/* Radial Share Menu Component */
.radial-share-menu {
    position: absolute;
    bottom: 50%;
    right: 50%;
    width: 260px;
    height: 260px;
    pointer-events: none;
    opacity: 0;
    transform: translate(50%, 50%) scale(0.8);
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 20;
    overflow: visible;
    clip-path: circle(50% at 50% 50%);
}

.radial-share-menu.active {
    pointer-events: auto;
    opacity: 1;
    transform: translate(50%, 50%) scale(1);
}

.radial-track {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 100%;
    transform-origin: center center;
    touch-action: none;
}

.radial-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: radial-gradient(circle, #ffffff 0px, #ffffff 58px, #f3f4f6 59px, #f3f4f6 100%);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    z-index: -1;
    pointer-events: none;
}

/* Specific backdrop for slide share to preserve button appearance */
.slide-share-wrapper .radial-backdrop,
.hero-section .radial-backdrop {
    background: radial-gradient(circle, transparent 0px, transparent 58px, #f3f4f6 59px, #f3f4f6 100%);
    -webkit-mask-image: conic-gradient(from 0deg at 50% 50%, black 0deg, black 90deg, transparent 90deg, transparent 180deg, black 180deg, black 360deg);
    mask-image: conic-gradient(from 0deg at 50% 50%, black 0deg, black 90deg, transparent 90deg, transparent 180deg, black 180deg, black 360deg);
}

/* Override for Top Cards: Inner circle should be white (not transparent) */
.top-card-share .radial-backdrop {
    background: radial-gradient(circle, #ffffff 0px, #ffffff 58px, #f3f4f6 59px, #f3f4f6 100%);
}

/* Specific adjustment for Hero Side Share (Smaller menu needs smaller hole) */
.hero-side-share .radial-backdrop {
    background: radial-gradient(circle, transparent 0px, transparent 35px, #f3f4f6 36px, #f3f4f6 100%);
}

.share-item {
    position: absolute;
    width: 44px;
    height: 44px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    color: #4B5563;
    text-decoration: none;
    transition: transform 0.2s, background-color 0.2s, color 0.2s;
    left: 0;
    top: 0;
    opacity: 0;
}

.radial-share-menu.active .share-item {
    opacity: 1;
}

.share-item:hover {
    background-color: #7986CB;
    color: white;
    transform: scale(1.15);
    z-index: 10;
}

.share-item i {
    font-size: 20px;
}

.share-item svg {
    width: 22px;
    height: 22px;
    fill: currentColor;
}

/* Staggered animation for share items */
.share-item:nth-child(1) {
    transition-delay: 0.05s;
}

.share-item:nth-child(2) {
    transition-delay: 0.1s;
}

.share-item:nth-child(3) {
    transition-delay: 0.15s;
}

.share-item:nth-child(4) {
    transition-delay: 0.2s;
}

/* --- Dark Mode Radial Menu --- */
[data-theme="dark"] .radial-backdrop {
    background: radial-gradient(circle, #252E36 0px, #252E36 58px, #f3f4f6 59px, #f3f4f6 100%);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .share-item {
    background: #374151;
    color: #F9FAFB;
}

[data-theme="dark"] .share-item:hover {
    background-color: #7986CB;
    color: white;
}

[data-theme="dark"] .slide-share-wrapper .radial-backdrop,
[data-theme="dark"] .hero-section .radial-backdrop {
    background: radial-gradient(circle, transparent 0px, transparent 58px, #f3f4f6 59px, #f3f4f6 100%);
}

[data-theme="dark"] .top-card-share .radial-backdrop {
    background: radial-gradient(circle, #252E36 0px, #252E36 58px, #f3f4f6 59px, #f3f4f6 100%);
}

[data-theme="dark"] .hero-side-share .radial-backdrop {
    background: radial-gradient(circle, transparent 0px, transparent 35px, #f3f4f6 36px, #f3f4f6 100%);
}

/* Research Layout (Card Kham Pha) Adjustments */
.research-layout .radial-share-menu {
    width: 320px;
    height: 320px;
}

.research-layout .radial-backdrop {
    /* Donut style: Transparent center, White ring */
    background: radial-gradient(circle, transparent 0px, transparent 100px, #ffffff 100.5px, #ffffff 100%);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    opacity: 1;
}

.research-layout .share-item {
    /* High contrast: Dark button on White track */
    background-color: #374151;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.research-layout .share-item:hover {
    background-color: #111827;
    transform: scale(1.15);
    color: #ffffff;
}

/* Ensure SVG fills correctly */
.research-layout .share-item svg {
    fill: currentColor;
}