/* ==========================================================================
   Calculs du quotidien – Styles principaux
   Design : moderne, accessible, performant (pas de framework CSS)
   ========================================================================== */

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

/* --- Custom Properties --- */
:root {
  /* Couleurs */
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-border: #e2e8f0;
  --color-success: #059669;
  --color-success-bg: #ecfdf5;
  --color-error: #dc2626;
  --color-error-bg: #fef2f2;
  --color-highlight: #fef3c7;

  /* Espacements */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Typographie */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", monospace;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* Rayons */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Ombres */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);

  /* Transitions */
  --transition: 150ms ease;
}

/* --- Base --- */
html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-primary-dark); text-decoration: underline; }

img { max-width: 100%; height: auto; display: block; }

/* --- Utilitaires --- */
.container {
  width: 100%;
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.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;
}

.hidden { display: none !important; }

/* --- Focus accessible --- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.5rem;
}

.site-logo {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.site-logo:hover { color: var(--color-primary); text-decoration: none; }

.header-links {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
}
.header-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-light);
}
.header-links a:hover { color: var(--color-primary); text-decoration: none; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background: var(--color-text);
  color: #cbd5e1;
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-3xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-2xl);
}

.footer-logo {
  font-size: var(--text-xl);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-sm);
}

.footer-links h3 {
  color: #fff;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: var(--space-sm); }
.footer-links a { color: #94a3b8; font-size: var(--text-sm); }
.footer-links a:hover { color: #fff; }

.footer-bottom {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid #334155;
  font-size: var(--text-sm);
  color: #64748b;
  text-align: center;
}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #7c3aed 100%);
  color: #fff;
  padding: var(--space-3xl) 0;
  text-align: center;
}

.hero h1 {
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

.hero-subtitle {
  font-size: var(--text-lg);
  opacity: 0.9;
  margin-bottom: var(--space-xl);
}

/* --- Search Box --- */
.search-box {
  max-width: 32rem;
  margin: 0 auto;
  position: relative;
}

.search-input {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--text-lg);
  border: 2px solid transparent;
  border-radius: var(--radius-xl);
  background: rgba(255,255,255,0.95);
  color: var(--color-text);
  box-shadow: var(--shadow-lg);
  transition: border-color var(--transition);
}
.search-input::placeholder { color: var(--color-text-light); }
.search-input:focus {
  outline: none;
  border-color: var(--color-primary-dark);
}

.search-results {
  position: absolute;
  top: calc(100% + var(--space-xs));
  left: 0; right: 0;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  z-index: 50;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  color: var(--color-text);
  font-size: var(--text-base);
  transition: background var(--transition);
}
.search-result-item:hover {
  background: var(--color-primary-light);
  text-decoration: none;
}
.search-result-item mark {
  background: var(--color-highlight);
  border-radius: 2px;
  padding: 0 1px;
}

.search-no-result {
  padding: var(--space-md) var(--space-lg);
  color: var(--color-text-light);
  font-size: var(--text-sm);
  text-align: center;
}

/* ==========================================================================
   HOME SECTIONS
   ========================================================================== */
.home-section {
  margin-top: var(--space-3xl);
}

.home-section h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

.editorial-content p {
  margin-bottom: var(--space-md);
  line-height: 1.8;
  color: var(--color-text-light);
}
.editorial-content a { font-weight: 500; }

/* ==========================================================================
   GRILLES
   ========================================================================== */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
  gap: var(--space-lg);
}

.categories-grid--large {
  grid-template-columns: repeat(auto-fill, minmax(20rem, 1fr));
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
  gap: var(--space-lg);
}

.tools-grid--compact {
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: var(--space-md);
}

/* ==========================================================================
   CATEGORY CARD
   ========================================================================== */
.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition);
}
.category-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.category-card-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  color: var(--color-text);
}
.category-card-link:hover { text-decoration: none; }

.category-card-icon { font-size: 2rem; margin-bottom: var(--space-sm); }

.category-card-title {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.category-card-count, .category-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.category-card--large .category-card-link {
  flex-direction: row;
  text-align: left;
  gap: var(--space-lg);
  padding: var(--space-lg);
}

.category-card--large .category-card-icon { font-size: 2.5rem; flex-shrink: 0; }
.category-card--large .category-card-title { font-size: var(--text-lg); }

