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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(20, 184, 166, 0.2);
    color: #134e4a;
}

/* Scroll indicator animation */
.scroll-indicator {
    opacity: 0.6;
}

/* Hero animations */
.hero-anim {
    opacity: 0;
    transform: translateY(30px);
    animation: heroReveal 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.hero-anim:nth-child(1) { animation-delay: 0.1s; }
.hero-anim:nth-child(2) { animation-delay: 0.3s; }
.hero-anim:nth-child(3) { animation-delay: 0.5s; }
.hero-anim:nth-child(4) { animation-delay: 0.7s; }

@keyframes heroReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll reveal — progressive enhancement, only applies when JS is active */
.reveal {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(40px);
        transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
    }

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

/* Navbar transition */
#navbar {
    transition: background-color 0.4s ease, padding 0.4s ease;
}

#navbar.scrolled {
    background-color: rgba(4, 47, 46, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Mobile menu transitions */
#nav-menu {
    transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

#nav-menu.open {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

/* Hamburger animation */
.bar {
    transition: transform 0.3s ease, opacity 0.3s ease;
}

#menu-toggle.active .bar:nth-child(1) {
    transform: translateY(4px) rotate(45deg);
}

#menu-toggle.active .bar:nth-child(2) {
    opacity: 0;
}

#menu-toggle.active .bar:nth-child(3) {
    transform: translateY(-4px) rotate(-45deg);
    width: 1.5rem;
}

/* Subtle hover on gallery images */
overflow-hidden {
    position: relative;
}

/* Form select arrow */
select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0 center;
    padding-right: 2rem;
}

/* Thin line accents */
.divider-line {
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(20, 184, 166, 0.3), transparent);
}

/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid #14b8a6;
    outline-offset: 2px;
}

/* Smooth image loading */
img {
    opacity: 1;
    transition: opacity 0.3s ease;
}

/* Prevent flash of unstyled content */
.no-js .reveal {
    opacity: 1;
    transform: none;
}