/* Main Styles - Learners High */

/* Base Typography */
body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

h4 {
  font-size: var(--font-size-lg);
}

h5 {
  font-size: var(--font-size-md);
}

h6 {
  font-size: var(--font-size-base);
}

/* Paragraphs */
p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-align: center;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  border: 2px solid var(--color-primary);
}

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 2px solid var(--color-border);
}

.btn--secondary:hover {
  background-color: var(--color-background-light);
  border-color: var(--color-text-primary);
}

.btn--large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-md);
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  box-shadow: 0px 2px 20px 0px rgba(0, 0, 0, 0.1);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 0 var(--spacing-2xl);
  max-width: 100%;
  margin: 0 auto;
  gap: 330px;
}

.nav__logo-link {
  display: flex;
  align-items: center;
}

.nav__logo {
  height: 41px;
  width: 172px;
  object-fit: contain;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 160px;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav__link {
  font-size: 16px;
  font-weight: var(--font-weight-regular);
  color: #3E444C;
  line-height: 1.3;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

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

.nav__link--active {
  color: #37B6B8;
  font-weight: var(--font-weight-bold);
}

.nav__cta {
  padding: 10px 16px;
  font-size: 16px;
  font-weight: var(--font-weight-bold);
  color: #37B6B8;
  background-color: transparent;
  border: 1px solid #37B6B8;
  border-radius: 100px;
  line-height: 1.6;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.nav__cta:hover {
  background-color: #37B6B8;
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(55, 182, 184, 0.3);
}

/* ================================
   Navigation Submenu
   ================================ */
.nav__item--has-submenu {
  position: relative;
}

.nav__submenu-arrow {
  font-size: 10px;
  margin-left: 4px;
  transition: transform var(--transition-fast);
}

.nav__item--has-submenu:hover .nav__submenu-arrow {
  transform: rotate(180deg);
}

.nav__submenu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 12px;
  background: #FFFFFF;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  min-width: 160px;
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  z-index: 100;
}

.nav__item--has-submenu:hover .nav__submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__submenu-item {
  list-style: none;
}

.nav__submenu-link {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: var(--font-weight-regular);
  color: #3E444C;
  line-height: 1.4;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav__submenu-link:hover {
  background-color: #F2F2F2;
  color: var(--color-primary);
}

.nav__submenu-link--active {
  color: #37B6B8;
  font-weight: var(--font-weight-semibold);
  background-color: rgba(55, 182, 184, 0.05);
}

.nav__toggle {
  display: none;
}

/* 모바일에서만 햄버거 메뉴 표시 */
@media (max-width: 1199px) {
  .nav__container {
    justify-content: space-between;
    gap: 0;
  }

  .nav__menu {
    display: none;
  }

  .nav__toggle {
    display: block;
    font-size: 1.5rem;
    color: var(--color-text-primary);
    background: none;
    border: none;
    cursor: pointer;
  }
}


/* Cards */
.card {
  background-color: var(--color-background);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card__image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.card__title {
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

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

/* Stats/Metrics */
.stat {
  text-align: center;
  padding: var(--spacing-xl);
}

.stat__number {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.stat__label {
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

.stat__description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* Form */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.form-input {
  width: 100%;
  padding: var(--spacing-md);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 191, 0.1);
}

.form-input::placeholder {
  color: var(--color-text-secondary);
  opacity: 0.6;
}

/* Footer */
.footer {
  background-color: #3E444C;
  position: relative;
  height: 254px;
  padding-top: 32px;
 }

.footer__container {
  position: relative;
  max-width: 1920px;
  margin: 0 auto;
  padding: 48px 360px 0;
  height: 157.6px;
}

.footer__info {
  position: absolute;
  left: 20px;
  top: 0;
}

.footer__company {
  font-size: 16px;
  font-weight: 350;
  color: #FFFFFF;
  line-height: 25.6px;
  margin-bottom: 8px;
}

.footer__contact {
  font-size: 16px;
  font-weight: 350;
  color: #FFFFFF;
  line-height: 25.6px;
  margin-bottom: 0;
}

.footer__links {
  position: absolute;
  right: 20px;
  top: 8.4px;
  display: flex;
  gap: 32px;
}

.footer__link {
  font-size: 16px;
  font-weight: 350;
  color: #FFFFFF;
  line-height: 25.6px;
  transition: color 0.3s ease;
  white-space: nowrap;
}



.footer__bottom {
  position: absolute;
  left: 20px;
  right: 20px;
  top: 99.2px;
  border-top: 0.8px solid #4A5568;
  padding-top: 32.4px;
}

.footer__copyright {
  font-size: 16px;
  font-weight: 350;
  color: #A0AEC0;
  line-height: 25.6px;
  text-align: center;
  margin-bottom: 0;
}

/* Mobile Responsive */
@media (max-width: 1200px) {
  .footer__container {
    padding: 48px 60px 0;
  }
}

@media (max-width: 768px) {
  .footer {
    height: auto;
  }

  .footer__container {
    padding: 30px 20px 0;
    height: auto;
    position: relative;
  }

  .footer__info {
    position: relative;
    left: 0;
    top: 0;
    margin-bottom: 30px;
  }

  .footer__company,
  .footer__contact {
    font-size: 14px;
    line-height: 22px;
  }

  .footer__links {
    position: relative;
    right: 0;
    top: 0;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 30px;
  }

  .footer__link {
    font-size: 14px;
  }

  .footer__bottom {
    position: relative;
    left: 0;
    right: 0;
    top: 0;
    padding-top: 20px;
    margin-top: 20px;
  }

  .footer__copyright {
    font-size: 12px;
    line-height: 20px;
  }
}