/* Modern UI Framework with Glassmorphism and Gradients */

:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --dark-gradient: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --text-primary: #ffffff;
  --text-secondary: #b8b8b8;
  --accent-color: #667eea;
  --border-radius: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  min-height: 100vh;
  color: var(--text-primary);
  line-height: 1.6;
}

/* Glassmorphism Container */
.glass-container {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  box-shadow: var(--glass-shadow);
  padding: 2rem;
  margin: 1rem;
  transition: var(--transition);
}

.glass-container:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* Modern Buttons */
.btn-modern {
  background: var(--primary-gradient);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-block;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn-modern:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-modern:active {
  transform: translateY(0);
}

.btn-success {
  background: var(--success-gradient);
}

.btn-success:hover {
  box-shadow: 0 8px 25px rgba(79, 172, 254, 0.4);
}

.btn-danger {
  background: var(--secondary-gradient);
}

.btn-danger:hover {
  box-shadow: 0 8px 25px rgba(245, 87, 108, 0.4);
}

/* Modern Inputs */
.input-modern {
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  padding: 15px 20px;
  color: var(--text-primary);
  font-size: 16px;
  transition: var(--transition);
  width: 100%;
  margin-bottom: 1rem;
}

.input-modern:focus {
  outline: none;
  border-color: var(--accent-color);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
}

.input-modern::placeholder {
  color: var(--text-secondary);
}

/* Modern Navigation */
.navbar-modern {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 1rem 2rem;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: bold;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 25px;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--primary-gradient);
  border-radius: 25px;
  opacity: 0;
  transition: var(--transition);
  z-index: -1;
}

.nav-link:hover::before {
  opacity: 0.2;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Responsive Design */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 2rem;
    transition: var(--transition);
    gap: 1rem;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .glass-container {
    margin: 0.5rem;
    padding: 1.5rem;
  }
  
  .chart-row {
    flex-direction: column !important;
  }
  
  .chart-container {
    width: 100% !important;
    margin-bottom: 1rem;
  }
}

/* Update Category Card Styles */
.update-category-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  box-shadow: var(--glass-shadow);
  margin: 2rem auto;
  max-width: 500px;
  transition: var(--transition);
}

.update-category-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.update-category-form {
  padding: 2rem;
}

/* Responsive Update Category Form */
@media (max-width: 768px) {
  .update-category-card {
    margin: 1rem;
    max-width: none;
  }
  
  .update-category-form {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .update-category-card {
    margin: 0.5rem;
  }
  
  .update-category-form {
    padding: 1rem;
  }
}

/* Assignment Card Styles */
.assignment-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  box-shadow: var(--glass-shadow);
  margin: 2rem auto;
  max-width: 500px;
  transition: var(--transition);
}

.assignment-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.assignment-info {
  text-align: center;
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
}

.info-text {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 1rem;
}

.user-highlight {
  background: var(--primary-gradient);
  color: white;
  padding: 1rem;
  border-radius: 8px;
  font-size: 1.2rem;
  font-weight: 600;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.assignment-form {
  padding: 0 2rem 2rem;
}

/* Responsive Assignment Card */
@media (max-width: 768px) {
  .assignment-card {
    margin: 1rem;
    max-width: none;
  }
  
  .assignment-info {
    padding: 1rem;
    margin-bottom: 1.5rem;
  }
  
  .assignment-form {
    padding: 0 1.5rem 1.5rem;
  }
  
  .user-highlight {
    font-size: 1.1rem;
    padding: 0.8rem;
  }
}

@media (max-width: 480px) {
  .assignment-card {
    margin: 0.5rem;
  }
  
  .assignment-info {
    padding: 0.8rem;
    margin-bottom: 1rem;
  }
  
  .assignment-form {
    padding: 0 1rem 1rem;
  }
  
  .info-text {
    font-size: 0.9rem;
  }
  
  .user-highlight {
    font-size: 1rem;
    padding: 0.6rem;
  }
}

/* Update Server Form Styles */
.update-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  box-shadow: var(--glass-shadow);
  margin: 2rem auto;
  max-width: 700px;
  transition: var(--transition);
}

.update-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.update-form {
  padding: 2rem;
}

.password-container {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
  padding: 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
}

.current-password {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.reveal-btn {
  color: var(--accent-color);
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
}

.reveal-btn:hover {
  color: var(--text-primary);
  transform: scale(1.1);
}

/* Responsive Update Form */
@media (max-width: 768px) {
  .update-card {
    margin: 1rem;
  }
  
  .update-form {
    padding: 1.5rem;
  }
  
  .password-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}

@media (max-width: 480px) {
  .update-card {
    margin: 0.5rem;
  }
  
  .update-form {
    padding: 1rem;
  }
}

/* Edit Form Styles */
.edit-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  box-shadow: var(--glass-shadow);
  margin: 2rem auto;
  max-width: 600px;
  transition: var(--transition);
}

