@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

* {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(to right, rgba(0, 0, 0, 0.06) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0, 0, 0, 0.06) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: 0 0, 0 0;
    pointer-events: none;
    opacity: 0.4;
    z-index: 0;
}

#navbar {
    transition: all 0.3s ease;
}

#navbar.scrolled {
    top: 1rem;
    box-shadow: 0 4px 12px -2px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.06);
}

.grid-pattern {
    display: none;
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card {
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
}

.btn-primary {
    transition: all 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.btn-primary:active {
    transform: translateY(0);
}

.input-focus:focus {
    transform: scale(1.01);
    transition: transform 0.2s ease;
}

.scrollbar-hide::-webkit-scrollbar {
    display: none;
}

.scrollbar-hide {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.logo-img {
    object-fit: contain;
    flex-shrink: 0;
}

.markdown-content {
    line-height: 1.7;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4 {
    font-weight: 700;
    margin-top: 1.5em;
    margin-bottom: 0.75em;
    color: #111827;
}

.markdown-content h1 {
    font-size: 1.875rem;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 0.5em;
}

.markdown-content h2 {
    font-size: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
    padding-bottom: 0.5em;
}

.markdown-content h3 {
    font-size: 1.25rem;
}

.markdown-content h4 {
    font-size: 1.125rem;
}

.markdown-content p {
    margin-bottom: 1em;
}

.markdown-content ul,
.markdown-content ol {
    margin-left: 1.5em;
    margin-bottom: 1em;
}

.markdown-content li {
    margin-bottom: 0.5em;
}

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

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

.markdown-content strong {
    font-weight: 600;
    color: #111827;
}

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

.markdown-content code {
    background-color: #f3f4f6;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
}

.markdown-content pre {
    background-color: #f3f4f6;
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin-bottom: 1em;
}

.markdown-content pre code {
    background-color: transparent;
    padding: 0;
}

.markdown-content blockquote {
    border-left: 4px solid #000000;
    padding-left: 1rem;
    margin-left: 0;
    margin-bottom: 1em;
    color: #6b7280;
    font-style: italic;
}

.markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1em;
}

.markdown-content th,
.markdown-content td {
    border: 1px solid #e5e7eb;
    padding: 0.5rem;
    text-align: left;
}

.markdown-content th {
    background-color: #f9fafb;
    font-weight: 600;
}

.markdown-content hr {
    border: none;
    border-top: 1px solid #e5e7eb;
    margin: 2em 0;
}

.markdown-content .katex {
    font-size: 1.1em;
}

.markdown-content .katex-display {
    margin: 1em 0;
    overflow-x: auto;
    overflow-y: hidden;
}

.markdown-content .katex-display > .katex {
    white-space: nowrap;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading-dots {
    display: inline-block;
}

.loading-dots::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% {
        content: '.';
    }
    40% {
        content: '..';
    }
    60%, 100% {
        content: '...';
    }
}

.stat-item {
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-4px);
}

.stat-item div:first-child {
    transition: transform 0.3s ease;
}

.stat-item:hover div:first-child {
    transform: scale(1.1);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.feature-card {
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.02), transparent);
    transition: left 0.5s ease;
}

.feature-card:hover::before {
    left: 100%;
}

@keyframes slideInFromBottom {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

.fade-in-up.delayed-1 {
    animation-delay: 0.1s;
    opacity: 0;
}

.fade-in-up.delayed-2 {
    animation-delay: 0.2s;
    opacity: 0;
}

.fade-in-up.delayed-3 {
    animation-delay: 0.3s;
    opacity: 0;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 768px) {
    .stat-item {
        margin-bottom: 1.5rem;
    }
    
    .feature-card {
        margin-bottom: 1rem;
    }
}

.feature-tab {
    transition: all 0.2s ease;
}

.feature-tab:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

.feature-panel {
    transition: opacity 0.3s ease;
}

.feature-panel.active {
    animation: fadeIn 0.3s ease-in;
}

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

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}