/* ========================================
   WFH Map — Design System
   Replicates wfhmap.com visual identity
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
    --color-primary: #db0042;
    --color-foreground: #000000;
    --color-secondary: #555555;
    --color-background: #ffffff;
    --color-body-bg: #fafafa;
    --color-border: rgba(0, 0, 0, 0.1);
    --font-body: 'Libre Franklin', sans-serif;
    --font-heading: 'IBM Plex Mono', monospace;
    --content-width: 782px;
    --wide-width: 1247px;
    --gap: min(30px, 5vw);
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-foreground);
    background-color: var(--color-body-bg);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.75rem;
}

h1 { font-size: 3rem; margin-bottom: 1.25rem; }
h2 { font-size: 1.38rem; line-height: 1.4; margin-top: 2rem; }
h3 { font-size: 1.125rem; line-height: 1.4; }

p {
    margin-bottom: 1rem;
}

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

a:hover {
    text-decoration: underline;
}

ul, ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

li {
    padding: 0.15rem 0;
}

em {
    font-style: italic;
}

strong {
    font-weight: 700;
}

hr {
    border: none;
    border-bottom: 1px solid var(--color-border);
    margin: 2rem 0;
}

/* --- Layout --- */
.content-wrapper {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 2rem var(--gap);
    background: var(--color-background);
    min-height: 60vh;
}

.content-wrapper.wide {
    max-width: var(--wide-width);
}

/* --- Header --- */
.site-header {
    background: var(--color-background);
    border-bottom: 3px solid var(--color-primary);
    position: sticky;
    top: 0;
    z-index: 300;
}

.header-inner {
    max-width: var(--wide-width);
    margin: 0 auto;
    padding: 0.75rem var(--gap);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.site-title {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
}

.site-title:hover {
    text-decoration: none;
    opacity: 0.85;
}

.site-tagline {
    max-width: var(--wide-width);
    margin: 0 auto;
    padding: 0 var(--gap) 0.5rem;
    font-size: 0.78rem;
    color: var(--color-secondary);
    line-height: 1.3;
}

.site-tagline a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.site-tagline a:hover {
    text-decoration: underline;
}

/* --- Navigation --- */
.site-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.site-nav > ul {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.site-nav a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-foreground);
    text-decoration: none;
    transition: color 0.15s ease;
    white-space: nowrap;
}

.site-nav a:hover,
.site-nav a.active {
    color: var(--color-primary);
}

/* Nav dropdown */
.nav-dropdown {
    position: relative;
}

.nav-arrow {
    font-size: 0.6em;
    vertical-align: 0.1em;
    opacity: 0.5;
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 0.35rem 0;
    padding-top: calc(0.35rem + 0.4rem); /* top padding absorbs the gap so hover stays active */
    margin-top: 0;
    min-width: 140px;
    z-index: 400;
    flex-direction: column;
    gap: 0;
}

.nav-dropdown:hover .nav-dropdown-menu {
    display: flex;
}

.nav-dropdown-menu li {
    padding: 0;
}

.nav-dropdown-menu a {
    display: block;
    padding: 0.35rem 1rem;
    font-size: 0.85rem;
    white-space: nowrap;
}

.nav-dropdown-menu a:hover {
    background: var(--color-body-bg, #f5f5f5);
}

/* --- Footer --- */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 2rem var(--gap);
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-secondary);
    background: var(--color-background);
}

.footer-inner {
    max-width: var(--wide-width);
    margin: 0 auto;
}

.footer-inner a {
    color: var(--color-secondary);
}

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

/* --- Visualization Placeholders --- */
.viz-placeholder {
    background: #f0f0f0;
    border: 2px dashed #ccc;
    padding: 3rem;
    text-align: center;
    color: var(--color-secondary);
    margin: 1.5rem 0;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
}

/* --- Team Member Cards --- */
.team-member {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.team-member:last-child {
    border-bottom: none;
}

.team-member-photo {
    flex-shrink: 0;
    width: 110px;
    height: 110px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
}

.team-member-body {
    flex: 1;
    min-width: 0;
}

.team-member h3 {
    margin-bottom: 0.25rem;
}

.team-member .role {
    color: var(--color-secondary);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

