/* ==========================================================================
   PORTFOLIO PWA DESIGN SYSTEM
   3-Tier Architecture: Tokens -> App Shell -> Core UI Components
   ========================================================================== */

/* --------------------------------------------------------------------------
   TIER 1: DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Primary & Accents */
  --primary: #8ab4f8;
  --primary-hover: #aecbfa;
  --primary-container: #173254;
  --on-primary-container: #d2e3fc;

  /* Surfaces & Backgrounds */
  --background: #121316;
  --surface: #1e1f23;
  --surface-variant: #282a30;
  --surface-elevated: #25272c;
  --on-background: #e8eaed;
  --on-surface: #e8eaed;
  --outline: #383a42;
  --outline-light: #2a2c33;
  --text-muted: #9aa0a6;
  --text-subtle: #70757a;

  /* Semantics (Gain / Loss / Neutral) */
  --positive: #81c995;
  --positive-bg: rgba(129, 201, 149, 0.12);
  --positive-border: rgba(129, 201, 149, 0.28);

  --negative: #f28b82;
  --negative-bg: rgba(242, 139, 130, 0.12);
  --negative-border: rgba(242, 139, 130, 0.28);

  --neutral: #9aa0a6;
  --neutral-bg: rgba(154, 160, 166, 0.12);
  --neutral-border: rgba(154, 160, 166, 0.25);

  /* Geometry & Elevation */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);

  /* Hero & Custom Accents */
  --color-white: #ffffff;
  --hero-border: #2a4773;
  --hero-bg-gradient: linear-gradient(135deg, #172136 0%, #1e1f23 100%);
}

/* Enable smooth cross-document view transitions in supporting browsers */
@view-transition {
  navigation: auto;
}

/* --------------------------------------------------------------------------
   TIER 2: RESET & APP SHELL LAYOUT
   -------------------------------------------------------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--background);
  color: var(--on-background);
  line-height: 1.4;
  padding-bottom: calc(env(safe-area-inset-bottom, 0px) + 24px);
  min-height: 100vh;
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
}

/* Top App Bar */
.app-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--surface);
  border-bottom: 1px solid var(--outline);
  padding: calc(env(safe-area-inset-top, 0px) + 10px) 16px 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
}

.app-title-group {
  display: flex;
  flex-direction: column;
}

.app-title {
  font-family: 'Google Sans', 'Roboto', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--on-background);
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.app-logo {
  width: 24px;
  height: 24px;
  border-radius: 6px;
}

.app-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--positive);
}

.status-dot.syncing {
  background-color: var(--primary);
  animation: pulse 1s infinite alternate;
}

.status-dot.offline {
  background-color: #fbbc04;
}

@keyframes pulse {
  0% { opacity: 0.3; transform: scale(0.85); }
  100% { opacity: 1; transform: scale(1.15); }
}

.app-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-icon {
  background: none;
  border: 1px solid var(--outline);
  border-radius: var(--radius-full);
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--on-surface);
  background-color: var(--surface-variant);
  text-decoration: none;
  transition: background-color 0.15s, border-color 0.15s, transform 0.15s;
}

.btn-icon:hover {
  background-color: #353840;
  border-color: var(--primary);
}

.btn-icon:active {
  transform: scale(0.95);
}

.btn-icon-highlight {
  background-color: var(--primary-container);
  border-color: var(--primary);
  color: var(--on-primary-container);
}

.btn-icon-highlight:hover {
  background-color: #1e3f6b;
  border-color: var(--primary-hover);
}

.btn-icon.spinning svg {
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  100% { transform: rotate(360deg); }
}

/* Main Container */
.container {
  max-width: 1024px;
  margin: 0 auto;
  padding: 16px;
}

/* Navigation Tabs */
.tabs-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 12px;
  margin-bottom: 8px;
  scrollbar-width: none;
}

.tabs-nav::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  background-color: var(--surface);
  border: 1px solid var(--outline);
  color: var(--text-muted);
  padding: 8px 18px;
  min-height: 44px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.tab-btn:hover {
  border-color: var(--primary);
  color: var(--on-background);
}

.tab-btn.active {
  background-color: var(--primary-container);
  color: var(--on-primary-container);
  border-color: var(--primary);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   TIER 3: CORE UI WIDGETS & CARDS
   -------------------------------------------------------------------------- */

/* KPI Summary Cards Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

@media (min-width: 600px) {
  .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .kpi-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

.card {
  background-color: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--outline);
  padding: 16px;
  box-shadow: var(--shadow-sm);
}

.card-hero {
  background: linear-gradient(135deg, #172136 0%, #1e1f23 100%);
  border: 1px solid #2a4773;
}

.card-header-sm {
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-val-hero {
  font-family: 'Google Sans', sans-serif;
  font-size: 1.85rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.card-val {
  font-family: 'Google Sans', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--on-background);
  margin-bottom: 8px;
}

/* Semantic Status & Change Pills */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 600;
}

.pill.positive {
  background-color: var(--positive-bg);
  color: var(--positive);
  border: 1px solid var(--positive-border);
}

.pill.negative {
  background-color: var(--negative-bg);
  color: var(--negative);
  border: 1px solid var(--negative-border);
}

.pill.neutral {
  background-color: var(--neutral-bg);
  color: var(--neutral);
  border: 1px solid var(--neutral-border);
}

