/* ========================================
   LA COMPTA FACILE - Design System
   ======================================== */

:root {
  --primary:       #1a5276;
  --primary-light: #2980b9;
  --primary-pale:  #d6eaf8;
  --primary-bg:    #eaf2f8;
  --dark:          #0e2f44;
  --dark-deeper:   #091f2c;
  --text:          #2c3e50;
  --text-light:    #5d6d7e;
  --bg:            #ffffff;
  --bg-alt:        #f4f7fa;
  --border:        rgba(26,82,118,0.12);
  --shadow:        rgba(26,82,118,0.10);
  --accent:        #e67e22;
  --radius:        8px;
  --radius-lg:     12px;
}

/* ========================================
   RESET & BASE
   ======================================== */

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

html {
  font-size: 18px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--primary);
}

ul {
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: 'Merriweather', Georgia, serif;
  color: var(--dark);
  line-height: 1.3;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   HEADER
   ======================================== */

.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 68px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 6px;
  font-family: 'Inter', sans-serif;
}

.logo-text {
  font-size: 1.05rem;
  color: var(--dark);
  font-family: 'Inter', sans-serif;
  font-weight: 500;
}

.logo-text strong {
  color: var(--primary);
  font-weight: 700;
}

.main-nav {
  flex: 1;
}

.nav-list {
  display: flex;
  gap: 8px;
}

.nav-list a {
  display: block;
  padding: 8px 16px;
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
}

.nav-list a:hover,
.nav-list a.active {
  background: var(--primary-pale);
  color: var(--primary);
}

.header-search {
  flex-shrink: 0;
}

.header-search form {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-alt);
}

.header-search input {
  border: none;
  background: transparent;
  padding: 8px 12px;
  font-size: 0.82rem;
  width: 180px;
  color: var(--text);
  font-family: 'Inter', sans-serif;
}

.header-search input::placeholder {
  color: var(--text-light);
}

.header-search input:focus {
  outline: none;
}

.header-search button {
  border: none;
  background: transparent;
  padding: 8px 10px;
  cursor: pointer;
  color: var(--text-light);
  display: flex;
  align-items: center;
}

.header-search button:hover {
  color: var(--primary);
}

/* Burger */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.burger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger.open span:nth-child(2) {
  opacity: 0;
}

.burger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--dark);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

/* ========================================
   HOME INTRO
   ======================================== */

.home-intro {
  background: linear-gradient(135deg, var(--primary-bg) 0%, #fff 100%);
  padding: 64px 0 56px;
}

.home-intro-inner {
  display: flex;
  align-items: center;
  gap: 48px;
}

.home-intro-text {
  flex: 1;
}

.home-intro-text h1 {
  font-size: 2.4rem;
  margin-bottom: 16px;
  color: var(--dark);
}

.home-intro-text h1 strong {
  color: var(--primary-light);
}

.home-intro-subtitle {
  font-size: 1.05rem;
  color: var(--text-light);
  margin-bottom: 32px;
  max-width: 480px;
  line-height: 1.7;
}

.home-intro-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.home-intro-visual {
  flex-shrink: 0;
  width: 46%;
  max-width: 520px;
}

.intro-img-frame {
  position: relative;
  background: linear-gradient(145deg, #c8dff4 0%, var(--primary-bg) 55%, #daeaf8 100%);
  border-radius: 24px;
  padding: 32px 28px 0;
  overflow: hidden;
}

.intro-img-frame::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  background: rgba(41, 128, 185, 0.07);
  border-radius: 50%;
}

.intro-img-frame::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: -30px;
  width: 140px;
  height: 140px;
  background: rgba(26, 82, 118, 0.05);
  border-radius: 50%;
}

.intro-img-frame img {
  display: block;
  width: 100%;
  height: auto;
  position: relative;
  z-index: 1;
  border-radius: 0;
}

/* ========================================
   LEXIQUE SEARCH
   ======================================== */

.home-lexique-search {
  padding: 56px 0 48px;
  background: var(--bg);
  text-align: center;
}

.home-lexique-search h2 {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.section-subtitle {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 28px;
}

.lexique-search-form {
  display: flex;
  max-width: 520px;
  margin: 0 auto 32px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
  box-shadow: 0 2px 12px var(--shadow);
}

.lexique-search-form input {
  flex: 1;
  border: none;
  padding: 14px 20px;
  font-size: 0.95rem;
  font-family: 'Inter', sans-serif;
  color: var(--text);
}

.lexique-search-form input::placeholder {
  color: var(--text-light);
}

.lexique-search-form input:focus {
  outline: none;
}

.lexique-search-form .btn {
  border-radius: 0;
  border: none;
  padding: 14px 24px;
}

/* Alphabet nav */
.alphabet-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
}

