/* ============================================================
   CheckMyPC - CSS Design System
   Heliocentrix Branding
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@600;700;800&family=Nunito+Sans:ital,wght@0,400;0,600;0,700;1,400&display=swap');

/* ============================================================
   1. Custom Properties (Design Tokens)
   ============================================================ */
:root {
  /* Brand colors */
  --color-primary: #eb5e28;
  --color-primary-dark: #d14e1c;
  --color-primary-light: #f07a4d;
  --color-dark: #2f2f2f;
  --color-dark-soft: #4a4a4a;
  --color-white: #ffffff;
  --color-off-white: #f8f8f8;
  --color-light-gray: #e9ecef;
  --color-mid-gray: #6c757d;

  /* Status colors */
  --color-green: #28a745;
  --color-green-light: #d4edda;
  --color-amber: #ffc107;
  --color-amber-light: #fff3cd;
  --color-red: #dc3545;
  --color-red-light: #f8d7da;

  /* Typography */
  --font-body: 'Nunito Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Font sizes — fluid scale */
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-md: 1.125rem;   /* 18px */
  --text-lg: 1.25rem;    /* 20px */
  --text-xl: 1.5rem;     /* 24px */
  --text-2xl: 2rem;      /* 32px */
  --text-3xl: 2.5rem;    /* 40px */

  /* Spacing */
  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2rem;      /* 32px */
  --space-2xl: 3rem;     /* 48px */
  --space-3xl: 4rem;     /* 64px */

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 12px 36px rgba(0, 0, 0, 0.16);
  --shadow-card-hover: 0 12px 28px rgba(235, 94, 40, 0.18);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;

  /* Z-index layers */
  --z-base: 1;
  --z-sticky: 100;
  --z-overlay: 200;
  --z-modal: 300;

  /* Layout */
  --container-max: 960px;
  --header-height: 64px;
  --touch-min: 44px;
}

/* ============================================================
   2. Reset & Base
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-dark);
  background-color: var(--color-off-white);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul,
ol {
  list-style: none;
}

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

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

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

/* ============================================================
   3. Focus & Accessibility
   ============================================================ */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

:focus:not(:focus-visible) {
  outline: none;
}

.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;
}

@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;
  }
}

/* ============================================================
   4. Typography
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-dark);
}

h1 {
  font-size: var(--text-2xl);
  font-weight: 800;
}

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

h3 {
  font-size: var(--text-lg);
}

h4 {
  font-size: var(--text-md);
  font-weight: 600;
}

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

p:last-child {
  margin-bottom: 0;
}

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

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

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

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

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

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

/* ============================================================
   5. Layout & Container
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* ============================================================
   6. Screen / Page Sections
   ============================================================ */
.screen {
  display: none;
  flex-direction: column;
  flex: 1;
  padding-bottom: var(--space-2xl);
}

.screen.active {
  display: flex;
}

/* --- Page Transitions --- */
.screen.slide-in-right {
  animation: slideInRight var(--transition-base) forwards;
}

.screen.slide-in-left {
  animation: slideInLeft var(--transition-base) forwards;
}

.screen.fade-in {
  animation: fadeIn var(--transition-base) forwards;
}

.screen.fade-out {
  animation: fadeOut var(--transition-fast) forwards;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

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

/* ============================================================
   7. Welcome Screen
   ============================================================ */
.welcome {
  padding-top: var(--space-2xl);
  align-items: center;
  text-align: center;
}

.welcome-logo {
  width: 160px;
  height: auto;
  margin-bottom: var(--space-lg);
}

.welcome-headline {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-sm);
}

.welcome-subtext {
  font-size: var(--text-md);
  color: var(--color-mid-gray);
  margin-bottom: var(--space-2xl);
  max-width: 480px;
}

/* ============================================================
   7b. Password Checker Card
   ============================================================ */
.password-checker-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  background: var(--color-white);
  border: 2px solid var(--color-light-gray);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg);
  cursor: pointer;
  width: 100%;
  max-width: 560px;
  text-align: center;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.password-checker-card:hover,
.password-checker-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary);
}

.password-checker-card:active {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

a.password-checker-card {
  text-decoration: none;
  color: inherit;
}

a.password-checker-card:hover {
  text-decoration: none;
  color: inherit;
}

.password-checker-icon {
  color: var(--color-primary);
  line-height: 1;
}

.password-checker-text {
  flex: 1;
  min-width: 0;
}

.password-checker-heading {
  font-size: var(--text-lg);
  margin-bottom: var(--space-xs);
}

.password-checker-desc {
  font-size: var(--text-sm);
  color: var(--color-mid-gray);
  margin-bottom: var(--space-md);
}

