/* ═══════════════════════════════════════════════════════════
   SSI Index Dashboard — Design System
   Ikenga Palette · DM Sans + Playfair Display
   v4.0 — Session 5 Polish
   ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700&family=Playfair+Display:wght@400;600;700&display=swap');

/* ── Tokens ── */
:root {
  --cream: #faf6f5;
  --cream-deep: #f0ebe8;
  --crimson: #941914;
  --terracotta: #aa4234;
  --sage: #5d8563;
  --bronze: #b8863a;
  --ink: #2c2420;
  --warm-grey: #8a7e76;
  --warm-grey-light: #b5aca5;
  --bg: #f5f0ed;
  --card-bg: #ffffff;
  --card-border: rgba(44,36,32,0.08);
  --card-shadow: 0 1px 4px rgba(44,36,32,0.06);
  --card-shadow-hover: 0 4px 16px rgba(44,36,32,0.10);
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 14px;
  --focus-ring: 0 0 0 2px rgba(170,66,52,0.30);

  /* SSI Bands */
  --band-low: #5d8563;
  --band-low-bg: rgba(93,133,99,0.10);
  --band-medium: #b8863a;
  --band-medium-bg: rgba(184,134,58,0.10);
  --band-high: #aa4234;
  --band-high-bg: rgba(170,66,52,0.10);
  --band-critical: #941914;
  --band-critical-bg: rgba(148,25,20,0.10);
}

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── Accessibility: Focus ── */
:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}
a:focus-visible { border-radius: var(--radius-sm); }

/* Skip to main content (screen reader) */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 200;
  background: var(--terracotta);
  color: white;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 8px;
}

/* ── Typography ── */
h1, h2, h3 { font-family: 'Playfair Display', Georgia, serif; font-weight: 600; }
h1 { font-size: 28px; line-height: 1.2; }
h2 { font-size: 22px; line-height: 1.3; margin-top: 28px; margin-bottom: 16px; }
h3 { font-size: 17px; line-height: 1.4; margin-top: 24px; margin-bottom: 12px; }
p  { margin-bottom: 14px; }

.label-xs {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--warm-grey);
  font-weight: 500;
}
.label-sm {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--warm-grey);
  font-weight: 500;
}

/* ── Navigation ── */
.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245,240,237,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
  padding: 0 32px;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.topnav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  flex-shrink: 0;
}
.topnav-brand svg {
  flex-shrink: 0;
}
.topnav-brand h1 {
  font-size: 17px;
  font-weight: 600;
}
.topnav-brand h1 span {
  color: var(--terracotta);
}
.topnav-version {
  font-size: 10px;
  font-weight: 500;
  color: var(--warm-grey);
  background: var(--cream-deep);
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.04em;
}

/* Country badge in nav */
.nav-country-badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  background: var(--cream-deep);
  padding: 4px 10px;
  border-radius: 20px;
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.nav-back {
  font-size: 12px;
  font-weight: 500;
  color: var(--warm-grey);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s;
}
.nav-back:hover {
  color: var(--terracotta);
}

.topnav-links {
  display: flex;
  gap: 2px;
  margin-left: auto;
}
.topnav-links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--warm-grey);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: all 0.15s;
  white-space: nowrap;
}
.topnav-links a:hover {
  color: var(--ink);
  background: rgba(44,36,32,0.04);
}
.topnav-links a.active {
  color: var(--terracotta);
  background: rgba(170,66,52,0.08);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  margin: 4px 0;
  transition: 0.2s;
}

/* ── Responsive: Tablet ── */
@media (max-width: 1024px) {
  .topnav { padding: 0 20px; gap: 16px; }
  .topnav-links a { padding: 8px 10px; font-size: 12px; }
}

/* ── Responsive: Mobile ── */
@media (max-width: 768px) {
  .topnav { padding: 0 16px; gap: 12px; }
  .nav-toggle { display: block; }
  .topnav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--cream);
    flex-direction: column;
    padding: 8px 16px;
    border-bottom: 1px solid var(--card-border);
    box-shadow: var(--card-shadow-hover);
    z-index: 99;
  }
  .topnav-links.open { display: flex; }
  .topnav-links a { padding: 12px 16px; font-size: 14px; }
}

/* ── Page Shell ── */
.page-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 32px 64px;
}
@media (max-width: 768px) {
  .page-shell { padding: 20px 16px 48px; }
}

.page-header {
  margin-bottom: 32px;
}
.page-header h1 {
  margin-bottom: 6px;
}
.page-header p {
  color: var(--warm-grey);
  font-size: 14px;
  max-width: 600px;
}

