/* ===== 레이아웃 ===== */

/* 메인 컨테이너 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.container--narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

/* ===== 공통 페이지 헤더 (framework, diagnose, result, history) ===== */
.page-header {
  background: #1a1a1a;
  position: relative;
  overflow: hidden;
  padding: var(--spacing-xxl) 0;
  border-bottom: 1px solid #333333;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(180, 50, 30, 0.22) 0%, transparent 55%),
    radial-gradient(ellipse at 80% 20%, rgba(180, 50, 30, 0.10) 0%, transparent 50%);
  pointer-events: none;
}

.page-header .container {
  position: relative;
  z-index: 1;
}

.page-header__back {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--red-accent);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
  transition: opacity var(--transition-fast);
}

.page-header__back:hover {
  color: #ff7066;
  opacity: 1;
}

.page-header__title {
  font-size: 2.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: var(--spacing-sm);
}

.page-header__sub {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--spacing-md);
}

.page-header__badge {
  display: inline-block;
  padding: 4px 14px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.05em;
}

/* ===== 메인 콘텐츠 영역 ===== */
.page-main {
  padding: var(--spacing-xxl) 0;
}

.section {
  margin-bottom: var(--spacing-xxl);
}

.section__title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-subtle);
}

/* ===== 그리드 ===== */
.three-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.two-col-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.auto-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

/* ===== 네비게이션 ===== */
.site-nav {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--spacing-md) 0;
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-nav__logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.site-nav__links {
  display: flex;
  gap: var(--spacing-lg);
}

.site-nav__links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.site-nav__links a:hover,
.site-nav__links a.active {
  color: var(--text-primary);
}

/* ===== 푸터 ===== */
.site-footer {
  background: #1a1a1a;
  border-top: 1px solid #2a2a2a;
  padding: 40px 0;
  margin-top: auto;
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.site-footer__brand {
  font-size: 0.875rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--red-accent);
}

.site-footer__copy {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.35);
}

.site-footer__links {
  display: none;
}

.site-footer__links a {
  display: none;
}

/* ===== AI Engine 배너 ===== */
.ai-engine-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid var(--blue-info);
  border-radius: var(--radius-md);
  background: rgba(52, 152, 219, 0.08);
  margin-bottom: var(--spacing-lg);
}

.ai-engine-banner__text {
  font-size: 0.875rem;
  color: var(--blue-info);
  flex: 1;
}

.ai-engine-banner__close {
  background: none;
  border: none;
  color: var(--blue-info);
  font-size: 1rem;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  opacity: 0.7;
  transition: opacity var(--transition-fast);
  flex-shrink: 0;
}

.ai-engine-banner__close:hover {
  opacity: 1;
}

/* ===== 뉴스레터 배너 ===== */
.newsletter-bar {
  background: #2d2d2d;
  border-top: 1px solid #3a3a3a;
  border-bottom: 1px solid #3a3a3a;
  padding: 18px 0;
}

.newsletter-bar .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.newsletter-bar__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #cccccc;
  white-space: nowrap;
}

.newsletter-bar__desc {
  font-size: 0.8125rem;
  color: #888888;
}

.newsletter-bar__btn {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  background: var(--green-cta);
  color: white;
  border-radius: 20px;
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.newsletter-bar__btn:hover {
  background: var(--green-dark);
  color: white;
}

/* ===== 반응형 ===== */
@media (max-width: 900px) {
  .three-card-grid {
    grid-template-columns: 1fr;
  }

  .two-col-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 var(--spacing-lg);
  }

  .page-header__title {
    font-size: 1.75rem;
  }
}