/**
 * VTOWP Loader Styles - Complete
 * File: assets/css/vtowp-client-loader.css
 * Version: 3.0.0
 * 
 * @package VTOWP_Client
 * @since   1.0.0.0
 * 
 * 🔥 FEATURES:
 * - 5 Spinner Styles (Ring, Pulse, Bars, Dots, Progress)
 * - Top 10 Parameters Support
 * - Ultra Glass Design
 * - Dark Mode Support
 * - 5 Sizes (XS, SM, MD, LG, XL)
 * - Highest Priority (z-index: 9999999)
 * - Accessibility Ready
 * - Performance Optimized
 */

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    --vtowp-loader-bg: rgba(15, 23, 42, 0.75);
    --vtowp-loader-box-bg: rgba(255, 255, 255, 0.97);
    --vtowp-loader-box-border: rgba(255, 255, 255, 0.3);
    --vtowp-loader-title-color: #0f172a;
    --vtowp-loader-sub-color: #64748b;
    --vtowp-loader-shadow: 0 40px 100px rgba(0, 0, 0, 0.25);
    --vtowp-loader-spinner-color-1: #3B82F6;
    --vtowp-loader-spinner-color-2: #8B5CF6;
    --vtowp-loader-spinner-color-3: #10B981;
    --vtowp-loader-blur: blur(16px);
    --vtowp-loader-border-radius: 28px;
}

/* ✅ Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --vtowp-loader-bg: rgba(0, 0, 0, 0.85);
        --vtowp-loader-box-bg: rgba(30, 41, 59, 0.97);
        --vtowp-loader-box-border: rgba(255, 255, 255, 0.08);
        --vtowp-loader-title-color: #f1f5f9;
        --vtowp-loader-sub-color: #94a3b8;
        --vtowp-loader-shadow: 0 40px 100px rgba(0, 0, 0, 0.6);
        --vtowp-loader-spinner-color-1: #60A5FA;
        --vtowp-loader-spinner-color-2: #A78BFA;
        --vtowp-loader-spinner-color-3: #34D399;
    }
}

/* ============================================
   LOADER OVERLAY - HIGHEST PRIORITY
   ============================================ */
.vtowp-client-loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--vtowp-loader-bg);
    backdrop-filter: var(--vtowp-loader-blur);
    -webkit-backdrop-filter: var(--vtowp-loader-blur);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999999 !important;
    animation: vtowp-loader-fade-in 0.3s ease;
    will-change: transform, opacity;
    padding: 20px;
    box-sizing: border-box;
    pointer-events: auto !important;
    overflow: hidden;
}

.vtowp-client-loader-overlay.active {
    display: flex !important;
}

@keyframes vtowp-loader-fade-in {
    0% { opacity: 0; }
    100% { opacity: 1; }
}

/* ============================================
   BODY LOCK
   ============================================ */
body.vtowp-loader-open {
    overflow: hidden !important;
    position: fixed !important;
    width: 100% !important;
    height: 100% !important;
    top: 0 !important;
    left: 0 !important;
}

/* ============================================
   LOADER BOX - ULTRA GLASS
   ============================================ */
.vtowp-client-loader-box {
    position: relative;
    z-index: 10000000 !important;
    background: var(--vtowp-loader-box-bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    padding: 48px 56px;
    border-radius: var(--vtowp-loader-border-radius);
    text-align: center;
    box-shadow: 
        var(--vtowp-loader-shadow),
        0 8px 32px rgba(0, 0, 0, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    border: 1px solid var(--vtowp-loader-box-border);
    min-width: 300px;
    max-width: 440px;
    animation: vtowp-loader-scale-in 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    will-change: transform, opacity;
    overflow: hidden;
    pointer-events: auto !important;
    user-select: none;
}

/* ✅ Glass Shine Effect */
.vtowp-client-loader-box::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        circle at 30% 20%,
        rgba(255, 255, 255, 0.06) 0%,
        transparent 60%
    );
    pointer-events: none;
    animation: vtowp-loader-shine 6s ease-in-out infinite;
}

@keyframes vtowp-loader-shine {
    0%, 100% { transform: translate(-10%, -10%) rotate(0deg); }
    50% { transform: translate(10%, 10%) rotate(180deg); }
}

@keyframes vtowp-loader-scale-in {
    0% { transform: scale(0.85) translateY(30px); opacity: 0; }
    100% { transform: scale(1) translateY(0); opacity: 1; }
}

