/* ============================================================
   Smart Invoice Template (Offline) — App shell & design system
   ============================================================ */

:root {
  --app-bg: #f4f4f5;
  --app-surface: #ffffff;
  --app-border: #e4e4e7;
  --app-text: #18181b;
  --app-muted: #71717a;
  --app-accent: #2563eb;
  --app-accent-hover: #1d4ed8;
  --app-on-accent: #ffffff;
  --app-danger: #dc2626;
  --app-input-bg: #ffffff;
  --app-panel-bg: #f4f4f6;
  --app-accordion-trigger-bg: #fafafa;
  --app-preview-bg: #e8e8ec;
  --app-persist-bg: #eff6ff;
  --app-persist-border: #bfdbfe;
  --app-persist-text: #1e3a5f;
  --app-muted-surface: #fafafa;
  --app-hover: #ececee;
  /* Shell theme tokens (derived from accent) */
  --app-focus-ring: rgba(37, 99, 235, 0.28);
  --app-accent-subtle: rgba(37, 99, 235, 0.08);
  --app-accent-muted-bg: rgba(37, 99, 235, 0.12);
  --app-border-accent: rgba(37, 99, 235, 0.24);
  --app-btn-ghost-accent-hover: rgba(37, 99, 235, 0.07);
  --app-header-logo-1: #1e40af;
  --app-header-logo-2: #2563eb;
  --app-header-logo-border: rgba(37, 99, 235, 0.42);
  --app-logo-icon: #0f172a;
  --app-accordion-expanded-bg: rgba(37, 99, 235, 0.045);
  --app-shell-tint: rgba(37, 99, 235, 0.038);
  --app-shell-tint-strong: rgba(37, 99, 235, 0.065);
  --app-header-tint: rgba(37, 99, 235, 0.035);
  --app-overlay-scrim: rgba(15, 23, 42, 0.48);
  --app-toast-bg: #27272a;
  --app-toast-fg: #fafafa;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --font-ui: system-ui, -apple-system, 'Segoe UI', Roboto, Ubuntu, Cantarell, 'Noto Sans', sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  /* Header + persistence strip; demo build adds top promo banner */
  --app-chrome-height: 140px;
}

body[data-demo-mode='true'] {
  --app-chrome-height: 168px;
}

@media (max-width: 640px) {
  body[data-demo-mode='true'] {
    --app-chrome-height: 212px;
  }
}

/* App shell only — invoice / print stay light (invoice.css) */
[data-app-theme='dark'] {
  --app-bg: #0c0c0f;
  --app-surface: #141418;
  --app-border: #2a2a32;
  --app-text: #ececf1;
  --app-muted: #a1a1aa;
  --app-accent: #60a5fa;
  --app-accent-hover: #93c5fd;
  --app-on-accent: #0c0c0f;
  --app-danger: #f87171;
  --app-input-bg: #1a1a1f;
  --app-panel-bg: #101014;
  --app-accordion-trigger-bg: #18181c;
  --app-preview-bg: #0f0f12;
  --app-persist-bg: #172554;
  --app-persist-border: #1e3a8a;
  --app-persist-text: #dbeafe;
  --app-muted-surface: #1a1a1f;
  --app-hover: #252530;
  --app-focus-ring: rgba(96, 165, 250, 0.35);
  --app-accent-subtle: rgba(96, 165, 250, 0.12);
  --app-accent-muted-bg: rgba(96, 165, 250, 0.18);
  --app-border-accent: rgba(96, 165, 250, 0.38);
  --app-btn-ghost-accent-hover: rgba(96, 165, 250, 0.12);
  --app-header-logo-1: #3b82f6;
  --app-header-logo-2: #60a5fa;
  --app-header-logo-border: rgba(96, 165, 250, 0.5);
  --app-logo-icon: #f8fafc;
  --app-accordion-expanded-bg: rgba(96, 165, 250, 0.08);
  --app-shell-tint: rgba(96, 165, 250, 0.06);
  --app-shell-tint-strong: rgba(96, 165, 250, 0.1);
  --app-header-tint: rgba(96, 165, 250, 0.06);
  --app-overlay-scrim: rgba(0, 0, 0, 0.55);
  --app-toast-bg: #fafafa;
  --app-toast-fg: #18181b;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
}

