*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    overflow-x: hidden;
}

/* ─── Navigation ─── */
#site-header {
    transition: background-color 0.5s ease, backdrop-filter 0.5s ease;
}

#site-header.scrolled {
    background-color: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: #A8E6CF;
    transition: width 0.3s ease;
}

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

/* ─── Mobile Menu ─── */
.mobile-menu {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.mobile-menu.open {
    opacity: 1 !important;
    pointer-events: all !important;
}

.mobile-menu-link {
    position: relative;
}

.mobile-menu-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 1px;
    background-color: #A8E6CF;
    transition: width 0.3s ease;
}

.mobile-menu-link:hover::after {
    width: 80%;
}

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

#menu-toggle.active .menu-line:nth-child(1) {
    transform: translateY(3px) rotate(45deg);
}

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

#menu-toggle.active .menu-line:nth-child(3) {
    transform: translateY(-3px) rotate(-45deg);
    width: 6px;
}

/* ─── Hero ─── */
.hero-bg {
    will-change: transform;
}

.hero-overlay {
    background-image: linear-gradient(
        to bottom,
        rgba(10, 22, 40, 0.4) 0%,
        rgba(10, 22, 40, 0.2) 40%,
        rgba(10, 22, 40, 0.3) 70%,
        rgba(10, 22, 40, 0.8) 100%
    );
}

.hero-headline {
    opacity: 0;
    transform: translateY(30px);
    animation: heroReveal 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.3s forwards;
}

.hero-tag {
    opacity: 0;
    transform: translateY(20px);
    animation: heroReveal 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.1s forwards;
}

.hero-subtext {
    opacity: 0;
    transform: translateY(20px);
    animation: heroReveal 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.5s forwards;
}

.hero-ctas {
    opacity: 0;
    transform: translateY(20px);
    animation: heroReveal 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.7s forwards;
}

@keyframes heroReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-bg {
    animation: heroZoom 20s ease-out forwards;
}

@keyframes heroZoom {
    from {
        transform: scale(1.1);
    }
    to {
        transform: scale(1);
    }
}

/* ─── Scroll Indicator ─── */
@keyframes scrollLine {
    0% {
        top: -16px;
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        top: 48px;
        opacity: 0;
    }
}

.scroll-line {
    animation: scrollLine 2s ease-in-out infinite;
}

.hero-scroll {
    opacity: 0;
    animation: heroReveal 1s ease 1.2s forwards;
}

/* ─── Scroll Reveal ─── */
.reveal {
    opacity: 1;
    transform: translateY(0);
    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.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-200 {
    transition-delay: 0.2s;
}

.reveal-delay-400 {
    transition-delay: 0.4s;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    .hero-headline,
    .hero-tag,
    .hero-subtext,
    .hero-ctas,
    .hero-scroll {
        animation: none;
        opacity: 1;
        transform: none;
    }
    
    .hero-bg {
        animation: none;
        transform: scale(1);
    }
    
    .reveal {
        opacity: 1;
        transform: none;
    }
    
    .scroll-line {
        animation: none;
        opacity: 0.6;
    }
}

/* ─── Menu Items ─── */
.group:hover .font-serif {
    color: #A8E6CF;
}

/* ─── Form ─── */
input:focus,
textarea:focus {
    border-color: #7BC8A8 !important;
}

button[type="submit"]:active {
    transform: scale(0.98);
}

/* ─── Selection ─── */
::selection {
    background-color: rgba(168, 230, 207, 0.3);
    color: #0A1628;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #0A1628;
}

::-webkit-scrollbar-thumb {
    background: rgba(168, 230, 207, 0.3);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(168, 230, 207, 0.5);
}