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

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--gradient-page);
  background-attachment: fixed;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-lg);
}

.app {
  width: min(560px, 100%);
}

/* —— Kiosk two-column layout (wide screens) —— */

body.kiosk-page .app {
  width: min(1100px, 100%);
}

.kiosk-workspace {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  min-width: 0;
}

.kiosk-columns {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
  align-items: start;
  margin-bottom: var(--space-lg);
}

.kiosk-columns .kiosk-workspace .panel,
.kiosk-columns > .results.panel {
  margin-bottom: 0;
}

@media (min-width: 960px) {
  .kiosk-columns {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .kiosk-columns > .results.panel {
    position: sticky;
    top: var(--space-lg);
    max-height: calc(100vh - 2 * var(--space-lg));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* —— Cross-page nav —— */

.page-nav {
  display: flex;
  justify-content: flex-end;
  margin-bottom: var(--space-md);
}

.page-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--color-surface-strong);
  background: var(--gradient-key);
  box-shadow: 0 4px 20px color-mix(in srgb, var(--color-purple) 35%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-light-blue) 55%, transparent);
  transition:
    transform 0.15s ease,
    box-shadow 0.2s ease;
}

.page-nav__link--back::before {
  content: "←";
  font-size: 1rem;
  opacity: 0.95;
}

.page-nav__link--back::after {
  content: none;
}

.page-nav__link:hover {
  transform: translateY(-2px);
  box-shadow:
    0 6px 28px color-mix(in srgb, var(--color-pink) 40%, transparent),
    var(--shadow-glow);
}

.page-nav__link:focus-visible {
  outline: 3px solid var(--color-light-blue);
  outline-offset: 3px;
}

.config-page .page-nav__link {
  background: var(--gradient-key-secondary);
  border-color: color-mix(in srgb, var(--color-purple) 40%, transparent);
}

.config-page .page-nav__link:hover {
  box-shadow:
    0 6px 28px color-mix(in srgb, var(--color-purple) 45%, transparent),
    0 0 32px color-mix(in srgb, var(--color-pink) 25%, transparent);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.brand img {
  width: 48px;
  height: auto;
  filter: drop-shadow(0 2px 8px color-mix(in srgb, var(--color-purple) 45%, transparent));
}

.brand h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: normal;
  background: var(--gradient-hero);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  line-height: 1.25;
}

.panel {
  position: relative;
  background: var(--color-surface);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-soft);
  border: 1px solid color-mix(in srgb, var(--color-purple) 14%, white);
}

.panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--radius);
  bottom: var(--radius);
  width: 4px;
  border-radius: 4px;
  background: linear-gradient(
    180deg,
    var(--color-light-blue) 0%,
    var(--color-purple) 45%,
    var(--color-pink) 100%
  );
}

.results.panel::before {
  background: linear-gradient(
    180deg,
    var(--color-pink) 0%,
    var(--color-purple) 50%,
    var(--color-light-blue) 100%
  );
}

.field-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.field-btn {
  min-height: var(--space-touch-target);
  border-radius: var(--radius);
  border: 2px solid color-mix(in srgb, var(--color-purple) 18%, transparent);
  background: var(--color-surface-strong);
  font: inherit;
  font-size: 1.1rem;
  text-align: left;
  padding: 0.75rem 1rem;
  cursor: pointer;
  color: var(--color-ink);
  transition:
    border-color 0.15s ease,
    box-shadow 0.2s ease;
}

.field-btn:hover {
  border-color: color-mix(in srgb, var(--color-purple) 45%, transparent);
}

.field-btn[aria-pressed="true"] {
  border-color: var(--color-purple);
  box-shadow:
    0 0 0 2px color-mix(in srgb, var(--color-light-blue) 70%, var(--color-purple)),
    0 8px 24px color-mix(in srgb, var(--color-purple) 18%, transparent);
}

.field-label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 0.25rem;
}

.field-value {
  font-size: 1.5rem;
  font-variant-numeric: tabular-nums;
  color: var(--color-dark-blue);
}

.keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.keypad button {
  min-height: var(--space-touch-target);
  border: none;
  border-radius: var(--radius);
  background: var(--gradient-key);
  color: #fff;
  font-size: 1.35rem;
  font-weight: 600;
  cursor: pointer;
  text-shadow: 0 1px 2px color-mix(in srgb, var(--color-dark-blue) 35%, transparent);
  box-shadow: 0 4px 0 color-mix(in srgb, var(--color-dark-blue) 55%, var(--color-purple));
  transition:
    transform 0.08s ease,
    filter 0.15s ease;
}

.keypad button:active {
  transform: translateY(3px);
  box-shadow: none;
}

.keypad button.secondary {
  background: var(--gradient-key-secondary);
  box-shadow: 0 4px 0 color-mix(in srgb, var(--color-dark-blue) 80%, black);
}

.keypad button.secondary:active {
  box-shadow: none;
}

.keypad .wide {
  grid-column: span 3;
  background: var(--gradient-key-aqua);
  color: #fff;
  text-shadow: 0 1px 2px color-mix(in srgb, var(--color-dark-blue) 45%, transparent);
  font-size: 1rem;
  font-weight: 700;
  box-shadow: 0 4px 0 color-mix(in srgb, var(--color-purple) 55%, var(--color-light-blue));
}

.keypad .wide:active {
  box-shadow: none;
}

.results {
  text-align: center;
}

.hero-savings {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 10vw, 3.5rem);
  margin: 0 0 var(--space-md);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  background: var(--gradient-hero);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  filter: drop-shadow(0 2px 12px color-mix(in srgb, var(--color-pink) 25%, transparent));
}

.sub-hero {
  font-size: 1.2rem;
  margin: 0 0 var(--space-lg);
  color: var(--color-muted);
}

.stat-grid {
  text-align: left;
  display: grid;
  gap: 0.75rem;
  margin-bottom: var(--space-lg);
}

.stat-grid dt {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.stat-grid dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
  font-size: 1.05rem;
  color: var(--color-dark-blue);
}

.footnote {
  font-size: 0.78rem;
  color: var(--color-muted);
  line-height: 1.45;
  text-align: left;
  padding-top: 0.5rem;
  border-top: 1px dashed color-mix(in srgb, var(--color-purple) 22%, transparent);
}

.toolbar {
  display: flex;
  justify-content: center;
  margin-top: var(--space-lg);
}

.toolbar button {
  min-height: var(--space-touch-target);
  min-width: 200px;
  border-radius: var(--radius-pill);
  border: 2px solid var(--color-purple);
  background: transparent;
  color: var(--color-purple);
  font: inherit;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    box-shadow 0.2s ease;
}

.toolbar button:hover {
  background: var(--gradient-key);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 8px 28px color-mix(in srgb, var(--color-purple) 35%, transparent);
}

.toolbar button:focus-visible {
  outline: 3px solid var(--color-light-blue);
  outline-offset: 3px;
}

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

/* —— Config page —— */

.config-page .app {
  max-width: 480px;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.95rem;
  margin-bottom: 1rem;
  color: var(--color-dark-blue);
  font-weight: 600;
}

.form-grid input {
  min-height: 48px;
  border-radius: 12px;
  border: 2px solid color-mix(in srgb, var(--color-purple) 22%, transparent);
  padding: 0 0.75rem;
  font: inherit;
  background: var(--color-surface-strong);
  color: var(--color-ink);
  transition:
    border-color 0.15s ease,
    box-shadow 0.2s ease;
}

.form-grid input:focus {
  outline: none;
  border-color: var(--color-purple);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-light-blue) 65%, transparent);
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.form-actions button {
  min-height: 48px;
  padding: 0 1.25rem;
  border-radius: var(--radius-pill);
  border: none;
  background: var(--gradient-key);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 18px color-mix(in srgb, var(--color-purple) 35%, transparent);
  transition:
    transform 0.12s ease,
    box-shadow 0.2s ease;
}

.form-actions button:hover {
  transform: translateY(-1px);
  box-shadow:
    0 8px 28px color-mix(in srgb, var(--color-pink) 35%, transparent),
    var(--shadow-glow);
}

#config-status {
  margin-top: 1rem;
  font-size: 0.95rem;
  min-height: 1.5rem;
}

#config-status.error {
  color: color-mix(in srgb, var(--color-pink) 45%, #8b0000);
  font-weight: 600;
}

#config-status.ok {
  color: color-mix(in srgb, var(--color-light-blue) 15%, #0d4f2d);
  font-weight: 600;
}