@import url('https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css');

/* Fine Sand Texture - 细腻磨砂微粒主题 */
:root {
    --sand-bg: #f9f7f1;
    --sand-dark: #2c2a26;
    --text-main: #3d3b38;
    --text-muted: #6b6863;
    --accent-color: #d4a373;
    --accent-hover: #bc8a5f;
    --card-bg: #ffffff;
    --border-color: #eae6db;
}

body {
    background-color: var(--sand-bg);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    position: relative;
}

/* 磨砂微颗粒背景覆盖 */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.25;
    /* Performance Optimization: Removed heavy SVG noise filter */
    /* background-image: radial-gradient(#000 1px, transparent 1px);
    background-size: 12px 12px;
    opacity: 0.05; */
}

.sand-nav {
    background-color: rgba(249, 247, 241, 0.9);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    transform: translateZ(0);
    will-change: backdrop-filter, transform;
    border-bottom: 1px solid var(--border-color);
}

.sand-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
    will-change: transform, box-shadow, border-color;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.sand-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
}

.sand-btn {
    background-color: var(--accent-color);
    color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(212, 163, 115, 0.3);
    will-change: transform, box-shadow, border-color;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease, border-color 0.3s ease, opacity 0.3s ease, color 0.3s ease;
}

.sand-btn:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 4px 15px rgba(188, 138, 95, 0.4);
}

.sand-btn-outline {
    background-color: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease, border-color 0.3s ease, opacity 0.3s ease, color 0.3s ease;
}

.sand-btn-outline:hover {
    background-color: var(--accent-color);
    color: #fff;
}

.sand-footer {
    background-color: var(--sand-dark);
    color: #dcd8c6;
    position: relative;
}

/* 消除刺眼高光，强调柔和 */
img {
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
}

.text-accent {
    color: var(--accent-color);
}