/* ===== 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', system-ui, sans-serif;
}

/* ===== SCROLL REVEAL (progressive enhancement) ===== */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(32px);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }

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

    /* Stagger children */
    .reveal-stagger > * {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    }

    .reveal-stagger.revealed > *:nth-child(1) { transition-delay: 0s; }
    .reveal-stagger.revealed > *:nth-child(2) { transition-delay: 0.1s; }
    .reveal-stagger.revealed > *:nth-child(3) { transition-delay: 0.2s; }
    .reveal-stagger.revealed > *:nth-child(4) { transition-delay: 0.3s; }
    .reveal-stagger.revealed > *:nth-child(5) { transition-delay: 0.4s; }
}

/* Fallback: content is always visible if JS is disabled or prefers-reduced-motion */
.no-js .reveal,
.reveal {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    .reveal,
    .reveal-stagger > * {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* ===== NAVBAR ===== */
#navbar {
    background: transparent;
    transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#navbar.scrolled {
    background: rgba(10, 22, 40, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

/* ===== MOBILE MENU ===== */
#mobile-menu {
    animation: slideDown 0.3s ease forwards;
}

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

/* ===== HERO ===== */
#hero {
    position: relative;
}

/* ===== BUTTONS ===== */
a {
    text-decoration: none;
}

/* ===== SELECTION ===== */
::selection {
    background: rgba(226, 184, 50, 0.3);
    color: #ffffff;
}

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

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

::-webkit-scrollbar-thumb {
    background: #1b3a6e;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #214786;
}

/* ===== UTILITY ===== */
@media (max-width: 639px) {
    .font-display {
        font-size: 2rem;
        line-height: 1.15;
    }
}