/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Sophisticated Harvey/Notion-inspired palette */
    --primary-color: #1a1a1a;
    --primary-hover: #2d2d2d;
    --secondary-color: #6b7280;
    --accent-color: #374151;
    --success-color: #059669;
    --warning-color: #dc2626;
    
    /* Neutral colors */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* 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);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: #ffffff;
    overflow-x: hidden;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: var(--gray-900);
}

.nav-logo i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: color 0.2s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--primary-color);
    transition: width 0.2s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-200);
    transform: translateY(-1px);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.contribution-btn {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.contribution-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #fafafa 0%, #f5f5f5 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(209, 213, 219, 0.5) 1px, transparent 1px),
        linear-gradient(90deg, rgba(209, 213, 219, 0.5) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.8;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    background: rgba(26, 26, 26, 0.05);
    color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 50px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(26, 26, 26, 0.1);
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    color: var(--gray-900);
}

.gradient-text {
    color: var(--primary-color);
    font-weight: 700;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
}

.hero-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
}

.highlight-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(26, 26, 26, 0.05);
    color: var(--gray-700);
    border-radius: 999px;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    border: 1px solid rgba(26, 26, 26, 0.08);
}

.highlight-pill i {
    color: var(--primary-color);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

/* Floating Cards */
.hero-visual {
    position: relative;
    height: 500px;
}

.floating-card {
    position: absolute;
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 140px;
    transition: transform 0.3s ease;
}

.floating-card:hover {
    transform: translateY(-5px);
}

.floating-card i {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.floating-card span {
    font-weight: 500;
    font-size: var(--font-size-sm);
    text-align: center;
    color: var(--gray-700);
}

.card-1 {
    top: 20px;
    left: 20px;
    animation: float 6s ease-in-out infinite;
}

.card-1 i { color: var(--primary-color); }

.card-2 {
    top: 80px;
    right: 40px;
    animation: float 6s ease-in-out infinite 1.5s;
}

.card-2 i { color: var(--accent-color); }

.card-3 {
    bottom: 120px;
    left: 60px;
    animation: float 6s ease-in-out infinite 3s;
}

.card-3 i { color: var(--success-color); }

.card-4 {
    bottom: 60px;
    right: 20px;
    animation: float 6s ease-in-out infinite 4.5s;
}

.card-4 i { color: var(--warning-color); }

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* How It Works Section */
.how-it-works {
    padding: var(--spacing-3xl) 0;
    background: white;
}

.how-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-2xl);
    align-items: stretch;
}

.how-card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.how-card::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.05), transparent 60%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.how-card:hover::after {
    opacity: 1;
}

.how-card h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.how-card p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.how-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    color: var(--gray-600);
}

.how-list li {
    position: relative;
    padding-left: 24px;
    line-height: 1.5;
}

.how-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-color);
}

.cell-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.cell-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 999px;
    background: var(--gray-100);
    color: var(--gray-700);
    font-size: var(--font-size-sm);
    border: 1px solid var(--gray-200);
}

.cell-pill i {
    color: var(--primary-color);
}

.old-way {
    background: linear-gradient(135deg, rgba(229, 231, 235, 0.6), rgba(243, 244, 246, 0.2));
}

.new-way {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(219, 234, 254, 0.4));
    border-color: rgba(59, 130, 246, 0.2);
}

/* Advantages Section */
.advantages {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-50);
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-2xl);
}

.advantage-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    border: 1px solid var(--gray-200);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    position: relative;
    overflow: hidden;
}

.advantage-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.05), transparent 65%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.advantage-card:hover::after {
    opacity: 1;
}

.adv-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gray-900);
    color: white;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.advantage-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.advantage-card p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* Vision Section */
.vision {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-50);
}

.vision-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.vision-text h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.vision-subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-2xl);
}

.vision-points {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.vision-point {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.point-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.point-content h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.point-content p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: var(--spacing-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gray-300);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-2xl);
    padding-left: var(--spacing-xl);
}

.timeline-dot {
    position: absolute;
    left: -28px;
    top: 0;
    width: 16px;
    height: 16px;
    background: var(--gray-300);
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: var(--shadow-sm);
}

.timeline-item.active .timeline-dot {
    background: var(--primary-color);
}

.timeline-content h5 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.timeline-content p {
    color: var(--gray-600);
    font-size: var(--font-size-sm);
}

/* Architecture Section */
.architecture {
    padding: var(--spacing-3xl) 0;
    background: white;
}

.tl-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.tl-card {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    border: 1px solid var(--gray-200);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.tl-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-900);
}

.tl-card p {
    color: var(--gray-600);
    line-height: 1.6;
}

.architecture-panels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.architecture-panel {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-sm);
}

.architecture-panel h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
}

.arc-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    color: var(--gray-600);
}

.arc-list li {
    position: relative;
    padding-left: 20px;
    line-height: 1.5;
}

.arc-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
}

.product-vision {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: var(--spacing-3xl);
    border: 1px solid var(--gray-200);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.product-vision h3 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
}

.product-vision p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-2xl);
}

.product-card {
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-sm);
}

.product-card h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.product-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    color: var(--gray-600);
    line-height: 1.5;
}

.product-card li strong {
    color: var(--gray-900);
}

/* Contact Section */
.contact {
    padding: var(--spacing-3xl) 0;
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-info h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
}

.contact-info p {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.contact-item {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: var(--spacing-xs);
}

.contact-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-item p {
    color: var(--gray-600);
    margin: 0;
}

/* Form Styles */
.form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form input,
.form select,
.form textarea {
    padding: var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form input:focus,
.form select:focus,
.form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form textarea {
    resize: vertical;
    min-height: 100px;
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: white;
    margin-bottom: var(--spacing-md);
}

.footer-logo i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.footer-brand p {
    color: var(--gray-400);
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: var(--spacing-3xl);
}

.footer-section h4 {
    color: white;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.footer-section a {
    display: block;
    color: var(--gray-400);
    text-decoration: none;
    margin-bottom: var(--spacing-sm);
    transition: color 0.2s ease;
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--gray-800);
    text-align: center;
    color: var(--gray-500);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container,
    .vision-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .how-grid,
    .advantage-grid,
    .tl-grid,
    .architecture-panels,
    .product-grid {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        height: 300px;
    }

    .floating-card {
        min-width: 120px;
        padding: var(--spacing-md);
    }

    .nav-menu {
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .nav-container {
        padding: 0 var(--spacing-md);
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .section-header h2 {
        font-size: var(--font-size-3xl);
    }

    .hero-highlights {
        flex-direction: column;
        align-items: stretch;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }

    .nav-menu {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .floating-card {
        min-width: 100px;
        padding: var(--spacing-sm);
    }
    
    .floating-card i {
        font-size: 1.5rem;
    }
    
    .floating-card span {
        font-size: var(--font-size-xs);
    }
}