/* ===== BASE & RESET ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* ===== NAVBAR SCROLL STATE ===== */
#navbar {
    background: transparent;
    transition: background 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
}

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.08);
}

.nav-logo-text {
    transition: color 0.3s ease;
}

#navbar.scrolled .nav-logo-text {
    color: #0f172a;
}

.nav-link {
    transition: color 0.2s ease, background 0.2s ease;
}

/* ===== MOBILE MENU ===== */
#mobile-menu {
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-link {
    transition: background 0.2s ease, color 0.2s ease, padding-left 0.2s ease;
}

/* ===== FLOATING ANIMATIONS ===== */
@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(45deg); }
    50% { transform: translateY(-16px) rotate(45deg); }
}

@keyframes float-delay {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

.animate-float {
    animation: float 4s ease-in-out infinite;
}

.animate-float-delay {
    animation: float-delay 3.5s ease-in-out infinite 0.8s;
}

/* ===== SCROLL REVEAL (progressive enhancement) ===== */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 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; }
}

/* ===== CARD HOVER EFFECTS ===== */
.group:hover .group-hover\:-translate-y-1 {
    transform: translateY(-4px);
}

/* ===== FOCUS STYLES ===== */
a:focus-visible, button:focus-visible {
    outline: 2px solid #0d9488;
    outline-offset: 2px;
    border-radius: 0.5rem;
}

/* ===== SELECTION ===== */
::selection {
    background: #0d9488;
    color: #fff;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}