/* ==========================================================================
   Tema Oficial - Biblioteca Virtual do Instituto Superior de Angola (ISA)
   Identidade Visual: Verde Floresta Profundo (#002118 / #12362c) & Ouro ISA (#feba38)
   ========================================================================== */

:root {
  --isa-dark: #002118;
  --isa-forest: #12362c;
  --isa-green-accent: #2ea879;
  --isa-green-light: #e6fff3;
  --isa-green-mint: #caf1e0;
  --isa-gold: #feba38;
  --isa-gold-dark: #d49520;
  --isa-gold-light: #ffdeab;
  --isa-bg: #f6f8f7;
  --isa-card-bg: #ffffff;
  --isa-text-primary: #002118;
  --isa-text-secondary: #426559;
  --isa-text-muted: #6b8f82;
  --isa-border: #e2ece7;
  --isa-shadow: 0 4px 16px rgba(0, 33, 24, 0.07);
  --isa-shadow-hover: 0 12px 28px rgba(0, 33, 24, 0.14);
}

/* Base & Tipografia */
body {
  background-color: var(--isa-bg) !important;
  color: var(--isa-text-primary) !important;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--isa-dark) !important;
  font-weight: 700 !important;
  letter-spacing: -0.02em;
}

a {
  color: var(--isa-forest) !important;
  transition: all 0.2s ease-in-out;
}

a:hover, a:focus {
  color: var(--isa-gold-dark) !important;
  text-decoration: none !important;
}

/* Barra de Navegação Superior (Header) */
.navbar-default {
  background: linear-gradient(135deg, #002118 0%, #12362c 100%) !important;
  border: none !important;
  border-bottom: 3px solid var(--isa-gold) !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25) !important;
  padding: 6px 0 !important;
  margin-bottom: 30px !important;
}

/* Brand & Logo */
.navbar-brand.isa-brand {
  display: flex !important;
  align-items: center !important;
  gap: 12px !important;
  padding: 8px 15px !important;
  height: auto !important;
}

.isa-logo-img {
  height: 38px !important;
  width: auto !important;
  object-fit: contain;
  filter: brightness(1.05);
}

.isa-brand-text-wrapper {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.isa-brand-title {
  font-size: 1.15rem !important;
  font-weight: 800 !important;
  color: #ffffff !important;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.isa-brand-subtitle {
  font-size: 0.72rem !important;
  font-weight: 600 !important;
  color: var(--isa-gold) !important;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 2px;
}

/* Links do Menu */
.navbar-default .navbar-nav > li > a {
  color: #e6fff3 !important;
  font-weight: 600 !important;
  font-size: 0.92rem !important;
  padding: 16px 14px !important;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.navbar-default .navbar-nav > li > a:hover,
.navbar-default .navbar-nav > li > a:focus,
.navbar-default .navbar-nav > .active > a {
  background: rgba(254, 186, 56, 0.15) !important;
  color: var(--isa-gold) !important;
}

.navbar-default .navbar-nav > li > a .glyphicon {
  color: var(--isa-gold) !important;
  margin-right: 4px;
}

/* Barra de Pesquisa na Navbar */
.navbar-form .input-group {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  border-radius: 24px;
  overflow: hidden;
}

.navbar-form .form-control {
  background: rgba(255, 255, 255, 0.95) !important;
  border: 1px solid rgba(255, 255, 255, 0.2) !important;
  border-right: none !important;
  border-radius: 24px 0 0 24px !important;
  color: var(--isa-dark) !important;
  font-size: 0.9rem;
  padding: 6px 16px;
}

.navbar-form .form-control:focus {
  background: #ffffff !important;
  outline: none;
  box-shadow: none !important;
}

.navbar-form .btn-default {
  background: var(--isa-gold) !important;
  border: 1px solid var(--isa-gold) !important;
  color: var(--isa-dark) !important;
  font-weight: 700 !important;
  border-radius: 0 24px 24px 0 !important;
  padding: 6px 16px;
  transition: background 0.2s;
}

.navbar-form .btn-default:hover {
  background: var(--isa-gold-dark) !important;
  border-color: var(--isa-gold-dark) !important;
}

