/* Beacon — Global styles
   Palette: slate/sky (research institute, not startup) */

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

/* ---- Base ---- */
html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.7;
    color: #1a1a1a;
    background: #fafafa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
    width: 100%;
}

a { color: #0369a1; text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ---- Typography ---- */
h1, h2, h3, h4 {
    color: #0f172a;
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

h1 { font-size: 2.25rem; margin-bottom: 1rem; }
h2 { font-size: 1.5rem; margin-top: 2.5rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.2rem; margin-top: 1.5rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1rem; }

ul, ol { margin-bottom: 1rem; padding-left: 1.5rem; }
li { margin-bottom: 0.35rem; }

/* ---- Navigation ---- */
.site-nav {
    background: #0f172a;
    color: #e2e8f0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid #1e293b;
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    color: #f8fafc;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    padding: 1rem 0;
    text-decoration: none;
}
.nav-logo:hover { text-decoration: none; color: #bae6fd; }

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: #e2e8f0;
    margin: 5px 0;
    transition: 0.2s;
}

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

.nav-item { position: relative; }

.nav-item > a {
    display: block;
    padding: 1rem 0.85rem;
    color: #cbd5e1;
    font-size: 0.9rem;
    text-decoration: none;
    transition: color 0.15s;
}
.nav-item > a:hover,
.nav-item.current > a {
    color: #f8fafc;
    text-decoration: none;
}

.nav-item.current > a {
    border-bottom: 2px solid #38bdf8;
}

/* Dropdowns */
.nav-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #1e293b;
    min-width: 240px;
    list-style: none;
    padding: 0.5rem 0;
    margin: 0;
    border-radius: 0 0 6px 6px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.has-dropdown:hover .nav-dropdown {
    display: block;
}

.nav-dropdown li a {
    display: block;
    padding: 0.6rem 1.25rem;
    color: #cbd5e1;
    font-size: 0.85rem;
    text-decoration: none;
    transition: background 0.15s;
}
.nav-dropdown li a:hover {
    background: #334155;
    color: #f8fafc;
    text-decoration: none;
}
.nav-dropdown li a[aria-current="page"] {
    color: #38bdf8;
}

/* ---- Page Header ---- */
.page-header {
    background: #f1f5f9;
    border-bottom: 1px solid #e2e8f0;
    padding: 3rem 1.5rem 2.5rem;
    text-align: center;
}

.page-header h1 {
    font-size: 2.25rem;
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: #475569;
    font-size: 1.1rem;
    max-width: 650px;
    margin: 0 auto;
}

/* ---- Content ---- */
.content {
    max-width: 800px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 4rem;
}

.content-wide {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 4rem;
}

/* ---- Home Page ---- */
.hero {
    background: #f1f5f9;
    border-bottom: 1px solid #e2e8f0;
    padding: 3rem 1.5rem 2.5rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.75rem;
    margin-bottom: 0.5rem;
}

.hero .tagline {
    font-size: 1.2rem;
    color: #475569;
    max-width: 650px;
    margin: 0 auto 1.25rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.btn {
    display: inline-block;
    padding: 0.7rem 1.75rem;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
}

.btn-primary {
    background: #0369a1;
    color: #fff;
}
.btn-primary:hover { background: #075985; text-decoration: none; color: #fff; }

.btn-secondary {
    background: #e2e8f0;
    color: #0f172a;
}
.btn-secondary:hover { background: #cbd5e1; text-decoration: none; }

.home-section {
    max-width: 1000px;
    margin: 0 auto;
    padding: 1.75rem 1.5rem;
}

.home-section + .home-section {
    border-top: 1px solid #e2e8f0;
}

.trust-signals {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.trust-signal {
    flex: 1;
    min-width: 200px;
    padding: 1rem;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
}

.trust-signal h3 {
    font-size: 0.9rem;
    color: #475569;
    margin-top: 0;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ---- Placeholder / Coming Soon ---- */
.placeholder {
    background: #f8fafc;
    border: 2px dashed #cbd5e1;
    border-radius: 8px;
    padding: 2rem;
    margin: 1.5rem 0;
    text-align: center;
    color: #64748b;
}

.placeholder p {
    margin-bottom: 0.5rem;
}

.placeholder .badge {
    display: inline-block;
    padding: 0.3rem 0.75rem;
    background: #e0f2fe;
    color: #0369a1;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

/* ---- Section index pages ---- */
.section-links {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0;
}

.section-links li {
    margin-bottom: 0;
}

.section-links a {
    display: block;
    padding: 1.25rem 1.5rem;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    margin-bottom: 0.75rem;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.section-links a:hover {
    border-color: #0369a1;
    box-shadow: 0 2px 8px rgba(3, 105, 161, 0.08);
    text-decoration: none;
}

.section-links .link-title {
    font-weight: 600;
    color: #0f172a;
    display: block;
}

.section-links .link-desc {
    color: #64748b;
    font-size: 0.9rem;
    margin-top: 0.25rem;
    display: block;
}

/* ---- Contact / Forms ---- */
.contact-info {
    margin: 1.5rem 0;
}

.contact-info dt {
    font-weight: 600;
    color: #0f172a;
    margin-top: 1rem;
}

.contact-info dd {
    color: #475569;
    margin-left: 0;
}

/* ---- Contact Form ---- */
.contact-form {
    margin: 1.5rem 0;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: #0f172a;
    margin-bottom: 0.35rem;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
    line-height: 1.5;
    color: #1a1a1a;
    background: #fff;
    transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #0369a1;
    box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.form-hp {
    position: absolute;
    left: -9999px;
    height: 0;
    overflow: hidden;
}

.contact-form .btn {
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.form-status {
    padding: 1rem 1.25rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.form-status.success {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #166534;
}

.form-status.error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

/* ---- Tables ---- */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

th {
    background: #f1f5f9;
    font-weight: 600;
    color: #0f172a;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ---- Footer ---- */
.site-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 2.5rem 1.5rem 1.5rem;
    margin-top: auto;
}

.footer-container {
    max-width: 1100px;
    margin: 0 auto;
}

.footer-main {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #1e293b;
}

.footer-name {
    color: #e2e8f0;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.footer-status {
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
}

.footer-contact {
    font-size: 0.85rem;
}

.footer-contact a {
    color: #38bdf8;
}

.footer-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 0.4rem;
}

.footer-links a {
    color: #94a3b8;
    font-size: 0.85rem;
}
.footer-links a:hover { color: #e2e8f0; }

.footer-bottom {
    padding-top: 1.25rem;
    font-size: 0.8rem;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .nav-toggle { display: block; }

    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #0f172a;
        border-top: 1px solid #1e293b;
        padding: 0.5rem 0;
    }
    .nav-menu.open { display: flex; }

    .nav-item > a { padding: 0.75rem 1.5rem; }

    .nav-dropdown {
        position: static;
        box-shadow: none;
        border-radius: 0;
        background: #0f172a;
        padding-left: 1rem;
    }
    .has-dropdown:hover .nav-dropdown,
    .has-dropdown .nav-dropdown { display: block; }

    .hero { padding: 2rem 1.5rem 1.75rem; }
    .hero h1 { font-size: 2rem; }

    .page-header { padding: 2rem 1.5rem 1.5rem; }
    .page-header h1 { font-size: 1.75rem; }

    .footer-main { flex-direction: column; }
    .trust-signals { flex-direction: column; }
}