/*
Theme Name: Nisshin Telecom
Theme URI: https://nisshin-telecom.com
Author: Nisshin Telecom
Author URI: https://nisshin-telecom.com
Description: 日新テレコム株式会社のコーポレートサイト用WordPressテーマ。IT・コンサルティング企業向けのクリーンでプロフェッショナルなデザイン。
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: nisshin-telecom
Tags: corporate, business, consulting, it, modern, responsive, clean
*/

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

:root {
    --primary-color: #0066cc;
    --secondary-color: #003366;
    --accent-color: #00a0e9;
    --text-color: #333333;
    --text-light: #666666;
    --bg-light: #f5f5f5;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --max-width: 1200px;
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
}

body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--bg-white);
}

/* ============================================
   タイポグラフィ
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: 1.5rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-color);
}

/* ============================================
   レイアウト
   ============================================ */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.site-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.site-content {
    flex: 1;
}

/* ============================================
   ヘッダー
   ============================================ */
.site-header {
    background-color: var(--bg-white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.site-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.site-logo a {
    color: var(--secondary-color);
}

/* ============================================
   ナビゲーション
   ============================================ */
.main-navigation ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.main-navigation a {
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.main-navigation a:hover {
    color: var(--primary-color);
}

.main-navigation a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.main-navigation a:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
}

/* ============================================
   ヒーローセクション
   ============================================ */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 5rem 0;
    text-align: center;
}

.hero-content h1 {
    color: white;
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 4px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border-color: white;
}

.btn-secondary:hover {
    background-color: white;
    color: var(--primary-color);
}

/* ============================================
   事業内容セクション
   ============================================ */
.services-section {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-title p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.service-card h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.service-card p {
    color: var(--text-light);
    margin-bottom: 0;
}

/* ============================================
   コンテンツエリア
   ============================================ */
.content-area {
    padding: 3rem 0;
}

.entry-content {
    max-width: 800px;
    margin: 0 auto;
}

.entry-header {
    margin-bottom: 2rem;
    text-align: center;
}

.entry-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.entry-meta {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ============================================
   フッター
   ============================================ */
.site-footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-widget h3 {
    color: white;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.footer-widget ul {
    list-style: none;
}

.footer-widget a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-widget a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

/* ============================================
   レスポンシブデザイン
   ============================================ */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .main-navigation {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-white);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        padding: 1rem;
    }

    .main-navigation.active {
        display: block;
    }

    .main-navigation ul {
        flex-direction: column;
        gap: 0;
    }

    .main-navigation li {
        border-bottom: 1px solid var(--border-color);
    }

    .main-navigation a {
        display: block;
        padding: 1rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 3rem 0;
    }

    .hero-content h1 {
        font-size: 1.75rem;
    }

    .btn {
        padding: 0.625rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* ============================================
   検索フォーム
   ============================================ */
.search-form {
    display: flex;
    gap: 0.5rem;
    max-width: 500px;
    margin: 0 auto;
}

.search-field {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.search-field:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-submit {
    padding: 0.75rem 1.5rem;
}

/* ============================================
   ページネーション
   ============================================ */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin: 3rem 0;
}

.pagination .page-numbers {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-color);
    transition: all 0.3s ease;
}

.pagination .page-numbers:hover,
.pagination .page-numbers.current {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* ============================================
   投稿ナビゲーション
   ============================================ */
.post-navigation {
    margin: 3rem 0;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.nav-links {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
}

.nav-previous,
.nav-next {
    flex: 1;
}

.nav-previous a,
.nav-next a {
    display: block;
    padding: 1rem;
    background-color: var(--bg-light);
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.nav-previous a:hover,
.nav-next a:hover {
    background-color: var(--primary-color);
    color: white;
}

/* ============================================
   投稿メタ情報
   ============================================ */
.entry-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.entry-meta span {
    display: inline-block;
}

.post-tags {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.post-tags a {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    margin: 0.25rem;
    background-color: var(--bg-light);
    border-radius: 4px;
    font-size: 0.9rem;
}

.post-tags a:hover {
    background-color: var(--primary-color);
    color: white;
}

/* ============================================
   サイドバー
   ============================================ */
.widget-area {
    margin-top: 3rem;
}

.widget {
    margin-bottom: 2rem;
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: 8px;
}

.widget-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.widget ul {
    list-style: none;
}

.widget li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.widget li:last-child {
    border-bottom: none;
}

/* ============================================
   画像スタイル
   ============================================ */
.aligncenter {
    display: block;
    margin: 2rem auto;
    max-width: 100%;
    height: auto;
}

.alignleft {
    float: left;
    margin: 0 2rem 1rem 0;
}

.alignright {
    float: right;
    margin: 0 0 1rem 2rem;
}

/* ============================================
   コメント
   ============================================ */
.comments-area {
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-color);
}

.comment-list {
    list-style: none;
    margin-bottom: 2rem;
}

.comment {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: var(--bg-light);
    border-radius: 8px;
}

.comment-author {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.comment-meta {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.comment-content {
    margin-bottom: 1rem;
}

/* ============================================
   ユーティリティクラス
   ============================================ */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.screen-reader-text {
    clip: rect(1px, 1px, 1px, 1px);
    position: absolute !important;
    height: 1px;
    width: 1px;
    overflow: hidden;
}