/* Dropdown Menu */
.dropdown-menu {
  background-color: #ffffff !important;
  border: 1px solid var(--isa-border) !important;
  border-radius: 12px !important;
  box-shadow: 0 10px 30px rgba(0, 33, 24, 0.15) !important;
  padding: 8px !important;
}

.dropdown-menu > li > a {
  color: var(--isa-dark) !important;
  font-weight: 600 !important;
  border-radius: 6px;
  padding: 8px 16px !important;
}

.dropdown-menu > li > a:hover {
  background-color: var(--isa-green-light) !important;
  color: var(--isa-forest) !important;
}

/* Toggle Mobile */
.navbar-default .navbar-toggle {
  border-color: var(--isa-gold) !important;
  border-radius: 8px;
}

.navbar-default .navbar-toggle:hover,
.navbar-default .navbar-toggle:focus {
  background-color: rgba(254, 186, 56, 0.2) !important;
}

.navbar-default .navbar-toggle .icon-bar {
  background-color: var(--isa-gold) !important;
}

/* Botões Gerais */
.btn-primary {
  background-color: var(--isa-forest) !important;
  border-color: var(--isa-forest) !important;
  color: #ffffff !important;
  font-weight: 600 !important;
  border-radius: 8px !important;
  transition: all 0.2s ease !important;
}

.btn-primary:hover, .btn-primary:focus {
  background-color: var(--isa-dark) !important;
  border-color: var(--isa-dark) !important;
  box-shadow: 0 4px 12px rgba(0, 33, 24, 0.2) !important;
}

.btn-default {
  background-color: #ffffff !important;
  border-color: var(--isa-border) !important;
  color: var(--isa-forest) !important;
  font-weight: 600 !important;
  border-radius: 8px !important;
  transition: all 0.2s ease !important;
}

.btn-default:hover, .btn-default:focus {
  background-color: var(--isa-green-light) !important;
  border-color: var(--isa-forest) !important;
  color: var(--isa-dark) !important;
}

/* Cartões de Livros (Grid & Covers) */
.container-fluid .book {
  background: var(--isa-card-bg) !important;
  border: 1px solid var(--isa-border) !important;
  border-radius: 14px !important;
  padding: 14px !important;
  margin-bottom: 24px !important;
  box-shadow: var(--isa-shadow) !important;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

.container-fluid .book:hover {
  transform: translateY(-5px) !important;
  box-shadow: var(--isa-shadow-hover) !important;
  border-color: var(--isa-green-accent) !important;
}

.container-fluid .book .cover {
  border-radius: 10px !important;
  overflow: hidden !important;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.12) !important;
}

.container-fluid .book .cover img {
  border-radius: 10px !important;
  transition: transform 0.3s ease;
}

.container-fluid .book:hover .cover img {
  transform: scale(1.03);
}

.container-fluid .book .meta .title {
  color: var(--isa-dark) !important;
  font-weight: 700 !important;
  font-size: 0.98rem !important;
  line-height: 1.3 !important;
  margin-top: 8px !important;
}

.container-fluid .book .meta .author {
  color: var(--isa-text-secondary) !important;
  font-size: 0.88rem !important;
  font-weight: 500 !important;
}

.container-fluid .book .meta .author a {
  color: var(--isa-text-secondary) !important;
}

.container-fluid .book .meta .author a:hover {
  color: var(--isa-gold-dark) !important;
}

/* Badges e Tags */
.badge, .label-default {
  background-color: var(--isa-forest) !important;
  color: #ffffff !important;
  border-radius: 12px !important;
  font-weight: 600 !important;
  padding: 4px 8px !important;
}

.badge-gold, .label-gold {
  background-color: var(--isa-gold) !important;
  color: var(--isa-dark) !important;
}

/* Paginação */
.pagination > li > a, .pagination > li > span {
  color: var(--isa-forest) !important;
  border-color: var(--isa-border) !important;
  border-radius: 6px !important;
  margin: 0 2px !important;
  font-weight: 600 !important;
}

.pagination > .active > a, 
.pagination > .active > span, 
.pagination > .active > a:hover, 
.pagination > .active > span:hover {
  background-color: var(--isa-forest) !important;
  border-color: var(--isa-forest) !important;
  color: #ffffff !important;
}

.pagination > li > a:hover {
  background-color: var(--isa-green-light) !important;
}

