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

html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
}

::selection {
    background: #a8e6cf;
    color: #0a1f3f;
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #0a1f3f;
}
::-webkit-scrollbar-thumb {
    background: #a8e6cf;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #6dd3a8;
}

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

#navbar.scrolled {
    background: rgba(10, 31, 63, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

#navbar.scrolled .font-serif,
#navbar.scrolled .text-navy-800 {
    color: #fff !important;
}

#navbar.scrolled .text-navy-600,
#navbar.scrolled .text-navy-700 {
    color: rgba(255, 255, 255, 0.8) !important;
}

#navbar.scrolled .menu-line {
    background: #fff !important;
}

/* ========== MOBILE MENU ========== */
.mobile-link {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

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

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

/* ========== CARD HOVER ========== */
.card-hover {
    will-change: transform;
}

.card-hover > div {
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

/* ========== REVEAL ANIMATIONS ========== */
/* Default state: visible (progressive enhancement) */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* When JS adds the 'revealed' class, animate in */
.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.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; }

/* ========== REDUCED MOTION ========== */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
    html {
        scroll-behavior: auto;
    }
}

/* ========== FORM FOCUS ========== */
input:focus, select:focus, textarea:focus {
    outline: none;
}

/* ========== BUTTON RIPPLE ========== */
button, a {
    -webkit-tap-highlight-color: transparent;
}

/* ========== MOBILE MENU ANIMATION ========== */
.menu-line {
    transition: transform 0.3s ease, opacity 0.3s ease, width 0.3s ease;
}

#menu-toggle.active .menu-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}
#menu-toggle.active .menu-line:nth-child(2) {
    opacity: 0;
}
#menu-toggle.active .menu-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
    width: 1.5rem;
}