/* ── Base & Reset ── */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    overflow-x: hidden;
}

img {
    display: block;
    max-width: 100%;
}

/* ── Navbar Transition ── */
#navbar.scrolled {
    background: rgba(246, 246, 246, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: currentColor;
    transition: width 0.3s ease;
}

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

/* ── Hero ── */
.hero-gradient {
    background: linear-gradient(135deg, #3d3d3d 0%, #1a1a1a 40%, #2a2a2a 70%, #3d3d3d 100%);
}

.hero-image {
    opacity: 0.35;
    transition: transform 8s ease;
}

#hero:hover .hero-image {
    transform: scale(1.02);
}

.hero-scrim {
    background: linear-gradient(
        to bottom,
        rgba(26, 26, 26, 0.4) 0%,
        rgba(26, 26, 26, 0.2) 40%,
        rgba(26, 26, 26, 0.3) 70%,
        rgba(26, 26, 26, 0.7) 100%
    );
}

.hero-headline {
    opacity: 1;
    animation: heroFadeUp 1s ease forwards;
}

.hero-subtitle {
    opacity: 1;
    animation: heroFadeUp 1s ease 0.2s forwards;
    opacity: 0;
}

.hero-desc {
    opacity: 1;
    animation: heroFadeUp 1s ease 0.4s forwards;
    opacity: 0;
}

.hero-cta {
    opacity: 1;
    animation: heroFadeUp 1s ease 0.6s forwards;
    opacity: 0;
}

@keyframes heroFadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-scroll-indicator {
    opacity: 1;
    animation: heroFadeUp 1s ease 1s forwards;
    opacity: 0;
}

/* ── Scroll Reveal ── */
.reveal-up,
.reveal-left,
.reveal-right {
    opacity: 1;
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal-left {
    transform: translateX(0);
}

.reveal-right {
    transform: translateX(0);
}

.reveal-up {
    transform: translateY(0);
}

@media (prefers-reduced-motion: no-preference) {
    .reveal-up.is-hidden,
    .reveal-left.is-hidden,
    .reveal-right.is-hidden {
        opacity: 0;
    }

    .reveal-left.is-hidden {
        transform: translateX(-40px);
    }

    .reveal-right.is-hidden {
        transform: translateX(40px);
    }

    .reveal-up.is-hidden {
        transform: translateY(40px);
    }
}

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

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

.mobile-link {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
}

#mobile-menu.closed .mobile-link {
    opacity: 0;
    transform: translateY(20px);
}

#mobile-menu.closed .mobile-link:nth-child(1) { transition-delay: 0s; }
#mobile-menu.closed .mobile-link:nth-child(2) { transition-delay: 0.05s; }
#mobile-menu.closed .mobile-link:nth-child(3) { transition-delay: 0.1s; }
#mobile-menu.closed .mobile-link:nth-child(4) { transition-delay: 0.15s; }
#mobile-menu.closed .mobile-link:nth-child(5) { transition-delay: 0.2s; }

#mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
#mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }
#mobile-menu.open .mobile-link:nth-child(5) { transition-delay: 0.3s; }

/* ── Menu Lines Animation ── */
.menu-line {
    transition: transform 0.3s ease, opacity 0.3s ease;
}

#menu-toggle.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

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

#menu-toggle.active .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
    width: 1.5rem;
}

/* ── Custom Scrollbar ── */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f6f6f6;
}

::-webkit-scrollbar-thumb {
    background: #b0b0b0;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #888888;
}

/* ── Selection ── */
::selection {
    background: rgba(232, 115, 90, 0.2);
    color: #2a2a2a;
}