:root {
    --color-navy: #003366;
    --color-primary: #0055aa;
    --color-primary-hover: #004488;
    --color-text: #333;
    --color-muted: #555;
    --color-border: #dde3ea;
    --color-surface: #f0f4f9;
    --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.15);
    --radius-sm: 4px;
    --radius-md: 6px;
    --header-height: 60px;
    --section-padding-x: 2rem;
    --section-padding-y: 1.5rem;
    --section-stack-gap: 0.75rem;
}

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

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    color: var(--color-text);
    background-color: #ffffff;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background-color: var(--color-navy);
    color: white;
    padding: 0 1em;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    height: var(--header-height);
}

header > div {
    display: flex;
    align-items: center;
    height: 100%;
}

header img {
    height: 40px;
    margin-right: 1rem;
}

nav a {
    color: white;
    margin-left: 1.2rem;
    text-decoration: none;
    font-weight: 500;
}

nav a:hover {
    text-decoration: underline;
}

nav a:focus-visible,
.nav-toggle:focus-visible,
.btn:focus-visible,
a.btn:focus-visible {
    outline: 2px solid #ffffff;
    outline-offset: 2px;
}

.nav-toggle {
    display: none;
    position: static;
    margin-left: auto;
    background: none;
    border: none;
    font-size: 2em;
    cursor: pointer;
    color: white;
    border-radius: var(--radius-sm);
    padding: 0.1em 0.3em;
}

.hero {
    padding: 2.5rem var(--section-padding-x) 2rem;
    text-align: center;
    background: linear-gradient(135deg, var(--color-surface) 0%, #ffffff 100%);
    border-bottom: 1px solid var(--color-border);
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 1.25rem;
    color: var(--color-muted);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    background-color: var(--color-primary);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius-sm);
    border: none;
    text-decoration: none;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.btn:hover {
    background-color: var(--color-primary-hover);
    color: white;
    text-decoration: none;
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

.cta-buttons .btn {
    margin: 0;
}

.section {
    padding: var(--section-padding-y) var(--section-padding-x);
    max-width: 1000px;
    margin: auto;
    width: 100%;
}

.hero + .section,
.section + .section {
    padding-top: var(--section-stack-gap);
}

.section h2 {
    color: var(--color-navy);
    margin-bottom: 1rem;
    text-align: center;
}

.section h3 {
    color: var(--color-navy);
    margin-top: 0;
}

.section p {
    margin-top: 0;
}

.section ul,
.section ol {
    margin: 0 0 1rem;
    padding-left: 1.5rem;
}

.section li {
    margin-bottom: 0.5rem;
}

.section li:last-child {
    margin-bottom: 0;
}

.section a:not(.btn) {
    color: var(--color-primary);
}

.section a:not(.btn):hover {
    color: var(--color-primary-hover);
}

.lead {
    text-align: center;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    color: var(--color-muted);
}

.lead .btn {
    margin-top: 1rem;
}

.text-center {
    text-align: center;
}

.section-actions {
    text-align: center;
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

.inline-follow {
    display: inline-flex;
    align-items: center;
    margin-left: 0.35rem;
    vertical-align: middle;
    font-size: 1.15em;
    text-decoration: none;
}

.inline-follow:hover {
    text-decoration: none;
}

.inline-follow:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: 50%;
}

.pricing-table-wrap {
    width: 100%;
    text-align: center;
}

.pricing-table {
    display: inline-table;
    width: max-content;
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
    border-collapse: separate;
    border-spacing: 0;
    background-color: white;
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.pricing-table th,
.pricing-table td {
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
}

.pricing-table th:first-child,
.pricing-table td:first-child {
    padding-right: 3.5rem;
}

.pricing-table th:last-child,
.pricing-table td:last-child {
    text-align: right;
    padding-left: 3.5rem;
    white-space: nowrap;
}

.pricing-table th {
    background-color: var(--color-navy);
    color: white;
    font-weight: 600;
}

.pricing-table tbody tr:last-child td {
    border-bottom: none;
}

.pricing-table tbody tr:hover {
    background-color: var(--color-surface);
}

.features {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    gap: 1.5rem;
}

.feature {
    flex: 1 1 220px;
    background-color: white;
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    border: 1px solid transparent;
    transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.feature:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-border);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}

main {
    flex: 1;
}

.footer {
    background-color: var(--color-navy);
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: auto;
    font-size: 0.9rem;
}

.footer-links {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    margin: 0 0.75rem;
}

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

.footer p {
    margin: 0;
}

/* EULA */
.page-eula .eula-content {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
    font-size: 1rem;
    color: var(--color-text);
    font-family: inherit;
}

.page-eula .eula-content p,
.page-eula .eula-content li {
    margin-bottom: 0.75rem;
}

.page-eula .eula-content b,
.page-eula .eula-content strong {
    color: var(--color-navy);
}

.page-eula .eula-error {
    color: #dc3545;
    text-align: center;
}

/* FAQ */
.faq-section {
    max-width: 1000px;
    margin: auto;
    padding: 2rem;
}

.faq-item {
    margin-bottom: 1rem;
    border-bottom: 1px solid #ccc;
}

.faq-question {
    font-weight: bold;
    cursor: pointer;
    padding: 0.8rem 0;
    color: var(--color-navy);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-question:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.faq-answer {
    display: none;
    padding-bottom: 1rem;
    color: var(--color-muted);
}

/* Forms (shared across join, request-access, etc.) */
.form {
    max-width: 500px;
    margin: 2rem auto;
    text-align: center;
}

