/* ── Base ── */
*, *::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;
}

::selection {
    background: #2dd4bf;
    color: #040a14;
}

/* ── Scroll Line Animation ── */
.scroll-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 40%;
    background: #0f172a;
    animation: scrollDown 1.8s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { transform: translateY(-100%); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(200%); opacity: 0; }
}

/* ── Scroll Reveal ── */
.reveal-up {
    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-left {
    opacity: 1;
    transform: translateX(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-right {
    opacity: 1;
    transform: translateX(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);
}

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

/* ── Navbar ── */
.nav-link {
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #2dd4bf;
    transition: width 0.3s ease;
}

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

.nav-link:hover {
    color: #14b8a6;
}

/* ── Mobile Menu ── */
.mobile-menu-link {
    position: relative;
    transition: color 0.3s ease;
}

.mobile-menu-link:hover {
    color: #14b8a6;
}

#menu-toggle.active .nav-line-1 {
    transform: rotate(45deg) translate(3px, 3px);
}

#menu-toggle.active .nav-line-2 {
    transform: rotate(-45deg) translate(2px, -2px);
}

/* ── Image Hover ── */
img {
    display: block;
}

/* ── Form Focus ── */
input:focus,
textarea:focus {
    border-bottom-color: #2dd4bf !important;
}

/* ── Smooth Scroll Offset ── */
section[id] {
    scroll-margin-top: 80px;
}

/* ── Responsive ── */
@media (max-width: 767px) {
    .font-serif {
        line-height: 1.1;
    }
}