/* Variables & Reset */
:root {
    /* Primary Colors */
    --c-primary-dark: #16a085;
    --c-primary: #1abc9c;
    --c-primary-light: #e8f8f5;

    /* Neutral Colors */
    --c-dark-blue: #2c3e50;
    --c-slate-blue: #34495e;
    --c-dark-gray: #333333;
    --c-mid-gray: #555555;
    --c-light-gray: #7f8c8d;
    --c-border: #dddddd;
    --c-bg-light: #f8f9fa;
    --c-white: #ffffff;

    /* Semantic Colors */
    --c-red: #e74c3c;

    /* Spacing & Sizes */
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 32px;
    --border-radius: 8px;
    --container-width: 1200px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    background-color: var(--c-bg-light);
    color: var(--c-dark-gray);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

/* Header */
.site-header {
    background-color: var(--c-white);
    border-bottom: 1px solid var(--c-border);
    padding: 30px 0;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.header-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.site-logo-link {
    display: inline-block;
}

.site-logo-text {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--c-primary-dark);
    letter-spacing: 1px;
    line-height: 1.2;
}

.site-subtitle {
    color: var(--c-light-gray);
    font-size: 0.9rem;
    font-weight: normal;
}

/* Main Layout */
main {
    max-width: var(--container-width);
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
    flex: 1; /* For sticky footer */
}

/* Breadcrumbs */
.breadcrumb-nav {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 20px var(--spacing-md) 0;
    font-size: 0.85rem;
}

.breadcrumb-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    color: var(--c-light-gray);
}

.breadcrumb-list li + li::before {
    content: ">";
    margin: 0 8px;
    color: var(--c-border);
}

.breadcrumb-list a {
    color: var(--c-mid-gray);
    text-decoration: underline;
    text-decoration-color: transparent;
}

.breadcrumb-list a:hover {
    color: var(--c-primary);
    text-decoration-color: var(--c-primary);
}

/* Filter Section */
.filter-section {
    margin-bottom: 40px;
    text-align: center;
}

.search-box {
    margin-bottom: 20px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.search-box input {
    width: 100%;
    padding: 14px;
    border: 1px solid var(--c-border);
    border-radius: 30px;
    font-size: 1rem;
    outline: none;
    background-color: var(--c-white);
    box-shadow: 0 2px 6px rgba(0,0,0,0.03);
    transition: 0.3s;
}

.search-box input:focus {
    border-color: var(--c-primary);
    box-shadow: 0 4px 12px rgba(26, 188, 156, 0.2);
}

.category-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.tab-btn {
    background: var(--c-white);
    border: 1px solid var(--c-border);
    color: var(--c-mid-gray);
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}

.tab-btn:hover {
    background: var(--c-bg-light);
    border-color: var(--c-light-gray);
    transform: translateY(-1px);
}

.tab-btn.active {
    background: var(--c-primary);
    color: var(--c-white);
    border-color: var(--c-primary);
    box-shadow: 0 2px 8px rgba(26, 188, 156, 0.3);
}

/* Service List Layout */
.category-section {
    margin-bottom: 50px;
}

.category-section-title {
    font-size: 1.4rem;
    color: var(--c-dark-blue);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--c-primary-light);
    display: flex;
    align-items: center;
}

.category-section-title::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 24px;
    background-color: var(--c-primary);
    margin-right: 12px;
    border-radius: 3px;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.loading {
    text-align: center;
    padding: 40px;
    color: var(--c-light-gray);
}

/* Service Card */
.card {
    background: var(--c-white);
    border-radius: var(--border-radius);
    border: 1px solid var(--c-border);
    padding: 24px;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    position: relative;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
    border-color: var(--c-primary);
}

.card-category {
    font-size: 0.75rem;
    font-weight: bold;
    color: var(--c-primary-dark);
    background: var(--c-primary-light);
    padding: 4px 10px;
    border-radius: 4px;
    align-self: flex-start;
    margin-bottom: 12px;
    z-index: 2;
}

.card-title {
    font-size: 1.1rem;
    color: var(--c-dark-blue);
    margin-bottom: 6px;
    line-height: 1.4;
    font-weight: bold;
}

.card-subtitle {
    font-size: 0.85rem;
    color: var(--c-light-gray);
    margin-bottom: 16px;
    font-weight: normal;
}

.card-desc {
    font-size: 0.9rem;
    color: var(--c-mid-gray);
    margin-bottom: 24px;
    flex-grow: 1;
    line-height: 1.6;
}

/* Full Card Link */
.card-link {
    display: inline-block;
    background: var(--c-dark-blue);
    color: var(--c-white);
    text-align: center;
    padding: 12px;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: bold;
    width: 100%;
    transition: background-color 0.3s;
}

.card-link::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    border-radius: var(--border-radius);
}

.card-link:hover {
    background: var(--c-primary);
}

/* * 404 Error Page Styles 
 */
.error-main {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
}

.error-container {
    text-align: center;
    max-width: 600px;
    padding: 40px 20px;
    background: var(--c-white);
    border-radius: var(--border-radius);
    border: 1px solid var(--c-border);
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}

.error-code {
    font-size: 6rem;
    font-weight: 900;
    color: var(--c-primary-dark);
    line-height: 1;
    margin-bottom: 10px;
    font-family: Arial, sans-serif;
    opacity: 0.2;
}

.error-title {
    font-size: 1.5rem;
    color: var(--c-dark-blue);
    margin-bottom: 20px;
    font-weight: bold;
}

.error-message {
    color: var(--c-mid-gray);
    margin-bottom: 30px;
    line-height: 1.8;
}

.btn-home {
    display: inline-block;
    background-color: var(--c-primary);
    color: var(--c-white);
    padding: 14px 40px;
    border-radius: 30px;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(26, 188, 156, 0.3);
    transition: all 0.3s;
}

.btn-home:hover {
    background-color: var(--c-primary-dark);
    box-shadow: 0 6px 14px rgba(22, 160, 133, 0.4);
    transform: translateY(-2px);
}

/* * Footer 
 */
.site-footer {
    background-color: var(--c-dark-blue); /* #2c3e50 */
    color: var(--c-white);
    padding: 60px 0 20px;
    font-size: 0.9rem;
    margin-top: auto;
}

.footer-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Footer Links Area */
.footer-links {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    min-width: 120px;
}

.footer-heading {
    font-size: 1rem;
    font-weight: bold;
    color: var(--c-primary); /* #1abc9c (Mint Green) */
    margin-bottom: 16px;
    /* Removed underline border from previous version */
}

.footer-link {
    color: var(--c-white);
    font-size: 0.9rem;
    transition: color 0.3s;
    line-height: 1.6;
}

.footer-link:hover {
    color: var(--c-primary);
}

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

.copyright {
    font-size: 0.85rem;
    color: #95a5a6; /* Ash Grey */
}

/* Responsive */
@media (max-width: 768px) {
    .site-logo-text {
        font-size: 1.8rem;
    }
    .service-grid {
        grid-template-columns: 1fr;
    }
    .error-code {
        font-size: 4rem;
    }
    .error-title {
        font-size: 1.2rem;
    }
    
    /* Footer responsive */
    .footer-links {
        flex-direction: column; /* Stack vertically on small screens if needed */
        gap: 24px;
    }
}