@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600&family=Inter:wght@300;400;600&display=swap');

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background-color: #030712;
    color: #f3f4f6;
    font-family: 'Inter', 'Noto Serif SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    user-select: none;
    -webkit-user-select: none;
}

main {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair; /* 显示鼠标十字光标，方便定位点击分流 */
}

/* UI 交互控制层 */
.ui-top-bar {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 30;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    pointer-events: auto;
}

/* 高级毛玻璃重置按钮 */
.art-reset-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.625rem 1.25rem;
    border-radius: 9999px;
    background: rgba(15, 23, 42, 0.65);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(56, 189, 248, 0.25);
    box-shadow: 0 0 30px rgba(14, 165, 233, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    color: #67e8f9; /* text-cyan-300 */
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    outline: none;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.art-reset-btn:hover {
    background: rgba(30, 41, 59, 0.85);
    border-color: rgba(56, 189, 248, 0.6);
    box-shadow: 0 0 40px rgba(56, 189, 248, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.art-reset-btn:active {
    transform: translateY(1px);
}

.art-indicator-dot {
    display: inline-block;
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 9999px;
    background-color: #38bdf8;
    box-shadow: 0 0 8px rgba(56, 189, 248, 0.8);
    transition: transform 0.3s ease;
}

.art-reset-btn:hover .art-indicator-dot {
    transform: scale(1.25);
}

.art-btn-icon {
    width: 0.875rem;
    height: 0.875rem;
    opacity: 0.7;
    transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.art-reset-btn:hover .art-btn-icon {
    transform: rotate(180deg);
}

/* 优雅的视觉色彩切换菜单 (微型无感设计) */
.theme-selector {
    background: rgba(15, 23, 42, 0.65);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: 9999px;
    padding: 0.35rem 0.6rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.theme-pill {
    width: 1.1rem;
    height: 1.1rem;
    border-radius: 9999px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: transform 0.2s, border-color 0.2s;
    outline: none;
}

.theme-pill:hover {
    transform: scale(1.2);
}

.theme-pill.active {
    border-color: #ffffff;
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
}