/* ==========================================================================
   BPA-STYLES.CSS — Design system global — Bon Plan Auto
   Mobile first — Inter — Grille 8px — Préfixe bpa-
   ========================================================================== */

/* === IMPORT POLICE === */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* === VARIABLES === */
:root {
  /* Couleurs */
  --color-navy:        #1E3A8A;
  --color-navy-dark:   #162C6E;
  --color-blue:        #60A5FA;
  --color-blue-mid:    #3B82F6;
  --color-green:       #16A34A;
  --color-green-light: #DCFCE7;
  --color-grey:        #6B7280;
  --color-grey-dark:   #1F2937;
  --color-grey-mid:    #374151;
  --color-grey-light:  #F8FAFC;
  --color-grey-border: #E2E8F0;
  --color-white:       #FFFFFF;
  --color-amber:       #D97706;
  --color-red:         #DC2626;

  /* Espacement — grille 8px */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;

  /* Largeurs max */
  --max-w-global:  1200px;
  --max-w-blog:    760px;
  --max-w-tool:    640px;

  /* Bordures */
  --radius-card:   8px;
  --radius-badge:  6px;
  --radius-btn:    8px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-grey-mid);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* === TYPOGRAPHIE === */
h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-grey-dark);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: -0.01em;
  line-height: 1.4;
}

h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-grey-dark);
  line-height: 1.4;
}

p {
  max-width: 680px;
  line-height: 1.7;
}

.bpa-text-secondary {
  font-size: 0.875rem;
  color: var(--color-grey);
}

.bpa-text-small {
  font-size: 0.75rem;
  color: var(--color-grey);
}

@media (min-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
}

/* === LAYOUT === */
.bpa-container {
  max-width: var(--max-w-global);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.bpa-section {
  padding: var(--space-6) var(--space-3);
}

.bpa-section--alt {
  background: var(--color-grey-light);
}

@media (min-width: 768px) {
  .bpa-container {
    padding: 0 var(--space-4);
  }

  .bpa-section {
    padding: var(--space-7) var(--space-4);
  }
}

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

.bpa-nav {
  max-width: var(--max-w-global);
  margin: 0 auto;
  padding: 0 var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  position: relative;
}

.bpa-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.bpa-nav-links {
  display: none;
  flex-direction: column;
  gap: 0;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-grey-border);
  padding: var(--space-3) var(--space-3);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.bpa-nav-links.is-open {
  display: flex;
}

.bpa-nav-links li a {
  display: block;
  padding: var(--space-2) 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-grey-mid);
  border-bottom: 1px solid var(--color-grey-border);
}

.bpa-nav-links li:last-child a {
  border-bottom: none;
}

.bpa-nav-links a:hover {
  color: var(--color-navy);
}

.bpa-nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.bpa-cta-nav {
  background: var(--color-green);
  color: var(--color-white) !important;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-badge);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.2s;
}

.bpa-cta-nav:hover {
  background: #15803D;
}

.bpa-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  padding: 0;
}

.bpa-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-grey-dark);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.bpa-hamburger.is-active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.bpa-hamburger.is-active span:nth-child(2) {
  opacity: 0;
}

.bpa-hamburger.is-active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

@media (min-width: 768px) {
  .bpa-nav {
    padding: 0 var(--space-4);
  }

  .bpa-nav-links {
    display: flex;
    flex-direction: row;
    position: static;
    background: none;
    border: none;
    padding: 0;
    box-shadow: none;
    gap: var(--space-5);
  }

  .bpa-nav-links li a {
    padding: 0;
    border-bottom: none;
    font-size: 15px;
  }

  .bpa-hamburger {
    display: none;
  }
}

/* === BANDEAU RÉASSURANCE === */
.bpa-reassurance {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  background: var(--color-green-light);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-card);
  margin: var(--space-4) 0;
}

.bpa-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 14px;
  font-weight: 600;
  color: #166534;
}

.bpa-badge-icon {
  font-size: 16px;
  line-height: 1;
}

/* === FORMULAIRE DEVIS PIÈCE === */
.bpa-form-wrapper {
  max-width: var(--max-w-tool);
  margin: 0 auto;
  background: var(--color-white);
  padding: var(--space-5) var(--space-3);
  border: 1px solid var(--color-grey-border);
  border-radius: var(--radius-card);
}

.bpa-form-wrapper h2 {
  margin-bottom: var(--space-2);
}

.bpa-form-wrapper > p {
  font-size: 15px;
  color: var(--color-grey);
  margin-bottom: var(--space-1);
}

.bpa-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: var(--space-4);
}

.bpa-field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-grey-dark);
}

.bpa-field input,
.bpa-field select,
.bpa-field textarea {
  padding: 12px var(--space-3);
  border: 1px solid var(--color-grey-border);
  border-radius: var(--radius-card);
  font-family: inherit;
  font-size: 16px;
  color: var(--color-grey-dark);
  background: var(--color-white);
  transition: border-color 0.2s;
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
}

.bpa-field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.bpa-field input:focus,
.bpa-field select:focus,
.bpa-field textarea:focus {
  border-color: var(--color-blue-mid);
  outline: none;
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.bpa-field input:disabled,
.bpa-field select:disabled {
  background: var(--color-grey-light);
  color: var(--color-grey);
  cursor: not-allowed;
}

.bpa-field-error {
  font-size: 12px;
  color: var(--color-red);
  margin-top: 2px;
}

/* Honeypot — caché visuellement */
.bpa-honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
  tabindex: -1;
}

.bpa-form-legal {
  font-size: 12px;
  color: var(--color-grey);
  margin-top: var(--space-3);
}

