/* ==========================================================================
   Microsoft 365 Features Calculator — Frontrow Technology
   Mobile-first responsive styles
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@500;600;700&display=swap');

/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */

:root {
  /* Brand colours */
  --color-navy: #1a1a2e;
  --color-navy-light: #252542;
  --color-navy-muted: #3a3a5c;
  --color-accent: #4361ee;
  --color-accent-hover: #3651d4;
  --color-accent-light: #eef0fd;
  --color-white: #ffffff;
  --color-off-white: #f7f8fc;
  --color-grey-50: #f9fafb;
  --color-grey-100: #f3f4f6;
  --color-grey-200: #e5e7eb;
  --color-grey-300: #d1d5db;
  --color-grey-400: #9ca3af;
  --color-grey-500: #6b7280;
  --color-grey-600: #4b5563;
  --color-grey-700: #374151;
  --color-grey-800: #1f2937;
  --color-grey-900: #111827;

  /* Status colours */
  --color-green: #16a34a;
  --color-green-light: #dcfce7;
  --color-green-border: #bbf7d0;
  --color-amber: #d97706;
  --color-amber-light: #fef3c7;
  --color-amber-border: #fde68a;
  --color-muted: #9ca3af;
  --color-muted-light: #f3f4f6;
  --color-muted-border: #e5e7eb;
  --color-blue-badge: #3b82f6;
  --color-blue-badge-light: #dbeafe;
  --color-blue-badge-border: #bfdbfe;
  --color-red: #dc2626;

  /* Typography */
  --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Layout */
  --max-width: 800px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}


/* ==========================================================================
   Reset & Base
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

/* No margin/padding when embedded in iframe */
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--line-height-normal);
  color: var(--color-grey-800);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

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

a:hover {
  text-decoration: underline;
}


/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-navy);
  line-height: var(--line-height-tight);
}

h1 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-3);
}

h2 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

h4 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
}

.subtitle {
  font-size: var(--text-lg);
  color: var(--color-grey-600);
  line-height: var(--line-height-relaxed);
  max-width: 560px;
}

.helper-text {
  font-size: var(--text-sm);
  color: var(--color-grey-500);
  line-height: var(--line-height-relaxed);
}

.disclaimer {
  font-size: var(--text-xs);
  color: var(--color-grey-400);
  margin-top: var(--space-6);
}


/* ==========================================================================
   Layout — Calculator Shell
   ========================================================================== */

.calculator {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-4) var(--space-4) var(--space-6);
  display: flex;
  flex-direction: column;
  text-align: center;
}

.calculator-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.calculator h2 {
  text-align: center;
}

.step-content {
  text-align: center;
}


/* ==========================================================================
   Progress Indicator — 4 Dots/Steps
   ========================================================================== */

.progress {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.progress-step {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background-color: var(--color-grey-200);
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.progress-step.active {
  background-color: var(--color-accent);
  transform: scale(1.3);
}

.progress-step.completed {
  background-color: var(--color-accent);
}

.progress-line {
  width: 32px;
  height: 2px;
  background-color: var(--color-grey-200);
  transition: background-color var(--transition-base);
}

.progress-line.completed {
  background-color: var(--color-accent);
}

.progress-label {
  font-size: var(--text-xs);
  color: var(--color-grey-400);
  text-align: center;
  margin-top: var(--space-1);
}


/* ==========================================================================
   Step Container — Transitions
   ========================================================================== */

.step {
  flex: 1;
  display: none;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.step.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* Slide-in from right for forward navigation */
.step.slide-in-right {
  transform: translateX(30px);
}

.step.slide-in-right.active {
  transform: translateX(0);
}

/* Slide-in from left for back navigation */
.step.slide-in-left {
  transform: translateX(-30px);
}

.step.slide-in-left.active {
  transform: translateX(0);
}

.step-content {
  margin-bottom: var(--space-4);
}


/* ==========================================================================
   Step 1 — Business Size Selector (Range Buttons Grid)
   ========================================================================== */

.size-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.size-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 88px;
  padding: var(--space-4) var(--space-3);
  border: 2px solid var(--color-grey-200);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast),
    box-shadow var(--transition-fast), transform var(--transition-fast);
  text-align: center;
}

.size-btn:hover {
  border-color: var(--color-accent);
  background-color: var(--color-accent-light);
  box-shadow: var(--shadow-md);
}

.size-btn:active {
  transform: scale(0.97);
}

.size-btn.selected {
  border-color: var(--color-accent);
  background-color: var(--color-accent-light);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

.size-btn-number {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: var(--space-1);
}

