/* ==============================================================================
   DARK CORE DESIGN SYSTEM — Account Center Architecture
   Strict adherence to DESIGN_SYSTEM.md (Sections 1, 2, 3, 4, 6)
   ============================================================================== */

/* ── App Shell & Base Layout ── */
body.account-page {
  min-height: 100vh;
  display: flex;
  background-color: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

/* ── Sidebar (Section 3.2) ── */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--surface);
  border-right: 2px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 200;
  transition: width 350ms cubic-bezier(0.16, 1, 0.3, 1), transform 350ms cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
  will-change: width;
}

.sidebar-header {
  padding: 10px 16px;
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  height: var(--topbar-h);
  box-sizing: border-box;
}

.sidebar .logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  user-select: none;
}

.sidebar .logo-icon {
  width: 32px;
  height: 32px;
  background: var(--surface-alt);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 15px;
  flex-shrink: 0;
}

.sidebar .logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  white-space: nowrap;
}

.sidebar .logo-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.sidebar .logo-sub {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 10px;
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  transition: color var(--t), background var(--t), border-color var(--t);
  white-space: nowrap;
  position: relative;
  text-decoration: none;
  cursor: pointer;
  background: transparent;
  width: 100%;
  text-align: left;
}

.nav-item:hover {
  color: var(--text);
  background: var(--surface-alt);
}

.nav-item.active {
  color: var(--nav-active-text);
  background: var(--nav-active-bg);
  border-color: var(--nav-active-border);
  font-weight: 600;
}

.nav-item.active .nav-icon {
  color: var(--nav-active-accent);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: -2px;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: var(--nav-active-accent);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--nav-active-accent);
}

.sidebar .nav-icon {
  width: 18px;
  text-align: center;
  font-size: 14px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), color var(--t);
}

.sidebar-divider {
  height: 1px;
  background: var(--border);
  margin: 8px 4px;
}

.sidebar-footer {
  padding: 10px;
  border-top: 2px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.btn-sidebar-collapse {
  width: 100%;
}

/* ── Свернутое состояние сайдбара (Desktop: 64px) ── */
body.sidebar-collapsed .sidebar {
  width: 64px;
  overflow: visible !important;
}

body.sidebar-collapsed .sidebar .sidebar-nav {
  overflow: visible !important;
}

body.sidebar-collapsed .sidebar .logo-text,
body.sidebar-collapsed .sidebar .nav-label {
  opacity: 0 !important;
  pointer-events: none !important;
  transform: translateX(-10px) scale(0.95) !important;
  position: absolute !important;
  visibility: hidden !important;
  transition: opacity 140ms ease, transform 140ms ease !important;
}

body.sidebar-collapsed .sidebar-header {
  padding: 10px 12px;
  justify-content: center !important;
}

body.sidebar-collapsed .sidebar .logo {
  justify-content: center;
}

body.sidebar-collapsed .sidebar .nav-item {
  justify-content: center;
  padding: 10px;
}

body.sidebar-collapsed .sidebar .nav-item:hover .nav-icon {
  transform: scale(1.2);
}

body.sidebar-collapsed .layout-main {
  margin-left: 64px;
}

/* Pure-CSS Тултип для свернутого сайдбара */
body.sidebar-collapsed .sidebar .nav-item::after {
  content: attr(aria-label);
  position: absolute;
  left: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--surface);
  border: 1px solid var(--border-hover);
  color: var(--text);
  padding: 5px 10px;
  border-radius: var(--radius);
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 150ms ease, transform 150ms ease;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  z-index: 300;
}

body.sidebar-collapsed .sidebar .nav-item:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(2px);
}

/* ── Layout Main & Topbar (Section 3.1) ── */
.layout-main {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-width: 0;
  transition: margin-left 350ms cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  z-index: 1;
}

.topbar {
  position: sticky;
  top: 0;
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 100;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.hamburger {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  padding: 4px;
}

