:root {
    --primary-color: #0066ff;
    --primary-hover: #0052cc;
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --text-main: #333333;
    --text-muted: #666666;
    --border-color: #e0e0e0;
    --success-color: #00a854;
    --warning-color: #faad14;
    --danger-color: #ff4d4f;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: 'Inter', 'Noto Sans JP', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-main);
}

p {
    margin-bottom: 1rem;
}

/* Layout */
.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 60px 20px;
}

.container {
    width: 100%;
    max-width: 800px;
    background: var(--card-bg);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    position: relative;
    margin-bottom: 40px;
}

/* ==========================================================================
   Global Header & Footer
   ========================================================================== */
.site-header {
    width: 100%;
    background-color: var(--card-bg);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo .logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-main);
    transition: opacity 0.2s ease;
}

.header-logo .logo-link:hover {
    opacity: 0.8;
}

.header-logo .logo-icon {
    font-size: 1.5rem;
}

.header-logo .logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.lang-switch-modern .lang-btn {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 6px 16px;
    border: 1px solid var(--primary-color);
    border-radius: 20px;
    transition: all 0.2s ease;
    background: transparent;
}

.lang-switch-modern .lang-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

.site-footer {
    width: 100%;
    background-color: #ffffff;
    border-top: 1px solid var(--border-color);
    padding: 30px 20px;
    margin-top: auto;
    text-align: center;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}

/* Search Form */
.search-box {
    margin: 30px 0;
}

.search-form {
    display: flex;
    gap: 10px;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.search-input {
    flex: 1;
    padding: 16px 20px;
    font-size: 1.1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.search-button {
    padding: 16px 32px;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    background-color: var(--primary-color);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.search-button:hover {
    background-color: var(--primary-hover);
}

.search-button:active {
    transform: translateY(1px);
}

.clear-button {
    padding: 16px 20px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-muted);
    background-color: #e2e8f0;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.clear-button:hover {
    background-color: #cbd5e1;
    color: var(--text-main);
}

.clear-button:active {
    transform: translateY(1px);
}

/* Back Link */
.back-link {
    display: inline-block;
    margin-bottom: 20px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.back-link:hover {
    text-decoration: underline;
}

/* Whois Results container */
.result-header {
    text-align: left;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.result-header h1 {
    font-size: 2rem;
    margin-bottom: 5px;
}

.result-card {
    text-align: left;
    background: #f8fafc;
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
}

.result-row {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    padding: 10px 0;
    border-bottom: 1px solid #edf2f7;
}

.result-row:last-child {
    border-bottom: none;
}

.result-label {
    flex: 0 0 160px;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.result-value {
    flex: 1;
    font-size: 1.05rem;
    font-weight: 500;
    word-break: break-all;
}

/* Result Statuses */
.status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-right: 6px;
    margin-bottom: 6px;
    background: #e2e8f0;
    color: #475569;
}

.badge-active {
    background: #dcfce7;
    color: #166534;
}

.badge-prohibited {
    background: #fee2e2;
    color: #991b1b;
}

/* Expiry Highlight */
.expire-safe .result-value {
    color: var(--success-color);
    font-weight: 700;
}

.expire-warning .result-value {
    color: var(--warning-color);
    font-weight: 700;
}

.expire-danger .result-value {
    color: var(--danger-color);
    font-weight: 700;
}

.available-box {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    padding: 30px;
    border-radius: var(--radius-md);
    color: var(--success-color);
}

.available-box h2 {
    color: var(--success-color);
    margin-bottom: 0;
    font-size: 1.8rem;
}

/* Pre/Code Blocks (Raw Data) */
.raw-container {
    text-align: left;
    margin-top: 40px;
}

.raw-json {
    background-color: #1e1e1e;
    color: #d4d4d4;
    padding: 20px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    white-space: pre-wrap;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* Feature List (Index Page) */
.features {
    margin-top: 50px;
    text-align: left;
    background: #f8fafc;
    padding: 30px;
    border-radius: var(--radius-md);
}

.features h2 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.feature-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.feature-text {
    font-size: 0.95rem;
    color: var(--text-muted);
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    .search-form {
        flex-direction: column;
    }

    .search-button {
        width: 100%;
    }

    .result-row {
        flex-direction: column;
    }

    .result-label {
        margin-bottom: 4px;
    }
}