/* ===========================
   QUESTION BANK - MAIN STYLES
   =========================== */

/* Global Resets */
* {
  box-sizing: border-box;
}

body {
  font-family: Georgia, serif;
  background: #f3f3f3;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

.container {
  max-width: 1000px;
  margin: auto;
  padding: 20px;
}

/* ===========================
   HEADER SECTION
   =========================== */

.header {
  text-align: center;
  margin-bottom: 30px;
  padding: 25px;
  background: linear-gradient(135deg, #d84315, #ff8a65);
  color: white;
  border-radius: 15px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.header h1 {
  font-size: 28px;
  margin: 0 0 10px 0;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.header .subtitle {
  font-size: 15px;
  opacity: 0.95;
  margin: 5px 0;
}

/* ===========================
   NAVIGATION
   =========================== */

.back-btn {
  display: inline-block;
  margin-bottom: 20px;
  padding: 10px 20px;
  background: #2e7d32;
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: bold;
  transition: all 0.3s ease;
  box-shadow: 0 3px 8px rgba(0,0,0,0.1);
}

.back-btn:hover {
  background: #1b5e20;
  transform: translateX(-3px);
  box-shadow: 0 5px 12px rgba(0,0,0,0.15);
}

/* ===========================
   LOADING STATE
   =========================== */

.loading {
  text-align: center;
  padding: 40px 20px;
  font-size: 18px;
  color: #666;
}

.loading::before {
  content: '';
  display: inline-block;
  width: 30px;
  height: 30px;
  border: 4px solid #f3f3f3;
  border-top: 4px solid #d84315;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-right: 10px;
  vertical-align: middle;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ===========================
   ERROR STATE
   =========================== */

.error-message {
  text-align: center;
  padding: 40px 20px;
  color: #c62828;
  font-size: 16px;
  background: #ffebee;
  border-radius: 10px;
  margin: 20px 0;
}

/* ===========================
   RESPONSIVE
   =========================== */

@media (max-width: 768px) {
  .container {
    padding: 15px;
  }
  
  .header h1 {
    font-size: 22px;
  }
  
  .header .subtitle {
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .header {
    padding: 20px 15px;
  }
  
  .header h1 {
    font-size: 20px;
  }
  
  .back-btn {
    padding: 8px 16px;
    font-size: 14px;
  }
}