/* ============================================
   1. RING SPINNER (Default)
   ============================================ */
.vtowp-client-loader-spinner-ring {
    position: relative;
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
}

.vtowp-client-loader-spinner-ring .ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 4px solid transparent;
    animation: vtowp-loader-ring-spin 1.2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    will-change: transform;
}

.vtowp-client-loader-spinner-ring .ring:nth-child(1) {
    border-top-color: var(--vtowp-loader-spinner-color-1);
    animation-delay: 0s;
}

.vtowp-client-loader-spinner-ring .ring:nth-child(2) {
    border-right-color: var(--vtowp-loader-spinner-color-2);
    animation-delay: 0.2s;
    width: 75%;
    height: 75%;
    top: 12.5%;
    left: 12.5%;
}

.vtowp-client-loader-spinner-ring .ring:nth-child(3) {
    border-bottom-color: var(--vtowp-loader-spinner-color-3);
    animation-delay: 0.4s;
    width: 50%;
    height: 50%;
    top: 25%;
    left: 25%;
}

@keyframes vtowp-loader-ring-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================
   2. PULSE SPINNER
   ============================================ */
.vtowp-client-loader-spinner-pulse {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.vtowp-client-loader-spinner-pulse .pulse {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: conic-gradient(
        from 0deg,
        var(--vtowp-loader-spinner-color-1),
        var(--vtowp-loader-spinner-color-2),
        var(--vtowp-loader-spinner-color-3),
        var(--vtowp-loader-spinner-color-1)
    );
    animation: vtowp-loader-pulse-spin 2s linear infinite;
    mask: radial-gradient(
        circle at center,
        transparent 55%,
        black 56%
    );
    -webkit-mask: radial-gradient(
        circle at center,
        transparent 55%,
        black 56%
    );
}

@keyframes vtowp-loader-pulse-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================
   3. BARS SPINNER
   ============================================ */
.vtowp-client-loader-spinner-bars {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.vtowp-client-loader-spinner-bars .bar {
    width: 8px;
    height: 40px;
    border-radius: 4px;
    background: var(--vtowp-loader-spinner-color-1);
    animation: vtowp-loader-bars 1.2s ease-in-out infinite;
    transform-origin: center;
}

.vtowp-client-loader-spinner-bars .bar:nth-child(2) {
    background: var(--vtowp-loader-spinner-color-2);
    animation-delay: 0.15s;
    height: 32px;
}

.vtowp-client-loader-spinner-bars .bar:nth-child(3) {
    background: var(--vtowp-loader-spinner-color-3);
    animation-delay: 0.3s;
    height: 48px;
}

.vtowp-client-loader-spinner-bars .bar:nth-child(4) {
    background: var(--vtowp-loader-spinner-color-2);
    animation-delay: 0.45s;
    height: 28px;
}

.vtowp-client-loader-spinner-bars .bar:nth-child(5) {
    background: var(--vtowp-loader-spinner-color-1);
    animation-delay: 0.6s;
    height: 36px;
}

@keyframes vtowp-loader-bars {
    0%, 100% { transform: scaleY(0.5); opacity: 0.3; }
    50% { transform: scaleY(1); opacity: 1; }
}

/* ============================================
   4. DOTS SPINNER
   ============================================ */
.vtowp-client-loader-spinner-dots {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.vtowp-client-loader-spinner-dots .dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--vtowp-loader-spinner-color-1);
    animation: vtowp-loader-dots 1.4s ease-in-out infinite;
}

.vtowp-client-loader-spinner-dots .dot:nth-child(2) {
    background: var(--vtowp-loader-spinner-color-2);
    animation-delay: 0.2s;
}

.vtowp-client-loader-spinner-dots .dot:nth-child(3) {
    background: var(--vtowp-loader-spinner-color-3);
    animation-delay: 0.4s;
}

@keyframes vtowp-loader-dots {
    0%, 80%, 100% { transform: scale(0); opacity: 0.3; }
    40% { transform: scale(1); opacity: 1; }
}

/* ============================================
   5. PROGRESS SPINNER
   ============================================ */
.vtowp-client-loader-progress-container {
    width: 100%;
    margin: 16px auto 0;
}

.vtowp-client-loader-progress-track {
    width: 100%;
    height: 6px;
    background: rgba(0, 0, 0, 0.08);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.vtowp-client-loader-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, 
        var(--vtowp-loader-spinner-color-1),
        var(--vtowp-loader-spinner-color-2),
        var(--vtowp-loader-spinner-color-3)
    );
    border-radius: 3px;
    transition: width 0.5s ease;
    animation: vtowp-loader-progress-shimmer 2s linear infinite;
    background-size: 200% 100%;
}