.size-btn-label {
  font-size: var(--text-sm);
  color: var(--color-grey-500);
}

.size-btn.selected .size-btn-number {
  color: var(--color-accent);
}


/* ==========================================================================
   Step 2 — Licence Tier Selector (Radio Cards)
   ========================================================================== */

.licence-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.licence-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border: 2px solid var(--color-grey-200);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast),
    box-shadow var(--transition-fast);
  min-height: 56px;
}

.licence-card:hover {
  border-color: var(--color-accent);
  background-color: var(--color-accent-light);
}

.licence-card.selected {
  border-color: var(--color-accent);
  background-color: var(--color-accent-light);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

.licence-card-radio {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-grey-300);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast);
}

.licence-card.selected .licence-card-radio {
  border-color: var(--color-accent);
}

.licence-card.selected .licence-card-radio::after {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background-color: var(--color-accent);
}

.licence-card-info {
  flex: 1;
}

.licence-card-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-navy);
}

.licence-card-price {
  font-size: var(--text-sm);
  color: var(--color-grey-500);
  margin-top: var(--space-1);
}

.licence-card.not-sure {
  border-style: dashed;
}

/* Hidden radio inputs */
.licence-card input[type="radio"] {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Licence helper / "I'm not sure" tooltip */
.licence-helper {
  background-color: var(--color-grey-50);
  border: 1px solid var(--color-grey-200);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-grey-600);
  line-height: var(--line-height-relaxed);
  display: none;
}

.licence-helper.visible {
  display: block;
}

/* Frontline toggle */
.frontline-toggle {
  margin-top: var(--space-6);
}

.frontline-trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-grey-500);
  cursor: pointer;
  padding: var(--space-2) 0;
  background: none;
  border: none;
}

.frontline-trigger:hover {
  color: var(--color-accent);
}

.frontline-trigger-icon {
  transition: transform var(--transition-fast);
  font-size: var(--text-xs);
}

.frontline-trigger.open .frontline-trigger-icon {
  transform: rotate(90deg);
}

.frontline-cards {
  display: none;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.frontline-cards.visible {
  display: flex;
}


/* ==========================================================================
   Step 3 — Priority Selector (Pill/Chip Buttons, Multi-select)
   ========================================================================== */

.priority-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.priority-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  min-height: 44px;
  border: 2px solid var(--color-grey-200);
  border-radius: var(--radius-full);
  background: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-grey-700);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast),
    color var(--transition-fast), box-shadow var(--transition-fast);
  user-select: none;
}

.priority-pill:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.priority-pill.selected {
  border-color: var(--color-accent);
  background-color: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(67, 97, 238, 0.25);
}

.priority-pill-icon {
  font-size: var(--text-base);
  line-height: 1;
}

.priority-pill input[type="checkbox"] {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.priority-hint {
  font-size: var(--text-sm);
  color: var(--color-grey-400);
  margin-top: var(--space-4);
}


/* ==========================================================================
   Step 4 — Feature Check Screen
   ========================================================================== */

.feature-check-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.feature-count {
  font-size: var(--text-sm);
  color: var(--color-grey-500);
  font-weight: 500;
}

.skip-link {
  font-size: var(--text-sm);
  color: var(--color-accent);
  cursor: pointer;
  background: none;
  border: none;
  padding: var(--space-2);
}

.skip-link:hover {
  text-decoration: underline;
}

/* Category group */
.feature-category {
  margin-bottom: var(--space-6);
  border: 1px solid var(--color-grey-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.feature-category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--color-grey-50);
  cursor: pointer;
  border: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-navy);
  transition: background-color var(--transition-fast);
  min-height: 44px;
}

.feature-category-header:hover {
  background: var(--color-grey-100);
}

.feature-category-icon {
  margin-right: var(--space-2);
  font-size: var(--text-lg);
}

.feature-category-count {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-grey-400);
  margin-left: auto;
  margin-right: var(--space-3);
}

.feature-category-chevron {
  transition: transform var(--transition-fast);
  color: var(--color-grey-400);
  font-size: var(--text-sm);
}

.feature-category.expanded .feature-category-chevron {
  transform: rotate(180deg);
}

.feature-category-body {
  display: none;
  padding: 0;
}

.feature-category.expanded .feature-category-body {
  display: block;
}

/* Individual feature row */
.feature-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-grey-100);
}

.feature-row-name {
  flex: 1;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-grey-800);
}

.feature-row-description {
  font-size: var(--text-xs);
  color: var(--color-grey-500);
  margin-top: var(--space-1);
  display: none;
}

/* 3-state toggle buttons */
.status-toggles {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-grey-200);
}

