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

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

body {
    overflow-x: hidden;
}

/* Navigation scroll state */
#nav.scrolled {
    background: rgba(250, 248, 244, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(26, 58, 42, 0.08);
}

#nav.scrolled .nav-link {
    color: #1a3a2a;
}

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

#mobile-menu.open .mobile-link {
    animation: fadeUp 0.4s ease 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 fadeUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Menu toggle */
.menu-toggle-active .menu-line:nth-child(1) {
    transform: translateY(5px) rotate(45deg);
}

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

.menu-toggle-active .menu-line:nth-child(3) {
    transform: translateY(-5px) rotate(-45deg);
}

/* Scroll reveal (progressive enhancement) */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s ease, transform 0.7s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(32px);
    }

    .reveal.visible {
        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; }
}

/* Service cards */
.service-card {
    border-left: 1px solid rgba(184, 204, 191, 0.5);
    padding-left: 1.25rem;
    transition: border-color 0.3s ease;
}

.service-card:hover {
    border-left-color: #1a3a2a;
}

@media (max-width: 639px) {
    .service-card {
        border-left: none;
        padding-left: 0;
        border-top: 1px solid rgba(184, 204, 191, 0.5);
        padding-top: 1.25rem;
    }
}

/* Approach cards */
.approach-card {
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .approach-card {
        transform: translateY(0);
    }

    .approach-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 40px rgba(26, 58, 42, 0.1);
    }
}

/* Input focus animation */
input:focus,
textarea:focus {
    box-shadow: 0 0 0 3px rgba(26, 58, 42, 0.1);
}

/* Selection */
::selection {
    background: #1a3a2a;
    color: #faf8f4;
}

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

::-webkit-scrollbar-track {
    background: #f5f2ec;
}

::-webkit-scrollbar-thumb {
    background: #b8ccbf;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #8fa896;
}