/* DentHub — Layout CSS */

/* ── 헤더 ── */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header-logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.5px;
  flex-shrink: 0;
}
.header-logo span { color: var(--color-secondary); }

.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.header-nav a {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.header-nav a:hover,
.header-nav a.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.user-menu {
  position: relative;
}

.user-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  overflow: hidden;
}
.user-avatar img { width: 100%; height: 100%; object-fit: cover; }

.user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 180px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: none;
}
.user-dropdown.open { display: block; }

.user-dropdown a,
.user-dropdown button {
  display: block;
  width: 100%;
  padding: 10px 16px;
  text-align: left;
  font-size: 14px;
  color: var(--color-text);
  background: none;
  border: none;
  transition: background var(--transition);
}
.user-dropdown a:hover,
.user-dropdown button:hover {
  background: var(--color-bg);
  color: var(--color-primary);
}
.user-dropdown hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 4px 0;
}

/* ── 메인 레이아웃 ── */
#app {
  padding-top: var(--header-height);
  min-height: 100vh;
}

.page-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 20px;
}

.page-content-wrapper {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: 24px;
  margin-top: 16px;
}

.page-main { min-width: 0; }

.page-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ── 광고 슬롯 레이아웃 ── */
.ad-slot {
  display: none; /* 광고 로드 성공 시만 표시 */
  overflow: hidden;
  border-radius: var(--radius-sm);
}
.ad-slot.loaded { display: block; }

.ad-slot-top {
  width: 100%;
  max-height: 90px;
  margin-bottom: 16px;
}

.ad-slot-side {
  width: 100%;
  max-height: 250px;
}

.ad-slot-bottom {
  width: 100%;
  max-height: 90px;
  margin-top: 16px;
}

/* ── 푸터 ── */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 32px 20px;
  margin-top: 48px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-brand p {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 8px;
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 13px;
  color: var(--color-text-secondary);
}
.footer-links a:hover { color: var(--color-primary); }

.footer-copy {
  width: 100%;
  text-align: center;
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

/* ── 반응형 ── */
@media (max-width: 1024px) {
  .page-content-wrapper {
    grid-template-columns: 1fr;
  }
  .desktop-only { display: none !important; }
}

@media (max-width: 768px) {
  .header-nav { display: none; }
  .page-layout { padding: 16px 16px; }

  .ad-slot-top { max-height: 50px; }
  .ad-slot-bottom { max-height: 100px; }

  h1 { font-size: 22px; }
  h2 { font-size: 18px; }
  h3 { font-size: 16px; }

  .footer-inner { flex-direction: column; }
}

/* ── 컨테이너 ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ── 섹션 헤더 ── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

/* ── 그리드 ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}
@media (min-width: 769px) and (max-width: 1024px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

/* ── 로딩 오버레이 ── */
.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }