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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Hero Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Navbar */
#navbar {
    background: transparent;
}

#navbar.scrolled {
    background: rgba(2, 6, 23, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* Menu Tabs */
.menu-tab {
    color: #94a3b8;
    background: transparent;
    cursor: pointer;
}

.menu-tab.active {
    color: #0f172a;
    background: linear-gradient(135deg, #14b8a6, #0d9488);
    box-shadow: 0 4px 15px rgba(20, 184, 166, 0.3);
}

.menu-tab:hover:not(.active) {
    color: #fbbf24;
    background: rgba(251, 191, 36, 0.1);
}

/* Menu Content */
.menu-content {
    animation: fadeInContent 0.4s ease forwards;
}

@keyframes fadeInContent {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Reveal Animations (below fold only) */
.reveal-down,
.reveal-left,
.reveal-right {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-down.revealed,
.reveal-left.revealed,
.reveal-right.revealed {
    /* Default state is visible — JS adds class for animation on scroll */
}

@media (prefers-reduced-motion: no-preference) {
    .reveal-down {
        opacity: 0;
        transform: translateY(30px);
    }
    .reveal-left {
        opacity: 0;
        transform: translateX(-30px);
    }
    .reveal-right {
        opacity: 0;
        transform: translateX(30px);
    }
    .reveal-down.revealed,
    .reveal-left.revealed,
    .reveal-right.revealed {
        opacity: 1;
        transform: translate(0, 0);
    }
}

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

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

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #0f172a;
}
::-webkit-scrollbar-thumb {
    background: #334155;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #475569;
}

/* Selection */
::selection {
    background: rgba(20, 184, 166, 0.3);
    color: #f1f5f9;
}