/* ==========================================================================
   Cât înseamnă în lei noi? — Translator de lei vechi
   mariuscomper.uk/lei-vechi-lei-noi/
   ========================================================================== */

:root {
  /* Light Theme — Warm Paper & Polymer Banknote Tints */
  --bg-canvas: #f8f6f0;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #fbf9f4;
  --bg-subtle: #f0ebe1;
  --bg-highlight: #ebe3d3;
  --text-primary: #12141a;
  --text-secondary: #242a36;
  --text-muted: #384050;
  --border-subtle: #ded8cb;
  --border-strong: #b8b09f;
  --accent-ink: #1b385a;
  --accent-violet: #553c9a;
  --accent-green: #1c5b36;
  --accent-amber: #8c5311;
  --card-shadow: 0 4px 20px rgba(40, 30, 15, 0.05);
  --focus-ring: 0 0 0 3px rgba(27, 56, 90, 0.35);

  --font-serif: "Iowan Old Style", "Apple Garamond", "Baskerville", "Times New Roman", "Georgia", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Source Code Pro", Menlo, Monaco, Consolas, monospace;

  --topbar-height: 46px;
  --container-max: 980px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
}

[data-theme="dark"] {
  /* Dark Theme — Deep Archival Slate & Luminous Inks */
  --bg-canvas: #101216;
  --bg-surface: #181b22;
  --bg-surface-elevated: #1f232c;
  --bg-subtle: #252a35;
  --bg-highlight: #2f3644;
  --text-primary: #f6f8fc;
  --text-secondary: #d4dae8;
  --text-muted: #b8c0d2;
  --border-subtle: #2d3340;
  --border-strong: #444d60;
  --accent-ink: #7cb2e8;
  --accent-violet: #b794f4;
  --accent-green: #68d391;
  --accent-amber: #ecc94b;
  --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  --focus-ring: 0 0 0 3px rgba(124, 178, 232, 0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-canvas: #101216;
    --bg-surface: #181b22;
    --bg-surface-elevated: #1f232c;
    --bg-subtle: #252a35;
    --bg-highlight: #2f3644;
    --text-primary: #f6f8fc;
    --text-secondary: #d4dae8;
    --text-muted: #b8c0d2;
    --border-subtle: #2d3340;
    --border-strong: #444d60;
    --accent-ink: #7cb2e8;
    --accent-violet: #b794f4;
    --accent-green: #68d391;
    --accent-amber: #ecc94b;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
    --focus-ring: 0 0 0 3px rgba(124, 178, 232, 0.45);
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   Topbar (V2 Standard Pattern)
   ========================================================================== */

.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  height: var(--topbar-height);
  padding: 0 16px;
  background-color: var(--bg-canvas);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  gap: 12px;
}

.topbar .home {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.88rem;
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.topbar .home:hover {
  color: var(--accent-ink);
}

.topnav {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.topnav::-webkit-scrollbar {
  display: none;
}

.topnav a {
  padding: 4px 8px;
  color: var(--text-secondary);
  font-size: 0.82rem;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background-color 0.15s ease;
}

.topnav a:hover,
.topnav a:focus-visible {
  color: var(--text-primary);
  background-color: var(--bg-subtle);
}

.topbar .spacer {
  flex: 1;
}

.topbar .chip {
  padding: 3px 8px;
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-decoration: none;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  transition: all 0.15s ease;
}

.topbar .chip:hover,
.topbar .chip:focus-visible {
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 50%;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.icon-btn:hover {
  border-color: var(--border-strong);
}

.icon-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.icon-btn svg {
  display: block;
}

.icon-btn svg[hidden] {
  display: none !important;
}

/* ==========================================================================
   Page Layout & Sections
   ========================================================================== */

main {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 32px 20px 80px 20px;
}

section {
  scroll-margin-top: calc(var(--topbar-height) + 16px);
  margin-bottom: 56px;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3 {
  font-family: var(--font-serif);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
}

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-ink);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

h1 {
  font-size: clamp(1.85rem, 4vw, 2.7rem);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

h2 {
  font-size: clamp(1.4rem, 2.8vw, 1.95rem);
  letter-spacing: -0.015em;
  margin-bottom: 14px;
}

h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.deck {
  font-size: clamp(1.05rem, 2vw, 1.22rem);
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 28px;
}

.reading-prose {
  max-width: 680px;
  font-size: 1.06rem;
  color: var(--text-primary);
}

.reading-prose p {
  margin-bottom: 18px;
}

/* ==========================================================================
   Hero Interactive Converter
   ========================================================================== */

.converter-container {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--card-shadow);
  margin-bottom: 24px;
}

.converter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
}

.converter-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.mode-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.mode-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background-color: var(--bg-highlight);
}

.input-wrapper {
  position: relative;
  margin-bottom: 20px;
}

.converter-input {
  width: 100%;
  padding: 16px 20px;
  font-size: clamp(1.35rem, 3.2vw, 1.85rem);
  font-weight: 600;
  color: var(--text-primary);
  background-color: var(--bg-canvas);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.converter-input:focus {
  border-color: var(--accent-ink);
  box-shadow: var(--focus-ring);
}

