/* ==========================================================================
   TECH237 BRAND DESIGN SYSTEM
   "Là où les idées deviennent des projets"
   Color Palette extracted directly from the official Tech237 logo:
   - Tech Deep Navy:   #0B2559
   - Tech Darker Navy: #06152D
   - Tech Green 237:   #00A859 (Emerald Tech)
   - Tech Pixel Blue:  #0284C7
   - Cameroon Flag:    #007A3D (Green), #CE1126 (Red), #F59E0B (Yellow)
   - Slate & Light:    #F8FAFC, #FFFFFF, #E2E8F0
   ========================================================================== */

:root {
  --tech-navy: #0B2559;
  --tech-navy-hover: #071c44;
  --tech-navy-dark: #06152D;
  --tech-navy-light: #163674;
  
  --tech-green: #00A859;
  --tech-green-hover: #008f4c;
  --tech-green-light: #e6f7ef;
  --tech-green-glow: rgba(0, 168, 89, 0.25);

  --tech-cyan: #0284C7;
  --tech-cyan-light: #e0f2fe;

  --cam-green: #007A3D;
  --cam-red: #CE1126;
  --cam-yellow: #F59E0B;

  --tech-surface: #ffffff;
  --tech-bg: #f8fafc;
  --tech-border: #e2e8f0;
  --tech-text: #0f172a;
  --tech-muted: #64748b;

  /* Global Brand Color Replacement: replace rgba(var(--bs-danger-rgb) with var(--tech-green) */
  --bs-danger: var(--tech-green) !important;
  --bs-danger-rgb: 0, 168, 89 !important;
  --bs-danger-text-emphasis: #007A3D !important;
  --bs-danger-bg-subtle: #e6f7ef !important;
  --bs-danger-border-subtle: #a3cfbb !important;

  /* Backward Compatibility mapping so existing classes inherit the new brand */
  --melty-red: #00A859;
  --melty-red-hover: #008f4c;
  --melty-dark: #0B2559;
  --melty-darker: #06152D;
  --melty-surface: #0B2559;
  --melty-border: rgba(255, 255, 255, 0.12);
  --melty-light-bg: #f8fafc;
  --melty-card-bg: #ffffff;
  --melty-text: #0f172a;
  --melty-muted: #64748b;
}

body.melty-body, body.tech237-body {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--tech-bg);
  color: var(--tech-text);
  overflow-x: hidden;
  letter-spacing: -0.01em;
}

/* --------------------------------------------------------------------------
   BRAND BUTTONS & BADGES
   -------------------------------------------------------------------------- */
/* Global Bootstrap danger replacement with Tech237 Emerald Green */
.bg-danger {
  background-color: var(--tech-green) !important;
}
.btn-danger {
  background-color: var(--tech-green) !important;
  border-color: var(--tech-green) !important;
  color: #ffffff !important;
}
.btn-danger:hover {
  background-color: var(--tech-green-hover) !important;
  border-color: var(--tech-green-hover) !important;
  color: #ffffff !important;
}
.text-danger {
  color: var(--tech-green) !important;
}
.border-danger {
  border-color: var(--tech-green) !important;
}
.btn-outline-danger {
  color: var(--tech-green) !important;
  border-color: var(--tech-green) !important;
}
.btn-outline-danger:hover {
  background-color: var(--tech-green) !important;
  border-color: var(--tech-green) !important;
  color: #ffffff !important;
}

.btn-melty, .btn-tech-green {
  background-color: var(--tech-green) !important;
  border-color: var(--tech-green) !important;
  color: #ffffff !important;
  font-weight: 700;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 14px var(--tech-green-glow);
}

.btn-melty:hover, .btn-tech-green:hover {
  background-color: var(--tech-green-hover) !important;
  border-color: var(--tech-green-hover) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 168, 89, 0.35);
}

.btn-tech-navy {
  background-color: var(--tech-navy) !important;
  border-color: var(--tech-navy) !important;
  color: #ffffff !important;
  font-weight: 700;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px rgba(11, 37, 89, 0.2);
}

