/* ===== messages.css ===== */
/* Welcome message, message bubbles, options menu, loading indicators, */
/* list formatting, math (KaTeX), TikZ, gemini animations, typing cursor */

/* Welcome Message */
.welcome-message {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    padding: var(--space-2xl) 0;
    opacity: 0;
    animation: fadeIn var(--transition-slow) forwards;
    animation-delay: 200ms;
}

.welcome-message h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.welcome-message p {
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.7;
}


.logo-hero {
    position: relative;
    isolation: isolate;
    color: var(--color-accent);
    width: clamp(4.3125rem, 8.25vw, 5.625rem);
    aspect-ratio: 305.66846 / 398.17999;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
    transition: color var(--transition-base);
}

.logo-hero::before {
    content: '';
    position: absolute;
    z-index: -1;
    inset: 18% 8%;
    border-radius: 50%;
    background: var(--color-accent);
    filter: blur(32px);
    opacity: 0.14;
    transition: background-color var(--transition-base);
}

.logo-hero-mark {
    display: block;
    width: 100%;
    height: 100%;
    fill: currentColor;
    stroke: currentColor;
    stroke-width: 0.25;
    stroke-linejoin: round;
    filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.08));
}

/* Message Bubbles */
.message {
    max-width: 1000px !important; /* Constrain width for better readability */
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--space-xl);
    opacity: 0;
    animation: slideUp var(--transition-base) forwards;
    position: relative;
    
}

.message-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.message-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex: 1;
}

.message-options {
    position: relative;
    z-index: 1;
}

.message-options.menu-open {
    z-index: 1001;
}


.options-btn {
    width: 28px;
    height: 28px;
    border-radius: var(--border-radius-sm);
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-tertiary);
    opacity: 0;
    transition: all var(--transition-fast);
}

/* Only show options button on hover if no menu is currently open */
body:not(.menu-is-open) .message:hover .options-btn {
    opacity: 1;
}

.options-btn:hover {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.options-btn.active {
    opacity: 1;
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.options-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--space-xs);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    min-width: 160px;
    z-index: 1000;
    overflow: hidden;
    animation: slideDown 150ms ease-out;
}

.options-menu button {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: none;
    text-align: left;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 14px;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: background-color var(--transition-fast);
}

.options-menu button:hover {
    background-color: var(--color-bg-tertiary);
}

.options-menu button.danger:hover {
    background-color: #fee;
    color: #c00;
}

.options-menu button svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.options-menu hr {
    border: none;
    border-top: 1px solid var(--color-border-light);
    margin: var(--space-xs) 0;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
}

.message-avatar.user {
    background-color: var(--color-accent);
    color: white;
}

.message-avatar.assistant {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.message-avatar.embed {
    background-color: var(--color-success);
    color: white;
}

.message-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.message-content {
    margin-left: 40px;
    padding: var(--space-lg);
    background-color: var(--asst-bubble);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--content-font-size, 16px);
    line-height: 1.7;
}

.message.user .message-content {
    background-color: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.message-content p {
    margin-bottom: var(--space-md);
}

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

.message-content code {
    font-family: var(--font-mono);
    font-size: 13px;
    background-color: rgba(0, 0, 0, 0.05);
    padding: 2px 6px;
    border-radius: 4px;
}

.message.user .message-content code {
    background-color: rgba(255, 255, 255, 0.2);
}

.message-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-sm);
    margin: var(--space-md) auto;
    display: block;
}

.image-caption {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-sm);
    font-style: italic;
}

.message.image .message-avatar {
    background-color: #8b5cf6;
    color: white;
}



/* Typing Indicator */
/* Gemini-style loading indicator */
.gemini-loading {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: var(--space-md);
}

.loading-block {
    background: linear-gradient(
        90deg,
        var(--color-bg-tertiary) 0%,
        var(--color-bg-hover) 50%,
        var(--color-bg-tertiary) 100%
    );
    background-size: 200% 100%;
    border-radius: 4px;
    position: relative;
    overflow: hidden;
    animation: loadingPulse 1.5s ease-in-out infinite, loadingFadeIn 0.3s ease-out forwards;
    opacity: 0;
}

