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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

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

img, svg {
    display: block;
    max-width: 100%;
}

::selection {
    background: #1B4332;
    color: #FDFCF8;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #FAF7F0;
}
::-webkit-scrollbar-thumb {
    background: #aed0bc;
    border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
    background: #7fb896;
}

/* ===== NAVIGATION ===== */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: #1B4332;
    border-radius: 999px;
    transition: all 0.25s ease;
    transform: translateX(-50%);
}

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

/* ===== MOBILE MENU ===== */
#mobile-menu {
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    opacity: 0;
}

#mobile-menu.open {
    max-height: 400px;
    opacity: 1;
}

.mobile-nav-link {
    display: block;
}

/* ===== HEADER SCROLL STATE ===== */
#site-header.scrolled {
    background: rgba(253, 252, 248, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(27, 67, 50, 0.08), 0 4px 24px rgba(27, 67, 50, 0.06);
}

#site-header.scrolled .font-serif {
    color: #1B4332;
}

/* ===== SCROLL REVEAL ===== */
.reveal {
    opacity: 1;
    transform: translateY(0);
    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);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
    html {
        scroll-behavior: auto;
    }
    * {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}

/* ===== STAGGER CHILDREN ===== */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.stagger-children.revealed > *:nth-child(1) { transition-delay: 0ms;   opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(2) { transition-delay: 80ms;  opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(3) { transition-delay: 160ms; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(4) { transition-delay: 240ms; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(5) { transition-delay: 320ms; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(6) { transition-delay: 400ms; opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
    .stagger-children > * {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* ===== HERO IMAGE PARALLAX (subtle) ===== */
.hero-img {
    will-change: transform;
    transition: transform 0.1s linear;
}

@media (prefers-reduced-motion: reduce) {
    .hero-img {
        transition: none;
    }
}

/* ===== BUTTON HOVER GLOW ===== */
.btn-glow:hover {
    box-shadow: 0 0 0 4px rgba(27, 67, 50, 0.15), 0 10px 40px rgba(27, 67, 50, 0.2) !important;
}

/* ===== FORM INPUT FOCUS RING ANIMATION ===== */
input:focus, textarea:focus {
    animation: focusRing 0.3s ease forwards;
}

@keyframes focusRing {
    from { box-shadow: 0 0 0 3px rgba(27, 67, 50, 0.1); }
    to   { box-shadow: 0 0 0 3px rgba(27, 67, 50, 0.25); }
}

/* ===== SECTION DIVIDER ===== */
.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, #aed0bc, transparent);
}

/* ===== ACCESSIBILITY ===== */
:focus-visible {
    outline: 2px solid #1B4332;
    outline-offset: 2px;
    border-radius: 4px;
}

/* ===== PRINT ===== */
@media print {
    #site-header, #mobile-menu, button { display: none; }
    body { background: white; color: black; }
    a { color: black; text-decoration: underline; }
}