/* ========================================
   OBUCHENIE PAGE STYLES
   ======================================== */

/* Learning Approach Grid */
.learning-approach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 60px;
}

.approach-feature-box {
  background: var(--color-white);
  padding: 40px;
  border-radius: 20px;
  box-shadow: var(--shadow-medium);
  transition: var(--transition-smooth);
  border: 2px solid transparent;
}

.approach-feature-box:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-large);
  border-color: var(--color-accent-blue);
}

.feature-icon-circle {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.feature-icon-circle img {
  width: 40px;
  height: 40px;
  filter: brightness(0) invert(1);
}

.approach-feature-box h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-charcoal);
  margin-bottom: 16px;
}

.approach-feature-box p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-cool-gray);
}

/* Principles Timeline Section */
.principles-section {
  padding: 100px 0;
  background: var(--color-off-white);
}

.principles-timeline {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  margin-top: 60px;
}

.principle-step {
  display: flex;
  gap: 24px;
  background: var(--color-white);
  padding: 40px;
  border-radius: 20px;
  box-shadow: var(--shadow-medium);
  position: relative;
  transition: var(--transition-smooth);
}

.principle-step:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-large);
}

.step-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent-blue);
  opacity: 0.2;
  line-height: 1;
  flex-shrink: 0;
}

.step-content {
  flex: 1;
}

.step-icon {
  width: 64px;
  height: 64px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.step-icon img {
  width: 32px;
  height: 32px;
  filter: brightness(0) saturate(100%) invert(55%) sepia(94%) saturate(1820%)
    hue-rotate(198deg) brightness(103%) contrast(93%);
}

.step-content h3 {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-charcoal);
  margin-bottom: 12px;
}

.step-content p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-cool-gray);
}

/* Educational Process Section */
.educational-process-section {
  padding: 100px 0;
  background: var(--color-charcoal);
}

.educational-process-section .section-main-title {
  color: var(--color-white);
}

.educational-process-section .section-subtitle-text {
  color: var(--color-cool-gray);
}

.process-flow-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 60px;
  flex-wrap: wrap;
}

.process-card {
  background: rgba(250, 250, 250, 0.05);
  backdrop-filter: blur(10px);
  padding: 32px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  width: 220px;
  position: relative;
  transition: var(--transition-smooth);
}

.process-card:hover {
  background: rgba(250, 250, 250, 0.1);
  transform: translateY(-8px);
  border-color: var(--color-accent-blue);
}

.process-icon-bg {
  width: 64px;
  height: 64px;
  background: var(--color-accent-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.process-icon-bg img {
  width: 32px;
  height: 32px;
  filter: brightness(0) invert(1);
}

.process-card-number {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  background: rgba(59, 130, 246, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-accent-blue);
}

.process-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 12px;
}

.process-card p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.8);
}

.process-arrow {
  font-size: 2rem;
  color: var(--color-accent-blue);
  font-weight: 300;
}

/* Technologies Section */
.technologies-section {
  padding: 100px 0;
  background: var(--color-off-white);
}

.technologies-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.technologies-image-side {
  position: relative;
}

.technologies-image-side img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  border-radius: 24px;
  box-shadow: var(--shadow-large);
}

.image-decoration-circle {
  position: absolute;
  width: 200px;
  height: 200px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 50%;
  top: -40px;
  right: -40px;
  z-index: -1;
}

.technologies-content-side .section-main-title {
  text-align: left;
  margin-bottom: 16px;
}

.technologies-content-side .section-subtitle-text {
  text-align: left;
  margin-bottom: 40px;
}

.tech-features-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.tech-feature-item {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: var(--color-white);
  border-radius: 16px;
  box-shadow: var(--shadow-light);
  transition: var(--transition-smooth);
}

.tech-feature-item:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-medium);
}

.tech-icon {
  width: 56px;
  height: 56px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tech-icon img {
  width: 28px;
  height: 28px;
  filter: brightness(0) saturate(100%) invert(55%) sepia(94%) saturate(1820%)
    hue-rotate(198deg) brightness(103%) contrast(93%);
}

.tech-content h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-charcoal);
  margin-bottom: 8px;
}

.tech-content p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-cool-gray);
}

/* Quality Control Section */
.quality-control-section {
  padding: 100px 0;
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  position: relative;
  overflow: hidden;
}

.quality-control-section::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  top: -100px;
  right: -100px;
}

.quality-control-section .section-main-title {
  color: var(--color-white);
}

.quality-control-section .section-subtitle-text {
  color: rgba(255, 255, 255, 0.9);
}

.quality-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 60px;
}

.metric-box {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 40px 32px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-align: center;
  transition: var(--transition-smooth);
}

.metric-box:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-8px);
  border-color: rgba(255, 255, 255, 0.4);
}

.metric-icon-wrapper {
  width: 72px;
  height: 72px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

.metric-icon-wrapper img {
  width: 36px;
  height: 36px;
  filter: brightness(0) invert(1);
}

.metric-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
}

.metric-box h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 12px;
}

.metric-box p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .learning-approach-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .principles-timeline {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .process-flow-container {
    flex-direction: column;
  }

  .process-arrow {
    transform: rotate(90deg);
  }

  .technologies-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .quality-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

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

  .approach-feature-box {
    padding: 32px 24px;
  }

  .principle-step {
    padding: 32px 24px;
    flex-direction: column;
  }

  .step-number {
    font-size: 2rem;
  }

  .process-card {
    width: 100%;
  }

  .technologies-image-side img {
    height: 350px;
  }

  .image-decoration-circle {
    width: 150px;
    height: 150px;
  }
}