/* ============================================================================
   KEYVORY LAYOUT
   Shell · Topbar · Main · Right Sheet · Command Palette · Mobile · Auth
   ============================================================================ */

/* 1. SHELL */
.kv-shell { display: flex; flex-direction: column; min-height: 100vh; }

/* 2. TOP BAR */
.kv-topbar {
  position: sticky; top: 0; z-index: var(--kv-z-sticky);
  display: flex; align-items: center; justify-content: space-between;
  height: var(--kv-topbar-h); padding: 0 var(--kv-content-px);
  background-color: var(--kv-surface); border-bottom: 1px solid var(--kv-border);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.kv-topbar-left { display: flex; align-items: center; gap: var(--kv-sp-6); }
.kv-topbar-logo {
  font-size: var(--kv-text-sm); font-weight: var(--kv-weight-bold);
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--kv-text-primary); flex-shrink: 0;
}
.kv-topbar-nav { display: flex; align-items: center; gap: var(--kv-sp-2); }
.kv-topbar-link {
  display: flex; align-items: center; gap: var(--kv-sp-2);
  padding: var(--kv-sp-2) var(--kv-sp-3); font-size: var(--kv-text-sm);
  font-weight: var(--kv-weight-medium); color: var(--kv-text-secondary);
  border-radius: var(--kv-radius-btn); transition: all var(--kv-duration-fast) var(--kv-ease);
  white-space: nowrap; position: relative;
}
.kv-topbar-link:hover { color: var(--kv-text-primary); background-color: var(--kv-hover-bg); }
.kv-topbar-link.kv-topbar-active { color: var(--kv-text-primary); background-color: var(--kv-raised); }
.kv-topbar-link .material-symbols-outlined { font-size: 16px; }
.kv-topbar-right { display: flex; align-items: center; gap: var(--kv-sp-3); }

/* Search trigger */
.kv-search-trigger {
  display: flex; align-items: center; gap: var(--kv-sp-2); padding: 0 var(--kv-sp-3);
  font-size: var(--kv-text-sm); color: var(--kv-text-muted); background-color: var(--kv-canvas);
  border: 1px solid var(--kv-border); border-radius: var(--kv-radius-btn);
  cursor: pointer; transition: all var(--kv-duration-fast) var(--kv-ease);
  min-width: 200px; height: 32px;
}
.kv-search-trigger:hover { border-color: var(--kv-border-strong); color: var(--kv-text-secondary); }
.kv-search-trigger .material-symbols-outlined { font-size: 16px; }
.kv-search-trigger-kbd { margin-left: auto; display: flex; gap: 2px; }

/* Theme toggle */
.kv-theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: var(--kv-radius-btn);
  color: var(--kv-text-secondary); cursor: pointer;
  transition: all var(--kv-duration-fast) var(--kv-ease); flex-shrink: 0;
}
.kv-theme-toggle:hover { background-color: var(--kv-hover-bg); color: var(--kv-text-primary); }
.kv-theme-toggle .material-symbols-outlined { font-size: 18px; }

/* User menu */
.kv-user-menu { position: relative; display: flex; align-items: center; }
.kv-user-trigger {
  display: flex; align-items: center; gap: var(--kv-sp-2); padding: 0 var(--kv-sp-2);
  height: 32px; border-radius: var(--kv-radius-btn); cursor: pointer;
  transition: background-color var(--kv-duration-fast) var(--kv-ease);
}
.kv-user-trigger:hover { background-color: var(--kv-hover-bg); }
.kv-user-name { font-size: var(--kv-text-sm); font-weight: var(--kv-weight-medium); color: var(--kv-text-primary); }

/* 3. HAMBURGER */
.kv-hamburger {
  display: none; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: var(--kv-radius-btn);
  color: var(--kv-text-secondary); cursor: pointer;
}
.kv-hamburger .material-symbols-outlined { font-size: 20px; }

/* 4. MAIN CONTENT */
.kv-main { flex: 1; padding: var(--kv-sp-6) var(--kv-content-px); max-width: var(--kv-content-max); width: 100%; margin: 0 auto; }
.kv-page-header { margin-bottom: var(--kv-sp-6); }
.kv-page-header-row { display: flex; align-items: center; justify-content: space-between; gap: var(--kv-sp-4); }
.kv-page-title { font-size: var(--kv-text-lg); font-weight: var(--kv-weight-bold); color: var(--kv-text-primary); line-height: var(--kv-leading-tight); }
.kv-page-subtitle { font-size: var(--kv-text-sm); color: var(--kv-text-secondary); margin-top: var(--kv-sp-1); }

