:root {
    --primary-color: #0056a6;
    --secondary-color: #003366;
    --accent-color: #00a8e8;
    --warning-color: #ff6b35;
    --success-color: #4caf50;
    --danger-color: #d32f2f;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-700: #495057;
    --gray-900: #212529;
    --font-mono: 'Courier New', Consolas, monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--gray-900);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    background: white;
    border-radius: 8px;
    padding: 20px 30px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 4px solid var(--primary-color);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    height: 50px;
    width: auto;
}

.logo-text h1 {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-bottom: 4px;
}

.version {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--gray-700);
    font-weight: normal;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--gray-700);
    letter-spacing: 0.5px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--gray-100);
    border-radius: 20px;
    border: 1px solid var(--gray-300);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.status-dot.active {
    background-color: var(--success-color);
    box-shadow: 0 0 10px var(--success-color);
}

.status-text {
    font-weight: 600;
    color: var(--gray-900);
}

.node-id {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--gray-700);
    padding-left: 10px;
    border-left: 1px solid var(--gray-300);
}

/* Content Layout */
.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 20px;
    flex: 1;
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.info-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.info-card {
    background: white;
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.info-card h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--gray-200);
}

.icon {
    font-size: 1.4rem;
}

.system-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px dashed var(--gray-200);
}

.label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9rem;
}

.value {
    font-family: var(--font-mono);
    color: var(--gray-900);
    font-size: 0.9rem;
}

.security-notice {
    font-size: 0.9rem;
}

.security-notice ul {
    margin: 10px 0 10px 20px;
    color: var(--gray-700);
}

.security-notice li {
    margin: 4px 0;
}

.warning {
    color: var(--danger-color);
    font-weight: 600;
    margin-top: 15px;
    padding: 10px;
    background: #ffebee;
    border-radius: 4px;
    border-left: 3px solid var(--danger-color);
}

/* Auth Panel */
.auth-panel {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    border-top: 4px solid var(--accent-color);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-header h2 {
    color: var(--secondary-color);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 8px;
}

.auth-subtitle {
    color: var(--gray-700);
    font-size: 0.9rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-group label {
    font-weight: 600;
    color: var(--gray-900);
    font-size: 0.9rem;
}

.input-group input,
.input-group select {
    padding: 12px 16px;
    border: 2px solid var(--gray-300);
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: all 0.3s;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0,168,232,0.1);
}

.input-group small {
    color: var(--gray-700);
    font-size: 0.8rem;
    margin-top: 4px;
}

.form-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
}

.btn-login {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,86,166,0.3);
}

.btn-icon {
    font-size: 1.2rem;
}

.form-links {
    display: flex;
    align-items: center;
    gap: 10px;
}

.link {
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.9rem;
}

.link:hover {
    text-decoration: underline;
}

.separator {
    color: var(--gray-300);
}

.legal-notice {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    padding: 15px;
    background: var(--gray-100);
    border-radius: 4px;
    margin-top: 20px;
}

.legal-notice input[type="checkbox"] {
    margin-top: 4px;
}

.legal-notice label {
    font-size: 0.85rem;
    color: var(--gray-700);
    line-height: 1.4;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.metrics-card,
.activity-card,
.compliance-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.metrics-card h3,
.activity-card h3,
.compliance-card h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.1rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--gray-200);
}

.metrics {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.metric {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.metric-label {
    font-size: 0.85rem;
    color: var(--gray-700);
    display: flex;
    justify-content: space-between;
}

.metric-value {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--gray-900);
}

.metric-bar {
    height: 6px;
    background: var(--gray-200);
    border-radius: 3px;
    overflow: hidden;
}

.metric-bar .fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
    border-radius: 3px;
}

.activity-list {
    list-style: none;
}

.activity-item {
    display: flex;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px dashed var(--gray-200);
}

.activity-item:last-child {
    border-bottom: none;
}

.time {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--gray-700);
    min-width: 50px;
}

.desc {
    font-size: 0.9rem;
    color: var(--gray-900);
    flex: 1;
}

.compliance-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.compliance-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 0.9rem;
}

.compliance-item.compliant {
    background: #e8f5e9;
    color: #2e7d32;
}

.compliance-item.warning {
    background: #fff3e0;
    color: #ef6c00;
}

.check {
    font-weight: bold;
    font-size: 1.1rem;
}

/* Footer */
.footer {
    margin-top: 30px;
    padding: 20px;
    background: white;
    border-radius: 8px;
    border-top: 1px solid var(--gray-300);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.footer-left {
    flex: 2;
}

.footer-right {
    flex: 1;
    text-align: right;
}

.copyright {
    font-size: 0.8rem;
    color: var(--gray-700);
    margin-bottom: 10px;
}

.disclaimer {
    font-size: 0.75rem;
    color: var(--gray-700);
    line-height: 1.4;
}

.footer-links {
    display: flex;
    justify-content: flex-end;
    gap: 20px;
    margin-bottom: 15px;
}

.footer-link {
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.85rem;
}

.footer-link:hover {
    text-decoration: underline;
}

.footer-tech {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tech,
.timestamp {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--gray-700);
}

/* Messages */
.message {
    padding: 15px;
    border-radius: 4px;
    margin-top: 20px;
    font-size: 0.9rem;
}

.message.hidden {
    display: none;
}

.message.error {
    background: #ffebee;
    color: var(--danger-color);
    border-left: 3px solid var(--danger-color);
}

.message.success {
    background: #e8f5e9;
    color: var(--success-color);
    border-left: 3px solid var(--success-color);
}

/* Responsive */
@media (max-width: 1200px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .info-panel {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
    }
    
    .footer-right {
        text-align: left;
        width: 100%;
    }
    
    .footer-links {
        justify-content: flex-start;
    }
}