.edit-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.edit-form {
  padding: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--accent-color);
  font-size: 0.9rem;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--accent-color);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-select {
  cursor: pointer;
}

.form-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--glass-border);
}

.success-btn {
  background: var(--success-gradient);
  color: white;
}

.success-btn:hover {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  transform: translateY(-2px);
}

/* Responsive Edit Form */
@media (max-width: 768px) {
  .edit-card {
    margin: 1rem;
  }
  
  .edit-form {
    padding: 1.5rem;
  }
  
  .form-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .form-actions .btn-modern {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  .edit-card {
    margin: 0.5rem;
  }
  
  .edit-form {
    padding: 1rem;
  }
  
  .form-group {
    margin-bottom: 1rem;
  }
  
  .form-input,
  .form-textarea,
  .form-select {
    padding: 0.6rem 0.8rem;
    font-size: 0.9rem;
  }
}

/* Modern Cards */
.card-modern {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: var(--transition);
}

.card-modern:hover {
  transform: translateY(-5px);
  box-shadow: var(--glass-shadow);
}

/* Emoji Enhancements */
.emoji-title {
  font-size: 2rem;
  margin-bottom: 1rem;
  text-align: center;
}

.emoji-btn::before {
  margin-right: 0.5rem;
}

/* Loading Animation */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--accent-color);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Modern Tables */
.table-modern {
  width: 100%;
  border-collapse: collapse;
  background: var(--glass-bg);
  border-radius: var(--border-radius);
  overflow: hidden;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

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

.table-modern th {
  background: rgba(255, 255, 255, 0.1);
  font-weight: 600;
}

.table-modern tr:hover {
  background: rgba(255, 255, 255, 0.05);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.p-1 { padding: 1rem; }
.p-2 { padding: 2rem; }

/* Modern Alert Messages */
.alert {
  padding: 1rem;
  border-radius: 12px;
  margin-bottom: 1rem;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
}

.alert-success {
  background: rgba(46, 204, 113, 0.2);
  border-color: rgba(46, 204, 113, 0.3);
  color: #2ecc71;
}

.alert-error {
  background: rgba(231, 76, 60, 0.2);
  border-color: rgba(231, 76, 60, 0.3);
  color: #e74c3c;
}

.alert-info {
  background: rgba(52, 152, 219, 0.2);
  border-color: rgba(52, 152, 219, 0.3);
  color: #3498db;
}

/* View Documentation Card */
.view-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  box-shadow: var(--glass-shadow);
  margin: 2rem auto;
  max-width: 800px;
  transition: var(--transition);
}

.view-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.card-header {
  background: var(--primary-gradient);
  padding: 1.5rem;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  text-align: center;
}

.card-title {
  font-size: 1.8rem;
  font-weight: 600;
  color: white;
  margin: 0;
}

.card-content {
  padding: 2rem;
}

.info-grid {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.info-item {
  background: rgba(255, 255, 255, 0.05);
  padding: 1rem;
  border-radius: 12px;
  border-left: 4px solid var(--accent-color);
}

.info-label {
  font-weight: 600;
  color: var(--accent-color);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.info-value {
  color: var(--text-primary);
  font-size: 1rem;
  line-height: 1.5;
}

.notes-content {
  background: rgba(0, 0, 0, 0.2);
  padding: 1rem;
  border-radius: 8px;
  font-family: 'Courier New', monospace;
  white-space: pre-wrap;
  max-height: 300px;
  overflow-y: auto;
}

.card-actions {
  text-align: center;
  padding-top: 1rem;
  border-top: 1px solid var(--glass-border);
}

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

.secondary-btn:hover {
  background: linear-gradient(135deg, #34495e 0%, #2c3e50 100%);
  transform: translateY(-2px);
}

/* Responsive View Card */
@media (max-width: 768px) {
  .view-card {
    margin: 1rem;
  }
  
  .card-header {
    padding: 1rem;
  }
  
  .card-title {
    font-size: 1.5rem;
  }
  
  .card-content {
    padding: 1.5rem;
  }
  
  .info-item {
    padding: 0.8rem;
  }
  
  .notes-content {
    max-height: 200px;
  }
}

@media (max-width: 480px) {
  .view-card {
    margin: 0.5rem;
  }
  
  .card-header {
    padding: 0.8rem;
  }
  
  .card-title {
    font-size: 1.3rem;
  }
  
  .card-content {
    padding: 1rem;
  }
  
  .info-label {
    font-size: 0.8rem;
  }
  
  .info-value {
    font-size: 0.9rem;
  }
}