@media (max-width: 600px) {
    .team-member {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

/* --- About Page: compact sections --- */
.about-section {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.about-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.about-section h2 {
    margin-bottom: 0.75rem;
}

/* Team grid: compact cards */
.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem 1.5rem;
}

.team-card {
    text-align: center;
}

.team-card img {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
    margin-bottom: 0.4rem;
}

.team-card-name {
    font-weight: 700;
    font-size: 0.88rem;
    margin: 0;
    line-height: 1.3;
}

.team-card-role {
    font-size: 0.78rem;
    color: var(--color-secondary);
    margin: 0.1rem 0 0;
    line-height: 1.3;
}

/* Media count badge */
.about-media-count {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 0.85rem;
    color: var(--color-secondary);
}

/* See-all link */
.about-see-all {
    font-family: var(--font-heading);
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: 0.02em;
}

.about-see-all:hover {
    text-decoration: underline;
}

@media (max-width: 600px) {
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* --- Media Page --- */
.media-year-heading {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.6rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.media-year-count {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 0.95rem;
    color: var(--color-secondary);
}

/* Accordion for older years */
.media-year-accordion {
    border: 1px solid var(--color-border);
    border-radius: 4px;
    margin-top: 1.5rem;
    background: var(--color-background);
}

.media-year-accordion summary {
    cursor: pointer;
    padding: 0.85rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    user-select: none;
    transition: background 0.15s ease;
}

.media-year-accordion summary::-webkit-details-marker {
    display: none;
}

.media-year-accordion summary::before {
    content: "\25B6";
    font-size: 0.7rem;
    color: var(--color-secondary);
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.media-year-accordion[open] summary::before {
    transform: rotate(90deg);
}

.media-year-accordion summary:hover {
    background: var(--color-body-bg);
}

.media-year-accordion summary .media-year-heading {
    font-size: 1.38rem;
    margin: 0;
}

.media-year-accordion summary .media-year-count {
    font-size: 0.9rem;
}

.media-year-accordion > .media-month {
    padding: 0 1.25rem;
}

.media-year-accordion > .media-month:last-child {
    padding-bottom: 1rem;
}

/* Month sub-headings */
.media-month {
    margin-bottom: 0.5rem;
}

.media-month h3 {
    margin-top: 1rem;
    margin-bottom: 0.35rem;
    padding-bottom: 0.25rem;
    border-bottom: 2px solid var(--color-primary);
    display: inline-block;
    font-size: 1.05rem;
}

.media-list {
    margin-top: 0;
}

.media-item {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    line-height: 1.5;
}

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

.media-publication {
    font-weight: 700;
    color: var(--color-foreground);
    margin-right: 0.15rem;
}

.media-publication::after {
    content: " — ";
    font-weight: 400;
    color: var(--color-secondary);
}

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

.media-item a:hover {
    text-decoration: underline;
}

/* --- Partner Sections --- */
.partner-section {
    margin-bottom: 2rem;
}

.partner-section h2 {
    margin-bottom: 1rem;
}

.partner-list {
    list-style: disc;
    padding-left: 2rem;
}

.partner-list li {
    padding: 0.25rem 0;
}

/* --- Contact form: success & error states --- */
.success-box {
    background: #f0faf4;
    border: 1px solid #b0ddc0;
    padding: 1.5rem 1.75rem;
    margin-bottom: 1.5rem;
}

.success-box h2 {
    margin-top: 0;
    color: #1a6e38;
}

.success-box .btn {
    display: inline-block;
    margin-top: 0.5rem;
    text-decoration: none;
}

.form-errors {
    background: #fff5f7;
    border: 1px solid #f5a0b5;
    padding: 0.875rem 1.25rem;
    margin-bottom: 1.25rem;
    color: #c0003a;
    font-size: 0.95rem;
}

.form-errors p {
    margin: 0;
}

/* --- Forms --- */
.contact-form {
    margin-top: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.375rem;
    font-weight: 700;
    font-size: 1rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: 0.667em;
    border: 1px solid rgba(0, 0, 0, 0.15);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.5;
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group label input[type="checkbox"] {
    margin-right: 0.5rem;
}

