/* =========================================================
   Site Shell
========================================================= */

.site-shell {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);

  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);

  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.site-header__inner {
  min-height: 78px;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.site-brand {
  min-width: 0;

  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-brand__logo {
  width: 58px;
  height: 54px;
  flex-shrink: 0;
}

.site-brand__logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.site-brand__text {
  min-width: 0;
}

.site-brand__name,
.site-brand__subtitle {
  display: block;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.site-brand__name {
  color: var(--color-navy);
  font-size: var(--font-size-md);
  font-weight: 700;
}

.site-brand__subtitle {
  color: var(--text-muted);
  font-size: var(--font-size-xs);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-main {
  width: 100%;
  flex: 1;
}

.site-footer {
  margin-top: auto;

  background: var(--color-surface-soft);
  border-top: 1px solid var(--color-border);
}

.site-footer__inner {
  min-height: 82px;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.site-footer__text {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.site-footer__links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-footer__links a {
  color: var(--color-navy);
  font-size: var(--font-size-sm);

  transition:
    color var(--transition-fast),
    transform var(--transition-fast);
}

.site-footer__links a:hover {
  color: var(--color-primary);
  transform: translateY(-1px);
}

/* =========================================================
   Page Layout
========================================================= */

.page-section {
  padding-block: var(--space-12);
}

.page-section--compact {
  padding-block: var(--space-8);
}

.page-section--large {
  padding-block: var(--space-16);
}

.page-header {
  margin-bottom: var(--space-8);
}

.page-header__eyebrow {
  margin-bottom: var(--space-2);

  display: inline-flex;
  align-items: center;
  gap: var(--space-2);

  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: 700;
}

.page-header__eyebrow::before {
  content: "";
  width: 22px;
  height: 3px;

  background: var(--color-primary);
  border-radius: var(--radius-pill);
}

.page-header__title {
  margin-bottom: var(--space-3);

  color: var(--color-navy);
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.03em;
}

.page-header__description {
  max-width: 720px;

  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  line-height: 1.8;
}

/* =========================================================
   Login Structure
========================================================= */

.auth-layout {
  min-height: 100dvh;

  display: grid;
  grid-template-columns:
    minmax(500px, 0.9fr)
    minmax(0, 1.1fr);
}

.auth-layout__visual {
  position: relative;

  display: flex;
  overflow: hidden;
}

.auth-layout__visual::before,
.auth-layout__visual::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.auth-layout__visual-content {
  position: relative;
  z-index: 1;
}

.auth-layout__content {
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-layout__panel {
  width: min(100%, 520px);
}

/* =========================================================
   Legacy Survey Layout
========================================================= */

.survey-layout {
  display: grid;
  grid-template-columns:
    var(--sidebar-width)
    minmax(0, 1fr);

  align-items: start;
  gap: var(--space-8);
}

.survey-sidebar {
  position: sticky;
  top: 100px;
}

.survey-content {
  min-width: 0;
}

/* =========================================================
   Legacy Admin Layout
========================================================= */

.admin-layout {
  min-height: calc(100dvh - 78px);

  display: grid;
  grid-template-columns:
    var(--sidebar-width)
    minmax(0, 1fr);
}

.admin-main {
  min-width: 0;
  padding: var(--space-6);
}