/* Base */
html { scroll-behavior: smooth; }
body { overflow-x: hidden; }

/* Scroll-triggered fade-in */
.fade-in {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}
.fade-in.delay-1 { transition-delay: 0.1s; }
.fade-in.delay-2 { transition-delay: 0.2s; }
.fade-in.delay-3 { transition-delay: 0.3s; }

/* Menu lines animation */
.menu-line {
    transition: transform 0.3s ease, width 0.3s ease, opacity 0.3s ease;
}
#menu-toggle.active .menu-line:nth-child(1) {
    transform: translateY(4px) rotate(45deg);
}
#menu-toggle.active .menu-line:nth-child(2) {
    opacity: 0;
    width: 0;
}
#menu-toggle.active .menu-line:nth-child(3) {
    transform: translateY(-4px) rotate(-45deg);
    width: 24px;
}

/* Mobile menu open */
#mobile-menu.open {
    max-height: 400px;
}

/* Header shadow on scroll */
header.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
}

/* Subtle image zoom on hover */
.rounded-3xl img {
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.rounded-3xl:hover img {
    transform: scale(1.03);
}