/**
 * VR PWA — Frontend Styles
 *
 * Uses CSS custom properties (set via JS from backend settings)
 * for dynamic theming of the install banner and iOS coaching overlay.
 *
 * @package VR_PWA
 */

/* =================================================================
   CSS Custom Properties — Defaults (overridden at runtime via JS)
   ================================================================= */
:root {
    --vrpwa-bg-color:   #000;
    --vrpwa-text-color: #ffffff;
    --vrpwa-btn-color:  #e94560;
}

/* =================================================================
   Install Banner (Bottom bar)
   ================================================================= */
#vrpwa-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 999999;
    background: var(--vrpwa-bg-color);
    color: var(--vrpwa-text-color);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
                 Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.25);
    transform: translateY(100%);
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
}

#vrpwa-banner.vrpwa-banner--visible {
    transform: translateY(0);
}

/* Inner layout */
.vrpwa-banner__inner {
    display: flex;
    align-items: center;
    gap: 14px;
    max-width: 720px;
    margin: 0 auto;
    padding: 16px 20px;
    /* Safe area insets for notched devices */
    padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
}

/* Icon */
.vrpwa-banner__icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Text content */
.vrpwa-banner__content {
    flex: 1 1 auto;
    min-width: 0;
}

.vrpwa-banner__text {
    margin: 0;
    font-size: 14px;
    line-height: 1.45;
    color: var(--vrpwa-text-color);
}

/* Install button */
.vrpwa-banner__btn {
    flex-shrink: 0;
    appearance: none;
    -webkit-appearance: none;
    border: none;
    cursor: pointer;
    background: var(--vrpwa-btn-color);
    color: #ffffff;
    font-size: 14px;
    font-weight: 600;
    padding: 10px 22px;
    border-radius: 24px;
    transition: opacity 0.2s ease, transform 0.2s ease;
    white-space: nowrap;
}

.vrpwa-banner__btn:hover {
    opacity: 0.88;
    transform: scale(1.03);
}

.vrpwa-banner__btn:active {
    transform: scale(0.97);
}

/* Close button */
.vrpwa-banner__close {
    flex-shrink: 0;
    appearance: none;
    -webkit-appearance: none;
    border: none;
    background: none;
    color: var(--vrpwa-text-color);
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    padding: 4px 8px;
    opacity: 0.6;
    transition: opacity 0.2s ease;
}

.vrpwa-banner__close:hover {
    opacity: 1;
}

/* =================================================================
   iOS Coaching Overlay
   ================================================================= */
#vrpwa-ios-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999999;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
                 Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

#vrpwa-ios-overlay.vrpwa-ios-overlay--visible {
    opacity: 1;
}

/* Semi-transparent backdrop */
.vrpwa-overlay__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.82);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
}

/* Card */
.vrpwa-overlay__card {
    position: relative;
    width: 100%;
    max-width: 420px;
    margin: 0 16px;
    margin-bottom: calc(24px + env(safe-area-inset-bottom, 0px));
    background: var(--vrpwa-bg-color);
    color: var(--vrpwa-text-color);
    border-radius: 20px;
    padding: 32px 28px 24px;
    text-align: center;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
    animation: vrpwa-slideUp 0.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* Close button on overlay */
.vrpwa-overlay__close {
    position: absolute;
    top: 12px;
    right: 16px;
    appearance: none;
    -webkit-appearance: none;
    border: none;
    background: none;
    color: var(--vrpwa-text-color);
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s ease;
}

.vrpwa-overlay__close:hover {
    opacity: 1;
}

/* Icon in overlay */
.vrpwa-overlay__icon {
    width: 64px;
    height: 64px;
    border-radius: 14px;
    object-fit: cover;
    margin-bottom: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Title */
.vrpwa-overlay__title {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 20px;
    line-height: 1.4;
}

/* Steps */
.vrpwa-overlay__steps {
    text-align: left;
    margin-bottom: 20px;
}

.vrpwa-overlay__step {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
}

.vrpwa-overlay__step p {
    margin: 0;
    font-size: 15px;
    line-height: 1.5;
    padding-top: 3px;
}

.vrpwa-overlay__step p strong {
    color: var(--vrpwa-btn-color);
}

/* Arrow section */
.vrpwa-overlay__arrow-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding-top: 8px;
}

.vrpwa-overlay__arrow {
    color: var(--vrpwa-btn-color);
    animation: vrpwa-bounce 1.4s ease-in-out infinite;
}

.vrpwa-overlay__arrow-label {
    margin: 0;
    font-size: 13px;
    font-weight: 600;
    opacity: 0.7;
    letter-spacing: 0.02em;
}

/* =================================================================
   Keyframe Animations
   ================================================================= */
@keyframes vrpwa-slideUp {
    0% {
        opacity: 0;
        transform: translateY(40px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes vrpwa-bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(10px);
    }
}

/* =================================================================
   Responsive — smaller screens
   ================================================================= */
@media (max-width: 480px) {
    .vrpwa-banner__inner {
        padding: 12px 14px;
        padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
        gap: 10px;
    }

    .vrpwa-banner__icon {
        width: 40px;
        height: 40px;
        border-radius: 10px;
    }

    .vrpwa-banner__text {
        font-size: 13px;
    }

    .vrpwa-banner__btn {
        font-size: 13px;
        padding: 8px 16px;
    }

    .vrpwa-overlay__card {
        padding: 24px 20px 20px;
        margin: 0 10px;
        margin-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    }

    .vrpwa-overlay__title {
        font-size: 16px;
    }
}