/* ==================== BASE & VARIABLES ==================== */
:root {
    --bg: #111217;
    --panel: #181b1f;
    --border: #2a2e39;
    --text: #d8d9da;
    --text-muted: #8e8e8e;
    --green: #73bf69;
    --blue: #5794f2;
    --orange: #ff9830;
    --red: #f2495c;
    --purple: #b877d9;
    --yellow: #fade2a;
}

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

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    min-height: 100vh;
    line-height: 1.5;
}

/* ==================== LAYOUT ==================== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.panel {
    background-color: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
}

/* ==================== TYPOGRAPHY ==================== */
.font-mono {
    font-family: 'JetBrains Mono', monospace;
}

.text-muted {
    color: var(--text-muted);
}

.label {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

/* ==================== COLORS ==================== */
.text-green { color: var(--green); }
.text-blue { color: var(--blue); }
.text-orange { color: var(--orange); }
.text-red { color: var(--red); }
.text-purple { color: var(--purple); }
.text-yellow { color: var(--yellow); }
.text-white { color: white; }

.bg-green { background-color: var(--green); }
.bg-blue { background-color: var(--blue); }
.bg-orange { background-color: var(--orange); }
.bg-red { background-color: var(--red); }
.bg-purple { background-color: var(--purple); }
.bg-yellow { background-color: var(--yellow); }

/* ==================== HEADER ==================== */
.header {
    margin-bottom: 1.5rem;
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.header-top {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.header-name {
    font-size: 2rem;
    font-weight: 700;
    color: white;
}

.header-contact {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
}

.header-contact a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.header-contact a:hover {
    color: var(--text);
}

.header-contact svg {
    width: 1rem;
    height: 1rem;
}

.header-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 0.5rem;
}

@media (min-width: 768px) {
    .header-body {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
        gap: 2rem;
    }
}

.header-about {
    color: var(--text-muted);
    max-width: 48rem;
    flex: 1;
}

.header-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    flex-shrink: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: #4080e0;
}

.btn-secondary {
    background-color: var(--border);
    color: var(--text);
}

.btn-secondary:hover {
    background-color: #3a3e49;
}

.btn svg {
    width: 1.25rem;
    height: 1.25rem;
}

/* ==================== STAT GRID ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

.stat-card {
    text-align: center;
    padding: 1rem;
}

.stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.875rem;
    font-weight: 600;
}

.stat-sublabel {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

/* ==================== CHARTS ROW (Donut + Lollipop) ==================== */
.charts-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 1024px) {
    .charts-row {
        grid-template-columns: 1fr 1fr;
    }
}

/* ==================== MEDIUM WIDGETS GRID ==================== */
.widgets-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 1024px) {
    .widgets-grid {
        grid-template-columns: 2fr 1fr;
    }
}

.widgets-column {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chart-container {
    height: 16rem;
    position: relative;
}

/* ==================== FUN STATS ROW ==================== */
.fun-stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .fun-stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ==================== SMALL WIDGETS ==================== */
.widget-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.widget-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background-color: var(--border);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
}

.cert-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    background-color: rgba(115, 191, 105, 0.2);
    color: var(--green);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
}

.cert-badge svg {
    width: 1rem;
    height: 1rem;
}

/* Certification progress bars - horizontal */
.cert-bars {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.cert-bar-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

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

.cert-bar-name {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    color: white;
}

.cert-bar-status {
    font-size: 0.75rem;
    color: var(--green);
}

.cert-bar-track {
    height: 0.5rem;
    background-color: var(--border);
    border-radius: 9999px;
    overflow: hidden;
}

.cert-bar-fill {
    height: 100%;
    background-color: var(--green);
    border-radius: 9999px;
    width: 0%;
    transition: width 1.5s ease-out;
}

/* Vertical frequency chart container */
.frequency-chart-container {
    height: 16rem;
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    padding-top: 1.5rem;
}

.frequency-bar-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
}

.frequency-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.frequency-bar-track {
    width: 100%;
    max-width: 2.5rem;
    height: 10rem;
    background-color: var(--border);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

.frequency-bar-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--green);
    border-radius: 4px;
    transition: height 1.5s ease-out;
}

.frequency-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.625rem;
    color: var(--text);
    text-align: center;
}

.progress-bar {
    height: 0.5rem;
    background-color: var(--border);
    border-radius: 9999px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-fill {
    height: 100%;
    background-color: var(--purple);
    border-radius: 9999px;
    width: 0;
    transition: width 1.5s ease-out;
}

/* ==================== SYSTEM UPTIME WIDGET ==================== */
.uptime-widget {
    font-family: 'JetBrains Mono', monospace;
}

.uptime-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.uptime-unit {
    text-align: center;
}

.uptime-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--green);
}

.uptime-label {
    font-size: 0.625rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* ==================== BIG CHARTS GRID ==================== */
.charts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 1024px) {
    .charts-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.big-chart-container {
    height: 18rem;
    position: relative;
}

/* ==================== SANKEY ==================== */
#sankeyChart {
    width: 100%;
    height: 100%;
}

.sankey-link {
    fill: none;
    stroke-opacity: 1;
    transition: stroke-opacity 0.2s;
}

.sankey-link:hover {
    stroke-opacity: 0.7;
}

.sankey-node text {
    fill: var(--text);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
}

/* ==================== ANIMATIONS ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.stat-card {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

/* Scroll-triggered animation - hidden by default */
.scroll-animate {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Chart sections - visible by default, chart.js handles internal animation */
.scroll-animate-chart {
    /* Container visible, scroll observer just triggers chart init */
}

/* Staggered animation delays */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }
.delay-6 { animation-delay: 0.6s; }
.delay-7 { animation-delay: 0.7s; }
.delay-8 { animation-delay: 0.8s; }

/* ==================== SECTION DIVIDER ==================== */
.section-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2rem 0;
}

/* ==================== RESPONSIVE ==================== */
@media (min-width: 768px) {
    .header-name {
        font-size: 2.5rem;
    }
    
    .container {
        padding: 2rem;
    }
}