/* ── Reset & Base ── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* ── Scroll Reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal-up {
        opacity: 0;
        transform: translateY(30px);
        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 {
        opacity: 0;
        transform: translateX(-40px);
        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-right {
        opacity: 0;
        transform: translateX(40px);
        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-up.revealed,
    .reveal-left.revealed,
    .reveal-right.revealed {
        opacity: 1;
        transform: translate(0, 0);
    }

    /* Staggered delays */
    .reveal-up:nth-child(2) { transition-delay: 100ms; }
    .reveal-up:nth-child(3) { transition-delay: 200ms; }
    .reveal-up:nth-child(4) { transition-delay: 300ms; }
}

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

#navbar.scrolled {
    background: rgba(3, 10, 22, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(110, 207, 184, 0.1);
}

#navbar.scrolled .font-serif {
    color: #ffffff;
}

/* ── Scroll Line Animation ── */
.scroll-line {
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); }
}

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

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

/* ── Menu Lines Animation ── */
#menu-btn.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

#menu-btn.active .menu-line:nth-child(2) {
    opacity: 0;
    transform: translateX(10px);
}

#menu-btn.active .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
    width: 24px;
}

/* ── Form Focus States ── */
input:focus,
textarea:focus {
    border-bottom-color: #7ec9b0 !important;
}

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

::-webkit-scrollbar-track {
    background: #061226;
}

::-webkit-scrollbar-thumb {
    background: #1a4378;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2d5b97;
}

/* ── Selection ── */
::selection {
    background: rgba(110, 207, 184, 0.3);
    color: #f0faf6;
}

/* ── Image aspect ratios ── */
.aspect-\[4\/3\] {
    aspect-ratio: 4 / 3;
}

/* ── Button hover glow ── */
button[type="submit"]:hover {
    box-shadow: 0 0 30px rgba(110, 207, 184, 0.2);
}

/* ── Image hover container ── */
.group:hover .group-hover\:scale-105 {
    transform: scale(1.05);
}