/* ============================================================================
 * ABOUT INFO BUTTON
 * Small circular "i" icon for navigating to the About page
 * Desktop: In nav tabs after Community
 * Mobile: Top-right after BP pill
 * ============================================================================ */

/* ========================
   BASE STYLES (Shared)
   ======================== */
.about-info-btn {
    /* Reset */
    appearance: none;
    -webkit-appearance: none;
    border: none;
    background: none;
    padding: 0;
    margin: 0;
    font: inherit;
    
    /* Sizing - slightly larger for better tap target */
    width: 30px;
    height: 30px;
    min-width: 30px;
    min-height: 30px;
    
    /* Layout */
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    
    /* Appearance - subtle dark glass effect */
    background: linear-gradient(
        145deg, 
        rgba(0, 20, 35, 0.8) 0%,
        rgba(0, 10, 20, 0.9) 100%
    );
    border: 1.5px solid rgba(0, 212, 255, 0.45);
    border-radius: 50%;
    
    /* Inner highlight for depth */
    box-shadow: 
        inset 0 1px 0 rgba(255, 255, 255, 0.05),
        0 0 8px rgba(0, 212, 255, 0.2);
    
    /* Interaction */
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    
    /* Transitions */
    transition: 
        transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1),
        box-shadow 0.25s ease,
        border-color 0.25s ease,
        background 0.25s ease;
    
    /* Contain glow effects */
    overflow: visible;
    z-index: 10;
}

/* The "i" icon inside */
.about-info-icon {
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: 17px;
    font-weight: 700;
    font-style: italic;
    line-height: 1;
    
    /* Text gradient effect */
    background: linear-gradient(135deg, #00d4ff 0%, #00ff88 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    
    /* Glow */
    filter: drop-shadow(0 0 4px rgba(0, 212, 255, 0.5));
    
    /* Smooth transitions */
    transition: 
        filter 0.25s ease,
        transform 0.2s ease;
}

/* ========================
   HOVER STATE (Desktop)
   ======================== */
@media (hover: hover) {
    .about-info-btn:hover {
        transform: scale(1.12);
        border-color: rgba(0, 212, 255, 0.9);
        background: linear-gradient(
            145deg,
            rgba(0, 50, 80, 0.9) 0%,
            rgba(0, 30, 50, 0.95) 100%
        );
        box-shadow: 
            0 0 18px rgba(0, 212, 255, 0.5),
            0 0 30px rgba(0, 212, 255, 0.25),
            inset 0 0 12px rgba(0, 212, 255, 0.15),
            inset 0 1px 0 rgba(255, 255, 255, 0.1);
    }
    
    .about-info-btn:hover .about-info-icon {
        filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.9));
        transform: scale(1.1);
    }
}

/* ========================
   ACTIVE/PRESSED STATE
   ======================== */
.about-info-btn:active {
    transform: scale(0.95);
    border-color: rgba(0, 255, 136, 0.8);
    background: rgba(0, 255, 136, 0.2);
    box-shadow: 
        0 0 20px rgba(0, 255, 136, 0.5),
        inset 0 0 10px rgba(0, 255, 136, 0.15);
}

.about-info-btn:active .about-info-icon {
    filter: drop-shadow(0 0 10px rgba(0, 255, 136, 0.9));
}

/* ========================
   FOCUS STATE (Accessibility)
   ======================== */
.about-info-btn:focus {
    outline: none;
}

.about-info-btn:focus-visible {
    outline: 2px solid #00d4ff;
    outline-offset: 3px;
    box-shadow: 
        0 0 0 4px rgba(0, 212, 255, 0.25),
        0 0 15px rgba(0, 212, 255, 0.4);
}

/* ========================
   DESKTOP SPECIFIC
   ======================== */
.desktop-about-btn {
    /* Position in nav tabs */
    margin-left: 8px;
    flex-shrink: 0;
}

/* Hide mobile version on desktop by default */
.mobile-about-btn {
    display: none;
}

/* ========================
   MOBILE SPECIFIC
   ======================== */
@media (max-width: 480px) {
    /* Hide desktop version on mobile */
    .desktop-about-btn {
        display: none !important;
    }
    
    /* Show mobile version - fixed position in header */
    .mobile-about-btn {
        display: flex !important;
        
