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

:root {
    /* Color Palette */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;

    /* Neutrals */
    --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', sans-serif;

    /* Spacing */
    --container-max-width: 1280px;
    --section-padding: 100px;

    /* Transitions */
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 18px;
    line-height: 1.7;
    color: var(--gray-800);
    background-color: #ffffff;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 20px;
    color: var(--gray-900);
    cursor: pointer;
}

.logo-icon {
    display: flex;
    align-items: center;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
    margin: 0 auto;
}

.nav-links a {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 17px;
    transition: color var(--transition-base);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width var(--transition-base);
}

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

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

.cta-button {
    padding: 10px 24px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-base);
}

.cta-button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--gray-700);
    transition: all var(--transition-base);
}

/* Hero Section */
.hero {
    padding-top: 160px;
    padding-bottom: var(--section-padding);
    background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: 8px 16px;
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 72px;
    font-weight: 800;
    line-height: 1.1;
    color: var(--gray-900);
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 22px;
    line-height: 1.7;
    color: var(--gray-600);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.primary-button {
    padding: 16px 32px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.primary-button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.primary-button.large {
    padding: 18px 36px;
    font-size: 18px;
}

.secondary-button {
    padding: 16px 32px;
    background-color: white;
    color: var(--gray-700);
    border: 2px solid var(--gray-300);
    border-radius: 12px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: 8px;
}

.secondary-button:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.secondary-button.large {
    padding: 18px 36px;
    font-size: 18px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.stat {
    text-align: left;
}

.stat-number {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--gray-600);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 600px;
}

.floating-card {
    position: absolute;
    background: white;
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 16px;
    animation: float 6s ease-in-out infinite;
}

.card-1 {
    top: 50px;
    left: 20px;
    animation-delay: 0s;
}

.card-2 {
    top: 200px;
    right: 40px;
    animation-delay: 1s;
}

.card-3 {
    bottom: 100px;
    left: 80px;
    animation-delay: 2s;
}

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

.card-icon {
    font-size: 32px;
}

.card-content {
    flex: 1;
}

.card-title {
    font-weight: 600;
    font-size: 16px;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.card-subtitle {
    font-size: 14px;
    color: var(--gray-500);
}

.card-status {
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.card-status.success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.card-status.warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.card-progress {
    width: 100%;
    height: 6px;
    background-color: var(--gray-200);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 1s ease;
}

.hero-circle {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    animation: pulse 4s ease-in-out infinite;
}

.circle-1 {
    width: 300px;
    height: 300px;
    top: 0;
    right: 0;
    animation-delay: 0s;
}

.circle-2 {
    width: 200px;
    height: 200px;
    bottom: 100px;
    right: 150px;
    animation-delay: 1s;
}

.circle-3 {
    width: 150px;
    height: 150px;
    top: 250px;
    left: 50px;
    animation-delay: 2s;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

/* Section Styles */
section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-badge {
    display: inline-block;
    padding: 8px 16px;
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-title {
    font-size: 54px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 22px;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
}

/* Problem Section */
.problem-section {
    background-color: white;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 60px;
}

.problem-card {
    padding: 32px;
    border: 2px solid var(--gray-200);
    border-radius: 16px;
    transition: all var(--transition-base);
}

.problem-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.problem-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-radius: 16px;
    color: var(--primary-color);
    margin-bottom: 24px;
}

.problem-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.problem-description {
    font-size: 18px;
    color: var(--gray-600);
    line-height: 1.7;
}

.impact-banner {
    padding: 48px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 20px;
    color: white;
    text-align: center;
}

.impact-content h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}

.impact-content p {
    font-size: 18px;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
}

/* Mission Section */
.mission-section {
    background-color: var(--gray-50);
}

.mission-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.mission-description {
    font-size: 20px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 40px;
}

.mission-points {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mission-point {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.point-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    color: white;
    border-radius: 8px;
    font-weight: 700;
    flex-shrink: 0;
}

.point-text {
    font-size: 18px;
    color: var(--gray-700);
    line-height: 1.7;
    padding-top: 4px;
}

.mission-diagram {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.diagram-center {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-2xl);
    z-index: 2;
}

.center-logo {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 8px;
}

.center-subtitle {
    font-size: 14px;
    opacity: 0.9;
}

.diagram-node {
    position: absolute;
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    width: 160px;
    animation: float 6s ease-in-out infinite;
}

.node-1 {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.node-2 {
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    animation-delay: 1s;
}

.node-3 {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 2s;
}

.node-4 {
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    animation-delay: 3s;
}

