:root {
    --bg-color: #F0F4F8; /* Light Blue/Grey background */
    --card-bg: #FFFFFF;
    --primary: #0055FF; /* Electric Blue */
    --primary-hover: #0044CC;
    --text-main: #000000;
    --text-sub: #555555;
    --border: #000000;
    --border-width: 3px; /* Bold Stroke */
    --shadow: 6px 6px 0px #000000; /* Hard Shadow */
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background: var(--card-bg);
    border-right: var(--border-width) solid var(--border);
    padding: 2rem;
    display: flex;
    flex-direction: column;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
    letter-spacing: -1px;
}

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

.nav-links {
    list-style: none;
}

.nav-links li {
    padding: 1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s;
}

.nav-links li:hover, .nav-links li.active {
    border: 2px solid var(--border);
    background: var(--primary);
    color: white;
    box-shadow: 4px 4px 0px var(--border);
    transform: translate(-2px, -2px);
}

/* Main Content */
.content {
    flex: 1;
    padding: 3rem;
    overflow-y: auto;
}

.section {
    display: none;
    animation: fadeIn 0.3s ease;
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

header {
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border);
    padding-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    text-transform: uppercase;
}

p {
    color: var(--text-sub);
    font-size: 0.9rem;
}

/* Cards & UI Elements */
.card {
    background: var(--card-bg);
    border: var(--border-width) solid var(--border);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 4px; /* Slight rounding */
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-sub);
    margin-bottom: 0.5rem;
}

.value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

input, select, textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border);
    background: #FAFAFA;
    font-size: 1rem;
    outline: none;
    transition: 0.2s;
}

input:focus, select:focus, textarea:focus {
    background: #E0F0FF; /* Light Blue focus */
    border-color: var(--primary);
}

.btn-primary {
    width: 100%;
    padding: 1rem;
    background: var(--primary);
    color: white;
    border: 2px solid var(--border);
    font-weight: 700;
    cursor: pointer;
    box-shadow: 4px 4px 0px var(--border);
    transition: all 0.2s;
}

.btn-primary:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--border);
}

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

th, td {
    text-align: left;
    padding: 1rem;
    border-bottom: 2px solid var(--border);
}

th {
    background: #000;
    color: #fff;
    text-transform: uppercase;
    font-size: 0.8rem;
}

td {
    font-weight: 600;
}

.endpoint-url {
    font-family: monospace;
    background: #eee;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8rem;
}