/* ========================================
   RESET STYLES & BASE ELEMENT STYLES
   ======================================== */

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

/* HTML & Body Base */
html {
    scroll-behavior: smooth;
    line-height: 1.15;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--surface-primary);
    font-size: 0.875rem; /* 14px for mobile-first */
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Desktop font size */
@media (min-width: 768px) {
    body {
        font-size: 1rem; /* 16px for desktop */
    }
}

/* Focus states for accessibility */
:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Links */
a {
    color: inherit;
    text-decoration: none;
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Lists */
ul, ol {
    list-style: none;
}

/* Tables */
table {
    border-collapse: collapse;
    width: 100%;
}

/* Form elements */
input, textarea, select, button {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}

/* Headings reset */
h1, h2, h3, h4, h5, h6 {
    font-weight: inherit;
    line-height: inherit;
}

/* Loading animation for images */
@keyframes shimmer {
    0% { background-position: -468px 0; }
    100% { background-position: 468px 0; }
}