:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #64748b;
    --bg: #ffffff;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --glass: rgba(255, 255, 255, 0.8);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    position: relative;
    padding: 3rem 1rem;
    text-align: center;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    border-bottom: 1px solid var(--border);
}

header h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #1e293b 0%, #2563eb 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.container {
    max-width: 2000px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
}

#body {
    min-height: 600px;
    background: #fff;
    border-radius: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    margin-bottom: 3rem;
    position: relative;
    overflow: auto;
}

.site-logo {
    max-height: 200px;
    width: auto;
    display: block;
    margin: 0 auto;
}

.controls-overlay {
    position: absolute;
    top: 2rem;
    right: 2rem;
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 320px;
}

/* Content Sections */
.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
    align-items: start;
}

.info-card-column {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-list {
    margin-top: 1rem;
    padding-left: 1.25rem;
    line-height: 1.8;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.info-list li {
    margin-bottom: 0.5rem;
}

.info-card {
    padding: 2rem;
    background: #fff;
    border-radius: 20px;
    border: 1px solid var(--border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.info-card h3 {
    font-family: 'Outfit', sans-serif;
    margin-bottom: 1rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.info-card p,
.info-card div {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.info-card a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.info-card a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Hover Panel */
#hover-panel {
    position: absolute;
    font-family: 'Inter', sans-serif;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.95);
    color: var(--text-main);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 0.75rem 1rem;
    min-width: 200px;
    max-width: 400px;
    z-index: 2000;
    pointer-events: auto;
    cursor: pointer;
    user-select: none;
}

#hover-panel.hidden {
    display: none;
}

#hover-panel::after {
    content: "Click to copy";
    position: absolute;
    top: 0.5rem;
    right: 0.75rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary);
    opacity: 0.6;
}

#hover-panel.copied::after {
    content: "Text copied ✓";
    color: #10b981;
    opacity: 1;
}

#hover-panel h3 {
    color: var(--primary);
    margin-bottom: 0.35rem;
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    padding-right: 1.5rem;
}

#hover-panel .section {
    margin-bottom: 0.25rem;
    font-size: 0.8rem;
    line-height: 1.4;
}

.dark-toggle-container {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 1000;
}

.btn-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    border-radius: 99px;
    border: 1px solid var(--border);
    background: var(--glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
    color: var(--text-main);
}

.btn-toggle:hover {
    transform: scale(1.05);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

/* Language Selector */
.lang-selector {
    display: flex;
    gap: 1.25rem;
    position: fixed;
    top: 1.5rem;
    right: 12rem;
    /* Increased significantly to separate from the Mode button */
    z-index: 1000;
    background: var(--glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 0.5rem 1.5rem;
    border-radius: 99px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.lang-flag {
    font-size: 1.25rem;
    cursor: pointer;
    transition: transform 0.2s ease;
    text-decoration: none;
    display: flex;
    align-items: center;
}

.lang-flag:hover {
    transform: scale(1.3);
}

/* SVG Node Styling */
.node circle {
    fill: #fff;
    stroke: var(--primary);
    stroke-width: 2px;
    transition: all 0.3s ease;
}

.node:hover circle {
    fill: var(--primary);
    r: 10px;
}

.node text {
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 500;
}

path.link {
    fill: none;
    stroke: #0760ce;
    stroke-opacity: 0.4;
    stroke-width: 2px;
}

footer {
    text-align: center;
    padding: 4rem 1rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Dark Mode support (if the user toggles it) */
.dark-Mode {
    --bg: #0f172a;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: #1e293b;
    --card-bg: #1e293b;
    --glass: rgba(15, 23, 42, 0.8);
}

.dark-Mode header {
    background: linear-gradient(180deg, #020617 0%, #0f172a 100%);
}

.dark-Mode #body {
    background: #1e293b;
}

.dark-Mode .info-card {
    background: #1e293b;
}

.dark-Mode .btn-toggle {
    background: #1e293b;
    color: #f8fafc;
}

.dark-Mode #hover-panel {
    background: rgba(30, 41, 59, 0.95);
    border-color: #334155;
    color: #f8fafc;
}

.dark-Mode #hover-panel h3 {
    color: #60a5fa;
}

.dark-Mode .node text {
    fill: var(--text-main) !important;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 500;
}

@media (max-width: 960px) {
    .info-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .site-logo {
        max-height: 150px;
    }
}