/* --- Welcome Divider --- */
.welcome-divider {
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 560px;
  margin: var(--space-lg) 0;
}

.welcome-divider::before,
.welcome-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-light-gray);
}

.welcome-divider-text {
  padding: 0 var(--space-lg);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-mid-gray);
  text-transform: lowercase;
}

/* --- Welcome Section Heading --- */
.welcome-section-heading {
  font-size: var(--text-lg);
  margin-bottom: var(--space-lg);
  color: var(--color-dark);
}

/* ============================================================
   8. Device Cards Grid
   ============================================================ */
.device-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
}

.device-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  background: var(--color-white);
  border: 2px solid var(--color-light-gray);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-md);
  cursor: pointer;
  min-height: 120px;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.device-card:hover,
.device-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary);
}

.device-card:active {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.device-card.selected {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(235, 94, 40, 0.04), rgba(235, 94, 40, 0.08));
  box-shadow: var(--shadow-card-hover);
}

.device-card-icon {
  font-size: 2.5rem;
  line-height: 1;
  color: var(--color-primary);
}

.device-card-label {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-dark);
  text-align: center;
}

/* ============================================================
   9. Sticky Check-Flow Header
   ============================================================ */
.check-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-light-gray);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
}

.check-header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  max-width: var(--container-max);
  margin: 0 auto;
}

.check-header-icon {
  font-size: var(--text-xl);
  color: var(--color-primary);
  flex-shrink: 0;
}

.check-header-info {
  flex: 1;
  min-width: 0;
}

.check-header-label {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-xs);
}

/* ============================================================
   10. Progress Bar
   ============================================================ */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--color-light-gray);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  transition: width var(--transition-base);
  position: relative;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 100%
  );
  animation: progressShimmer 2s infinite;
}

@keyframes progressShimmer {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.progress-text {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-mid-gray);
  margin-top: var(--space-xs);
  text-align: right;
}

/* ============================================================
   11. Check Screen Content
   ============================================================ */
.check-content {
  padding: var(--space-xl) var(--space-md);
  max-width: var(--container-max);
  margin: 0 auto;
  width: 100%;
}

.check-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
}

.check-description {
  font-size: var(--text-base);
  color: var(--color-dark-soft);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.check-instructions {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.check-instructions h3 {
  font-size: var(--text-md);
  margin-bottom: var(--space-md);
}

.check-instructions ol {
  list-style: decimal;
  padding-left: var(--space-lg);
}

.check-instructions li {
  margin-bottom: var(--space-sm);
  line-height: 1.6;
}

.check-instructions li:last-child {
  margin-bottom: 0;
}

/* ============================================================
   12. Option Buttons (Yes / No / Don't Know)
   ============================================================ */
.option-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.option-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: var(--touch-min);
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  border: 2px solid var(--color-light-gray);
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-dark);
  cursor: pointer;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.option-btn:hover {
  border-color: var(--color-primary);
  background: rgba(235, 94, 40, 0.04);
}

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

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

.option-btn.selected-green {
  border-color: var(--color-green);
  background: var(--color-green);
  color: var(--color-white);
}

.option-btn.selected-red {
  border-color: var(--color-red);
  background: var(--color-red);
  color: var(--color-white);
}

.option-btn.selected-amber {
  border-color: var(--color-amber);
  background: var(--color-amber);
  color: var(--color-dark);
}

/* ============================================================
   13. Navigation Buttons (Back / Next)
   ============================================================ */
.nav-buttons {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-md);
  max-width: var(--container-max);
  margin: auto auto 0;
  width: 100%;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: var(--touch-min);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 700;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    background var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
  white-space: nowrap;
}

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

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--color-dark);
  border-color: var(--color-light-gray);
}

.btn-secondary:hover {
  border-color: var(--color-dark);
  background: var(--color-light-gray);
}

.btn-back {
  flex: 0 0 auto;
}

.btn-next {
  flex: 1;
}

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

.btn-lg {
  min-height: 56px;
  padding: var(--space-md) var(--space-2xl);
  font-size: var(--text-md);
}

/* ============================================================
   14. Results Screen
   ============================================================ */
.results {
  padding-top: var(--space-2xl);
  align-items: center;
  text-align: center;
}

/* --- Score Circle --- */
.score-circle {
  width: 160px;
  height: 160px;
  border-radius: var(--radius-full);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  animation: scaleIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  transform: scale(0);
}

.score-circle.status-green {
  background: var(--color-green);
  color: var(--color-white);
  box-shadow: 0 8px 32px rgba(40, 167, 69, 0.3);
}

