:root {
    --background: #05070c;
    --surface: #0f1422;
    --surface-alt: #121a2d;
    --primary: #3cb5ff;
    --primary-dark: #2890cc;
    --accent: #9a7bff;
    --text-main: #f4f6ff;
    --text-muted: #a4acc7;
    --border: rgba(255, 255, 255, 0.08);
    --shadow: 0 18px 40px rgba(6, 20, 44, 0.35);
    --radius-lg: 22px;
    --radius-md: 16px;
    --radius-sm: 10px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Source Sans 3', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-main);
    background: radial-gradient(circle at top right, rgba(60, 181, 255, 0.18), transparent 40%),
                radial-gradient(circle at 12% 20%, rgba(154, 123, 255, 0.15), transparent 35%),
                var(--background);
}

h1, h2, h3 {
    font-family: 'Montserrat', system-ui, sans-serif;
    font-weight: 600;
    color: var(--text-main);
}

p {
    margin: 0 0 1rem;
    color: var(--text-muted);
}

a {
    color: inherit;
    text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 4px;
}

.container {
    width: min(1200px, 92vw);
    margin: 0 auto;
}

.section {
    padding: 96px 0;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 22px;
    border-radius: 999px;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    border: none;
    cursor: pointer;
}

.button.primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--text-main);
    box-shadow: 0 18px 38px rgba(60, 181, 255, 0.25);
}

.button.secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.button:hover {
    transform: translateY(-2px);
}

.site-header {
    position: sticky;
    top: 0;
    background: rgba(5, 7, 12, 0.85);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-logo {
    width: 58px;
    height: 58px;
    object-fit: contain;
}

.brand-name {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.nav-toggle {
    display: none;
}

.nav-links {
    display: flex;
    gap: 28px;
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-muted);
    transition: color 0.2s ease;
}

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

.hero {
    padding: 140px 0 110px;
}

.hero-inner {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 50px;
    align-items: center;
}

.hero-copy h1 {
    font-size: clamp(2.3rem, 4vw, 3.2rem);
    line-height: 1.12;
    margin-bottom: 18px;
}

.hero-copy p {
    font-size: 1.1rem;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 24px;
}

.hero-card {
    background: rgba(17, 25, 43, 0.85);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: var(--shadow);
}

.hero-card h2 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 1.2rem;
}

.hero-card ul {
    margin: 0;
    padding-left: 18px;
    color: var(--text-muted);
}

.services h2,
.approach h2,
.insights h2,
.contact h2 {
    text-align: center;
    margin-bottom: 56px;
    letter-spacing: 0.02em;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.service-card h3 {
    margin-top: 0;
    margin-bottom: 12px;
}

.service-card ul {
    margin: 18px 0 0;
    padding-left: 18px;
    color: var(--text-muted);
}

.approach {
    background: rgba(6, 11, 22, 0.95);
}

.approach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 28px;
}

.approach-step {
    background: var(--surface-alt);
    border-radius: var(--radius-md);
    padding: 26px;
    border: 1px solid rgba(255, 255, 255, 0.07);
    position: relative;
    overflow: hidden;
}

.step-number {
    position: absolute;
    top: -12px;
    right: 18px;
    font-size: 3.2rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.04);
}

.insight-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.insight-card {
    background: rgba(12, 19, 33, 0.85);
    border-radius: var(--radius-sm);
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.insight-card h3 {
    margin-top: 0;
    margin-bottom: 12px;
}

.text-link {
    color: var(--primary);
    font-weight: 500;
}

.cta {
    background: linear-gradient(135deg, rgba(50, 143, 255, 0.35), rgba(154, 123, 255, 0.3));
    padding: 72px 0;
}

.cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.contact-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 42px;
    align-items: start;
}

.contact-details {
    list-style: none;
    padding: 0;
    margin: 24px 0 0;
    color: var(--text-muted);
}

.contact-details span {
    display: inline-block;
    width: 96px;
    color: var(--text-main);
    font-weight: 600;
}

.contact-form {
    display: grid;
    gap: 14px;
    background: var(--surface);
    padding: 32px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow);
}

.contact-form label {
    font-weight: 500;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(10, 16, 26, 0.9);
    color: var(--text-main);
    padding: 12px 14px;
    font-size: 1rem;
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.site-footer {
    background: rgba(4, 6, 10, 0.95);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 26px 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--text-muted);
}

@media (max-width: 900px) {
    .hero-inner {
        grid-template-columns: 1fr;
    }

    .contact-inner {
        grid-template-columns: 1fr;
    }

    .cta-inner {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 720px) {
    .nav-toggle {
        display: inline-flex;
        background: rgba(255, 255, 255, 0.08);
        border: 1px solid rgba(255, 255, 255, 0.1);
        color: var(--text-main);
        border-radius: 999px;
        padding: 10px 18px;
        font-weight: 600;
        cursor: pointer;
    }

    .nav-links {
        position: absolute;
        top: 72px;
        right: 4vw;
        background: rgba(9, 14, 24, 0.95);
        flex-direction: column;
        padding: 18px;
        border-radius: var(--radius-md);
        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: var(--shadow);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-8px);
        transition: opacity 0.2s ease, transform 0.2s ease;
    }

    .nav-links[data-open="true"] {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .nav-links li {
        margin: 6px 0;
    }
}

@media (max-width: 520px) {
    .hero {
        padding-top: 120px;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}