@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@700&family=Open+Sans:wght@300;400&display=swap');

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: 'Open Sans', sans-serif;
  overflow-x: hidden;
  box-sizing: border-box;
}

*, *:before, *:after {
  box-sizing: inherit;
}

body {
  background-color: #F5F5F5;
  color: #333;
  background-image: linear-gradient(rgba(255,255,255,0.8), rgba(255,255,255,0.8)), url('../assets/images/game/tree_bg.jpg');
  background-size: cover;
  background-attachment: fixed;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1 0 auto;
  width: 100%;
}

/* Header */
header {
  background: linear-gradient(135deg, #1B5E20, #4CAF50);
  padding: 15px 0;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
}

header .logo img {
  max-width: 100px;
  filter: drop-shadow(1px 1px 2px rgba(0, 0, 0, 0.3));
}

header .burger-btn {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

header nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 20px;
  align-items: center;
}

header nav ul li {
  position: relative;
}

header nav ul li a {
  color: #fff;
  text-decoration: none;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  transition: color 0.3s ease;
}

header nav ul li a:hover {
  color: #FF6F00;
}

header nav ul li#userMenu a#userName {
  background-color: rgba(255,255,255,0.2);
  padding: 5px 10px;
  border-radius: 15px;
  color: #fff;
  transition: background-color 0.3s ease, color 0.3s ease;
}

header nav ul li#userMenu a#userName:hover {
  background-color: #FF6F00;
  color: #fff;
}

header nav ul li#userMenu a#userName .dropdown-icon {
  margin-left: 5px;
  transition: transform 0.3s ease, color 0.3s ease;
}

header nav ul li#userMenu:hover a#userName .dropdown-icon {
  transform: rotate(180deg);
  color: #fff;
}

header nav ul li .dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  background: linear-gradient(135deg, #1B5E20, #4CAF50);
  list-style: none;
  padding: 10px 0;
  margin: 0;
  border-radius: 5px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  min-width: 150px;
}

header nav ul li:hover .dropdown-menu {
  display: block;
}

header nav ul li .dropdown-menu li a {
  color: #fff;
  padding: 8px 20px;
  display: block;
  font-size: 0.9rem;
}

header nav ul li .dropdown-menu li a:hover {
  color: #FF6F00;
  background-color: rgba(255,255,255,0.1);
}

header nav ul li.lang-select {
  display: flex;
  gap: 10px;
}

header nav ul li.lang-select a.lang-flag img {
  width: 32px;
  height: 20px;
  border-radius: 3px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

header nav ul li.lang-select a.lang-flag.active img {
  opacity: 1;
  transform: scale(1.1);
}

header nav ul li.lang-select a.lang-flag:not(.active) img {
  opacity: 0.5;
}

header nav ul li.lang-select a.lang-flag:hover img {
  transform: scale(1.2);
}

/* Hero Section */
.hero {
  padding: 60px 0;
  text-align: center;
}

.hero .container {
  max-width: 1536px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero h1 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 2.5rem;
  color: #1B5E20;
  margin-bottom: 20px;
}

.hero h2 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 1.8rem;
  color: #1B5E20;
  margin-bottom: 15px;
}

.hero p {
  font-size: 1.1rem;
  color: #333;
  margin-bottom: 20px;
  font-weight: 300;
}

.hero ul {
  list-style: none;
  padding: 0;
  margin: 0 0 20px 0;
  font-size: 1.1rem;
  color: #333;
  font-weight: 300;
}

.hero ul li {
  margin-bottom: 10px;
}

.hero .cta-btn {
  background-color: #FF6F00;
  color: #fff;
  padding: 12px 30px;
  font-size: 1.2rem;
  text-decoration: none;
  border-radius: 25px;
  transition: transform 0.3s ease, background-color 0.3s ease;
  display: inline-block;
}

.hero .cta-btn:hover {
  background-color: #E65100;
  transform: scale(1.05);
}

.hero .illustration {
  max-width: 200px;
  margin: 0 auto 20px;
  display: block;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Login Form */
.login-container {
  max-width: 400px;
  margin: 0 auto;
  background-color: rgba(255,255,255,0.95);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
}

