/* =====================================================
   DEEP SELF: Header Component
   Site header and navigation
   NO !important - uses proper specificity and layers
   ===================================================== */

/* ===== SITE HEADER ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    background: var(--black);
    border-bottom: 1px solid var(--grey-dark);
    padding: 1rem 2rem;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    gap: var(--spacing-md);
}

.header-logo {
    height: 24px;
    width: auto;
    flex-shrink: 0;
}

/* ===== NAVIGATION ===== */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--cream);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.5rem 0.75rem;
    opacity: 0.85;
    transition: color var(--transition-fast), opacity var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--green);
    opacity: 1;
}

.nav-divider {
    width: 1px;
    height: 16px;
    background: var(--grey-dark);
    margin: 0 0.5rem;
}

/* ===== DROPDOWN ===== */
.nav-dropdown {
    position: relative;
    display: inline-block;
}

.nav-dropdown::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 1.25rem;
    background: transparent;
    display: none;
    z-index: 1000;
}

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

.nav-dropdown > .nav-link::after {
    content: '▾';
    font-size: 0.6rem;
    margin-left: 0.25rem;
    opacity: 0.6;
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 1.25rem);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(22, 22, 22, 0.98);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(42, 42, 42, 0.6);
    border-radius: 6px;
    min-width: 160px;
    padding: 0.75rem 0;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.nav-dropdown:hover .nav-dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
}

.nav-dropdown-link {
    display: block;
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--cream);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.65rem 1rem;
    opacity: 0.85;
    transition: color var(--transition-fast), background var(--transition-fast), opacity var(--transition-fast);
}

.nav-dropdown-link:hover {
    color: var(--green);
    opacity: 1;
    background: rgba(0, 245, 160, 0.08);
}

/* ===== HEADER BUTTON ===== */
.header-button {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--cream);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.4rem 0.75rem;
    border: 1px solid rgba(154, 154, 154, 0.35);
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.header-button:hover {
    border-color: var(--green);
    color: var(--green);
}

/* ===== HEADER CTA ===== */
.header-cta {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--green);
    text-decoration: none;
}

/* ===== HAMBURGER ===== */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger__line {
    width: 100%;
    height: 2px;
    background: var(--cream);
    transition: transform var(--transition-medium), opacity var(--transition-medium);
}

.hamburger.active .hamburger__line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .hamburger__line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger__line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ===== MOBILE MENU ===== */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--black);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu__inner {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 80px 2rem 4rem;
    height: 100%;
    overflow-y: auto;
}

.mobile-menu__section {
    margin-bottom: 2rem;
    width: 100%;
}

.mobile-menu__label {
    font-family: var(--font-family);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--grey);
    margin-bottom: 0.5rem;
    display: block;
}

.mobile-menu__link {
    font-family: var(--font-family);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--cream);
    text-decoration: none;
    padding: 0.6rem 0;
    display: block;
    transition: color 0.2s ease;
    border-bottom: 1px solid var(--grey-dark);
}

.mobile-menu__link:last-child {
    border-bottom: none;
}

.mobile-menu__link:hover,
.mobile-menu__link:active {
    color: var(--green);
}

.mobile-menu__link--accent {
    color: var(--green);
}

.mobile-menu__link--email {
    font-size: 0.9rem;
    color: var(--green);
    border-bottom: none;
    padding-top: 1rem;
}

/* =====================================================
   MOBILE STYLES (max-width: 767px)
   Uses higher specificity via attribute selector
   ===================================================== */

@media (max-width: 767px) {
    /* Header adjustments */
    .site-header {
        padding: 0.75rem 1rem;
    }

    .header-logo {
        height: 20px;
    }

    /* Hide desktop nav */
    .nav-menu {
        display: none;
    }

    .header-cta {
        display: none;
    }

    /* Show hamburger */
    .hamburger {
        display: flex;
    }

    /* Enable mobile menu */
    .mobile-menu {
        display: block;
    }
}

/* =====================================================
   The mobile menu, regrouped (2026-08-27):
   Lab / DeepSelf / Harness / Contact — each group ruled
   in its register's colour. Labels are mono apparatus;
   links are clean, no per-link borders.
   ===================================================== */
.mobile-menu__section {
    margin-bottom: 1.7rem;
}

.mobile-menu__label {
    font-family: ui-monospace, 'SF Mono', Consolas, monospace;
    font-size: 0.6rem;
    letter-spacing: 0.3em;
    margin-bottom: 0.55rem;
    padding-bottom: 0.55rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.10);
}

.mobile-menu__label--lab { color: #FF5A00; border-bottom-color: rgba(255, 90, 0, 0.45); }
.mobile-menu__label--ds  { color: #10B981; border-bottom-color: rgba(16, 185, 129, 0.4); }
.mobile-menu__label--ha  { color: #fcee0a; border-bottom-color: rgba(252, 238, 10, 0.35); }

.mobile-menu__link {
    border-bottom: none;
    padding: 0.48rem 0;
    font-size: 1.05rem;
}

.mobile-mio {
    white-space: nowrap;
    font-size: 0.62rem;
    letter-spacing: 0.22em;
}

/* the codices: a sub-group inside DeepSelf */
.mobile-menu__sublabel {
    display: block;
    margin: 0.9rem 0 0.25rem;
    font-family: ui-monospace, 'SF Mono', Consolas, monospace;
    font-size: 0.55rem;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: rgba(16, 185, 129, 0.65);
}

.mobile-menu__link--sub {
    padding-left: 0.9rem;
    border-left: 1px solid rgba(16, 185, 129, 0.3);
    font-size: 0.98rem;
}