/* CSS Variables */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #0f172a;
    --accent: #06b6d4;
    --text: #334155;
    --text-light: #64748b;
    --background: #ffffff;
    --background-alt: #f8fafc;
    --border: #e2e8f0;
    --success: #10b981;
    --gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--background);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--secondary);
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--secondary);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

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

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary);
    text-decoration: none;
}

.logo-icon {
    color: var(--primary);
    font-size: 1.75rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--secondary);
    transition: all 0.3s;
}

/* Hero Section */
.hero {
    padding: 150px 0 100px;
    background: linear-gradient(180deg, var(--background-alt) 0%, var(--background) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    margin-bottom: 24px;
}

.highlight {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 32px;
    max-width: 540px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: flex-end;
}

.data-viz {
    display: flex;
    gap: 20px;
    align-items: flex-end;
    height: 300px;
    padding: 30px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.1);
}

.chart-bar {
    width: 40px;
    height: var(--height);
    background: var(--gradient);
    border-radius: 8px 8px 0 0;
    animation: grow 1s ease-out forwards;
    transform-origin: bottom;
}

@keyframes grow {
    from {
        transform: scaleY(0);
    }
    to {
        transform: scaleY(1);
    }
}

.chart-bar:nth-child(1) { animation-delay: 0.1s; }
.chart-bar:nth-child(2) { animation-delay: 0.2s; }
.chart-bar:nth-child(3) { animation-delay: 0.3s; }
.chart-bar:nth-child(4) { animation-delay: 0.4s; }
.chart-bar:nth-child(5) { animation-delay: 0.5s; }

/* Section Styles */
section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.25rem;
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Services Section */
.services {
    background: var(--background-alt);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.service-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.service-card h3 {
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-light);
}

/* About Section */
.about .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-content h2 {
    margin-bottom: 20px;
}

.about-content > p {
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.about-list {
    list-style: none;
}

.about-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 1.1rem;
}

.check {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--success);
    color: white;
    border-radius: 50%;
    font-size: 0.8rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.stat {
    text-align: center;
    padding: 30px;
    background: var(--background-alt);
    border-radius: 16px;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    display: block;
    margin-top: 8px;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Features Section */
.features {
    background: var(--secondary);
    color: white;
}

.features .section-title {
    color: white;
}

.features .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 40px;
}

.feature {
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    transition: background 0.3s;
}

.feature:hover {
    background: rgba(255, 255, 255, 0.05);
}

.feature-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.feature h3 {
    color: white;
    margin-bottom: 12px;
}

.feature p {
    color: rgba(255, 255, 255, 0.7);
}

/* Contact Section */
.contact {
    background: var(--background-alt);
}

.contact .container {
    max-width: 800px;
}

.contact-content {
    text-align: center;
    margin-bottom: 50px;
}

.contact-content h2 {
    margin-bottom: 16px;
}

.contact-content p {
    color: var(--text-light);
    font-size: 1.2rem;
}

.contact-form {
    background: white;
    padding: 50px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.contact-form .btn {
    width: 100%;
}

/* Footer */
.footer {
    background: var(--secondary);
    color: white;
    padding: 80px 0 30px;
}

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

.footer-brand .logo {
    color: white;
    margin-bottom: 16px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    max-width: 300px;
}

.footer-links h4 {
    color: white;
    margin-bottom: 20px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.2s;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
}

.footer-legal {
    display: flex;
    gap: 30px;
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: color 0.2s;
}

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

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

    .hero-content p {
        max-width: 100%;
    }

    .hero-buttons {
        justify-content: center;
    }

    .about .container {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 20px;
        border-bottom: 1px solid var(--border);
    }

    .nav-links.active {
        display: flex;
    }

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

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 30px;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

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

/* Animation for elements appearing on scroll */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}