:root {
  --bg-color: #f8f9fa;
  --text-color: #212529;
  --container-bg: #ffffff;
  --button-bg: #ff6b6b;
  --button-text: #ffffff;
  --accent-color: #ff6b6b;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --radio-bg: #e9ecef;
  --radio-checked-bg: #ff6b6b;
  --radio-checked-text: #fff;
}

[data-theme="dark"] {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --container-bg: #1e1e1e;
  --button-bg: #ff8787;
  --button-text: #000000;
  --accent-color: #ff8787;
  --shadow-color: rgba(255, 255, 255, 0.1);
  --radio-bg: #2c2c2c;
  --radio-checked-bg: #ff8787;
  --radio-checked-text: #000;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
  margin: 0;
}

.container {
  text-align: center;
  background-color: var(--container-bg);
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 10px 25px var(--shadow-color);
  transition: background-color 0.3s, box-shadow 0.3s;
  position: relative;
  width: 90%;
  max-width: 400px;
}

h1 {
  margin-bottom: 1.5rem;
  font-size: 2rem;
}

.meal-selector {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.radio-label {
  cursor: pointer;
}

.radio-label input {
  display: none;
}

.radio-custom {
  padding: 0.8rem 1.5rem;
  background-color: var(--radio-bg);
  border-radius: 50px;
  transition: all 0.2s ease;
  font-weight: 600;
  display: inline-block;
}

.radio-label input:checked + .radio-custom {
  background-color: var(--radio-checked-bg);
  color: var(--radio-checked-text);
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.result-area {
  min-height: 120px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 2rem;
  font-size: 1.5rem;
  font-weight: bold;
  border: 2px dashed var(--radio-bg);
  border-radius: 12px;
  padding: 1rem;
}

.result-text {
  animation: popIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  font-size: 2rem;
  color: var(--accent-color);
}

.placeholder {
  font-size: 1rem;
  color: #888;
  font-weight: normal;
}

#recommend-btn {
  padding: 1rem 2rem;
  font-size: 1.1rem;
  cursor: pointer;
  background-color: var(--button-bg);
  color: var(--button-text);
  border: none;
  border-radius: 12px;
  font-weight: bold;
  transition: transform 0.1s, opacity 0.2s;
  width: 100%;
}

#recommend-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

#recommend-btn:active {
  transform: translateY(1px);
}

.theme-toggle {
  position: absolute;
  top: 15px;
  right: 15px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--text-color);
  padding: 5px;
  border-radius: 50%;
  transition: background-color 0.3s;
}

.theme-toggle:hover {
  background-color: var(--shadow-color);
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}