.form-label {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: #1B5E20;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.form-input {
  border-radius: 5px;
  border: 1px solid #4CAF50;
  padding: 12px;
  font-size: 1rem;
  height: 45px;
  width: 100%;
  box-sizing: border-box;
  font-family: 'Open Sans', sans-serif;
}

.login-btn {
  background: linear-gradient(135deg, #1B5E20, #4CAF50);
  color: #fff;
  padding: 12px 30px;
  font-size: 1.2rem;
  text-decoration: none;
  border-radius: 25px;
  transition: transform 0.3s ease, background 0.3s ease;
  display: inline-block;
  border: none;
  cursor: pointer;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
}

.login-btn:hover {
  background: linear-gradient(135deg, #4CAF50, #1B5E20);
  transform: scale(1.05);
}

/* Team Members */
.team-members {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  justify-content: center;
  margin-bottom: 20px;
}

.team-members .member {
  background-color: rgba(76, 175, 80, 0.1);
  padding: 8px 15px;
  border-radius: 15px;
  font-size: 1.1rem;
  color: #333;
  font-weight: 400;
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Quick Links */
.quick-links {
  padding: 30px 0;
}

.quick-links .container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 15px;
}

.quick-links a {
  background-color: #4CAF50;
  color: #fff;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 20px;
  font-size: 1rem;
  transition: background-color 0.3s ease;
}

.quick-links a:hover {
  background-color: #388E3C;
}

/* Resources Grid */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 20px;
}

/* Card */
.card {
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}

.card-body {
  padding: 15px;
}

.card-title {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  color: #1B5E20;
  margin-bottom: 10px;
}

/* Game Canvas */
.game-canvas {
  width: auto;
  max-width: 100vw; /* Giới hạn chiều rộng bằng viewport */
  height: auto;
  max-height: calc(100vh - 180px);
  margin: 0 auto;
  padding: 0;
  display: block;
  box-sizing: border-box;
  aspect-ratio: 1536 / 1024;
}

.game-canvas canvas {
  width: auto !important;
  max-width: 100vw !important; /* Giới hạn chiều rộng bằng viewport */
  height: auto !important;
  max-height: calc(100vh - 180px) !important;
  margin: 0 auto !important;
  padding: 0;
  display: block !important;
  aspect-ratio: 1536 / 1024 !important;
}

/* Game Page Specific Styles */
.game-page main {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

.game-page .hero {
  padding: 0;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  width: 100%;
  min-height: 100vh;
}

.game-page .hero .container {
  max-width: 1536px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
  box-sizing: border-box;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
}

.game-page .hero h1#roundTitle {
  margin-top: 10px;
  margin-bottom: 10px;
}

.game-page .game-canvas {
  width: auto;
  max-width: 100vw; /* Giới hạn chiều rộng bằng viewport */
  height: auto;
  max-height: calc(100vh - 180px);
  aspect-ratio: 1536 / 1024;
  display: block;
  margin: 0 auto;
  padding: 0;
  box-sizing: border-box;
}

/* Table */
.table {
  background-color: rgba(255,255,255,0.95);
  border-radius: 10px;
  overflow: hidden;
}

.table th, .table td {
  padding: 12px;
  text-align: center;
}

.table th {
  background-color: #4CAF50;
  color: #fff;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
}

/* Footer */
footer {
  flex-shrink: 0;
  background-color: #1B5E20;
  color: #fff;
  padding: 20px 0;
  font-size: 0.9rem;
  font-weight: 400;
  width: 100%;
  text-align: center;
}

.footer-text-mobile {
  display: none;
}

/* Responsive */
@media (min-width: 769px) {
  .game-page .hero .container {
    padding: 0;
  }
}