.alphabet-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--primary);
  background: var(--primary-pale);
  transition: background 0.2s, color 0.2s;
}

.alphabet-nav a:hover {
  background: var(--primary);
  color: #fff;
}

/* ========================================
   THREE COLUMNS
   ======================================== */

.home-three-cols {
  padding: 48px 0;
  background: var(--bg-alt);
}

.three-cols-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.col-block {
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 2px 12px var(--shadow);
}

.col-block h3 {
  font-size: 1.05rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-pale);
}

.col-block-accent {
  background: linear-gradient(135deg, var(--primary-bg), #fff);
}

.col-list li {
  margin-bottom: 10px;
}

.col-list a {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 0.9rem;
  padding: 6px 0;
  transition: color 0.2s;
}

.col-list a::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary-light);
  flex-shrink: 0;
}

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

/* ========================================
   A-Z GRID
   ======================================== */

.home-az {
  padding: 56px 0;
  background: var(--bg);
  text-align: center;
}

.az-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.az-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 20px;
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: box-shadow 0.2s, transform 0.2s;
  text-decoration: none;
}

.az-card:hover {
  box-shadow: 0 6px 24px var(--shadow);
  transform: translateY(-2px);
}

.az-letter {
  font-family: 'Merriweather', serif;
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}

.az-label {
  font-size: 0.88rem;
  color: var(--text);
  font-weight: 500;
  margin-bottom: 8px;
}

.az-action {
  font-size: 0.78rem;
  color: var(--primary-light);
  font-weight: 500;
}

/* ========================================
   BOTTOM COLUMNS
   ======================================== */

.home-bottom-cols {
  padding: 48px 0;
  background: var(--bg-alt);
}

.bottom-cols-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.bottom-col {
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 0 2px 12px var(--shadow);
}

.bottom-col h3 {
  font-size: 1.1rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-pale);
}

.resource-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.resource-list li:last-child {
  border-bottom: none;
}

.resource-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--primary-pale);
  border-radius: 8px;
  color: var(--primary);
  flex-shrink: 0;
}

.resource-list a {
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 500;
}

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

/* ========================================
   FOOTER
   ======================================== */

.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding-top: 48px;
}

.footer-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  padding-bottom: 40px;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  margin-bottom: 16px;
  font-family: 'Inter', sans-serif;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: rgba(255,255,255,0.65);
  font-size: 0.85rem;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
  text-align: center;
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 1024px) {
  .home-intro-inner {
    gap: 32px;
  }

  .home-intro-visual {
    width: 46%;
    max-width: 420px;
  }

  .az-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  html {
    font-size: 16px;
  }

  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .main-nav,
  .header-search {
    display: none;
    width: 100%;
  }

  .main-nav.open,
  .header-search.open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    padding: 12px 0;
  }

  .nav-list a {
    padding: 10px 0;
  }

  .header-search {
    padding-bottom: 12px;
  }

  .header-search input {
    width: 100%;
  }

  .burger {
    display: flex;
    margin-left: auto;
  }

  /* Intro */
  .home-intro {
    padding: 40px 0;
  }

  .home-intro-inner {
    flex-direction: column;
    text-align: center;
  }

  .home-intro-text h1 {
    font-size: 1.8rem;
  }

  .home-intro-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .home-intro-buttons {
    justify-content: center;
  }

  .home-intro-visual {
    width: 100%;
    max-width: 100%;
  }

  .intro-img-frame {
    padding: 24px 20px 0;
  }

  /* Grid sections */
  .three-cols-grid {
    grid-template-columns: 1fr;
  }

  .az-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .bottom-cols-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  /* Alphabet */
  .alphabet-nav a {
    width: 34px;
    height: 34px;
    font-size: 0.75rem;
  }
}

@media (max-width: 480px) {
  .home-intro-text h1 {
    font-size: 1.5rem;
  }

  .az-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .az-card {
    padding: 20px 12px;
  }

  .az-letter {
    font-size: 1.6rem;
  }

  .lexique-search-form {
    flex-direction: column;
  }

  .lexique-search-form .btn {
    border-radius: 0;
  }
}

/* ========================================
   404
   ======================================== */

.error-404 {
  padding: 80px 20px;
  text-align: center;
}

.error-404-inner {
  max-width: 560px;
  margin: 0 auto;
}

.error-code {
  display: block;
  font-size: 6rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-404 h1 {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

.error-404 p {
  color: var(--text-light);
  margin-bottom: 32px;
}

.btn-home {
  display: inline-block;
  padding: 12px 28px;
  background: var(--primary);
  color: #fff;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  margin-bottom: 48px;
}

.error-suggestions h2 {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 12px;
}

.error-suggestions li {
  margin-bottom: 8px;
}

.error-suggestions a {
  color: var(--primary);
  text-decoration: underline;
}