/**
 * WallVision AR — Button Styles
 * "Preview on Your Wall" trigger button for WooCommerce product pages
 *
 * Design principles:
 * - Stands out from the standard WooCommerce "Add to Cart" button
 * - Communicates AR / technology visually (gradient, camera icon)
 * - Mobile-first sizing (min 44px touch target)
 * - RTL-safe (uses logical CSS properties)
 * - Reduced motion respects user preferences
 */

/* ─── CSS Custom Properties ─── */
:root {
    --wv-btn-primary:       #1a1a2e;
    --wv-btn-secondary:     #16213e;
    --wv-btn-accent:        #0f3460;
    --wv-btn-highlight:     #e94560;
    --wv-btn-text:          #ffffff;
    --wv-btn-radius:        8px;
    --wv-btn-padding-y:     14px;
    --wv-btn-padding-x:     24px;
    --wv-btn-font-size:     1rem;
    --wv-btn-font-weight:   600;
    --wv-btn-transition:    all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --wv-btn-shadow:        0 4px 15px rgba(233, 69, 96, 0.25);
    --wv-btn-shadow-hover:  0 6px 25px rgba(233, 69, 96, 0.45);
    --wv-badge-bg:          #e94560;
    --wv-badge-text:        #ffffff;
}

/* ─── Button Wrapper ─── */
.wallvision-button-wrapper {
    margin: 16px 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
}

/* ─── Main Button ─── */
.wallvision-ar-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: var(--wv-btn-padding-y) var(--wv-btn-padding-x);
    min-height: 52px;
    min-width: 220px;
    border: none;
    border-radius: var(--wv-btn-radius);
    background: linear-gradient(
        135deg,
        var(--wv-btn-primary) 0%,
        var(--wv-btn-accent) 60%,
        #1a4a7a 100%
    );
    color: var(--wv-btn-text);
    font-size: var(--wv-btn-font-size);
    font-weight: var(--wv-btn-font-weight);
    font-family: inherit;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
    box-shadow: var(--wv-btn-shadow);
    transition: var(--wv-btn-transition);
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    white-space: nowrap;
    -webkit-appearance: none;
    appearance: none;
    letter-spacing: 0.02em;
}

/* Shimmer animation overlay */
.wallvision-ar-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        105deg,
        transparent 35%,
        rgba(255, 255, 255, 0.15) 50%,
        transparent 65%
    );
    background-size: 200% 100%;
    background-position: -100% 0;
    transition: none;
}

.wallvision-ar-button:hover::before,
.wallvision-ar-button:focus::before {
    animation: wv-shimmer 0.6s ease forwards;
}

@keyframes wv-shimmer {
    to { background-position: 200% 0; }
}

/* Accent bottom border */
.wallvision-ar-button::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--wv-btn-highlight), #ff6b8a);
    border-radius: 0 0 var(--wv-btn-radius) var(--wv-btn-radius);
    transform: scaleX(0);
    transition: transform 0.25s ease;
}

.wallvision-ar-button:hover::after,
.wallvision-ar-button:focus::after {
    transform: scaleX(1);
}

/* ─── Hover / Focus States ─── */
.wallvision-ar-button:hover,
.wallvision-ar-button:focus {
    background: linear-gradient(
        135deg,
        #22295c 0%,
        #1a4a7a 60%,
        #1f5c9a 100%
    );
    box-shadow: var(--wv-btn-shadow-hover);
    transform: translateY(-1px);
    outline: none;
    text-decoration: none;
    color: var(--wv-btn-text);
}

.wallvision-ar-button:focus-visible {
    outline: 3px solid #4a90e2;
    outline-offset: 3px;
}

.wallvision-ar-button:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(233, 69, 96, 0.3);
}

/* ─── Disabled / Loading State ─── */
.wallvision-ar-button:disabled,
.wallvision-ar-button.wv-loading {
    opacity: 0.75;
    cursor: not-allowed;
    transform: none;
    pointer-events: none;
}

.wallvision-ar-button.wv-loading .wv-btn-icon {
    animation: wv-spin 1s linear infinite;
}

/* ─── Icon ─── */
.wv-btn-icon {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.wv-btn-icon svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
}

/* ─── Button Text ─── */
.wv-btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.wv-btn-text-main {
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.wv-btn-text-sub {
    font-size: 0.72rem;
    font-weight: 400;
    opacity: 0.8;
    letter-spacing: 0.03em;
    margin-top: 1px;
}

/* ─── AR Badge ─── */
.wv-ar-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    background: var(--wv-badge-bg);
    color: var(--wv-badge-text);
    border-radius: 20px;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    line-height: 1.6;
    white-space: nowrap;
    animation: wv-pulse-badge 3s ease-in-out infinite;
}

.wv-ar-badge::before {
    content: '';
    width: 5px;
    height: 5px;
    background: #ffffff;
    border-radius: 50%;
    opacity: 0.9;
    animation: wv-dot-blink 1.5s ease-in-out infinite;
}

@keyframes wv-pulse-badge {
    0%, 100% { box-shadow: 0 0 0 0 rgba(233, 69, 96, 0.4); }
    50%       { box-shadow: 0 0 0 5px rgba(233, 69, 96, 0); }
}

@keyframes wv-dot-blink {
    0%, 100% { opacity: 0.9; }
    50%       { opacity: 0.3; }
}

/* ─── Availability Note ─── */
.wv-availability-note {
    font-size: 0.78rem;
    color: #888;
    display: flex;
    align-items: center;
    gap: 5px;
    line-height: 1.3;
}

.wv-availability-note svg {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
    opacity: 0.6;
}

/* ─── 3D Fallback Indicator ─── */
.wv-fallback-indicator {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 20px;
    font-size: 0.75rem;
    color: #666;
    font-weight: 500;
}

/* ─── Unsupported State ─── */
.wallvision-ar-button.wv-unsupported {
    background: linear-gradient(135deg, #555 0%, #333 100%);
    box-shadow: none;
    opacity: 0.6;
    cursor: not-allowed;
}

.wallvision-ar-button.wv-unsupported::after {
    display: none;
}

/* ─── Spin Utility ─── */
@keyframes wv-spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

/* ─── RTL Support ─── */
[dir="rtl"] .wallvision-button-wrapper {
    align-items: flex-end;
}

[dir="rtl"] .wv-btn-text {
    align-items: flex-end;
    text-align: right;
}

[dir="rtl"] .wv-availability-note,
[dir="rtl"] .wv-fallback-indicator {
    flex-direction: row-reverse;
}

/* ─── Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
    .wallvision-ar-button,
    .wallvision-ar-button::before,
    .wallvision-ar-button::after {
        transition: none;
        animation: none;
    }

    .wv-ar-badge,
    .wv-ar-badge::before {
        animation: none;
    }

    .wallvision-ar-button:hover::before {
        animation: none;
        background-position: 0 0;
    }
}

/* ─── Mobile Adjustments ─── */
@media (max-width: 600px) {
    .wallvision-ar-button {
        width: 100%;
        min-width: unset;
        padding: 14px 20px;
    }

    .wv-btn-text-main {
        font-size: 0.9rem;
    }
}

/* ─── High-DPI (Retina) ─── */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .wallvision-ar-button {
        -webkit-font-smoothing: antialiased;
    }
}