.kpi-subtext {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Section Styling */
.section-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 16px 0 12px 0;
}

.section-title {
  font-family: 'Google Sans', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--on-background);
}

.badge-count {
  background-color: var(--surface-variant);
  border: 1px solid var(--outline);
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* Breakdown Grid */
.breakdown-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 680px) {
  .breakdown-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.item-card {
  background-color: var(--surface);
  border: 1px solid var(--outline);
  border-radius: var(--radius-md);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s;
}

.item-card:hover {
  border-color: #4a4d56;
}

.item-card.is-link,
a.item-card {
  text-decoration: none;
  color: inherit;
  display: flex;
}

.item-card-empty {
  text-align: center;
  padding: 28px 16px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.item-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}

.item-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--on-background);
}

.item-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.item-val {
  font-family: 'Google Sans', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  text-align: right;
  color: var(--on-background);
}

.metrics-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 8px;
  border-top: 1px solid var(--outline-light);
}

.metric-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.metric-group-right,
.metric-group.align-end {
  text-align: right;
  align-items: flex-end;
}

.metric-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  color: var(--text-subtle);
  font-weight: 500;
}

.ticker-badge {
  display: inline-block;
  font-weight: 700;
  background-color: #2e3037;
  color: var(--primary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.75rem;
  margin-right: 6px;
  border: 1px solid var(--outline);
}

/* Search Bar */
.search-bar {
  margin-bottom: 12px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 10px 14px 10px 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--outline);
  background-color: var(--surface);
  color: var(--on-background);
  font-size: 0.88rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-container);
}

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

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Skeleton Loading State */
.skeleton {
  background: linear-gradient(90deg, #1e1f23 25%, #2a2c33 50%, #1e1f23 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-card {
  height: 90px;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
}

.skeleton-card-sm {
  height: 90px;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
}

.skeleton-card-md {
  height: 100px;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
}

.skeleton-card-lg {
  height: 120px;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
}

.skeleton-card-hero {
  height: 180px;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
}

.skeleton-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

/* State Views (Access Denied, Setup, & Errors) */
.state-view {
  text-align: center;
  padding: 36px 20px;
  background-color: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--outline);
  margin-top: 16px;
}

.state-icon {
  font-size: 2.8rem;
  margin-bottom: 12px;
}

.state-title {
  font-family: 'Google Sans', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--on-background);
  margin-bottom: 8px;
}

.state-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  max-width: 460px;
  margin: 0 auto 16px auto;
  line-height: 1.5;
}

/* Buttons */
.btn-primary {
  background-color: var(--primary);
  color: #121316;
  border: none;
  border-radius: var(--radius-full);
  padding: 10px 24px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-decoration: none;
  transition: background-color 0.15s, transform 0.15s;
}

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

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: none;
  border: 1px solid var(--outline);
  color: var(--on-surface);
  border-radius: var(--radius-full);
  padding: 8px 18px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-left: 8px;
  transition: background-color 0.15s;
}

.btn-secondary:hover {
  background-color: var(--surface-variant);
}

.btn-danger {
  color: var(--negative) !important;
  border-color: var(--negative-border) !important;
}

.btn-danger:hover {
  background-color: var(--negative-bg) !important;
  border-color: var(--negative) !important;
}

/* Forms & Inputs */
.form-card {
  background-color: var(--surface);
  border: 1px solid var(--outline);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-top: 16px;
}

.section-title-form {
  margin-bottom: 16px;
}

.form-group {
  margin-bottom: 18px;
  text-align: left;
}

.form-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--outline);
  background-color: var(--surface-variant);
  color: var(--on-background);
  font-size: 0.88rem;
  font-family: inherit;
  outline: none;
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-container);
}

.form-help {
  font-size: 0.72rem;
  color: var(--text-subtle);
  margin-top: 4px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 24px;
}

.form-actions-wrap {
  flex-wrap: wrap;
}

/* Feedback Alerts / Notices */
.notice {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  line-height: 1.4;
}

.notice-positive {
  background-color: var(--positive-bg);
  color: var(--positive);
  border: 1px solid var(--positive-border);
}

.notice-negative {
  background-color: var(--negative-bg);
  color: var(--negative);
  border: 1px solid var(--negative-border);
}

/* Diagnostics Card & Rows */
.diag-card {
  margin-top: 16px;
}

.diag-title {
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.diag-row-top {
  border: none !important;
  padding-top: 0 !important;
}

.diag-val {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.diag-val.primary {
  font-weight: 600;
  color: var(--primary);
}

.diag-val.strong {
  font-weight: 600;
  color: var(--on-background);
}

/* App Footer */
.app-footer {
  text-align: center;
  padding: 28px 16px 20px 16px;
  font-size: 0.75rem;
  color: var(--text-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.footer-line {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-user {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.app-footer #appVersionBadge {
  background-color: var(--surface);
  border: 1px solid var(--outline);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 600;
  color: var(--primary);
}

/* Utilities */
.hidden {
  display: none !important;
}

.text-right {
  text-align: right;
}

.text-bold {
  font-weight: 700;
}

.text-semibold {
  font-weight: 600;
}

.text-medium {
  font-weight: 500;
}

.text-white {
  color: var(--color-white);
}

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

.icon-primary {
  color: var(--primary);
}

.w-full {
  width: 100%;
}