.bpa-form-legal a {
  color: var(--color-navy);
  text-decoration: underline;
}

/* Message succès formulaire */
.bpa-form-success {
  display: none;
  text-align: center;
  padding: var(--space-6) var(--space-4);
}

.bpa-form-success.is-visible {
  display: block;
}

.bpa-form-success-icon {
  font-size: 48px;
  margin-bottom: var(--space-3);
}

.bpa-form-success h3 {
  color: #166534;
  margin-bottom: var(--space-2);
}

.bpa-form-success p {
  font-size: 15px;
  color: var(--color-grey);
  max-width: 400px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .bpa-form-wrapper {
    padding: var(--space-6) 40px;
  }
}

/* === BOUTONS === */
.bpa-btn-primary {
  display: block;
  width: 100%;
  background: var(--color-green);
  color: var(--color-white);
  padding: 14px var(--space-5);
  border: none;
  border-radius: var(--radius-btn);
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: background 0.2s;
}

.bpa-btn-primary:hover {
  background: #15803D;
}

.bpa-btn-primary:disabled {
  background: #86EFAC;
  cursor: not-allowed;
}

.bpa-btn-secondary {
  display: inline-block;
  background: var(--color-white);
  color: var(--color-navy);
  padding: 12px var(--space-4);
  border: 2px solid var(--color-navy);
  border-radius: var(--radius-btn);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: background 0.2s;
}

.bpa-btn-secondary:hover {
  background: var(--color-grey-light);
}

.bpa-btn-ghost {
  display: inline-block;
  background: transparent;
  color: var(--color-grey);
  padding: 10px var(--space-4);
  border: 1px solid var(--color-grey-border);
  border-radius: var(--radius-btn);
  font-family: inherit;
  font-size: 14px;
  font-weight: 400;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.bpa-btn-ghost:hover {
  background: var(--color-grey-light);
  color: var(--color-grey-dark);
}

/* === CARDS OUTILS === */
.bpa-tools-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.bpa-tool-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--color-white);
  padding: var(--space-4);
  border: 1px solid var(--color-grey-border);
  border-radius: var(--radius-card);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.bpa-tool-card:hover {
  border-color: var(--color-navy);
  box-shadow: 0 4px 12px rgba(30,58,138,0.08);
}

.bpa-tool-icon {
  font-size: 28px;
  line-height: 1;
}

.bpa-tool-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-grey-dark);
  margin: 0;
}

.bpa-tool-card p {
  font-size: 14px;
  color: var(--color-grey);
  margin: 0;
  flex: 1;
}

.bpa-tool-cta {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-navy);
}

@media (min-width: 640px) {
  .bpa-tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .bpa-tools-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }

  .bpa-tool-card {
    padding: 28px;
  }
}

/* === RESULT BOX (résultats de calcul) === */
.bpa-result-box {
  background: var(--color-grey-light);
  border: 1px solid var(--color-grey-border);
  border-radius: var(--radius-card);
  padding: var(--space-4);
  margin: var(--space-4) 0;
}

.bpa-result-box--highlight {
  border-color: var(--color-navy);
  background: #EFF6FF;
}

.bpa-result-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-grey);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-1);
}

.bpa-result-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.2;
}

.bpa-result-unit {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-grey);
}

/* === BADGES PRIX === */
.bpa-price-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-badge);
  font-size: 12px;
  font-weight: 600;
}

.bpa-price-badge--good {
  background: var(--color-green-light);
  color: #166534;
}

.bpa-price-badge--high {
  background: #FEF3C7;
  color: #92400E;
}

.bpa-price-badge--expensive {
  background: #FEE2E2;
  color: #991B1B;
}

/* === ALERTE / NOTICE === */
.bpa-notice {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-card);
  font-size: 14px;
  line-height: 1.5;
}

.bpa-notice--info {
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  color: #1E40AF;
}

.bpa-notice--warning {
  background: #FFFBEB;
  border: 1px solid #FDE68A;
  color: #92400E;
}

/* === FOOTER === */
.bpa-footer-logo {
  filter: brightness(0) invert(1);
}

.bpa-footer {
  background: var(--color-grey-dark);
  color: var(--color-white);
  margin-top: var(--space-8);
}

.bpa-footer-inner {
  max-width: var(--max-w-global);
  margin: 0 auto;
  padding: var(--space-7) var(--space-3) var(--space-5);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.bpa-footer-brand p {
  color: #9CA3AF;
  font-size: 14px;
  margin-top: 12px;
  max-width: 320px;
}

.bpa-footer-links h4 {
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.bpa-footer-links a {
  display: block;
  color: #9CA3AF;
  font-size: 14px;
  text-decoration: none;
  margin-bottom: var(--space-2);
  transition: color 0.2s;
}

.bpa-footer-links a:hover {
  color: var(--color-white);
}

.bpa-footer-bottom {
  border-top: 1px solid #374151;
  padding: var(--space-4) var(--space-3);
  text-align: center;
  color: var(--color-grey);
  font-size: 13px;
}

@media (min-width: 768px) {
  .bpa-footer-inner {
    padding: var(--space-7) var(--space-4) var(--space-5);
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-6);
  }

  .bpa-footer-bottom {
    padding: var(--space-4) var(--space-4);
  }
}

/* === UTILITAIRES === */
.bpa-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;
}

.bpa-divider {
  border: none;
  border-top: 1px solid var(--color-grey-border);
  margin: var(--space-5) 0;
}

.bpa-mt-2  { margin-top: var(--space-2); }
.bpa-mt-3  { margin-top: var(--space-3); }
.bpa-mt-4  { margin-top: var(--space-4); }
.bpa-mb-4  { margin-bottom: var(--space-4); }
.bpa-mb-6  { margin-bottom: var(--space-6); }