/* Primitive Reset - Mobile-First CSS */
/* Clean, minimal, fast-loading design for warehouse workers */

/* === CSS Reset & Base === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors - Clean and minimal */
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #64748b;
    --success: #10b981;
    --background: #ffffff;
    --surface: #f8fafc;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;

    /* Level colors */
    --level-1: #667eea;
    --level-2: #667eea;
    --level-3: #667eea;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Typography */
    --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
}

body {
    font-family: var(--font-base);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 1.5rem;
    margin-top: var(--spacing-lg);
}

h3 {
    font-size: 1.25rem;
    margin-top: var(--spacing-md);
}

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

ul {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

li {
    margin-bottom: var(--spacing-xs);
}

strong {
    font-weight: 600;
}

em {
    color: var(--text-light);
}

/* === Layout === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* === Header === */
header {
    background-color: var(--surface);
    border-bottom: 2px solid var(--border);
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-xl);
}

header h1 {
    margin-bottom: var(--spacing-xs);
}

header h1 a {
    color: var(--text);
    text-decoration: none;
}

header h1 a:hover {
    color: var(--primary);
}

.tagline {
    color: var(--text-light);
    font-size: 1rem;
    margin: 0;
}

/* === Main Content === */
main {
    padding-bottom: var(--spacing-xl);
    min-height: 60vh;
}

section {
    margin-bottom: var(--spacing-xl);
}

/* === Level Cards === */
.levels-intro {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-light);
}

.level-cards {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.level-card {
    display: block;
    padding: var(--spacing-lg);
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: 12px;
    transition: all 0.2s ease;
    text-decoration: none;
    color: var(--text);
}

.level-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    border-color: var(--primary);
}

.level-number {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 700;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.level-card.level-1 .level-number {
    background-color: var(--level-1);
    color: white;
}

.level-card.level-2 .level-number {
    background-color: var(--level-2);
    color: white;
}

.level-card.level-3 .level-number {
    background-color: var(--level-3);
    color: white;
}

.level-card h3 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1.5rem;
}

.level-card > p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.level-card ul {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.level-card li {
    color: var(--text);
}

.cta {
    display: inline-block;
    margin-top: var(--spacing-sm);
    font-weight: 600;
    color: var(--primary);
}

/* === Level Detail Pages === */
.level-header {
    background: var(--surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border-left: 4px solid var(--primary);
    margin-bottom: var(--spacing-xl);
}

.level-header.level-1 {
    border-left-color: var(--level-1);
}

.level-header.level-2 {
    border-left-color: var(--level-2);
}

.level-header.level-3 {
    border-left-color: var(--level-3);
}

.level-badge {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 700;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background-color: var(--primary);
    color: white;
}

.level-header.level-1 .level-badge {
    background-color: var(--level-1);
}

.level-header.level-2 .level-badge {
    background-color: var(--level-2);
}

.level-header.level-3 .level-badge {
    background-color: var(--level-3);
}

.level-header h2 {
    margin: 0 0 var(--spacing-sm) 0;
}

.level-header p {
    margin: 0;
    color: var(--text-light);
}

.prerequisite {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: white;
    border-radius: 6px;
    border-left: 3px solid var(--primary);
}

/* === Protocol Sections === */
.protocol-section {
    background: var(--surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-bottom: var(--spacing-lg);
}

.protocol-section h3 {
    margin-top: 0;
    color: var(--primary);
}

.protocol-content {
    color: var(--text);
}

/* === Progress Tracking === */
.progress-tracking {
    background: var(--primary);
    color: white;
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-top: var(--spacing-xl);
}

.progress-tracking h3 {
    color: white;
    margin-top: 0;
}

.progress-tracking p,
.progress-tracking li {
    color: rgba(255, 255, 255, 0.95);
}

/* === Buttons & Navigation === */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    transition: all 0.2s ease;
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    text-decoration: none;
}

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

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    text-decoration: none;
}

.level-nav {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 2px solid var(--border);
}

.level-nav .btn {
    flex: 1;
    min-width: 150px;
}

/* === Results & FAQ === */
.results-intro {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.results-month {
    margin-bottom: var(--spacing-xl);
    background: var(--surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border-left: 4px solid var(--primary);
}

.results-month h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    color: var(--primary);
}

.results-table-container {
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.results-table th,
.results-table td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.results-table th {
    background: white;
    font-weight: 600;
    color: var(--text);
    position: sticky;
    top: 0;
}

.results-table tbody tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.results-table tbody tr:last-child td {
    border-bottom: none;
}

/* Energy dots visualization */
.energy-dots {
    display: inline-flex;
    gap: 3px;
    align-items: center;
}

.energy-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border);
    display: inline-block;
}

.energy-dots .dot.filled {
    background: var(--primary);
}

/* Month summary */
.month-summary {
    padding: var(--spacing-sm);
    background: white;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.summary-value {
    margin-top: var(--spacing-xs);
}

.summary-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-right: var(--spacing-xs);
}

/* Energy legend */
.energy-legend {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: white;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.8;
}

.energy-legend strong {
    color: var(--text-light);
    font-weight: 600;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.legend-item {
    display: inline;
    white-space: nowrap;
}

.legend-item:not(:last-child):after {
    content: " ";
}

@media (max-width: 640px) {
    .energy-legend {
        font-size: 0.85rem;
    }