.btn-tech-navy:hover {
  background-color: var(--tech-navy-hover) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(11, 37, 89, 0.3);
}

.btn-tech-outline-green {
  background-color: transparent !important;
  border: 2px solid var(--tech-green) !important;
  color: var(--tech-green) !important;
  font-weight: 700;
  transition: all 0.2s ease;
}

.btn-tech-outline-green:hover {
  background-color: var(--tech-green) !important;
  color: #ffffff !important;
  transform: translateY(-2px);
}

.btn-tech-outline-navy {
  background-color: transparent !important;
  border: 2px solid var(--tech-navy) !important;
  color: var(--tech-navy) !important;
  font-weight: 700;
  transition: all 0.2s ease;
}

.btn-tech-outline-navy:hover {
  background-color: var(--tech-navy) !important;
  color: #ffffff !important;
  transform: translateY(-2px);
}

.badge-tech-green {
  background-color: var(--tech-green-light);
  color: var(--tech-green);
  border: 1px solid rgba(0, 168, 89, 0.25);
  font-weight: 700;
}

.badge-tech-navy {
  background-color: #e8eef8;
  color: var(--tech-navy);
  border: 1px solid rgba(11, 37, 89, 0.2);
  font-weight: 700;
}

.badge-cameroon {
  background: linear-gradient(90deg, #007A3D 0%, #CE1126 50%, #F59E0B 100%);
  color: #ffffff;
  font-weight: 800;
  text-shadow: 0 1px 2px rgba(0,0,0,0.4);
}

/* --------------------------------------------------------------------------
   TOP BAR & TICKER
   -------------------------------------------------------------------------- */
.top-nav-bar {
  background: #ffffff;
  border-bottom: 1px solid var(--tech-border);
}

.ticker-bar {
  background: linear-gradient(90deg, #06152D 0%, #0B2559 100%);
  color: #fff;
  font-size: 0.82rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.ticker-badge {
  background-color: var(--tech-green);
  color: #fff;
  font-weight: 800;
  padding: 0.25rem 0.65rem;
  font-size: 0.72rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  border-radius: 4px;
}

/* --------------------------------------------------------------------------
   MAIN NAVIGATION
   -------------------------------------------------------------------------- */
.tech237-main-nav, .melty-main-nav {
  background-color: #ffffff !important;
  border-bottom: 2px solid #e8eef8;
  box-shadow: 0 4px 20px rgba(11, 37, 89, 0.06);
  position: sticky;
  top: 0;
  z-index: 1030;
  transition: all 0.3s ease;
}

.nav-item-link {
  color: var(--tech-navy) !important;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.5rem 0.75rem !important;
  text-decoration: none;
  transition: all 0.2s ease;
  position: relative;
  display: inline-flex;
  align-items: center;
  border-radius: 8px;
}

.nav-item-link:hover {
  color: var(--tech-green) !important;
  background-color: var(--tech-green-light);
}

.nav-item-link.active {
  color: var(--tech-green) !important;
  background-color: var(--tech-green-light);
  font-weight: 700;
}

.nav-item-link.active::after {
  content: '';
  position: absolute;
  bottom: -9px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background-color: var(--tech-green);
  border-radius: 3px;
}

/* --------------------------------------------------------------------------
   SUB-TOPICS / TRENDING BAR
   -------------------------------------------------------------------------- */
.sub-topics-bar {
  background-color: #ffffff;
  border-bottom: 1px solid var(--tech-border);
  padding: 0.5rem 0;
  white-space: nowrap;
  overflow-x: auto;
}

.topic-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.32rem 0.85rem;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--tech-navy);
  background-color: #f1f5f9;
  text-decoration: none;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.topic-pill:hover,
.topic-pill.active {
  background-color: var(--tech-navy);
  color: #fff;
  border-color: var(--tech-navy);
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   CARDS & HOVERS
   -------------------------------------------------------------------------- */
.tech237-card, .article-card {
  background: #ffffff;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--tech-border);
  box-shadow: 0 4px 16px rgba(11, 37, 89, 0.04);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.tech237-card:hover, .article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 32px rgba(11, 37, 89, 0.1) !important;
  border-color: rgba(0, 168, 89, 0.4) !important;
}