@keyframes loadingFadeIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Add shimmer to loading blocks too */
.loading-block::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.4) 50%,
        transparent 100%
    );
    animation: shimmerSlide 2s ease-in-out infinite;
}

[data-theme="dark"] .loading-block::after {
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.15) 50%,
        transparent 100%
    );
}

/* ===== Animations ===== */
/* ===== Animations ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* Embedded content in messages */
/* Embedded content in messages */
.message-content iframe {
    max-width: 100%;
    margin: var(--space-md) auto;
    display: block;
    border-radius: var(--border-radius-sm);
}

.embed-caption {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-sm);
    font-style: italic;
}


/* Images in messages */
/* Images in messages */
.message.image .message-avatar {
    background-color: #8b5cf6;
    color: white;
}

.message-image {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-sm);
    margin: var(--space-sm) auto;
    display: block;
    cursor: pointer;
    transition: transform var(--transition-base);
}

.message-image:hover {
    transform: scale(1.02);
}

.image-caption {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-sm);
    font-style: italic;
}


/* ===== Gemini-Style Block Reveal Animations ===== */

/* Placeholder blocks with pulsing shimmer effect */
.content-block-placeholder {
    background: linear-gradient(
        90deg,
        var(--color-bg-tertiary) 0%,
        var(--color-bg-hover) 50%,
        var(--color-bg-tertiary) 100%
    );
    background-size: 200% 100%;
    border-radius: var(--border-radius-sm);
    margin: var(--space-md) 0;
    position: relative;
    overflow: hidden;
    animation: shimmerPulse 1.5s ease-in-out infinite;
    opacity: 0;
    animation: placeholderFadeIn 0.3s ease-out forwards, shimmerPulse 1.5s ease-in-out infinite;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .content-block-placeholder {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

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

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

/* Shimmer overlay for more depth */
.placeholder-shimmer {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.4) 50%,
        transparent 100%
    );
    animation: shimmerSlide 2s ease-in-out infinite;
}

[data-theme="dark"] .placeholder-shimmer {
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.15) 50%,
        transparent 100%
    );
}

@keyframes shimmerSlide {
    0% {
        left: -100%;
    }
    100% {
        left: 200%;
    }
}

/* Content blocks that fade in */
.content-block-reveal {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.content-block-reveal.revealed {
    opacity: 1;
    transform: translateY(0) scale(1);
    /* Make wrapper transparent to layout - crucial for proper paragraph spacing */
    /* This allows margin collapse to work naturally between paragraphs */
    display: contents;
}

/* Don't add extra margins - let the natural .message-content p rules handle spacing */

/* ===== END Gemini-Style Animations ===== */

/* ===== Typing Animation Cursor ===== */
.typing-cursor::after {
    content: '';
    display: inline-block;
    margin-left: 2px;
    animation: blink 1s step-end infinite;
    color: var(--color-accent);
    font-weight: normal;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* Smooth content appearance during typing */
.message-content {
    transition: opacity 0.1s ease;
}

/* ===== Improved List Formatting in Messages ===== */
.message-content ul,
.message-content ol {
    margin: var(--space-md) 0;
    padding-left: var(--space-2xl);
}

.message-content li {
    margin: var(--space-sm) 0;
    line-height: 1.6;
}

.message-content ul {
    list-style-type: disc;
}

.message-content ul ul {
    list-style-type: circle;
    margin-top: var(--space-sm);
}

.message-content ol {
    list-style-type: decimal;
}

.message-content ol ol {
    list-style-type: lower-alpha;
    margin-top: var(--space-sm);
}

/* Better spacing for nested lists */
.message-content li > ul,
.message-content li > ol {
    margin-top: var(--space-sm);
    margin-bottom: var(--space-sm);
}