        /* Larger tap target for mobile */
        width: 36px;
        height: 36px;
        min-width: 36px;
        min-height: 36px;
        
        /* Fixed position at right edge of header */
        position: absolute !important;
        right: 12px !important;
        top: 50% !important;
        transform: translateY(-50%) !important;
        
        flex-shrink: 0;
        margin: 0 !important;
    }
    
    .mobile-about-btn .about-info-icon {
        font-size: 18px;
    }
}
    
    /* Mobile tap feedback */
    .mobile-about-btn:active {
        transform: scale(0.9);
        background: rgba(0, 212, 255, 0.25);
    }
}

/* ========================
   PULSE ANIMATION (Subtle Attention)
   ======================== */
@keyframes aboutInfoPulse {
    0%, 100% {
        box-shadow: 
            inset 0 1px 0 rgba(255, 255, 255, 0.05),
            0 0 8px rgba(0, 212, 255, 0.2);
        border-color: rgba(0, 212, 255, 0.45);
    }
    50% {
        box-shadow: 
            inset 0 1px 0 rgba(255, 255, 255, 0.08),
            0 0 12px rgba(0, 212, 255, 0.35),
            0 0 20px rgba(0, 212, 255, 0.15);
        border-color: rgba(0, 212, 255, 0.6);
    }
}

/* Subtle pulse when idle - only on desktop */
@media (hover: hover) {
    .about-info-btn:not(:hover):not(:active):not(:focus-visible) {
        animation: aboutInfoPulse 3.5s ease-in-out infinite;
    }
}

/* ========================
   GLOW RING EFFECT (Hover)
   ======================== */
.about-info-btn::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: conic-gradient(
        from 0deg,
        transparent 0%,
        rgba(0, 212, 255, 0.4) 25%,
        transparent 50%,
        rgba(0, 255, 136, 0.4) 75%,
        transparent 100%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
    animation: aboutRingSpin 3s linear infinite;
    animation-play-state: paused;
    filter: blur(1px);
}

@keyframes aboutRingSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@media (hover: hover) {
    .about-info-btn:hover::before {
        opacity: 1;
        animation-play-state: running;
    }
}

/* ========================
   RIPPLE EFFECT ON CLICK
   ======================== */
.about-info-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: radial-gradient(
        circle,
        rgba(0, 212, 255, 0.4) 0%,
        transparent 70%
    );
    opacity: 0;
    transform: scale(0);
    transition: none;
    z-index: 0;
    pointer-events: none;
}

.about-info-btn:active::after {
    opacity: 1;
    transform: scale(2);
    transition: 
        transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        opacity 0.4s ease;
}

/* ========================
   DARK MODE / HIGH CONTRAST
   ======================== */
@media (prefers-contrast: high) {
    .about-info-btn {
        border-width: 2px;
        border-color: #00d4ff;
    }
    
    .about-info-icon {
        -webkit-text-fill-color: #00d4ff;
    }
}

@media (prefers-reduced-motion: reduce) {
    .about-info-btn,
    .about-info-btn::before,
    .about-info-btn::after,
    .about-info-icon,
    .about-tooltip {
        animation: none !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========================
   HIDE ON HOMEPAGE/ABOUT/AUTH PAGES
   ======================== */
html.is-home .about-info-btn,
html.is-about .about-info-btn,
html.is-login .about-info-btn,
html.is-signup .about-info-btn,
body:has(#home-view.active-view) .about-info-btn,
body:has(#about-view.active-view) .about-info-btn,
body:has(#login-view.active-view) .about-info-btn,
body:has(#signup-view.active-view) .about-info-btn {
    display: none !important;
}

/* ========================
   CLICK/TOUCH FEEDBACK
   ======================== */
.about-info-btn.about-btn-clicked {
    transform: scale(0.9);
}

.about-info-btn.about-btn-touched {
    background: rgba(0, 212, 255, 0.25);
    border-color: rgba(0, 212, 255, 0.7);
}

/* ========================
   SUCCESS FLASH ON NAV
   ======================== */
@keyframes aboutNavSuccess {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.7);
    }
    50% {
        box-shadow: 0 0 20px 5px rgba(0, 255, 136, 0.5);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 255, 136, 0);
    }
}

.about-info-btn.about-btn-clicked {
    animation: aboutNavSuccess 0.3s ease-out;
}