/* ===== BASE & RESET ===== */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    overflow-x: hidden;
}

/* ===== NAVBAR ===== */
#navbar {
    background: transparent;
    transition: background-color 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#navbar.scrolled {
    background: rgba(7, 26, 16, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06), 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1.5px;
    background: currentColor;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 60%;
}

/* ===== MOBILE MENU ===== */
.mobile-nav-link {
    position: relative;
}

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

#mobile-menu.closed {
    opacity: 0;
    pointer-events: none;
}

/* ===== SCROLL REVEAL ===== */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal[data-reveal-delay="100"] { transition-delay: 0.1s; }
.reveal[data-reveal-delay="200"] { transition-delay: 0.2s; }
.reveal[data-reveal-delay="300"] { transition-delay: 0.3s; }
.reveal[data-reveal-delay="400"] { transition-delay: 0.4s; }
.reveal[data-reveal-delay="500"] { transition-delay: 0.5s; }

@media (prefers-reduced-motion: no-preference) {
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Default state: visible (progressive enhancement) */
.reveal {
    opacity: 1;
    transform: translateY(0);
}

/* JS adds this class to trigger animation */
.reveal.animate {
    opacity: 0;
    transform: translateY(24px);
}

@media (prefers-reduced-motion: no-preference) {
    .reveal.animate.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== SERVICE CARDS ===== */
.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #047857, #10b981);
    opacity: 0;
    transition: opacity 0.4s ease;
}

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

.service-card:hover {
    transform: translateY(-4px);
}

/* ===== HERO GRADIENT ANIMATION ===== */
@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

#hero {
    background-size: 200% 200%;
    animation: gradientShift 12s ease infinite;
}

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

::-webkit-scrollbar-track {
    background: #f5f3ed;
}

::-webkit-scrollbar-thumb {
    background: #047857;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #065f46;
}

/* ===== SELECTION ===== */
::selection {
    background: rgba(4, 120, 87, 0.2);
    color: #0f311f;
}

/* ===== FOCUS VISIBLE ===== */
:focus-visible {
    outline: 2px solid #047857;
    outline-offset: 2px;
    border-radius: 4px;
}

/* ===== FORM STYLES ===== */
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='%23374151' stroke-width='2.5' 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 1rem center;
    padding-right: 2.5rem;
}

/* ===== SMOOTH IMAGE LOADING ===== */
img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

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