/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #000;
  --secondary-color: #fff;
  --accent-color: #8b5cf6;
  --purple-gradient: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
  --text-gray: #666;
  --text-light: #999;
  --border-color: #e0e0e0;
  --section-padding: 100px 20px;
  --dark-bg: #0a0a0a;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto",
    "Pretendard", sans-serif;
  line-height: 1.6;
  color: var(--primary-color);
  background: #fafafa;
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  padding: 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
  transition: all 0.3s ease;
}

.header__container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px 50px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header__logo {
  font-size: 32px;
  font-weight: 800;
  text-decoration: none;
  color: var(--primary-color);
  letter-spacing: -0.5px;
  transition: all 0.3s ease;
}

.header__logo:hover {
  color: var(--accent-color);
  transform: translateY(-1px);
}

.nav {
  display: flex;
  gap: 48px;
  align-items: center;
}

.nav__link {
  text-decoration: none;
  color: var(--primary-color);
  font-weight: 600;
  font-size: 14px;
  transition: all 0.3s ease;
  letter-spacing: 0.3px;
  position: relative;
  padding: 8px 4px;
  text-transform: uppercase;
}

.nav__link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: width 0.3s ease;
}

.nav__link:hover {
  color: var(--accent-color);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__link--active {
  color: var(--accent-color);
}

.nav__link--active::after {
  width: 100%;
}

.header__mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  padding: 8px;
  color: var(--primary-color);
  transition: color 0.3s ease;
}

.header__mobile-toggle:hover {
  color: var(--accent-color);
}

/* Main Content */
.main {
  margin-top: 90px;
}

/* Hero About Section */
.hero-about {
  background: #fafafa;
  padding: 100px 40px;
  overflow: hidden;
}

.hero-about__container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-about__label {
  color: var(--accent-color);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 30px;
  letter-spacing: 0.5px;
}

.hero-about__title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 30px;
  color: var(--primary-color);
}

.hero-about__description {
  font-size: 16px;
  color: var(--text-gray);
  line-height: 1.8;
}

.hero-about__circle {
  width: 500px;
  height: 500px;
  background: var(--purple-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 20px 60px rgba(139, 92, 246, 0.3);
  margin-left: auto;
}

.hero-about__circle-text {
  color: white;
  font-size: 72px;
  font-weight: 700;
  text-align: center;
}

/* Core Values Section */
.core-values {
  background: var(--dark-bg);
  padding: var(--section-padding);
  position: relative;
  overflow: hidden;
}

.core-values::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
      135deg,
      transparent 0%,
      rgba(139, 92, 246, 0.03) 50%,
      transparent 100%
    ),
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 100px,
      rgba(139, 92, 246, 0.02) 100px,
      rgba(139, 92, 246, 0.02) 200px
    );
  pointer-events: none;
}

.core-values__container {
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
}

.core-values__badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 30px;
}

.core-values__title {
  color: white;
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 80px;
  line-height: 1.4;
}

.core-values__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.value-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 40px;
  transition: all 0.3s ease;
}

.value-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(139, 92, 246, 0.3);
  transform: translateY(-5px);
}

.value-card__icon {
  margin-bottom: 30px;
}

.value-card__title {
  color: white;
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 15px;
}

.value-card__description {
  color: rgba(255, 255, 255, 0.6);
  font-size: 15px;
  line-height: 1.6;
}

/* Statistics Section */
.statistics {
  background: var(--dark-bg);
  padding: var(--section-padding);
}

.statistics__container {
  max-width: 1400px;
  margin: 0 auto;
}

.statistics__header {
  margin-bottom: 80px;
}

.statistics__badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 30px;
}

.statistics__title {
  color: white;
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.4;
}

.statistics__subtitle {
  color: rgba(255, 255, 255, 0.6);
  font-size: 16px;
  line-height: 1.8;
}

.statistics__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.stat-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 50px 30px;
  text-align: center;
  transition: all 0.3s ease;
}

.stat-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(139, 92, 246, 0.3);
  transform: translateY(-5px);
}

.stat-card__label {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  margin-bottom: 20px;
  font-weight: 500;
}

.stat-card__number {
  color: white;
  font-size: 56px;
  font-weight: 700;
  margin-bottom: 25px;
}

.stat-card__description {
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  line-height: 1.8;
}

/* Contact Section */
.contact {
  background: linear-gradient(
    to bottom,
    var(--dark-bg) 0%,
    var(--dark-bg) 50%,
    #1a1a1a 100%
  );
  padding: var(--section-padding);
}

