/* ===== Base & Smooth Scrolling ===== */
html {
    scroll-behavior: smooth;
}

/* ===== Hero Glow Effect ===== */
.hero-glow {
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(22, 163, 74, 0.12) 0%, rgba(22, 163, 74, 0.04) 40%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* ===== Subtle Grid Background ===== */
.grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* ===== Phone Glow ===== */
.phone-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 500px;
    background: radial-gradient(ellipse, rgba(22, 163, 74, 0.15) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* ===== CTA Section Glow ===== */
.cta-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(ellipse, rgba(22, 163, 74, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* ===== Navbar Scroll State ===== */
#navbar.scrolled {
    background: rgba(3, 7, 18, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

/* ===== Fade Up Animation (Hero) ===== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease-out forwards;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Scroll Reveal Animation ===== */
.scroll-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ===== Feature Card Stagger ===== */
.feature-card.scroll-reveal {
    transition-delay: calc(var(--delay, 0) * 0.1s);
}

/* ===== Feature Card Hover Glow ===== */
.feature-card > div {
    position: relative;
    overflow: hidden;
}

.feature-card > div::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(74, 222, 128, 0.3), transparent);
    opacity: 0;
    transition: opacity 0.5s;
}

.feature-card:hover > div::before {
    opacity: 1;
}

/* ===== Preview Phone Stagger ===== */
.preview-phone.scroll-reveal {
    transition-delay: calc(var(--delay, 0) * 0.15s);
}

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgb(3, 7, 18);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ===== Selection Color ===== */
::selection {
    background: rgba(22, 163, 74, 0.3);
    color: white;
}