:root {
  --bg-color: #f8f9fa;
  --text-color: #212529;
  --container-bg: #ffffff;
  --ball-bg: #e9ecef;
  --ball-text: #212529;
  --btn-bg: #007bff;
  --btn-text: #ffffff;
  --transition-speed: 0.3s;
}

body.dark-mode {
  --bg-color: #212529;
  --text-color: #f8f9fa;
  --container-bg: #343a40;
  --ball-bg: #495057;
  --ball-text: #f8f9fa;
  --btn-bg: #0d6efd;
  --btn-text: #ffffff;
}

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

.container {
  background-color: var(--container-bg);
  padding: 3rem;
  border-radius: 15px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: background-color var(--transition-speed);
}

.lotto-numbers {
  display: flex;
  gap: 15px;
  justify-content: center;
  margin: 2rem 0;
}

.ball {
  width: 60px;
  height: 60px;
  background-color: var(--ball-bg);
  color: var(--ball-text);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: bold;
  box-shadow: inset 0 -4px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s, background-color var(--transition-speed);
}

.ball.animate {
  animation: pop 0.3s ease-out;
}

@keyframes pop {
  0% { transform: scale(0.5); opacity: 0; }
  70% { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}

.top-nav {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 15px;
  margin-bottom: 1.5rem;
}

#lang-select {
  padding: 5px 10px;
  border-radius: 5px;
  background-color: var(--ball-bg);
  color: var(--text-color);
  border: 1px solid var(--text-color);
  font-family: inherit;
  cursor: pointer;
}

.upload-section {
  margin: 1rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

#image-preview {
  max-width: 300px;
  max-height: 300px;
  border-radius: 15px;
  display: none;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  margin-bottom: 2rem;
}

.file-input-label {
  background-color: var(--ball-bg);
  color: var(--text-color);
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid var(--text-color);
  font-size: 0.9rem;
  transition: opacity 0.2s;
}

.file-input-label:hover {
  opacity: 0.8;
}

#image-upload {
  display: none;
}

.nav-link {
  color: var(--btn-bg);
  text-decoration: none;
  font-weight: bold;
}

.test-area {
  margin: 2rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#webcam-container {
  width: 300px;
  height: 300px;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  margin-bottom: 2rem;
  background-color: var(--ball-bg);
}

#label-container {
  width: 100%;
  max-width: 400px;
}

.prediction-bar {
  margin-bottom: 1rem;
}

.label-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 5px;
  font-weight: 500;
}

.progress-bg {
  background-color: var(--ball-bg);
  height: 10px;
  border-radius: 5px;
  overflow: hidden;
}

.progress-fill {
  background-color: var(--btn-bg);
  height: 100%;
  transition: width 0.3s ease;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.divider {
  border: 0;
  border-top: 1px solid var(--ball-bg);
  margin: 2rem 0;
  width: 100%;
}

.inquiry-section {
  text-align: left;
}

.inquiry-section h3 {
  margin-bottom: 1.5rem;
  color: var(--text-color);
  font-size: 1.25rem;
  text-align: center;
}

.form-group {
  margin-bottom: 1rem;
}

.inquiry-section input,
.inquiry-section textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--ball-bg);
  border-radius: 8px;
  background-color: var(--ball-bg);
  color: var(--ball-text);
  font-family: inherit;
  box-sizing: border-box;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.inquiry-section textarea {
  min-height: 80px;
  resize: vertical;
}

.inquiry-section input:focus,
.inquiry-section textarea:focus {
  outline: none;
  border-color: var(--btn-bg);
  box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

.submit-btn {
  width: 100%;
  background-color: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  padding: 12px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  font-size: 1rem;
  transition: opacity 0.2s;
}

.submit-btn:hover {
  opacity: 0.9;
}

button {
  background-color: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  padding: 12px 24px;
  cursor: pointer;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 500;
  transition: opacity 0.2s, background-color var(--transition-speed);
}

#theme-toggle {
  position: fixed;
  bottom: 20px;
  left: 20px;
  background-color: var(--container-bg);
  color: var(--text-color);
  border: 1px solid var(--text-color);
  font-size: 0.8rem;
  padding: 6px 12px;
  border-radius: 20px;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

button:hover {
  opacity: 0.9;
}
.placeholder-msg { text-align: center; padding: 2rem; color: var(--text-color); opacity: 0.7; }