.contact__container {
  max-width: 1400px;
  margin: 0 auto;
}

.contact__title {
  color: white;
  font-size: 72px;
  font-weight: 700;
  margin-bottom: 60px;
}

.contact__title--highlight {
  color: var(--accent-color);
}

.contact__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.contact-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 40px;
  transition: all 0.3s ease;
}

.contact-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(139, 92, 246, 0.3);
  transform: translateY(-5px);
}

.contact-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 25px;
}

.contact-card__title {
  color: white;
  font-size: 20px;
  font-weight: 600;
}

.contact-card__arrow {
  opacity: 0.5;
  transition: opacity 0.3s;
}

.contact-card:hover .contact-card__arrow {
  opacity: 1;
}

.contact-card__text {
  color: rgba(255, 255, 255, 0.4);
  font-size: 14px;
  margin-bottom: 20px;
  word-break: break-all;
}

.contact-card__link {
  color: var(--accent-color);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.3s;
}

.contact-card__link:hover {
  color: #a78bfa;
}

/* Footer */
.footer {
  background: #1a1a1a;
  color: white;
  padding: 80px 40px 40px;
}

.footer__container {
  max-width: 1400px;
  margin: 0 auto;
}

.footer__content {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 80px;
  margin-bottom: 60px;
}

.footer__heading {
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer__link {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.3s;
}

.footer__link:hover {
  color: var(--accent-color);
}

.footer__copyright {
  color: rgba(255, 255, 255, 0.3);
  font-size: 13px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 1200px) {
  .hero-about__circle {
    width: 400px;
    height: 400px;
  }

  .hero-about__circle-text {
    font-size: 56px;
  }

  .core-values__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .statistics__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .header__container {
    padding: 16px 24px;
  }

  .header__logo {
    font-size: 26px;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    gap: 0;
    padding: 16px 24px 24px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
  }

  .nav--active {
    display: flex;
  }

  .nav__link {
    padding: 16px 8px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    font-size: 15px;
  }

  .nav__link:last-child {
    border-bottom: none;
  }

  .nav__link::after {
    display: none;
  }

  .header__mobile-toggle {
    display: block;
  }

  .hero-about__container {
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .hero-about__circle {
    width: 300px;
    height: 300px;
    margin: 0 auto;
  }

  .hero-about__circle-text {
    font-size: 42px;
  }

  .hero-about__title {
    font-size: 32px;
  }

  .core-values__title,
  .statistics__title {
    font-size: 28px;
  }

  .core-values__grid,
  .contact__grid {
    grid-template-columns: 1fr;
  }

  .statistics__grid {
    grid-template-columns: 1fr;
  }

  .contact__title {
    font-size: 42px;
  }

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

/* Curriculum Hero Section */
.curriculum-hero {
  background: #000;
  padding: 120px 40px;
  color: white;
}

.curriculum-hero__container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.curriculum-hero__title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 30px;
}

.curriculum-hero__description {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
}

.curriculum-hero__video {
  display: flex;
  justify-content: center;
  align-items: center;
}

.video-player {
  position: relative;
  width: 100%;
  max-width: 500px;
}

.video-player__icon {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 20px 40px rgba(139, 92, 246, 0.3));
}

.video-player__progress {
  margin-top: 20px;
  background: rgba(255, 255, 255, 0.1);
  height: 6px;
  border-radius: 3px;
  overflow: hidden;
}

.video-player__bar {
  background: var(--accent-color);
  height: 100%;
  width: 60%;
  border-radius: 3px;
  position: relative;
}

.video-player__bar::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  background: var(--accent-color);
  border-radius: 50%;
}

/* Program Structure Section */
.program-structure {
  background: #fafafa;
  padding: var(--section-padding);
}

.program-structure__container {
  max-width: 800px;
  margin: 0 auto;
}

.program-structure__title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 40px;
  text-align: left;
}

.program-structure__list {
  list-style: none;
  padding: 0;
}

.program-structure__item {
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 18px;
  color: var(--primary-color);
}

.program-structure__item::before {
  content: "• ";
  color: var(--accent-color);
  font-weight: bold;
  margin-right: 12px;
}

/* Curriculum Section */
.curriculum-section {
  background: #fafafa;
  padding: 80px 40px;
}

.curriculum-section--alt {
  background: #f5f5f5;
}

.curriculum-section__container {
  max-width: 1400px;
  margin: 0 auto;
}

.curriculum-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.curriculum-card {
  background: white;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

