/*
Theme Name: Seven Corporate
Theme URI: https://example.com/seven-theme
Author: Seven Inc.
Author URI: https://example.com
Description: 株式会社セブン公式コーポレートテーマ - ファッション、食品、メディア、IT、農業、貿易事業を展開する総合企業サイト
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: seven-theme
Tags: corporate, business, responsive, custom-menu, featured-images
*/

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

:root {
    --primary-color: #1a5f7a;
    --primary-dark: #134b61;
    --secondary-color: #57c5b6;
    --accent-color: #159895;
    --text-color: #333;
    --text-light: #666;
    --bg-light: #f8f9fa;
    --bg-white: #fff;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 20px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
    --max-width: 1200px;
}

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

body {
    font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--bg-white);
}

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

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

img {
    max-width: 100%;
    height: auto;
}

ul, ol {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    max-width: var(--max-width);
    margin: 0 auto;
}

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

.site-logo a {
    color: inherit;
}

/* Navigation */
.main-navigation ul {
    display: flex;
    gap: 30px;
}

.main-navigation a {
    color: var(--text-color);
    font-weight: 500;
    padding: 10px 0;
    position: relative;
}

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

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

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-color);
    margin: 5px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    padding: 100px 20px;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

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

.btn-outline {
    background: transparent;
    border: 2px solid white;
    color: white;
}

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

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

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

/* Sections */
.section {
    padding: 80px 20px;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.section-title p {
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.section-alt {
    background: var(--bg-light);
}

/* Business Cards */
.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.business-card {
    background: var(--bg-white);
    border-radius: 10px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.business-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.business-card .icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
}

.business-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.business-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    max-width: var(--max-width);
    margin: 0 auto;
}

.about-text h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-image {
    background: linear-gradient(135deg, var(--bg-light), var(--border-color));
    border-radius: 10px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
}

/* Company Info */
.company-info {
    max-width: 800px;
    margin: 0 auto;
}

.info-table {
    width: 100%;
    border-collapse: collapse;
}

.info-table tr {
    border-bottom: 1px solid var(--border-color);
}

.info-table th,
.info-table td {
    padding: 20px;
    text-align: left;
}

.info-table th {
    width: 30%;
    background: var(--bg-light);
    color: var(--primary-color);
    font-weight: 600;
}

/* Contact Section */
.contact-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.contact-form {
    background: var(--bg-white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.form-group label .required {
    color: #e74c3c;
    margin-left: 5px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 95, 122, 0.1);
}

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

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.form-checkbox input {
    width: auto;
    margin-top: 5px;
}

.form-checkbox label {
    margin-bottom: 0;
    font-weight: normal;
}

.form-submit {
    text-align: center;
}

.form-message {
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.form-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    padding: 60px 20px;
    text-align: center;
}

.page-header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.page-header p {
    opacity: 0.9;
}

/* Page Content */
.page-content {
    padding: 60px 20px;
}

.page-content .container {
    max-width: 800px;
}

.page-content h2 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin: 40px 0 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
}

.page-content h3 {
    font-size: 1.2rem;
    color: var(--text-color);
    margin: 30px 0 15px;
}

.page-content p {
    margin-bottom: 15px;
}

.page-content ul,
.page-content ol {
    margin: 15px 0;
    padding-left: 25px;
}

.page-content ul {
    list-style: disc;
}

.page-content ol {
    list-style: decimal;
}

.page-content li {
    margin-bottom: 8px;
}

/* Footer */
.site-footer {
    background: var(--primary-dark);
    color: white;
    padding: 60px 20px 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    max-width: var(--max-width);
    margin: 0 auto 40px;
}

.footer-section h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.footer-section ul li {
    margin-bottom: 10px;
}

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

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom p {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

/* 404 Page */
.error-404 {
    text-align: center;
    padding: 100px 20px;
}

.error-404 h1 {
    font-size: 8rem;
    color: var(--primary-color);
    line-height: 1;
}

.error-404 h2 {
    font-size: 1.5rem;
    margin: 20px 0;
}

.error-404 p {
    color: var(--text-light);
    margin-bottom: 30px;
}

/* News/Blog */
.news-list {
    max-width: var(--max-width);
    margin: 0 auto;
}

.news-item {
    display: flex;
    gap: 30px;
    padding: 30px 0;
    border-bottom: 1px solid var(--border-color);
}

.news-date {
    flex-shrink: 0;
    background: var(--primary-color);
    color: white;
    padding: 15px;
    border-radius: 5px;
    text-align: center;
    min-width: 80px;
}

.news-date .day {
    font-size: 1.5rem;
    font-weight: 700;
    display: block;
}

.news-date .month {
    font-size: 0.8rem;
}

.news-content h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.news-content h3 a {
    color: var(--text-color);
}

.news-content h3 a:hover {
    color: var(--primary-color);
}

.news-content p {
    color: var(--text-light);
}

/* Responsive */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .main-navigation {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        box-shadow: var(--shadow);
        display: none;
    }

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

    .main-navigation ul {
        flex-direction: column;
        padding: 20px;
        gap: 0;
    }

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

    .main-navigation a {
        display: block;
        padding: 15px 0;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

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

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

    .info-table th,
    .info-table td {
        display: block;
        width: 100%;
    }

    .info-table th {
        border-bottom: none;
        padding-bottom: 5px;
    }

    .info-table td {
        padding-top: 5px;
    }

    .news-item {
        flex-direction: column;
        gap: 15px;
    }

    .news-date {
        align-self: flex-start;
    }

    .contact-form {
        padding: 25px;
    }

    .section {
        padding: 50px 20px;
    }
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer,
    .hero-buttons,
    .contact-form {
        display: none;
    }

    body {
        font-size: 12pt;
    }
}