/* Grid layouts */
.kv-grid { display: grid; gap: var(--kv-sp-4); }
.kv-grid-2 { grid-template-columns: repeat(2, 1fr); }
.kv-grid-3 { grid-template-columns: repeat(3, 1fr); }
.kv-grid-4 { grid-template-columns: repeat(4, 1fr); }
.kv-grid-2-1 { grid-template-columns: 2fr 1fr; }

/* Search input match button height */
.kv-page-header .kv-search .kv-input { height: 32px; min-width: 180px; }

/* 5. RIGHT SHEET */
.kv-sheet-backdrop {
  position: fixed; inset: 0; z-index: calc(var(--kv-z-sheet) - 1);
  background-color: var(--kv-overlay); opacity: 0; pointer-events: none;
  transition: opacity var(--kv-duration-sheet) var(--kv-ease);
}
.kv-sheet-backdrop.kv-sheet-open { opacity: 1; pointer-events: auto; }
.kv-right-sheet {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: var(--kv-z-sheet);
  width: var(--kv-sheet-w); max-width: 100vw; background-color: var(--kv-surface);
  border-left: 1px solid var(--kv-border); box-shadow: var(--kv-shadow-sheet);
  transform: translateX(100%); transition: transform var(--kv-duration-sheet) var(--kv-ease);
  display: flex; flex-direction: column; overflow: hidden;
}
.kv-right-sheet.kv-sheet-open { transform: translateX(0); }
.kv-sheet-header { display: flex; align-items: center; justify-content: space-between; padding: var(--kv-sp-4); border-bottom: 1px solid var(--kv-border); flex-shrink: 0; }
.kv-sheet-title { font-size: var(--kv-text-base); font-weight: var(--kv-weight-semibold); }
.kv-sheet-close { display: flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: var(--kv-radius-btn); color: var(--kv-text-muted); cursor: pointer; transition: all var(--kv-duration-fast) var(--kv-ease); }
.kv-sheet-close:hover { background-color: var(--kv-hover-bg); color: var(--kv-text-primary); }
.kv-sheet-close .material-symbols-outlined { font-size: 18px; }
.kv-sheet-body { flex: 1; overflow-y: auto; padding: var(--kv-sp-4); }
.kv-sheet-section { margin-bottom: var(--kv-sp-6); }
.kv-sheet-section-title { font-size: var(--kv-text-xs); font-weight: var(--kv-weight-medium); color: var(--kv-text-secondary); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: var(--kv-sp-3); }
.kv-sheet-status { display: flex; align-items: center; gap: var(--kv-sp-2); margin-bottom: var(--kv-sp-4); }
.kv-sheet-actions { display: flex; gap: var(--kv-sp-2); padding: var(--kv-sp-4); border-top: 1px solid var(--kv-border); flex-shrink: 0; }

/* History timeline */
.kv-timeline { position: relative; padding-left: var(--kv-sp-5); }
.kv-timeline::before { content: ''; position: absolute; left: 5px; top: 0; bottom: 0; width: 1px; background-color: var(--kv-border); }
.kv-timeline-item { position: relative; padding-bottom: var(--kv-sp-4); }
.kv-timeline-item:last-child { padding-bottom: 0; }
.kv-timeline-dot { position: absolute; left: calc(-1 * var(--kv-sp-5) + 2px); top: 4px; width: 8px; height: 8px; border-radius: var(--kv-radius-full); background-color: var(--kv-border-strong); border: 2px solid var(--kv-surface); }
.kv-timeline-dot-success { background-color: #4ADE80; }
.kv-timeline-dot-error { background-color: #F87171; }
.kv-timeline-dot-warning { background-color: #FBBF24; }
.kv-timeline-dot-info { background-color: #60A5FA; }
.kv-timeline-date { font-size: var(--kv-text-xs); color: var(--kv-text-muted); margin-bottom: var(--kv-sp-1); }
.kv-timeline-content { font-size: var(--kv-text-sm); color: var(--kv-text-primary); }
.kv-timeline-detail { font-size: var(--kv-text-xs); color: var(--kv-text-secondary); margin-top: var(--kv-sp-1); font-family: var(--kv-font-mono); }
.kv-device-item { display: flex; align-items: center; justify-content: space-between; padding: var(--kv-sp-3); background-color: var(--kv-raised); border: 1px solid var(--kv-border); border-radius: var(--kv-radius-card); margin-bottom: var(--kv-sp-2); }
.kv-device-id { font-family: var(--kv-font-mono); font-size: var(--kv-text-xs); color: var(--kv-text-primary); word-break: break-all; }
.kv-device-meta { font-size: var(--kv-text-xs); color: var(--kv-text-muted); margin-top: var(--kv-sp-1); }