.converter-input::placeholder {
  color: var(--text-muted);
  opacity: 1;
}

/* Quick Chips */
.chips-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.chips-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-right: 4px;
}

.chip-btn {
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 5px 12px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.chip-btn:hover,
.chip-btn:focus-visible {
  color: var(--text-primary);
  border-color: var(--accent-ink);
  background-color: var(--bg-subtle);
}

/* Live Result Display */
.result-card {
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.result-main {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.result-tag {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.result-amount {
  font-size: clamp(2rem, 5.5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.result-colloquial {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent-ink);
}

.result-formula {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-muted);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  width: fit-content;
}

.result-assumption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--border-subtle);
  font-size: 0.84rem;
  color: var(--text-muted);
}

.re-interpret-btn {
  background: none;
  border: none;
  color: var(--accent-ink);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.re-interpret-btn:hover {
  color: var(--text-primary);
}

/* Four-zero drop animation element */
.zero-drop-cut {
  display: inline-block;
  text-decoration: line-through;
  opacity: 0.45;
  color: var(--accent-amber);
}

/* ==========================================================================
   Archival Banknote Comparison (Același Caragiale)
   ========================================================================== */

.banknotes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 24px 0 20px 0;
}

@media (max-width: 680px) {
  .banknotes-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

.banknote-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
}

.banknote-media {
  position: relative;
  background-color: var(--bg-subtle);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  border-bottom: 1px solid var(--border-subtle);
}

.banknote-img {
  width: 100%;
  height: auto;
  max-height: 220px;
  object-fit: contain;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.12));
  border-radius: 4px;
}

.banknote-body {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.banknote-badge {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-ink);
  margin-bottom: 4px;
}

.banknote-value {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.banknote-caption {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 14px;
}

.banknote-meta {
  margin-top: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 10px;
}

/* ==========================================================================
   Cultural Cards (Două limbi pentru aceiași bani)
   ========================================================================== */

.cultural-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 24px 0 16px 0;
}

.cultural-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
}

.cultural-card:hover,
.cultural-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--accent-ink);
  box-shadow: var(--card-shadow);
  outline: none;
}

.card-vernacular {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card-old {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.card-arrow {
  color: var(--text-muted);
  font-size: 1rem;
}

.card-new {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--accent-ink);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

/* ==========================================================================
   Callout / Inflation vs Denomination Box
   ========================================================================== */

.callout-box {
  background-color: var(--bg-surface);
  border-left: 4px solid var(--accent-amber);
  border-top: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 28px 0;
}

.callout-box h3 {
  color: var(--text-primary);
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.callout-box p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.55;
  margin-bottom: 10px;
}

.callout-box p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Static Conversion Table
   ========================================================================== */

.table-wrapper {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow-x: auto;
  box-shadow: var(--card-shadow);
  margin: 20px 0;
}

table.conversion-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

table.conversion-table th {
  background-color: var(--bg-subtle);
  color: var(--text-primary);
  font-weight: 600;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

table.conversion-table td {
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

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

table.conversion-table tr:hover td {
  background-color: var(--bg-subtle);
  color: var(--text-primary);
  cursor: pointer;
}

.table-action-btn {
  background: none;
  border: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  width: 100%;
  padding: 0;
  display: block;
}

.table-action-btn:focus-visible {
  outline: 2px solid var(--accent-ink);
  outline-offset: 4px;
  border-radius: 2px;
}

table.conversion-table .num-old {
  font-weight: 500;
}

table.conversion-table .num-new {
  font-weight: 700;
  color: var(--accent-ink);
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   FAQ Details / Summary
   ========================================================================== */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 20px 0;
}

.faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  transition: border-color 0.15s ease;
}

.faq-item[open] {
  border-color: var(--border-strong);
}

.faq-item summary {
  font-family: var(--font-serif);
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--text-muted);
  font-weight: 400;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-answer {
  margin-top: 12px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.55;
}

/* ==========================================================================
   Sources & Context
   ========================================================================== */

.sources-section {
  border-top: 1px solid var(--border-subtle);
  padding-top: 40px;
  margin-top: 60px;
}

.sources-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 18px 0;
}

.sources-list li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.sources-list a {
  color: var(--accent-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.sources-list a:hover {
  color: var(--text-primary);
}

/* ==========================================================================
   Footer
   ========================================================================== */

footer.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 32px 16px 48px 16px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

footer.site-footer a {
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 1px solid var(--border-subtle);
}

footer.site-footer a:hover {
  color: var(--text-primary);
  border-color: var(--text-primary);
}

footer.site-footer .footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Accessibility & Reduced Motion
   ========================================================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--accent-ink);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 404 Error Page */
.error-page-main {
  padding-top: 60px;
  text-align: center;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.error-page-main .eyebrow {
  display: inline-block;
  margin-bottom: 12px;
}

.error-page-action {
  margin-top: 28px;
}

.error-return-link {
  display: inline-block;
  padding: 10px 24px;
  text-decoration: none;
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-weight: 600;
  transition: all 0.15s ease;
}

.error-return-link:hover,
.error-return-link:focus-visible {
  border-color: var(--accent-ink);
  color: var(--accent-ink);
  background-color: var(--bg-subtle);
}