/* ============================================================
   Header — Clean white, geometric logo mark, cyan hover
   accents. Technical and precise.
   ============================================================ */

.header {
    background-color: var(--color-header_bg);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    position: relative;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.logo {
    font-family: var(--font-heading), system-ui, sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-decoration: none;
    color: var(--color-text);
}

.logo:hover {
    color: var(--color-accent);
}

.logo-img {
    max-height: 2.5rem;
    width: auto;
}

/* --- Hamburger --- */

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: transform 0.2s;
}

/* --- Nav — mobile dropdown --- */

.nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-background);
    flex-direction: column;
    padding: 1rem 1.25rem 1.5rem;
    z-index: 100;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    border-top: 1px solid rgba(0,0,0,0.06);
}

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

.nav-menu a {
    color: var(--color-text);
    padding: 0.75rem 0;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    border-bottom: 1px solid rgba(0,0,0,0.06);
    text-decoration: none;
}

.nav-menu a:hover {
    color: var(--color-accent);
}

.nav-phone {
    color: var(--color-accent) !important;
    border-bottom: none !important;
    margin-top: 0.5rem;
    font-weight: 600 !important;
    font-size: 0.9375rem !important;
}

/* --- Desktop nav --- */

@media (min-width: 768px) {
    .header-inner {
        padding-top: 1.25rem;
        padding-bottom: 1.25rem;
    }

    .nav-toggle {
        display: none;
    }

    .nav-menu {
        display: flex;
        position: static;
        flex-direction: row;
        align-items: center;
        gap: 2rem;
        padding: 0;
        background: none;
        box-shadow: none;
        border-top: none;
    }

    .nav-menu a {
        padding: 0;
        border-bottom: none;
        position: relative;
    }

    .nav-menu a::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: -4px;
        width: 0;
        height: 2px;
        background: var(--color-accent);
        border-radius: 1px;
        transition: width 0.2s;
    }

    .nav-menu a:hover::after {
        width: 100%;
    }

    .nav-phone {
        margin-top: 0;
        margin-left: 0.5rem;
        background: color-mix(in srgb, var(--color-accent) 10%, transparent);
        padding: 0.375rem 0.875rem !important;
        border-radius: 4px;
    }

    .nav-phone::after {
        display: none;
    }
}