/* Base Resets & Box Model */
html {
    scrollbar-gutter: stable;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: #fafafa;
    color: #1f2937;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem;
    width: 100%;
}

/* Layout Utilities */
.site-wrapper {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-grow: 1;
}

.site-container {
    width: 100%;
    max-width: 56rem; /* Equivalent to max-w-4xl */
    box-sizing: border-box;
}

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.site-header-left {
    display: flex;
    align-items: center;
}

.site-main {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-grow: 1;
}

.site-footer {
    margin-top: auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(229, 231, 235, 0.6);
    font-size: 11px;
    color: #9ca3af;
    text-align: center;
    padding-bottom: 1.5rem;
}

/* Gradient Text Effect */
.gradient-text {
    background: linear-gradient(135deg, #4f46e5, #8b5cf6, #ec4899);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Language Visibility Controls */
body.lang-en .lang-ja { display: none !important; }
body.lang-ja .lang-en { display: none !important; }

/* Language Switcher Button Container & Button Styles */
.lang-switcher-container {
    display: flex;
    align-items: center;
    background-color: rgba(229, 229, 229, 0.5);
    padding: 4px;
    border-radius: 9999px;
    border: 1px solid rgba(212, 212, 212, 0.3);
}

.lang-btn {
    padding: 4px 16px;
    font-size: 12px;
    font-weight: 700;
    border-radius: 9999px;
    transition: all 0.2s;
    border: none;
    background: transparent;
    cursor: pointer;
    color: #9ca3af;
    outline: none;
}

.lang-btn:hover {
    color: #1f2937;
}

.lang-btn.active {
    background-color: #ffffff;
    color: #1f2937;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(229, 229, 229, 0.5);
}

/* Breadcrumb Navigation Styles */
.breadcrumb-link {
    font-size: 14px;
    font-weight: 600;
    color: #6b7280;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    transition: color 0.2s;
}

.breadcrumb-link:hover {
    color: #1f2937;
}

.breadcrumb-link svg {
    width: 16px;
    height: 16px;
    margin-right: 6px;
    display: inline-block;
    vertical-align: middle;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 2.5rem;
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: -0.05em;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero p {
    color: #6b7280;
    font-size: 0.875rem;
    font-weight: 300;
    max-width: 32rem;
    line-height: 1.625;
}