:root {
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #252547;
  --accent-primary: #6366f1;
  --accent-secondary: #818cf8;
  --text-primary: #ffffff;
  --text-secondary: #b0b0c0;
  --success: #10b981;
  --error: #ef4444;
  --border-radius: 12px;
}

.tts-generator {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 2rem;
}

.section-header h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.usage-container {
  background: var(--bg-secondary);
  padding: 1rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
}

.usage-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.usage-bar {
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
}

.usage-progress {
  height: 100%;
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  border-radius: 4px;
  transition: width 0.3s ease;
}

.input-container {
  margin-bottom: 1.5rem;
}

.input-container textarea {
  width: 100%;
  padding: 1rem;
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-size: 1rem;
  resize: vertical;
  min-height: 120px;
}

.input-container textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.char-count {
  text-align: right;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.settings-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.setting-group {
  display: flex;
  flex-direction: column;
}

.setting-group label {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.setting-group select,
.setting-group input[type="range"] {
  padding: 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  color: var(--text-primary);
}

.setting-group select:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.generate-btn {
  width: 100%;
  padding: 1rem 2rem;
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  color: white;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.generate-btn:hover:not(:disabled) {
  transform: translateY(-2px);
}

.generate-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.error-message {
  background: var(--error);
  color: white;
  padding: 1rem;
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  text-align: center;
}

.subscription-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.subscription-section h3 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 1.5rem;
}

.plans-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.plan-card {
  background: var(--bg-secondary);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  border: 2px solid transparent;
}

.plan-card.current {
  border-color: var(--accent-primary);
}

.plan-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.plan-header h4 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.plan-price {
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 0.25rem;
}

.plan-interval {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.plan-features {
  list-style: none;
  padding: 0;
  margin-bottom: 1.5rem;
}

.plan-features li {
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.plan-features li:last-child {
  border-bottom: none;
}

.plan-btn {
  width: 100%;
  padding: 0.75rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.plan-btn.current {
  background: var(--text-secondary);
  color: var(--bg-primary);
  cursor: not-allowed;
}

.plan-btn.upgrade {
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  color: white;
}

.plan-btn.upgrade:hover:not(:disabled) {
  transform: translateY(-2px);
}

.plan-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

@media (max-width: 768px) {
  .settings-row {
    grid-template-columns: 1fr;
  }

  .plans-container {
    grid-template-columns: 1fr;
  }

  .tts-generator {
    padding: 1rem;
  }
}

.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  padding: 1rem;
}

.auth-card {
  background: var(--bg-secondary);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.auth-header {
  margin-bottom: 2rem;
}

.auth-header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.auth-header p {
  color: var(--text-secondary);
}

.login-btn,
.signup-btn {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  color: white;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease;
  margin-bottom: 1.5rem;
}

.login-btn:hover:not(:disabled),
.signup-btn:hover:not(:disabled) {
  transform: translateY(-2px);
}

.login-btn:disabled,
.signup-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.auth-footer {
  color: var(--text-secondary);
}

.auth-footer a {
  color: var(--accent-primary);
  text-decoration: none;
}

.auth-footer a:hover {
  text-decoration: underline;
}

.audio-player {
  background: var(--bg-secondary);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  margin-top: 2rem;
}

.audio-player h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.audio-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.play-btn {
  padding: 0.5rem 1rem;
  background: var(--accent-primary);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
}

.progress-container {
  flex: 1;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  border-radius: 4px;
  transition: width 0.1s ease;
}

.time-display {
  display: flex;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.download-options {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.download-btn,
.new-generation-btn {
  flex: 1;
  padding: 0.75rem;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-weight: 500;
}

.download-btn {
  background: var(--accent-primary);
  color: white;
}

.new-generation-btn {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--text-secondary);
}

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

.new-generation-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}