.btn {
    background: #32373c;
    color: #fff;
    border: 0;
    padding: calc(0.667em + 2px) calc(1.333em + 2px);
    font-family: var(--font-body);
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.15s ease;
}

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

/* --- Utility --- */
.note {
    font-size: 0.9rem;
    color: var(--color-secondary);
    font-style: italic;
    margin-top: 1rem;
}

/* --- Charts --- */
.chart-figure {
    margin: 2.5rem 0;
    border: none;
    padding: 0;
}

.chart-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    line-height: 1.35;
    margin-bottom: 0.75rem;
    color: var(--color-foreground);
}

.chart-container {
    width: 100%;
    min-height: 420px;
    background: #fff;
    border: 1px solid #e0e0e0;
    position: relative;
    overflow: hidden;
}

.chart-note {
    font-size: 0.875rem;
    color: var(--color-secondary);
    margin-top: 0.5rem;
    line-height: 1.6;
}

.chart-link {
    color: var(--color-primary);
    font-weight: 700;
}

/* Industry toggle buttons */
.chart-controls {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.chart-toggle {
    padding: 0.3rem 0.85rem;
    border: 1px solid var(--color-border);
    background: #fff;
    font-family: var(--font-body);
    font-size: 0.875rem;
    cursor: pointer;
    color: var(--color-secondary);
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.chart-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.chart-toggle.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* Map time slider */
.map-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.6rem;
    font-size: 0.9rem;
    color: var(--color-secondary);
}

.map-slider-label {
    white-space: nowrap;
    min-width: 130px;
}

.map-slider {
    flex: 1;
    max-width: 480px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

/* D3 chart internals */
.chart-container svg {
    display: block;
}

.chart-container .grid line {
    stroke: #e8e8e8;
    stroke-dasharray: none;
}

.chart-container .grid path,
.chart-container .grid .domain {
    display: none;
}

.chart-container .axis path,
.chart-container .axis .domain {
    stroke: #ccc;
}

.chart-container .axis text {
    font-family: var(--font-body);
    font-size: 12px;
    fill: #555;
}

.chart-tooltip {
    position: absolute;
    pointer-events: none;
    background: #fff;
    border: 1px solid #ddd;
    padding: 0.5rem 0.75rem;
    font-family: var(--font-body);
    font-size: 0.8rem;
    line-height: 1.6;
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
    max-width: 220px;
    z-index: 10;
}

.chart-tooltip .tt-date {
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: #333;
}

.chart-tooltip .tt-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.chart-tooltip .tt-swatch {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* Chart legends */
.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    margin-top: 0.75rem;
    padding: 0 4px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 700;
    cursor: pointer;
    user-select: none;
    transition: opacity 0.2s;
}

.legend-item.dimmed {
    opacity: 0.3;
}

.legend-swatch {
    width: 22px;
    height: 3px;
    border-radius: 2px;
    flex-shrink: 0;
}

/* Watermark */
.chart-watermark {
    font-family: var(--font-body);
    font-size: 11px;
    fill: #bbb;
    text-anchor: end;
}

/* --- Data download tiers --- */
.data-cite {
    font-size: 0.95rem;
    color: var(--color-secondary);
    border-left: 3px solid var(--color-border);
    padding-left: 1rem;
    margin-top: 0.25rem;
}

.data-tier {
    border: 1px solid var(--color-border);
    padding: 1.75rem 2rem;
    margin: 1.5rem 0;
}

.data-tier--a {
    border-left: 4px solid var(--color-primary);
}

.data-tier--b {
    background: var(--color-body-bg);
}

.data-tier-label {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-secondary);
    display: block;
    margin-bottom: 0.375rem;
}

.data-tier--a .data-tier-label {
    color: var(--color-primary);
}

.data-tier h2 {
    margin-top: 0;
}

.data-btn {
    display: inline-block;
    margin-top: 1.25rem;
    text-decoration: none;
}

/* --- Responsive --- */
@media (max-width: 600px) {
    h1 { font-size: 2rem; }
    .site-nav ul { gap: 0.75rem; }
    .viz-placeholder { min-height: 200px; padding: 2rem 1rem; }
    .chart-container { min-height: 280px; }
    .map-controls { flex-direction: column; align-items: flex-start; }
    .data-tier { padding: 1.25rem; }
}