.curriculum-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

.curriculum-card__image {
  width: 100%;
  height: 280px;
  background: #1a1a1a;
  overflow: hidden;
}

.curriculum-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.curriculum-card__content {
  padding: 30px;
}

.curriculum-card__title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--primary-color);
}

.curriculum-card__description {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-gray);
}

/* Apply CTA Section */
.apply-cta {
  background-image: url("https://images.unsplash.com/photo-1436491865332-7a61a109cc05?w=1600&h=400&fit=crop");
  background-size: cover;
  background-position: center;
  padding: 150px 40px;
  position: relative;
  text-align: center;
}

.apply-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
}

.apply-cta__container {
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.apply-cta__title {
  color: white;
  font-size: 72px;
  font-weight: 700;
  margin-bottom: 40px;
}

.apply-cta__button {
  display: inline-block;
  background: white;
  color: var(--primary-color);
  padding: 18px 50px;
  border-radius: 30px;
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.apply-cta__button:hover {
  background: var(--accent-color);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.4);
}

/* Responsive for Curriculum */
@media (max-width: 1200px) {
  .curriculum-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .curriculum-hero__container {
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .curriculum-hero__title {
    font-size: 32px;
  }

  .video-player {
    max-width: 350px;
  }

  .program-structure__title {
    font-size: 28px;
  }

  .curriculum-card__image {
    height: 200px;
  }

  .apply-cta {
    padding: 100px 20px;
  }

  .apply-cta__title {
    font-size: 42px;
  }
}

/* Review Hero Section */
.review-hero {
  background: #000;
  padding: 120px 40px;
  color: white;
}

.review-hero__container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.review-hero__title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 30px;
}

.review-hero__description {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
}

.review-hero__icon {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Reviews Section */
.reviews-section {
  background: #fff;
  padding: var(--section-padding);
}

.reviews-section__container {
  max-width: 1400px;
  margin: 0 auto;
}

.reviews-section__title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 40px;
}

/* Review Filters */
.review-filters {
  display: flex;
  gap: 15px;
  margin-bottom: 50px;
  flex-wrap: wrap;
}

.review-filter {
  background: transparent;
  border: 1px solid var(--border-color);
  padding: 10px 24px;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.review-filter:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.review-filter--active {
  background: #000;
  color: white;
  border-color: #000;
}

.review-filter__icon {
  display: flex;
  align-items: center;
}

/* Review Cards */
.review-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 60px;
}

.review-card {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 24px;
  transition: all 0.3s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.review-card:hover {
  border-color: #d1d5db;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

.review-card__user {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  align-items: center;
}

.review-card__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.review-card__user-info {
  flex: 1;
}

.review-card__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 4px;
}

.review-card__meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.review-card__date {
  font-size: 13px;
  color: #9ca3af;
}

.review-card__rating {
  display: flex;
  gap: 2px;
}

.review-card__rating .star {
  color: #fbbf24;
  font-size: 14px;
}

.review-card__content {
  margin-bottom: 16px;
}

.review-card__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 12px;
  line-height: 1.4;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.review-card__badge {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 12px;
  display: inline-block;
}

.review-card__text {
  font-size: 14px;
  line-height: 1.8;
  color: #4b5563;
  margin-bottom: 12px;
}

.review-card__text:last-of-type {
  margin-bottom: 0;
}

.review-card__footer {
  display: flex;
  justify-content: flex-start;
  padding-top: 16px;
  border-top: 1px solid #f3f4f6;
}

.review-card__like {
  background: none;
  border: none;
  display: flex;
  align-items: center;
  gap: 6px;
  color: #9ca3af;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
  font-weight: 600;
}

.review-card__like:hover {
  color: #ef4444;
}

.review-card__like:hover svg {
  fill: #ef4444;
  stroke: #ef4444;
}

.review-card__like--active {
  color: #ef4444;
}

.review-card__like--active svg {
  fill: #ef4444;
}

/* Review Card Item (for index.html) */
.review-card-item {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 24px;
  transition: all 0.3s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.review-card-item:hover {
  border-color: #d1d5db;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

.review-card-item__user {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  align-items: center;
}

.review-card-item__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.review-card-item__user-info {
  flex: 1;
}

.review-card-item__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 4px;
}

.review-card-item__meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.review-card-item__date {
  font-size: 13px;
  color: #9ca3af;
}

