/* ChainlessChain Loading Animation - Optimized Version */

#loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-size: 400% 400%;
    animation: gradientMove 8s ease infinite;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 99999;
    opacity: 1;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

#loading-overlay.fade-out {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* 背景渐变流动 */
@keyframes gradientMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.loading-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Logo容器 */
.loading-logo-wrapper {
    position: relative;
    width: 140px;
    height: 140px;
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-8px) scale(1.05);
    }
}

/* 阴影层 */
.loading-logo-shadow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%,
        rgba(255, 255, 255, 0.9) 0%,
        rgba(255, 182, 193, 0.4) 30%,
        rgba(186, 85, 211, 0.2) 60%,
        transparent 70%);
    filter: blur(1px);
    animation: shadowPulse 3s ease-in-out infinite;
}

@keyframes shadowPulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* Logo图片 */
.loading-logo-image {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    z-index: 2;
    box-shadow:
        inset 3px 3px 8px rgba(255, 255, 255, 0.8),
        inset -2px -2px 6px rgba(0, 0, 0, 0.1),
        0 4px 12px rgba(102, 126, 234, 0.3),
        0 8px 24px rgba(118, 75, 162, 0.25),
        0 0 20px rgba(240, 147, 251, 0.2);
    animation: logoRotate 12s linear infinite;
}

@keyframes logoRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 光泽层 */
.loading-shine {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: linear-gradient(
        135deg,
        transparent 0%,
        rgba(255, 255, 255, 0.5) 40%,
        rgba(255, 255, 255, 0.8) 50%,
        rgba(255, 255, 255, 0.5) 60%,
        transparent 100%
    );
    z-index: 3;
    opacity: 0;
    animation: shineMove 4s ease-in-out infinite;
    pointer-events: none;
}

@keyframes shineMove {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) rotate(-45deg) translateX(-120px);
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) rotate(-45deg) translateX(120px);
    }
}

/* 光环层 */
.loading-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 2px solid transparent;
    animation: ringPulse 3s ease-in-out infinite;
}

.loading-ring-1 {
    width: 160px;
    height: 160px;
    border-color: rgba(255, 182, 193, 0.6);
    animation-delay: 0s;
}

.loading-ring-2 {
    width: 180px;
    height: 180px;
    border-color: rgba(186, 85, 211, 0.4);
    animation-delay: 0.3s;
}

@keyframes ringPulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.6;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 1;
    }
}

/* 外层光晕 */
.loading-outer-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(
        circle,
        rgba(255, 255, 255, 0.2) 0%,
        rgba(186, 85, 211, 0.15) 30%,
        rgba(255, 182, 193, 0.1) 50%,
        transparent 70%
    );
    filter: blur(10px);
    animation: glowPulse 3s ease-in-out infinite;
    z-index: 0;
}

@keyframes glowPulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.15);
        opacity: 0.8;
    }
}

/* 加载文字 */
.loading-text {
    margin-top: 40px;
    color: white;
    font-size: 18px;
    font-weight: 600;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    animation: textFade 2s ease-in-out infinite;
}

@keyframes textFade {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* 进度条 */
.loading-progress {
    margin-top: 20px;
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}

.loading-progress-bar {
    height: 100%;
    background: linear-gradient(90deg,
        rgba(255, 255, 255, 0.8),
        rgba(255, 182, 193, 0.9),
        rgba(186, 85, 211, 0.8)
    );
    border-radius: 2px;
    animation: progressMove 2s ease-in-out infinite;
}

@keyframes progressMove {
    0% {
        width: 0%;
        transform: translateX(0);
    }
    50% {
        width: 70%;
    }
    100% {
        width: 100%;
        transform: translateX(0);
    }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .loading-logo-wrapper {
        width: 100px;
        height: 100px;
    }

    .loading-logo-shadow,
    .loading-logo-image,
    .loading-shine {
        width: 100px;
        height: 100px;
    }

    .loading-ring-1 {
        width: 120px;
        height: 120px;
    }

    .loading-ring-2 {
        width: 140px;
        height: 140px;
    }

    .loading-outer-glow {
        width: 160px;
        height: 160px;
    }

    .loading-text {
        font-size: 16px;
    }

    .loading-progress {
        width: 160px;
    }
}