:root {
    --bg-main: #0f172a;
    --bg-panel: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #10b981;
    --accent-hover: #059669;
    --danger: #ef4444;
    --border: #334155;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

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

.layout {
    display: flex;
    width: 100%;
    height: 100%;
}

.sidebar {
    width: 250px;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.sidebar h2 {
    color: var(--accent);
    font-size: 1.5rem;
    letter-spacing: 1px;
}

nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    text-align: left;
    padding: 12px 16px;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 8px;
    transition: 0.2s;
}

.nav-btn:hover, .nav-btn.active {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--accent);
}

.content {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
}

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

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.header-row h1 {
    font-size: 1.8rem;
    font-weight: 600;
}

.btn-primary {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: 0.2s;
}

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

.table-container {
    background-color: var(--bg-panel);
    border-radius: 10px;
    border: 1px solid var(--border);
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    background-color: rgba(0,0,0,0.15);
}

tr:last-child td {
    border-bottom: none;
}

.col-actions {
    width: 100px;
    text-align: right;
}

td.actions {
    text-align: right;
}

.action-btn {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 4px 8px;
    border-radius: 4px;
    transition: 0.2s;
}

.action-btn:hover {
    background-color: rgba(239, 68, 68, 0.1);
}