* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 0;
  margin: 0;
  color: #1a1a1a;
}

.app {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px 80px 20px;
}

h1 {
  font-size: 3.5rem;
  margin: 0;
  font-weight: 800;
  color: white;
  letter-spacing: -2px;
}

.app-header {
  text-align: center;
  padding: 100px 40px 60px 40px;
  margin-bottom: 0;
  color: white;
}

.header-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-bottom: 32px;
  flex-direction: column;
}

.bulb {
  font-size: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  animation: bounce 2s infinite;
  flex-shrink: 0;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.app-header h1 {
  display: block;
  font-size: 3.5rem;
  margin: 0;
  font-weight: 800;
  color: white;
  letter-spacing: -2px;
}

.tagline {
  font-size: 1.5rem;
  margin: 24px 0 0;
  font-weight: 600;
  color: white;
  letter-spacing: -0.5px;
  line-height: 1.3;
}

.subtagline {
  font-size: 1.1rem;
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 400;
  letter-spacing: -0.2px;
  line-height: 1.5;
}

.user-section {
  background: #f8f7fc;
  padding: 48px 48px;
  margin-bottom: 0;
  border-radius: 20px 20px 0 0;
  width: 100%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.user-section label {
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
  color: #888;
  margin-bottom: 14px;
}

.user-section input[type="text"] {
  width: 100%;
  padding: 16px 18px;
  font-size: 1.05rem;
  border: 1px solid #e8e8f0;
  border-radius: 14px;
  background: #fafbfd;
  color: #1a1a1a;
  transition: all 0.2s ease;
  font-family: inherit;
}

.user-section input[type="text"]:focus {
  outline: none;
  border-color: #667eea;
  background: #f8f7fc;
  box-shadow: 0 0 0 5px rgba(102, 126, 234, 0.1);
}

.user-section input[type="text"]::placeholder {
  color: #ccc;
}

.recorder-card {
  background: #f8f7fc;
  padding: 48px 48px;
  margin-bottom: 0;
  border-radius: 0 0 20px 20px;
  width: 100%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.recorder-card h2 {
  font-size: 1.75rem;
  margin: 0 0 32px;
  color: #1a1a1a;
  font-weight: 700;
}

.recorder-controls {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}

.recorder-status {
  margin: 18px 0;
  color: #999;
  font-size: 0.95rem;
  font-weight: 500;
  min-height: 24px;
  width: 100%;
}

audio {
  width: 100%;
  margin: 18px 0;
  border-radius: 8px;
}

button {
  padding: 14px 24px;
  font-size: 1rem;
  background: #667eea;
  color: white;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s ease;
  letter-spacing: -0.3px;
  white-space: nowrap;
}

button:hover:not(:disabled) {
  background: #5568d3;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(102, 126, 234, 0.3);
}

button:active:not(:disabled) {
  transform: translateY(0);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.primary {
  flex: 1;
  background: #667eea;
  color: white;
}

.secondary {
  flex: 1;
  background: #f0eff5;
  color: #888;
  border: 1px solid #e8e8f0;
}

.secondary:hover:not(:disabled) {
  background: #e8e6f2;
  border-color: #d8d6e8;
  box-shadow: none;
}

.send-btn {
  width: 100%;
  padding: 18px 28px;
  margin-top: 10px;
  font-size: 1.05rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
  border-radius: 14px;
}

.send-btn:hover:not(:disabled) {
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

#statusOverlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  backdrop-filter: blur(4px);
}

#statusOverlay.hidden {
  display: none;
}

.status-content {
  text-align: center;
  max-width: 90%;
  padding: 40px;
  background: #f8f7fc;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

#statusText {
  font-size: 1.3rem;
  font-weight: 500;
  margin-top: 20px;
  word-wrap: break-word;
  color: #667eea;
}

.spinner {
  width: 56px;
  height: 56px;
  border: 4px solid #e8e8f0;
  border-top: 4px solid #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.idea-card {
  background: #f8f7fc;
  padding: 48px 48px;
  margin: 32px 0;
  border-radius: 20px;
  width: 100%;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.idea-card h2 {
  font-size: 2.2rem;
  margin: 0 0 32px;
  color: #667eea;
  font-weight: 800;
  letter-spacing: -1px;
}

.idea-card section {
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid #f0eff5;
  word-wrap: break-word;
}

.idea-card section:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}
.export-section {
  margin: 28px 0 28px 0;
  padding: 0;
  background: transparent;
  border: none;
  border-top: 1px solid #f0eff5;
  border-bottom: 1px solid #f0eff5;
  border-radius: 0;
}

.export-section h3 {
  font-size: 0.8rem;
  font-weight: 600;
  color: #999;
  margin: 16px 0 12px 0;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.export-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.export-btn {
  flex: 1;
  min-width: 130px;
  padding: 12px 18px;
  background: white;
  color: #667eea;
  border: 1px solid #e8e8f0;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: -0.3px;
}

