/* ===================================================
   WhatsApp Chat Button - The Creative Cell
   Fully Responsive: Mobile & Desktop
   Premium, Modern, Conversion-Focused Design
   =================================================== */

/* ===== CSS VARIABLES ===== */
:root {
    --whatsapp-green: #25D366;
    --whatsapp-green-hover: #20bd5a;
    --whatsapp-dark: #128C7E;
    --whatsapp-shadow: rgba(37, 211, 102, 0.4);
    --whatsapp-btn-size: 56px;
    --whatsapp-icon-size: 28px;
    --whatsapp-z-index: 9999;
    
    /* Animation timing functions */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-in-out-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out-smooth: cubic-bezier(0, 0, 0.2, 1);
}

/* ===== BASE STYLES ===== */
.whatsapp-button {
    position: fixed;
    z-index: var(--whatsapp-z-index);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    will-change: transform, box-shadow;
}

/* WhatsApp SVG Icon */
.whatsapp-button svg {
    width: var(--whatsapp-icon-size);
    height: var(--whatsapp-icon-size);
    fill: #ffffff;
    flex-shrink: 0;
    transition: transform 0.4s var(--ease-out-expo);
}

/* ===== MOBILE STYLES (Default) ===== */
/* Simple, clean circular button - top right on mobile */
.whatsapp-button {
    top: 25px;
    right: 20px;
    /* Account for safe areas on iPhones */
    top: calc(25px + env(safe-area-inset-top, 0px));
    right: calc(20px + env(safe-area-inset-right, 0px));
    width: var(--whatsapp-btn-size);
    height: var(--whatsapp-btn-size);
    background: var(--whatsapp-green);
    border-radius: 50%;
    box-shadow: 
        0 4px 12px var(--whatsapp-shadow),
        0 2px 4px rgba(0, 0, 0, 0.1);
    transition: 
        transform 0.4s var(--ease-out-expo),
        box-shadow 0.4s var(--ease-out-smooth),
        background-color 0.3s var(--ease-in-out-smooth);
}

/* Mobile hover/active state */
.whatsapp-button:hover,
.whatsapp-button:focus {
    background: var(--whatsapp-green-hover);
    transform: scale(1.08);
    box-shadow: 
        0 8px 24px var(--whatsapp-shadow),
        0 4px 8px rgba(0, 0, 0, 0.12);
}

.whatsapp-button:active {
    transform: scale(0.92);
    transition: transform 0.15s var(--ease-out-smooth);
}

/* Hide desktop text on mobile */
.whatsapp-button .whatsapp-text {
    display: none;
}

/* Subtle pulse animation for mobile */
@keyframes whatsapp-pulse {
    0% {
        box-shadow: 
            0 4px 12px var(--whatsapp-shadow),
            0 0 0 0 rgba(37, 211, 102, 0.5);
    }
    50% {
        box-shadow: 
            0 4px 12px var(--whatsapp-shadow),
            0 0 0 10px rgba(37, 211, 102, 0);
    }
    100% {
        box-shadow: 
            0 4px 12px var(--whatsapp-shadow),
            0 0 0 0 rgba(37, 211, 102, 0);
    }
}

.whatsapp-button {
    animation: whatsapp-pulse 2.8s var(--ease-in-out-smooth) infinite;
}

/* Pause animation on hover for better UX */
.whatsapp-button:hover {
    animation-play-state: paused;
}

/* ===== DESKTOP STYLES ===== */
@media (min-width: 769px) {
    .whatsapp-button {
        /* Bottom-right position on desktop */
        top: auto;
        bottom: 30px;
        right: 30px;
        
        /* Pill shape that expands on hover */
        width: var(--whatsapp-btn-size);
        height: var(--whatsapp-btn-size);
        border-radius: 28px;
        padding: 0 16px;
        gap: 0;
        overflow: hidden;
        
        /* Smooth transitions - carefully tuned for clean exit */
        transition: 
            width 0.45s var(--ease-out-expo),
            padding 0.4s var(--ease-out-expo),
            gap 0.35s var(--ease-out-expo),
            background-color 0.3s var(--ease-in-out-smooth),
            box-shadow 0.4s var(--ease-out-smooth),
            transform 0.4s var(--ease-out-expo),
            border-radius 0.4s var(--ease-out-expo);
        
        /* Disable pulse animation on desktop */
        animation: none;
    }

    /* Desktop text styling */
    .whatsapp-button .whatsapp-text {
        display: block;
        color: #ffffff;
        font-family: nb, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        font-size: 14px;
        font-weight: 500;
        white-space: nowrap;
        opacity: 0;
        max-width: 0;
        overflow: hidden;
        padding-right: 0;
        /* Staggered timing for smooth collapse */
        transition: 
            opacity 0.25s var(--ease-out-smooth),
            max-width 0.4s var(--ease-out-expo) 0.05s,
            padding-right 0.35s var(--ease-out-expo);
        order: -1; /* Text appears before icon */
    }

    /* Desktop hover - expand to pill */
    .whatsapp-button:hover {
        width: auto;
        padding: 0 22px;
        gap: 12px;
        transform: scale(1.03);
        border-radius: 30px;
        box-shadow: 
            0 10px 30px var(--whatsapp-shadow),
            0 6px 12px rgba(0, 0, 0, 0.12),
            0 0 25px rgba(37, 211, 102, 0.25);
        /* Slightly faster on hover-in for responsiveness */
        transition: 
            width 0.38s var(--ease-out-expo),
            padding 0.35s var(--ease-out-expo),
            gap 0.3s var(--ease-out-expo),
            background-color 0.25s var(--ease-in-out-smooth),
            box-shadow 0.35s var(--ease-out-smooth),
            transform 0.35s var(--ease-out-back),
            border-radius 0.35s var(--ease-out-expo);
    }