.article-card-img-wrap {
  position: relative;
  overflow: hidden;
  padding-top: 56.25%;
}

.article-card-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.article-card:hover .article-card-img {
  transform: scale(1.05);
}

.article-card-body {
  padding: 1.35rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--tech-navy);
  margin-bottom: 0.65rem;
  text-decoration: none;
  transition: color 0.2s ease;
}

.article-card:hover .article-card-title {
  color: var(--tech-green);
}

/* Hero Section */
.hero-main-card {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  height: 500px;
  background-color: var(--tech-navy-dark);
  box-shadow: 0 14px 34px rgba(11, 37, 89, 0.2);
  transition: transform 0.3s ease;
}

.hero-main-card:hover {
  transform: translateY(-4px);
}

.hero-main-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.hero-main-card:hover .hero-main-img {
  transform: scale(1.04);
}

.hero-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2.25rem;
  background: linear-gradient(180deg, transparent 0%, rgba(6, 21, 45, 0.7) 40%, rgba(6, 21, 45, 0.98) 95%);
  color: #fff;
}

.hero-side-card {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  height: 238px;
  background-color: var(--tech-navy-dark);
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 24px rgba(11, 37, 89, 0.12);
  transition: transform 0.25s ease;
}

.hero-side-card:hover {
  transform: translateY(-3px);
}

.hero-side-card .hero-overlay {
  padding: 1.35rem;
}

/* Score Badge (/20) */
.score-badge-20 {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--tech-green) 0%, #007A3D 100%);
  color: #fff;
  font-weight: 900;
  border-radius: 12px;
  padding: 0.45rem 0.85rem;
  box-shadow: 0 4px 12px var(--tech-green-glow);
  font-size: 1.1rem;
}

/* --------------------------------------------------------------------------
   FOOTER (TECH237 BRANDED)
   -------------------------------------------------------------------------- */
.tech237-footer, .melty-footer {
  background: linear-gradient(180deg, #0B2559 0%, #06152D 100%) !important;
  color: rgba(255, 255, 255, 0.75);
  padding: 4rem 0 2.5rem;
  border-top: 4px solid var(--tech-green) !important;
  margin-top: 5rem;
}

.tech237-footer h5, .tech237-footer h6,
.melty-footer h5, .melty-footer h6 {
  color: #ffffff !important;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.tech237-footer a, .melty-footer a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  transition: all 0.2s ease;
}

.tech237-footer a:hover, .melty-footer a:hover {
  color: var(--tech-green) !important;
  padding-left: 2px;
}

/* --------------------------------------------------------------------------
   AD BANNERS
   -------------------------------------------------------------------------- */
.ad-container {
  background-color: #f8fafc;
  border: 1px dashed var(--tech-border);
  border-radius: 12px;
  padding: 0.75rem;
  text-align: center;
  position: relative;
  margin: 1.5rem 0;
  overflow: hidden;
}

.ad-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #94a3b8;
  margin-bottom: 0.35rem;
  display: block;
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   SEARCH MODAL
   -------------------------------------------------------------------------- */
.fullscreen-search-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(6, 21, 45, 0.97);
  backdrop-filter: blur(14px);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  padding: 2.5rem 1.5rem;
  overflow-y: auto;
}

.search-input-lg {
  background: transparent;
  border: none;
  border-bottom: 2px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 2.2rem;
  font-weight: 700;
  width: 100%;
  padding: 0.85rem 0;
  outline: none;
  transition: border-color 0.3s ease;
}

.search-input-lg:focus {
  border-color: var(--tech-green);
}

.search-input-lg::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

/* --------------------------------------------------------------------------
   GLOBAL SMOOTH IMAGE HOVER ZOOM EFFECT
   -------------------------------------------------------------------------- */
.card .card-img-top,
.card img.object-fit-cover,
.article-card-hover img,
.tech237-hover-lift img,
.overflow-hidden > img:not(.no-zoom) {
  transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.card:hover .card-img-top,
.card:hover img.object-fit-cover,
.article-card-hover:hover img,
.tech237-hover-lift:hover img,
.overflow-hidden:hover > img:not(.no-zoom) {
  transform: scale(1.05);
}