/* 6. COMMAND PALETTE */
.kv-command-overlay { position: fixed; inset: 0; z-index: var(--kv-z-command); display: flex; align-items: flex-start; justify-content: center; padding-top: 20vh; background-color: var(--kv-overlay); opacity: 0; pointer-events: none; transition: opacity var(--kv-duration-fast) var(--kv-ease); }
.kv-command-overlay.kv-command-open { opacity: 1; pointer-events: auto; }
.kv-command-palette { width: 100%; max-width: 560px; background-color: var(--kv-surface); border: 1px solid var(--kv-border); border-radius: var(--kv-radius-modal); box-shadow: var(--kv-shadow-4); overflow: hidden; transform: scale(0.96) translateY(-8px); transition: transform var(--kv-duration-normal) var(--kv-ease); }
.kv-command-overlay.kv-command-open .kv-command-palette { transform: scale(1) translateY(0); }
.kv-command-input-wrapper { display: flex; align-items: center; gap: var(--kv-sp-3); padding: var(--kv-sp-3) var(--kv-sp-4); border-bottom: 1px solid var(--kv-border); }
.kv-command-input-icon { color: var(--kv-text-muted); font-size: 20px; flex-shrink: 0; }
.kv-command-input { flex: 1; font-size: var(--kv-text-md); font-weight: var(--kv-weight-normal); color: var(--kv-text-primary); background: none; border: none; outline: none; }
.kv-command-input::placeholder { color: var(--kv-text-muted); }
.kv-command-results { max-height: 320px; overflow-y: auto; padding: var(--kv-sp-2); }
.kv-command-group-label { padding: var(--kv-sp-2) var(--kv-sp-3); font-size: var(--kv-text-xs); font-weight: var(--kv-weight-medium); color: var(--kv-text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.kv-command-item { display: flex; align-items: center; gap: var(--kv-sp-3); padding: var(--kv-sp-2) var(--kv-sp-3); border-radius: var(--kv-radius-btn); cursor: pointer; transition: background-color var(--kv-duration-fast) var(--kv-ease); }
.kv-command-item:hover, .kv-command-item.kv-command-active { background-color: var(--kv-hover-bg); }
.kv-command-item-icon { font-size: 16px; color: var(--kv-text-muted); flex-shrink: 0; width: 20px; text-align: center; }
.kv-command-item-text { flex: 1; font-size: var(--kv-text-sm); color: var(--kv-text-primary); }
.kv-command-item-hint { font-size: var(--kv-text-xs); color: var(--kv-text-muted); }
.kv-command-footer { display: flex; align-items: center; gap: var(--kv-sp-4); padding: var(--kv-sp-2) var(--kv-sp-4); border-top: 1px solid var(--kv-border); font-size: var(--kv-text-xs); color: var(--kv-text-muted); }
.kv-command-footer-hint { display: flex; align-items: center; gap: var(--kv-sp-1); }
.kv-command-empty { padding: var(--kv-sp-8) var(--kv-sp-4); text-align: center; font-size: var(--kv-text-sm); color: var(--kv-text-muted); }

/* 7. MOBILE BOTTOM NAV */
.kv-mobile-nav { display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: var(--kv-z-sticky); height: var(--kv-mobile-nav-h); background-color: var(--kv-surface); border-top: 1px solid var(--kv-border); padding: 0 var(--kv-sp-4); padding-bottom: env(safe-area-inset-bottom, 0); }
.kv-mobile-nav-inner { display: flex; align-items: center; justify-content: space-around; height: 100%; }
.kv-mobile-nav-item { display: flex; flex-direction: column; align-items: center; gap: var(--kv-sp-1); padding: var(--kv-sp-2) var(--kv-sp-3); font-size: 10px; font-weight: var(--kv-weight-medium); color: var(--kv-text-muted); border-radius: var(--kv-radius-btn); transition: color var(--kv-duration-fast) var(--kv-ease); text-decoration: none; }
.kv-mobile-nav-item:hover, .kv-mobile-nav-item.kv-mobile-nav-active { color: var(--kv-text-primary); }
.kv-mobile-nav-item .material-symbols-outlined { font-size: 20px; }

