/* ==========================================================================
   Causey Audio - site header, primary nav, Software dropdown
   ========================================================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
}

.site-header-inner {
    max-width: var(--page-max);
    margin: 0 auto;
    padding: 0.85rem var(--gutter);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

/* Brand ------------------------------------------------------------------ */

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    flex-shrink: 0;
}

/* The real Causey Audio logo. Served at 128x79 and drawn at 52x32 so it stays
   sharp on high-DPI screens. Height is fixed and width follows, because the
   mark is 1.62:1 - forcing it square would squash the letterforms. */
.brand-logo {
    display: block;
    height: 32px;
    width: auto;
    flex-shrink: 0;
}

/* Fallback for any page still using the old text mark. */
.brand-mark {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 800;
    flex-shrink: 0;
}

.brand small {
    display: block;
    color: var(--muted);
    font-size: 0.68rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.18em;
}

/* Mobile toggle ---------------------------------------------------------- */

.nav-toggle {
    display: none;
    align-items: center;
    gap: 0.5rem;
    font: inherit;
    font-weight: 600;
    font-size: 0.9rem;
    background: #ffffff;
    color: var(--text);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-pill);
    padding: 0.5rem 0.9rem;
    cursor: pointer;
}

.nav-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.nav-toggle-bars {
    display: inline-flex;
    flex-direction: column;
    justify-content: space-between;
    width: 16px;
    height: 11px;
}

.nav-toggle-bars span {
    display: block;
    height: 1.5px;
    background: var(--text);
    border-radius: 2px;
}

/* Primary nav ------------------------------------------------------------ */

.site-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.site-nav > * { position: relative; }

.site-nav a,
.nav-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font: inherit;
    font-size: 0.95rem;
    padding: 0.55rem 0.9rem;
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
    white-space: nowrap;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.nav-trigger:hover,
.nav-trigger:focus-visible,
.nav-item.open > .nav-trigger {
    background: rgba(17, 17, 17, 0.04);
    color: var(--text);
    border-color: var(--line);
    outline: none;
}

/* Current page marker */
.site-nav a[aria-current="page"] {
    color: var(--text);
    font-weight: 600;
    border-color: var(--line);
    background: rgba(17, 17, 17, 0.04);
}

/* Caret on the Software trigger */
.nav-caret {
    width: 8px;
    height: 8px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: translateY(-2px) rotate(45deg);
    transition: transform 180ms ease;
}

.nav-item.open .nav-caret { transform: translateY(1px) rotate(-135deg); }

/* Dropdown --------------------------------------------------------------- */

.nav-menu {
    position: absolute;
    top: calc(100% + 0.45rem);
    left: 0;
    min-width: 260px;
    margin: 0;
    padding: 0.4rem 0;
    list-style: none;
    background: #ffffff;
    border: 1px solid var(--line-strong);
    border-radius: 10px;
    box-shadow: 0 12px 28px rgba(17, 17, 17, 0.10);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity 150ms ease, transform 150ms ease, visibility 150ms;
    z-index: 1100;
}

.nav-item.open > .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-menu li + li { border-top: 1px solid var(--line); }

.nav-menu a {
    display: block;
    width: 100%;
    padding: 0.7rem 1rem;
    border-radius: 0;
    border: 0;
    color: var(--text);
    font-weight: 600;
    font-size: 0.95rem;
    white-space: normal;
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
    background: var(--bg-soft);
    border: 0;
    color: var(--text);
}

.nav-menu a small {
    display: block;
    font-weight: 400;
    font-size: 0.82rem;
    color: var(--muted);
    margin-top: 0.1rem;
}

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

@media (max-width: 860px) {
    .site-header-inner { flex-wrap: wrap; }

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

    .site-nav {
        display: none;
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        gap: 0;
        padding-bottom: 0.5rem;
    }

    .site-nav.open { display: flex; }

    .site-nav > * { border-top: 1px solid var(--line); }

    .site-nav a,
    .nav-trigger {
        width: 100%;
        justify-content: space-between;
        border-radius: 0;
        padding: 0.85rem 0.25rem;
    }

    .site-nav a:hover,
    .nav-trigger:hover,
    .nav-item.open > .nav-trigger,
    .site-nav a[aria-current="page"] {
        background: transparent;
        border-color: transparent;
        border-top-color: var(--line);
    }

    /* On mobile the dropdown becomes an inline, indented list. */
    .nav-menu {
        position: static;
        min-width: 0;
        border: 0;
        border-radius: 0;
        box-shadow: none;
        padding: 0 0 0.4rem 1rem;
        display: none;
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    .nav-item.open > .nav-menu { display: block; }
    .nav-menu li + li { border-top: 0; }
    .nav-menu a { padding: 0.6rem 0.25rem; }
}