/* App shell palette — full token sets (invoice document unchanged) */
html[data-app-palette='blue'] {
  --app-accent: #2563eb;
  --app-accent-hover: #1d4ed8;
  --app-persist-bg: #eff6ff;
  --app-persist-border: #93c5fd;
  --app-persist-text: #1e3a5f;
  --app-focus-ring: rgba(37, 99, 235, 0.3);
  --app-accent-subtle: rgba(37, 99, 235, 0.09);
  --app-accent-muted-bg: rgba(37, 99, 235, 0.14);
  --app-border-accent: rgba(37, 99, 235, 0.28);
  --app-btn-ghost-accent-hover: rgba(37, 99, 235, 0.09);
  --app-header-logo-1: #1d4ed8;
  --app-header-logo-2: #2563eb;
  --app-header-logo-border: rgba(37, 99, 235, 0.45);
  --app-accordion-expanded-bg: rgba(37, 99, 235, 0.055);
  --app-shell-tint: rgba(37, 99, 235, 0.045);
  --app-shell-tint-strong: rgba(37, 99, 235, 0.075);
  --app-header-tint: rgba(37, 99, 235, 0.045);
}

html[data-app-palette='green'] {
  --app-accent: #059669;
  --app-accent-hover: #047857;
  --app-persist-bg: #ecfdf5;
  --app-persist-border: #6ee7b7;
  --app-persist-text: #064e3b;
  --app-focus-ring: rgba(5, 150, 105, 0.3);
  --app-accent-subtle: rgba(5, 150, 105, 0.09);
  --app-accent-muted-bg: rgba(5, 150, 105, 0.14);
  --app-border-accent: rgba(5, 150, 105, 0.28);
  --app-btn-ghost-accent-hover: rgba(5, 150, 105, 0.09);
  --app-header-logo-1: #047857;
  --app-header-logo-2: #059669;
  --app-header-logo-border: rgba(5, 150, 105, 0.45);
  --app-accordion-expanded-bg: rgba(5, 150, 105, 0.055);
  --app-shell-tint: rgba(5, 150, 105, 0.045);
  --app-shell-tint-strong: rgba(5, 150, 105, 0.075);
  --app-header-tint: rgba(5, 150, 105, 0.045);
}

html[data-app-palette='gray'] {
  --app-accent: #475569;
  --app-accent-hover: #334155;
  --app-persist-bg: #f1f5f9;
  --app-persist-border: #cbd5e1;
  --app-persist-text: #1e293b;
  --app-focus-ring: rgba(71, 85, 105, 0.32);
  --app-accent-subtle: rgba(71, 85, 105, 0.09);
  --app-accent-muted-bg: rgba(71, 85, 105, 0.14);
  --app-border-accent: rgba(71, 85, 105, 0.3);
  --app-btn-ghost-accent-hover: rgba(71, 85, 105, 0.1);
  --app-header-logo-1: #334155;
  --app-header-logo-2: #475569;
  --app-header-logo-border: rgba(71, 85, 105, 0.45);
  --app-accordion-expanded-bg: rgba(71, 85, 105, 0.055);
  --app-shell-tint: rgba(71, 85, 105, 0.045);
  --app-shell-tint-strong: rgba(71, 85, 105, 0.08);
  --app-header-tint: rgba(71, 85, 105, 0.045);
}

html[data-app-palette='custom'] {
  --app-accent: var(--app-shell-custom-accent, #2563eb);
  --app-accent-hover: var(--app-shell-custom-accent-hover, #1d4ed8);
  --app-persist-bg: #eff6ff;
  --app-persist-border: #bfdbfe;
  --app-persist-text: #1e3a5f;
}