/* 8. AUTH PAGES */
.kv-auth-layout { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 100vh; padding: var(--kv-sp-4); }
.kv-auth-card { width: 100%; max-width: 380px; background-color: var(--kv-surface); border: 1px solid var(--kv-border); border-radius: var(--kv-radius-modal); box-shadow: var(--kv-shadow-3); padding: var(--kv-sp-8); }
.kv-auth-icon { display: flex; align-items: center; justify-content: center; width: 48px; height: 48px; margin: 0 auto var(--kv-sp-6); background-color: var(--kv-raised); border: 1px solid var(--kv-border); border-radius: var(--kv-radius-card); }
.kv-auth-icon .material-symbols-outlined { font-size: 24px; color: var(--kv-text-primary); }
.kv-auth-title { font-size: var(--kv-text-lg); font-weight: var(--kv-weight-bold); text-align: center; margin-bottom: var(--kv-sp-2); }
.kv-auth-subtitle { font-size: var(--kv-text-sm); color: var(--kv-text-secondary); text-align: center; margin-bottom: var(--kv-sp-6); }
.kv-auth-footer { text-align: center; margin-top: var(--kv-sp-6); font-size: var(--kv-text-xs); color: var(--kv-text-muted); letter-spacing: 0.04em; text-transform: uppercase; }
.kv-error-code { font-size: 64px; font-weight: var(--kv-weight-bold); color: var(--kv-text-muted); text-align: center; line-height: 1; margin-bottom: var(--kv-sp-4); font-variant-numeric: tabular-nums; }
.kv-error-title { font-size: var(--kv-text-md); font-weight: var(--kv-weight-semibold); text-align: center; margin-bottom: var(--kv-sp-2); }
.kv-error-desc { font-size: var(--kv-text-sm); color: var(--kv-text-secondary); text-align: center; margin-bottom: var(--kv-sp-6); }

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */

/* Tablet (1024px and below) */
@media (max-width: 1024px) {
  .kv-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .kv-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .kv-grid-2-1 { grid-template-columns: 1fr; }
}

/* Mobile (768px and below) */
@media (max-width: 768px) {
  :root { --kv-content-px: var(--kv-sp-4); --kv-sheet-w: 100vw; }

  /* Topbar */
  .kv-topbar-nav { display: none; position: fixed; top: var(--kv-topbar-h); left: 0; right: 0; background-color: var(--kv-surface); border-bottom: 1px solid var(--kv-border); padding: var(--kv-sp-3) var(--kv-content-px); z-index: var(--kv-z-sticky); flex-direction: column; gap: var(--kv-sp-1); box-shadow: var(--kv-shadow-3); max-height: calc(100vh - var(--kv-topbar-h)); overflow-y: auto; }
  .kv-topbar-nav.kv-topbar-nav-mobile-open { display: flex; }
  .kv-hamburger { display: flex; }
  .kv-search-trigger { display: none; }
  .kv-theme-toggle { display: none; }
  .kv-user-name { display: none; }
  .kv-user-trigger { padding: 0; width: 32px; height: 32px; justify-content: center; }
  .kv-user-menu .kv-dropdown { position: static; }

  /* Layout */
  .kv-mobile-nav { display: block; }
  .kv-main { padding-top: var(--kv-sp-6); padding-bottom: calc(var(--kv-mobile-nav-h) + var(--kv-sp-6)); }
  .kv-right-sheet { width: 100vw; }
  .kv-auth-card { padding: var(--kv-sp-6); }

  /* Grids */
  .kv-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .kv-grid-3 { grid-template-columns: 1fr; }
  .kv-grid-2 { grid-template-columns: 1fr; }
  .kv-grid-2-1 { grid-template-columns: 1fr; }

  /* Tables: horizontal scroll inside cards */
  .kv-table-wrapper { padding: 0 var(--kv-sp-2); -webkit-overflow-scrolling: touch; }
  .kv-table { min-width: 500px; }
  .kv-table th, .kv-table td { padding: var(--kv-sp-2); white-space: nowrap; }

  /* Quick actions: stack vertically */
  .kv-quick-actions .kv-btn { flex: 1; min-width: 0; }

  /* Page headers */
  .kv-page-header-row { flex-direction: column; align-items: flex-start; gap: var(--kv-sp-3); }
  .kv-page-header-row .d-flex { width: 100%; flex-wrap: wrap; }
  .kv-search { width: 100% !important; }
  .kv-search .kv-input { min-width: 0; }