/* Sidebar e Menus Laterais */
.sidebar {
  background: #ffffff !important;
  border-radius: 12px !important;
  border: 1px solid var(--isa-border) !important;
  padding: 16px !important;
  box-shadow: var(--isa-shadow) !important;
}

.sidebar .nav > li > a {
  color: var(--isa-dark) !important;
  font-weight: 600 !important;
  border-radius: 8px !important;
  margin-bottom: 2px !important;
  padding: 10px 14px !important;
}

.sidebar .nav > li > a:hover,
.sidebar .nav > li.active > a {
  background-color: var(--isa-green-light) !important;
  color: var(--isa-forest) !important;
}

.sidebar .nav > li > a .glyphicon {
  color: var(--isa-forest) !important;
  margin-right: 8px;
}

/* Caixa de Login Estilizada para o ISA */
.isa-login-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-top: 30px;
  padding-bottom: 50px;
}

.isa-login-card {
  background: #ffffff !important;
  border: 1px solid var(--isa-border) !important;
  border-top: 5px solid var(--isa-forest) !important;
  border-radius: 16px !important;
  box-shadow: 0 12px 36px rgba(0, 33, 24, 0.1) !important;
  padding: 36px 32px !important;
  max-width: 480px;
  width: 100%;
}

.isa-login-header {
  text-align: center;
  margin-bottom: 28px;
}

.isa-login-logo {
  max-height: 70px;
  margin-bottom: 16px;
  object-fit: contain;
}

.isa-login-title {
  font-size: 1.35rem !important;
  font-weight: 800 !important;
  color: var(--isa-dark) !important;
  margin: 0 0 6px 0 !important;
  letter-spacing: -0.02em;
}

.isa-login-subtitle {
  font-size: 0.85rem !important;
  font-weight: 600 !important;
  color: var(--isa-text-secondary) !important;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 !important;
}

.isa-login-card .form-control {
  border-radius: 8px !important;
  border: 1px solid #cfded6 !important;
  padding: 10px 14px !important;
  height: auto !important;
  font-size: 0.95rem !important;
}

.isa-login-card .form-control:focus {
  border-color: var(--isa-forest) !important;
  box-shadow: 0 0 0 3px rgba(18, 54, 44, 0.15) !important;
}

.isa-login-card .btn-submit-isa {
  background: linear-gradient(135deg, #feba38 0%, #e5a72e 100%) !important;
  border: none !important;
  color: var(--isa-dark) !important;
  font-size: 1.05rem !important;
  font-weight: 800 !important;
  padding: 12px 24px !important;
  border-radius: 10px !important;
  width: 100% !important;
  margin-top: 14px !important;
  box-shadow: 0 4px 14px rgba(254, 186, 56, 0.35) !important;
  transition: all 0.2s ease !important;
}

.isa-login-card .btn-submit-isa:hover {
  background: linear-gradient(135deg, #e5a72e 0%, #c98e1d 100%) !important;
  box-shadow: 0 6px 18px rgba(254, 186, 56, 0.45) !important;
  transform: translateY(-1px);
}

.isa-login-footer {
  text-align: center;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--isa-border);
  font-size: 0.8rem;
  color: var(--isa-text-muted);
}

/* Modais & Detalhes do Livro */
.modal-content {
  border-radius: 16px !important;
  border: 1px solid var(--isa-border) !important;
  box-shadow: 0 16px 48px rgba(0, 33, 24, 0.2) !important;
  overflow: hidden;
}

.modal-header {
  background: linear-gradient(135deg, #002118 0%, #12362c 100%) !important;
  color: #ffffff !important;
  border-bottom: 2px solid var(--isa-gold) !important;
  padding: 16px 20px !important;
}

.modal-header h4 {
  color: #ffffff !important;
}

.modal-header .close {
  color: var(--isa-gold) !important;
  opacity: 0.85;
}

.modal-header .close:hover {
  opacity: 1;
}

/* Footer institucional */
.isa-portal-footer {
  margin-top: 60px;
  padding: 24px 0;
  border-top: 1px solid var(--isa-border);
  background-color: #ffffff;
  color: var(--isa-text-muted);
  font-size: 0.85rem;
  text-align: center;
}

.isa-portal-footer a {
  color: var(--isa-forest) !important;
  font-weight: 600;
}