/* リセットとベーススタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2a4aad;
    --primary-light: #4a6acd;
    --primary-dark: #1a3a8d;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --text-black: #333333;
    --header-bg: var(--white);
    --footer-bg: var(--gray-800);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
    background-image: url('../images/top/top-hero-image.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-color: transparent;
    min-height: 100%;
}

body {
    /* cSpell:ignore Kaku */
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
    line-height: 1.6;
    color: var(--text-black);
    background: transparent;
    min-height: 100%;
}

body > main {
    background: transparent;
    position: relative;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px; /* モバイル: サイドに16pxの余白 */
}