.card-img-wrapper,
.card .position-relative.overflow-hidden {
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   SELECT2 BOOTSTRAP 5 HARMONIZATION & STYLING
   -------------------------------------------------------------------------- */
.select2-container {
  width: 100% !important;
  max-width: 100%;
}

.select2-container--default .select2-selection--single {
  height: 42px;
  padding: 6px 12px;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid #dee2e6;
  border-radius: 0.5rem;
  background-color: #ffffff;
  display: flex;
  align-items: center;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.select2-container--default .select2-selection--single .select2-selection__rendered {
  padding-left: 0;
  padding-right: 24px;
  color: #212529;
  line-height: normal;
  display: flex;
  align-items: center;
}

.select2-container--default .select2-selection--single .select2-selection__placeholder {
  color: #6c757d;
}

.select2-container--default .select2-selection--single .select2-selection__arrow {
  height: 100%;
  right: 10px;
  top: 0;
  display: flex;
  align-items: center;
}

.select2-container--default.select2-container--open .select2-selection--single,
.select2-container--default .select2-selection--single:focus {
  border-color: #00A859;
  outline: 0;
  box-shadow: 0 0 0 0.25rem rgba(0, 168, 89, 0.2);
}

/* Sm Size */
.select2-sm + .select2-container .select2-selection--single,
.select2-container--sm .select2-selection--single {
  height: 34px !important;
  padding: 4px 10px !important;
  font-size: 0.85rem !important;
  border-radius: 0.375rem !important;
}

/* Pill style for filters */
.select2-pill + .select2-container .select2-selection--single,
.select2-container--pill .select2-selection--single {
  border-radius: 50rem !important;
  padding-left: 16px !important;
  padding-right: 16px !important;
  background-color: #f8fafc;
}

/* Dropdown */
.select2-dropdown {
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 0.5rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  z-index: 1065 !important;
  overflow: hidden;
}

.select2-search--dropdown {
  padding: 8px;
  background-color: #f8fafc;
  border-bottom: 1px solid #e9ecef;
}

.select2-search--dropdown .select2-search__field {
  border: 1px solid #ced4da;
  border-radius: 0.375rem;
  padding: 6px 12px;
  font-size: 0.875rem;
  outline: none;
}

.select2-search--dropdown .select2-search__field:focus {
  border-color: #00A859;
  box-shadow: 0 0 0 0.2rem rgba(0, 168, 89, 0.2);
}

.select2-results__option {
  padding: 8px 14px;
  font-size: 0.9rem;
}

.select2-container--default .select2-results__option--highlighted.select2-results__option--selectable {
  background-color: #00A859;
  color: #ffffff;
}

.select2-container--default .select2-results__option--selected {
  background-color: #e8f5e9;
  color: #008746;
  font-weight: 600;
}

/* ==========================================================================
   DARK MODE (MODE SOMBRE) THEME SYSTEM
   ========================================================================== */
html.dark-mode,
html[data-bs-theme="dark"] {
  --tech-surface: #111827;
  --tech-bg: #0b1120;
  --tech-border: #1e293b;
  --tech-text: #f1f5f9;
  --tech-muted: #94a3b8;
  --tech-green-light: rgba(0, 168, 89, 0.16);
  --melty-light-bg: #0b1120;
  --melty-card-bg: #111827;
  --melty-text: #f1f5f9;
  --melty-muted: #94a3b8;
}

html.dark-mode body,
html.dark-mode body.melty-body,
html.dark-mode body.tech237-body,
html.dark-mode .melty-wrapper {
  background-color: #0b1120 !important;
  color: #f1f5f9 !important;
}

html.dark-mode .bg-white {
  background-color: #111827 !important;
  color: #f1f5f9;
}

html.dark-mode .bg-light {
  background-color: #0f172a !important;
  color: #e2e8f0;
}

html.dark-mode .top-nav-bar,
html.dark-mode .melty-main-nav,
html.dark-mode .tech237-main-nav,
html.dark-mode .mobile-drawer-panel {
  background-color: #0f172a !important;
  border-color: #1e293b !important;
}

