/* ==========================================================================
   Outreach — The Geography of Wellbeing
   Premium editorial design system
   ========================================================================== */

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

:root {
  /* Warm palette */
  --bg:            #FAF7F3;
  --surface:       #FFFFFF;
  --surface-alt:   #F5F0EB;

  /* Terracotta system */
  --terracotta:       #B5725A;
  --terracotta-light: rgba(181, 114, 90, 0.08);
  --terracotta-hover: #C4805A;
  --brown-header:     #7D5A48;
  --brown-deep:       #6B4A3A;
  --rust:             #C4805A;

  /* Text */
  --text-primary:  #3D3530;
  --text-body:     #5A504A;
  --text-muted:    #9A8E85;

  /* UI */
  --border:        #E5DDD5;
  --border-light:  #EDE7E0;
  --radius:        10px;
  --radius-sm:     6px;
  --radius-lg:     16px;
  --shadow:        0 2px 12px rgba(61, 53, 48, 0.06);
  --shadow-lg:     0 8px 32px rgba(61, 53, 48, 0.1);
  --shadow-hover:  0 4px 20px rgba(61, 53, 48, 0.12);

  /* Choropleth */
  --tier-critical: #6B4A3A;
  --tier-high:     #B5725A;
  --tier-moderate: #D4A574;
  --tier-low:      #E5D5C5;

  /* Typography */
  --font-brand:    'Fraunces', Georgia, serif;
  --font-heading:  'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-sans:     'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Transitions */
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1);
  --duration:      0.3s;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-body);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Typography Scale ===== */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.2;
}

/* ===== Header ===== */
#header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 1000;
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
  padding-left: 20px;
  border-left: 1px solid var(--border);
}

.header-nav-link {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  white-space: nowrap;
}

.header-nav-link:hover {
  color: var(--terracotta);
  background: var(--terracotta-light);
}

.header-nav-link.active {
  color: var(--terracotta);
  background: var(--terracotta-light);
  font-weight: 600;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

#header h1 {
  font-family: var(--font-brand);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--brown-deep);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.subtitle {
  font-family: var(--font-brand);
  font-size: 0.78rem;
  color: var(--text-muted);
  font-style: italic;
  font-weight: 400;
  margin-top: 1px;
  letter-spacing: 0.02em;
}

.header-right {
  display: flex;
  align-items: center;
}

.header-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  font-weight: 500;
}

/* ===== App Layout ===== */
#app {
  flex: 1;
  position: relative;
  display: flex;
  overflow: hidden;
}

/* ===== Left Editorial Panel ===== */
#left-panel {
  width: 300px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 24px 20px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 0;
}

#left-panel::-webkit-scrollbar {
  width: 4px;
}

#left-panel::-webkit-scrollbar-track {
  background: transparent;
}

#left-panel::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

/* Editorial intro */
.editorial-intro {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.editorial-lead {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text-primary);
  margin-bottom: 12px;
  font-weight: 400;
}

.drop-cap {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--terracotta);
  float: left;
  line-height: 0.82;
  margin-right: 5px;
  margin-top: 4px;
}

.editorial-body {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text-body);
}

/* Panel sections */
.panel-section {
  padding: 16px 0;
  border-bottom: 1px solid var(--border-light);
}

.panel-section:last-child {
  border-bottom: none;
}

.panel-section-label {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

/* Briefing download button */
.btn-briefing {
  display: block;
  margin-top: 10px;
  padding: 8px 14px;
  border: 1.5px solid var(--terracotta);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--terracotta);
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  background: transparent;
}

.btn-briefing:hover {
  background: var(--terracotta);
  color: white;
}

/* Borough select */
#borough-select {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-family: var(--font-sans);
  color: var(--text-body);
  background: var(--surface);
  cursor: pointer;
  transition: border-color var(--duration);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 5l3 3 3-3' fill='none' stroke='%239A8E85' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}

#borough-select:focus {
  outline: none;
  border-color: var(--terracotta);
  box-shadow: 0 0 0 3px var(--terracotta-light);
}

/* Radio card layer selector */
.radio-card-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 360px;
  overflow-y: auto;
}

.radio-card-group::-webkit-scrollbar {
  width: 3px;
}

.radio-card-group::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.radio-card {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
  background: transparent;
  position: relative;
}

.radio-card input {
  display: none;
}

.radio-card:hover {
  background: var(--surface-alt);
}

.radio-card.selected {
  background: var(--terracotta-light);
  border-left-color: var(--terracotta);
}

.radio-card-inner {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.radio-card-title {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.3;
}

.radio-card.selected .radio-card-title {
  color: var(--brown-deep);
  font-weight: 600;
}

.radio-card-desc {
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.3;
}

/* Need level filter chips */
#tier-filters {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.tier-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  background: var(--surface);
  border: 1px solid var(--border);
  transition: all 0.2s ease;
  color: var(--text-body);
}

.tier-chip input { display: none; }

.tier-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.tier-chip.critical .tier-dot { background: var(--tier-critical); }
.tier-chip.high .tier-dot     { background: var(--tier-high); }
.tier-chip.moderate .tier-dot { background: var(--tier-moderate); }
.tier-chip.low .tier-dot      { background: var(--tier-low); }

.tier-chip:has(input:checked) {
  border-color: var(--terracotta);
  background: var(--terracotta-light);
}

.tier-chip:has(input:not(:checked)) {
  opacity: 0.4;
}

.tier-chip:hover {
  border-color: var(--terracotta-hover);
}

/* ===== Map Container ===== */
#map-container {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;
}

#map {
  flex: 1;
  z-index: 1;
}

/* ===== Legend ===== */
#legend {
  position: absolute;
  bottom: 28px;
  left: 16px;
  z-index: 800;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 18px;
  min-width: 170px;
  border: 1px solid var(--border-light);
}