@keyframes vtowp-loader-progress-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.vtowp-client-loader-progress-text {
    font-size: 14px;
    color: var(--vtowp-loader-sub-color);
    margin-top: 8px;
    font-weight: 500;
}

/* ============================================
   LOADER TEXT
   ============================================ */
.vtowp-client-loader-title {
    color: var(--vtowp-loader-title-color);
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.3px;
    line-height: 1.3;
}

.vtowp-client-loader-sub {
    color: var(--vtowp-loader-sub-color);
    font-size: 14px;
    font-weight: 400;
    opacity: 0.8;
    line-height: 1.5;
}

.vtowp-client-loader-sub.loading::after {
    content: '';
    animation: vtowp-loader-dots-text 1.5s steps(4) infinite;
    display: inline-block;
    width: 20px;
    text-align: left;
}

@keyframes vtowp-loader-dots-text {
    0% { content: ''; }
    25% { content: '.'; }
    50% { content: '..'; }
    75% { content: '...'; }
    100% { content: ''; }
}

/* ============================================
   LOADER SIZES
   ============================================ */

/* Extra Small */
.vtowp-client-loader-overlay.xs .vtowp-client-loader-box {
    padding: 16px 20px;
    min-width: 140px;
    border-radius: 16px;
}
.vtowp-client-loader-overlay.xs .vtowp-client-loader-spinner-ring,
.vtowp-client-loader-overlay.xs .vtowp-client-loader-spinner-pulse,
.vtowp-client-loader-overlay.xs .vtowp-client-loader-spinner-bars,
.vtowp-client-loader-overlay.xs .vtowp-client-loader-spinner-dots {
    width: 32px;
    height: 32px;
    margin: 0 auto 8px;
}
.vtowp-client-loader-overlay.xs .vtowp-client-loader-spinner-bars .bar {
    width: 4px;
    height: 20px;
}
.vtowp-client-loader-overlay.xs .vtowp-client-loader-spinner-dots .dot {
    width: 8px;
    height: 8px;
}
.vtowp-client-loader-overlay.xs .vtowp-client-loader-title {
    font-size: 13px;
}
.vtowp-client-loader-overlay.xs .vtowp-client-loader-sub {
    font-size: 11px;
}
.vtowp-client-loader-overlay.xs .vtowp-client-loader-progress-track {
    height: 4px;
}

/* Small */
.vtowp-client-loader-overlay.small .vtowp-client-loader-box {
    padding: 24px 32px;
    min-width: 200px;
    border-radius: 20px;
}
.vtowp-client-loader-overlay.small .vtowp-client-loader-spinner-ring,
.vtowp-client-loader-overlay.small .vtowp-client-loader-spinner-pulse,
.vtowp-client-loader-overlay.small .vtowp-client-loader-spinner-bars,
.vtowp-client-loader-overlay.small .vtowp-client-loader-spinner-dots {
    width: 48px;
    height: 48px;
    margin: 0 auto 14px;
}
.vtowp-client-loader-overlay.small .vtowp-client-loader-spinner-bars .bar {
    width: 6px;
    height: 28px;
}
.vtowp-client-loader-overlay.small .vtowp-client-loader-spinner-dots .dot {
    width: 12px;
    height: 12px;
}
.vtowp-client-loader-overlay.small .vtowp-client-loader-title {
    font-size: 16px;
}
.vtowp-client-loader-overlay.small .vtowp-client-loader-sub {
    font-size: 12px;
}

/* Medium (Default) */
.vtowp-client-loader-overlay.medium .vtowp-client-loader-box {
    padding: 40px 48px;
    min-width: 280px;
    border-radius: 24px;
}
.vtowp-client-loader-overlay.medium .vtowp-client-loader-spinner-ring,
.vtowp-client-loader-overlay.medium .vtowp-client-loader-spinner-pulse,
.vtowp-client-loader-overlay.medium .vtowp-client-loader-spinner-bars,
.vtowp-client-loader-overlay.medium .vtowp-client-loader-spinner-dots {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
}
.vtowp-client-loader-overlay.medium .vtowp-client-loader-title {
    font-size: 18px;
}
.vtowp-client-loader-overlay.medium .vtowp-client-loader-sub {
    font-size: 14px;
}