    .whatsapp-button:hover .whatsapp-text {
        opacity: 1;
        max-width: 220px;
        padding-right: 2px;
        /* Faster fade-in, delayed max-width for smooth reveal */
        transition: 
            opacity 0.3s var(--ease-out-smooth) 0.1s,
            max-width 0.35s var(--ease-out-expo) 0.05s,
            padding-right 0.3s var(--ease-out-expo) 0.05s;
    }

    .whatsapp-button:hover svg {
        transform: scale(1.12) rotate(5deg);
        transition: transform 0.35s var(--ease-out-back);
    }
    
    /* Clean exit animation for icon */
    .whatsapp-button:not(:hover) svg {
        transform: scale(1) rotate(0deg);
        transition: transform 0.4s var(--ease-out-expo);
    }

    /* Desktop focus state for accessibility */
    .whatsapp-button:focus {
        outline: 2px solid #ffffff;
        outline-offset: 3px;
    }
    
    .whatsapp-button:focus:not(:hover) {
        box-shadow: 
            0 4px 12px var(--whatsapp-shadow),
            0 2px 4px rgba(0, 0, 0, 0.1),
            0 0 0 4px rgba(37, 211, 102, 0.3);
    }

    .whatsapp-button:active {
        transform: scale(0.97);
        transition: transform 0.12s var(--ease-out-smooth);
    }

    /* Desktop tooltip - positioned to the left of button */
    .whatsapp-button::before {
        content: 'Chat with us';
        position: absolute;
        right: calc(100% + 14px);
        top: 50%;
        transform: translateY(-50%) translateX(8px);
        background: #333;
        color: #fff;
        font-family: nb, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        font-size: 12px;
        font-weight: 500;
        padding: 8px 14px;
        border-radius: 8px;
        white-space: nowrap;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: 
            opacity 0.3s var(--ease-out-smooth),
            visibility 0.3s var(--ease-out-smooth),
            transform 0.3s var(--ease-out-expo);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    }

    /* Tooltip arrow - pointing right */
    .whatsapp-button::after {
        content: '';
        position: absolute;
        right: calc(100% + 8px);
        top: 50%;
        transform: translateY(-50%) translateX(4px);
        border: 6px solid transparent;
        border-left-color: #333;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: 
            opacity 0.3s var(--ease-out-smooth),
            visibility 0.3s var(--ease-out-smooth),
            transform 0.3s var(--ease-out-expo);
    }

    /* Hide tooltip on hover (when pill expands) */
    .whatsapp-button:hover::before,
    .whatsapp-button:hover::after {
        opacity: 0;
        visibility: hidden;
    }

    /* Tooltip show state with smooth slide-in */
    .whatsapp-button.show-tooltip::before {
        opacity: 1;
        visibility: visible;
        transform: translateY(-50%) translateX(0);
    }
    
    .whatsapp-button.show-tooltip::after {
        opacity: 1;
        visibility: visible;
        transform: translateY(-50%) translateX(0);
    }
}

/* ===== TABLET SPECIFIC ADJUSTMENTS ===== */
@media (min-width: 769px) and (max-width: 1024px) {
    .whatsapp-button {
        bottom: 25px;
        right: 25px;
        --whatsapp-btn-size: 52px;
        --whatsapp-icon-size: 26px;
    }
}

/* ===== LARGE DESKTOP ===== */
@media (min-width: 1400px) {
    .whatsapp-button {
        bottom: 35px;
        right: 35px;
        --whatsapp-btn-size: 60px;
        --whatsapp-icon-size: 30px;
    }

    .whatsapp-button .whatsapp-text {
        font-size: 15px;
    }
}

/* ===== REDUCED MOTION PREFERENCE ===== */
@media (prefers-reduced-motion: reduce) {
    .whatsapp-button {
        animation: none !important;
        transition: 
            background-color 0.15s ease,
            box-shadow 0.15s ease !important;
    }

    .whatsapp-button svg,
    .whatsapp-button .whatsapp-text {
        transition: opacity 0.15s ease !important;
    }

    .whatsapp-button::before,
    .whatsapp-button::after {
        transition: opacity 0.15s ease !important;
    }
}

/* ===== LANDSCAPE MODE ADJUSTMENTS ===== */
@media (max-width: 768px) and (orientation: landscape) {
    .whatsapp-button {
        --whatsapp-btn-size: 48px;
        --whatsapp-icon-size: 24px;
        top: calc(15px + env(safe-area-inset-top, 0px));
        right: calc(15px + env(safe-area-inset-right, 0px));
    }
}

/* ===== SMALL MOBILE DEVICES ===== */
@media (max-width: 375px) {
    .whatsapp-button {
        --whatsapp-btn-size: 50px;
        --whatsapp-icon-size: 25px;
        top: calc(20px + env(safe-area-inset-top, 0px));
        right: calc(15px + env(safe-area-inset-right, 0px));
    }
}

/* ===== PRINT STYLES - Hide button ===== */
@media print {
    .whatsapp-button {
        display: none !important;
    }
}