.hero {
  max-width: 1400px;
  margin: 0 auto;
  padding: 4rem 2rem 2rem;
  text-align: center;
}
h1 {
  font-size: clamp(2.5rem, 8vw, 6rem);
  margin-bottom: 1rem;
}
.subtitle {
  font-size: clamp(1rem, 2vw, 1.5rem);
  margin-bottom: 3rem;
}

.tab-nav {
  max-width: 1400px;
  margin: 0 auto 3rem;
  padding: 0 2rem;
  display: flex;
  border: 4px solid var(--white);
}
.tab-btn {
  flex: 1;
  padding: 1.5rem;
  background: var(--black);
  border: none;
  color: var(--white);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  text-transform: uppercase;
  cursor: pointer;
  border-right: 4px solid var(--white);
}
.tab-btn:last-child {
  border-right: none;
}
.tab-btn:hover {
  background: var(--gray);
}
.tab-btn.active {
  background: var(--honey);
  color: var(--black);
}

.tab-content {
  display: none;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem 4rem;
}
.tab-content.active {
  display: block;
}

.demo-controls,
.flashcard-controls,
.podcast-controls {
  background: var(--gray);
  border: 4px solid var(--white);
  padding: 2rem;
  margin-bottom: 2rem;
}
.demo-controls label,
.flashcard-controls label,
.podcast-controls label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

textarea {
  width: 100%;
  min-height: 300px;
  padding: 1rem;
  background: var(--black);
  border: 3px solid var(--white);
  color: var(--white);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.95rem;
  resize: vertical;
}

.btn {
  font-size: 1.1rem;
  padding: 1rem 2rem;
  width: 100%;
}
.btn-primary:hover:not(:disabled) {
  background: var(--white);
}
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.loading {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 3rem;
  border: 4px solid var(--white);
  background: var(--gray);
  margin-bottom: 2rem;
}
.loading.active {
  display: flex;
}
.hexagon-spinner {
  font-size: 3rem;
  color: var(--honey);
  animation: spin 1.5s linear infinite;
}
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.summary-header-section,
.flashcard-header-section,
.podcast-header-section {
  text-align: center;
  margin-bottom: 2rem;
  padding: 2rem;
  border: 4px solid var(--white);
  background: var(--gray);
}
.summary-header-section h3,
.flashcard-header-section h3,
.podcast-header-section h3 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 2rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.section-icon {
  width: 80px;
  height: 80px;
  margin-bottom: 1rem;
}

.summary-output {
  display: none;
  border: 4px solid var(--white);
  padding: 2rem;
  background: var(--gray);
  margin-bottom: 2rem;
}
.summary-output.active {
  display: block;
}
.summary-text {
  line-height: 1.8;
}
.summary-text strong {
  color: var(--honey);
}

.rating-section {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 3px solid var(--white);
}
.rating-btn {
  flex: 1;
  padding: 1rem;
  background: var(--black);
  border: 3px solid var(--white);
  color: var(--white);
  font-weight: 600;
  cursor: pointer;
}
.rating-btn:hover {
  background: var(--gray);
}
.rating-btn.voted {
  background: var(--honey);
  color: var(--black);
  border-color: var(--honey);
}

.flashcard-output {
  display: none;
}
.flashcard-wrapper {
  perspective: 1000px;
  margin: 3rem auto;
  max-width: 600px;
  transform-style: preserve-3d;
}
.flashcard-wrapper-inner {
  transform-style: preserve-3d;
}
.flashcard {
  width: 100%;
  height: 400px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s;
  cursor: pointer;
  transform: rotateY(0deg);
}
.flashcard.flipped {
  transform: rotateY(180deg) !important;
}
.flashcard-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border: 4px solid var(--white);
  background: var(--gray);
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.flashcard-front {
  transform: rotateY(0deg);
}
.flashcard-back {
  transform: rotateY(180deg);
}
.card-label {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--honey);
  margin-bottom: 2rem;
  letter-spacing: 2px;
}
.flashcard-face div:not(.card-label):not(.card-corner) {
  font-size: 1.5rem;
  text-align: center;
  line-height: 1.6;
}
.card-corner {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  color: var(--honey);
}

.flashcard-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  margin: 2rem 0;
}
.card-nav-btn {
  padding: 1rem 2rem;
  background: var(--black);
  border: 3px solid var(--white);
  color: var(--white);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  cursor: pointer;
}
.card-nav-btn:hover:not(:disabled) {
  background: var(--honey);
  color: var(--black);
}
.card-nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}
.card-counter {
  font-family: "JetBrains Mono", monospace;
  font-size: 1.2rem;
}
.card-hint {
  text-align: center;
  color: var(--honey);
  margin-top: 1rem;
}

.flashcard-info,
.podcast-info {
  border: 4px solid var(--white);
  padding: 2rem;
  background: var(--gray);
  margin-top: 2rem;
}

.simple-flashcard {
  max-width: 600px;
  margin: 3rem auto;
  min-height: 400px;
  background: var(--gray);
  border: 4px solid var(--white);
  padding: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s;
}

.simple-flashcard:hover {
  border-color: var(--honey);
}

.simple-flashcard #cardContent {
  text-align: center;
}

.simple-flashcard h2 {
  color: var(--honey);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
  margin-bottom: 2rem;
  letter-spacing: 2px;
}

.simple-flashcard p {
  font-size: 1.5rem;
  line-height: 1.6;
}

.podcast-player {
  display: none;
  border: 4px solid var(--white);
  padding: 2rem;
  background: var(--gray);
  margin: 2rem 0;
  text-align: center;
}
.audio-player {
  width: 100%;
  margin: 1.5rem 0;
}

.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(200%);
  padding: 1rem 2rem;
  background: var(--honey);
  color: var(--black);
  font-weight: 700;
  border: 4px solid var(--white);
  opacity: 0;
  transition: all 0.3s;
  z-index: 2000;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.paywall-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  justify-content: center;
  align-items: center;
  z-index: 9999;
}
.paywall-content {
  background: var(--black);
  border: 6px solid var(--honey);
  padding: 3rem;
  max-width: 500px;
  text-align: center;
}
.paywall-content h2 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 2rem;
  color: var(--honey);
  margin-bottom: 1rem;
}
.paywall-btn {
  padding: 1rem 2rem;
  background: var(--honey);
  color: var(--black);
  border: none;
  font-weight: 700;
  cursor: pointer;
  margin: 0.5rem;
}