html[data-app-theme='dark'][data-app-palette='blue'] {
  --app-accent: #60a5fa;
  --app-accent-hover: #93c5fd;
  --app-on-accent: #0c0c0f;
  --app-persist-bg: #172554;
  --app-persist-border: #1d4ed8;
  --app-persist-text: #dbeafe;
  --app-focus-ring: rgba(96, 165, 250, 0.38);
  --app-accent-subtle: rgba(96, 165, 250, 0.14);
  --app-accent-muted-bg: rgba(96, 165, 250, 0.2);
  --app-border-accent: rgba(96, 165, 250, 0.42);
  --app-btn-ghost-accent-hover: rgba(96, 165, 250, 0.14);
  --app-header-logo-1: #3b82f6;
  --app-header-logo-2: #60a5fa;
  --app-header-logo-border: rgba(96, 165, 250, 0.55);
  --app-accordion-expanded-bg: rgba(96, 165, 250, 0.1);
  --app-shell-tint: rgba(96, 165, 250, 0.08);
  --app-shell-tint-strong: rgba(96, 165, 250, 0.12);
  --app-header-tint: rgba(96, 165, 250, 0.07);
}

html[data-app-theme='dark'][data-app-palette='green'] {
  --app-accent: #34d399;
  --app-accent-hover: #6ee7b7;
  --app-on-accent: #0c0c0f;
  --app-persist-bg: #064e3b;
  --app-persist-border: #059669;
  --app-persist-text: #d1fae5;
  --app-focus-ring: rgba(52, 211, 153, 0.38);
  --app-accent-subtle: rgba(52, 211, 153, 0.14);
  --app-accent-muted-bg: rgba(52, 211, 153, 0.2);
  --app-border-accent: rgba(52, 211, 153, 0.42);
  --app-btn-ghost-accent-hover: rgba(52, 211, 153, 0.14);
  --app-header-logo-1: #10b981;
  --app-header-logo-2: #34d399;
  --app-header-logo-border: rgba(52, 211, 153, 0.5);
  --app-accordion-expanded-bg: rgba(52, 211, 153, 0.1);
  --app-shell-tint: rgba(52, 211, 153, 0.08);
  --app-shell-tint-strong: rgba(52, 211, 153, 0.12);
  --app-header-tint: rgba(52, 211, 153, 0.07);
}

html[data-app-theme='dark'][data-app-palette='gray'] {
  --app-accent: #94a3b8;
  --app-accent-hover: #cbd5e1;
  --app-on-accent: #0c0c0f;
  --app-persist-bg: #1e293b;
  --app-persist-border: #475569;
  --app-persist-text: #f1f5f9;
  --app-focus-ring: rgba(148, 163, 184, 0.38);
  --app-accent-subtle: rgba(148, 163, 184, 0.14);
  --app-accent-muted-bg: rgba(148, 163, 184, 0.2);
  --app-border-accent: rgba(148, 163, 184, 0.42);
  --app-btn-ghost-accent-hover: rgba(148, 163, 184, 0.14);
  --app-header-logo-1: #64748b;
  --app-header-logo-2: #94a3b8;
  --app-header-logo-border: rgba(148, 163, 184, 0.5);
  --app-accordion-expanded-bg: rgba(148, 163, 184, 0.1);
  --app-shell-tint: rgba(148, 163, 184, 0.08);
  --app-shell-tint-strong: rgba(148, 163, 184, 0.12);
  --app-header-tint: rgba(148, 163, 184, 0.07);
}

html[data-app-theme='dark'][data-app-palette='custom'] {
  --app-accent: var(--app-shell-custom-accent, #60a5fa);
  --app-accent-hover: var(--app-shell-custom-accent-hover, #93c5fd);
  --app-on-accent: #0c0c0f;
  --app-persist-bg: #172554;
  --app-persist-border: #1e3a8a;
  --app-persist-text: #dbeafe;
}

.field__hint--tight {
  margin-top: 0;
  margin-bottom: var(--space-2);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--app-text);
  background: var(--app-bg);
  line-height: 1.5;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ----- Header ----- */

