/* Global Styles & Design System Tokens */
@import url('https://fonts.loli.net/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root {
    --font-stack: 'Helvetica Neue', Helvetica, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --transition-slow: 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-stack);
    background-color: var(--color-bg);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Minimalist Scrollbar */
::-webkit-scrollbar {
    width: 5px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.15);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background-color: rgba(0, 0, 0, 0.3);
}

/* Custom Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes gentlePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.85; }
}

.animate-fade-in {
    animation: fadeIn 1.5s ease-out forwards;
}

.animate-slide-up {
    opacity: 0;
    animation: slideUp 1s ease-out forwards;
}

.delay-100 { animation-delay: 100ms; }
.delay-300 { animation-delay: 300ms; }
.delay-500 { animation-delay: 500ms; }
.delay-700 { animation-delay: 700ms; }

/* Image & Interaction Effects */
.img-wrapper {
    overflow: hidden;
    position: relative;
}

.img-zoom {
    transition: transform var(--transition-slow);
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.img-wrapper:hover .img-zoom {
    transform: scale(1.05);
}

.hover-overlay {
    background: rgba(0, 0, 0, 0.2);
    transition: opacity 0.5s ease;
}

/* Typography Utilities */
.text-balance {
    text-wrap: balance;
}

.tracking-elegant {
    letter-spacing: 0.15em;
}

/* Utilities */
.aspect-portrait {
    aspect-ratio: 3 / 4;
}

.bg-grain {
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 9999;
}

::selection {
    background-color: #f3f4f6;
    color: #000;
}