.export-btn:hover:not(:disabled) {
  background: #fafbfd;
  border-color: #667eea;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.12);
  transform: translateY(-1px);
}

.export-btn:active:not(:disabled) {
  transform: translateY(0);
}

.export-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.export-notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 14px 20px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  font-weight: 600;
  font-size: 0.9rem;
  color: #667eea;
  z-index: 1000;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
  pointer-events: none;
  backdrop-filter: blur(10px);
}

.export-notification.success {
  border-left: 3px solid #22c55e;
  color: #22c55e;
}

.export-notification.error {
  border-left: 3px solid #ef4444;
  color: #ef4444;
}

.export-notification.show {
  opacity: 1;
  transform: translateY(0);
}
.idea-card h3 {
  font-size: 0.9rem;
  font-weight: 700;
  color: #667eea;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.idea-card p {
  margin: 0;
  line-height: 1.7;
  color: #555;
  font-size: 1.05rem;
  word-wrap: break-word;
}

.idea-card ul {
  margin: 10px 0 0;
  padding-left: 22px;
}

.idea-card li {
  font-size: 1.05rem;
  color: #555;
  line-height: 1.7;
  margin-bottom: 8px;
  word-wrap: break-word;
}

.feedback-card {
  background: #f8f7fc;
  padding: 48px 48px;
  margin: 24px 0 32px 0;
  border-radius: 20px;
  width: 100%;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.feedback {
  margin: 0;
  padding: 0;
  border-top: none;
}

.feedback textarea {
  width: 100%;
  min-height: 110px;
  padding: 14px 16px;
  border: 1px solid #e8e8f0;
  border-radius: 14px;
  font-family: inherit;
  font-size: 1.05rem;
  color: #1a1a1a;
  margin-bottom: 12px;
  background: #fafbfd;
  resize: vertical;
  transition: all 0.2s ease;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.feedback textarea:focus {
  outline: none;
  border-color: #667eea;
  background: #f8f7fc;
  box-shadow: 0 0 0 5px rgba(102, 126, 234, 0.1);
}

.feedback textarea:disabled {
  background: #f0eff5;
  color: #bbb;
}

.char-counter {
  text-align: right;
  font-size: 0.9rem;
  color: #bbb;
  margin-bottom: 14px;
}

.feedback-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.feedback-actions button {
  flex: 1;
  min-width: 140px;
  padding: 12px 18px;
  background: white;
  color: #667eea;
  border: 1.5px solid #e8e8f0;
  font-size: 0.95rem;
  border-radius: 14px;
}

.feedback-actions button:hover:not(:disabled) {
  background: #fafbfd;
  border-color: #667eea;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.15);
}

.feedback-error {
  margin-top: 12px;
  font-size: 0.95rem;
  color: #667eea;
  text-align: center;
  min-height: 20px;
  word-wrap: break-word;
}

.hidden {
  display: none !important;
}

/* TABLET: 768px and below */
@media (max-width: 768px) {
  .app {
    padding: 0 16px 60px 16px;
  }

  h1 {
    font-size: 2.8rem;
  }

  .app-header {
    padding: 80px 32px 48px 32px;
  }

  .header-title {
    gap: 18px;
    margin-bottom: 24px;
  }

  .bulb {
    font-size: 60px;
  }

  .tagline {
    font-size: 1.3rem;
  }

  .subtagline {
    font-size: 1rem;
  }

  .user-section,
  .recorder-card {
    padding: 36px 32px;
  }

  .user-section input[type="text"] {
    padding: 13px 16px;
    font-size: 1rem;
  }

  .recorder-card h2 {
    font-size: 1.5rem;
    margin-bottom: 24px;
  }

  .idea-card {
    padding: 36px 32px;
    margin: 24px 0;
  }

  .idea-card h2 {
    font-size: 1.8rem;
    margin-bottom: 24px;
  }

  .idea-card section {
    margin-bottom: 24px;
    padding-bottom: 24px;
  }

  .feedback-card {
    padding: 36px 32px;
    margin: 20px 0 28px 0;
  }
}

/* MOBILE: 480px and below */
@media (max-width: 480px) {
  .export-section {
    margin: 20px 0 20px 0;
    padding: 0;
  }

  .export-section h3 {
    margin: 14px 0 10px 0;
    font-size: 0.75rem;
  }

  .export-buttons {
    gap: 8px;
    flex-direction: column;
  }

  .export-btn {
    width: 100%;
    min-width: auto;
    padding: 11px 14px;
    font-size: 0.85rem;
  }

  .export-notification {
    bottom: 16px;
    right: 12px;
    left: 12px;
    padding: 12px 16px;
    font-size: 0.8rem;
    border-radius: 8px;
  }