.app-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background:
    linear-gradient(180deg, var(--app-header-tint), var(--app-header-tint)),
    var(--app-surface);
  border-bottom: 1px solid var(--app-border-accent);
  box-shadow: var(--shadow-sm);
}

.app-header__brand {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  min-width: 0;
}

.app-header__logo {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background:
    linear-gradient(145deg, #f8fafc, #e2e8f0);
  flex-shrink: 0;
  box-shadow:
    0 4px 10px rgba(15, 23, 42, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(15, 23, 42, 0.14);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--app-logo-icon);
}

[data-app-theme='dark'] .app-header__logo {
  background:
    linear-gradient(145deg, #1f2937, #111827);
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow:
    0 4px 12px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.app-header__logo-icon {
  display: block;
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.app-header__title {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.app-header__tagline {
  margin: 2px 0 0;
  font-size: var(--text-xs);
  color: var(--app-muted);
}

.app-header__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

/* ----- Persistence notice ----- */

.persistence-banner {
  background: var(--app-persist-bg);
  border-bottom: 1px solid var(--app-border-accent);
  padding: var(--space-3) var(--space-5);
}

.persistence-banner__text {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--app-persist-text);
  max-width: 960px;
  line-height: 1.55;
}

body[data-demo-mode='true'] .persistence-banner {
  padding: 6px var(--space-4);
}

body[data-demo-mode='true'] .persistence-banner__text--demo {
  font-size: 0.7rem;
  line-height: 1.45;
}

body[data-demo-mode='true'] .app-header {
  padding: var(--space-3) var(--space-4);
}

body[data-demo-mode='true'] .panel-scroll {
  padding-top: var(--space-2);
}

body[data-demo-mode='true'] .panel-intro {
  margin-bottom: var(--space-3);
}

/* ----- Toast ----- */

.toast {
  position: fixed;
  bottom: var(--space-5);
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  padding: var(--space-3) var(--space-4);
  background: var(--app-toast-bg);
  color: var(--app-toast-fg);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-md);
  max-width: min(90vw, 420px);
  text-align: center;
  border: 1px solid var(--app-border-accent);
}

/* ----- Help panel ----- */

/* [hidden] must win: a plain display:flex on .help-panel otherwise ignores the hidden attribute in browsers. */
.help-panel[hidden] {
  display: none !important;
}

.help-panel:not([hidden]) {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: var(--app-overlay-scrim);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: var(--space-6) var(--space-4);
  overflow: auto;
}

.help-panel__inner {
  background: var(--app-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  max-width: 520px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--app-border-accent);
}

.help-panel__title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-lg);
}

.help-panel__list {
  margin: 0 0 var(--space-4);
  padding-left: 1.25rem;
  color: var(--app-text);
}
.help-panel__list li {
  margin-bottom: var(--space-2);
}

/* ----- Main layout ----- */

.app-main {
  display: grid;
  grid-template-columns: minmax(340px, min(520px, 46vw)) minmax(280px, 1fr);
  gap: 0;
  align-items: stretch;
  min-height: calc(100vh - var(--app-chrome-height));
}

.control-panel {
  background:
    linear-gradient(180deg, var(--app-shell-tint-strong), var(--app-shell-tint-strong)),
    linear-gradient(180deg, var(--app-shell-tint), var(--app-shell-tint)),
    var(--app-panel-bg);
  border-right: 1px solid var(--app-border-accent);
  max-height: calc(100vh - var(--app-chrome-height));
  overflow: hidden;
  min-width: 0;
}

.panel-scroll {
  max-height: calc(100vh - var(--app-chrome-height));
  overflow-y: auto;
  padding: var(--space-3) var(--space-4) var(--space-5);
  padding-bottom: var(--space-6);
}

.panel-intro {
  margin: 0 0 var(--space-4);
  font-size: var(--text-xs);
  color: var(--app-muted);
  line-height: 1.5;
}