/* ==========================================================================
   TOOL CARD
   ========================================================================== */
.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition);
}
.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.tool-card-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  color: var(--color-text);
}
.tool-card-link:hover { text-decoration: none; }

.tool-card-icon { font-size: 1.75rem; flex-shrink: 0; }

.tool-card-body { flex: 1; min-width: 0; }

.tool-card-title {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.tool-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tool-card-arrow {
  color: var(--color-text-light);
  font-size: var(--text-lg);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.tool-card:hover .tool-card-arrow { transform: translateX(4px); color: var(--color-primary); }

/* ==========================================================================
   BREADCRUMBS
   ========================================================================== */
.breadcrumbs {
  padding: var(--space-lg) 0 var(--space-sm);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: var(--space-xs);
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.breadcrumbs li:not(:last-child)::after {
  content: "›";
  margin-left: var(--space-xs);
  color: var(--color-border);
}

.breadcrumbs a { color: var(--color-text-light); }
.breadcrumbs a:hover { color: var(--color-primary); }
.breadcrumbs [aria-current="page"] { color: var(--color-text); font-weight: 500; }

/* ==========================================================================
   TOOL PAGE
   ========================================================================== */
.tool-header {
  text-align: center;
  padding: var(--space-xl) 0 var(--space-lg);
}

.tool-icon { font-size: 3rem; display: block; margin-bottom: var(--space-sm); }

.tool-header h1 {
  font-size: var(--text-3xl);
  font-weight: 800;
  margin-bottom: var(--space-sm);
}

.tool-intro {
  font-size: var(--text-lg);
  color: var(--color-text-light);
  max-width: 40rem;
  margin: 0 auto;
}

/* --- Calculator Section --- */
.calculator-section {
  max-width: 36rem;
  margin: var(--space-xl) auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
}

/* --- Form --- */
.calculator-form .form-fields {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-group { display: flex; flex-direction: column; gap: var(--space-xs); }

.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.input-wrapper { position: relative; }

.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-base);
  font-family: var(--font-sans);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}
.form-input::placeholder { color: #94a3b8; }

.form-select {
  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='M6 8L1 3h10z' fill='%2364748b'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  padding-right: var(--space-2xl);
}

.input-with-unit .form-input {
  padding-right: 3rem;
}

.input-unit {
  position: absolute;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-light);
  font-size: var(--text-sm);
  font-weight: 500;
  pointer-events: none;
}

.form-error {
  font-size: var(--text-sm);
  color: var(--color-error);
  margin-top: var(--space-xs);
}

/* --- Button --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-xl);
  font-size: var(--text-base);
  font-weight: 600;
  font-family: var(--font-sans);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  margin-top: var(--space-lg);
  width: 100%;
  padding: var(--space-md);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }

/* --- Auto-submit: masquer le bouton quand Stimulus est actif --- */
.calculator-submit--hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Loading spinner --- */
.calculator-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  padding: var(--space-sm) 0;
  color: var(--color-text-light);
  font-size: var(--text-sm);
}

.calculator-spinner {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* --- Result --- */
.calculator-result {
  margin-top: var(--space-xl);
  padding: var(--space-lg);
  background: var(--color-success-bg);
  border: 1px solid #a7f3d0;
  border-radius: var(--radius-lg);
  animation: fadeInResult 0.25s ease-out;
}

@keyframes fadeInResult {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-title {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-success);
  margin-bottom: var(--space-md);
}

.result-values { display: flex; flex-direction: column; gap: var(--space-md); }

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid #d1fae5;
}
.result-item:last-child { border-bottom: none; padding-bottom: 0; }

.result-label {
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.result-value {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-success);
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   EDITORIAL CONTENT (dans les pages outils)
   ========================================================================== */
.editorial-section {
  max-width: 48rem;
  margin: var(--space-3xl) auto;
  line-height: 1.8;
}

.editorial-section h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin: var(--space-2xl) 0 var(--space-md);
  color: var(--color-text);
}

.editorial-section h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  margin: var(--space-xl) 0 var(--space-sm);
}

.editorial-section p {
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.editorial-section ul, .editorial-section ol {
  margin: var(--space-md) 0 var(--space-md) var(--space-xl);
}

.editorial-section li {
  margin-bottom: var(--space-sm);
}

.editorial-section table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
}

.editorial-section th, .editorial-section td {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  text-align: left;
}

