/**
 * ========================================
 * MICRO-INTERACTIONS STYLES
 * Artistic Premium Experience CSS
 * ========================================
 */

/* ========================================
   1. PALETTE LOADING ANIMATION
   ======================================== */

.palette-loading-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #ffffff 0%, #f5f5f5 100%);
    backdrop-filter: blur(10px);
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

.palette-loading-container.fade-out {
    opacity: 0;
    pointer-events: none;
}

.palette-loader {
    position: relative;
    width: 120px;
    height: 120px;
    margin-bottom: 40px;
}

/* 调色盘基础圆 */
.palette-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    border: 2px solid rgba(100, 80, 60, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: paletteCircleRotate 8s linear infinite;
}

@keyframes paletteCircleRotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 油画颜料晕染 */
.paint-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(25px);
    opacity: 0.7;
    animation: paintBlobFlow 3s cubic-bezier(0.25, 1, 0.5, 1) infinite;
}

.blob-1 {
    width: 45px;
    height: 45px;
    background: rgba(139, 115, 85, 0.8);
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.blob-2 {
    width: 40px;
    height: 40px;
    background: rgba(212, 165, 116, 0.7);
    bottom: -8px;
    left: 20%;
    animation-delay: 0.5s;
}

.blob-3 {
    width: 35px;
    height: 35px;
    background: rgba(45, 62, 80, 0.75);
    top: 25%;
    right: -5px;
    animation-delay: 1s;
}

.blob-4 {
    width: 40px;
    height: 40px;
    background: rgba(232, 212, 196, 0.65);
    bottom: 15%;
    right: 15%;
    animation-delay: 1.5s;
}

@keyframes paintBlobFlow {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.7;
    }
    50% {
        transform: translate(var(--tx, 10px), var(--ty, -10px)) scale(0.95);
        opacity: 0.5;
    }
}

.blob-2 { --tx: -15px; --ty: 12px; }
.blob-3 { --tx: 18px; --ty: -8px; }
.blob-4 { --tx: -12px; --ty: 15px; }

.loading-text {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1rem;
    letter-spacing: 3px;
    color: rgba(26, 26, 26, 0.6);
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   2. UNDERDRAWING SCROLL EFFECT
   ======================================== */

.artwork img {
    --load-progress: 0;
    transition: filter 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

.artwork img.underdrawing-loading {
    filter: 
        grayscale(1) 
        brightness(0.95)
        contrast(1.2)
        blur(2px);
    background-image: linear-gradient(
        45deg,
        rgba(200, 200, 200, 0.3) 0%,
        rgba(220, 220, 220, 0.3) 10%,
        transparent 10%,
        transparent 20%,
        rgba(200, 200, 200, 0.3) 20%
    );
    background-size: 20px 20px;
    animation: skeletonShimmer 2s infinite;
}

.artwork img.underdrawing-loaded {
    filter: none;
    animation: paintInColor 0.8s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

@keyframes skeletonShimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

@keyframes paintInColor {
    0% {
        filter: grayscale(1) brightness(0.9) contrast(1.1);
        opacity: 0.8;
    }
    50% {
        filter: grayscale(0.5) brightness(0.95) contrast(1.05);
    }
    100% {
        filter: grayscale(0) brightness(1) contrast(1);
        opacity: 1;
    }
}

/* Curator tour styles removed per request */
/* ========================================
   PAGE TRANSITION EFFECT
   ======================================== */

body.page-transitioning {
    animation: pageTransitionOut 0.6s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

@keyframes pageTransitionOut {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(0.98);
    }
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
    /* Curator tour responsive rules removed */
    .palette-loader {
        width: 100px;
        height: 100px;
    }
}

/* ========================================
   CHIAROSCURO LIGHT (已在JS中实现)
   ======================================== */

#chiaroscuroLight {
    will-change: transform;
    transition: none;
}

#chiaroscuroLight:hover {
    filter: blur(40px) !important;
}

/* ========================================
   CANVAS TEXTURE OVERLAY ENHANCEMENT
   ======================================== */

#canvasTextureOverlay {
    mix-blend-mode: multiply;
}

/* 悬停时增强纹理 */
.artwork:hover ~ #canvasTextureOverlay {
    opacity: 0.12;
}

/* ========================================
   SMOOTH SCROLLING & ANIMATIONS
   ======================================== */

html {
    scroll-behavior: smooth;
}

/* 全局过渡缓动 - 高级感核心 */
* {
    --ease-smooth: cubic-bezier(0.25, 1, 0.5, 1);
}

/* 元素进入视图时的淡入 */
.reveal-divider {
    animation: fadeInReveal 0.8s var(--ease-smooth) forwards;
    opacity: 0;
}

@keyframes fadeInReveal {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}