/* ========================================
   Base - リセット・基本設定
======================================== */

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

:root {
    /* カラー設定 */
    --color-primary: #1a4b8c;
    --color-primary-dark: #0d3a6e;
    --color-primary-light: #2a6bb8;
    --color-secondary: #c8a45c;
    --color-secondary-dark: #b8944c;
    --color-accent: #e63946;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-bg: #ffffff;
    --color-bg-light: #f8f9fa;
    --color-bg-gray: #f0f0f0;
    --color-bg-dark: #1a1a1a;
    --color-border: #e0e0e0;
    --color-border-light: #eeeeee;
    --color-dark: #1a1a1a;
    --color-dark-gray: #333333;
    --color-gray: #666666;
    --color-light-gray: #999999;
    --color-bg-cream: #f9f8f6;
    --color-corporate: #006400;
    --color-corporate-light: #007a00;
    --color-corporate-dark: #005000;

    /* フォント */
    --font-primary: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
    --font-heading: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
    --font-en: "Cormorant Garamond", "Times New Roman", serif;

    /* サイズ */
    --container-width: 1000px;
    --container-padding: 20px;
    --container-narrow: 900px;
    --header-height: 80px;
    --header-height-sp: 60px;

    /* 余白 */
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 20px;
    --spacing-lg: 30px;
    --spacing-xl: 50px;
    --spacing-xxl: 80px;

    /* トランジション */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;

    /* シャドウ */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);

    /* 角丸 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

@media screen and (min-width: 1200px) {
    :root {
        --container-width: 1100px;
    }
}

@media screen and (min-width: 1400px) {
    :root {
        --container-width: 1200px;
    }
}

html {
    font-size: 62.5%;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: 1.6rem;
    line-height: 1.8;
    color: var(--color-text);
    background-color: var(--color-bg);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ========================================
   タイポグラフィ
======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.4;
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

h1 { font-size: 3.6rem; }
h2 { font-size: 3.0rem; }
h3 { font-size: 2.4rem; }
h4 { font-size: 2.0rem; }
h5 { font-size: 1.8rem; }
h6 { font-size: 1.6rem; }

p {
    margin-top: 0;
    margin-bottom: 1.5em;
}

p:last-child {
    margin-bottom: 0;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
}

a:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

img {
    max-width: 100%;
    height: auto;
    vertical-align: middle;
    border: 0;
}

ul, ol {
    margin: 0 0 1.5em;
    padding-left: 1.5em;
}

li {
    margin-bottom: 0.5em;
}

/* ========================================
   フォーム基本
======================================== */
input,
textarea,
select,
button {
    font-family: inherit;
    font-size: inherit;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="search"],
input[type="password"],
textarea,
select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-bg);
    transition: var(--transition);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26, 75, 140, 0.1);
}

textarea {
    resize: vertical;
    min-height: 150px;
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

/* ========================================
   テーブル基本
======================================== */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-lg);
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

th {
    background-color: var(--color-bg-light);
    font-weight: 600;
}

/* ========================================
   ユーティリティ
======================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.clearfix::after {
    content: '';
    display: table;
    clear: both;
}