  .feedback-card {
    padding: 24px 20px;
    margin: 16px 0 24px 0;
    border-radius: 16px;
  }
  .app {
    padding: 0 16px 50px 16px;
  }

  h1 {
    font-size: 2rem;
  }

  .app-header {
    padding: 60px 20px 36px 20px;
  }

  .header-title {
    gap: 12px;
    margin-bottom: 18px;
  }

  .bulb {
    font-size: 45px;
  }

  .tagline {
    font-size: 1.1rem;
    margin: 16px 0 0;
  }

  .subtagline {
    font-size: 0.95rem;
    margin-top: 8px;
  }

  .user-section,
  .recorder-card {
    padding: 24px 20px;
    border-radius: 16px;
  }

  .user-section {
    border-radius: 16px 16px 0 0;
  }

  .recorder-card {
    border-radius: 0 0 16px 16px;
  }

  .user-section label {
    font-size: 0.9rem;
    margin-bottom: 10px;
  }

  .user-section input[type="text"] {
    padding: 12px 14px;
    font-size: 1rem;
  }

  .recorder-card h2 {
    font-size: 1.25rem;
    margin-bottom: 18px;
  }

  .recorder-controls {
    gap: 12px;
    flex-direction: column;
  }

  button {
    padding: 12px 18px;
    font-size: 0.95rem;
  }

  .send-btn {
    padding: 14px 20px;
    margin-top: 8px;
    font-size: 1rem;
  }

  .idea-card {
    padding: 24px 20px;
    margin: 20px 0;
    border-radius: 16px;
  }

  .idea-card h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
  }

  .idea-card section {
    margin-bottom: 20px;
    padding-bottom: 20px;
  }

  .idea-card h3 {
    font-size: 0.85rem;
    margin-bottom: 8px;
  }

  .idea-card p {
    font-size: 0.95rem;
  }

  .idea-card li {
    font-size: 0.95rem;
    margin-bottom: 6px;
  }

  .feedback {
    margin-top: 20px;
    padding-top: 20px;
  }

  .feedback textarea {
    min-height: 90px;
    font-size: 1rem;
    padding: 11px 13px;
    margin-bottom: 10px;
  }

  .char-counter {
    font-size: 0.85rem;
    margin-bottom: 10px;
  }

  .feedback-actions {
    gap: 10px;
    flex-direction: column;
  }

  .feedback-actions button {
    min-width: 100%;
    padding: 11px 14px;
    font-size: 0.9rem;
  }

  .feedback-error {
    font-size: 0.9rem;
    margin-top: 10px;
  }
}

/* SMALL MOBILE: 375px and below */
@media (max-width: 375px) {
  .app {
    padding: 0 12px 40px 12px;
  }

  .export-notification {
    bottom: 12px;
    right: 8px;
    left: 8px;
    padding: 11px 14px;
    font-size: 0.75rem;
    border-radius: 8px;
  }

  .export-section {
    margin: 16px 0 16px 0;
  }

  .export-btn {
    padding: 10px 12px;
    font-size: 0.8rem;
  }

  .feedback-card {
    padding: 20px 16px;
    margin: 14px 0 20px 0;
  }

  h1 {
    font-size: 1.75rem;
  }

  .app-header {
    padding: 50px 16px 28px 16px;
  }

  .bulb {
    font-size: 40px;
  }

  .tagline {
    font-size: 1rem;
  }

  .subtagline {
    font-size: 0.9rem;
  }

  .user-section,
  .recorder-card {
    padding: 20px 16px;
  }

  .user-section input[type="text"] {
    padding: 10px 12px;
  }

  .recorder-card h2 {
    font-size: 1.1rem;
  }

  .idea-card {
    padding: 20px 16px;
    margin: 16px 0;
  }

  .idea-card h2 {
    font-size: 1.3rem;
    margin-bottom: 16px;
  }

  .feedback textarea {
    min-height: 80px;
    font-size: 0.95rem;
  }
}

/* SOCIAL FOOTER */

.social-footer {
  margin-top: 40px;
  padding: 24px 0;
  text-align: center;
}

.footer-text {
  margin: 0 0 12px;
  font-size: 0.85rem;
  color: #999;
  font-weight: 400;
}

.social-links {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: transparent;
  color: #999;
  text-decoration: none;
  border: none;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.social-link:hover {
  background: rgba(102, 126, 234, 0.1);
  color: #667eea;
}

.social-link span {
  font-size: 1rem;
}

@media (max-width: 480px) {
  .social-footer {
    margin-top: 30px;
    padding: 20px 0;
  }

  .footer-text {
    font-size: 0.8rem;
    margin-bottom: 10px;
  }

  .social-links {
    gap: 10px;
  }

  .social-link {
    padding: 5px 10px;
    font-size: 0.8rem;
  }

  .social-link span {
    font-size: 0.9rem;
  }
}