.preview-panel {
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(180deg, var(--app-shell-tint), var(--app-shell-tint)),
    var(--app-preview-bg);
  min-width: 0;
}

.preview-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background:
    linear-gradient(180deg, var(--app-accent-subtle), var(--app-accent-subtle)),
    var(--app-surface);
  border-bottom: 1px solid var(--app-border-accent);
}

.preview-toolbar__label {
  font-weight: 600;
  font-size: var(--text-sm);
}

.preview-toolbar__hint {
  font-size: var(--text-xs);
  color: var(--app-muted);
}

.preview-canvas {
  flex: 1;
  overflow: auto;
  padding: var(--space-3) var(--space-4) var(--space-5);
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

/* Constrains preview width; invoice grows vertically — no fake vertical squish */
.preview-canvas__frame {
  width: 100%;
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.preview-canvas__frame .invoice-root {
  width: 100%;
}

@media (min-width: 1100px) {
  .app-main {
    grid-template-columns: minmax(400px, 520px) minmax(0, 1fr);
  }
}

@media (max-width: 960px) {
  .app-main {
    grid-template-columns: 1fr;
  }
  .control-panel {
    max-height: none;
    border-right: none;
    border-bottom: 1px solid var(--app-border);
  }
  .panel-scroll {
    max-height: none;
  }
  .preview-canvas__frame {
    max-width: 100%;
  }
}

/* ----- Accordion (settings groups) ----- */

.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* ----- App theme toggle (header) ----- */

.theme-toggle {
  gap: var(--space-2);
}

.theme-toggle__icon {
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  box-shadow: inset -0.35em -0.2em 0 0 var(--app-muted);
  background: linear-gradient(90deg, transparent 50%, var(--app-text) 50%);
  opacity: 0.85;
}

.theme-toggle__label {
  font-size: var(--text-xs);
  font-weight: 500;
}

[data-app-theme='dark'] .theme-toggle__icon {
  box-shadow: inset 0.5em 0.15em 0 -0.15em #fbbf24;
  background: transparent;
}

.accordion__section {
  border: 1px solid var(--app-border-accent);
  border-radius: var(--radius-lg);
  background: var(--app-surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.accordion__section--emphasis {
  border-color: var(--app-border-accent);
  box-shadow: 0 1px 3px var(--app-accent-subtle);
}

.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  margin: 0;
  font: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--app-text);
  text-align: left;
  background: var(--app-accordion-trigger-bg);
  border: none;
  border-bottom: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease;
}

.accordion__trigger:hover {
  background: var(--app-accent-muted-bg);
  filter: none;
}

[data-app-theme='dark'] .accordion__trigger:hover {
  filter: none;
}

.accordion__trigger[aria-expanded='true'] {
  background: var(--app-accordion-expanded-bg);
  border-bottom-color: var(--app-border-accent);
  color: var(--app-text);
}

.accordion__title {
  flex: 1;
  letter-spacing: -0.01em;
}

.accordion__chevron {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--app-muted);
}

.accordion__chevron::before {
  content: '';
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.2s ease;
}

.accordion__trigger[aria-expanded='true'] .accordion__chevron::before {
  transform: rotate(45deg);
}

.accordion__panel[hidden] {
  display: none !important;
}

.accordion__panel {
  background: var(--app-surface);
}

.accordion__inner {
  padding: var(--space-4);
}

.accordion__inner--flush {
  padding: var(--space-3);
}

.accordion__hint {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  color: var(--app-muted);
  line-height: 1.45;
}

.accordion__subheading {
  margin: var(--space-3) 0 var(--space-2);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--app-muted);
}

.accordion__subheading:first-child {
  margin-top: 0;
}

.card__subtitle--tight {
  margin-top: 0;
}

/* ----- Cards & fields ----- */

.card {
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.card__title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--app-muted);
}

.card__subtitle {
  margin: calc(-1 * var(--space-2)) 0 var(--space-3);
  font-size: var(--text-xs);
  color: var(--app-muted);
}