/* ── Cards ── */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--card-shadow);
  transition: box-shadow 0.2s;
}
.card:hover {
  box-shadow: var(--card-shadow-hover);
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
}
.card-header h3 {
  font-size: 14px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
}

@media (max-width: 480px) {
  .card { padding: 16px; }
  .card-header { flex-wrap: wrap; }
}

/* ── KPI Cards ── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.kpi-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--card-shadow);
}
.kpi-card .kpi-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--warm-grey);
  font-weight: 500;
  margin-bottom: 6px;
}
.kpi-card .kpi-value {
  font-family: 'Playfair Display', serif;
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 4px;
}
.kpi-card .kpi-sub {
  font-size: 12px;
  color: var(--warm-grey);
}
@media (max-width: 480px) {
  .kpi-card .kpi-value { font-size: 26px; }
  .kpi-card { padding: 14px 16px; }
}

/* ── Band Badges ── */
.band-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  white-space: nowrap;
}
.band-badge.low { background: var(--band-low-bg); color: var(--band-low); }
.band-badge.medium { background: var(--band-medium-bg); color: var(--band-medium); }
.band-badge.high { background: var(--band-high-bg); color: var(--band-high); }
.band-badge.critical { background: var(--band-critical-bg); color: var(--band-critical); }

.band-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}
.band-dot.low { background: var(--band-low); }
.band-dot.medium { background: var(--band-medium); }
.band-dot.high { background: var(--band-high); }
.band-dot.critical { background: var(--band-critical); }

/* ── Grid Layouts ── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}
@media (max-width: 900px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* ── Distribution Bar ── */
.dist-bar {
  display: flex;
  height: 10px;
  border-radius: 5px;
  overflow: hidden;
  margin: 12px 0 8px;
}
.dist-bar div {
  transition: width 0.4s ease;
}
.dist-legend {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.dist-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--ink);
}
.dist-legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ── Tables ── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.data-table th {
  text-align: left;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--warm-grey);
  font-weight: 500;
  padding: 10px 12px;
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  background: var(--card-bg);
}
.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(44,36,32,0.04);
  vertical-align: middle;
}
.data-table tr:hover td {
  background: rgba(44,36,32,0.02);
}
.data-table .num {
  font-variant-numeric: tabular-nums;
  text-align: right;
}

/* Responsive tables */
@media (max-width: 600px) {
  .data-table { font-size: 12px; }
  .data-table th, .data-table td { padding: 8px 6px; }
  .data-table .hide-mobile { display: none; }
}

/* ── Mini Score Bar ── */
.score-bar-wrap {
  width: 80px;
  height: 6px;
  background: var(--cream-deep);
  border-radius: 3px;
  overflow: hidden;
  display: inline-block;
  vertical-align: middle;
}
.score-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s;
}

/* ── Filter Bar ── */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.filter-bar label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--warm-grey);
  font-weight: 500;
}
.filter-bar select,
.filter-bar input {
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  padding: 6px 10px;
  border: 1px solid rgba(44,36,32,0.12);
  border-radius: var(--radius-sm);
  background: var(--cream);
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.filter-bar select:focus,
.filter-bar input:focus {
  border-color: var(--terracotta);
  box-shadow: var(--focus-ring);
}
@media (max-width: 600px) {
  .filter-bar { gap: 8px; padding: 10px 12px; }
  .filter-bar select, .filter-bar input { font-size: 12px; padding: 6px 8px; }
}

/* ── Tabs ── */
.tabs {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 20px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.tab-btn {
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: var(--warm-grey);
  background: none;
  border: none;
  padding: 10px 16px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  white-space: nowrap;
  flex-shrink: 0;
}
.tab-btn:hover {
  color: var(--ink);
}
.tab-btn.active {
  color: var(--terracotta);
  border-bottom-color: var(--terracotta);
}
.tab-btn:focus-visible {
  box-shadow: var(--focus-ring);
}

/* ── Methodology Blocks ── */
.method-step {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}
.method-step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--terracotta);
  color: white;
  font-family: 'Playfair Display', serif;
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.method-step-content h3 {
  font-size: 15px;
  margin-bottom: 4px;
}
.method-step-content p {
  font-size: 13px;
  color: var(--warm-grey);
  line-height: 1.6;
}