.form-input {
    width: 100%;
    padding: 0.8rem;
    margin-bottom: 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid #ccc;
    font: inherit;
}

.form-input:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 1px;
    border-color: var(--color-primary);
}

.form-hint {
    color: #6c757d;
    display: block;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
}

.error,
.form-error {
    color: #dc3545;
    display: block;
    margin-bottom: 1rem;
}

.error.hidden,
.form-error.hidden {
    display: none;
}

.form-tight {
    margin-top: 0;
    margin-bottom: 0;
}

.section-compact {
    text-align: center;
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.text-hint {
    display: inline-block;
    margin-top: 0.75rem;
    font-size: 0.85rem;
    line-height: 1.35;
    color: #444;
}

/* Download page */
.page-download .hero-compact {
    padding: 2rem 2rem 1.25rem;
}

.page-download .hero-compact h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.page-download .hero-compact p {
    font-size: 1.05rem;
    margin-bottom: 1rem;
}

.page-download .section {
    padding: 1.25rem 2rem;
}

.page-download .hero-compact + .section,
.page-download .section + .section {
    padding-top: 0.5rem;
}

.page-download .section h2 {
    margin-bottom: 0.75rem;
}

.hero-banner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    color: var(--color-muted);
}

.download-entry {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 1.25rem;
}

.download-entry:last-child {
    margin-bottom: 0;
}

.download-entry h3 {
    color: var(--color-navy);
    margin: 0 0 0.5rem;
    font-size: 1.1rem;
}

.expandable {
    max-width: 700px;
    margin: 1rem auto 0;
    text-align: left;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
}

.expandable summary {
    padding: 0.75rem 1rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--color-navy);
    list-style: none;
}

.expandable summary::-webkit-details-marker {
    display: none;
}

.expandable summary::before {
    content: "\25B8  ";
    display: inline-block;
    transition: transform 0.15s ease;
}

.expandable[open] summary::before {
    transform: rotate(90deg);
}

.expandable summary:hover {
    color: var(--color-primary);
}

.expandable summary:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

.expandable-body {
    padding: 0 1rem 1rem;
    color: var(--color-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

.expandable-body p {
    margin: 0 0 0.75rem;
}

.expandable-body p:last-child {
    margin-bottom: 0;
}

.expandable-body ol,
.expandable-body ul {
    margin: 0;
    padding-left: 1.25rem;
}

.expandable-body li {
    margin-bottom: 0.35rem;
}

.expandable-body code {
    font-family: "Courier New", monospace;
    font-size: 0.85em;
    background: #ffffff;
    padding: 0.1em 0.35em;
    border-radius: 3px;
    border: 1px solid var(--color-border);
}

.form .expandable {
    margin: 0 0 2rem;
    max-width: none;
}

.form .expandable .form-input {
    margin-bottom: 0.5rem;
}

.form .expandable .error {
    margin-bottom: 0.5rem;
}

.form .expandable .form-hint {
    margin-bottom: 0;
}

.text-muted-sm {
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.text-muted-sm-spaced {
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-muted);
    margin-top: 1rem;
}

.text-success {
    color: #28a745;
}

.text-emphasis {
    font-weight: bold;
}

.lead-narrow {
    text-align: center;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.content-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.narrow-content {
    max-width: 800px;
    margin: 2rem auto;
    text-align: center;
}

.narrow-content h2 {
    color: var(--color-navy);
    margin-bottom: 1rem;
}

.regular {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--color-muted);
}

.stack-block {
    margin-bottom: 2rem;
}

.stack-block .btn {
    margin: 1rem 0;
}

.code-block {
    font-family: "Courier New", monospace;
    background-color: #f8f9fa;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid #dee2e6;
    margin: 0.5rem 0;
}

.panel {
    background-color: #f8f9fa;
    padding: 2rem;
    border-radius: 8px;
    margin: 2rem 0;
}

.panel-muted {
    background-color: #f5f5f5;
    padding: 2rem;
    border-radius: 8px;
}

.notice {
    max-width: 600px;
    margin: 2rem auto;
    text-align: center;
}

.notice-icon {
    font-size: 48px;
    margin-bottom: 1rem;
}

.notice-steps {
    text-align: left;
    display: inline-block;
    margin: 1rem 0;
}

.notice-footer {
    margin-top: 2rem;
    color: var(--color-muted);
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    padding: 1rem;
    border-radius: var(--radius-sm);
    margin-top: 2rem;
    text-align: center;
}

.error-page {
    text-align: center;
    max-width: 800px;
    margin: 4rem auto;
}

.error-icon {
    font-size: 64px;
    margin-bottom: 1rem;
    color: #dc3545;
}

.error-title {
    color: #dc3545;
    margin-bottom: 1rem;
}

.error-lead {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.panel-muted .text-muted-sm {
    margin-top: 1rem;
}

.hidden {
    display: none;
}

/* Responsive nav */
@media (max-width: 800px) {
    nav#mainNav {
        display: none;
        flex-direction: column;
        background: #fff;
        position: absolute;
        top: var(--header-height);
        right: 0;
        width: 200px;
        box-shadow: var(--shadow-md);
        z-index: 2000;
    }

    nav#mainNav.open {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    header > div {
        position: relative;
        z-index: 1002;
    }

    nav#mainNav a {
        padding: 1em;
        border-bottom: 1px solid #eee;
        color: #222;
        background: transparent;
        text-decoration: none;
        display: block;
        margin-left: 0;
    }

    nav#mainNav a:focus-visible {
        outline: 2px solid var(--color-primary);
        outline-offset: -2px;
    }

    .hero h1 {
        font-size: 2rem;
    }

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