/* ============================================================
   CodesNAF.com — Feuille de style principale
   Style : sobre, professionnel, blanc/bleu/gris
   Typo  : DM Sans (corps) + DM Mono (codes)
   ============================================================ */

/* --- Variables --- */
:root {
    --blue:        #1a56db;
    --blue-dark:   #1039a8;
    --blue-light:  #e8f0fe;
    --blue-mid:    #93b4f7;
    --naf25:       #0d9488;   /* Teal pour NAF 2025 */
    --naf25-light: #ccfbf1;
    --naf08:       #1a56db;   /* Bleu pour NAF 2008 */
    --naf08-light: #e8f0fe;
    --gray-900:    #111827;
    --gray-700:    #374151;
    --gray-500:    #6b7280;
    --gray-300:    #d1d5db;
    --gray-100:    #f3f4f6;
    --gray-50:     #f9fafb;
    --white:       #ffffff;
    --radius:      8px;
    --radius-lg:   12px;
    --shadow-sm:   0 1px 3px rgba(0,0,0,.08);
    --shadow:      0 4px 16px rgba(0,0,0,.10);
    --shadow-lg:   0 8px 32px rgba(0,0,0,.14);
    --font:        'DM Sans', sans-serif;
    --mono:        'DM Mono', monospace;
    --transition:  .18s ease;
}

/* --- Reset de base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--white);
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

/* --- Conteneur --- */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-300);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.logo {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: -.5px;
    text-decoration: none;
}
.logo-codes { color: var(--gray-900); }
.logo-naf   { color: var(--blue); }
.logo-tld   { color: var(--gray-500); font-size: .9em; }

.main-nav { display: flex; gap: 8px; }
.main-nav a {
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: .93rem;
    font-weight: 500;
    color: var(--gray-700);
    transition: background var(--transition), color var(--transition);
}
.main-nav a:hover, .main-nav a.active {
    background: var(--blue-light);
    color: var(--blue);
    text-decoration: none;
}
.nav-toggle { display: none; background: none; border: none; font-size: 1.4rem; cursor: pointer; color: var(--gray-700); }

/* ============================================================
   HERO (page d'accueil)
   ============================================================ */
.hero {
    background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 60%, #f0fdfa 100%);
    padding: 72px 0 56px;
    text-align: center;
    border-bottom: 1px solid var(--gray-300);
}
.hero h1 {
    font-size: 2.6rem;
    font-weight: 600;
    color: var(--gray-900);
    letter-spacing: -.5px;
    margin-bottom: 12px;
    line-height: 1.2;
}
.hero h1 span { color: var(--blue); }
.hero p {
    font-size: 1.1rem;
    color: var(--gray-500);
    max-width: 520px;
    margin: 0 auto 36px;
}

/* --- Barre de recherche --- */
.search-box {
    max-width: 640px;
    margin: 0 auto;
    position: relative;
}
.search-box form { display: flex; gap: 8px; }
.search-input {
    flex: 1;
    padding: 14px 20px;
    font-size: 1rem;
    font-family: var(--font);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
    background: var(--white);
}
.search-input:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(26,86,219,.15);
}
.btn {
    padding: 14px 24px;
    background: var(--blue);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: var(--font);
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
    white-space: nowrap;
}
.btn:hover { background: var(--blue-dark); transform: translateY(-1px); }
.btn-sm { padding: 8px 16px; font-size: .875rem; }
.btn-outline {
    background: var(--white);
    color: var(--blue);
    border: 2px solid var(--blue);
}
.btn-outline:hover { background: var(--blue-light); transform: none; }

/* Filtre nomenclature sous la recherche */
.search-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 14px;
    flex-wrap: wrap;
}
.filter-chip {
    padding: 6px 16px;
    border-radius: 20px;
    font-size: .85rem;
    font-weight: 500;
    cursor: pointer;
    border: 2px solid var(--gray-300);
    background: var(--white);
    color: var(--gray-700);
    transition: all var(--transition);
}
.filter-chip:hover, .filter-chip.active { border-color: var(--blue); color: var(--blue); background: var(--blue-light); }
.filter-chip.naf25.active { border-color: var(--naf25); color: var(--naf25); background: var(--naf25-light); }