.formula-block {
  background: rgb(98, 107, 125);
  color: #e8ddd6;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 13px;
  line-height: 1.8;
  padding: 20px 24px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 16px 0;
  -webkit-overflow-scrolling: touch;
}
.formula-block .hl-var { color: #ffb020; }
.formula-block .hl-fn { color: #2dd4a0; }
.formula-block .hl-num { color: #3b9eff; }
.formula-block .hl-comment { color: #8a7e76; font-style: italic; }

@media (max-width: 600px) {
  .formula-block { font-size: 11px; padding: 14px 16px; }
}

/* ── Source List ── */
.source-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}
.source-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s;
}
.source-card:hover {
  border-color: rgba(44,36,32,0.16);
}
.source-card .source-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.source-card .source-meta {
  min-width: 0;
}
.source-card .source-name {
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.source-card .source-detail {
  font-size: 11px;
  color: var(--warm-grey);
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--card-border);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--warm-grey);
  gap: 16px;
  flex-wrap: wrap;
}
.site-footer a {
  color: var(--terracotta);
  text-decoration: none;
}
.site-footer a:hover {
  text-decoration: underline;
}
.site-footer .copyright-notice {
  width: 100%;
  padding-top: 14px;
  margin-top: 2px;
  border-top: 1px solid var(--card-border);
  font-size: 10px;
  line-height: 1.6;
  color: var(--warm-grey-light);
}
@media (max-width: 600px) {
  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 16px;
  }
}

/* ── Loading Spinner ── */
.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--cream-deep);
  border-top-color: var(--terracotta);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-state {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 32px;
  color: var(--warm-grey);
  font-size: 13px;
}

/* ── Animations ── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in {
  animation: fadeIn 0.4s ease both;
}
.delay-1 { animation-delay: 0.05s; }
.delay-2 { animation-delay: 0.10s; }
.delay-3 { animation-delay: 0.15s; }
.delay-4 { animation-delay: 0.20s; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .animate-in { animation: none; }
  .dist-bar div { transition: none; }
  .loading-spinner { animation-duration: 2s; }
}

/* ── Print ── */
@media print {
  .topnav, .nav-toggle, .site-footer, .filter-bar { display: none !important; }
  .page-shell { padding: 0; max-width: 100%; }
  .card { box-shadow: none; border: 1px solid #ddd; break-inside: avoid; }
  .animate-in { animation: none; opacity: 1; }
  body { background: white; font-size: 12px; }
}

/* ── Noscript ── */
.noscript-banner {
  background: var(--crimson);
  color: white;
  text-align: center;
  padding: 16px;
  font-size: 14px;
  font-weight: 500;
}

/* ── Registration Gate ── */
.registration-overlay {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(44, 36, 32, 0.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: regFadeIn 0.4s ease both;
}
@keyframes regFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.registration-modal {
  background: var(--cream);
  border-radius: 16px;
  box-shadow: 0 24px 80px rgba(44, 36, 32, 0.25);
  max-width: 480px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 40px 36px 32px;
  animation: regSlideUp 0.45s ease both;
}
@keyframes regSlideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.registration-modal h2 {
  font-family: 'Playfair Display', serif;
  font-size: 22px;
  color: var(--ink);
  margin: 0 0 6px;
}
.registration-modal .reg-subtitle {
  font-size: 13px;
  line-height: 1.6;
  color: var(--warm-grey);
  margin: 0 0 24px;
}
.registration-modal label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--warm-grey);
  margin-bottom: 5px;
}
.registration-modal input,
.registration-modal select {
  display: block;
  width: 100%;
  padding: 10px 12px;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  color: var(--ink);
  background: white;
  border: 1px solid rgba(44, 36, 32, 0.15);
  border-radius: 8px;
  margin-bottom: 16px;
  box-sizing: border-box;
  transition: border-color 0.2s;
}
.registration-modal input:focus,
.registration-modal select:focus {
  outline: none;
  border-color: var(--crimson);
  box-shadow: 0 0 0 3px rgba(148, 25, 20, 0.1);
}
.registration-modal button[type="submit"] {
  display: block;
  width: 100%;
  padding: 12px;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: white;
  background: var(--crimson);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 8px;
  transition: background 0.2s, transform 0.1s;
}
.registration-modal button[type="submit"]:hover {
  background: #7a1410;
}
.registration-modal button[type="submit"]:active {
  transform: scale(0.98);
}
.registration-modal .reg-footer {
  font-size: 10px;
  color: var(--warm-grey-light);
  text-align: center;
  margin-top: 16px;
}
@media (max-width: 600px) {
  .registration-modal {
    padding: 28px 20px 24px;
    border-radius: 12px;
  }
  .registration-modal h2 { font-size: 19px; }
}