:root {
    --primary: #c00;
    --primary-hover: #a00;
    --bg-light: #f9fafb;
    --bg-gray: #e9e9e9;
    --text-main: #333;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
}

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

body {
    font-family: Arial, sans-serif;
    background: #fff;
    color: var(--text-main);
    line-height: 1.6;
}

/* Nav */
.kth-nav {
    padding: 1rem 2rem;
    background: #fff;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

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

.kth-brand {
    font-size: 1.5rem;
    color: var(--text-main);
    text-decoration: none;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 8px;
}

.kth-brand svg {
    color: var(--primary);
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 500;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary);
}

/* Main Layout */
.kth-main {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* Top IP Info Box */
.ip-top-box {
    background: var(--bg-gray);
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.ip-top-box strong {
    font-weight: normal;
}

.ip-value-highlight {
    color: var(--primary);
    font-weight: bold;
    font-size: 1.1rem;
}

.copy-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    padding: 2px;
}

.copy-btn:hover {
    color: var(--primary);
}

.ip-location-summary {
    color: var(--text-main);
    margin-left: 10px;
}

/* Search Box */
.search-form {
    display: flex;
    max-width: 600px;
    margin: 0 auto 2rem;
    border: 1px solid var(--border-color);
}

.search-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    outline: none;
    font-size: 1rem;
}

.search-btn {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 0 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}

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

/* Details Header */
.details-header {
    background: var(--bg-gray);
    padding: 1rem;
    text-align: center;
    margin-bottom: 1.5rem;
    border-radius: 4px;
}

.details-header span {
    color: var(--primary);
}

/* Grid Layout */
.result-grid {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -0.5rem;
}

.col-data {
    width: 60%;
    padding: 0 0.5rem;
}

.col-map {
    width: 40%;
    padding: 0 0.5rem;
}

/* Table Styling */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table td {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    vertical-align: middle;
}

.data-table tr:nth-child(odd) {
    background-color: var(--bg-gray);
}

.data-table tr:nth-child(odd) td {
    border-color: #d1d5db; /* slightly darker border for gray rows */
}

.label-td {
    width: 35%;
    color: var(--text-main);
}

.value-td {
    width: 65%;
    font-weight: normal;
    word-break: break-all;
}

.font-bold {
    font-weight: bold;
}

/* Map */
.map-container {
    height: 100%;
    min-height: 400px;
    border: 1px solid var(--border-color);
}

#map {
    height: 100%;
    width: 100%;
}

/* Loading */
.kth-loading {
    display: none;
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

/* SEO Section */
.seo-section {
    margin-top: 3rem;
}

.seo-content h2 {
    text-align: center;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.seo-content h3 {
    margin: 1.5rem 0 1rem;
    color: var(--text-main);
}

.seo-content p, .seo-content ul, .seo-content ol {
    margin-bottom: 1rem;
    color: #444;
}

.seo-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.seo-table th, .seo-table td {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
}

.seo-table th {
    background: var(--bg-gray);
    text-align: left;
}

/* Footer */
.kth-footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    margin-top: 3rem;
}

.footer-links a {
    margin: 0 10px;
    color: var(--primary);
    text-decoration: none;
}

@media (max-width: 768px) {
    .col-data, .col-map {
        width: 100%;
        margin-bottom: 1.5rem;
    }
    .map-container {
        min-height: 300px;
    }
}