.review-card-item__rating {
  display: flex;
  gap: 2px;
}

.review-card-item__rating .star {
  color: #fbbf24;
  font-size: 14px;
}

.review-card-item__content {
  margin-bottom: 0;
}

.review-card-item__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 12px;
  line-height: 1.4;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.review-card-item__badge {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 12px;
  display: inline-block;
}

.review-card-item__text {
  font-size: 14px;
  line-height: 1.8;
  color: #4b5563;
  margin-bottom: 12px;
}

.review-card-item__text:last-of-type {
  margin-bottom: 0;
}

/* Reviews Footer */
.reviews-section__footer {
  text-align: center;
}

.load-more-btn {
  background: var(--accent-color);
  color: white;
  border: none;
  padding: 14px 50px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.load-more-btn:hover {
  background: #7c3aed;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(139, 92, 246, 0.3);
}

/* Review CTA Section */
.review-cta {
  background: linear-gradient(135deg, #fce7f3 0%, #ddd6fe 50%, #e0f2fe 100%);
  padding: 120px 40px;
  text-align: center;
}

.review-cta__container {
  max-width: 1000px;
  margin: 0 auto;
}

.review-cta__title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--primary-color);
}

/* Responsive for Review */
@media (max-width: 1200px) {
  .review-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .review-hero__container {
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .review-hero__title {
    font-size: 32px;
  }

  .review-hero__icon svg {
    width: 200px;
    height: auto;
  }

  .review-cards {
    grid-template-columns: 1fr;
  }

  .review-cta__title {
    font-size: 24px;
  }

  .apply-cta {
    padding: 100px 20px;
  }
}

/* ===== QNA Page Styles ===== */
.qna-hero {
  background-color: var(--primary-color);
  color: var(--text-on-dark);
  padding: 120px 20px 80px;
}

.qna-hero__container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.qna-hero__content {
  padding-right: 40px;
}

.qna-hero__title {
  font-size: 56px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.qna-hero__description {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
}

.qna-hero__icons {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* QNA Section */
.qna-section {
  background-color: #fff;
  padding: 80px 20px;
}

.qna-section__container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 60px;
}

/* QNA Sidebar */
.qna-sidebar {
  position: sticky;
  top: 100px;
  height: fit-content;
}

.qna-sidebar__title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 30px;
  color: var(--primary-color);
}

/* QNA Filters */
.qna-filters {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 30px;
}

.qna-filter {
  padding: 12px 20px;
  background-color: #f5f5f5;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: #666;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: left;
}

.qna-filter:hover {
  background-color: #e5e5e5;
  color: var(--primary-color);
}

.qna-filter--active {
  background-color: var(--primary-color);
  color: #fff;
}

/* QNA Search */
.qna-search {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.qna-search__input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.3s ease;
}

.qna-search__input:focus {
  border-color: var(--accent-color);
}

.qna-search__button {
  width: 44px;
  height: 44px;
  background-color: var(--primary-color);
  border: none;
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.3s ease;
}

.qna-search__button:hover {
  background-color: #333;
}

/* QNA Content */
.qna-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* QNA Item */
.qna-item {
  background-color: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 12px;
  padding: 24px;
  transition: all 0.3s ease;
}

.qna-item:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.qna-item__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.qna-item__title-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

.qna-item__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary-color);
}

.qna-item__badges {
  display: flex;
  gap: 6px;
}

.qna-item__badge {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.qna-item__badge--new {
  background-color: var(--accent-color);
  color: #fff;
}

.qna-item__badge--lock {
  background-color: #f5f5f5;
  color: #999;
}

.qna-item__toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: #999;
  transition: transform 0.3s ease;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qna-item--active .qna-item__toggle {
  transform: rotate(180deg);
}

.qna-item__toggle:hover {
  color: var(--accent-color);
}

.qna-item__content {
  display: none;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid #f0f0f0;
  color: #666;
  line-height: 1.8;
}

.qna-item--active .qna-item__content {
  display: block;
}

/* Write Button */
.qna-write-btn {
  align-self: flex-end;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--accent-color), #7c3aed);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.qna-write-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.3);
}

/* ===== Responsive - Mobile ===== */
@media (max-width: 768px) {
  .qna-hero__container {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .qna-hero__content {
    padding-right: 0;
    text-align: center;
  }

  .qna-hero__title {
    font-size: 36px;
  }

  .qna-hero__icons svg {
    width: 250px;
    height: auto;
  }

  .qna-section__container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .qna-sidebar {
    position: static;
  }

