/* Base & Reset */
*, *::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;
}

/* Selection */
::selection {
    background: #0d9488;
    color: white;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: #f8fafc;
}
::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: #0d9488;
}

/* Tag Label */
.tag-label {
    letter-spacing: 0.3em;
}

/* Navbar */
#navbar {
    transition: background-color 0.5s ease, box-shadow 0.5s ease, padding 0.5s ease;
}

#navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

.nav-logo {
    color: #1e293b;
    transition: color 0.3s ease;
}

#navbar:not(.scrolled) .nav-logo {
    color: #f8fafc;
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #0d9488;
    transition: width 0.3s ease;
}

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

#navbar:not(.scrolled) .nav-link {
    color: rgba(255, 255, 255, 0.7);
}

#navbar:not(.scrolled) .nav-link:hover {
    color: #5eead4;
}

#navbar:not(.scrolled) .nav-link::after {
    background: #5eead4;
}

/* Hero Animations */
.hero-subtitle {
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.2s;
    opacity: 0;
}

.hero-title {
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.4s;
    opacity: 0;
}

.hero-desc {
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.6s;
    opacity: 0;
}

.hero-ctas {
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.8s;
    opacity: 0;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Reveal Base (progressive enhancement) */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
    }

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

    .service-reveal {
        transition-delay: 0s;
    }
    .service-reveal:nth-child(1) { transition-delay: 0s; }

    .service-card {
        transition-delay: 0.05s;
    }

    .gallery-item {
        transition-delay: 0s;
    }
    .gallery-item:nth-child(2) { transition-delay: 0.1s; }
    .gallery-item:nth-child(3) { transition-delay: 0.2s; }
    .gallery-item:nth-child(4) { transition-delay: 0.3s; }

    .testimonial {
        transition-delay: 0s;
    }
    .testimonial:nth-child(2) { transition-delay: 0.15s; }
    .testimonial:nth-child(3) { transition-delay: 0.3s; }
}

/* About Section */
.about-image {
    transition-delay: 0.1s;
}

.about-content {
    transition-delay: 0.2s;
}

/* Gallery */
.gallery-item {
    transition-delay: 0s;
}

/* Contact */
.contact-info {
    transition-delay: 0.1s;
}

.contact-form-wrap {
    transition-delay: 0.2s;
}

/* Mobile Menu */
#mobile-menu {
    animation: slideDown 0.3s ease forwards;
}

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

/* Button focus states */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid #0d9488;
    outline-offset: 2px;
}

/* Print */
@media print {
    #navbar, #mobile-menu-btn, .reveal { display: none; }
    body { color: #000; background: #fff; }
}