.field {
  margin-bottom: var(--space-3);
}

.field--inline {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.field__label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 500;
  margin-bottom: var(--space-1);
  color: var(--app-text);
}

.field__hint {
  margin: var(--space-1) 0 0;
  font-size: 0.7rem;
  color: var(--app-muted);
}

.field-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

@media (max-width: 380px) {
  .field-group {
    grid-template-columns: 1fr;
  }
}

.logo-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

/* ----- Buttons ----- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn--primary {
  background: var(--app-accent);
  color: var(--app-on-accent);
}
.btn--primary:hover {
  background: var(--app-accent-hover);
}
.btn--primary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--app-focus-ring);
}

.btn--secondary {
  background: var(--app-surface);
  color: var(--app-text);
  border-color: var(--app-border);
}
.btn--secondary:hover {
  background: var(--app-accent-muted-bg);
  border-color: var(--app-border-accent);
}
.btn--secondary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--app-focus-ring);
}

.btn--ghost {
  background: transparent;
  color: var(--app-muted);
  border-color: transparent;
}
.btn--ghost:hover {
  color: var(--app-accent);
  background: var(--app-btn-ghost-accent-hover);
}
.btn--ghost:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--app-focus-ring);
}

.btn--sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}

.btn--lg {
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn--icon {
  padding: var(--space-1) var(--space-2);
  min-width: 2rem;
  font-size: var(--text-sm);
  line-height: 1;
}

.btn--danger:hover {
  background: #fef2f2;
  border-color: #fecaca;
  color: var(--app-danger);
}

/* ----- Inputs ----- */

.input {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-family: inherit;
  font-size: var(--text-sm);
  border: 1px solid var(--app-border);
  border-radius: var(--radius-sm);
  background: var(--app-input-bg);
  color: var(--app-text);
}
.input:focus {
  outline: none;
  border-color: var(--app-accent);
  box-shadow: 0 0 0 3px var(--app-focus-ring);
}

.input:focus-visible {
  outline: none;
  border-color: var(--app-accent);
  box-shadow: 0 0 0 3px var(--app-focus-ring);
}

.input--textarea {
  resize: vertical;
  min-height: 3.5rem;
}

.input--color {
  width: 3.5rem;
  height: 2.25rem;
  padding: 2px;
  cursor: pointer;
}

.input--file {
  padding: var(--space-1);
  font-size: var(--text-xs);
}

.input--line-desc {
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-3);
  min-height: 2.5rem;
}

.input--line-num {
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-3);
  font-variant-numeric: tabular-nums;
}

/* ----- Line items: table column labels ----- */

.table-settings {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--app-border);
}

.table-settings__hint {
  margin-bottom: var(--space-3);
}

/* ----- Line items (stacked rows) ----- */

.line-items-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.line-items-add {
  width: 100%;
  justify-content: center;
}

.line-item-row {
  border: 1px solid var(--app-border-accent);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  background:
    linear-gradient(180deg, var(--app-accent-subtle), var(--app-accent-subtle)),
    var(--app-muted-surface);
}

.line-item-row__top {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.line-item-row__num {
  flex: 0 0 auto;
  min-width: 1.5rem;
  padding-top: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--app-muted);
  text-align: right;
}

.line-item-row__desc {
  flex: 1 1 auto;
  min-width: 0;
}

.line-item-row__desc .input--line-desc {
  width: 100%;
}

.line-item-row__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--space-3);
}

.line-item-row__bottom > .line-item-field:first-child {
  flex: 0 0 5.75rem;
  max-width: 6.5rem;
}

.line-item-row__bottom > .line-item-field:nth-child(2) {
  flex: 1 1 8rem;
  min-width: min(100%, 7.5rem);
}

.line-item-row__bottom > .line-amt {
  flex: 0 0 6.75rem;
}

.line-item-row__bottom > .line-item-row__actions {
  flex: 0 0 auto;
  margin-left: auto;
}

@media (max-width: 440px) {
  .line-item-row__bottom > .line-item-row__actions {
    flex-basis: 100%;
    margin-left: 0;
    justify-content: flex-end;
  }
}