@media (max-width: 768px) {
  header .container {
    flex-direction: row;
    gap: 10px;
    justify-content: space-between;
  }
  header .burger-btn {
    display: block;
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
  }
  header nav ul {
    display: none;
    flex-direction: column;
    gap: 10px;
    background: linear-gradient(135deg, #1B5E20, #4CAF50);
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    padding: 10px 0;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    z-index: 1000;
  }
  header nav ul.active {
    display: flex !important;
  }
  header nav ul li {
    width: 100%;
    text-align: center;
  }
  header nav ul li#userMenu:hover .dropdown-menu {
    display: none;
  }
  header nav ul li#userMenu .dropdown-menu {
    display: none;
    position: static;
    width: 100%;
    background: linear-gradient(135deg, #4CAF50, #1B5E20);
  }
  header nav ul li#userMenu .dropdown-menu.active {
    display: block !important;
  }
  header nav ul li.lang-select {
    display: flex;
    justify-content: center;
    gap: 20px;
  }
  header nav ul li.lang-select a.lang-flag img {
    width: 40px;
    height: 25px;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
  .hero h2 {
    font-size: 1.5rem;
  }
  .hero p, .hero ul, .hero ul li {
    font-size: 1rem;
  }
  .hero .cta-btn, .hero .login-btn {
    font-size: 1.1rem;
    padding: 10px 25px;
  }
  .hero .illustration {
    max-width: 150px;
  }
  .team-members .member {
    font-size: 1rem;
  }
  .form-input {
    font-size: 0.9rem;
    height: 40px;
  }
  .login-btn {
    font-size: 1.1rem;
    padding: 10px 25px;
  }
  .resources-grid {
    grid-template-columns: 1fr;
  }
  .game-page .hero .container {
    padding: 0;
  }
  .game-page .game-canvas {
    width: auto;
    max-width: 100vw;
    height: calc(75vh - 80px); /* Giảm chiều cao để không quá to */
    max-height: calc(75vh - 80px);
  }
}

@media (max-width: 576px) {
  header .logo img {
    max-width: 80px;
  }
  .hero h1 {
    font-size: 2rem;
  }
  .hero h2 {
    font-size: 1.4rem;
  }
  .hero p, .hero ul, .hero ul li {
    font-size: 0.95rem;
  }
  .quick-links a {
    font-size: 0.95rem;
    padding: 8px 15px;
  }
  .team-members .member {
    font-size: 0.95rem;
  }
  .form-input {
    font-size: 0.85rem;
    height: 38px;
  }
  .hero .cta-btn, .hero .login-btn {
    font-size: 1rem;
    padding: 10px 25px;
  }
  .game-page .game-canvas {
    height: calc(70vh - 80px); /* Giảm thêm để vừa màn hình nhỏ */
    max-height: calc(70vh - 80px);
  }
}

.table-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.table.table-striped {
  width: auto;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .footer-text {
    display: none;
  }
  .footer-text-mobile {
    display: block;
  }
}
/* Admin Page Styles */
.admin-page .card {
  border-radius: 10px;
}

.admin-page .table {
  background-color: #fff;
}

.admin-page .table th, .admin-page .table td {
  vertical-align: middle;
}

.admin-page .btn-primary {
  background-color: #FF6F00;
  border-color: #FF6F00;
}

.admin-page .btn-primary:hover {
  background-color: #E65100;
  border-color: #E65100;
}

.admin-page .btn-danger {
  background-color: #dc3545;
  border-color: #dc3545;
}

.admin-page .btn-danger:hover {
  background-color: #c82333;
  border-color: #c82333;
}

.admin-page .btn-success {
  background-color: #28a745;
  border-color: #28a745;
}

.admin-page .btn-success:hover {
  background-color: #218838;
  border-color: #218838;
}

.admin-page .btn-warning {
  background-color: #ffc107;
  border-color: #ffc107;
}

.admin-page .btn-warning:hover {
  background-color: #e0a800;
  border-color: #e0a800;
}

.admin-page .modal-content {
  border-radius: 10px;
}

.admin-page .form-control, .admin-page .form-select {
  border-radius: 5px;
}

.admin-page .pagination .page-link {
  color: #FF6F00;
}

.admin-page .pagination .page-item.active .page-link {
  background-color: #FF6F00;
  border-color: #FF6F00;
  color: #fff;
}

.admin-page .nav-link {
  color: #333;
  border-radius: 5px;
  margin-bottom: 5px;
}

.admin-page .nav-link.active {
  background-color: #FF6F00;
  color: #fff !important;
}

.admin-page .nav-link:hover {
  background-color: #E65100;
  color: #fff;
}

.admin-page .option-list {
  list-style-type: none;
  padding-left: 0;
}

.admin-page .option-list li {
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}

.admin-page .option-list li input {
  flex-grow: 1;
  margin-right: 10px;
}