  .qna-filters {
    flex-direction: row;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .qna-filter {
    white-space: nowrap;
  }

  .qna-item__title {
    font-size: 16px;
  }

  .qna-search {
    flex-direction: column;
  }

  .qna-search__button {
    width: 100%;
  }
}

/* ===== Index Page Styles ===== */
/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 100px 20px 50px;
  position: relative;
  background: #000;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 1000px;
  height: 1000px;
  background: radial-gradient(
    circle,
    rgba(139, 92, 246, 0.3) 0%,
    rgba(124, 58, 237, 0.2) 25%,
    rgba(88, 28, 135, 0.15) 50%,
    transparent 70%
  );
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -200px;
  right: -200px;
  width: 800px;
  height: 800px;
  background: radial-gradient(
    circle,
    rgba(139, 92, 246, 0.25) 0%,
    rgba(124, 58, 237, 0.15) 40%,
    transparent 70%
  );
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.badge {
  position: absolute;
  padding: 10px 20px;
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
  border-radius: 24px;
  font-size: 13px;
  font-weight: 700;
  color: white;
  transition: transform 0.3s ease;
  will-change: transform;
  z-index: 1;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.badge.blockchain {
  top: 25%;
  left: 12%;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
}

.badge.data {
  top: 15%;
  right: 18%;
  background: linear-gradient(135deg, #ec4899, #db2777);
}

.badge.ai {
  top: 50%;
  right: 12%;
  background: linear-gradient(135deg, #a855f7, #9333ea);
}

.badge.backend {
  bottom: 30%;
  left: 8%;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.badge.frontend {
  bottom: 20%;
  right: 8%;
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.hero-content {
  text-align: center;
  max-width: 900px;
  z-index: 1;
  transform: translateY(0);
  transition: transform 0.5s ease;
  will-change: transform, opacity;
  color: white;
}

.hero h1 {
  font-size: 52px;
  line-height: 1.3;
  margin-bottom: 30px;
  font-weight: 800;
  color: white;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 40px;
}

.cta-button {
  display: inline-block;
  padding: 18px 48px;
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
  color: #fff;
  border: none;
  border-radius: 32px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.4);
  text-decoration: none;
}

.cta-button:hover {
  background: linear-gradient(135deg, #7c3aed, #6d28d9);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(139, 92, 246, 0.5);
  color: #fff;
  text-decoration: none;
}

/* Stats Section */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  max-width: 1200px;
  margin: 60px auto;
  padding: 40px 20px;
  background: rgba(20, 20, 20, 0.6);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 24px;
  backdrop-filter: blur(10px);
  transform: translateY(0);
  transition: transform 0.5s ease;
  will-change: transform;
}

.stat-item {
  text-align: center;
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.stat-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.stat-item:nth-child(1) {
  transition-delay: 0.1s;
}
.stat-item:nth-child(2) {
  transition-delay: 0.2s;
}
.stat-item:nth-child(3) {
  transition-delay: 0.3s;
}
.stat-item:nth-child(4) {
  transition-delay: 0.4s;
}

.stat-number {
  font-size: 52px;
  font-weight: 800;
  color: white;
  margin-bottom: 10px;
}

.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

/* Curriculum Section */
.curriculum {
  padding: 100px 20px;
  background: #f5f5f5;
  color: #000;
}

.section-header {
  text-align: center;
  margin-bottom: 20px;
}

.section-subtitle {
  color: #8b5cf6;
  font-weight: 600;
  margin-bottom: 10px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 60px;
}

.curriculum-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.curriculum-card {
  background: #000;
  color: #fff;
  padding: 40px 30px;
  border-radius: 20px;
  position: relative;
  min-height: 280px;
  opacity: 0;
  transform: translateY(80px);
  transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.curriculum-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.curriculum-card:nth-child(1) {
  transition-delay: 0.1s;
}

.curriculum-card:nth-child(2) {
  transition-delay: 0.3s;
}

.curriculum-card:nth-child(3) {
  transition-delay: 0.5s;
}

.curriculum-card:nth-child(4) {
  transition-delay: 0.7s;
}

.curriculum-card.best::before {
  content: "BEST";
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 6px 16px;
  background: #8b5cf6;
  border-radius: 15px;
  font-size: 12px;
  font-weight: 700;
}

.week-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 15px;
}

.week-description {
  font-size: 14px;
  line-height: 1.8;
  color: #d1d5db;
  margin-bottom: 40px;
}