.line-item-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
}

.line-item-field--grow {
  flex: 1;
}

.line-item-field__label {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--app-muted);
}

.line-item-field--amt {
  text-align: right;
}

.line-amt__value {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--app-text);
  padding: var(--space-1) 0;
}

.line-item-row__actions {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--space-1);
  align-items: center;
  justify-content: flex-end;
}

.btn--line-action {
  min-width: 2.25rem;
  min-height: 2.25rem;
  padding: var(--space-2);
  font-size: var(--text-base);
  line-height: 1;
}

/* ----- Toggles ----- */

.toggle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

@media (max-width: 360px) {
  .toggle-grid {
    grid-template-columns: 1fr;
  }
}

.toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--app-border);
  background: var(--app-muted-surface);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.toggle:hover {
  border-color: var(--app-border-accent);
  background: var(--app-accent-subtle);
}

.toggle input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--app-accent);
}

.toggle__text {
  user-select: none;
}

.tax-discount-switches {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

@media (max-width: 420px) {
  .tax-discount-switches {
    grid-template-columns: 1fr;
  }
}

.toggle--block {
  display: flex;
  align-items: flex-start;
  width: 100%;
  margin: 0;
}

/* ----- Splash (first paint) ----- */

.app-splash {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  background:
    radial-gradient(circle at 20% 15%, var(--app-accent-subtle), transparent 45%),
    radial-gradient(circle at 80% 85%, var(--app-accent-subtle), transparent 45%),
    var(--app-bg);
  opacity: 1;
  visibility: visible;
  transition: opacity 0.38s ease, visibility 0.38s ease;
  animation: appSplashFadeIn 0.32s ease both;
}

.app-splash--hide {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.app-splash__card {
  text-align: center;
  max-width: 22rem;
  width: min(92vw, 24rem);
  padding: calc(var(--space-6) + 2px) var(--space-5);
  background: var(--app-surface);
  border: 1px solid var(--app-border-accent);
  border-radius: 18px;
  box-shadow:
    0 12px 40px rgba(2, 6, 23, 0.12),
    0 2px 10px rgba(2, 6, 23, 0.08);
  backdrop-filter: saturate(110%);
  animation: appSplashCardIn 0.45s ease both;
}

.app-splash__brand {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--app-text);
}

.app-splash__subtitle {
  margin: 0 0 var(--space-4);
  font-size: var(--text-sm);
  color: var(--app-muted);
}

.app-splash__status {
  margin: 0;
  font-size: 0.8rem;
  color: var(--app-muted);
  letter-spacing: 0.01em;
}

.app-splash__loader {
  display: inline-block;
  width: 1.45rem;
  height: 1.45rem;
  margin-top: var(--space-4);
  border-radius: 999px;
  border: 2px solid var(--app-border-accent);
  border-top-color: var(--app-accent);
  animation: appSplashSpin 0.82s linear infinite;
}

@keyframes appSplashSpin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes appSplashFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes appSplashCardIn {
  from {
    opacity: 0;
    transform: translateY(6px) scale(0.99);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ============================================================
   Public demo / subdomain — promo banner, notices, upgrade modal
   ============================================================ */

.persistence-banner--demo {
  display: none;
}

body[data-demo-mode='true'] .persistence-banner--full {
  display: none !important;
}

body[data-demo-mode='true'] .persistence-banner--demo {
  display: block !important;
}

.persistence-banner__link {
  color: var(--app-accent);
  font-weight: 600;
  margin-left: 0.25rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.persistence-banner__link:hover {
  border-bottom-color: var(--app-accent);
}

.demo-top-banner,
.preview-toolbar__upgrade {
  display: none;
}

body[data-demo-mode='true'] .demo-top-banner {
  display: block;
}

body[data-demo-mode='true'] .preview-toolbar__upgrade {
  display: inline;
}

.demo-top-banner {
  position: sticky;
  top: 0;
  z-index: 260;
  padding: 6px var(--space-4);
  background: var(--app-surface);
  border-bottom: 1px solid var(--app-border);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.04);
}

