:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-card: #1a1f2e;
  --bg-elevated: #232936;
  --text-primary: #f3f4f6;
  --text-secondary: #d1d5db;
  --text-tertiary: #9ca3af;
  --text-muted: #6b7280;
  --accent-primary: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: #60a5fa;
  --status-success: #10b981;
  --status-warning: #f59e0b;
  --status-danger: #ef4444;
  --status-info: #06b6d4;
  --color-long: #10b981;
  --color-short: #ef4444;
  --color-neutral: #6b7280;
  --regime-trend-up: #10b981;
  --regime-trend-down: #ef4444;
  --regime-balance: #f59e0b;
  --regime-discovery: #a855f7;
  --border-default: #374151;
  --border-light: #1f2937;
  --border-accent: #3b82f6;
  --border-warning: #f59e0b;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", monospace;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.5);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
}

a {
  color: var(--accent-light);
  text-decoration: none;
}

a:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

/* ============================================================
   CONTAINER
   ============================================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container-sm {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container-md {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* ============================================================
   CARD
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
}

.card + .card {
  margin-top: var(--space-4);
}

.card-collapsed {
  padding: var(--space-4) var(--space-6);
}

.card-collapsed .card-body {
  display: none;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-light);
}

.card-header h2,
.card-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--space-4) 0;
}

.card-subtitle {
  font-size: 13px;
  color: var(--text-tertiary);
  margin: 0 0 var(--space-4) 0;
}

.card-body {
  /* default shown */
}

.card-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Elevated card variant */
.card-elevated {
  background: var(--bg-elevated);
}

/* Accent border top */
.card-accent-top {
  border-top: 3px solid var(--accent-primary);
}

.card-accent-success {
  border-top: 3px solid var(--status-success);
}

.card-accent-warning {
  border-top: 3px solid var(--status-warning);
}

.card-accent-danger {
  border-top: 3px solid var(--status-danger);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: 14px;
  font-family: var(--font-sans);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.5;
}

.btn:hover {
  text-decoration: none;
}

.btn:disabled,
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

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

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-color: var(--border-default);
}

.btn-secondary:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

.btn-success {
  background: var(--status-success);
  color: #fff;
  border-color: var(--status-success);
}

.btn-success:hover {
  background: #059669;
  border-color: #059669;
  color: #fff;
}

.btn-danger {
  background: var(--status-danger);
  color: #fff;
  border-color: var(--status-danger);
}

.btn-danger:hover {
  background: #dc2626;
  border-color: #dc2626;
  color: #fff;
}

.btn-warning {
  background: var(--status-warning);
  color: #000;
  border-color: var(--status-warning);
}

.btn-warning:hover {
  background: #d97706;
  border-color: #d97706;
}

.btn-ghost {
  background: transparent;
  color: var(--text-tertiary);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-outline {
  background: transparent;
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.btn-outline:hover {
  background: var(--accent-primary);
  color: #fff;
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: 12px;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: 16px;
  border-radius: var(--radius-md);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn-loading {
  position: relative;
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-left: var(--space-2);
}

/* ============================================================
   FORMS
   ============================================================ */
.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.form-label.required::after {
  content: ' *';
  color: var(--status-danger);
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-sans);
  line-height: 1.5;
  transition: border-color 0.15s, box-shadow 0.15s;
  appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

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

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: var(--bg-secondary);
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239ca3af' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 32px;
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.form-error {
  font-size: 12px;
  color: var(--status-danger);
  margin-top: var(--space-1);
}

.form-input.is-invalid,
.form-select.is-invalid,
.form-textarea.is-invalid {
  border-color: var(--status-danger);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

/* ============================================================
   ALERTS
   ============================================================ */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: 14px;
  margin-bottom: var(--space-4);
}

.alert-icon {
  font-size: 16px;
  flex-shrink: 0;
  line-height: 1.5;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
  color: #fcd34d;
}

.alert-danger,
.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.alert-info {
  background: rgba(6, 182, 212, 0.1);
  border-color: rgba(6, 182, 212, 0.3);
  color: #67e8f9;
}