/* Large */
.vtowp-client-loader-overlay.large .vtowp-client-loader-box {
    padding: 56px 64px;
    min-width: 360px;
    border-radius: 28px;
}
.vtowp-client-loader-overlay.large .vtowp-client-loader-spinner-ring,
.vtowp-client-loader-overlay.large .vtowp-client-loader-spinner-pulse,
.vtowp-client-loader-overlay.large .vtowp-client-loader-spinner-bars,
.vtowp-client-loader-overlay.large .vtowp-client-loader-spinner-dots {
    width: 88px;
    height: 88px;
    margin: 0 auto 28px;
}
.vtowp-client-loader-overlay.large .vtowp-client-loader-title {
    font-size: 24px;
}
.vtowp-client-loader-overlay.large .vtowp-client-loader-sub {
    font-size: 16px;
}

/* Extra Large */
.vtowp-client-loader-overlay.xl .vtowp-client-loader-box {
    padding: 72px 80px;
    min-width: 440px;
    border-radius: 32px;
}
.vtowp-client-loader-overlay.xl .vtowp-client-loader-spinner-ring,
.vtowp-client-loader-overlay.xl .vtowp-client-loader-spinner-pulse,
.vtowp-client-loader-overlay.xl .vtowp-client-loader-spinner-bars,
.vtowp-client-loader-overlay.xl .vtowp-client-loader-spinner-dots {
    width: 112px;
    height: 112px;
    margin: 0 auto 32px;
}
.vtowp-client-loader-overlay.xl .vtowp-client-loader-title {
    font-size: 28px;
}
.vtowp-client-loader-overlay.xl .vtowp-client-loader-sub {
    font-size: 18px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .vtowp-client-loader-box {
        padding: 32px 36px !important;
        min-width: 220px !important;
        max-width: 340px !important;
        border-radius: 20px !important;
    }
    .vtowp-client-loader-spinner-ring,
    .vtowp-client-loader-spinner-pulse,
    .vtowp-client-loader-spinner-bars,
    .vtowp-client-loader-spinner-dots {
        width: 56px !important;
        height: 56px !important;
        margin: 0 auto 16px !important;
    }
    .vtowp-client-loader-spinner-bars .bar {
        width: 6px !important;
        height: 32px !important;
    }
    .vtowp-client-loader-spinner-dots .dot {
        width: 12px !important;
        height: 12px !important;
    }
    .vtowp-client-loader-title {
        font-size: 17px !important;
    }
    .vtowp-client-loader-sub {
        font-size: 13px !important;
    }
}

@media (max-width: 480px) {
    .vtowp-client-loader-box {
        padding: 24px 28px !important;
        min-width: 180px !important;
        max-width: 280px !important;
        border-radius: 16px !important;
    }
    .vtowp-client-loader-spinner-ring,
    .vtowp-client-loader-spinner-pulse,
    .vtowp-client-loader-spinner-bars,
    .vtowp-client-loader-spinner-dots {
        width: 44px !important;
        height: 44px !important;
        margin: 0 auto 12px !important;
    }
    .vtowp-client-loader-spinner-bars .bar {
        width: 5px !important;
        height: 24px !important;
    }
    .vtowp-client-loader-spinner-dots .dot {
        width: 10px !important;
        height: 10px !important;
    }
    .vtowp-client-loader-title {
        font-size: 15px !important;
    }
    .vtowp-client-loader-sub {
        font-size: 12px !important;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    .vtowp-client-loader-spinner-ring .ring,
    .vtowp-client-loader-spinner-pulse .pulse,
    .vtowp-client-loader-spinner-bars .bar,
    .vtowp-client-loader-spinner-dots .dot {
        animation-duration: 2s !important;
    }
    .vtowp-client-loader-overlay,
    .vtowp-client-loader-box,
    .vtowp-client-loader-box::before {
        animation: none !important;
    }
    .vtowp-client-loader-sub.loading::after {
        animation: none !important;
        content: '...' !important;
    }
}

/* ✅ Screen Reader Only */
.vtowp-client-loader-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ============================================
   PERFORMANCE
   ============================================ */
.vtowp-client-loader-overlay,
.vtowp-client-loader-box,
.vtowp-client-loader-spinner-ring .ring,
.vtowp-client-loader-spinner-pulse .pulse,
.vtowp-client-loader-spinner-bars .bar,
.vtowp-client-loader-spinner-dots .dot {
    will-change: transform, opacity;
}

.vtowp-client-loader-spinner-ring .ring,
.vtowp-client-loader-spinner-pulse .pulse {
    transform: translateZ(0);
    backface-visibility: hidden;
}