/* Headers in message content */
.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4 {
    margin-top: var(--space-lg);
    margin-bottom: var(--space-md);
    line-height: 1.3;
    color: var(--color-text-primary);
}

.message-content h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.message-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.message-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.message-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
}

/* Paragraphs in message content */
.message-content p {
    margin: var(--space-md) 0;
    line-height: 1.6;
}

/* Code blocks in message content */
.message-content code {
    background-color: var(--code-bg);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.message-content pre {
    background-color: var(--code-bg);
    padding: var(--space-md);
    border-radius: var(--border-radius-sm);
    overflow-x: auto;
    margin: var(--space-md) 0;
}

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

/* Blockquotes */
.message-content blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: var(--space-lg);
    margin: var(--space-md) 0;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Tables */
.message-content table {
    border-collapse: collapse;
    width: 100%;
    margin: var(--space-md) 0;
}

.message-content th,
.message-content td {
    border: 1px solid var(--color-border);
    padding: var(--space-sm) var(--space-md);
    text-align: left;
}

.message-content th {
    background-color: var(--color-bg-secondary);
    font-weight: 600;
}

/* ===== Enhanced KaTeX Math Rendering ===== */
.message-content .katex {
    font-size: 1.1em;
}

.message-content .katex-display {
    margin: var(--space-lg) 0;
    overflow-x: auto;
    overflow-y: hidden;
}

/* Inline math should align with text */
.message-content .katex {
    vertical-align: baseline;
}

/* Display math should be centered and prominent */
.message-content .katex-display > .katex {
    display: block;
    text-align: center;
}


/* Whiteboard message avatar */
/* Whiteboard message avatar */
.message-avatar.whiteboard {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.whiteboard-image {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: transform var(--transition-base);
    border: 1px solid var(--color-border);
}

.whiteboard-image:hover {
    transform: scale(1.02);
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* ===== TikZ Diagram Styling ===== */
script[type="text/tikz"] {
    display: block;
    margin: 0 auto;
    text-align: center;
}

/* TikZ Container - provides white background and styling */

.tikz-container {
    position: relative;  /* For absolute positioning of reload button */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: fit-content;
    max-width: 90%;
    margin: 2rem auto;
    padding: 2rem;
    background-color: #ffffff !important; /* Always white, even in dark mode */
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

/* SVG sizing within container */
.tikz-container svg {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Dark mode: Keep white background, adjust border */
    .message {
        max-width: 100%; /* Full width on mobile for better use of space */
    }

[data-theme="dark"] .tikz-container {
    background-color: #ffffff !important; /* Reinforce white in dark mode */
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

/* ===== Dark mode: neutralise hardcoded colours in AI-generated HTML ===== */
/* When the AI produces inline style="color:black" or similar, these rules
   override via specificity on the assistant message context. */
[data-theme="dark"] .message.assistant .message-content span[style*="color"],
[data-theme="dark"] .message.assistant .message-content p[style*="color"],
[data-theme="dark"] .message.assistant .message-content div[style*="color"],
[data-theme="dark"] .message.assistant .message-content li[style*="color"],
[data-theme="dark"] .message.assistant .message-content td[style*="color"],
[data-theme="dark"] .message.assistant .message-content th[style*="color"] {
    color: var(--color-text-primary) !important;
}

[data-theme="dark"] .message.assistant .message-content span[style*="background"],
[data-theme="dark"] .message.assistant .message-content div[style*="background"],
[data-theme="dark"] .message.assistant .message-content p[style*="background"],
[data-theme="dark"] .message.assistant .message-content td[style*="background"],
[data-theme="dark"] .message.assistant .message-content th[style*="background"] {
    background-color: var(--color-bg-tertiary) !important;
    color: var(--color-text-primary) !important;
}

/* Responsive sizing for smaller screens */
@media (max-width: 768px) {
    .message {
        max-width: 100%; /* Full width on mobile for better use of space */
    }

    .tikz-container {
        min-width: 320px;
        max-width: 100%;
        padding: 2rem;
        margin: 2rem auto;
    }
}