/* ===================================
   Terro AI - Home Page Styles
   =================================== */

/* Hero Section */
.hero {
  position: relative;
  overflow: hidden;
}

.hero__background {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(0, 212, 255, 0.1) 0%,
    rgba(139, 92, 246, 0.1) 50%,
    rgba(255, 61, 113, 0.1) 100%);
  background-size: 200% 200%;
  animation: gradientShift 15s ease infinite;
}

.hero__background::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(255, 61, 113, 0.1) 0%, transparent 60%);
}

.hero__background::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2300D4FF' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

@keyframes gradientShift {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero__title {
  font-size: var(--text-4xl);
  font-weight: var(--font-black);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
}

.hero__subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-8);
  max-width: 700px;
  margin-inline: auto;
}

.hero__cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
}

@media (min-width: 640px) {
  .hero__cta {
    flex-direction: row;
    justify-content: center;
  }
}

@media (min-width: 768px) {
  .hero__title {
    font-size: var(--text-5xl);
  }
}

/* Features Grid */
.features-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Steps Section */
.steps {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr;
  position: relative;
}

@media (min-width: 768px) {
  .steps {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
  }

  .steps::before {
    content: '';
    position: absolute;
    top: 60px;
    left: 12.5%;
    right: 12.5%;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0.3;
  }
}

.step {
  text-align: center;
  position: relative;
}

.step__number {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  letter-spacing: 0.1em;
}

.step__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-6);
  background: var(--color-bg-light);
  border-radius: var(--radius-2xl);
  color: var(--color-primary);
  transition: background var(--transition-base), transform var(--transition-base);
}

.step:hover .step__icon {
  background: var(--gradient-primary);
  color: var(--color-text-primary);
  transform: translateY(-4px);
}

.step__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.step__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* Use Cases Preview */
.use-cases-preview {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .use-cases-preview {
    grid-template-columns: repeat(3, 1fr);
  }
}

.use-case-preview-card {
  display: block;
  padding: var(--space-8);
  text-align: center;
  text-decoration: none;
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.use-case-preview-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-primary);
}

.use-case-preview-card__image {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100px;
  height: 100px;
  margin: 0 auto var(--space-6);
  background: var(--gradient-primary);
  border-radius: var(--radius-2xl);
  color: var(--color-text-primary);
}

.use-case-preview-card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.use-case-preview-card__description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.use-case-preview-card__link {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

.use-case-preview-card:hover .use-case-preview-card__link {
  color: var(--color-primary-light);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: repeat(2, 1fr);
  text-align: center;
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat__value {
  font-size: var(--text-3xl);
}

@media (min-width: 768px) {
  .stat__value {
    font-size: var(--text-4xl);
  }
}

/* Mission & Vision Grid */
.mission-vision-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .mission-vision-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.mission-vision-grid .card {
  padding: var(--space-8);
}

.card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.card__text {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* Values Grid */
.values-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .values-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.value-card {
  padding: var(--space-6);
  text-align: center;
}

.value-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  color: var(--color-text-primary);
}

.value-card__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.value-card__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* Footer with Contact Form */
.footer__content {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr;
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .footer__content {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.footer__contact-form {
  background: rgba(255, 255, 255, 0.05);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
}

.footer__form-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-row {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

@media (min-width: 480px) {
  .form-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

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