.editorial-section th {
  background: var(--color-bg);
  font-weight: 600;
}

.editorial-section code {
  background: var(--color-bg);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.editorial-section blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-primary-light);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--space-lg) 0;
}

/* ==========================================================================
   FAQ SECTION
   ========================================================================== */
.faq-section {
  max-width: 48rem;
  margin: var(--space-3xl) auto;
}

.faq-section h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-lg);
}

.faq-list { margin: 0; }

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  overflow: hidden;
}

.faq-question {
  font-weight: normal;
}

.faq-question button {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-surface);
  border: none;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  text-align: left;
  font-family: var(--font-sans);
  transition: background var(--transition);
}
.faq-question button:hover { background: var(--color-bg); }

.faq-toggle {
  font-size: var(--text-xl);
  color: var(--color-primary);
  flex-shrink: 0;
  margin-left: var(--space-md);
  width: 1.5rem;
  text-align: center;
}

.faq-answer {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ==========================================================================
   RELATED TOOLS
   ========================================================================== */
.related-tools {
  margin: var(--space-3xl) 0;
}

.related-tools h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  text-align: center;
}

/* ==========================================================================
   CATEGORY PAGE
   ========================================================================== */
.category-header {
  text-align: center;
  padding: var(--space-xl) 0;
}

.category-icon { font-size: 3rem; display: block; margin-bottom: var(--space-sm); }

.category-header h1 {
  font-size: var(--text-3xl);
  font-weight: 800;
  margin-bottom: var(--space-sm);
}

.category-description {
  max-width: 40rem;
  margin: 0 auto;
  color: var(--color-text-light);
  font-size: var(--text-lg);
}

/* ==========================================================================
   STATIC PAGES
   ========================================================================== */
.static-page .container {
  max-width: 48rem;
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}

.static-page h1 {
  font-size: var(--text-3xl);
  font-weight: 800;
  margin-bottom: var(--space-xl);
}

.static-page p {
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

/* ==========================================================================
   BACK NAV
   ========================================================================== */
.back-nav {
  margin: var(--space-2xl) 0;
  text-align: center;
}

.back-nav a { font-weight: 500; }

/* ==========================================================================
   PAGE INTRO
   ========================================================================== */
.page-intro {
  font-size: var(--text-lg);
  color: var(--color-text-light);
  margin-bottom: var(--space-2xl);
}

/* ==========================================================================
   CATEGORIES PAGE (INDEX)
   ========================================================================== */
.categories-page .container {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-3xl);
}

.categories-page h1 {
  font-size: var(--text-3xl);
  font-weight: 800;
  margin-bottom: var(--space-md);
}

/* ==========================================================================
   SPLITS TABLE (Running calculator)
   ========================================================================== */
.result-item--full {
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-sm);
}

.result-item--full .result-value {
  width: 100%;
}

.splits-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  margin-top: var(--space-xs);
}

.splits-table thead tr {
  background: var(--color-primary);
  color: #fff;
}

.splits-table thead th {
  padding: var(--space-xs) var(--space-md);
  text-align: left;
  font-weight: 600;
}

.splits-table tbody tr {
  border-bottom: 1px solid var(--color-border);
}

.splits-table tbody tr:nth-child(even) {
  background: var(--color-surface);
}

.splits-table tbody td {
  padding: var(--space-xs) var(--space-md);
  color: var(--color-text);
}

.splits-table tbody tr.split-finish {
  font-weight: 700;
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
}

.splits-table tbody tr.split-finish td {
  color: var(--color-primary-dark);
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 768px) {
  .hero h1 { font-size: var(--text-2xl); }
  .hero-subtitle { font-size: var(--text-base); }
  .tool-header h1 { font-size: var(--text-2xl); }
  .category-header h1 { font-size: var(--text-2xl); }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .categories-grid {
    grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
  }

  .tools-grid {
    grid-template-columns: 1fr;
  }

  .calculator-section {
    margin: var(--space-lg) auto;
    padding: var(--space-lg);
  }

  .result-item {
    flex-direction: column;
    gap: var(--space-xs);
  }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-md); }
  .hero { padding: var(--space-2xl) 0; }
  .hero h1 { font-size: var(--text-xl); }

  .header-links { gap: var(--space-md); }

  .calculator-section { padding: var(--space-md); }
}