/* ============================================================
   BADGES nomenclature
   ============================================================ */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: .78rem;
    font-weight: 600;
    letter-spacing: .3px;
    text-transform: uppercase;
}
.badge-naf2008 { background: var(--naf08-light); color: var(--blue-dark); }
.badge-naf2025 { background: var(--naf25-light); color: #0f766e; }
.badge-new     { background: #fef9c3; color: #854d0e; }

/* ============================================================
   SECTIONS ACCUEIL
   ============================================================ */
.home-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    padding: 48px 0;
}
.stat-card {
    text-align: center;
    padding: 28px 20px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    background: var(--white);
    transition: box-shadow var(--transition), transform var(--transition);
}
.stat-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.stat-number { font-size: 2.4rem; font-weight: 600; color: var(--blue); letter-spacing: -1px; }
.stat-label  { font-size: .9rem; color: var(--gray-500); margin-top: 4px; }

.home-features {
    background: var(--gray-50);
    padding: 56px 0;
    border-top: 1px solid var(--gray-300);
    border-bottom: 1px solid var(--gray-300);
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 32px;
}
.feature-card {
    padding: 28px 24px;
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-300);
}
.feature-icon { font-size: 2rem; margin-bottom: 12px; }
.feature-card h3 { font-size: 1.05rem; font-weight: 600; color: var(--gray-900); margin-bottom: 8px; }
.feature-card p  { font-size: .9rem; color: var(--gray-500); }

.section-title {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--gray-900);
    text-align: center;
    margin-bottom: 8px;
}
.section-subtitle {
    text-align: center;
    color: var(--gray-500);
    font-size: .95rem;
}

/* ============================================================
   PAGE RÉSULTATS
   ============================================================ */
.page-header {
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-300);
    padding: 32px 0 24px;
}
.page-header h1 { font-size: 1.6rem; font-weight: 600; color: var(--gray-900); margin-bottom: 4px; }
.page-header p  { color: var(--gray-500); font-size: .95rem; }

.search-bar-inline {
    display: flex;
    gap: 8px;
    margin: 20px 0 0;
    max-width: 580px;
}

.results-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 32px;
    padding: 32px 0;
    align-items: start;
}
.filters-sidebar { position: sticky; top: 84px; }
.filter-group { margin-bottom: 20px; }
.filter-group h4 { font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; color: var(--gray-500); margin-bottom: 10px; }
.filter-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background var(--transition);
    font-size: .9rem;
}
.filter-option:hover  { background: var(--gray-100); }
.filter-option input  { accent-color: var(--blue); }

.results-count { font-size: .9rem; color: var(--gray-500); margin-bottom: 16px; }
.results-count strong { color: var(--gray-900); }

.result-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 18px 20px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    margin-bottom: 10px;
    background: var(--white);
    transition: box-shadow var(--transition), border-color var(--transition);
    text-decoration: none;
    color: inherit;
}
.result-card:hover {
    box-shadow: var(--shadow);
    border-color: var(--blue-mid);
    text-decoration: none;
}
.result-code {
    font-family: var(--mono);
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--blue);
    min-width: 72px;
    padding-top: 2px;
}
.result-body { flex: 1; }
.result-title { font-weight: 500; color: var(--gray-900); margin-bottom: 4px; }
.result-meta  { font-size: .82rem; color: var(--gray-500); display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

