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

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

body {
    margin: 0;
    background-color: #0a1628;
    color: #ffffff;
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
}

::selection {
    background-color: #f59e0b;
    color: #0a1628;
}

/* ===== Scroll Reveal (Progressive Enhancement) ===== */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    .reveal:nth-child(2) { transition-delay: 0.05s; }
    .reveal:nth-child(3) { transition-delay: 0.1s; }
    .reveal:nth-child(4) { transition-delay: 0.15s; }
    .reveal:nth-child(5) { transition-delay: 0.2s; }
    .reveal:nth-child(6) { transition-delay: 0.25s; }
}

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

/* ===== Floating Animation ===== */
@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(45deg); }
    50% { transform: translateY(-20px) rotate(45deg); }
}

.animate-float {
    animation: float 6s ease-in-out infinite;
}

/* ===== Navbar ===== */
#navbar {
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
}

#navbar.scrolled {
    background-color: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
}

/* ===== Mobile Menu ===== */
#mobile-menu {
    animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.mobile-link {
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-link:last-child {
    border-bottom: none;
}

/* ===== FAQ ===== */
.faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s ease;
}

.faq-content.open {
    max-height: 200px;
}

/* ===== Back to Top ===== */
#back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

#back-to-top:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(245, 158, 11, 0.35);
}

/* ===== Focus States ===== */
a:focus-visible, button:focus-visible {
    outline: 2px solid #fbbf24;
    outline-offset: 2px;
    border-radius: 4px;
}

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

::-webkit-scrollbar-track {
    background: #0a1628;
}

::-webkit-scrollbar-thumb {
    background: #1e3659;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #f59e0b;
}

/* ===== Image optimization ===== */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===== Utility ===== */
.text-gradient-gold {
    background: linear-gradient(135deg, #fbbf24, #f59e0b, #d97706);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}