.status-toggle {
  padding: var(--space-2) var(--space-3);
  min-width: 44px;
  min-height: 36px;
  border: none;
  background: var(--color-white);
  cursor: pointer;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-grey-500);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
}

.status-toggle:not(:last-child) {
  border-right: 1px solid var(--color-grey-200);
}

.status-toggle:hover {
  background: var(--color-grey-50);
}

/* Using it — green */
.status-toggle.using.active {
  background-color: var(--color-green);
  color: var(--color-white);
}

/* Heard of it — amber */
.status-toggle.heard.active {
  background-color: var(--color-amber);
  color: var(--color-white);
}

/* Never heard of it — grey */
.status-toggle.never.active {
  background-color: var(--color-grey-500);
  color: var(--color-white);
}


/* ==========================================================================
   Results Screen
   ========================================================================== */

/* Summary card */
.results-summary {
  text-align: center;
  padding: var(--space-8) var(--space-6);
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
  border-radius: var(--radius-lg);
  color: var(--color-white);
  margin-bottom: var(--space-8);
}

.results-percentage {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.results-percentage-label {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
}

.results-summary-text {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.85);
  line-height: var(--line-height-relaxed);
  max-width: 480px;
  margin: 0 auto;
}

/* Donut chart container */
.chart-container {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  margin-bottom: var(--space-8);
}

.chart-container svg {
  max-width: 220px;
  max-height: 220px;
}

.chart-legend {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-top: var(--space-4);
  font-size: var(--text-sm);
}

.chart-legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.chart-legend-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

/* Category breakdown cards */
.category-breakdown {
  margin-bottom: var(--space-8);
}

.category-card {
  padding: var(--space-5);
  border: 1px solid var(--color-grey-200);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  background: var(--color-white);
}

.category-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.category-card-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-navy);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.category-card-stat {
  font-size: var(--text-sm);
  color: var(--color-grey-500);
}

/* Progress bar */
.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--color-grey-100);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-3);
}

.progress-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background-color: var(--color-accent);
  transition: width var(--transition-slow);
  min-width: 0;
}

.progress-bar-fill.low {
  background-color: var(--color-red);
}

.progress-bar-fill.medium {
  background-color: var(--color-amber);
}

.progress-bar-fill.high {
  background-color: var(--color-green);
}

/* Feature cards in results */
.feature-card {
  padding: var(--space-4);
  border: 1px solid var(--color-grey-100);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
  background: var(--color-white);
  transition: box-shadow var(--transition-fast);
}

.feature-card:hover {
  box-shadow: var(--shadow-sm);
}

.feature-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.feature-card-name {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-grey-800);
}

.feature-card-description {
  font-size: var(--text-sm);
  color: var(--color-grey-500);
  margin-top: var(--space-1);
  line-height: var(--line-height-relaxed);
}

/* Status badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.badge-included {
  background-color: var(--color-green-light);
  color: var(--color-green);
  border: 1px solid var(--color-green-border);
}

.badge-addon {
  background-color: var(--color-blue-badge-light);
  color: var(--color-blue-badge);
  border: 1px solid var(--color-blue-badge-border);
}

.badge-unavailable {
  background-color: var(--color-muted-light);
  color: var(--color-muted);
  border: 1px solid var(--color-muted-border);
}

/* Usage status indicator on result cards */
.usage-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-grey-500);
  margin-top: var(--space-2);
}

.usage-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.usage-dot.using {
  background-color: var(--color-green);
}

.usage-dot.heard {
  background-color: var(--color-amber);
}

.usage-dot.never {
  background-color: var(--color-grey-400);
}

/* Expandable "What this means" section */
.feature-expand {
  margin-top: var(--space-3);
  border-top: 1px solid var(--color-grey-100);
  padding-top: var(--space-3);
}

.feature-expand-trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-accent);
  cursor: pointer;
  background: none;
  border: none;
  padding: var(--space-1) 0;
  min-height: 44px;
}

.feature-expand-trigger:hover {
  text-decoration: underline;
}

.feature-expand-trigger-icon {
  transition: transform var(--transition-fast);
  font-size: var(--text-xs);
}

.feature-expand-trigger.open .feature-expand-trigger-icon {
  transform: rotate(180deg);
}

.feature-expand-body {
  display: none;
  padding-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-grey-600);
  line-height: var(--line-height-relaxed);
}

.feature-expand-body.visible {
  display: block;
}

/* Micro-CTA per category */
.category-cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-off-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-grey-100);
}

.category-cta-text {
  flex: 1;
  font-size: var(--text-sm);
  color: var(--color-grey-600);
  line-height: var(--line-height-relaxed);
}

.category-cta-link {
  flex-shrink: 0;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  white-space: nowrap;
}