/* Pagination */
.pagination {
    display: flex;
    gap: 6px;
    justify-content: center;
    padding: 32px 0;
    flex-wrap: wrap;
}
.page-link {
    padding: 8px 14px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: .9rem;
    color: var(--gray-700);
    transition: all var(--transition);
}
.page-link:hover { background: var(--blue-light); border-color: var(--blue); color: var(--blue); text-decoration: none; }
.page-link.active { background: var(--blue); border-color: var(--blue); color: var(--white); }
.page-link.disabled { opacity: .4; pointer-events: none; }

/* ============================================================
   PAGE DÉTAIL CODE
   ============================================================ */
.code-hero {
    background: linear-gradient(135deg, #f0f4ff, #e8f0fe);
    padding: 40px 0 32px;
    border-bottom: 1px solid var(--gray-300);
}
.code-hero-inner { display: flex; align-items: flex-start; gap: 24px; }
.code-badge-large {
    font-family: var(--mono);
    font-size: 2.2rem;
    font-weight: 500;
    color: var(--blue);
    background: var(--white);
    border: 2px solid var(--blue-mid);
    border-radius: var(--radius-lg);
    padding: 12px 24px;
    white-space: nowrap;
}
.code-meta-block h1 { font-size: 1.7rem; font-weight: 600; color: var(--gray-900); margin-bottom: 8px; }

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
    font-size: .85rem;
    color: var(--gray-500);
    margin-bottom: 12px;
}
.breadcrumb a { color: var(--blue); }
.breadcrumb span { color: var(--gray-400); }

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 32px;
    padding: 36px 0;
    align-items: start;
}

.card {
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-300);
    background: var(--gray-50);
    font-weight: 600;
    font-size: .95rem;
    color: var(--gray-700);
}
.card-body { padding: 20px; }

.corresp-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--gray-100);
}
.corresp-item:last-child { border-bottom: none; }
.corresp-code { font-family: var(--mono); font-weight: 500; color: var(--naf25); min-width: 72px; }
.corresp-type {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: .75rem;
    font-weight: 600;
}
.type-exact        { background: #dcfce7; color: #166534; }
.type-partiel      { background: #fef9c3; color: #854d0e; }
.type-eclatement   { background: #fee2e2; color: #991b1b; }
.type-regroupement { background: #f3e8ff; color: #6b21a8; }

/* ============================================================
   PAGE ARBORESCENCE
   ============================================================ */
.arbo-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 0;
    min-height: calc(100vh - 64px);
}
.arbo-sidebar {
    border-right: 1px solid var(--gray-300);
    padding: 24px 0;
    position: sticky;
    top: 64px;
    height: calc(100vh - 64px);
    overflow-y: auto;
}
.arbo-content { padding: 32px; }

.nom-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 0;
    border-bottom: 2px solid var(--gray-300);
}
.nom-tab {
    padding: 10px 20px;
    font-size: .9rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    color: var(--gray-500);
    transition: all var(--transition);
}
.nom-tab:hover { color: var(--blue); }
.nom-tab.active { color: var(--blue); border-bottom-color: var(--blue); }
.nom-tab.naf25.active { color: var(--naf25); border-bottom-color: var(--naf25); }

.tree-section { margin-bottom: 4px; }
.tree-section-btn {
    width: 100%;
    text-align: left;
    padding: 10px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font);
    font-size: .9rem;
    font-weight: 600;
    color: var(--gray-900);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background var(--transition);
}
.tree-section-btn:hover { background: var(--gray-100); }
.tree-section-btn .sec-code {
    font-family: var(--mono);
    font-size: .8rem;
    background: var(--blue-light);
    color: var(--blue);
    padding: 2px 8px;
    border-radius: 4px;
    min-width: 26px;
    text-align: center;
}
.tree-children { display: none; padding-left: 16px; }
.tree-children.open { display: block; }

.tree-item {
    display: flex;
    align-items: center;
    padding: 7px 16px;
    gap: 10px;
    font-size: .875rem;
    color: var(--gray-700);
    cursor: pointer;
    border-radius: var(--radius);
    transition: background var(--transition);
}
.tree-item:hover, .tree-item.active { background: var(--blue-light); color: var(--blue); }
.tree-item .item-code { font-family: var(--mono); font-size: .8rem; color: var(--gray-500); min-width: 42px; }

