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

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

body {
    overflow-x: hidden;
}

::selection {
    background: #059669;
    color: white;
}

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

::-webkit-scrollbar-track {
    background: #f5eedc;
}

::-webkit-scrollbar-thumb {
    background: #059669;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #047857;
}

/* ===== Scroll Animations ===== */
.scroll-reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .scroll-reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .animate-scroll-down {
        animation: none;
    }
}

/* Scroll reveal default state (visible for progressive enhancement) */
.scroll-reveal {
    opacity: 1;
    transform: translateY(0);
}

/* JS-enhanced reveal (applied only when JS is available and motion preferred) */
@media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }
    
    .scroll-reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    
    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }
}

/* ===== Scroll indicator animation ===== */
@keyframes scrollDown {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

.animate-scroll-down {
    animation: scrollDown 1.5s ease-in-out infinite;
}

/* ===== Navbar Transition ===== */
.nav-scrolled {
    background: rgba(253, 252, 248, 0.95) !important;
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(5, 150, 105, 0.08);
}

.nav-scrolled #navbar {
    padding-top: 0;
    padding-bottom: 0;
}

/* ===== Service Card Hover ===== */
.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    opacity: 0;
    transition: opacity 0.5s ease;
    border-radius: inherit;
    z-index: 0;
}

.service-card:hover::before {
    opacity: 1;
}

.service-card > * {
    position: relative;
    z-index: 1;
}

/* ===== Experience Card Hover ===== */
.experience-card {
    position: relative;
}

.experience-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, #059669, #34d399);
    border-radius: 2px;
    transition: width 0.4s ease;
}

.experience-card:hover::after {
    width: 60%;
}

/* ===== Testimonial Card ===== */
.testimonial-card {
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 20px;
    font-family: 'Playfair Display', serif;
    font-size: 6rem;
    color: #d1fae5;
    line-height: 1;
    z-index: 0;
    pointer-events: none;
}

.testimonial-card > * {
    position: relative;
    z-index: 1;
}

/* ===== Button Focus ===== */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 2px solid #059669;
    outline-offset: 2px;
    border-radius: inherit;
}

/* ===== Mobile Menu Animation ===== */
.mobile-menu-open .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-open .menu-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-open .menu-line:nth-child(3) {
    width: 1.5rem;
    transform: rotate(-45deg) translate(5px, -5px);
}

#mobileMenu.menu-open {
    opacity: 1;
    pointer-events: all;
}

/* ===== Utility ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ===== Print Styles ===== */
@media print {
    nav, #contact, footer, .scroll-indicator {
        display: none;
    }
    
    body {
        color: #000;
        background: #fff;
    }
}