:root {
    --color-navy: #1d3557;
    --color-navy-dark: #142845;
    --color-navy-light: #2a4a73;
    --color-grey: #6c757d;
    --color-grey-light: #adb5bd;
    --color-bg: #ffffff;
    --color-bg-alt: #f6f7f9;
    --color-text: #1a1a1a;
    --color-text-soft: #495057;
    --color-border: #e5e7eb;
    --shadow-sm: 0 1px 2px rgba(20, 40, 69, 0.04), 0 1px 3px rgba(20, 40, 69, 0.06);
    --shadow-md: 0 4px 6px rgba(20, 40, 69, 0.05), 0 10px 25px rgba(20, 40, 69, 0.08);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --max-width: 1100px;
    --transition: all 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    color: var(--color-navy-light);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--color-border);
}

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

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

.brand-logo {
    height: 40px;
    width: auto;
    display: block;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav a {
    color: var(--color-text-soft);
    font-weight: 500;
    font-size: 15px;
}

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

/* Hero */
.hero {
    padding: 120px 0 100px;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    text-align: center;
}

.hero-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--color-navy);
    margin-bottom: 24px;
}

.hero-title span {
    display: block;
    color: var(--color-grey);
    font-weight: 600;
    margin-top: 8px;
}

.hero-subtitle {
    font-size: clamp(16px, 1.6vw, 19px);
    color: var(--color-text-soft);
    max-width: 720px;
    margin: 0 auto 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--color-navy-dark);
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-ghost {
    background: transparent;
    color: var(--color-navy);
    border-color: var(--color-border);
}

.btn-ghost:hover {
    border-color: var(--color-navy);
    color: var(--color-navy);
    background: rgba(29, 53, 87, 0.04);
}

/* Sections */
.section {
    padding: 96px 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-title {
    font-size: clamp(28px, 3.2vw, 38px);
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 20px;
    letter-spacing: -0.01em;
}

.section-lead {
    font-size: 17px;
    color: var(--color-text-soft);
    max-width: 720px;
    margin-bottom: 16px;
}

/* Expertise */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 56px;
}

.expertise {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    transition: var(--transition);
}

.expertise:hover {
    border-color: var(--color-navy-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.expertise-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(29, 53, 87, 0.08);
    color: var(--color-navy);
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.02em;
    margin-bottom: 16px;
}

.expertise h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: 8px;
}

.expertise p {
    font-size: 14.5px;
    color: var(--color-text-soft);
    line-height: 1.6;
}

/* Products */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 48px;
}

.product-card {
    position: relative;
    display: block;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    transition: var(--transition);
    color: inherit;
}

.product-card:hover {
    border-color: var(--color-navy);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    color: inherit;
}

.product-card-coming {
    border-style: dashed;
    background: rgba(255, 255, 255, 0.5);
    cursor: default;
}

.product-card-coming:hover {
    border-color: var(--color-border);
    transform: none;
    box-shadow: none;
}

.product-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-navy-light);
    background: rgba(29, 53, 87, 0.08);
    padding: 4px 10px;
    border-radius: 999px;
    margin-bottom: 14px;
}

.product-card h3 {
    font-size: 19px;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: 8px;
}

.product-card p {
    font-size: 15px;
    color: var(--color-text-soft);
    line-height: 1.55;
    margin-bottom: 16px;
}

.product-cta {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-navy);
}

.product-card-coming .product-cta {
    color: var(--color-grey);
}

/* Contact */
.contact-inner {
    text-align: center;
    max-width: 720px;
    margin: 0 auto;
}

.contact-inner .section-lead {
    margin: 0 auto 32px;
}

.contact-email {
    display: inline-block;
    font-size: clamp(20px, 2vw, 24px);
    font-weight: 600;
    color: var(--color-navy);
    padding: 16px 32px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    transition: var(--transition);
}

.contact-email:hover {
    border-color: var(--color-navy);
    background: var(--color-navy);
    color: #ffffff;
}

/* Footer */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 32px 0;
    background: var(--color-bg);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.footer-brand strong {
    color: var(--color-navy);
    font-weight: 600;
    font-size: 15px;
}

.footer-brand span {
    color: var(--color-grey);
    font-size: 13px;
}

.footer-meta {
    display: flex;
    gap: 24px;
    color: var(--color-grey);
    font-size: 13px;
}

/* Responsive */
@media (max-width: 720px) {
    .nav {
        gap: 18px;
    }

    .nav a {
        font-size: 14px;
    }

    .hero {
        padding: 80px 0 64px;
    }

    .section {
        padding: 64px 0;
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }

    .footer-meta {
        flex-direction: column;
        gap: 4px;
    }
}

@media (max-width: 480px) {
    .nav {
        display: none;
    }

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

    .btn {
        width: 100%;
    }
}