/* style sheet */

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

body {
    background: #1a1a1a;
    color: #e0e0e0;
    font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Courier New', monospace;
    line-height: 1.6;
    padding: 2rem 1.5rem;
    max-width: 1100px;
    margin: 0 auto;
}

a {
    color: #d4d4d4;
    text-decoration: none;
    border-bottom: 1px solid #3a3a3a;
    transition: border-color 0.1s ease;
}

a:hover {
    border-bottom-color: #d4d4d4;
}

hr {
    border: none;
    border-top: 2px solid #2a2a2a;
    margin: 2rem 0;
}

/* --------------------------------------------------------------------------
   Header & navigation
   -------------------------------------------------------------------------- */

.hetrix-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    border-bottom: 2px solid #2a2a2a;
    padding-bottom: 1.5rem;
}

.hetrix-header .logo {
    flex-shrink: 0;
}

.hetrix-header .logo img {
    height: 64px;
    width: auto;
    background: #1a1a1a;        /* blends with page background */
    padding: 4px;
    filter: brightness(0.95) contrast(1.1);
    mix-blend-mode: multiply;    /* helps kill white backgrounds */
}

.hetrix-header .site-title h1 {
    font-size: 2.2rem;
    font-weight: 400;
    letter-spacing: -0.5px;
    color: #ffffff;
}

.hetrix-header .site-title p {
    color: #a0a0a0;
    font-size: 1rem;
    margin-top: 0.2rem;
}

.hetrix-nav {
    margin-left: auto;
    display: flex;
    gap: 2rem;
    font-size: 1.1rem;
    flex-wrap: wrap;
}

.hetrix-nav a {
    border-bottom: none;
    padding-bottom: 4px;
}

.hetrix-nav a.active {
    border-bottom: 2px solid #d4d4d4;
}

/* --------------------------------------------------------------------------
   Hero / splash
   -------------------------------------------------------------------------- */

.hetrix-hero {
    background: #202020;
    border-left: 6px solid #d4d4d4;
    padding: 2.5rem 2rem;
    margin-bottom: 3rem;
    box-shadow: 8px 8px 0 #0a0a0a;
}

.hetrix-hero h2 {
    font-size: 2rem;
    font-weight: 350;
    margin-bottom: 1rem;
    color: #ffffff;
}

.hetrix-hero p {
    font-size: 1.2rem;
    max-width: 800px;
    color: #b0b0b0;
}

/* --------------------------------------------------------------------------
   Cards (grid)
   -------------------------------------------------------------------------- */

.hetrix-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.hetrix-card {
    background: #202020;
    padding: 2rem 1.5rem;
    border: 1px solid #2f2f2f;
    transition: background 0.1s ease;
}

.hetrix-card:hover {
    background: #252525;
}

.hetrix-card h3 {
    color: #ffffff;
    font-weight: 400;
    margin-bottom: 1rem;
    border-bottom: 1px solid #3a3a3a;
    padding-bottom: 0.5rem;
}

.hetrix-card ul {
    list-style: none;
}

.hetrix-card li {
    margin-bottom: 0.6rem;
}

.hetrix-card li a::before {
    content: '› ';
    color: #d4d4d4;
    font-weight: bold;
    margin-right: 0.3rem;
}

/* --------------------------------------------------------------------------
   Quick‑links panel
   -------------------------------------------------------------------------- */

.hetrix-quick {
    background: #1d1d1d;
    padding: 2rem;
    border: 1px solid #2a2a2a;
    margin: 3rem 0;
}

.hetrix-quick h3 {
    margin-bottom: 1.2rem;
    color: #ffffff;
    font-weight: 400;
}

.hetrix-flex-links {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem 3rem;
}

.hetrix-flex-links a {
    border-bottom: none;
    background: #2a2a2a;
    padding: 0.3rem 1rem;
    font-size: 0.95rem;
}

.hetrix-flex-links a:hover {
    background: #333;
}

/* --------------------------------------------------------------------------
   Multi‑column lists (used in footer / internals)
   -------------------------------------------------------------------------- */

.hetrix-columns {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: space-between;
    margin: 2rem 0;
}

.hetrix-column {
    flex: 1 1 200px;
}

.hetrix-column h4 {
    color: #ffffff;
    font-weight: 400;
    margin-bottom: 1rem;
}

.hetrix-column ul {
    list-style: none;
}

.hetrix-column li {
    margin-bottom: 0.5rem;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.hetrix-footer {
    margin-top: 5rem;
    padding-top: 2rem;
    border-top: 2px solid #2a2a2a;
    color: #808080;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.hetrix-footer a {
    color: #b0b0b0;
    border-bottom: none;
}

/* --------------------------------------------------------------------------
   404 page specific
   -------------------------------------------------------------------------- */

.hetrix-404-container {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.hetrix-404-code {
    font-size: 8rem;
    font-weight: 300;
    color: #2a2a2a;
    line-height: 1;
    margin-bottom: 1rem;
    letter-spacing: -5px;
}

.hetrix-404-title {
    font-size: 2.5rem;
    font-weight: 350;
    margin-bottom: 1rem;
    color: #d4d4d4;
}

.hetrix-404-text {
    font-size: 1.2rem;
    color: #a0a0a0;
    margin-bottom: 2rem;
}

.hetrix-404-links {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 700px) {
    .hetrix-header {
        flex-direction: column;
        align-items: start;
        gap: 1rem;
    }
    .hetrix-nav {
        margin-left: 0;
    }
    .hetrix-hero {
        padding: 1.5rem;
    }
    .hetrix-404-code {
        font-size: 6rem;
    }
}