/* Maersk Design System Dark Theme */
:root {
    /* MDS Dark Theme Colors */
    --mds-bg-primary: rgb(20, 20, 20);
    --mds-bg-secondary: rgb(33, 33, 33);
    --mds-bg-tertiary: rgb(54, 54, 54);
    --mds-bg-strong: rgb(76, 76, 76);
    --mds-text-primary: rgb(240, 240, 240);
    --mds-text-secondary: rgb(212, 212, 212);
    --mds-text-weak: rgb(138, 138, 138);
    --mds-border-default: rgb(76, 76, 76);
    --mds-border-opacity: rgba(255, 255, 255, 0.24);
    --mds-link-color: rgb(66, 176, 213);
    
    /* Maersk Brand Colors */
    --maersk-blue: rgb(0, 143, 211);
    --maersk-light-blue: rgb(66, 176, 213);
    --maersk-success: rgb(0, 170, 136);
    --maersk-warning: rgb(255, 165, 0);
    --maersk-error: rgb(229, 62, 62);
    
    /* Chart specific colors for dark theme */
    --chart-bg: var(--mds-bg-secondary);
    --chart-surface: var(--mds-bg-tertiary);
    --chart-text: var(--mds-text-primary);
    --chart-text-muted: var(--mds-text-weak);
    --chart-border: var(--mds-border-default);
}

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

body {
    font-family: 'Maersk Headline', 'Maersk Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background-color: var(--mds-bg-primary);
    color: var(--mds-text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.header {
    background: linear-gradient(135deg, var(--maersk-blue) 0%, #005fa3 100%);
    color: white;
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--mds-border-opacity);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    font-family: 'Maersk Headline', system-ui;
}

.header p {
    font-size: 1.25rem;
    opacity: 0.95;
    font-weight: 300;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.chart-container {
    background: var(--chart-bg);
    border-radius: 12px;
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--mds-border-default);
    position: relative;
}

.chart-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--maersk-blue) 0%, var(--maersk-light-blue) 100%);
}

.chart-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--chart-text);
    text-align: center;
    font-family: 'Maersk Headline', system-ui;
}

.chart-subtitle {
    text-align: center;
    color: var(--chart-text-muted);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.demo-note {
    background: linear-gradient(135deg, var(--maersk-blue) 0%, #005fa3 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    margin: 2rem 0;
    box-shadow: 0 8px 24px rgba(0, 143, 211, 0.3);
}

.demo-note h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    font-family: 'Maersk Headline', system-ui;
}

.insights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.insight-card {
    background: var(--chart-surface);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--mds-border-default);
    border-left-width: 4px;
}

.insight-card.success { 
    border-left-color: var(--maersk-success);
    background: linear-gradient(135deg, var(--chart-surface) 0%, rgba(0, 170, 136, 0.1) 100%);
}
.insight-card.warning { 
    border-left-color: var(--maersk-warning);
    background: linear-gradient(135deg, var(--chart-surface) 0%, rgba(255, 165, 0, 0.1) 100%);
}
.insight-card.neutral { 
    border-left-color: var(--mds-text-weak);
    background: var(--chart-surface);
}

.insight-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--chart-text);
}

.insight-card p {
    font-size: 0.875rem;
    color: var(--mds-text-secondary);
    line-height: 1.5;
}

@media (max-width: 768px) {
    .header h1 { font-size: 2rem; }
    .header p { font-size: 1rem; }
    .container { padding: 1rem; }
    .chart-container { padding: 1rem; }
}