/* ========== Header / Navbar — Devolim ========== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-header);
    transition: all 0.4s var(--ease-out);
    background: transparent;
}

.header.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(var(--primary-rgb), 0.1);
}

.nav-container {
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 1rem var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    z-index: calc(var(--z-header) + 5);
}

.logo-img {
    width: 55px;
    height: 55px;
    object-fit: contain;
    transition: all 0.4s var(--ease-bounce);
    filter: drop-shadow(0 2px 8px rgba(var(--primary-rgb), 0.3));
}

.logo-wrapper:hover .logo-img {
    transform: rotate(10deg) scale(1.05);
    filter: drop-shadow(0 4px 15px rgba(var(--primary-rgb), 0.5));
}

.header.scrolled .logo-img {
    width: 45px;
    height: 45px;
}

/* Desktop Nav */
.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
}

/* Underline slide */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s var(--ease-out);
    border-radius: 2px;
}

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

.nav-link:hover {
    color: var(--white);
}

.nav-link.active {
    color: var(--white);
}

/* CTA Nav */
.nav-cta {
    margin-left: 1.5rem;
}

.nav-cta .btn-primary {
    padding: 0.7rem 1.6rem;
    font-size: 0.85rem;
}

/* ---- Burger Menu ---- */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 30px;
    height: 30px;
    cursor: pointer;
    z-index: calc(var(--z-overlay) + 5);
    position: relative;
}

.burger-line {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all 0.3s var(--ease-out);
}

.mobile-menu-toggle.active .burger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active .burger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active .burger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ---- Mobile Nav ---- */
.mobile-nav {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.97);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    z-index: var(--z-overlay);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s var(--ease-out);
}

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

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.mobile-nav-links a {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
    color: var(--white);
    background: rgba(var(--primary-rgb), 0.1);
}

.mobile-nav-links .btn-primary {
    margin-top: 1.5rem;
}

/* Overlay */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    visibility: hidden;
    z-index: calc(var(--z-overlay) - 1);
    transition: all 0.3s ease;
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .nav-links {
        display: none;
    }

    .nav-cta {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }
}