:root {
    --color-primary: #00558a;
    --color-primary-light: #2e6ea6;
    --color-accent: #0074c7;
    --color-bg: #f5f7fa;
    --color-bg-alt: #ffffff;
    --color-text: #222222;
    --color-border: #dde3eb;
    --shadow-soft: 0 10px 25px rgba(0, 0, 0, 0.08);
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --transition-fast: 0.2s ease-in-out;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

a {
    color: var(--color-primary);
    text-decoration-thickness: 0.08em;
    text-underline-offset: 0.15em;
}

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

a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
}

/* Skip-Link */
.skip-link {
    position: absolute;
    left: -999px;
    top: 0.5rem;
    padding: 0.5rem 1rem;
    background: #000;
    color: #fff;
    z-index: 1000;
}

.skip-link:focus {
    left: 0.5rem;
}

/* Layout */
.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.site-header {
    background: #ffffff;
    box-shadow: 0 2px 12px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 500;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
}

.logo-wrapper {
    flex-shrink: 0;
}

.site-logo {
    height: 100px;
    width: auto;
}

/* Navigation */
.main-nav {
    position: relative;
}

.nav-list {
    list-style: none;
    display: flex;
    gap: 1rem;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-list a {
    font-size: 0.95rem;
    font-weight: 500;
    white-space: nowrap;
}

.nav-cta-wrap {
    margin-left: 0.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.55rem 1.2rem;
    border-radius: 999px;
    border: none;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: #ffffff;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    box-shadow: 0 8px 18px rgba(0,0,0,0.15);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(0,0,0,0.18);
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 4px 10px rgba(0,0,0,0.18);
}

/* Nav Toggle for mobile */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: 0.5rem;
    margin-right: -0.5rem;
}

.nav-toggle-bar {
    width: 22px;
    height: 2px;
    background: #111;
    display: block;
    margin: 4px 0;
    border-radius: 999px;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, #0a1623, #1c3f63);
    color: #ffffff;
    min-height: 180px;
    max-height: 240px;
    display: flex;
    align-items: center;
}

.hero-inner {
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
}

.hero-kicker {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.8rem;
    margin: 0 0 0.3rem 0;
    opacity: 0.9;
}

.hero h1 {
    margin: 0 0 0.6rem 0;
    font-size: 1.8rem;
}

.hero-text {
    max-width: 50rem;
    margin: 0;
    font-size: 1rem;
}

/* Main */
.site-main {
    padding-top: 2.5rem;
    padding-bottom: 3rem;
}

.section {
    margin-bottom: 3rem;
    background: transparent;
}

.section-two-column {
    background: transparent;
}

.section > p {
    max-width: 48rem;
}

h1, h2, h3, h4 {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.25;
}

h2 {
    font-size: 1.5rem;
    margin-top: 0;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.15rem;
    margin-top: 0;
    margin-bottom: 0.75rem;
}

h4 {
    font-size: 1.05rem;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.two-column {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 2rem;
    align-items: flex-start;
}

.highlight-box {
    background: var(--color-bg-alt);
    border-radius: var(--radius-xl);
    padding: 1.5rem 1.5rem 1.5rem 1.5rem;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--color-border);
}

/* Comparison grid */
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.comparison-item {
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.25rem 1.5rem 1.25rem;
    border: 1px solid var(--color-border);
    box-shadow: 0 6px 18px rgba(0,0,0,0.05);
}

.comparison-heading {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

/* Product tiles */
.tiles-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1.5rem;
}

.tile {
    background: var(--color-bg-alt);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--color-border);
    height: 100%;
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.tile-link {
    display: flex;
    flex-direction: column;
    height: 100%;
    color: inherit;
    text-decoration: none;
}

.tile-image-wrapper {
    background: #f0f3f8;
    padding: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tile-image-wrapper img {
    max-height: 180px;
    width: 100%;
    object-fit: contain;
}

.tile-body {
    padding: 1.25rem 1.25rem 1.4rem 1.25rem;
}

.tile-title {
    font-weight: 600;
    margin: 0 0 0.35rem 0;
}

.tile-text {
    margin: 0;
    font-size: 0.92rem;
    color: #444;
}

.tile:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 30px rgba(0,0,0,0.12);
}

/* Inline links behaviour */
.inline-link {
    white-space: nowrap;
}

@media (min-width: 1200px) {
    .inline-link {
        display: inline-block;
        max-width: 260px;
        overflow: hidden;
        text-overflow: ellipsis;
        vertical-align: bottom;
    }
}

/* FAQ */
.section-faq {
    background: transparent;
}

.faq {
    margin-top: 1.5rem;
}

.faq-item + .faq-item {
    margin-top: 0.75rem;
}

.faq-question {
    width: 100%;
    text-align: left;
    background: #ffffff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    padding: 0.85rem 1rem;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.faq-question::after {
    content: "+";
    font-weight: 700;
    margin-left: 1rem;
}

.faq-question[aria-expanded="true"]::after {
    content: "–";
}

.faq-answer {
    padding: 0.75rem 1rem 1rem 1rem;
    background: #ffffff;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    border: 1px solid var(--color-border);
    border-top: none;
}

/* Footer */
.site-footer {
    background: #0a1623;
    color: #ffffff;
    padding: 1rem 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    font-size: 0.9rem;
}

.footer-right a {
    color: #ffffff;
    text-decoration: none;
    margin-left: 1rem;
}

.footer-right a:hover {
    text-decoration: underline;
}

/* Utilities */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Responsive */
@media (max-width: 1024px) {
    .two-column {
        grid-template-columns: minmax(0, 1fr);
    }

    .comparison-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .tiles-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
        align-items: flex-start;
    }

    .nav-toggle {
        display: inline-block;
    }

    .nav-list {
        position: absolute;
        right: 0;
        top: 100%;
        margin-top: 0.5rem;
        flex-direction: column;
        background: #ffffff;
        padding: 0.75rem 1rem 0.5rem 1rem;
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-soft);
        min-width: 230px;
        display: none;
    }

    .nav-list.is-open {
        display: flex;
    }

    .nav-cta-wrap {
        margin-left: 0;
        margin-top: 0.25rem;
    }

    .hero {
        max-height: none;
    }

    .hero h1 {
        font-size: 1.55rem;
    }

    .tiles-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

    .footer-right a {
        margin-left: 0;
        margin-right: 1rem;
    }
}

@media (max-width: 480px) {
    .tiles-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .comparison-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .site-logo {
        height: 80px;
    }
}