/* ===== Base & Utilities ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { overflow-x: hidden; }

/* ===== Navigation ===== */
.nav-link { position: relative; }
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #E8644B;
    border-radius: 1px;
    transition: width 0.3s ease;
}
.nav-link:hover::after { width: 100%; }

#nav {
    background: transparent;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}
#nav.scrolled {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(0,0,0,0.08);
}

/* ===== Mobile Menu ===== */
.mobile-link { transition: all 0.2s ease; }
#mobile-menu { animation: slideDown 0.3s ease; }
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Floating Cards ===== */
.floating-card {
    animation: float 4s ease-in-out infinite;
}
.floating-card-delayed {
    animation: float 4s ease-in-out infinite;
    animation-delay: 2s;
}
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* ===== Scroll Animations ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.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; }

/* ===== Section Dividers ===== */
.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, #e8e8e8, transparent);
}

/* ===== Button Ripple Effect ===== */
.btn-primary {
    position: relative;
    overflow: hidden;
}
.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--x, 50%) var(--y, 50%), rgba(255,255,255,0.2), transparent 60%);
    opacity: 0;
    transition: opacity 0.3s;
}
.btn-primary:hover::after { opacity: 1; }

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f6f6f6; }
::-webkit-scrollbar-thumb { background: #d1d1d1; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #a0a0a0; }

/* ===== Selection ===== */
::selection { background: #fde4dc; color: #66261c; }

/* ===== Responsive tweaks ===== */
@media (max-width: 768px) {
    .floating-card, .floating-card-delayed { display: none; }
}

/* ===== Print ===== */
@media print {
    nav, #mobile-toggle, #mobile-menu { display: none !important; }
    body { color: #000; background: #fff; }
}