  /* Cards */
  .kv-card-header { flex-wrap: wrap; gap: var(--kv-sp-2); }
  .kv-card-footer { flex-wrap: wrap; }
  .kv-section-header { flex-wrap: wrap; gap: var(--kv-sp-2); }

  /* Tabs */
  .kv-tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; padding: 0 var(--kv-sp-2); gap: var(--kv-sp-1); }
  .kv-tab { padding: var(--kv-sp-2); font-size: var(--kv-text-xs); }

  /* Modals */
  .modal-dialog { padding: var(--kv-sp-2); max-width: calc(100vw - var(--kv-sp-4)); margin: 0 auto; }
  .modal-content { max-width: 100%; }
  .kv-modal-footer { flex-direction: column; }
  .kv-modal-footer .kv-btn { width: 100%; }
  .kv-modal .kv-grid-2, .kv-modal .kv-grid-3 { grid-template-columns: 1fr; }

  /* Other */
  .kv-profile-header { flex-direction: column; text-align: center; }
  .kv-toast-container { bottom: calc(var(--kv-mobile-nav-h) + var(--kv-sp-2)); }
  .kv-bulk-bar { flex-wrap: wrap; gap: var(--kv-sp-2); }
  .kv-meta-row { flex-direction: column; gap: var(--kv-sp-1); }
  .kv-meta-value { text-align: left; }
}

/* Very small screens (480px and below) */
@media (max-width: 480px) {
  .kv-grid-4 { grid-template-columns: 1fr; }
  .kv-stat { padding: var(--kv-sp-3); }
  .kv-stat-value { font-size: var(--kv-text-lg); }
  .kv-page-title { font-size: var(--kv-text-md); }
  .kv-auth-card { padding: var(--kv-sp-4); }
  .kv-topbar { padding: 0 var(--kv-sp-2); }
  .kv-main { padding-left: var(--kv-sp-2); padding-right: var(--kv-sp-2); }
  .kv-card-body { padding: var(--kv-sp-3); }
  .kv-card-header { padding: var(--kv-sp-3); }
  .kv-meta-box { padding: var(--kv-sp-3); }
}



/* Desktop: hide mobile nav */
@media (min-width: 769px) {
  .kv-mobile-nav { display: none !important; }
}

/* ==========================================================================
   UTILITY & COMPONENTS
   ========================================================================== */

/* Page transitions */
.kv-page-enter { animation: kv-reveal var(--kv-duration-page) var(--kv-ease) both; }

/* Quick actions */
.kv-quick-actions { display: flex; flex-direction: column; gap: var(--kv-sp-3); }

/* Section heading */
.kv-section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--kv-sp-4); }
.kv-section-title { font-size: var(--kv-text-sm); font-weight: var(--kv-weight-semibold); color: var(--kv-text-primary); }

/* Toolbar */
.kv-toolbar { display: flex; align-items: center; gap: var(--kv-sp-3); margin-bottom: var(--kv-sp-4); flex-wrap: wrap; }
.kv-toolbar-spacer { flex: 1; }

/* Bulk action bar */
.kv-bulk-bar { display: flex; align-items: center; gap: var(--kv-sp-3); padding: var(--kv-sp-2) var(--kv-sp-4); background-color: var(--kv-raised); border: 1px solid var(--kv-border); border-radius: var(--kv-radius-card); margin-bottom: var(--kv-sp-4); animation: kv-reveal var(--kv-duration-normal) var(--kv-ease) both; }
.kv-bulk-count { font-size: var(--kv-text-sm); font-weight: var(--kv-weight-medium); color: var(--kv-text-primary); }

/* Profile page */
.kv-profile-header { display: flex; align-items: center; gap: var(--kv-sp-4); margin-bottom: var(--kv-sp-6); }
.kv-profile-avatar { width: 64px; height: 64px; border-radius: var(--kv-radius-full); background-color: var(--kv-raised); border: 2px solid var(--kv-border); display: flex; align-items: center; justify-content: center; font-size: var(--kv-text-xl); font-weight: var(--kv-weight-bold); color: var(--kv-text-primary); }
.kv-profile-info { flex: 1; }
.kv-profile-name { font-size: var(--kv-text-lg); font-weight: var(--kv-weight-bold); }
.kv-profile-role { font-size: var(--kv-text-sm); color: var(--kv-text-secondary); text-transform: capitalize; }