/**
 * app-style.css
 *
 * Frontend styles for the VN Utility Apps Elementor widget.
 * Includes: 3D Flip card engine, responsive grid, tabs, buttons, QR code.
 *
 * @package VN_Utility_Apps
 */

/* ─── Google Font ────────────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ─── CSS Custom Properties ─────────────────────────────────────────────────── */
.vn-utility-apps-widget {
    --vn-font:          'Inter', sans-serif;
    --vn-card-h:        340px;
    --vn-radius:        18px;
    --vn-gap:           24px;
    --vn-transition:    0.65s cubic-bezier(0.4, 0.2, 0.2, 1);
    --vn-shadow-sm:     0 2px 8px rgba(0, 0, 0, 0.06);
    --vn-shadow-md:     0 8px 32px rgba(0, 0, 0, 0.10);
    --vn-shadow-hover:  0 16px 48px rgba(0, 0, 0, 0.14);
    --vn-front-bg:      #ffffff;
    --vn-back-bg:       #0f172a;   /* Deep navy */
    --vn-accent:        #6366f1;   /* Indigo */
    --vn-accent-2:      #8b5cf6;   /* Violet */
    --vn-tab-bg:        #f1f5f9;
    --vn-tab-active:    #6366f1;
    --vn-tab-text:      #64748b;
    --vn-ios-bg:        #1c1c1e;
    --vn-android-bg:    #01875f;
    --vn-web-bg:        #2563eb;
    font-family: var(--vn-font);
}

/* ─── Widget Wrapper ─────────────────────────────────────────────────────────── */
.vn-utility-apps-widget {
    padding: 10px 0 20px;
}

.vn-no-apps {
    color: #94a3b8;
    font-size: 15px;
    text-align: center;
    padding: 40px 0;
}

/* ─── Category Tabs ──────────────────────────────────────────────────────────── */
.vn-app-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 32px;
    align-items: center;
}

.vn-app-tab {
    font-family: var(--vn-font);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.3px;
    color: var(--vn-tab-text);
    background: var(--vn-tab-bg);
    border: 1.5px solid transparent;
    border-radius: 50px;
    padding: 8px 20px;
    cursor: pointer;
    transition: all 0.25s ease;
    white-space: nowrap;
    outline: none;
    /* No overflow:hidden — avoids ::before covering text */
}

.vn-app-tab:hover {
    border-color: var(--vn-accent);
    color: var(--vn-accent);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

/* Active tab — direct gradient background so text is always visible */
.vn-app-tab.active {
    color: #ffffff;
    background: linear-gradient(135deg, var(--vn-accent), var(--vn-accent-2));
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
    transform: translateY(-1px);
}

/* ─── App Grid ───────────────────────────────────────────────────────────────── */
.vn-app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--vn-gap);
    align-items: start;
}

/* ─── Individual Item (3D Perspective Container) ─────────────────────────────── */
.vn-app-item {
    perspective: 1100px;
    cursor: pointer;
    min-height: var(--vn-card-h);
}

/* Hidden state for tab filtering */
.vn-app-item.vn-hidden {
    display: none;
}

/* ─── Card (3D Flip Engine) ──────────────────────────────────────────────────── */
.vn-app-card {
    position: relative;
    width: 100%;
    height: var(--vn-card-h);
    transition: transform var(--vn-transition);
    transform-style: preserve-3d;
    will-change: transform;
    border-radius: var(--vn-radius);
}

/* Desktop hover flip */
@media (hover: hover) and (pointer: fine) {
    .vn-app-item:hover .vn-app-card {
        transform: rotateY(180deg);
    }
}

/* Mobile / touch: JS toggles this class */
.vn-app-item.is-flipped .vn-app-card {
    transform: rotateY(180deg);
}

/* ─── Front & Back Shared Styles ─────────────────────────────────────────────── */
.vn-app-front,
.vn-app-back {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border-radius: var(--vn-radius);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    overflow: hidden;
}

/* ─── FRONT Face ─────────────────────────────────────────────────────────────── */
.vn-app-front {
    background: var(--vn-front-bg);
    box-shadow: var(--vn-shadow-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 22px 18px 18px;
    text-align: center;
    transition: box-shadow 0.3s ease;
    /* Subtle gradient accent at top */
    background-image: linear-gradient(
        160deg,
        rgba(99, 102, 241, 0.04) 0%,
        transparent 60%
    );
}

.vn-app-item:hover .vn-app-front {
    box-shadow: var(--vn-shadow-hover);
}

/* App Icon / Logo */
.vn-app-icon {
    width: 72px;
    height: 72px;
    border-radius: 22%;  /* iOS-style squircle */
    object-fit: cover;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    flex-shrink: 0;
}

.vn-app-item:hover .vn-app-icon {
    transform: scale(1.05);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.18);
}

/* Fallback placeholder icon */
.vn-app-icon-placeholder {
    width: 88px;
    height: 88px;
    border-radius: 22%;
    background: linear-gradient(135deg, var(--vn-accent), var(--vn-accent-2));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 36px !important;
    flex-shrink: 0;
}

