/* ============================================================================
   ATLATECH SRL — EFFECTS
   ----------------------------------------------------------------------------
   Effetti avanzati: spotlight card (mouse-reactive), glassmorphism,
   glow, noise texture, grid background, border gradient, magnetic hover.
   ============================================================================ */

/* ==========================================================================
   1. SPOTLIGHT CARD — card con bagliore che segue il mouse
   ========================================================================== */
.spotlight-card {
    --spotlight-x: 50%;
    --spotlight-y: 50%;
    --spotlight-size: 360px;

    position: relative;
    padding: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--r-lg);
    overflow: hidden;
    isolation: isolate;
    transition: border-color var(--dur-base) var(--ease-standard),
                transform var(--dur-base) var(--ease-out);
}

.spotlight-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    background: radial-gradient(
        var(--spotlight-size) circle at var(--spotlight-x) var(--spotlight-y),
        rgba(201, 168, 76, 0.35),
        transparent 70%
    );
    opacity: 0;
    transition: opacity var(--dur-base) var(--ease-standard);
    z-index: -1;
    pointer-events: none;
}

.spotlight-card::after {
    content: '';
    position: absolute;
    inset: 1px;
    background: radial-gradient(
        var(--spotlight-size) circle at var(--spotlight-x) var(--spotlight-y),
        rgba(201, 168, 76, 0.08),
        transparent 70%
    ),
    var(--color-bg-card);
    border-radius: calc(var(--r-lg) - 1px);
    z-index: -1;
    transition: background var(--dur-fast) var(--ease-standard);
}

.spotlight-card:hover {
    transform: translateY(-3px);
    border-color: transparent;
}
.spotlight-card:hover::before { opacity: 1; }

/* ==========================================================================
   2. GLASSMORPHISM — pannelli traslucidi
   ========================================================================== */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-md);
}

.glass-strong {
    background: var(--glass-bg-strong);
    backdrop-filter: blur(var(--glass-blur-lg));
    -webkit-backdrop-filter: blur(var(--glass-blur-lg));
    border: 1px solid var(--glass-border);
}

/* Fallback se backdrop-filter non supportato */
@supports not (backdrop-filter: blur(10px)) {
    .glass, .glass-strong {
        background: var(--color-bg-card);
    }
}

/* ==========================================================================
   3. GLOW EFFECTS
   ========================================================================== */
.glow-primary   { box-shadow: var(--shadow-glow); }
.glow-soft      { box-shadow: var(--shadow-glow-soft); }
.glow-accent    { box-shadow: var(--shadow-accent-glow); }

.glow-text {
    text-shadow: 0 0 24px var(--color-primary-glow);
}

.glow-border {
    position: relative;
}
.glow-border::before {
    content: '';
    position: absolute;
    inset: -1px;
    padding: 1px;
    background: var(--gradient-primary);
    border-radius: inherit;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
            mask-composite: exclude;
    pointer-events: none;
}

/* ==========================================================================
   4. NOISE TEXTURE — sottile texture per ridurre banding
   ========================================================================== */
.has-noise {
    position: relative;
    isolation: isolate;
}
.has-noise::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' seed='5'/><feColorMatrix values='0 0 0 0 0.95  0 0 0 0 0.90  0 0 0 0 0.85  0 0 0 0.18 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
    background-size: 160px 160px;
    mix-blend-mode: overlay;
    opacity: 0.35;
    pointer-events: none;
    z-index: 1;
}

/* ==========================================================================
   5. GRID BACKGROUND — sottile griglia dietro le sezioni hero
   ========================================================================== */
.grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--color-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
    background-size: 80px 80px;
    opacity: 0.35;
    pointer-events: none;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}

.grid-bg--sm { background-size: 40px 40px; }
.grid-bg--lg { background-size: 120px 120px; }

/* ==========================================================================
   6. DOT BACKGROUND
   ========================================================================== */
.dot-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle, var(--color-border-strong) 1px, transparent 1.5px);
    background-size: 24px 24px;
    opacity: 0.4;
    pointer-events: none;
    mask-image: radial-gradient(ellipse at center, #000 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 20%, transparent 70%);
}

/* ==========================================================================
   7. BORDER GRADIENT (bordo gradient animato)
   ========================================================================== */
.border-gradient {
    position: relative;
    background: var(--color-bg-card);
    border-radius: var(--r-lg);
    isolation: isolate;
}
.border-gradient::before {
    content: '';
    position: absolute;
    inset: 0;
    padding: 1px;
    background: var(--gradient-border);
    border-radius: inherit;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
            mask-composite: exclude;
    pointer-events: none;
    z-index: -1;
}

.border-gradient-animated::before {
    background: linear-gradient(
        90deg,
        var(--color-primary),
        var(--color-accent-1),
        var(--color-accent-2),
        var(--color-primary)
    );
    background-size: 300% 100%;
    animation: gradientShift 6s linear infinite;
}

/* ==========================================================================
   8. MAGNETIC / TILT HOVER
   ========================================================================== */
.magnetic {
    transition: transform 0.25s var(--ease-out);
    will-change: transform;
}

.tilt {
    transform-style: preserve-3d;
    transition: transform 0.4s var(--ease-out);
}
.tilt > * { transform: translateZ(30px); }

/* ==========================================================================
   9. GLOW ORB POSITIONING HELPERS
   ========================================================================== */
.orbs-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}
.orbs-layer > .glow-orb--1 { width: 420px; height: 420px; top: -80px; left: -120px; }
.orbs-layer > .glow-orb--2 { width: 320px; height: 320px; bottom: -100px; right: -80px; }
.orbs-layer > .glow-orb--3 { width: 280px; height: 280px; top: 40%; right: 20%; }

/* ==========================================================================
   10. CUSTOM CURSOR
   ========================================================================== */
.cursor-dot,
.cursor-ring {
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: var(--z-cursor);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    mix-blend-mode: difference;
}

.cursor-dot {
    width: 8px;
    height: 8px;
    background: var(--color-text);
    transition: transform 0.08s var(--ease-out), width 0.2s, height 0.2s, background 0.2s;
}

.cursor-ring {
    width: 36px;
    height: 36px;
    border: 1.5px solid var(--color-primary);
    transition:
        transform 0.18s var(--ease-out),
        width 0.3s var(--ease-out),
        height 0.3s var(--ease-out),
        border-color 0.2s,
        background 0.2s;
}

body.cursor-hover .cursor-dot {
    width: 0;
    height: 0;
}
body.cursor-hover .cursor-ring {
    width: 64px;
    height: 64px;
    background: rgba(201, 168, 76, 0.08);
    border-color: var(--color-primary);
}

body.cursor-click .cursor-ring {
    transform: translate(-50%, -50%) scale(0.8);
}

/* Nasconde su touch device */
@media (hover: none) or (pointer: coarse) {
    .cursor-dot, .cursor-ring { display: none !important; }
    body.has-custom-cursor, body.has-custom-cursor * { cursor: auto !important; }
}

/* ==========================================================================
   11. IMAGE TREATMENTS
   ========================================================================== */
.img-grayscale {
    filter: grayscale(1) brightness(0.9);
    transition: filter var(--dur-slow) var(--ease-out);
}
.img-grayscale:hover { filter: grayscale(0) brightness(1); }

.img-duotone {
    filter: sepia(1) saturate(0) brightness(0.9);
    mix-blend-mode: luminosity;
}

/* Image placeholder (skeleton) */
.img-skeleton {
    background: linear-gradient(
        90deg,
        var(--color-bg-card) 0%,
        var(--color-bg-card-hover) 50%,
        var(--color-bg-card) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.6s linear infinite;
}