.arbo-main-panel h2 { font-size: 1.3rem; font-weight: 600; color: var(--gray-900); margin-bottom: 20px; }
.sous-classes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 12px;
}
.sc-card {
    padding: 14px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    background: var(--white);
    transition: box-shadow var(--transition), border-color var(--transition);
    text-decoration: none;
    color: inherit;
    display: block;
}
.sc-card:hover { box-shadow: var(--shadow-sm); border-color: var(--blue-mid); text-decoration: none; }
.sc-card .sc-code { font-family: var(--mono); font-size: .95rem; font-weight: 500; color: var(--blue); margin-bottom: 4px; }
.sc-card .sc-lib  { font-size: .875rem; color: var(--gray-700); line-height: 1.4; }

/* ============================================================
   PAGE COMPARAISON
   ============================================================ */
.comparaison-header {
    background: linear-gradient(135deg, #f0f4ff, #f0fdfa);
    padding: 40px 0;
    border-bottom: 1px solid var(--gray-300);
    text-align: center;
}
.compare-search {
    max-width: 480px;
    margin: 24px auto 0;
    display: flex;
    gap: 8px;
}
.compare-table-wrap { overflow-x: auto; margin-top: 32px; }
.compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .9rem;
}
.compare-table th {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 2px solid var(--gray-300);
    font-size: .8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .4px;
    color: var(--gray-500);
    white-space: nowrap;
}
.compare-table th.naf08 { color: var(--blue); }
.compare-table th.naf25 { color: var(--naf25); }
.compare-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-100);
    vertical-align: top;
}
.compare-table tr:hover td { background: var(--gray-50); }
.compare-table td.code-cell { font-family: var(--mono); font-weight: 500; white-space: nowrap; }
.compare-table td.code-cell.naf08 { color: var(--blue); }
.compare-table td.code-cell.naf25 { color: var(--naf25); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 48px 0 24px;
    margin-top: 64px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 32px;
}
.footer-brand .logo-codes { color: var(--white); }
.footer-brand .logo-naf   { color: var(--blue-mid); }
.footer-brand .logo-tld   { color: var(--gray-500); }
.footer-brand p { font-size: .875rem; color: var(--gray-500); margin-top: 10px; line-height: 1.5; }
.footer-links h4 { font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; color: var(--white); margin-bottom: 12px; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 8px; }
.footer-links a  { color: var(--gray-500); font-size: .875rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--white); text-decoration: none; }
.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 20px;
    font-size: .8rem;
    color: var(--gray-500);
    text-align: center;
}
.footer-bottom a { color: var(--gray-400); }

/* ============================================================
   UTILITAIRES
   ============================================================ */
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.text-center { text-align: center; }
.text-muted   { color: var(--gray-500); font-size: .875rem; }
.highlight em { background: #fef08a; padding: 0 2px; border-radius: 2px; font-style: normal; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
    .hero h1 { font-size: 2rem; }
    .home-stats, .features-grid { grid-template-columns: 1fr 1fr; }
    .results-layout { grid-template-columns: 1fr; }
    .filters-sidebar { position: static; }
    .detail-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .arbo-layout { grid-template-columns: 1fr; }
    .arbo-sidebar { position: static; height: auto; border-right: none; border-bottom: 1px solid var(--gray-300); }
}
@media (max-width: 600px) {
    .main-nav { display: none; }
    .main-nav.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--white); border-bottom: 1px solid var(--gray-300); padding: 12px; box-shadow: var(--shadow); z-index: 99; }
    .nav-toggle { display: block; }
    .hero h1 { font-size: 1.7rem; }
    .search-box form { flex-direction: column; }
    .home-stats, .features-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .code-hero-inner { flex-direction: column; }
}