/* ====== Global Styles ====== */
:root {
  --primary-color: #277ab9;
  --primary-dark: #1a5d8e;
  --primary-light: #e1f0fa;
  --secondary-color: #b84040;
  --secondary-dark: #9a3535;
  --background-color: #F2F6FA;
  --text-color: #333;
  --text-light: #fff;
  --gray-light: #e9ecef;
  --gray-medium: #adb5bd;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
  --border-radius: 4px;
  --nav-width: 250px;
  --header-height: 70px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  background-color: var(--background-color);
  color: var(--text-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ====== Layout Structure ====== */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-wrapper {
  display: flex;
  flex: 1;
  padding-top: var(--header-height);
}

/* ====== Header Styles ====== */
header {
  background-color: var(--primary-color);
  color: var(--text-light);
  height: var(--header-height);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  padding: 0 1rem;
  transition: var(--transition);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  height: 40px;
  transition: var(--transition);
}

.logo:hover {
  opacity: 0.9;
}

/* ====== Navigation ====== */
nav {
  background-color: var(--primary-color);
  width: var(--nav-width);
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: var(--transition);
  z-index: 900;
  box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
}

nav.active {
  transform: translateX(0);
}

.nav-links {
  display: flex;
  flex-direction: column;
  padding: 1rem 0;
}

.nav-links a {
  color: var(--text-light);
  padding: 0.8rem 1.5rem;
  text-decoration: none;
  font-weight: 500;
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a:focus,
.nav-links a.active {
  background-color: var(--primary-dark);
}

.nav-links a svg {
  margin-right: 0.8rem;
  width: 20px;
  height: 20px;
}

.nav-links .submenu {
  display: none;
  background-color: var(--primary-dark);
  padding-left: 1rem;
}

.nav-links .has-submenu:hover .submenu {
  display: block;
}

/* ====== Main Content ====== */
main {
  flex: 1;
  padding: 2rem;
  width: 100%;
  transition: var(--transition);
}

.content-shift {
  margin-left: var(--nav-width);
}

/* ====== Mobile Menu Button ====== */
.menu-toggle {
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.menu-toggle:hover {
  opacity: 0.8;
}

/* ====== Language Selector ====== */
.language-selector {
  position: relative;
}

.language-selector select {
  background-color: var(--primary-dark);
  color: var(--text-light);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--border-radius);
  padding: 0.4rem 1.8rem 0.4rem 0.8rem;
  font-size: 0.9rem;
  appearance: none;
  cursor: pointer;
}

.language-selector::after {
  content: "▼";
  font-size: 0.6rem;
  color: var(--text-light);
  position: absolute;
  right: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

/* ====== Buttons ====== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.2rem;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  border-radius: var(--border-radius);
  transition: var(--transition);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--text-light);
}

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

.btn-secondary {
  background-color: var(--secondary-color);
  color: var(--text-light);
}

.btn-secondary:hover {
  background-color: var(--secondary-dark);
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
}

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

/* ====== Cards ====== */
.card {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--gray-light);
  background-color: var(--primary-light);
}

.card-body {
  padding: 1.5rem;
}

/* ====== Forms ====== */
.form-group {
  margin-bottom: 1.2rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--gray-medium);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary-color);
  outline: none;
  box-shadow: 0 0 0 3px rgba(39, 122, 185, 0.2);
}

/* ====== Tables ====== */
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 1.5rem;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--gray-light);
}

.table th {
  background-color: var(--primary-light);
  font-weight: 600;
}

.table tr:hover {
  background-color: rgba(0, 0, 0, 0.02);
}

/* ====== Footer ====== */
footer {
  background-color: var(--primary-color);
  color: var(--text-light);
  padding: 2rem 1rem;
  text-align: center;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.social-links {
  display: flex;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.social-links a {
  color: var(--text-light);
  font-size: 1.5rem;
  transition: var(--transition);
}

.social-links a:hover {
  opacity: 0.8;
  transform: translateY(-2px);
}

.copyright {
  margin-top: 1.5rem;
  font-size: 0.9rem;
  opacity: 0.8;
}

/* ====== Utility Classes ====== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--primary-color); }
.bg-light { background-color: var(--gray-light); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

/* ====== Responsive Breakpoints ====== */
@media (min-width: 768px) {
  :root {
    --header-height: 80px;
  }
  
  .logo {
    height: 45px;
  }
  
  nav {
    transform: translateX(0);
    top: var(--header-height);
  }
  
  main {
    margin-left: var(--nav-width);
  }
  
  .menu-toggle {
    display: none;
  }
  
  .nav-links a {
    padding: 0.8rem 1.5rem;
  }
}

@media (min-width: 992px) {
  :root {
    --nav-width: 280px;
  }
  
  .header-content,
  .footer-content,
  main {
    padding-left: 2rem;
    padding-right: 2rem;
  }
  
  .nav-links a {
    padding: 0.8rem 2rem;
  }
  
  .table th,
  .table td {
    padding: 1rem;
  }
}

@media (min-width: 1200px) {
  .header-content,
  .footer-content,
  main {
    max-width: 1200px;
    margin: 0 auto;
  }
}