/* ==========================================
   Shared navigation — included on all pages
   ========================================== */

:root {
    --color-primary:       #1a2a4a;
    --color-primary-light: #2c4a7c;
    --color-text-light:    #64748b;
    --color-bg:            #ffffff;
    --color-bg-alt:        #f8fafc;
    --color-border:        #e2e8f0;
    --color-text:          #2d3748;
    --nav-height:          64px;
    --transition:          0.3s ease;
}

/* ── Reset helpers ───────────────────────── */
.navbar, .navbar * { box-sizing: border-box; }
.navbar a { text-decoration: none; color: inherit; }
.navbar ul { list-style: none; margin: 0; padding: 0; }

/* ── Bar ─────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-height);
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: box-shadow var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 1px 8px rgba(0,0,0,0.08);
}

.nav-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ── Logo ────────────────────────────────── */
.nav-logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
    letter-spacing: 0.02em;
}

/* ── Menu ────────────────────────────────── */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

/* ── Links ───────────────────────────────── */
.nav-link {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-text-light);
    transition: color var(--transition);
    position: relative;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    font-family: inherit;
    line-height: inherit;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0; right: 0;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform var(--transition);
}

/* underline origin follows reading direction */
html[dir="rtl"] .nav-link::after { transform-origin: right; }
html[dir="ltr"] .nav-link::after { transform-origin: left; }

/* buttons (dropdown trigger) have no underline pseudo-element */
button.nav-link::after { display: none; }

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

/* ── Language toggle ─────────────────────── */
.lang-toggle {
    background: var(--color-primary);
    color: #fff;
    border: none;
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
    font-family: 'Inter', sans-serif;
    letter-spacing: 0.05em;
}

.lang-toggle:hover {
    background: var(--color-primary-light);
    transform: translateY(-1px);
}

/* ── Hamburger ───────────────────────────── */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.active span:nth-child(1) { transform: translateY(7px)  rotate(45deg);  }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Dropdown ────────────────────────────── */
.nav-item-dropdown { position: relative; }

.dropdown-arrow {
    flex-shrink: 0;
    transition: transform var(--transition);
}

.nav-item-dropdown.open .dropdown-arrow { transform: rotate(180deg); }
.nav-item-dropdown.open > .nav-link    { color: var(--color-primary); }

.dropdown-menu {
    position: absolute;
    top: calc(100% + 14px);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    box-shadow: 0 6px 24px rgba(0,0,0,0.10);
    min-width: 168px;
    padding: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
    z-index: 200;
}

html[dir="rtl"] .dropdown-menu { right: 0; left: auto; }
html[dir="ltr"] .dropdown-menu { left: 0; right: auto; }

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

.dropdown-link {
    display: block;
    padding: 8px 12px;
    font-size: 0.875rem;
    color: var(--color-text-light);
    border-radius: 6px;
    transition: color var(--transition), background var(--transition);
}

.dropdown-link:hover {
    color: var(--color-primary);
    background: var(--color-bg-alt);
}

.dropdown-link.active {
    color: var(--color-primary);
    font-weight: 600;
}

/* ── Mobile ──────────────────────────────── */
@media (max-width: 768px) {
    .navbar {
        background: #ffffff;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    .nav-toggle { display: flex; }

    .nav-menu {
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: #ffffff;
        z-index: 998;
        flex-direction: column;
        justify-content: center;
        gap: 32px;
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition), visibility var(--transition);
    }

    .nav-menu.open { opacity: 1; visibility: visible; }

    .nav-link { font-size: 1.25rem; }

    button.nav-link { font-size: 1.25rem; justify-content: center; }

    /* dropdown expands inline on mobile */
    .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        background: none;
        padding: 0;
        min-width: 0;
        border-radius: 0;
        opacity: 1;
        visibility: visible;
        transform: none;
        transition: none;
        display: none;
    }

    .nav-item-dropdown.open .dropdown-menu {
        display: flex;
        flex-direction: column;
        gap: 10px;
        margin-top: 8px;
    }

    .dropdown-link {
        font-size: 1rem;
        text-align: center;
        padding: 4px 0;
        border-radius: 0;
    }
}