#legend h4 {
  font-family: var(--font-sans);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 10px;
  font-weight: 600;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 5px;
  font-size: 0.78rem;
  color: var(--text-body);
}

.legend-swatch {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  flex-shrink: 0;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

/* ===== Sidebar ===== */
#sidebar {
  position: absolute;
  top: 0;
  right: 0;
  width: 400px;
  height: 100%;
  background: var(--surface);
  box-shadow: -4px 0 24px rgba(61, 53, 48, 0.1);
  z-index: 900;
  transform: translateX(100%);
  transition: transform var(--duration) var(--ease-out);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

#sidebar.sidebar-open { transform: translateX(0); }

#sidebar::-webkit-scrollbar {
  width: 5px;
}

#sidebar::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

#sidebar-close {
  position: absolute;
  top: 14px;
  right: 14px;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--surface);
  line-height: 1;
  z-index: 10;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background 0.2s;
}

#sidebar-close:hover {
  background: rgba(255, 255, 255, 0.15);
}

#sidebar-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.sidebar-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 40px;
  gap: 16px;
}

.placeholder-icon {
  opacity: 0.5;
}

/* Sidebar header strip */
.sidebar-header-strip {
  background: var(--brown-header);
  padding: 24px 24px 20px;
  color: var(--surface);
  position: relative;
}

.sidebar-header-strip h2 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--surface);
  margin-bottom: 2px;
  padding-right: 32px;
}

.sidebar-location {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 4px;
}

.sidebar-location svg {
  flex-shrink: 0;
  opacity: 0.7;
}

.sidebar-badges {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-location {
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.9);
}

.badge-tier {
  color: var(--surface);
}

.badge-tier.tier-critical { background: rgba(107, 74, 58, 0.9); }
.badge-tier.tier-high     { background: rgba(181, 114, 90, 0.9); }
.badge-tier.tier-moderate { background: rgba(212, 165, 116, 0.85); color: var(--text-primary); }
.badge-tier.tier-low      { background: rgba(229, 213, 197, 0.9); color: var(--text-body); }

/* KPI Row */
.kpi-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-light);
}

.kpi-card {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.kpi-value {
  font-family: var(--font-heading);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--terracotta);
  line-height: 1.1;
}

.kpi-label {
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.kpi-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Editorial paragraph in sidebar */
.sidebar-editorial {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-light);
}

.sidebar-editorial p {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-body);
}

.sidebar-editorial .drop-cap-sm {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--terracotta);
  float: left;
  line-height: 0.82;
  margin-right: 5px;
  margin-top: 3px;
}

/* Sidebar sections */
.sidebar-section {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-light);
}

.sidebar-section:last-child {
  border-bottom: none;
}

.section-title {
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 14px;
}

/* Indicator bars */
.indicator-bar-group {
  margin-bottom: 12px;
}

.indicator-bar-group:last-child {
  margin-bottom: 0;
}

.indicator-bar-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.78rem;
  margin-bottom: 5px;
  color: var(--text-body);
}

.indicator-bar-label .name {
  font-weight: 400;
}

.indicator-bar-label .value {
  font-weight: 600;
  color: var(--terracotta);
  font-size: 0.76rem;
}

.indicator-bar-track {
  height: 5px;
  background: var(--surface-alt);
  border-radius: 3px;
  overflow: hidden;
}

.indicator-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--terracotta), var(--rust));
  transition: width 0.5s var(--ease-out);
}

/* Context stats table */
.stats-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}

.stats-table tr {
  border-bottom: 1px solid var(--border-light);
}

.stats-table tr:last-child {
  border-bottom: none;
}

.stats-table td {
  padding: 8px 0;
  color: var(--text-body);
}

.stats-table td:first-child {
  color: var(--text-muted);
  font-size: 0.76rem;
}

.stats-table td:last-child {
  text-align: right;
  font-weight: 500;
  color: var(--text-primary);
}

/* Borough comparison footer */
.sidebar-comparison {
  padding: 18px 24px;
  background: var(--surface-alt);
  border-top: 1px solid var(--border);
}

.comparison-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  margin-bottom: 6px;
}

.comparison-row:last-child {
  margin-bottom: 0;
}

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

.comparison-value {
  font-weight: 600;
  color: var(--text-primary);
}

.comparison-diff {
  font-size: 0.7rem;
  font-weight: 500;
  margin-left: 4px;
}

.comparison-diff.above { color: var(--tier-critical); }
.comparison-diff.below { color: var(--terracotta); }

/* ===== Leaflet Tooltip Override ===== */
.lsoa-tooltip-wrapper {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  padding: 0 !important;
}

.lsoa-tooltip-wrapper::before {
  display: none !important;
}

.lsoa-tooltip {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  box-shadow: var(--shadow);
  line-height: 1.4;
}

.lsoa-tooltip .tt-name {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3px;
  font-size: 0.82rem;
}

.lsoa-tooltip .tt-score {
  color: var(--terracotta);
  font-weight: 500;
}

/* ===== Loading Overlay ===== */
#loading {
  position: absolute;
  inset: 0;
  z-index: 2000;
  background: rgba(250, 247, 243, 0.92);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

#loading span {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 400;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--terracotta);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  #left-panel {
    width: 260px;
    padding: 18px 16px;
  }
}

@media (max-width: 768px) {
  #header {
    padding: 10px 16px;
  }

  .header-meta {
    display: none;
  }

  #left-panel {
    display: none;
  }

  #sidebar {
    width: 100%;
  }

  .editorial-lead {
    font-size: 0.88rem;
  }
}