/* ============================================================
   BADGES
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  font-size: 11px;
  font-weight: 600;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  line-height: 1.4;
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--status-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--status-danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--status-warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-info {
  background: rgba(6, 182, 212, 0.15);
  color: var(--status-info);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.badge-neutral {
  background: rgba(107, 114, 128, 0.15);
  color: var(--color-neutral);
  border: 1px solid rgba(107, 114, 128, 0.3);
}

/* Regime badges */
.badge-regime-trend-up {
  background: rgba(16, 185, 129, 0.15);
  color: var(--regime-trend-up);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-regime-trend-down {
  background: rgba(239, 68, 68, 0.15);
  color: var(--regime-trend-down);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-regime-balance {
  background: rgba(245, 158, 11, 0.15);
  color: var(--regime-balance);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-regime-discovery {
  background: rgba(168, 85, 247, 0.15);
  color: var(--regime-discovery);
  border: 1px solid rgba(168, 85, 247, 0.3);
}

/* Building mode badges */
.badge-mode-building {
  background: rgba(6, 182, 212, 0.15);
  color: var(--status-info);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.badge-mode-free {
  background: rgba(16, 185, 129, 0.15);
  color: var(--status-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-mode-stop-day {
  background: rgba(239, 68, 68, 0.15);
  color: var(--status-danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ============================================================
   APP HEADER
   ============================================================ */
.app-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-default);
  height: 56px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.app-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.app-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 16px;
  color: var(--text-primary);
  text-decoration: none;
}

.app-logo:hover {
  color: var(--accent-light);
  text-decoration: none;
}

.app-logo-icon {
  width: 28px;
  height: 28px;
  background: var(--accent-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.app-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.app-user {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  color: var(--text-tertiary);
}

.app-user-avatar {
  width: 28px;
  height: 28px;
  background: var(--bg-tertiary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-light);
  border: 1px solid var(--border-default);
}

/* ============================================================
   APP NAV
   ============================================================ */
.app-nav {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-light);
  overflow-x: auto;
}

.app-nav-inner {
  display: flex;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
  gap: 0;
}

.app-nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-tertiary);
  border-bottom: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}

.app-nav-link:hover {
  color: var(--text-primary);
  text-decoration: none;
  border-bottom-color: var(--border-default);
}

.app-nav-link.active {
  color: var(--accent-light);
  border-bottom-color: var(--accent-primary);
}

/* ============================================================
   PAGE LAYOUT
   ============================================================ */
.page-main {
  padding: var(--space-6) 0;
  min-height: calc(100vh - 56px);
}

.page-header {
  margin-bottom: var(--space-6);
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 var(--space-1) 0;
}

.page-subtitle {
  font-size: 14px;
  color: var(--text-tertiary);
  margin: 0;
}

/* ============================================================
   TOAST NOTIFICATIONS
   ============================================================ */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-lg);
  font-size: 14px;
  max-width: 360px;
  pointer-events: all;
  animation: toastIn 0.2s ease;
}

.toast.toast-removing {
  animation: toastOut 0.2s ease forwards;
}

.toast-icon {
  font-size: 16px;
  flex-shrink: 0;
  line-height: 1.5;
}

.toast-message {
  flex: 1;
  color: var(--text-primary);
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0;
  font-size: 16px;
  line-height: 1;
  flex-shrink: 0;
  transition: color 0.15s;
}

.toast-close:hover {
  color: var(--text-primary);
}

.toast-success {
  border-color: rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.08);
}

.toast-success .toast-icon {
  color: var(--status-success);
}

.toast-error {
  border-color: rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.08);
}

.toast-error .toast-icon {
  color: var(--status-danger);
}

.toast-warning {
  border-color: rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.08);
}

.toast-warning .toast-icon {
  color: var(--status-warning);
}

.toast-info {
  border-color: rgba(6, 182, 212, 0.3);
  background: rgba(6, 182, 212, 0.08);
}

.toast-info .toast-icon {
  color: var(--status-info);
}

/* ============================================================
   TABLE
   ============================================================ */
.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

thead th {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  color: var(--text-tertiary);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-default);
  white-space: nowrap;
}

tbody td {
  padding: var(--space-3);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:hover td {
  background: rgba(255,255,255,0.02);
}

