/* Modern Spelling App Styles */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Modern color palette */
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --secondary: #f1f5f9;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius: 0.75rem;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, #ffffff 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  padding: 2rem 1rem;
}

/* Container and layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Typography */
h1 {
  font-size: 3rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 2rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 1.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

/* Form elements */
input, textarea, select {
  width: 100%;
  max-width: 320px;
  padding: 0.75rem 1rem;
  margin: 0.5rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: var(--transition);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

textarea {
  min-height: 120px;
  resize: vertical;
  max-width: 500px;
}

/* Buttons */
button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  margin: 0.25rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

button:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

button:active {
  transform: translateY(0);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Button variants */
.btn-secondary {
  background: var(--secondary);
  color: var(--text-primary);
}

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

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

.btn-success:hover {
  background: #059669;
}

.btn-warning {
  background: var(--warning);
}

.btn-warning:hover {
  background: #d97706;
}

.btn-error {
  background: var(--error);
}

.btn-error:hover {
  background: #dc2626;
}

/* Cards and panels */
.card {
  background: var(--bg-primary);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 1rem 0;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.card-header {
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

/* Layout utilities */
.hidden {
  display: none !important;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.gap-4 {
  gap: 1rem;
}

.text-center {
  text-align: center;
}

/* Specific component styles */
#loginPanel {
  max-width: 400px;
  margin: 0 auto;
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

#loginPanel form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

/* Banner */
.banner {
  padding: 1rem;
  text-align: center;
  font-weight: 600;
  color: white;
  border-radius: var(--radius);
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
}

.banner.admin {
  background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
}

.banner.student {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

/* Navigation */
#nav {
  text-align: center;
  margin-bottom: 2rem;
  padding: 1rem;
  background: var(--bg-primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Admin tabs */
#adminTabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  padding: 0.5rem;
  background: var(--bg-secondary);
  border-radius: var(--radius);
}

#adminTabs button {
  flex: 1;
  min-width: fit-content;
  background: transparent;
  color: var(--text-secondary);
  border: none;
  border-radius: calc(var(--radius) - 0.25rem);
  padding: 0.75rem 1rem;
  font-weight: 500;
  transition: var(--transition);
  box-shadow: none;
  cursor: pointer;
}

#adminTabs button:hover {
  background: var(--bg-primary);
  color: var(--text-primary);
  transform: none;
}

#adminTabs button.active {
  background: var(--primary) !important;
  color: white !important;
  box-shadow: var(--shadow);
}

.adminTab {
  background: var(--bg-primary);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.adminTab.hidden {
  display: none !important;
}

/* Game elements */
#wordBox, .word-box, #typingPrompt {
  font-size: 3rem;
  font-weight: 700;
  text-align: center;
  padding: 3rem 2rem;
  margin: 2rem 0;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--secondary) 100%);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  color: var(--primary);
  box-shadow: var(--shadow-lg);
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.student-controls {
  text-align: center;
  margin: 2rem 0;
  padding: 2rem;
  background: var(--bg-primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Lists */
ul {
  list-style: none;
}

li {
  padding: 0.75rem 1rem;
  margin: 0.5rem 0;
  background: var(--bg-secondary);
  border-radius: calc(var(--radius) - 0.25rem);
  border: 1px solid var(--border);
}

/* Toast notifications */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--text-primary);
  color: white;
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  opacity: 0;
  transform: translateY(100%);
  transition: var(--transition);
  z-index: 1000;
  box-shadow: var(--shadow-lg);
  font-weight: 500;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive design */
@media (max-width: 768px) {
  body {
    padding: 1rem 0.5rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  #adminTabs {
    flex-direction: column;
  }
  
  #adminTabs button {
    flex: none;
  }
  
  .card, .adminTab, #loginPanel {
    padding: 1rem;
  }
  
  #wordBox, .word-box, #typingPrompt {
    font-size: 2rem;
    padding: 2rem 1rem;
  }
}