.shape-container {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: auto;
}

.shape {
  width: 80px;
  height: 80px;
  border-radius: 50%;
}

.shape.filled {
  background: #8b5cf6;
}

.shape.outlined {
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.shape.blue {
  background: #3b82f6;
}

.triangle {
  width: 0;
  height: 0;
  border-left: 40px solid transparent;
  border-right: 40px solid transparent;
  border-bottom: 70px solid #ec4899;
}

.rectangle {
  width: 60px;
  height: 80px;
  background: #a855f7;
}

/* Review Section */
.review {
  padding: 100px 20px;
  background: #f9fafb;
  color: #000;
  text-align: center;
}

.review > * {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s ease;
}

.review.visible > * {
  opacity: 1;
  transform: translateY(0);
}

.review > .section-subtitle {
  transition-delay: 0.1s;
}

.review > .section-title {
  transition-delay: 0.2s;
}

.review > .alert-icon {
  transition-delay: 0.3s;
}

.review > .review-message {
  transition-delay: 0.4s;
}

.alert-icon {
  width: 80px;
  height: 80px;
  border: 3px solid #d1d5db;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: #9ca3af;
  margin: 0 auto 30px;
}

.review-message {
  font-size: 18px;
  color: #6b7280;
  line-height: 1.8;
}

/* FAQ Section */
.faq {
  padding: 100px 20px;
  background: #fff;
  color: #000;
}

.faq-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.faq-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: all 0.8s ease;
}

.faq-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.faq-right {
  background: #000;
  color: #fff;
  padding: 60px;
  border-radius: 20px;
  position: relative;
  overflow: hidden;
  opacity: 1;
  transform: translateX(0);
  transition: all 0.8s ease;
  transition-delay: 0.2s;
}

.faq-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.faq-left h2 {
  font-size: 36px;
  margin-bottom: 40px;
  font-weight: 700;
}

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

.faq-item {
  background: #f9fafb;
  border-radius: 12px;
  padding: 24px;
  transition: all 0.3s ease;
  border: 1px solid #e5e7eb;
}

.faq-item:hover {
  background: #f3f4f6;
  border-color: #d1d5db;
  transform: translateX(4px);
}

.faq-item__question {
  font-size: 16px;
  font-weight: 600;
  color: #000;
  margin-bottom: 12px;
  line-height: 1.6;
  display: flex;
  gap: 8px;
}

.faq-item__icon {
  color: #8b5cf6;
  font-weight: 700;
  flex-shrink: 0;
}

.faq-item__answer {
  font-size: 15px;
  color: #4b5563;
  line-height: 1.7;
  display: flex;
  gap: 8px;
  padding-left: 24px;
}

.faq-item__emoji {
  flex-shrink: 0;
}

.inbox-icon {
  width: 120px;
  height: 80px;
  border: 2px solid #d1d5db;
  border-radius: 10px;
  margin-bottom: 30px;
  position: relative;
}

.inbox-icon::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40%;
  border-top: 2px solid #d1d5db;
}

.empty-message {
  color: #9ca3af;
  margin-bottom: 30px;
}

.search-button {
  padding: 14px 32px;
  background: #8b5cf6;
  color: #fff;
  border: none;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.faq-question {
  font-size: 18px;
  line-height: 1.8;
  margin-bottom: 30px;
}

.faq-action {
  display: inline-block;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 40px;
  color: #fff;
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
  padding: 16px 40px;
  border-radius: 30px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

.faq-action:hover {
  background: linear-gradient(135deg, #7c3aed, #6d28d9);
  color: #fff;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.5);
}

.gradient-circle {
  position: absolute;
  bottom: -50px;
  right: -50px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, #8b5cf6 0%, transparent 70%);
  border-radius: 50%;
  opacity: 0.6;
}

/* Index Mobile Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 32px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .badge {
    display: none;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .stat-number {
    font-size: 36px;
  }

  .section-title {
    font-size: 28px;
  }

  .curriculum-grid {
    grid-template-columns: 1fr;
  }

  .faq-content {
    grid-template-columns: 1fr;
  }

  .faq-left h2 {
    font-size: 28px;
    margin-bottom: 30px;
  }

  .faq-item {
    padding: 20px;
  }

  .faq-item__question {
    font-size: 15px;
  }

  .faq-item__answer {
    font-size: 14px;
    padding-left: 20px;
  }

  .faq-right {
    padding: 40px 30px;
  }
}