.node-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.node-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
}

/* Solution Section */
.solution-section {
    background-color: white;
}

.solution-tracks {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.track {
    border: 2px solid var(--gray-200);
    border-radius: 20px;
    overflow: hidden;
    transition: all var(--transition-base);
}

.track:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl);
}

.track-header {
    padding: 40px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    text-align: center;
}

.track-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    font-size: 40px;
}

.track-icon.nonprofit {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
}

.track-icon.commercial {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
}

.track-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.track-subtitle {
    font-size: 16px;
    color: var(--gray-600);
}

.track-content {
    padding: 40px;
}

.track-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.track-list li {
    padding-left: 32px;
    position: relative;
    font-size: 18px;
    color: var(--gray-700);
    line-height: 1.7;
}

.track-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* Standards Section */
.standards-section {
    background-color: var(--gray-50);
}

.standards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.standard-card {
    padding: 32px;
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: 16px;
    transition: all var(--transition-base);
}

.standard-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.standard-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.standard-icon {
    font-size: 32px;
}

.standard-name {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
}

.standard-description {
    font-size: 17px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 20px;
}

.standard-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.feature-tag {
    padding: 6px 12px;
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
}

/* Research Section */
.research-section {
    background-color: white;
}

.research-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.research-image {
    position: relative;
    height: 500px;
}

.ai-visualization {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-layer {
    position: absolute;
    border: 2px solid rgba(99, 102, 241, 0.2);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.layer-1 {
    width: 400px;
    height: 400px;
    animation-duration: 15s;
}

.layer-2 {
    width: 300px;
    height: 300px;
    animation-duration: 20s;
    animation-direction: reverse;
}

.layer-3 {
    width: 200px;
    height: 200px;
    animation-duration: 25s;
}

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

.ai-center {
    z-index: 2;
}

.research-description {
    font-size: 20px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 40px;
}

.research-areas {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.research-area {
    display: flex;
    gap: 20px;
}

.area-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-radius: 12px;
    font-size: 28px;
    flex-shrink: 0;
}

.area-content {
    flex: 1;
}

.area-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.area-description {
    font-size: 18px;
    color: var(--gray-600);
    line-height: 1.7;
}

/* Global Section */
.global-section {
    background-color: var(--gray-50);
}

.phases-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.phase-card {
    padding: 32px;
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: 16px;
    transition: all var(--transition-base);
}

.phase-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.phase-number {
    display: inline-block;
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-radius: 12px;
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 20px;
}

.phase-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.phase-timeline {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 24px;
}

.phase-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.phase-list li {
    padding-left: 24px;
    position: relative;
    font-size: 14px;
    color: var(--gray-700);
    line-height: 1.5;
}

.phase-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 20px;
}

/* Impact Section */
.impact-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.impact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
}

.impact-stat {
    text-align: center;
}

.stat-value {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 12px;
}

.impact-stat .stat-label {
    font-size: 16px;
    opacity: 0.95;
    color: white;
}

/* CTA Section */
.cta-section {
    background-color: white;
    text-align: center;
}

.cta-title {
    font-size: 48px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 20px;
}

.cta-subtitle {
    font-size: 20px;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto 48px;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 48px;
}

.cta-info {
    display: flex;
    gap: 40px;
    justify-content: center;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--gray-600);
    font-size: 16px;
}

.info-item svg {
    color: var(--primary-color);
}

/* Footer */
.footer {
    background-color: var(--gray-900);
    color: white;
    padding: 80px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 20px;
    margin-bottom: 20px;
}

.footer-description {
    font-size: 15px;
    color: var(--gray-400);
    line-height: 1.6;
}

.footer-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 15px;
    transition: color var(--transition-base);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid var(--gray-800);
}

.footer-copyright {
    font-size: 14px;
    color: var(--gray-400);
}

.footer-legal {
    display: flex;
    gap: 32px;
}

.footer-legal a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 14px;
    transition: color var(--transition-base);
}

.footer-legal a:hover {
    color: white;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .hero-visual {
        height: 400px;
    }

    .mission-content,
    .research-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .problems-grid,
    .standards-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .phases-timeline {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 40px;
    }

    .section-title {
        font-size: 32px;
    }

    .problems-grid,
    .standards-grid,
    .solution-tracks,
    .phases-timeline {
        grid-template-columns: 1fr;
    }

    .hero-stats,
    .impact-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .cta-info {
        flex-direction: column;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }

    .section-title {
        font-size: 28px;
    }

    .hero-stats,
    .impact-grid {
        grid-template-columns: 1fr;
    }
}