

.ad-container {
    margin: 0 -1rem -0.75rem;
    padding: 0;
    overflow: hidden;
    border-bottom-left-radius: var(--spacing-xs);
    border-bottom-right-radius: var(--radius-lg);
}

.markdown-content.has-ad {
    margin-bottom: -1rem;
    position: relative;
}

.ad-container.ad-loading {
    position: absolute;
    visibility: hidden;
    width: 100%;
    pointer-events: none;
    margin: 0;
    padding: 0;
    border: none;
}

.afs-bubble-container {
    min-height: 20px;
}

/* ==========================================================================
   Scroll-Down Button
   ========================================================================== */

.scroll-down-anchor {
    position: relative;
    height: 0;
    z-index: 60;
    flex-shrink: 0;
    pointer-events: none;
}

.scroll-down-btn {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background-color: var(--color-scroll-btn);
    color: var(--color-scroll-btn-icon);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgb(0 0 0 / 0.2);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
    -webkit-tap-highlight-color: transparent;
    pointer-events: auto;
}

.scroll-down-btn:hover {
    transform: translateX(-50%) scale(1.08);
    box-shadow: 0 4px 12px rgb(0 0 0 / 0.25);
}

.scroll-down-btn:active {
    transform: translateX(-50%) scale(0.95);
}

.scroll-down-btn.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateX(-50%) translateY(8px);
}

/* ==========================================================================
   Rewarded Footer
   ========================================================================== */

.rewarded-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem var(--spacing-lg);
    background-color: var(--color-gray-100);
    border-top: 1px solid var(--color-gray-200);
    flex-shrink: 0;
}

.chats-remaining {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray-700);
    font-size: 0.875rem;
}

.chats-remaining svg {
    flex-shrink: 0;
}

/* ==========================================================================
   Chat Input
   ========================================================================== */

.chat-input-container {
    padding: 0.75rem var(--spacing-lg);
    background-color: var(--color-white);
    border-top: 1px solid var(--color-gray-200);
    flex-shrink: 0;
    padding-bottom: env(safe-area-inset-bottom, 0.75rem)
}

.chat-input-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-full);
    padding: 0 0.75rem 0 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    cursor: text;
}

.chat-input-wrapper:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 61, 92, 0.1);
}

.chat-input {
    flex: 1;
    border: none;
    background: transparent;
    font-family: var(--font-family);
    font-size: 1rem;
    color: var(--color-gray-900);
    outline: none;
    padding: 1rem 0;
}

.chat-input::placeholder {
    color: var(--color-gray-500);
}

.send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    color: var(--color-primary);
    cursor: pointer;
    border-radius: 50%;
    transition: opacity var(--transition-fast), background-color var(--transition-fast);
}

.send-btn:hover:not(:disabled) {
    background-color: rgba(0, 61, 92, 0.1);
}

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

/* ==========================================================================
   Loading Overlay
   ========================================================================== */

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    background-color: var(--color-white);
    z-index: 1000;
    transition: opacity var(--transition-slow);
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-overlay p {
    color: var(--color-gray-600);
    font-size: 0.875rem;
}

/* ==========================================================================
   Error State
   ========================================================================== */

.error-state {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-white);
    z-index: 1000;
}

.error-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl);
    max-width: 320px;
}

.error-content svg {
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.error-content h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.error-content p {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

.retry-btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.retry-btn:hover {
    background-color: var(--color-primary-dark);
}

/* ==========================================================================
   Utilities
   ========================================================================== */

.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   Scrollbar Styling
   ========================================================================== */

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

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

.chat-messages::-webkit-scrollbar-thumb {
    background-color: var(--color-gray-300);
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-gray-400);
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */

@media (max-width: 480px) {
    .chat-header {
        padding: var(--spacing-md);
    }
    
    .chat-messages {
        padding: var(--spacing-md);
    }
    
    .message-bubble {
        max-width: 85%;
    }
    
    .rewarded-footer {
        padding: 0.75rem var(--spacing-md);
    }
    
    .chat-input-container {
        padding: 0.75rem var(--spacing-md);
    }
}

/* Desktop - Center the chat with max width */
@media (min-width: 768px) {
    .chat-container {
        max-width: 640px;
        margin: 0 auto;
        box-shadow: var(--shadow-lg);
        border-left: 1px solid var(--color-gray-200);
        border-right: 1px solid var(--color-gray-200);
    }
}