.hamburger:hover {
  color: var(--text);
}

.topbar-page-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.topbar-page-title span.crumb-dim {
  color: var(--text-muted);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ── Content Container (Section 3.1 & 4.4) ── */
.content {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 28px 24px 48px;
  box-sizing: border-box;
}

.section {
  margin-bottom: 24px;
}

.section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ── Card Specification (4.4) ── */
.card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color var(--t), box-shadow var(--t);
  position: relative;
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.4);
}

.card-header {
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.card-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
}

.card-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
  text-transform: none;
  font-weight: 400;
  letter-spacing: normal;
}

/* ── Stats Grid (Section 4.4 stat-card) ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  transition: border-color var(--t), box-shadow var(--t);
  position: relative;
}

.stat-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.4);
}

.stat-icon {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stat-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.1;
  word-break: break-all;
}

.stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ── Profile Header Section (Section 4.8) ── */
.profile-header-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 20px;
  position: relative;
}

.profile-avatar-container {
  position: relative;
  width: 72px;
  height: 72px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--surface-alt);
  overflow: hidden;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
  box-sizing: border-box;
}

.profile-avatar-container img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.avatar-upload-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 8, 8, 0.7);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  opacity: 0;
  cursor: pointer;
  color: #fff;
  font-size: 10px;
  font-weight: 600;
  transition: opacity var(--t);
  border-radius: var(--radius);
}

.profile-avatar-container:hover .avatar-upload-overlay {
  opacity: 1;
}

.profile-details {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.profile-name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  line-height: 1.2;
}

.profile-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-muted);
}

.profile-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

/* ── Ecosystem Apps Grid (Launcher) ── */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 14px;
}

.app-card {
  background: var(--surface-alt);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--t), transform var(--t), background var(--t);
}

.app-card:hover {
  border-color: var(--border-hover);
  background: var(--surface-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}

.app-card-top {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.app-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--accent);
  flex-shrink: 0;
}

.app-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}

.app-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 3px;
  line-height: 1.35;
}

.app-link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

/* ── Form Controls & Grid (Section 4.2) ── */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full {
  grid-column: span 2;
}

.form-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.input {
  width: 100%;
  height: 40px;
  padding: 0 14px;
  background: var(--surface-alt);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--t);
  box-sizing: border-box;
}

.input:focus {
  border-color: var(--border-hover);
}

.input::placeholder {
  color: var(--text-muted);
}

.input:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  background: var(--surface);
  border-color: var(--border);
  color: var(--text-muted);
}

.input-with-action {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.input-with-action .input {
  padding-right: 42px;
}

.input-action-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  border-radius: calc(var(--radius) - 2px);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  transition: color var(--t), background var(--t);
}

.input-action-btn:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.form-hint {
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
}

.form-hint i {
  font-size: 12px;
}

.form-hint.hint-warning {
  color: var(--amber);
}

/* ── Connected Accounts & Sessions Row Items ── */
.security-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--surface-alt);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  gap: 14px;
}

.security-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.security-left i.row-icon {
  font-size: 20px;
  color: var(--text-muted);
  width: 24px;
  text-align: center;
}

.security-details h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.security-details p {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.session-device-badge {
  font-size: 10px;
  padding: 2px 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text-muted);
  font-weight: 600;
}

/* Mobile Sidebar Overlay */
.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  z-index: 150;
  display: none;
}

/* ── Responsive Breakpoints (Section 6) ── */
@media (max-width: 990px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .sidebar {
    transform: translateX(-100%);
    width: 240px !important;
  }

  .sidebar.mobile-open {
    transform: translateX(0);
  }

  .sidebar-overlay.active {
    display: block;
  }

  .layout-main {
    margin-left: 0 !important;
  }

  .hamburger {
    display: inline-flex;
  }

  .btn-sidebar-collapse {
    display: none !important;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-group.full {
    grid-column: span 1;
  }

  .security-row {
    flex-direction: column;
    align-items: flex-start;
  }
}