/* ─── Base & Typography ─── */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

::selection {
    background-color: rgba(26, 77, 46, 0.15);
    color: #1a4d2e;
}

/* ─── Section Styles ─── */
.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #3d7a4a;
    background: linear-gradient(135deg, #dce8e0 0%, #f0f5f2 100%);
    padding: 0.4em 1em;
    border-radius: 100px;
    border: 1px solid rgba(61, 122, 74, 0.15);
}

.section-title {
    font-family: 'Lora', serif;
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 600;
    line-height: 1.2;
    color: #133a22;
}

.section-desc {
    font-size: 1.05rem;
    line-height: 1.75;
    color: #2d6038;
    opacity: 0.75;
}

/* ─── Service Cards ─── */
.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #1a4d2e, #3d7a4a);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card:hover::after {
    transform: scaleX(1);
}

/* ─── Approach Cards ─── */
.approach-card {
    position: relative;
}

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

/* ─── Scroll Reveal Animations ─── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .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; }
    .reveal-delay-5 { transition-delay: 0.5s; }
    .reveal-delay-6 { transition-delay: 0.6s; }
}

/* ─── Navbar Scroll State ─── */
#navbar.scrolled {
    background: rgba(250, 249, 246, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(26, 77, 46, 0.06), 0 4px 20px rgba(26, 77, 46, 0.04);
}

#navbar.scrolled .menu-line {
    background-color: #1a4d2e;
}

/* ─── Mobile Menu ─── */
#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}

#mobile-menu.open .mobile-link {
    animation: fadeSlideDown 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

#mobile-menu.open .mobile-link:nth-child(1) { animation-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { animation-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { animation-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { animation-delay: 0.2s; }

@keyframes fadeSlideDown {
    from {
        opacity: 0;
        transform: translateY(-12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─── Mobile Menu Button Active State ─── */
#menu-btn.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

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

#menu-btn.active .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
    width: 20px;
}

/* ─── Smooth Anchor Scrolling Offset ─── */
[id] {
    scroll-margin-top: 80px;
}

/* ─── Focus Visible ─── */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid #3d7a4a;
    outline-offset: 2px;
    border-radius: 4px;
}

/* ─── Form Input Focus ─── */
input:focus,
textarea:focus {
    background-color: #fff;
}

/* ─── Image Hover Zoom ─── */
.relative > img {
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

::-webkit-scrollbar-track {
    background: #faf9f6;
}

::-webkit-scrollbar-thumb {
    background: #bcd3be;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #8fb895;
}