body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  padding: 0;
  background: #f9fbfd;
  color: #333;
}

header {
  background: #004e98;
  color: white;
  padding: 20px;
  text-align: center;
  box-shadow: 0 3px 8px rgba(0,0,0,0.2);
}

header h1 {
  margin: 0;
  font-size: 2rem;
}

.balance {
  margin-top: 10px;
  font-size: 1.1rem;
}

main {
  max-width: 900px;
  margin: 30px auto;
  padding: 0 20px;
}

section {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
  margin-bottom: 25px;
}

h2 {
  color: #004e98;
  margin-bottom: 15px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 15px;
}

.stock-item {
  border: 1px solid #ddd;
  border-radius: 10px;
  padding: 15px;
  background: #fafafa;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stock-item strong {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.stock-item button {
  margin-top: 5px;
  padding: 8px 12px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
}

.stock-item button:first-child {
  background: #28a745;
  color: white;
}

.stock-item button:last-child {
  background: #dc3545;
  color: white;
}

#portfolio li, #transaction-log li {
  margin-bottom: 6px;
  font-size: 15px;
}

footer {
  text-align: center;
  font-size: 14px;
  padding: 15px;
  color: #666;
  border-top: 1px solid #ddd;
}

/* 🌗 Toggle Switch */
.dark-toggle {
  margin-top: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 25px;
}

.switch input { display: none; }

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: #ccc;
  transition: .4s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 19px;
  width: 19px;
  left: 4px;
  bottom: 3px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: #2196F3;
}

input:checked + .slider:before {
  transform: translateX(24px);
}

/* 🌙 Dark Mode Theme */
body.dark {
  background-color: #1e1e1e;
  color: #e0e0e0;
}

body.dark header {
  background-color: #111;
  color: white;
}

body.dark section {
  background-color: #2a2a2a;
  box-shadow: 0 0 10px rgba(255,255,255,0.05);
}

body.dark footer {
  background-color: #111;
  border-top-color: #444;
}

body.dark .stock-item {
  background: #333;
  border-color: #444;
}

body.dark .stock-item button:first-child {
  background-color: #28d06f;
}

body.dark .stock-item button:last-child {
  background-color: #f06262;
}

.typewriter {
  overflow: hidden;
  border-right: .15em solid orange;
  white-space: nowrap;
  letter-spacing: .1em;
  animation: typing 3s steps(40, end), blink-caret .75s step-end infinite;
  font-weight: 600;
}

@keyframes typing {
  from { width: 0 }
  to { width: 100% }
}

@keyframes blink-caret {
  from, to { border-color: transparent }
  50% { border-color: orange; }
}

.wavy-text {
  display: inline-block;
  animation: floatText 3s ease-in-out infinite;
}

@keyframes floatText {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1s forwards;
  animation-delay: 0.3s;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.glow {
  color: #0ff;
  text-shadow: 0 0 5px #0ff, 0 0 10px #0ff, 0 0 15px #0ff;
}

.chart-section {
  background: white;
  padding: 20px;
  border-radius: 12px;
  margin-bottom: 25px;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

body.dark .chart-section {
  background: #2a2a2a;
}