:root {
  --background-color: #121212;
  --surface-color: #1e1e1e;
  --primary-color: #3b82f6;
  --primary-hover-color: #2563eb;
  --secondary-color: #4f4f4f;
  --text-color: #e0e0e0;
  --text-muted-color: #a0a0a0;
  --success-color: #22c55e;
  --error-color: #ef4444;
  --border-color: #333;
  --border-radius: 8px;
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
}

#root {
  max-width: 800px;
  margin: 2rem auto;
  padding: 1rem;
}

h1, h2, h3 {
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

h1 {
  font-size: 2.5rem;
  text-align: center;
}

h2 {
  font-size: 2rem;
  text-align: center;
}

h3 {
  font-size: 1.5rem;
  color: var(--text-color);
  margin-bottom: 0.75rem;
}

button, .button-label {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 0.75rem 1.25rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  transition: background-color 0.2s ease-in-out;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-align: center;
}

button:hover, .button-label:hover {
  background-color: var(--primary-hover-color);
}

button.secondary, .button-label.secondary {
  background-color: var(--secondary-color);
}

button.secondary:hover, .button-label.secondary:hover {
  background-color: #666;
}

button.danger {
    background-color: var(--error-color);
}

button.danger:hover {
    background-color: #c53030;
}

button:disabled {
    background-color: var(--secondary-color);
    cursor: not-allowed;
    opacity: 0.7;
}

.button-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.container {
  background-color: var(--surface-color);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  margin-bottom: 2rem;
}

.list {
  list-style: none;
  padding: 0;
}

.list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.2s;
}

.list-item:last-child {
  border-bottom: none;
}

.list-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-inline {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.form-inline input {
    flex-grow: 1;
}

input[type="text"],
input[type="password"],
select {
  width: 100%;
  padding: 0.75rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  background-color: #2a2a2a;
  color: var(--text-color);
  font-size: 1rem;
}

input[type="file"] {
    display: none;
}

.file-input-label {
    display: inline-block;
    padding: 0.75rem 1.25rem;
    background-color: var(--secondary-color);
    color: white;
    border-radius: var(--border-radius);
    cursor: pointer;
    text-align: center;
}

.file-input-label:hover {
    background-color: #666;
}

.training-card {
  text-align: center;
  padding: 2rem;
}

.training-card .word {
  font-size: 2.5rem;
  font-weight: bold;
  margin: 1rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.training-card .feedback {
  margin-top: 1rem;
  font-size: 1.2rem;
}

.feedback.correct {
  color: var(--success-color);
}

.feedback.incorrect {
  color: var(--error-color);
}

.ai-insight {
    margin-top: 1rem;
    font-size: 0.95rem;
    color: var(--text-muted-color);
    background-color: #2a2a2a;
    padding: 0.75rem;
    border-radius: var(--border-radius);
    text-align: left;
    line-height: 1.5;
}

.progress-bar {
    width: 100%;
    background-color: var(--secondary-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-bar-fill {
    height: 10px;
    background-color: var(--success-color);
    width: 0%;
    transition: width 0.3s;
}

.header-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.photo-add-container p {
    color: var(--text-muted-color);
    margin-bottom: 1rem;
}

.suggestion-box {
    background-color: #2a2a2a;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.75rem;
    margin-top: -0.5rem;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.suggestion-box span {
    color: var(--text-muted-color);
}

.suggestion-box button {
    padding: 0.25rem 0.75rem;
    font-size: 0.9rem;
}

.export-container {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.tabs-container {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.tab-button {
    flex: 1;
    padding: 1rem;
    background-color: transparent;
    border: none;
    color: var(--text-muted-color);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color 0.2s, border-bottom 0.2s;
    border-bottom: 3px solid transparent;
    border-radius: 0;
}

.tab-button.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.training-setup-view {
    text-align: center;
}

.training-setup-view p {
    color: var(--text-muted-color);
    margin-bottom: 1rem;
}

.mode-selection {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.mode-selection button {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    width: 100%;
    padding: 1.5rem;
    text-align: left;
    color: var(--text-color);
    transition: background-color 0.2s, transform 0.2s;
}

.mode-selection button:hover {
    background-color: #2a2a2a;
    transform: translateY(-2px);
}

.mode-selection h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.mode-selection span {
    font-size: 0.9rem;
    color: var(--text-muted-color);
    line-height: 1.4;
}

/* Spinner Styles */
.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--secondary-color);
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-indicator {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin: 2rem 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.spinner-inline {
    width: 1em;
    height: 1em;
    border: 0.15em solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
    display: inline-block;
    vertical-align: text-bottom;
}

/* --- NEU: Speak Button Styles --- */
.speak-button {
    background: none;
    border: none;
    color: var(--text-muted-color);
    cursor: pointer;
    padding: 0.25rem;
    font-size: 1.25rem; /* Größe des Icons */
    line-height: 1; /* Verhindert zusätzlichen Leerraum */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: color 0.2s, background-color 0.2s;
    vertical-align: middle;
}

.speak-button:hover {
    color: var(--primary-color);
    background-color: rgba(255, 255, 255, 0.1);
}

/* --- NEU: Notification Styles --- */
.notification {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    animation: notification-fade-in 0.3s ease-out forwards;
}

.notification.success {
    background-color: var(--success-color);
}

.notification.error {
    background-color: var(--error-color);
}

.close-button {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    line-height: 1;
    cursor: pointer;
    padding: 0 0.25rem;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.close-button:hover {
    opacity: 1;
}

@keyframes notification-fade-in {
    from {
        opacity: 0;
        transform: translate(-50%, -20px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

/* --- NEU: AUTHENTICATION STYLES --- */
.auth-container {
    max-width: 400px;
    margin: 4rem auto;
}

.auth-switch {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-muted-color);
}

.link-button {
    background: none;
    border: none;
    color: var(--primary-color);
    text-decoration: underline;
    cursor: pointer;
    font-size: inherit;
}
.link-button:hover {
    color: var(--primary-hover-color);
}

/* --- NEU: MAIN HEADER STYLES --- */
.main-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.main-header h1 {
    margin-bottom: 0;
    font-family: 'Pacifico', cursive;
    font-weight: 400;
    text-align: left;
}

.user-info {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1rem;
    margin-top: -2.5rem; /* Positioniert es rechts neben dem Titel */
    padding-bottom: 0.5rem;
}

.user-info span {
    color: var(--text-muted-color);
}

.logout-button {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* --- NEU: CORRECT ANSWER SMILEY --- */
.correct-smiley-overlay {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  font-size: 6rem;
  animation: smiley-animation 3s ease-in-out forwards;
  z-index: 2000;
  pointer-events: none;
}

@keyframes smiley-animation {
  0% {
    opacity: 0;
    transform: scale(0.5) translateY(50px);
  }
  20% {
    opacity: 1;
    transform: scale(1.1) translateY(0);
  }
  30% {
    transform: scale(1);
  }
  80% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(0.5) translateY(50px);
  }
}