/* ============================================
   Animated Dotted Grid Background
   Pure CSS + minimal JS (no Canvas)
   GPU-accelerated transforms
   ============================================ */

/* Container */
.dotted-grid-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
}

/* Dotted grid pattern layer */
.dotted-grid-bg .grid-dots {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background-image: radial-gradient(
        circle,
        var(--grid-dot-color, #cbd5e1) var(--grid-dot-size, 1px),
        transparent var(--grid-dot-size, 1px)
    );
    background-size: var(--grid-dot-spacing, 24px) var(--grid-dot-spacing, 24px);
    animation: gridFloat var(--grid-animation-speed, 20s) linear infinite;
    will-change: transform;
    opacity: 0.6;
}

/* Second dot layer for depth */
.dotted-grid-bg .grid-dots-depth {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background-image: radial-gradient(
        circle,
        var(--grid-dot-color, #cbd5e1) calc(var(--grid-dot-size, 1px) * 0.6),
        transparent calc(var(--grid-dot-size, 1px) * 0.6)
    );
    background-size: calc(var(--grid-dot-spacing, 24px) * 2.5) calc(var(--grid-dot-spacing, 24px) * 2.5);
    animation: gridFloatReverse var(--grid-animation-speed, 20s) linear infinite;
    will-change: transform;
    opacity: 0.3;
}

/* Gradient overlay */
.dotted-grid-bg .grid-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        180deg,
        transparent 0%,
        rgba(255, 255, 255, 0.03) 40%,
        rgba(255, 255, 255, 0.08) 100%
    );
    z-index: 1;
}

/* Mouse glow effect */
.dotted-grid-bg .grid-glow {
    position: absolute;
    width: 350px;
    height: 350px;
    border-radius: 50%;
    background: radial-gradient(
        circle,
        var(--grid-glow-color-alpha, rgba(74, 158, 255, 0.12)) 0%,
        transparent 70%
    );
    pointer-events: none;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
    opacity: 0;
    z-index: 2;
    will-change: left, top;
}

.dotted-grid-bg:hover .grid-glow {
    opacity: 1;
}

/* Subtle vignette edges */
.dotted-grid-bg .grid-vignette {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(
        ellipse at center,
        transparent 50%,
        rgba(0, 0, 0, 0.05) 100%
    );
    z-index: 1;
    pointer-events: none;
}

/* Ensure header content is above the grid */
.header-area.dotted-grid-active {
    position: relative;
    background: linear-gradient(135deg, #f8fafc 0%, #f7f7f7 100%) !important;
}

.header-area.dotted-grid-active > *:not(.dotted-grid-bg) {
    position: relative;
    z-index: 3;
}

/* ---- Animations ---- */
@keyframes gridFloat {
    0% {
        transform: translate3d(0, 0, 0);
    }
    25% {
        transform: translate3d(12px, -8px, 0);
    }
    50% {
        transform: translate3d(6px, 12px, 0);
    }
    75% {
        transform: translate3d(-8px, 6px, 0);
    }
    100% {
        transform: translate3d(0, 0, 0);
    }
}

@keyframes gridFloatReverse {
    0% {
        transform: translate3d(0, 0, 0);
    }
    25% {
        transform: translate3d(-6px, 10px, 0);
    }
    50% {
        transform: translate3d(-12px, -6px, 0);
    }
    75% {
        transform: translate3d(6px, -10px, 0);
    }
    100% {
        transform: translate3d(0, 0, 0);
    }
}

/* ---- Dark Mode ---- */
body.dark-mode-enabled .header-area.dotted-grid-active {
    background: linear-gradient(135deg, var(--dark-bg, #0f0f1a) 0%, var(--dark-surface, #1a1a2e) 100%) !important;
}

body.dark-mode-enabled .dotted-grid-bg .grid-dots {
    background-image: radial-gradient(
        circle,
        var(--grid-dot-color-dark, #334155) var(--grid-dot-size, 1px),
        transparent var(--grid-dot-size, 1px)
    );
    opacity: 0.8;
}

body.dark-mode-enabled .dotted-grid-bg .grid-dots-depth {
    background-image: radial-gradient(
        circle,
        var(--grid-dot-color-dark, #334155) calc(var(--grid-dot-size, 1px) * 0.6),
        transparent calc(var(--grid-dot-size, 1px) * 0.6)
    );
    opacity: 0.4;
}

body.dark-mode-enabled .dotted-grid-bg .grid-gradient {
    background: linear-gradient(
        180deg,
        transparent 0%,
        rgba(0, 0, 0, 0.05) 40%,
        rgba(0, 0, 0, 0.15) 100%
    );
}

body.dark-mode-enabled .dotted-grid-bg .grid-vignette {
    background: radial-gradient(
        ellipse at center,
        transparent 50%,
        rgba(0, 0, 0, 0.15) 100%
    );
}

body.dark-mode-enabled .dotted-grid-bg .grid-glow {
    background: radial-gradient(
        circle,
        var(--grid-glow-color-dark-alpha, rgba(74, 158, 255, 0.12)) 0%,
        transparent 70%
    );
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .dotted-grid-bg .grid-glow {
        display: none;
    }
}