/* ─── Base & Typography ─── */
html {
    scroll-behavior: smooth;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background-color: rgba(212, 168, 50, 0.25);
    color: #f0f2f8;
}

/* ─── Navigation ─── */
#site-header.scrolled {
    background-color: rgba(8, 10, 24, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(212, 168, 50, 0.08);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: #d4a832;
    transition: width 0.3s ease;
}

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

/* ─── Mobile Menu ─── */
#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}

#mobile-menu.closed {
    opacity: 0;
    pointer-events: none;
}

.burger-line {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#menu-toggle.active .burger-line:nth-child(1) {
    transform: translateY(5px) rotate(45deg);
}

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

#menu-toggle.active .burger-line:nth-child(3) {
    transform: translateY(-5px) rotate(-45deg);
    width: 1.25rem;
}

.mobile-link {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

#mobile-menu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
}

#mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.2s; }
#mobile-menu.open .mobile-link:nth-child(5) { transition-delay: 0.25s; }

/* ─── Menu Tabs ─── */
.menu-tab {
    color: #b0b9cf;
    background: transparent;
}

.menu-tab.active {
    color: #182040;
    background: #d4a832;
    box-shadow: 0 2px 12px rgba(212, 168, 50, 0.3);
}

/* ─── Menu Items ─── */
.menu-item {
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(58, 79, 138, 0.3);
    animation: fadeSlideUp 0.4s ease forwards;
    opacity: 0;
}

.menu-item:nth-child(1) { animation-delay: 0.05s; }
.menu-item:nth-child(2) { animation-delay: 0.1s; }
.menu-item:nth-child(3) { animation-delay: 0.15s; }
.menu-item:nth-child(4) { animation-delay: 0.2s; }
.menu-item:nth-child(5) { animation-delay: 0.25s; }
.menu-item:nth-child(6) { animation-delay: 0.3s; }

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─── Scroll Reveal (below fold only) ─── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }

    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fallback: always visible if JS disabled or reduced motion */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* ─── Form ─── */
#contact-form input:focus,
#contact-form textarea:focus {
    box-shadow: 0 0 0 3px rgba(212, 168, 50, 0.1);
}

/* ─── Utility ─── */
.menu-panel {
    animation: panelFade 0.35s ease forwards;
}

@keyframes panelFade {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}