.demo-top-banner__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-3);
  min-height: 34px;
}

.demo-top-banner__msg {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: 0.6rem;
  row-gap: 0;
  min-width: 0;
  font-size: var(--text-xs);
  line-height: 1.35;
}

.demo-top-banner__title {
  font-weight: 600;
  color: var(--app-text);
}

.demo-top-banner__hint {
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--app-muted);
}

.demo-top-banner__cta {
  flex-shrink: 0;
  font-weight: 600;
  padding: 5px 12px;
  font-size: var(--text-xs);
  min-height: 30px;
}

@media (max-width: 480px) {
  .demo-top-banner__inner {
    align-items: flex-start;
  }

  .demo-top-banner__msg {
    flex-direction: column;
    align-items: flex-start;
    gap: 1px;
  }
}

.preview-toolbar__upgrade {
  margin-left: auto;
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--app-muted);
  text-decoration: none;
  white-space: nowrap;
  opacity: 0.92;
}

.preview-toolbar__upgrade:hover {
  color: var(--app-accent);
  opacity: 1;
  text-decoration: underline;
}

body[data-demo-mode='true'] .preview-toolbar {
  padding: var(--space-2) var(--space-3);
}

.demo-preview-upsell {
  margin: 0;
  padding: 6px var(--space-3);
  font-size: 0.7rem;
  color: var(--app-muted);
  background: transparent;
  border-bottom: 1px solid var(--app-border);
}

.demo-preview-upsell__text {
  color: var(--app-muted);
}

.demo-preview-upsell__link {
  margin-left: var(--space-2);
  font-weight: 500;
  font-size: 0.65rem;
  color: var(--app-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.demo-preview-upsell__link:hover {
  color: var(--app-accent);
  border-bottom-color: rgba(37, 99, 235, 0.35);
}

.demo-upgrade-modal[hidden] {
  display: none !important;
}

.demo-upgrade-modal:not([hidden]) {
  position: fixed;
  inset: 0;
  z-index: 400;
  background: var(--app-overlay-scrim);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: var(--space-5) var(--space-4);
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.demo-upgrade-modal__panel {
  margin-top: min(8vh, 64px);
  margin-bottom: var(--space-5);
  max-width: 400px;
  max-height: min(88vh, 640px);
  overflow-y: auto;
  width: 100%;
  padding: var(--space-4) var(--space-5) var(--space-5);
  background: var(--app-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--app-border);
  box-shadow:
    var(--shadow-md),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset;
}

.demo-upgrade-modal__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.demo-upgrade-modal__title {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  flex: 1;
}

.demo-upgrade-modal__close {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  margin: -6px -6px 0 0;
  padding: 0;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--app-muted);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
  transition:
    background 0.15s ease,
    color 0.15s ease;
}

.demo-upgrade-modal__close:hover {
  background: var(--app-hover);
  color: var(--app-text);
}

.demo-upgrade-modal__close:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--app-focus-ring);
}

.demo-upgrade-modal__lede {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  color: var(--app-text);
  line-height: 1.55;
}

.demo-upgrade-modal__benefits {
  margin: 0 0 var(--space-3);
  padding-left: 1.15rem;
  font-size: var(--text-xs);
  color: var(--app-text);
  line-height: 1.45;
}

.demo-upgrade-modal__benefits li {
  margin-bottom: 0.25rem;
}

.demo-upgrade-modal__trust {
  margin: 0 0 var(--space-4);
  font-size: 0.65rem;
  color: var(--app-muted);
  letter-spacing: 0.02em;
}

.demo-upgrade-modal__actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-2);
}

.demo-upgrade-modal__btn-primary {
  width: 100%;
  text-align: center;
  justify-content: center;
}

.demo-upgrade-modal__btn-secondary {
  width: 100%;
  justify-content: center;
  color: var(--app-muted);
}

.demo-upgrade-modal__btn-secondary:hover {
  color: var(--app-text);
}