.score-circle.status-amber {
  background: var(--color-amber);
  color: var(--color-dark);
  box-shadow: 0 8px 32px rgba(255, 193, 7, 0.3);
}

.score-circle.status-red {
  background: var(--color-red);
  color: var(--color-white);
  box-shadow: 0 8px 32px rgba(220, 53, 69, 0.3);
}

.score-circle-value {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1;
}

.score-circle-label {
  font-size: var(--text-sm);
  font-weight: 600;
  opacity: 0.9;
  margin-top: var(--space-xs);
}

@keyframes scaleIn {
  from {
    transform: scale(0);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

/* --- Status Headline --- */
.results-headline {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
  animation: fadeIn var(--transition-base) 0.3s both;
}

.results-subtext {
  font-size: var(--text-base);
  color: var(--color-mid-gray);
  margin-bottom: var(--space-2xl);
  max-width: 480px;
  animation: fadeIn var(--transition-base) 0.4s both;
}

/* --- Summary Badges --- */
.results-summary-badges {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
  animation: fadeIn var(--transition-base) 0.4s both;
}

.summary-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
}

.summary-badge-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  flex-shrink: 0;
}

.summary-badge-icon.pass {
  background: var(--color-green-light);
  color: var(--color-green);
}

.summary-badge-icon.warn {
  background: var(--color-amber-light);
  color: var(--color-amber);
}

.summary-badge-icon.fail {
  background: var(--color-red-light);
  color: var(--color-red);
}

.summary-badge-pass { color: var(--color-green); }
.summary-badge-warn { color: var(--color-amber); }
.summary-badge-fail { color: var(--color-red); }

/* --- Result Items --- */
.results-list {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  text-align: left;
}

.result-item {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-sm);
  box-shadow: var(--shadow-sm);
  animation: resultSlideIn var(--transition-base) both;
}

.result-item:nth-child(1) { animation-delay: 0.1s; }
.result-item:nth-child(2) { animation-delay: 0.15s; }
.result-item:nth-child(3) { animation-delay: 0.2s; }
.result-item:nth-child(4) { animation-delay: 0.25s; }
.result-item:nth-child(5) { animation-delay: 0.3s; }
.result-item:nth-child(6) { animation-delay: 0.35s; }
.result-item:nth-child(7) { animation-delay: 0.4s; }

@keyframes resultSlideIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--text-sm);
  font-weight: 700;
}

.result-icon.pass {
  background: var(--color-green-light);
  color: var(--color-green);
}

.result-icon.warn {
  background: var(--color-amber-light);
  color: var(--color-amber);
}

.result-icon.fail {
  background: var(--color-red-light);
  color: var(--color-red);
}

.result-label {
  flex: 1;
  font-weight: 600;
  font-size: var(--text-sm);
}

.result-status {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.result-status.pass  { color: var(--color-green); }
.result-status.warn  { color: var(--color-amber); }
.result-status.fail  { color: var(--color-red); }

/* --- Expandable Result Details --- */
.result-detail {
  flex-basis: 100%;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-base), padding var(--transition-base);
}

.result-item.expanded .result-detail {
  max-height: 200px;
  padding-top: var(--space-md);
}

.result-detail-text {
  font-size: var(--text-sm);
  color: var(--color-dark-soft);
  line-height: 1.7;
  border-top: 1px solid var(--color-light-gray);
  padding-top: var(--space-md);
}

.result-why-text {
  margin-bottom: var(--space-sm);
}

.result-fix-heading {
  margin-top: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-red-light);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.result-item .result-fix-heading strong {
  color: var(--color-red);
}

/* ============================================================
   15. Checkmark Pop-In Animation
   ============================================================ */
.checkmark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  opacity: 0;
  transform: scale(0);
}

.checkmark.animate {
  animation: checkBounce 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes checkBounce {
  0% {
    opacity: 0;
    transform: scale(0);
  }
  50% {
    opacity: 1;
    transform: scale(1.25);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* ============================================================
   16. Shake Animation (Incomplete Selection Warning)
   ============================================================ */
.shake {
  animation: shake 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
  20%, 40%, 60%, 80% { transform: translateX(4px); }
}

/* ============================================================
   17. Expandable / Accordion Sections
   ============================================================ */
.accordion {
  width: 100%;
  max-width: 600px;
  margin: 0 auto var(--space-lg);
}

.accordion-item {
  background: var(--color-white);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  width: 100%;
  min-height: var(--touch-min);
  padding: var(--space-md) var(--space-lg);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-dark);
  text-align: left;
  transition: background var(--transition-fast);
}