/* ============================================================
   DIVIDER
   ============================================================ */
.divider {
  border: none;
  border-top: 1px solid var(--border-light);
  margin: var(--space-4) 0;
}

/* ============================================================
   LOADING SPINNER
   ============================================================ */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-default);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner-sm {
  width: 14px;
  height: 14px;
  border-width: 2px;
}

.spinner-lg {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

.loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-12);
  color: var(--text-muted);
}

/* ============================================================
   EMPTY STATE
   ============================================================ */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-12) var(--space-6);
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: var(--space-4);
  opacity: 0.4;
}

.empty-state-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-tertiary);
  margin: 0 0 var(--space-2) 0;
}

.empty-state-desc {
  font-size: 13px;
  margin: 0 0 var(--space-4) 0;
}

/* ============================================================
   PROGRESS BAR
   ============================================================ */
.progress {
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--accent-primary);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.progress-bar-success {
  background: var(--status-success);
}

.progress-bar-warning {
  background: var(--status-warning);
}

.progress-bar-danger {
  background: var(--status-danger);
}

/* ============================================================
   STAT CARDS
   ============================================================ */
.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  font-feature-settings: 'tnum';
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: var(--space-1);
}

.stat-change {
  font-size: 12px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 2px;
  margin-top: var(--space-1);
}

.stat-change.positive { color: var(--status-success); }
.stat-change.negative { color: var(--status-danger); }
.stat-change.neutral { color: var(--text-muted); }

/* ============================================================
   R-VALUE DISPLAY
   ============================================================ */
.r-value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13px;
}

.r-value.positive { color: var(--color-long); }
.r-value.negative { color: var(--color-short); }
.r-value.zero { color: var(--text-muted); }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(20px); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.fade-in { animation: fadeIn 0.3s ease; }
.pulse { animation: pulse 2s ease infinite; }

/* ============================================================
   UTILITIES — FLEX
   ============================================================ */
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ============================================================
   UTILITIES — GRID
   ============================================================ */
.grid { display: grid; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }

/* ============================================================
   UTILITIES — TEXT
   ============================================================ */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--status-success); }
.text-danger { color: var(--status-danger); }
.text-warning { color: var(--status-warning); }
.text-info { color: var(--status-info); }
.text-accent { color: var(--accent-light); }
.text-long { color: var(--color-long); }
.text-short { color: var(--color-short); }
.text-xs { font-size: 11px; }
.text-sm { font-size: 12px; }
.text-base { font-size: 14px; }
.text-md { font-size: 15px; }
.text-lg { font-size: 16px; }
.text-xl { font-size: 18px; }
.text-2xl { font-size: 22px; }
.text-3xl { font-size: 28px; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }
.font-mono { font-family: var(--font-mono); }
.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }
.capitalize { text-transform: capitalize; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ============================================================
   UTILITIES — SPACING
   ============================================================ */
.m-0 { margin: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.p-0 { padding: 0; }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.pt-4 { padding-top: var(--space-4); }
.pb-4 { padding-bottom: var(--space-4); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.py-2 { padding-top: var(--space-2); padding-bottom: var(--space-2); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }

/* ============================================================
   UTILITIES — DISPLAY
   ============================================================ */
.hidden { display: none !important; }
.visible { display: block !important; }
.inline { display: inline; }
.inline-flex { display: inline-flex; }
.block { display: block; }
.w-full { width: 100%; }
.h-full { height: 100%; }
.overflow-hidden { overflow: hidden; }
.relative { position: relative; }
.absolute { position: absolute; }
.sticky { position: sticky; }

/* ============================================================
   UTILITIES — BORDER
   ============================================================ */
.border { border: 1px solid var(--border-default); }
.border-top { border-top: 1px solid var(--border-default); }
.border-bottom { border-bottom: 1px solid var(--border-default); }
.rounded { border-radius: var(--radius-md); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: 999px; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .container { padding: 0 var(--space-3); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .app-header-inner { padding: 0 var(--space-3); }
  .page-main { padding: var(--space-4) 0; }
  .toast-container { bottom: var(--space-3); right: var(--space-3); left: var(--space-3); }
  .toast { max-width: 100%; }
}

@media (max-width: 480px) {
  .btn-block-mobile { display: flex; width: 100%; }
}