/* =============================================================================
   shared.css  -  Edge of Signal Labs design system
   ============================================================================= */

/* -- Design tokens ---------------------------------------------------------- */
:root {
    --bg-primary: #08090a;
    --bg-card: #0d0e10;
    --bg-card-hover: #121316;
    --border: #1a1d21;
    --border-active: #2a2f36;
    --text-primary: #e8e8e8;
    --text-secondary: #8a8f98;
    --text-muted: #4a4f58;

    --signal-green: #3d9970;
    --signal-green-dim: #2a6b4f;
    --signal-red: #cc4444;
    --signal-red-dim: #8b3030;
    --signal-amber: #c9943a;
    --signal-blue: #5a7fb8;

    --font-main: 'Quantico', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    font-size: 14px;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    opacity: 0.015;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* -- Layout ----------------------------------------------------------------- */
.container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

/* -- Animations ------------------------------------------------------------- */
@keyframes pulse-slow {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

/* -- Base links ------------------------------------------------------------- */
a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--text-secondary);
}

/* -- Typography helpers ----------------------------------------------------- */
.tagline {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 400;
}

.section-heading {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* -- Navigation ------------------------------------------------------------- */
.site-nav-wrap {
    border-bottom: 1px solid var(--border);
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 900px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
}

.nav-logo {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: color 0.2s;
}

.nav-logo::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--signal-green);
    border-radius: 50%;
    animation: pulse-slow 3s ease-in-out infinite;
    flex-shrink: 0;
}

.nav-logo:hover {
    color: var(--text-secondary);
}

.nav-links {
    display: flex;
    gap: 1.75rem;
}

.nav-links a {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

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

.nav-links a.active {
    color: var(--signal-green);
}

/* -- Cards ------------------------------------------------------------------ */
.card {
    background: var(--bg-card);
    padding: 1.5rem;
    transition: background 0.2s ease;
}

.card:hover {
    background: var(--bg-card-hover);
}

.card-title {
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--text-primary);
    margin-bottom: 0.6rem;
}

.card-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

/* -- Status badges ---------------------------------------------------------- */
.status-badge {
    display: inline-block;
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    padding: 0.2rem 0.5rem;
    border: 1px solid;
}

.status-live {
    color: var(--signal-green);
    border-color: var(--signal-green-dim);
}

.status-active {
    color: var(--signal-amber);
    border-color: var(--signal-amber);
}

.status-experimental {
    color: var(--text-secondary);
    border-color: var(--border-active);
}

/* -- Buttons ---------------------------------------------------------------- */
.btn {
    display: inline-block;
    font-family: var(--font-main);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    padding: 0.55rem 1.25rem;
    border: 1px solid var(--border-active);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    text-decoration: none;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.02);
}

.btn-primary {
    border-color: var(--signal-green-dim);
    color: var(--signal-green);
}

.btn-primary:hover {
    background: rgba(61, 153, 112, 0.08);
    color: var(--signal-green);
    border-color: var(--signal-green);
}

/* -- Footer ----------------------------------------------------------------- */
.site-footer {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 2rem 3rem;
    border-top: 1px solid var(--border);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.footer-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.footer-brand {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--text-muted);
}

.footer-links-row {
    display: flex;
    gap: 1.25rem;
}

.footer-links-row a {
    font-size: 0.7rem;
    letter-spacing: 0.05em;
}

.footer-closing {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 600px;
    margin-bottom: 1.25rem;
}

.footer-disclaimer {
    font-size: 0.65rem;
    color: var(--text-muted);
    opacity: 0.6;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

/* -- Responsive ------------------------------------------------------------- */
@media (max-width: 700px) {
    .container {
        padding: 2rem 1.25rem;
    }

    .site-nav {
        padding: 1rem 1.25rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-links a {
        font-size: 0.62rem;
    }

    .site-footer {
        padding: 2rem 1.25rem 2.5rem;
    }

    .footer-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}