/* 彩虹渐变背景样式 */

/* 主背景渐变 */
body {
    background: linear-gradient(
        135deg,
        rgba(255, 107, 107, 0.3) 0%,
        rgba(255, 165, 0, 0.3) 14.28%,
        rgba(255, 255, 0, 0.25) 28.56%,
        rgba(50, 205, 50, 0.3) 42.84%,
        rgba(0, 191, 255, 0.3) 57.12%,
        rgba(65, 105, 225, 0.3) 71.4%,
        rgba(147, 112, 219, 0.3) 85.68%,
        rgba(255, 105, 180, 0.3) 100%
    );
    background-size: 400% 400%;
    animation: rainbowShift 20s ease infinite;
    min-height: 100vh;
}

/* 彩虹渐变动画 */
@keyframes rainbowShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* 半透明覆盖层，增强可读性 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(2px);
    z-index: -1;
    pointer-events: none;
}

/* 搜索按钮彩虹渐变 */
.search-btn {
    background: linear-gradient(
        45deg,
        rgba(255, 107, 107, 0.8),
        rgba(255, 165, 0, 0.8),
        rgba(255, 255, 0, 0.7),
        rgba(50, 205, 50, 0.8),
        rgba(0, 191, 255, 0.8),
        rgba(65, 105, 225, 0.8),
        rgba(147, 112, 219, 0.8)
    );
    background-size: 300% 300%;
    animation: buttonRainbow 12s ease infinite;
}

@keyframes buttonRainbow {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/* 结果卡片边框彩虹渐变 */
.result-card {
    position: relative;
    overflow: hidden;
}

.result-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(
        45deg,
        rgba(255, 107, 107, 0.4),
        rgba(255, 165, 0, 0.4),
        rgba(255, 255, 0, 0.3),
        rgba(50, 205, 50, 0.4),
        rgba(0, 191, 255, 0.4),
        rgba(65, 105, 225, 0.4),
        rgba(147, 112, 219, 0.4),
        rgba(255, 107, 107, 0.4)
    );
    background-size: 400% 400%;
    animation: borderRainbow 15s linear infinite;
    border-radius: inherit;
    z-index: -1;
}

@keyframes borderRainbow {
    0% {
        background-position: 0% 50%;
    }
    100% {
        background-position: 400% 50%;
    }
}

/* 加载动画彩虹效果 */
.loading-spinner {
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid transparent;
    border-image: linear-gradient(
        45deg,
        #ff6b6b,
        #ffa500,
        #ffff00,
        #32cd32,
        #00bfff,
        #4169e1,
        #9370db
    ) 1;
    animation: spin 1s linear infinite, colorShift 3s ease infinite;
}

@keyframes colorShift {
    0%, 100% {
        filter: hue-rotate(0deg);
    }
    50% {
        filter: hue-rotate(180deg);
    }
}

/* 链接悬停彩虹效果 */
.result-link:hover {
    background: linear-gradient(
        90deg,
        rgba(255, 107, 107, 0.7),
        rgba(255, 165, 0, 0.7),
        rgba(255, 255, 0, 0.6),
        rgba(50, 205, 50, 0.7),
        rgba(0, 191, 255, 0.7),
        rgba(65, 105, 225, 0.7),
        rgba(147, 112, 219, 0.7)
    );
    background-size: 200% 200%;
    animation: linkRainbow 3s ease infinite;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes linkRainbow {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/* 标题彩虹文字效果 */
.title {
    background: linear-gradient(
        90deg,
        rgba(255, 107, 107, 0.8),
        rgba(255, 165, 0, 0.8),
        rgba(255, 255, 0, 0.7),
        rgba(50, 205, 50, 0.8),
        rgba(0, 191, 255, 0.8),
        rgba(65, 105, 225, 0.8),
        rgba(147, 112, 219, 0.8)
    );
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleRainbow 8s ease infinite;
}

@keyframes titleRainbow {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}