.accordion-header:hover {
  background: var(--color-off-white);
}

.accordion-chevron {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
  color: var(--color-mid-gray);
}

.accordion-item.open .accordion-chevron {
  transform: rotate(180deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.accordion-item.open .accordion-body {
  max-height: 500px;
}

.accordion-body-inner {
  padding: 0 var(--space-lg) var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-dark-soft);
  line-height: 1.7;
}

/* ============================================================
   18. Support Contact Section
   ============================================================ */
.support-contact {
  position: relative;
  width: 100%;
  max-width: 600px;
  margin: var(--space-2xl) auto 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-dark);
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.15),
    0 0 0 1px rgba(235, 94, 40, 0.1);
  animation: supportFadeIn 0.5s 0.5s both;
}

@keyframes supportFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Warm orange glow behind the card */
.support-glow {
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 120%;
  height: 80%;
  background: radial-gradient(
    ellipse at center,
    rgba(235, 94, 40, 0.15) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.support-inner {
  position: relative;
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  z-index: 1;
}

/* Headset badge */
.support-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-white);
  margin-bottom: var(--space-md);
  box-shadow: 0 4px 16px rgba(235, 94, 40, 0.35);
}

.support-badge svg {
  width: 28px;
  height: 28px;
}

.support-heading {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--space-xs);
  letter-spacing: -0.01em;
}

.support-text {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-lg);
  line-height: 1.65;
  max-width: 380px;
  margin-left: auto;
  margin-right: auto;
}

.support-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
}

.support-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  width: 100%;
  max-width: 320px;
  min-height: var(--touch-min);
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-body);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-white);
  text-decoration: none;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
  text-align: left;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.support-link:hover,
.support-link:focus-visible {
  text-decoration: none;
  background: rgba(235, 94, 40, 0.12);
  border-color: rgba(235, 94, 40, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(235, 94, 40, 0.15);
  color: var(--color-white);
}

.support-link:active {
  transform: translateY(0);
  box-shadow: none;
}

.support-link-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: rgba(235, 94, 40, 0.15);
  color: var(--color-primary-light);
}

.support-link-icon svg {
  width: 18px;
  height: 18px;
}

.support-link-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.support-link-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.support-link-value {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-white);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (min-width: 768px) {
  .support-inner {
    padding: var(--space-2xl) var(--space-xl);
  }

  .support-links {
    flex-direction: row;
    justify-content: center;
    gap: var(--space-md);
  }

  .support-link {
    width: auto;
    max-width: none;
    flex: 1;
  }
}

/* ============================================================
   19. Results Action Buttons
   ============================================================ */
/* --- Password Advice Section --- */
.password-advice {
  width: 100%;
  max-width: 600px;
  margin: var(--space-xl) auto 0;
  padding: var(--space-lg);
  background: var(--color-off-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-light-gray);
  text-align: left;
}

.password-advice-heading {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-dark);
  margin: 0 0 var(--space-md);
}

.password-advice-tip {
  margin-bottom: var(--space-md);
}

.password-advice-tip:last-child {
  margin-bottom: 0;
}

.password-advice-tip-title {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 var(--space-xs);
}

.password-advice-tip-text {
  font-size: var(--text-sm);
  color: var(--color-dark-soft);
  margin: 0;
  line-height: 1.6;
}

.results-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  width: 100%;
  max-width: 400px;
  margin: var(--space-xl) auto 0;
  padding: 0 var(--space-md);
}

/* ============================================================
   18b. Game Quick Links (Home Page)
   ============================================================ */
.game-quick-links {
  margin-top: var(--space-md);
  text-align: center;
  max-width: 560px;
  width: 100%;
}

.game-quick-links-label {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-mid-gray);
  text-transform: lowercase;
}

.game-quick-links-row {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-sm);
}

.game-quick-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-mid-gray);
  text-decoration: none;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition:
    color var(--transition-fast),
    background var(--transition-fast);
}

.game-quick-link:hover,
.game-quick-link:focus-visible {
  color: var(--color-primary);
  background: rgba(235, 94, 40, 0.06);
  text-decoration: none;
}

.game-quick-link svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

/* ============================================================
   19. Utility Classes
   ============================================================ */
.hidden {
  display: none !important;
}

.mb-sm  { margin-bottom: var(--space-sm); }
.mb-md  { margin-bottom: var(--space-md); }
.mb-lg  { margin-bottom: var(--space-lg); }
.mb-xl  { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.mt-sm  { margin-top: var(--space-sm); }
.mt-md  { margin-top: var(--space-md); }
.mt-lg  { margin-top: var(--space-lg); }
.mt-xl  { margin-top: var(--space-xl); }