/* App Title */
.vn-app-title {
    font-size: 15px;
    font-weight: 700;
    color: #0f172a;
    margin: 0;
    line-height: 1.35;
    letter-spacing: -0.2px;
}

/* Short Description on FRONT */
.vn-app-desc {
    font-size: 12px;
    font-weight: 400;
    color: #64748b;
    line-height: 1.55;
    margin: 0;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    max-width: 100%;
}

/* Category label on front */
.vn-app-category {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--vn-accent);
    background: rgba(99, 102, 241, 0.08);
    border-radius: 50px;
    padding: 3px 10px;
}

/* "Flip hint" subtle arrow on front */
.vn-app-front::after {
    content: '↻';
    position: absolute;
    bottom: 10px;
    right: 14px;
    font-size: 16px;
    color: #cbd5e1;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.vn-app-item:hover .vn-app-front::after {
    opacity: 1;
}

/* ─── BACK Face ──────────────────────────────────────────────────────────────── */
.vn-app-back {
    transform: rotateY(180deg);
    background: var(--vn-back-bg);
    /* Rich gradient overlay */
    background-image: linear-gradient(
        145deg,
        #1e1b4b 0%,
        #0f172a 50%,
        #0c1a2e 100%
    );
    padding: 22px 18px 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: var(--vn-shadow-md);
    text-align: center;
}

/* (desc is now on FRONT face — no desc styles needed on back) */

/* QR Code */
.vn-app-qr {
    width: 100px;
    height: 100px;
    border-radius: 10px;
    border: 3px solid rgba(255, 255, 255, 0.10);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    background: #fff;
    padding: 4px;
    display: block;
    flex-shrink: 0;
}

/* ─── Download / Visit Buttons ───────────────────────────────────────────────── */
.vn-app-buttons {
    display: flex;
    flex-direction: column;
    gap: 7px;
    width: 100%;
}

.vn-app-btn {
    font-family: var(--vn-font);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.3px;
    color: #ffffff;
    text-decoration: none;
    border-radius: 10px;
    padding: 8px 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    transition: all 0.22s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.vn-app-btn .dashicons {
    font-size: 16px;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.vn-app-btn:hover {
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
    text-decoration: none;
}

.vn-app-btn:active {
    transform: translateY(0);
}

/* iOS — Sleek black */
.btn-ios {
    background: linear-gradient(135deg, #2c2c2e, #1c1c1e);
    border: 1px solid rgba(255,255,255,0.08);
}
.btn-ios:hover {
    background: linear-gradient(135deg, #3a3a3c, #2c2c2e);
}

/* Android — Google green */
.btn-android {
    background: linear-gradient(135deg, #34a853, #01875f);
}
.btn-android:hover {
    background: linear-gradient(135deg, #46bb64, #019e70);
}

/* Web — Royal blue */
.btn-web {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}
.btn-web:hover {
    background: linear-gradient(135deg, #60a5fa, #2563eb);
}

/* ─── Responsive ─────────────────────────────────────────────────────────────── */
@media screen and (max-width: 768px) {
    .vn-utility-apps-widget {
        --vn-card-h:  320px;
    }

    .vn-app-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 16px;
    }

    .vn-app-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none; /* Firefox */
        gap: 8px;
        margin-bottom: 24px;
        padding-bottom: 4px;
    }
    
    .vn-app-tabs::-webkit-scrollbar {
        display: none; /* Safari and Chrome */
    }

    .vn-app-tab {
        font-size: 13px;
        padding: 8px 18px;
        flex-shrink: 0;
    }

    .vn-app-icon {
        width: 68px;
        height: 68px;
    }

    .vn-app-title {
        font-size: 14px;
    }
}

@media screen and (max-width: 480px) {
    .vn-utility-apps-widget {
        --vn-card-h: 270px;
    }

    .vn-app-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    
    .vn-app-front {
        padding: 16px 12px 14px;
        gap: 6px;
    }

    .vn-app-icon {
        width: 58px;
        height: 58px;
        border-radius: 20%;
    }

    .vn-app-icon-placeholder {
        width: 58px;
        height: 58px;
        font-size: 24px !important;
        border-radius: 20%;
    }

    .vn-app-title {
        font-size: 13px;
        line-height: 1.3;
    }
    
    .vn-app-desc {
        font-size: 11px;
        -webkit-line-clamp: 2;
    }
    
    .vn-app-category {
        font-size: 9px;
        padding: 3px 8px;
        margin-top: 2px;
    }

    .vn-app-back {
        padding: 16px 12px;
        gap: 10px;
    }
    
    .vn-app-qr {
        width: 76px !important;
        height: 76px !important;
        padding: 3px;
        border-width: 2px;
    }

    .vn-app-btn {
        font-size: 11px;
        padding: 7px 10px;
        border-radius: 8px;
    }
    
    .vn-app-btn .dashicons {
        font-size: 14px;
        width: 14px;
        height: 14px;
    }
}

@media screen and (max-width: 360px) {
    .vn-app-grid {
        grid-template-columns: 1fr;
    }
    
    .vn-utility-apps-widget {
        --vn-card-h: 280px;
    }
}