/* ══════════════════════════════════════════════
   Shared Navigation — CushLabs AI Services
   All pages use CushLabs orange brand colors.
   ══════════════════════════════════════════════ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 9;
    background: rgba(5, 5, 5, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: background 0.3s;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-family: "Space Grotesk", sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: #FAFAFA;
    text-decoration: none;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-brand-icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    object-fit: contain;
}

.nav-brand span {
    color: #FF6A3D;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    font-family: "Space Grotesk", sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    color: #D4D8DE;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.nav-active {
    color: #FF6A3D;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

/* ── Language toggle ── */
.lang-toggle {
    font-family: "Space Grotesk", sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: #D4D8DE;
    background: rgba(10, 10, 12, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.4rem 0.9rem;
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    text-transform: uppercase;
}

.lang-toggle:hover {
    color: #FF6A3D;
    border-color: #FF6A3D;
    background: rgba(255, 106, 61, 0.08);
}

/* ── Theme toggle (portfolio) ── */
.theme-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #FAFAFA;
    transition: all 0.3s;
    width: 36px;
    height: 36px;
}

.theme-btn:hover {
    background: rgba(255, 255, 255, 0.12);
}

.theme-btn svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

:root.light-theme .sun-icon {
    display: block;
}

:root.light-theme .moon-icon {
    display: none;
}

/* ── Hamburger ── */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger svg {
    width: 24px;
    height: 24px;
    fill: #FAFAFA;
    transition: fill 0.3s;
}

.hamburger:hover svg {
    fill: #FF6A3D;
}

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

.dropdown-trigger {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.dropdown-trigger svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
    transition: transform 0.3s;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    padding-top: 0.75rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(10, 10, 12, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    min-width: 240px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    list-style: none;
}

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

.nav-dropdown:hover .dropdown-trigger svg {
    transform: rotate(180deg);
}

.dropdown-menu a {
    display: block;
    padding: 0.65rem 1.25rem;
    font-family: "Space Grotesk", sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    text-transform: none;
    letter-spacing: 0;
    transition: all 0.2s;
}

.dropdown-menu a:hover {
    color: #FF6A3D;
    background: rgba(255, 255, 255, 0.04);
}

/* ── Portfolio light-theme overrides ── */
:root.light-theme .nav {
    background: rgba(248, 250, 252, 0.8) !important;
}

:root.light-theme .nav-brand {
    color: #0F172A;
}

:root.light-theme .nav-links a {
    color: #1E293B;
}

:root.light-theme .nav-links a:hover,
:root.light-theme .nav-links a.nav-active {
    color: #FF6A3D;
}

:root.light-theme .hamburger svg {
    fill: #0F172A;
}

:root.light-theme .theme-btn {
    color: #0F172A;
    border-color: rgba(0, 0, 0, 0.08);
}

:root.light-theme .theme-btn:hover {
    background: rgba(0, 0, 0, 0.06);
}

:root.light-theme .dropdown-menu {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(0, 0, 0, 0.08);
}

:root.light-theme .dropdown-menu a {
    color: rgba(0, 0, 0, 0.6);
}

:root.light-theme .dropdown-menu a:hover {
    color: #FF6A3D;
    background: rgba(0, 0, 0, 0.03);
}

/* ── Mobile responsive (768px) ── */
@media (max-width: 768px) {
    .nav-container {
        padding: 1rem 1.5rem;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(5, 5, 5, 0.97);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2.5rem;
        z-index: 100;
        padding: 2rem;
    }

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

    .nav-links a {
        font-size: 1.3rem;
        letter-spacing: 0.15em;
    }

    .hamburger {
        display: flex;
        align-items: center;
    }

    .nav-controls {
        gap: 1rem;
    }

    .nav-dropdown > .dropdown-trigger {
        display: none;
    }

    .dropdown-menu {
        display: flex !important;
        position: static;
        transform: none;
        background: none !important;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        border: none !important;
        box-shadow: none;
        border-radius: 0;
        flex-direction: column;
        align-items: center;
        gap: 2rem;
        padding: 0;
        min-width: auto;
    }

    .dropdown-menu a {
        padding: 0;
        font-size: 1.1rem;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        color: #D4D8DE !important;
    }

    .dropdown-menu a:hover {
        background: none !important;
        color: #FF6A3D !important;
    }
}