html.dark-mode .sub-topics-bar {
  background-color: #0b1120 !important;
  border-color: #1e293b !important;
}

html.dark-mode .topic-pill {
  background-color: #1e293b;
  color: #e2e8f0;
  border-color: #334155;
}

html.dark-mode .nav-item-link,
html.dark-mode .social-top-link {
  color: #e2e8f0 !important;
}

html.dark-mode .nav-item-link:hover,
html.dark-mode .nav-item-link.active {
  color: var(--tech-green) !important;
  background-color: rgba(0, 168, 89, 0.16) !important;
}

html.dark-mode .card:not(.text-white) {
  background-color: #111827;
  border-color: #1e293b;
  color: #f1f5f9;
}

html.dark-mode .text-dark:not(.badge):not(.btn) {
  color: #f1f5f9 !important;
}

html.dark-mode .text-muted,
html.dark-mode .text-secondary {
  color: #94a3b8 !important;
}

html.dark-mode .border,
html.dark-mode .border-top,
html.dark-mode .border-bottom,
html.dark-mode .border-start,
html.dark-mode .border-end {
  border-color: #1e293b !important;
}

html.dark-mode .dropdown-menu {
  background-color: #111827 !important;
  border: 1px solid #1e293b !important;
}

html.dark-mode .dropdown-item {
  color: #e2e8f0 !important;
}

html.dark-mode .dropdown-item:hover,
html.dark-mode .dropdown-item:focus {
  background-color: #1e293b !important;
  color: #ffffff !important;
}

html.dark-mode .list-group-item {
  background-color: transparent !important;
  color: #e2e8f0 !important;
  border-color: #1e293b !important;
}

html.dark-mode .form-control,
html.dark-mode .form-select {
  background-color: #0f172a !important;
  border-color: #334155 !important;
  color: #f1f5f9 !important;
}

html.dark-mode .form-control::placeholder {
  color: #64748b !important;
}

html.dark-mode .btn-light,
html.dark-mode .btn-white {
  background-color: #1e293b !important;
  border-color: #334155 !important;
  color: #f1f5f9 !important;
}

html.dark-mode .btn-outline-dark {
  color: #e2e8f0 !important;
  border-color: #475569 !important;
}

html.dark-mode .btn-outline-dark:hover {
  background-color: #334155 !important;
  color: #ffffff !important;
}

html.dark-mode .article-body-content,
html.dark-mode .article-content,
html.dark-mode .poc-content {
  color: #e2e8f0 !important;
}

html.dark-mode .article-body-content h1,
html.dark-mode .article-body-content h2,
html.dark-mode .article-body-content h3,
html.dark-mode .article-body-content h4 {
  color: #f8fafc !important;
}

html.dark-mode .en-bref-box {
  background-color: rgba(155, 225, 6, 0.08) !important;
  color: #f1f5f9 !important;
}

html.dark-mode .audio-narrator-card {
  background-color: #1e293b !important;
  border-color: #334155 !important;
}

html.dark-mode .modal-content {
  background-color: #111827 !important;
  border-color: #1e293b !important;
  color: #f1f5f9 !important;
}

html.dark-mode .table {
  --bs-table-bg: #111827;
  --bs-table-color: #e2e8f0;
  --bs-table-border-color: #1e293b;
  color: #e2e8f0 !important;
}

html.dark-mode .select2-container--default .select2-selection--single {
  background-color: #0f172a !important;
  border-color: #334155 !important;
}

html.dark-mode .select2-container--default .select2-selection--single .select2-selection__rendered {
  color: #f1f5f9 !important;
}

html.dark-mode .select2-dropdown,
html.dark-mode .select2-search--dropdown {
  background-color: #111827 !important;
  border-color: #334155 !important;
}

html.dark-mode .select2-search--dropdown .select2-search__field {
  background-color: #0f172a !important;
  border-color: #334155 !important;
  color: #f1f5f9 !important;
}

html.dark-mode .select2-results__option {
  color: #e2e8f0;
}