/* ============================================================
   admin.css – AI Skill Assessment System
   Styles for admin.html (admin management page)
   ============================================================ */

/* ── Full-screen layout ─────────────────────────────────────── */

body.admin-body {
  overflow: hidden;
}

.admin-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ── Sidebar ─────────────────────────────────────────────────── */

.admin-sidebar {
  width: 224px;
  min-width: 224px;
  background: #0f172a;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow-y: auto;
  flex-shrink: 0;
}

/* ── User profile section ───────────────────────────────────── */

.admin-user-profile {
  padding: 16px 12px;
  border-bottom: 1px solid rgba(255,255,255,.07);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: padding var(--transition);
}

.admin-user-avatar {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6D28D9 0%, #4F46E5 100%);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.admin-user-info {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  transition: opacity var(--transition), width var(--transition);
}

.admin-user-name {
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-user-role {
  color: rgba(255,255,255,.4);
  font-size: 11px;
  margin-top: 2px;
  white-space: nowrap;
}

.admin-sidebar-toggle {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(255,255,255,.07);
  border: none;
  color: rgba(255,255,255,.5);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              transform var(--transition);
}

.admin-sidebar-toggle:hover {
  background: rgba(255,255,255,.13);
  color: #fff;
}

/* ── Collapsed state ─────────────────────────────────────────── */

.admin-sidebar.is-collapsed {
  width: 64px;
  min-width: 64px;
  overflow: visible;
}

.admin-sidebar.is-collapsed .admin-user-profile {
  flex-direction: column;
  align-items: center;
  padding: 14px 8px;
  gap: 8px;
}

.admin-sidebar.is-collapsed .admin-user-info {
  display: none;
}

/* 折りたたみ時もトグルボタンは表示 */
.admin-sidebar.is-collapsed .admin-sidebar-toggle {
  display: flex;
}

.admin-sidebar.is-collapsed .admin-nav {
  padding: 12px 8px;
}

.admin-sidebar.is-collapsed .admin-nav-btn {
  justify-content: center;
  padding: 12px 0;
}

.admin-sidebar.is-collapsed .nav-label {
  display: none;
}

.admin-sidebar.is-collapsed .admin-back-btn {
  justify-content: center;
  padding: 12px 0;
}

.admin-sidebar.is-collapsed .admin-sidebar-footer {
  padding: 10px 8px;
}

.admin-sidebar-toggle svg {
  transition: transform var(--transition);
}

.admin-sidebar.is-collapsed .admin-sidebar-toggle svg {
  transform: rotate(180deg);
}

/* ── Tooltip (折りたたみ時のホバー表示) ──────────────────────── */

.admin-sidebar.is-collapsed .admin-nav-btn,
.admin-sidebar.is-collapsed .admin-back-btn {
  position: relative;
}

.admin-sidebar.is-collapsed .admin-nav-btn::after,
.admin-sidebar.is-collapsed .admin-back-btn::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  background: #1e293b;
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 7px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
  box-shadow: 0 4px 14px rgba(0,0,0,.35);
  z-index: 300;
}

.admin-sidebar.is-collapsed .admin-nav-btn:hover::after,
.admin-sidebar.is-collapsed .admin-back-btn:hover::after {
  opacity: 1;
}

/* ── Sidebar nav ─────────────────────────────────────────────── */

.admin-nav {
  flex: 1;
  padding: 12px 10px;
}

.admin-nav-list {
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.admin-nav-item {
  padding: 0;
}

.admin-nav-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 11px 14px;
  background: transparent;
  border: none;
  border-radius: 10px;
  color: rgba(255,255,255,.55);
  font-size: 14px;
  font-weight: 400;
  cursor: pointer;
  text-align: left;
  transition: background var(--transition), color var(--transition);
}

.admin-nav-btn:hover {
  background: rgba(255,255,255,.07);
  color: rgba(255,255,255,.9);
}

.admin-nav-btn.active {
  background: #4F46E5;
  color: #fff;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(79,70,229,.4);
}

.admin-nav-btn.active:hover {
  background: #4338CA;
}

.nav-icon {
  flex-shrink: 0;
  display: block;
}

.nav-label {
  white-space: nowrap;
  overflow: hidden;
}

/* ── Sidebar footer ─────────────────────────────────────────── */

.admin-sidebar-footer {
  padding: 10px;
  border-top: 1px solid rgba(255,255,255,.07);
}

.admin-back-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 11px 14px;
  background: transparent;
  border: none;
  border-radius: 10px;
  color: rgba(255,255,255,.4);
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  transition: background var(--transition), color var(--transition);
}

.admin-back-btn:hover {
  background: rgba(255,255,255,.06);
  color: rgba(255,255,255,.75);
}

/* ── Main content area ─────────────────────────────────────── */

.admin-main {
  flex: 1;
  overflow-y: auto;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
}

/* ── Tab content ─────────────────────────────────────────────── */

.admin-tab-content {
  display: none;
  flex: 1;
}

.admin-tab-content.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Coming soon placeholder ─────────────────────────────────── */

.admin-coming-soon {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 60px 32px;
  text-align: center;
}

.admin-coming-soon-icon {
  font-size: 52px;
  display: block;
}

.admin-coming-soon-text {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin: 0;
}

.admin-coming-soon-sub {
  font-size: 13px;
  color: var(--color-text-muted);
  margin: 0;
}

/* ── Auth loading overlay ─────────────────────────────────────── */

.auth-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: var(--color-bg);
}

.auth-loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

/* ── Access denied ─────────────────────────────────────────── */

.access-denied-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: var(--color-bg);
}

.access-denied-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  max-width: 360px;
  width: 90%;
}

.access-denied-icon {
  font-size: 52px;
  display: block;
  margin-bottom: 20px;
}

.access-denied-card p {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
  line-height: 1.6;
}

.btn-back-home {
  background: var(--color-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  padding: 11px 28px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background var(--transition);
}

.btn-back-home:hover {
  background: var(--color-primary-hover);
}