    .legend-item {
        display: block;
        margin-bottom: var(--spacing-xs);
    }

    .legend-item:last-child {
        margin-bottom: 0;
    }
}

/* Weekly reflection */
.weekly-reflection {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--surface);
    border-radius: 12px;
    border-left: 4px solid var(--primary);
}

.weekly-reflection h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    color: var(--primary);
}

.weekly-reflection p {
    margin: 0;
    color: var(--text);
    line-height: 1.6;
}

.reflection-section {
    margin-bottom: var(--spacing-md);
}

.reflection-section:last-child {
    margin-bottom: 0;
}

.reflection-section strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text);
    font-weight: 600;
}

/* Sleep Chart */
.sleep-chart-section {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--surface);
    border-radius: 12px;
    border-left: 4px solid var(--primary);
}

.sleep-chart-section h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-lg);
    color: var(--primary);
}

.chart-container {
    background: white;
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    min-height: 300px;
    position: relative;
    overflow-x: auto;
}

.chart-loading {
    text-align: center;
    color: var(--text-light);
    padding: var(--spacing-xl);
}

.chart {
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    height: 250px;
    gap: 4px;
    padding: var(--spacing-lg) 0 var(--spacing-md) 0;
    min-width: 100%;
}

.chart-day {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    min-width: 40px;
    max-width: 60px;
    position: relative;
}

.chart-bar {
    width: 100%;
    background: var(--primary);
    border-radius: 4px 4px 0 0;
    transition: background 0.2s;
    position: relative;
}

.chart-bar:hover {
    background: var(--primary-dark);
}

.chart-energy {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 2px;
}

.chart-energy-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}

.chart-energy-dot.empty {
    background: var(--border);
}

.chart-label {
    margin-top: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--text-light);
    text-align: center;
    white-space: nowrap;
}

.chart-date {
    font-weight: 600;
    color: var(--text);
}

.chart-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text);
    color: white;
    padding: var(--spacing-xs);
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    margin-bottom: 4px;
}

.chart-day:hover .chart-tooltip {
    opacity: 1;
}

.chart-legend {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    font-size: 0.85rem;
    color: var(--text-light);
    flex-wrap: wrap;
}

.chart-legend .legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.legend-bar {
    width: 20px;
    height: 12px;
    background: var(--primary);
    border-radius: 2px;
    display: inline-block;
}

.legend-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    display: inline-block;
}

/* Mobile optimizations for chart */
@media (max-width: 640px) {
    .chart {
        gap: 2px;
    }

    .chart-day {
        min-width: 30px;
    }

    .chart-label {
        font-size: 0.65rem;
    }

    .chart-energy-dot {
        width: 5px;
        height: 5px;
    }
}

/* Simple Line Chart */
.sleep-line-chart {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--surface);
    border-radius: 12px;
    border-left: 4px solid var(--primary);
}

.sleep-line-chart h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-lg);
    color: var(--primary);
}

.line-chart-container {
    background: white;
    padding: var(--spacing-lg);
    border-radius: 8px;
    height: 200px;
}

#sleep-line-canvas {
    width: 100%;
    height: 100%;
}

.results-note {
    font-size: 0.85rem;
    color: var(--text-light);
    font-style: italic;
    margin-top: var(--spacing-lg);
}

/* Mobile: Stack table on small screens */
@media (max-width: 640px) {
    .results-table thead {
        display: none;
    }

    .results-table,
    .results-table tbody,
    .results-table tr,
    .results-table td {
        display: block;
        width: 100%;
    }

    .results-table tr {
        margin-bottom: var(--spacing-md);
        border: 1px solid var(--border);
        border-radius: 8px;
        padding: var(--spacing-sm);
        background: white;
    }

    .results-table td {
        padding: var(--spacing-xs) 0;
        border: none;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .results-table td:before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-light);
        margin-right: var(--spacing-sm);
    }

    .results-table tbody tr:hover {
        background: white;
    }
}

.coming-soon {
    font-style: italic;
    color: var(--text-light);
    padding: var(--spacing-lg);
    background: var(--surface);
    border-radius: 8px;
    border-left: 4px solid var(--primary);
}

.faq-item {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
}

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

.faq-item h3 {
    margin-top: 0;
}

/* === Footer === */
footer {
    background-color: var(--surface);
    border-top: 2px solid var(--border);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
    text-align: center;
}

footer p {
    margin-bottom: var(--spacing-xs);
    color: var(--text-light);
}

footer a {
    color: var(--primary);
}

.update-note {
    font-size: 0.875rem;
}

/* === Tablet Styles === */
@media (min-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .container {
        padding: 0 var(--spacing-lg);
    }

    .level-cards {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* === Desktop Styles === */
@media (min-width: 1024px) {
    h1 {
        font-size: 3rem;
    }

    .level-cards {
        grid-template-columns: repeat(3, 1fr);
    }

    .level-nav .btn {
        flex: 0 0 auto;
        min-width: 200px;
    }
}

/* === Touch Optimization === */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets for mobile */
    .btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1.1rem;
    }

    .level-card {
        padding: var(--spacing-lg) var(--spacing-md);
    }
}

/* === Print Styles === */
@media print {
    header,
    footer,
    .level-nav,
    .cta {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }

    .level-card,
    .protocol-section,
    .level-header {
        border: 1px solid #000;
        page-break-inside: avoid;
    }
}