:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 20px 30px;
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 28px;
    font-weight: 600;
}

.header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.user-info {
    color: var(--text-secondary);
    margin-right: 10px;
}

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card h2 {
    font-size: 22px;
    font-weight: 600;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.stat-card h3 {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: #334155;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-small {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-full {
    width: 100%;
}

/* pNode Cards */
.pnode-card {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
}

.pnode-card.online {
    border-left: 4px solid var(--success);
}

.pnode-card.offline {
    border-left: 4px solid var(--danger);
    opacity: 0.7;
}

.pnode-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.pnode-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.pnode-details p {
    margin: 8px 0;
    color: var(--text-secondary);
}

.pnode-details strong {
    color: var(--text-primary);
}

.pnode-actions {
    margin-top: 15px;
    display: flex;
    gap: 10px;
}

/* Status Badge */
.status-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
}

.status-badge.online {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.status-badge.offline {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

/* Modal */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    position: relative;
}

.close {
    color: var(--text-secondary);
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: var(--text-primary);
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 40px;
    max-width: 450px;
    width: 100%;
    border: 1px solid var(--border-color);
}

.login-card h1 {
    text-align: center;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.form-section h2 {
    margin-bottom: 20px;
    font-size: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.form-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
}

.form-footer a {
    color: var(--accent);
    text-decoration: none;
}

.form-footer a:hover {
    text-decoration: underline;
}

/* Messages */
.message {
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
}

.message.success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.message.error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}

/* Tables */
.keys-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.keys-table th,
.keys-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.keys-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
    text-transform: uppercase;
}

.keys-table code {
    background: var(--bg-primary);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
}

/* Key Display */
.key-display {
    background: var(--bg-primary);
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
}

.key-display code {
    flex: 1;
    word-break: break-all;
    font-size: 13px;
}

/* Help Text */
.help-text {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .pnode-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .pnode-actions {
        flex-direction: column;
    }
}