/* ============================================================
   20. Loading / Spinner
   ============================================================ */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-light-gray);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
  margin: var(--space-xl) auto;
}

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

/* ============================================================
   21. Tooltip / Info
   ============================================================ */
.info-tip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  background: var(--color-light-gray);
  color: var(--color-mid-gray);
  font-size: var(--text-xs);
  font-weight: 700;
  cursor: help;
  vertical-align: middle;
  margin-left: var(--space-xs);
}

/* ============================================================
   22. Responsive — Tablet (768px+)
   ============================================================ */
@media (min-width: 768px) {
  :root {
    --text-2xl: 2.25rem;
    --text-3xl: 3rem;
  }

  .container {
    padding-left: var(--space-xl);
    padding-right: var(--space-xl);
  }

  .welcome {
    padding-top: var(--space-3xl);
  }

  .welcome-logo {
    width: 200px;
  }

  .password-checker-card {
    flex-direction: row;
    text-align: left;
    max-width: 640px;
    padding: var(--space-xl);
  }

  .password-checker-desc {
    margin-bottom: 0;
  }

  .password-checker-card .btn {
    flex-shrink: 0;
  }

  .welcome-divider {
    max-width: 640px;
  }

  .device-grid {
    grid-template-columns: repeat(4, 1fr);
    max-width: 640px;
    gap: var(--space-lg);
  }

  .device-card {
    padding: var(--space-xl) var(--space-md);
    min-height: 140px;
  }

  .device-card-icon {
    font-size: 3rem;
  }

  .device-card-label {
    font-size: var(--text-base);
  }

  .option-group {
    flex-direction: row;
    gap: var(--space-md);
  }

  .option-btn {
    flex: 1;
    padding: var(--space-md) var(--space-xl);
  }

  .nav-buttons {
    padding: var(--space-xl);
  }

  .score-circle {
    width: 180px;
    height: 180px;
  }

  .results-actions {
    flex-direction: row;
    max-width: 600px;
  }

  .results-actions .btn {
    flex: 1 1 0%;
    min-width: 0;
  }
}

/* ============================================================
   23. Responsive — Desktop (1024px+)
   ============================================================ */
@media (min-width: 1024px) {
  :root {
    --text-2xl: 2.5rem;
    --text-3xl: 3.5rem;
  }

  .check-content {
    padding: var(--space-2xl) var(--space-xl);
  }

  .score-circle {
    width: 200px;
    height: 200px;
  }

  .results-list {
    max-width: 700px;
  }

  .result-item {
    padding: var(--space-lg) var(--space-xl);
  }
}

/* ============================================================
   24. Print Styles
   ============================================================ */
@media print {
  body {
    background: white;
    color: black;
  }

  .check-header,
  .nav-buttons,
  .btn,
  .results-actions {
    display: none !important;
  }

  .screen {
    display: block !important;
    page-break-inside: avoid;
  }

  .result-item {
    box-shadow: none;
    border: 1px solid #ccc;
  }

  .score-circle {
    animation: none;
    transform: scale(1);
    opacity: 1;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }
}

/* ============================================================
   25. Sub-Options (Hierarchical Version Selection)
   ============================================================ */
.option-wrapper {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.sub-options-panel {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition:
    max-height var(--transition-base),
    opacity var(--transition-base),
    margin var(--transition-base);
}

.sub-options-panel.active {
  max-height: 500px;
  opacity: 1;
  margin-top: var(--space-sm);
}

.sub-options-inner {
  padding: var(--space-md) var(--space-lg);
  border-left: 3px solid var(--color-primary);
  margin-left: var(--space-md);
  background: linear-gradient(135deg, rgba(235, 94, 40, 0.02), rgba(235, 94, 40, 0.05));
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.sub-options-label {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-dark-soft);
  margin-bottom: var(--space-sm);
}

.sub-options-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.sub-option-btn {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-sm);
  min-height: 38px;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  border: 1.5px solid var(--color-light-gray);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-dark);
  cursor: pointer;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  text-align: left;
}

.sub-option-btn:hover {
  border-color: var(--color-primary);
  background: rgba(235, 94, 40, 0.04);
}

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

.sub-option-btn.selected {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: var(--color-white);
}

/* Keep stacked layout on desktop when sub-options are present */
@media (min-width: 768px) {
  .option-group--has-subs {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .option-group--has-subs .option-btn {
    flex: initial;
  }
}

@media print {
  .sub-options-panel {
    max-height: none;
    opacity: 1;
    overflow: visible;
  }
}