:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-primary-light: #3b82f6;
    --color-hero-start: #0f172a;
    --color-hero-end: #1e3a5f;
    --color-bg: #ffffff;
    --color-surface: #f8fafc;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-border: #e2e8f0;
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    --max-width: 1200px;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --transition: 0.2s ease;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: scale(1.05);
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background-color: #ffffff;
    box-shadow: var(--shadow-md);
    padding: 0.75rem 0;
}

.navbar.scrolled .nav-logo,
.navbar.scrolled .nav-links a {
    color: var(--color-text);
}

.navbar.scrolled .nav-logo span {
    color: var(--color-primary);
}

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

.nav-logo {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.25rem;
    color: #ffffff;
    letter-spacing: -0.02em;
}

.nav-logo span {
    color: var(--color-primary-light);
}

.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 10;
}

.nav-toggle-label span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: #ffffff;
    transition: all var(--transition);
}

.navbar.scrolled .nav-toggle-label span {
    background-color: var(--color-text);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: #ffffff;
    font-weight: 600;
    font-size: 0.9rem;
    transition: color var(--transition);
}

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

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-hero-start) 0%, var(--color-hero-end) 100%);
    z-index: 0;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 70% 30%, rgba(37, 99, 235, 0.15) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 8rem 1.5rem 4rem;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.75);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    font-size: 1.1rem;
    margin-bottom: 3rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.features {
    padding: 5rem 0;
    background-color: var(--color-surface);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: #ffffff;
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

.about {
    padding: 5rem 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2rem;
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
}

.about-text p {
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.about-list li {
    color: var(--color-text);
    font-weight: 600;
    padding-left: 1.75rem;
    position: relative;
}

.about-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.4em;
    width: 8px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

.visual-block {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.visual-stat {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.visual-stat:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.stat-number {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.75rem;
    color: var(--color-primary);
    min-width: 120px;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--color-text-light);
}

.footer {
    background-color: var(--color-hero-start);
    color: #ffffff;
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.footer-brand h3 span {
    color: var(--color-primary-light);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    transition: color var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.85rem;
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

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

@media (max-width: 768px) {
    .nav-toggle-label {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: var(--color-hero-start);
        flex-direction: column;
        padding: 5rem 2rem 2rem;
        transform: translateX(100%);
        transition: transform 0.3s ease;
    }

    .nav-toggle:checked ~ .nav-links {
        transform: translateX(0);
    }

    .nav-links a {
        color: #ffffff;
        font-size: 1.1rem;
    }

    .hero-content h1 {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.875rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    .stat-number {
        font-size: 1.5rem;
        min-width: 100px;
    }
}

@media print {
    nav, .hero-bg, .no-print {
        display: none;
    }

    .hero {
        min-height: auto;
        padding: 2rem 0;
    }

    body {
        font-size: 12pt;
    }
}