.category-cta-link:hover {
  text-decoration: underline;
}


/* ==========================================================================
   CTA Buttons — Final Block
   ========================================================================== */

.cta-block {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  margin-top: var(--space-8);
  border-top: 1px solid var(--color-grey-200);
}

.cta-block h2 {
  margin-bottom: var(--space-3);
}

.cta-block p {
  color: var(--color-grey-500);
  margin-bottom: var(--space-6);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-base);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast),
    box-shadow var(--transition-fast), transform var(--transition-fast);
  min-height: 48px;
  border: 2px solid transparent;
  text-decoration: none;
  line-height: 1;
}

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

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

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  box-shadow: 0 4px 12px rgba(67, 97, 238, 0.3);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-secondary:hover {
  background-color: var(--color-accent-light);
}

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

.cta-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: center;
}


/* ==========================================================================
   Navigation — Back / Next Buttons
   ========================================================================== */

.step-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-6);
  margin-top: auto;
  border-top: 1px solid var(--color-grey-100);
}

/* Force centre everything in all steps */
.step h1, .step h2, .step h3, .step p,
.calculator h1, .calculator h2, .calculator h3, .calculator p,
.step-content h1, .step-content h2, .step-content h3, .step-content p {
  text-align: center !important;
}

.size-grid, .tier-grid, .priority-grid {
  justify-content: center;
}

.step-nav {
  justify-content: center !important;
}

.cta-block {
  text-align: center !important;
}

.cta-buttons {
  justify-content: center !important;
}

.step-nav .btn {
  min-width: 120px;
}

.btn-back {
  background: none;
  border: none;
  color: var(--color-grey-500);
  font-weight: 500;
  padding: var(--space-3) var(--space-4);
  min-height: 44px;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.btn-back:hover {
  color: var(--color-navy);
}

.btn-next {
  margin-left: auto;
}

.btn-next:disabled,
.btn-next[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}


/* ==========================================================================
   Accessibility
   ========================================================================== */

/* Focus visible outlines — keyboard navigation */
*:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Remove outline for mouse users */
*:focus:not(:focus-visible) {
  outline: none;
}

/* Ensure interactive elements have focus styles */
.size-btn:focus-visible,
.licence-card:focus-visible,
.priority-pill:focus-visible,
.status-toggle:focus-visible,
.feature-category-header:focus-visible,
.feature-expand-trigger:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Screen reader only */
.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;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .step.active {
    transform: none;
  }
}


/* ==========================================================================
   Utility Classes
   ========================================================================== */

.hidden {
  display: none !important;
}

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

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }


/* ==========================================================================
   Responsive — Tablet (640px+)
   ========================================================================== */

@media (min-width: 640px) {
  h1 {
    font-size: var(--text-3xl);
  }

  h2 {
    font-size: var(--text-2xl);
  }

  .calculator {
    padding: var(--space-8) var(--space-6);
  }

  .size-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .size-btn {
    min-height: 100px;
  }

  .results-percentage {
    font-size: 5rem;
  }

  .status-toggles {
    gap: 0;
  }

  .status-toggle {
    padding: var(--space-2) var(--space-4);
  }

  .feature-row {
    gap: var(--space-4);
  }

  .feature-row-description {
    display: block;
  }

  .cta-buttons {
    flex-direction: row;
    justify-content: center;
  }

  .category-cta {
    flex-direction: row;
  }
}


/* ==========================================================================
   Responsive — Desktop (1024px+)
   ========================================================================== */

@media (min-width: 1024px) {
  h1 {
    font-size: var(--text-4xl);
  }

  .calculator {
    padding: var(--space-12) var(--space-8);
  }

  .subtitle {
    font-size: var(--text-xl);
  }

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

  .licence-card.not-sure {
    grid-column: 1 / -1;
  }

  .priority-pills {
    gap: var(--space-4);
  }

  .priority-pill {
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
  }

  .chart-container svg {
    max-width: 260px;
    max-height: 260px;
  }

  .feature-card-top {
    align-items: center;
  }

  .cta-block {
    padding: var(--space-12) var(--space-8);
  }

  .btn {
    min-height: 52px;
    padding: var(--space-4) var(--space-10);
  }
}


/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
  .step-nav,
  .progress,
  .cta-block,
  .skip-link,
  .feature-expand-trigger {
    display: none !important;
  }

  .calculator {
    max-width: 100%;
    padding: 0;
  }

  .results-summary {
    color: #000;
    background: #f0f0f0;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .feature-expand-body {
    display: block !important;
  }

  .feature-category.expanded .feature-category-body,
  .feature-category .feature-category-body {
    display: block !important;
  }
}