/* ── Base & Utilities ── */
html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
}

/* ── Scroll Reveal ── */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.scroll-reveal.revealed:nth-child(2) { transition-delay: 0.1s; }
.scroll-reveal.revealed:nth-child(3) { transition-delay: 0.2s; }
.scroll-reveal.revealed:nth-child(4) { transition-delay: 0.3s; }

/* ── Hero Blobs ── */
.hero-blob {
    animation: blob-float 8s ease-in-out infinite;
}

.blob-1 { animation-delay: 0s; }
.blob-2 { animation-delay: -3s; }
.blob-3 { animation-delay: -5s; }

@keyframes blob-float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* ── Why Section Blobs ── */
.why-blob {
    animation: why-blob-move 10s ease-in-out infinite;
}

.why-blob.blob-1 { animation-delay: -2s; }
.why-blob.blob-2 { animation-delay: -6s; }

@keyframes why-blob-move {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-40px, 30px); }
}

/* ── Navbar ── */
#navbar {
    background: transparent;
}

#navbar.scrolled {
    background: rgba(13, 148, 136, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: white;
    border-radius: 1px;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

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

/* ── Mobile Menu ── */
#mobile-menu {
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.mobile-link {
    display: block;
}

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

/* ── Selection ── */
::selection {
    background: #99f6e4;
    color: #134e4a;
}